/* vi:set ts=8 sts=4 sw=4 noet:
 *
 * VIM - Vi IMproved	by Bram Moolenaar
 *
 * Do ":help uganda"  in Vim to read copying and usage conditions.
 * Do ":help credits" in Vim to see a list of people who contributed.
 * See README.txt for an overview of the Vim source code.
 */

/*
 * Code to handle user-settable options. This is all pretty much table-
 * driven. Checklist for adding a new option:
 * - Put it in the options array below (copy an existing entry).
 * - For a global option: Add a variable for it in option.h.
 * - For a buffer or window local option:
 *   - Add a PV_XX entry to the enum below.
 *   - Add a variable to the window or buffer struct in structs.h.
 *   - For a window option, add some code to copy_winopt().
 *   - For a buffer option, add some code to buf_copy_options().
 *   - For a buffer string option, add code to check_buf_options().
 * - If it's a numeric option, add any necessary bounds checks to do_set().
 * - If it's a list of flags, add some code in do_set(), search for WW_ALL.
 * - When adding an option with expansion (P_EXPAND), but with a different
 *   default for Vi and Vim (no P_VI_DEF), add some code at VIMEXP.
 * - Add documentation!  One line in doc/quickref.txt, full description in
 *   options.txt, and any other related places.
 * - Add an entry in runtime/optwin.vim.
 * When making changes:
 * - Adjust the help for the option in doc/option.txt.
 * - When an entry has the P_VIM flag, or is lacking the P_VI_DEF flag, add a
 *   comment at the help for the 'compatible' option.
 */

#define IN_OPTION_C
#include "vim.h"

/*
 * The options that are local to a window or buffer have "indir" set to one of
 * these values.  Special values:
 * PV_NONE: global option.
 * PV_WIN is added: window-local option
 * PV_BUF is added: buffer-local option
 * PV_BOTH is added: global option which also has a local value.
 */
#define PV_BOTH 0x1000
#define PV_WIN 0x2000
#define PV_BUF 0x4000
#define PV_MASK 0x0fff
#define OPT_WIN(x) (idopt_T)(PV_WIN + (int)(x))
#define OPT_BUF(x) (idopt_T)(PV_BUF + (int)(x))
#define OPT_BOTH(x) (idopt_T)(PV_BOTH + (int)(x))

/*
 * Definition of the PV_ values for buffer-local options.
 * The BV_ values are defined in option.h.
 */
#define PV_AI OPT_BUF(BV_AI)
#define PV_AR OPT_BOTH(OPT_BUF(BV_AR))
#define PV_BKC OPT_BOTH(OPT_BUF(BV_BKC))
#define PV_BH OPT_BUF(BV_BH)
#define PV_BT OPT_BUF(BV_BT)
#ifdef FEAT_QUICKFIX
#define PV_EFM OPT_BOTH(OPT_BUF(BV_EFM))
#define PV_GP OPT_BOTH(OPT_BUF(BV_GP))
#define PV_MP OPT_BOTH(OPT_BUF(BV_MP))
#endif
#define PV_BIN OPT_BUF(BV_BIN)
#define PV_BL OPT_BUF(BV_BL)
#define PV_BOMB OPT_BUF(BV_BOMB)
#define PV_CI OPT_BUF(BV_CI)
#if defined(FEAT_SMARTINDENT)
#define PV_CINW OPT_BUF(BV_CINW)
#endif
#define PV_CM OPT_BOTH(OPT_BUF(BV_CM))
#ifdef FEAT_FOLDING
#define PV_CMS OPT_BUF(BV_CMS)
#endif
#ifdef FEAT_COMMENTS
#define PV_COM OPT_BUF(BV_COM)
#endif
#ifdef FEAT_FIND_ID
#define PV_DEF OPT_BOTH(OPT_BUF(BV_DEF))
#define PV_INC OPT_BOTH(OPT_BUF(BV_INC))
#endif
#define PV_EOL OPT_BUF(BV_EOL)
#define PV_FIXEOL OPT_BUF(BV_FIXEOL)
#define PV_EP OPT_BOTH(OPT_BUF(BV_EP))
#define PV_ET OPT_BUF(BV_ET)
#define PV_FENC OPT_BUF(BV_FENC)
#if defined(FEAT_BEVAL) && defined(FEAT_EVAL)
#define PV_BEXPR OPT_BOTH(OPT_BUF(BV_BEXPR))
#endif
#define PV_FP OPT_BOTH(OPT_BUF(BV_FP))
#ifdef FEAT_EVAL
#define PV_FEX OPT_BUF(BV_FEX)
#endif
#define PV_FF OPT_BUF(BV_FF)
#define PV_FLP OPT_BUF(BV_FLP)
#define PV_FO OPT_BUF(BV_FO)
#define PV_FT OPT_BUF(BV_FT)
#define PV_IMI OPT_BUF(BV_IMI)
#define PV_IMS OPT_BUF(BV_IMS)
#if defined(FEAT_FIND_ID) && defined(FEAT_EVAL)
#define PV_INEX OPT_BUF(BV_INEX)
#endif
#define PV_INF OPT_BUF(BV_INF)
#define PV_ISK OPT_BUF(BV_ISK)
#ifdef FEAT_KEYMAP
#define PV_KMAP OPT_BUF(BV_KMAP)
#endif
#define PV_KP OPT_BOTH(OPT_BUF(BV_KP))
#define PV_MENC OPT_BOTH(OPT_BUF(BV_MENC))
#define PV_MA OPT_BUF(BV_MA)
#define PV_ML OPT_BUF(BV_ML)
#define PV_MOD OPT_BUF(BV_MOD)
#define PV_MPS OPT_BUF(BV_MPS)
#define PV_NF OPT_BUF(BV_NF)
#define PV_PATH OPT_BOTH(OPT_BUF(BV_PATH))
#define PV_PI OPT_BUF(BV_PI)
#ifdef FEAT_TEXTOBJ
#define PV_QE OPT_BUF(BV_QE)
#endif
#define PV_RO OPT_BUF(BV_RO)
#ifdef FEAT_SMARTINDENT
#define PV_SI OPT_BUF(BV_SI)
#endif
#define PV_SN OPT_BUF(BV_SN)
#define PV_STS OPT_BUF(BV_STS)
#ifdef FEAT_SEARCHPATH
#define PV_SUA OPT_BUF(BV_SUA)
#endif
#define PV_SW OPT_BUF(BV_SW)
#define PV_SWF OPT_BUF(BV_SWF)
#ifdef FEAT_EVAL
#define PV_TFU OPT_BUF(BV_TFU)
#endif
#define PV_TAGS OPT_BOTH(OPT_BUF(BV_TAGS))
#define PV_TC OPT_BOTH(OPT_BUF(BV_TC))
#define PV_TS OPT_BUF(BV_TS)
#define PV_TW OPT_BUF(BV_TW)
#define PV_TX OPT_BUF(BV_TX)
#ifdef FEAT_PERSISTENT_UNDO
#define PV_UDF OPT_BUF(BV_UDF)
#endif
#define PV_WM OPT_BUF(BV_WM)
#ifdef FEAT_VARTABS
#define PV_VSTS OPT_BUF(BV_VSTS)
#define PV_VTS OPT_BUF(BV_VTS)
#endif

/*
 * Definition of the PV_ values for window-local options.
 * The WV_ values are defined in option.h.
 */
#define PV_LIST OPT_WIN(WV_LIST)
#ifdef FEAT_ARABIC
#define PV_ARAB OPT_WIN(WV_ARAB)
#endif
#ifdef FEAT_LINEBREAK
#define PV_BRI OPT_WIN(WV_BRI)
#define PV_BRIOPT OPT_WIN(WV_BRIOPT)
#endif
#define PV_WCR OPT_WIN(WV_WCR)
#ifdef FEAT_DIFF
#define PV_DIFF OPT_WIN(WV_DIFF)
#endif
#ifdef FEAT_FOLDING
#define PV_FDC OPT_WIN(WV_FDC)
#define PV_FEN OPT_WIN(WV_FEN)
#define PV_FDI OPT_WIN(WV_FDI)
#define PV_FDL OPT_WIN(WV_FDL)
#define PV_FDM OPT_WIN(WV_FDM)
#define PV_FML OPT_WIN(WV_FML)
#define PV_FDN OPT_WIN(WV_FDN)
#ifdef FEAT_EVAL
#define PV_FDE OPT_WIN(WV_FDE)
#define PV_FDT OPT_WIN(WV_FDT)
#endif
#define PV_FMR OPT_WIN(WV_FMR)
#endif
#ifdef FEAT_LINEBREAK
#define PV_LBR OPT_WIN(WV_LBR)
#endif
#define PV_NU OPT_WIN(WV_NU)
#define PV_RNU OPT_WIN(WV_RNU)
#ifdef FEAT_LINEBREAK
#define PV_NUW OPT_WIN(WV_NUW)
#endif
#if defined(FEAT_QUICKFIX)
#define PV_PVW OPT_WIN(WV_PVW)
#endif
#ifdef FEAT_RIGHTLEFT
#define PV_RL OPT_WIN(WV_RL)
#define PV_RLC OPT_WIN(WV_RLC)
#endif
#define PV_SCBIND OPT_WIN(WV_SCBIND)
#define PV_SCROLL OPT_WIN(WV_SCROLL)
#define PV_SISO OPT_BOTH(OPT_WIN(WV_SISO))
#define PV_SO OPT_BOTH(OPT_WIN(WV_SO))
#define PV_UL OPT_BOTH(OPT_BUF(BV_UL))
#define PV_WFH OPT_WIN(WV_WFH)
#define PV_WFW OPT_WIN(WV_WFW)
#define PV_WRAP OPT_WIN(WV_WRAP)
#define PV_CRBIND OPT_WIN(WV_CRBIND)
#ifdef FEAT_TERMINAL
#define PV_TWK OPT_WIN(WV_TWK)
#define PV_TWS OPT_WIN(WV_TWS)
#define PV_TWSL OPT_BUF(BV_TWSL)
#endif
#ifdef FEAT_SIGNS
#define PV_SCL OPT_WIN(WV_SCL)
#endif

/* WV_ and BV_ values get typecasted to this for the "indir" field */
typedef enum
{
  PV_NONE = 0,
  PV_MAXVAL = 0xffff /* to avoid warnings for value out of range */
} idopt_T;

/*
 * Options local to a window have a value local to a buffer and global to all
 * buffers.  Indicate this by setting "var" to VAR_WIN.
 */
#define VAR_WIN ((char_u *)-1)

/*
 * These are the global values for options which are also local to a buffer.
 * Only to be used in option.c!
 */
static int p_ai;
static int p_bin;
static int p_bomb;
static char_u *p_bh;
static char_u *p_bt;
static int p_bl;
static int p_ci;
#if defined(FEAT_SMARTINDENT)
static char_u *p_cinw;
#endif
#ifdef FEAT_COMMENTS
static char_u *p_com;
#endif
#ifdef FEAT_FOLDING
static char_u *p_cms;
#endif
#ifdef FEAT_EVAL
static char_u *p_tfu;
#endif
static int p_eol;
static int p_fixeol;
static int p_et;
static char_u *p_fenc;
static char_u *p_ff;
static char_u *p_fo;
static char_u *p_flp;
static char_u *p_ft;
static long p_iminsert;
static long p_imsearch;
#if defined(FEAT_FIND_ID) && defined(FEAT_EVAL)
static char_u *p_inex;
#endif
#if defined(FEAT_EVAL)
static char_u *p_fex;
#endif
static int p_inf;
static char_u *p_isk;
static int p_ml;
static int p_ma;
static int p_mod;
static char_u *p_mps;
static char_u *p_nf;
static int p_pi;
#ifdef FEAT_TEXTOBJ
static char_u *p_qe;
#endif
static int p_ro;
#ifdef FEAT_SMARTINDENT
static int p_si;
#endif
static int p_sn;
static long p_sts;
#if defined(FEAT_SEARCHPATH)
static char_u *p_sua;
#endif
static long p_sw;
static int p_swf;
static long p_ts;
static long p_tw;
static int p_tx;
#ifdef FEAT_PERSISTENT_UNDO
static int p_udf;
#endif
static long p_wm;
#ifdef FEAT_VARTABS
static char_u *p_vsts;
static char_u *p_vts;
#endif
#ifdef FEAT_KEYMAP
static char_u *p_keymap;
#endif
#ifdef FEAT_TERMINAL
static long p_twsl; /* 'termwinscroll' */
#endif

/* Saved values for when 'bin' is set. */
static int p_et_nobin;
static int p_ml_nobin;
static long p_tw_nobin;
static long p_wm_nobin;

/* Saved values for when 'paste' is set */
static int p_ai_nopaste;
static int p_et_nopaste;
static long p_sts_nopaste;
static long p_tw_nopaste;
static long p_wm_nopaste;
#ifdef FEAT_VARTABS
static char_u *p_vsts_nopaste;
#endif

struct vimoption
{
  char *fullname;     // full option name
  char *shortname;    // permissible abbreviation
  long_u flags;       // see below
  char_u *var;        // global option: pointer to variable;
                      // window-local option: VAR_WIN;
                      // buffer-local option: global value
  idopt_T indir;      // global option: PV_NONE;
                      // local option: indirect option index
  char_u *def_val[2]; // default values for variable (vi and vim)
#ifdef FEAT_EVAL
  sctx_T script_ctx; // script context where the option was last set
#define SCTX_INIT \
  , { 0, 0, 0, 1 }
#else
#define SCTX_INIT
#endif
};

#define VI_DEFAULT 0  /* def_val[VI_DEFAULT] is Vi default value */
#define VIM_DEFAULT 1 /* def_val[VIM_DEFAULT] is Vim default value */

/*
 * Flags
 */

// clang-format off

#define P_BOOL 0x01        /* the option is boolean */
#define P_NUM 0x02         /* the option is numeric */
#define P_STRING 0x04      /* the option is a string */
#define P_ALLOCED 0x08     /* the string option is in allocated memory,  \
                              must use free_string_option() when         \
                              assigning new value. Not set if default is \
                              the same. */
#define P_EXPAND 0x10      /* environment expansion.  NOTE: P_EXPAND can \
                              never be used for local or hidden options! */
#define P_NODEFAULT 0x40   /* don't set to default value */
#define P_DEF_ALLOCED 0x80 /* default value is in allocated memory, must \
                               use vim_free() when assigning new value */
#define P_WAS_SET 0x100    /* option has been set/reset */
#define P_NO_MKRC 0x200    /* don't include in :mkvimrc output */
#define P_VI_DEF 0x400     /* Use Vi default for Vim */
#define P_VIM 0x800        /* Vim option, reset when 'cp' set */

/* when option changed, what to display: */
#define P_RSTAT 0x1000 /* redraw status lines */
#define P_RWIN 0x2000  /* redraw current window and recompute text */
#define P_RBUF 0x4000  /* redraw current buffer and recompute text */
#define P_RALL 0x6000  /* redraw all windows */
#define P_RCLR 0x7000  /* clear and redraw all */

#define P_COMMA 0x8000      /* comma separated list */
#define P_ONECOMMA 0x18000L /* P_COMMA and cannot have two consecutive \
                             * commas */
#define P_NODUP 0x20000L    /* don't allow duplicate strings */
#define P_FLAGLIST 0x40000L /* list of single-char flags */

#define P_SECURE 0x80000L      /* cannot change in modeline or secure mode */
#define P_GETTEXT 0x100000L    /* expand default value with _() */
#define P_NOGLOB 0x200000L     /* do not use local value for global vimrc */
#define P_NFNAME 0x400000L     /* only normal file name chars allowed */
#define P_INSECURE 0x800000L   /* option was set from a modeline */
#define P_PRI_MKRC 0x1000000L  /* priority for :mkvimrc (setting option has \
                                  side effects) */
#define P_NO_ML 0x2000000L     /* not allowed in modeline */
#define P_CURSWANT 0x4000000L  /* update curswant required; not needed when \
                                * there is a redraw flag */
#define P_NDNAME 0x8000000L    /* only normal dir name chars allowed */
#define P_RWINONLY 0x10000000L /* only redraw current window */
#define P_MLE 0x20000000L      /* under control of 'modelineexpr' */

#define ISK_LATIN1 (char_u *)"@,48-57,_,192-255"

// clang-format on

/* 'isprint' for latin1 is also used for MS-Windows cp1252, where 0x80 is used
 * for the currency sign. */
#if defined(MSWIN)
#define ISP_LATIN1 (char_u *)"@,~-255"
#else
#define ISP_LATIN1 (char_u *)"@,161-255"
#endif

#define HIGHLIGHT_INIT "8:SpecialKey,~:EndOfBuffer,@:NonText,d:Directory,e:ErrorMsg,i:IncSearch,l:Search,m:MoreMsg,M:ModeMsg,n:LineNr,N:CursorLineNr,r:Question,s:StatusLine,S:StatusLineNC,c:VertSplit,t:Title,v:Visual,V:VisualNOS,w:WarningMsg,W:WildMenu,f:Folded,F:FoldColumn,A:DiffAdd,C:DiffChange,D:DiffDelete,T:DiffText,>:SignColumn,-:Conceal,B:SpellBad,P:SpellCap,R:SpellRare,L:SpellLocal,+:Pmenu,=:PmenuSel,x:PmenuSbar,X:PmenuThumb,*:TabLine,#:TabLineSel,_:TabLineFill,!:CursorColumn,.:CursorLine,o:ColorColumn,q:QuickFixLine,z:StatusLineTerm,Z:StatusLineTermNC"

/* Default python version for pyx* commands */
#if defined(FEAT_PYTHON) && defined(FEAT_PYTHON3)
#define DEFAULT_PYTHON_VER 0
#elif defined(FEAT_PYTHON3)
#define DEFAULT_PYTHON_VER 3
#elif defined(FEAT_PYTHON)
#define DEFAULT_PYTHON_VER 2
#else
#define DEFAULT_PYTHON_VER 0
#endif

// used for 'cinkeys' and 'indentkeys'
#define INDENTKEYS_DEFAULT (char_u *)"0{,0},0),0],:,0#,!^F,o,O,e"

/*
 * options[] is initialized here.
 * The order of the options MUST be alphabetic for ":set all" and findoption().
 * All option names MUST start with a lowercase letter (for findoption()).
 * Exception: "t_" options are at the end.
 * The options with a NULL variable are 'hidden': a set command for them is
 * ignored and they are not printed.
 */
static struct vimoption options[] =
    {
        {"aleph", "al", P_NUM | P_VI_DEF | P_CURSWANT,
#ifdef FEAT_RIGHTLEFT
         (char_u *)&p_aleph,
         PV_NONE,
#else
         (char_u *)NULL,
         PV_NONE,
#endif
         {
#if defined(MSWIN)
             (char_u *)128L,
#else
             (char_u *)224L,
#endif
             (char_u *)0L} SCTX_INIT},
        {"antialias", "anti", P_BOOL | P_VI_DEF | P_VIM | P_RCLR, (char_u *)NULL, PV_NONE, {(char_u *)FALSE, (char_u *)FALSE} SCTX_INIT},
        {"arabic", "arab", P_BOOL | P_VI_DEF | P_VIM | P_CURSWANT,
#ifdef FEAT_ARABIC
         (char_u *)VAR_WIN,
         PV_ARAB,
#else
         (char_u *)NULL,
         PV_NONE,
#endif
         {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"arabicshape", "arshape", P_BOOL | P_VI_DEF | P_VIM | P_RCLR,
#ifdef FEAT_ARABIC
         (char_u *)&p_arshape,
         PV_NONE,
#else
         (char_u *)NULL,
         PV_NONE,
#endif
         {(char_u *)TRUE, (char_u *)0L} SCTX_INIT},
        {"allowrevins", "ari", P_BOOL | P_VI_DEF | P_VIM,
#ifdef FEAT_RIGHTLEFT
         (char_u *)&p_ari,
         PV_NONE,
#else
         (char_u *)NULL,
         PV_NONE,
#endif
         {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"altkeymap", "akm", P_BOOL | P_VI_DEF, (char_u *)NULL, PV_NONE, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"ambiwidth", "ambw", P_STRING | P_VI_DEF | P_RCLR, (char_u *)&p_ambw, PV_NONE, {(char_u *)"single", (char_u *)0L} SCTX_INIT},
        {"autochdir", "acd", P_BOOL | P_VI_DEF,
#ifdef FEAT_AUTOCHDIR
         (char_u *)&p_acd,
         PV_NONE,
         {(char_u *)FALSE, (char_u *)0L}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)0L, (char_u *)0L}
#endif
         SCTX_INIT},
        {"autoindent", "ai", P_BOOL | P_VI_DEF, (char_u *)&p_ai, PV_AI, {(char_u *)TRUE, (char_u *)0L} SCTX_INIT},
        {"autoprint", "ap", P_BOOL | P_VI_DEF, (char_u *)NULL, PV_NONE, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"autoread", "ar", P_BOOL | P_VI_DEF, (char_u *)&p_ar, PV_AR, {(char_u *)TRUE, (char_u *)0L} SCTX_INIT},
        {"autowrite", "aw", P_BOOL | P_VI_DEF, (char_u *)&p_aw, PV_NONE, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"autowriteall", "awa", P_BOOL | P_VI_DEF, (char_u *)&p_awa, PV_NONE, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"background", "bg", P_STRING | P_VI_DEF | P_RCLR, (char_u *)&p_bg, PV_NONE, {
#if (defined(MSWIN))
                                                                                         (char_u *)"dark",
#else
                                                                                         (char_u *)"light",
#endif
                                                                                         (char_u *)0L} SCTX_INIT},
        {"backspace", "bs", P_STRING | P_VI_DEF | P_VIM | P_ONECOMMA | P_NODUP, (char_u *)&p_bs, PV_NONE, {(char_u *)"2", (char_u *)0L} SCTX_INIT},
        {"backup", "bk", P_BOOL | P_VI_DEF | P_VIM, (char_u *)&p_bk, PV_NONE, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"backupcopy", "bkc", P_STRING | P_VIM | P_ONECOMMA | P_NODUP, (char_u *)&p_bkc, PV_BKC,
#ifdef UNIX
         {(char_u *)"yes", (char_u *)"auto"}
#else
         {(char_u *)"auto", (char_u *)"auto"}
#endif
         SCTX_INIT},
        {"backupdir", "bdir", P_STRING | P_EXPAND | P_VI_DEF | P_ONECOMMA | P_NODUP | P_SECURE, (char_u *)&p_bdir, PV_NONE, {(char_u *)DFLT_BDIR, (char_u *)0L} SCTX_INIT},
        {"backupext", "bex", P_STRING | P_VI_DEF | P_NFNAME, (char_u *)&p_bex, PV_NONE, {
#ifdef VMS
                                                                                            (char_u *)"_",
#else
                                                                                            (char_u *)"~",
#endif
                                                                                            (char_u *)0L} SCTX_INIT},
        {"backupskip", "bsk", P_STRING | P_VI_DEF | P_ONECOMMA,
#ifdef FEAT_WILDIGN
         (char_u *)&p_bsk,
         PV_NONE,
         {(char_u *)"", (char_u *)0L}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)0L, (char_u *)0L}
#endif
         SCTX_INIT},
        {"balloondelay", "bdlay", P_NUM | P_VI_DEF,
#ifdef FEAT_BEVAL
         (char_u *)&p_bdlay,
         PV_NONE,
         {(char_u *)600L, (char_u *)0L}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)0L, (char_u *)0L}
#endif
         SCTX_INIT},
        {"ballooneval", "beval", P_BOOL | P_VI_DEF | P_NO_MKRC,
#ifdef FEAT_BEVAL_GUI
         (char_u *)&p_beval,
         PV_NONE,
         {(char_u *)FALSE, (char_u *)0L}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)0L, (char_u *)0L}
#endif
         SCTX_INIT},
        {"balloonevalterm", "bevalterm", P_BOOL | P_VI_DEF | P_NO_MKRC,
#ifdef FEAT_BEVAL_TERM
         (char_u *)&p_bevalterm,
         PV_NONE,
         {(char_u *)FALSE, (char_u *)0L}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)0L, (char_u *)0L}
#endif
         SCTX_INIT},
        {"balloonexpr", "bexpr", P_STRING | P_ALLOCED | P_VI_DEF | P_VIM | P_MLE,
#if defined(FEAT_BEVAL) && defined(FEAT_EVAL)
         (char_u *)&p_bexpr,
         PV_BEXPR,
         {(char_u *)"", (char_u *)0L}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)0L, (char_u *)0L}
#endif
         SCTX_INIT},
        {"beautify", "bf", P_BOOL | P_VI_DEF, (char_u *)NULL, PV_NONE, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"belloff", "bo", P_STRING | P_VI_DEF | P_COMMA | P_NODUP, (char_u *)&p_bo, PV_NONE, {(char_u *)"", (char_u *)0L} SCTX_INIT},
        {"binary", "bin", P_BOOL | P_VI_DEF | P_RSTAT, (char_u *)&p_bin, PV_BIN, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"bioskey", "biosk", P_BOOL | P_VI_DEF, (char_u *)NULL, PV_NONE, {(char_u *)TRUE, (char_u *)0L} SCTX_INIT},
        {"bomb", NULL, P_BOOL | P_NO_MKRC | P_VI_DEF | P_RSTAT, (char_u *)&p_bomb, PV_BOMB, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"breakat", "brk", P_STRING | P_VI_DEF | P_RALL | P_FLAGLIST,
#ifdef FEAT_LINEBREAK
         (char_u *)&p_breakat,
         PV_NONE,
         {(char_u *)" \t!@*-+;:,./?", (char_u *)0L}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)0L, (char_u *)0L}
#endif
         SCTX_INIT},
        {"breakindent", "bri", P_BOOL | P_VI_DEF | P_VIM | P_RWIN,
#ifdef FEAT_LINEBREAK
         (char_u *)VAR_WIN,
         PV_BRI,
         {(char_u *)FALSE, (char_u *)0L}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)0L, (char_u *)0L}
#endif
         SCTX_INIT},
        {"breakindentopt", "briopt", P_STRING | P_ALLOCED | P_VI_DEF | P_RBUF | P_ONECOMMA | P_NODUP,
#ifdef FEAT_LINEBREAK
         (char_u *)VAR_WIN,
         PV_BRIOPT,
         {(char_u *)"", (char_u *)NULL}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)"", (char_u *)NULL}
#endif
         SCTX_INIT},
        {"browsedir", "bsdir", P_STRING | P_VI_DEF,
#ifdef FEAT_BROWSE
         (char_u *)&p_bsdir,
         PV_NONE,
         {(char_u *)"last", (char_u *)0L}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)0L, (char_u *)0L}
#endif
         SCTX_INIT},
        {"bufhidden", "bh", P_STRING | P_ALLOCED | P_VI_DEF | P_NOGLOB, (char_u *)&p_bh, PV_BH, {(char_u *)"", (char_u *)0L} SCTX_INIT},
        {"buflisted", "bl", P_BOOL | P_VI_DEF | P_NOGLOB, (char_u *)&p_bl, PV_BL, {(char_u *)1L, (char_u *)0L} SCTX_INIT},
        {"buftype", "bt", P_STRING | P_ALLOCED | P_VI_DEF | P_NOGLOB, (char_u *)&p_bt, PV_BT, {(char_u *)"", (char_u *)0L} SCTX_INIT},
        {"casemap", "cmp", P_STRING | P_VI_DEF | P_ONECOMMA | P_NODUP, (char_u *)&p_cmp, PV_NONE, {(char_u *)"internal,keepascii", (char_u *)0L} SCTX_INIT},
        {"cdpath", "cd", P_STRING | P_EXPAND | P_VI_DEF | P_SECURE | P_COMMA | P_NODUP,
#ifdef FEAT_SEARCHPATH
         (char_u *)&p_cdpath,
         PV_NONE,
         {(char_u *)",,", (char_u *)0L}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)0L, (char_u *)0L}
#endif
         SCTX_INIT},
        {"cedit", NULL, P_STRING, (char_u *)NULL, PV_NONE, {(char_u *)0L, (char_u *)0L} SCTX_INIT},
        {"charconvert", "ccv", P_STRING | P_VI_DEF | P_SECURE,
#if defined(FEAT_EVAL)
         (char_u *)&p_ccv,
         PV_NONE,
         {(char_u *)"", (char_u *)0L}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)0L, (char_u *)0L}
#endif
         SCTX_INIT},
        {"cindent", "cin", P_BOOL | P_VI_DEF | P_VIM, (char_u *)NULL, PV_NONE, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"cinkeys", "cink", P_STRING | P_ALLOCED | P_VI_DEF | P_ONECOMMA | P_NODUP, (char_u *)NULL, PV_NONE, {(char_u *)0L, (char_u *)0L} SCTX_INIT},
        {"cinoptions", "cino", P_STRING | P_ALLOCED | P_VI_DEF | P_ONECOMMA | P_NODUP, (char_u *)NULL, PV_NONE, {(char_u *)"", (char_u *)0L} SCTX_INIT},
        {"cinwords", "cinw", P_STRING | P_ALLOCED | P_VI_DEF | P_ONECOMMA | P_NODUP,
#if defined(FEAT_SMARTINDENT)
         (char_u *)&p_cinw,
         PV_CINW,
         {(char_u *)"if,else,while,do,for,switch", (char_u *)0L}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)0L, (char_u *)0L}
#endif
         SCTX_INIT},
        {"clipboard", "cb", P_STRING | P_VI_DEF | P_ONECOMMA | P_NODUP, (char_u *)NULL, PV_NONE, {(char_u *)"", (char_u *)0L} SCTX_INIT},
        {"cmdheight", "ch", P_NUM | P_VI_DEF | P_RALL, (char_u *)&p_ch, PV_NONE, {(char_u *)1L, (char_u *)0L} SCTX_INIT},
        {"cmdwinheight", "cwh", P_NUM | P_VI_DEF, (char_u *)NULL, PV_NONE, {(char_u *)7L, (char_u *)0L} SCTX_INIT},
        {"colorcolumn", "cc", P_STRING | P_VI_DEF | P_ONECOMMA | P_NODUP | P_RWIN, (char_u *)NULL, PV_NONE, {(char_u *)"", (char_u *)0L} SCTX_INIT},
        {"columns", "co", P_NUM | P_NODEFAULT | P_NO_MKRC | P_VI_DEF | P_RCLR, (char_u *)&Columns, PV_NONE, {(char_u *)80L, (char_u *)0L} SCTX_INIT},
        {"comments", "com", P_STRING | P_ALLOCED | P_VI_DEF | P_ONECOMMA | P_NODUP | P_CURSWANT,
#ifdef FEAT_COMMENTS
         (char_u *)&p_com,
         PV_COM,
         {(char_u *)"s1:/*,mb:*,ex:*/,://,b:#,:%,:XCOMM,n:>,fb:-", (char_u *)0L}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)0L, (char_u *)0L}
#endif
         SCTX_INIT},
        {"commentstring", "cms", P_STRING | P_ALLOCED | P_VI_DEF | P_CURSWANT,
#ifdef FEAT_FOLDING
         (char_u *)&p_cms,
         PV_CMS,
         {(char_u *)"/*%s*/", (char_u *)0L}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)0L, (char_u *)0L}
#endif
         SCTX_INIT},
        /* P_PRI_MKRC isn't needed here, optval_default()
			     * always returns TRUE for 'compatible' */
        {"compatible", "cp", P_BOOL | P_RALL, (char_u *)&p_cp, PV_NONE, {(char_u *)TRUE, (char_u *)FALSE} SCTX_INIT},
        {"complete", "cpt", P_STRING | P_ALLOCED | P_VI_DEF | P_ONECOMMA | P_NODUP, (char_u *)NULL, PV_NONE, {(char_u *)0L, (char_u *)0L} SCTX_INIT},
        {"concealcursor", "cocu", P_STRING | P_ALLOCED | P_RWIN | P_VI_DEF, (char_u *)NULL, PV_NONE, {(char_u *)NULL, (char_u *)0L} SCTX_INIT},
        {"conceallevel", "cole", P_NUM | P_RWIN | P_VI_DEF, (char_u *)NULL, PV_NONE, {(char_u *)0L, (char_u *)0L} SCTX_INIT},
        {"completefunc", "cfu", P_STRING | P_ALLOCED | P_VI_DEF | P_SECURE, (char_u *)NULL, PV_NONE, {(char_u *)0L, (char_u *)0L} SCTX_INIT},
        {"completeopt", "cot", P_STRING | P_VI_DEF | P_ONECOMMA | P_NODUP, (char_u *)NULL, PV_NONE, {(char_u *)0L, (char_u *)0L} SCTX_INIT},
        {"confirm", "cf", P_BOOL | P_VI_DEF, (char_u *)NULL, PV_NONE, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"conskey", "consk", P_BOOL | P_VI_DEF, (char_u *)NULL, PV_NONE, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"copyindent", "ci", P_BOOL | P_VI_DEF | P_VIM, (char_u *)&p_ci, PV_CI, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"cpoptions", "cpo", P_STRING | P_VIM | P_RALL | P_FLAGLIST, (char_u *)&p_cpo, PV_NONE, {(char_u *)CPO_VI, (char_u *)CPO_VIM} SCTX_INIT},
        {"cryptmethod", "cm", P_STRING | P_ALLOCED | P_VI_DEF, (char_u *)NULL, PV_NONE, {(char_u *)0L, (char_u *)0L} SCTX_INIT},
        {"cscopepathcomp", "cspc", P_NUM | P_VI_DEF | P_VIM, (char_u *)NULL, PV_NONE, {(char_u *)0L, (char_u *)0L} SCTX_INIT},
        {"cscopeprg", "csprg", P_STRING | P_EXPAND | P_VI_DEF | P_SECURE, (char_u *)NULL, PV_NONE, {(char_u *)0L, (char_u *)0L} SCTX_INIT},
        {"cscopequickfix", "csqf", P_STRING | P_VI_DEF | P_ONECOMMA | P_NODUP, (char_u *)NULL, PV_NONE, {(char_u *)0L, (char_u *)0L} SCTX_INIT},
        {"cscoperelative", "csre", P_BOOL | P_VI_DEF | P_VIM, (char_u *)NULL, PV_NONE, {(char_u *)0L, (char_u *)0L} SCTX_INIT},
        {"cscopetag", "cst", P_BOOL | P_VI_DEF | P_VIM, (char_u *)NULL, PV_NONE, {(char_u *)0L, (char_u *)0L} SCTX_INIT},
        {"cscopetagorder", "csto", P_NUM | P_VI_DEF | P_VIM, (char_u *)NULL, PV_NONE, {(char_u *)0L, (char_u *)0L} SCTX_INIT},
        {"cscopeverbose", "csverb", P_BOOL | P_VI_DEF | P_VIM, (char_u *)NULL, PV_NONE, {(char_u *)0L, (char_u *)0L} SCTX_INIT},
        {"cursorbind", "crb", P_BOOL | P_VI_DEF, (char_u *)VAR_WIN, PV_CRBIND, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"cursorcolumn", "cuc", P_BOOL | P_VI_DEF | P_RWINONLY, (char_u *)NULL, PV_NONE, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"cursorline", "cul", P_BOOL | P_VI_DEF | P_RWINONLY, (char_u *)NULL, PV_NONE, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"debug", NULL, P_STRING | P_VI_DEF, (char_u *)&p_debug, PV_NONE, {(char_u *)"", (char_u *)0L} SCTX_INIT},
        {"define", "def", P_STRING | P_ALLOCED | P_VI_DEF | P_CURSWANT,
#ifdef FEAT_FIND_ID
         (char_u *)&p_def,
         PV_DEF,
         {(char_u *)"^\\s*#\\s*define", (char_u *)0L}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)NULL, (char_u *)0L}
#endif
         SCTX_INIT},
        {"delcombine", "deco", P_BOOL | P_VI_DEF | P_VIM, (char_u *)&p_deco, PV_NONE, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"dictionary", "dict", P_STRING | P_EXPAND | P_VI_DEF | P_ONECOMMA | P_NODUP | P_NDNAME, (char_u *)NULL, PV_NONE, {(char_u *)"", (char_u *)0L} SCTX_INIT},
        {"diff", NULL, P_BOOL | P_VI_DEF | P_RWIN | P_NOGLOB,
#ifdef FEAT_DIFF
         (char_u *)VAR_WIN,
         PV_DIFF,
#else
         (char_u *)NULL,
         PV_NONE,
#endif
         {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"diffexpr", "dex", P_STRING | P_VI_DEF | P_SECURE | P_CURSWANT,
#if defined(FEAT_DIFF) && defined(FEAT_EVAL)
         (char_u *)&p_dex,
         PV_NONE,
         {(char_u *)"", (char_u *)0L}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)0L, (char_u *)0L}
#endif
         SCTX_INIT},
        {"diffopt", "dip", P_STRING | P_ALLOCED | P_VI_DEF | P_RWIN | P_ONECOMMA | P_NODUP,
#ifdef FEAT_DIFF
         (char_u *)&p_dip,
         PV_NONE,
         {(char_u *)"internal,filler", (char_u *)NULL}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)"", (char_u *)NULL}
#endif
         SCTX_INIT},
        {"digraph", "dg", P_BOOL | P_VI_DEF | P_VIM,
#ifdef FEAT_DIGRAPHS
         (char_u *)&p_dg,
         PV_NONE,
#else
         (char_u *)NULL,
         PV_NONE,
#endif
         {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"directory", "dir", P_STRING | P_EXPAND | P_VI_DEF | P_ONECOMMA | P_NODUP | P_SECURE, (char_u *)&p_dir, PV_NONE, {(char_u *)DFLT_DIR, (char_u *)0L} SCTX_INIT},
        {"display", "dy", P_STRING | P_VI_DEF | P_ONECOMMA | P_RALL | P_NODUP, (char_u *)&p_dy, PV_NONE, {(char_u *)"", (char_u *)0L} SCTX_INIT},
        {"eadirection", "ead", P_STRING | P_VI_DEF, (char_u *)&p_ead, PV_NONE, {(char_u *)"both", (char_u *)0L} SCTX_INIT},
        {"edcompatible", "ed", P_BOOL | P_VI_DEF, (char_u *)&p_ed, PV_NONE, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"emoji", "emo", P_BOOL | P_VI_DEF | P_RCLR, (char_u *)&p_emoji, PV_NONE, {(char_u *)TRUE, (char_u *)0L} SCTX_INIT},
        {"encoding", "enc", P_STRING | P_VI_DEF | P_RCLR | P_NO_ML, (char_u *)&p_enc, PV_NONE, {(char_u *)ENC_DFLT, (char_u *)0L} SCTX_INIT},
        {"endofline", "eol", P_BOOL | P_NO_MKRC | P_VI_DEF | P_RSTAT, (char_u *)&p_eol, PV_EOL, {(char_u *)TRUE, (char_u *)0L} SCTX_INIT},
        {"equalalways", "ea", P_BOOL | P_VI_DEF | P_RALL, (char_u *)&p_ea, PV_NONE, {(char_u *)TRUE, (char_u *)0L} SCTX_INIT},
        {"equalprg", "ep", P_STRING | P_EXPAND | P_VI_DEF | P_SECURE, (char_u *)&p_ep, PV_EP, {(char_u *)"", (char_u *)0L} SCTX_INIT},
        {"errorbells", "eb", P_BOOL | P_VI_DEF, (char_u *)&p_eb, PV_NONE, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"errorfile", "ef", P_STRING | P_EXPAND | P_VI_DEF | P_SECURE,
#ifdef FEAT_QUICKFIX
         (char_u *)&p_ef,
         PV_NONE,
         {(char_u *)DFLT_ERRORFILE, (char_u *)0L}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)NULL, (char_u *)0L}
#endif
         SCTX_INIT},
        {"errorformat", "efm", P_STRING | P_VI_DEF | P_ONECOMMA | P_NODUP,
#ifdef FEAT_QUICKFIX
         (char_u *)&p_efm,
         PV_EFM,
         {(char_u *)DFLT_EFM, (char_u *)0L}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)NULL, (char_u *)0L}
#endif
         SCTX_INIT},
        {"esckeys", "ek", P_BOOL | P_VIM, (char_u *)&p_ek, PV_NONE, {(char_u *)FALSE, (char_u *)TRUE} SCTX_INIT},
        {"eventignore", "ei", P_STRING | P_VI_DEF | P_ONECOMMA | P_NODUP, (char_u *)&p_ei, PV_NONE, {(char_u *)"", (char_u *)0L} SCTX_INIT},
        {"expandtab", "et", P_BOOL | P_VI_DEF | P_VIM, (char_u *)&p_et, PV_ET, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"exrc", "ex", P_BOOL | P_VI_DEF | P_SECURE, (char_u *)&p_exrc, PV_NONE, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"fileencoding", "fenc", P_STRING | P_ALLOCED | P_VI_DEF | P_RSTAT | P_RBUF | P_NO_MKRC, (char_u *)&p_fenc, PV_FENC, {(char_u *)"", (char_u *)0L} SCTX_INIT},
        {"fileencodings", "fencs", P_STRING | P_VI_DEF | P_ONECOMMA, (char_u *)&p_fencs, PV_NONE, {(char_u *)"ucs-bom", (char_u *)0L} SCTX_INIT},
        {"fileformat", "ff", P_STRING | P_ALLOCED | P_VI_DEF | P_RSTAT | P_NO_MKRC | P_CURSWANT, (char_u *)&p_ff, PV_FF, {(char_u *)DFLT_FF, (char_u *)0L} SCTX_INIT},
        {"fileformats", "ffs", P_STRING | P_VIM | P_ONECOMMA | P_NODUP, (char_u *)&p_ffs, PV_NONE, {(char_u *)DFLT_FFS_VI, (char_u *)DFLT_FFS_VIM} SCTX_INIT},
        {"fileignorecase", "fic", P_BOOL | P_VI_DEF, (char_u *)&p_fic, PV_NONE, {
#ifdef CASE_INSENSITIVE_FILENAME
                                                                                    (char_u *)TRUE,
#else
                                                                                    (char_u *)FALSE,
#endif
                                                                                    (char_u *)0L} SCTX_INIT},
        {"filetype", "ft", P_STRING | P_ALLOCED | P_VI_DEF | P_NOGLOB | P_NFNAME, (char_u *)&p_ft, PV_FT, {(char_u *)"", (char_u *)0L} SCTX_INIT},
        {"fillchars", "fcs", P_STRING | P_VI_DEF | P_RALL | P_ONECOMMA | P_NODUP, (char_u *)&p_fcs, PV_NONE, {(char_u *)"vert:|,fold:-", (char_u *)0L} SCTX_INIT},
        {"fixendofline", "fixeol", P_BOOL | P_VI_DEF | P_RSTAT, (char_u *)&p_fixeol, PV_FIXEOL, {(char_u *)TRUE, (char_u *)0L} SCTX_INIT},
        {"fkmap", "fk", P_BOOL | P_VI_DEF, (char_u *)NULL, PV_NONE, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"flash", "fl", P_BOOL | P_VI_DEF, (char_u *)NULL, PV_NONE, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"foldclose", "fcl", P_STRING | P_VI_DEF | P_ONECOMMA | P_NODUP | P_RWIN,
#ifdef FEAT_FOLDING
         (char_u *)&p_fcl,
         PV_NONE,
         {(char_u *)"", (char_u *)0L}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)NULL, (char_u *)0L}
#endif
         SCTX_INIT},
        {"foldcolumn", "fdc", P_NUM | P_VI_DEF | P_RWIN,
#ifdef FEAT_FOLDING
         (char_u *)VAR_WIN,
         PV_FDC,
         {(char_u *)FALSE, (char_u *)0L}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)NULL, (char_u *)0L}
#endif
         SCTX_INIT},
        {"foldenable", "fen", P_BOOL | P_VI_DEF | P_RWIN,
#ifdef FEAT_FOLDING
         (char_u *)VAR_WIN,
         PV_FEN,
         {(char_u *)TRUE, (char_u *)0L}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)NULL, (char_u *)0L}
#endif
         SCTX_INIT},
        {"foldexpr", "fde", P_STRING | P_ALLOCED | P_VIM | P_VI_DEF | P_RWIN | P_MLE,
#if defined(FEAT_FOLDING) && defined(FEAT_EVAL)
         (char_u *)VAR_WIN,
         PV_FDE,
         {(char_u *)"0", (char_u *)NULL}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)NULL, (char_u *)0L}
#endif
         SCTX_INIT},
        {"foldignore", "fdi", P_STRING | P_ALLOCED | P_VIM | P_VI_DEF | P_RWIN,
#ifdef FEAT_FOLDING
         (char_u *)VAR_WIN,
         PV_FDI,
         {(char_u *)"#", (char_u *)NULL}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)NULL, (char_u *)0L}
#endif
         SCTX_INIT},
        {"foldlevel", "fdl", P_NUM | P_VI_DEF | P_RWIN,
#ifdef FEAT_FOLDING
         (char_u *)VAR_WIN,
         PV_FDL,
         {(char_u *)0L, (char_u *)0L}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)NULL, (char_u *)0L}
#endif
         SCTX_INIT},
        {"foldlevelstart", "fdls", P_NUM | P_VI_DEF | P_CURSWANT,
#ifdef FEAT_FOLDING
         (char_u *)&p_fdls,
         PV_NONE,
         {(char_u *)-1L, (char_u *)0L}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)NULL, (char_u *)0L}
#endif
         SCTX_INIT},
        {"foldmarker", "fmr", P_STRING | P_ALLOCED | P_VIM | P_VI_DEF | P_RWIN | P_ONECOMMA | P_NODUP,
#ifdef FEAT_FOLDING
         (char_u *)VAR_WIN,
         PV_FMR,
         {(char_u *)"{{{,}}}", (char_u *)NULL}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)NULL, (char_u *)0L}
#endif
         SCTX_INIT},
        {"foldmethod", "fdm", P_STRING | P_ALLOCED | P_VIM | P_VI_DEF | P_RWIN,
#ifdef FEAT_FOLDING
         (char_u *)VAR_WIN,
         PV_FDM,
         {(char_u *)"manual", (char_u *)NULL}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)NULL, (char_u *)0L}
#endif
         SCTX_INIT},
        {"foldminlines", "fml", P_NUM | P_VI_DEF | P_RWIN,
#ifdef FEAT_FOLDING
         (char_u *)VAR_WIN,
         PV_FML,
         {(char_u *)1L, (char_u *)0L}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)NULL, (char_u *)0L}
#endif
         SCTX_INIT},
        {"foldnestmax", "fdn", P_NUM | P_VI_DEF | P_RWIN,
#ifdef FEAT_FOLDING
         (char_u *)VAR_WIN,
         PV_FDN,
         {(char_u *)20L, (char_u *)0L}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)NULL, (char_u *)0L}
#endif
         SCTX_INIT},
        {"foldopen", "fdo", P_STRING | P_VI_DEF | P_ONECOMMA | P_NODUP | P_CURSWANT,
#ifdef FEAT_FOLDING
         (char_u *)&p_fdo,
         PV_NONE,
         {(char_u *)"block,hor,mark,percent,quickfix,search,tag,undo", (char_u *)0L}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)NULL, (char_u *)0L}
#endif
         SCTX_INIT},
        {"foldtext", "fdt", P_STRING | P_ALLOCED | P_VIM | P_VI_DEF | P_RWIN | P_MLE,
#if defined(FEAT_FOLDING) && defined(FEAT_EVAL)
         (char_u *)VAR_WIN,
         PV_FDT,
         {(char_u *)"foldtext()", (char_u *)NULL}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)NULL, (char_u *)0L}
#endif
         SCTX_INIT},
        {"formatexpr", "fex", P_STRING | P_ALLOCED | P_VI_DEF | P_VIM | P_MLE,
#ifdef FEAT_EVAL
         (char_u *)&p_fex,
         PV_FEX,
         {(char_u *)"", (char_u *)0L}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)0L, (char_u *)0L}
#endif
         SCTX_INIT},
        {"formatoptions", "fo", P_STRING | P_ALLOCED | P_VIM | P_FLAGLIST, (char_u *)&p_fo, PV_FO, {(char_u *)DFLT_FO_VI, (char_u *)DFLT_FO_VIM} SCTX_INIT},
        {"formatlistpat", "flp", P_STRING | P_ALLOCED | P_VI_DEF, (char_u *)&p_flp, PV_FLP, {(char_u *)"^\\s*\\d\\+[\\]:.)}\\t ]\\s*", (char_u *)0L} SCTX_INIT},
        {"formatprg", "fp", P_STRING | P_EXPAND | P_VI_DEF | P_SECURE, (char_u *)&p_fp, PV_FP, {(char_u *)"", (char_u *)0L} SCTX_INIT},
        {"fsync", "fs", P_BOOL | P_SECURE | P_VI_DEF,
#ifdef HAVE_FSYNC
         (char_u *)&p_fs,
         PV_NONE,
         {(char_u *)TRUE, (char_u *)0L}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)FALSE, (char_u *)0L}
#endif
         SCTX_INIT},
        {"gdefault", "gd", P_BOOL | P_VI_DEF | P_VIM, (char_u *)&p_gd, PV_NONE, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"graphic", "gr", P_BOOL | P_VI_DEF, (char_u *)NULL, PV_NONE, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"grepformat", "gfm", P_STRING | P_VI_DEF | P_ONECOMMA | P_NODUP,
#ifdef FEAT_QUICKFIX
         (char_u *)&p_gefm,
         PV_NONE,
         {(char_u *)DFLT_GREPFORMAT, (char_u *)0L}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)NULL, (char_u *)0L}
#endif
         SCTX_INIT},
        {"grepprg", "gp", P_STRING | P_EXPAND | P_VI_DEF | P_SECURE,
#ifdef FEAT_QUICKFIX
         (char_u *)&p_gp,
         PV_GP,
         {
#ifdef MSWIN
             /* may be changed to "grep -n" in os_win32.c */
             (char_u *)"findstr /n",
#else
#ifdef UNIX
             /* Add an extra file name so that grep will always
			     * insert a file name in the match line. */
             (char_u *)"grep -n $* /dev/null",
#else
#ifdef VMS
             (char_u *)"SEARCH/NUMBERS ",
#else
             (char_u *)"grep -n ",
#endif
#endif
#endif
             (char_u *)0L}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)NULL, (char_u *)0L}
#endif
         SCTX_INIT},
        {"guicursor", "gcr", P_STRING | P_VI_DEF | P_ONECOMMA | P_NODUP, (char_u *)NULL, PV_NONE, {(char_u *)NULL, (char_u *)0L} SCTX_INIT},
        {"guifont", "gfn", P_STRING | P_VI_DEF | P_RCLR | P_ONECOMMA | P_NODUP, (char_u *)NULL, PV_NONE, {(char_u *)NULL, (char_u *)0L} SCTX_INIT},
        {"guifontset", "gfs", P_STRING | P_VI_DEF | P_RCLR | P_ONECOMMA, (char_u *)NULL, PV_NONE, {(char_u *)NULL, (char_u *)0L} SCTX_INIT},
        {"guifontwide", "gfw", P_STRING | P_VI_DEF | P_RCLR | P_ONECOMMA | P_NODUP, (char_u *)NULL, PV_NONE, {(char_u *)NULL, (char_u *)0L} SCTX_INIT},
        {"guiheadroom", "ghr", P_NUM | P_VI_DEF, (char_u *)NULL, PV_NONE, {(char_u *)50L, (char_u *)0L} SCTX_INIT},
        {"guioptions", "go", P_STRING | P_VI_DEF | P_RALL | P_FLAGLIST, (char_u *)NULL, PV_NONE, {(char_u *)NULL, (char_u *)0L} SCTX_INIT},
        {"guipty", NULL, P_BOOL | P_VI_DEF, (char_u *)NULL, PV_NONE, {(char_u *)TRUE, (char_u *)0L} SCTX_INIT},
        {"guitablabel", "gtl", P_STRING | P_VI_DEF | P_RWIN | P_MLE, (char_u *)NULL, PV_NONE, {(char_u *)NULL, (char_u *)0L} SCTX_INIT},
        {"guitabtooltip", "gtt", P_STRING | P_VI_DEF | P_RWIN, (char_u *)NULL, PV_NONE, {(char_u *)NULL, (char_u *)0L} SCTX_INIT},
        {"hardtabs", "ht", P_NUM | P_VI_DEF, (char_u *)NULL, PV_NONE, {(char_u *)0L, (char_u *)0L} SCTX_INIT},
        {"helpfile", "hf", P_STRING | P_EXPAND | P_VI_DEF | P_SECURE, (char_u *)&p_hf, PV_NONE, {(char_u *)DFLT_HELPFILE, (char_u *)0L} SCTX_INIT},
        {"helpheight", "hh", P_NUM | P_VI_DEF, (char_u *)&p_hh, PV_NONE, {(char_u *)20L, (char_u *)0L} SCTX_INIT},
        {"helplang", "hlg", P_STRING | P_VI_DEF | P_ONECOMMA,
#ifdef FEAT_MULTI_LANG
         (char_u *)&p_hlg,
         PV_NONE,
         {(char_u *)"", (char_u *)0L}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)0L, (char_u *)0L}
#endif
         SCTX_INIT},
        {"hidden", "hid", P_BOOL | P_VI_DEF, (char_u *)&p_hid, PV_NONE, {(char_u *)TRUE, (char_u *)0L} SCTX_INIT},
        {"highlight", "hl", P_STRING | P_VI_DEF | P_RCLR | P_ONECOMMA | P_NODUP, (char_u *)&p_hl, PV_NONE, {(char_u *)HIGHLIGHT_INIT, (char_u *)0L} SCTX_INIT},
        {"history", "hi", P_NUM | P_VIM, (char_u *)&p_hi, PV_NONE, {(char_u *)0L, (char_u *)50L} SCTX_INIT},
        {"hkmap", "hk", P_BOOL | P_VI_DEF | P_VIM,
#ifdef FEAT_RIGHTLEFT
         (char_u *)&p_hkmap,
         PV_NONE,
#else
         (char_u *)NULL,
         PV_NONE,
#endif
         {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"hkmapp", "hkp", P_BOOL | P_VI_DEF | P_VIM,
#ifdef FEAT_RIGHTLEFT
         (char_u *)&p_hkmapp,
         PV_NONE,
#else
         (char_u *)NULL,
         PV_NONE,
#endif
         {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"hlsearch", "hls", P_BOOL | P_VI_DEF | P_VIM | P_RALL, (char_u *)&p_hls, PV_NONE, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"icon", NULL, P_BOOL | P_VI_DEF, (char_u *)NULL, PV_NONE, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"iconstring", NULL, P_STRING | P_VI_DEF | P_MLE, (char_u *)NULL, PV_NONE, {(char_u *)"", (char_u *)0L} SCTX_INIT},
        {"ignorecase", "ic", P_BOOL | P_VI_DEF, (char_u *)&p_ic, PV_NONE, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"imactivatefunc", "imaf", P_STRING | P_VI_DEF | P_SECURE,
#if defined(FEAT_EVAL)
         (char_u *)&p_imaf,
         PV_NONE,
         {(char_u *)"", (char_u *)NULL}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)NULL, (char_u *)0L}
#endif
         SCTX_INIT},
        {"imactivatekey", "imak", P_STRING | P_VI_DEF, (char_u *)NULL, PV_NONE, {(char_u *)"", (char_u *)0L} SCTX_INIT},
        {"imcmdline", "imc", P_BOOL | P_VI_DEF, (char_u *)&p_imcmdline, PV_NONE, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"imdisable", "imd", P_BOOL | P_VI_DEF, (char_u *)&p_imdisable, PV_NONE,
#ifdef __sgi
         {(char_u *)TRUE, (char_u *)0L}
#else
         {(char_u *)FALSE, (char_u *)0L}
#endif
         SCTX_INIT},
        {"iminsert", "imi", P_NUM | P_VI_DEF, (char_u *)&p_iminsert, PV_IMI, {(char_u *)B_IMODE_NONE, (char_u *)0L} SCTX_INIT},
        {"imsearch", "ims", P_NUM | P_VI_DEF, (char_u *)&p_imsearch, PV_IMS, {(char_u *)B_IMODE_USE_INSERT, (char_u *)0L} SCTX_INIT},
        {"imstatusfunc", "imsf", P_STRING | P_VI_DEF | P_SECURE,
#if defined(FEAT_EVAL)
         (char_u *)&p_imsf,
         PV_NONE,
         {(char_u *)"", (char_u *)NULL}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)NULL, (char_u *)0L}
#endif
         SCTX_INIT},
        {"imstyle", "imst", P_NUM | P_VI_DEF | P_SECURE, (char_u *)NULL, PV_NONE, {(char_u *)0L, (char_u *)0L} SCTX_INIT},
        {"include", "inc", P_STRING | P_ALLOCED | P_VI_DEF,
#ifdef FEAT_FIND_ID
         (char_u *)&p_inc,
         PV_INC,
         {(char_u *)"^\\s*#\\s*include", (char_u *)0L}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)0L, (char_u *)0L}
#endif
         SCTX_INIT},
        {"includeexpr", "inex", P_STRING | P_ALLOCED | P_VI_DEF | P_MLE,
#if defined(FEAT_FIND_ID) && defined(FEAT_EVAL)
         (char_u *)&p_inex,
         PV_INEX,
         {(char_u *)"", (char_u *)0L}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)0L, (char_u *)0L}
#endif
         SCTX_INIT},
        {"incsearch", "is", P_BOOL | P_VI_DEF | P_VIM, (char_u *)&p_is, PV_NONE, {(char_u *)TRUE, (char_u *)0L} SCTX_INIT},
        {"indentexpr", "inde", P_STRING | P_ALLOCED | P_VI_DEF | P_VIM | P_MLE, (char_u *)NULL, PV_NONE, {(char_u *)0L, (char_u *)0L} SCTX_INIT},
        {"indentkeys", "indk", P_STRING | P_ALLOCED | P_VI_DEF | P_ONECOMMA | P_NODUP, (char_u *)NULL, PV_NONE, {(char_u *)0L, (char_u *)0L} SCTX_INIT},
        {"infercase", "inf", P_BOOL | P_VI_DEF, (char_u *)&p_inf, PV_INF, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"insertmode", "im", P_BOOL | P_VI_DEF | P_VIM, (char_u *)&p_im, PV_NONE, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"isfname", "isf", P_STRING | P_VI_DEF | P_COMMA | P_NODUP, (char_u *)&p_isf, PV_NONE, {
#ifdef BACKSLASH_IN_FILENAME
                                                                                                   /* Excluded are: & and ^ are special in cmd.exe
				 * ( and ) are used in text separating fnames */
                                                                                                   (char_u *)"@,48-57,/,\\,.,-,_,+,,,#,$,%,{,},[,],:,@-@,!,~,=",
#else
#ifdef VMS
                                                                                                   (char_u *)"@,48-57,/,.,-,_,+,,,#,$,%,<,>,[,],:,;,~",
#else /* UNIX et al. */
#ifdef EBCDIC
                                                                                                   (char_u *)"@,240-249,/,.,-,_,+,,,#,$,%,~,=",
#else
                                                                                                   (char_u *)"@,48-57,/,.,-,_,+,,,#,$,%,~,=",
#endif
#endif
#endif
                                                                                                   (char_u *)0L} SCTX_INIT},
        {"isident", "isi", P_STRING | P_VI_DEF | P_COMMA | P_NODUP, (char_u *)&p_isi, PV_NONE, {
#if defined(MSWIN)
                                                                                                   (char_u *)"@,48-57,_,128-167,224-235",
#else
#ifdef EBCDIC
                                                                                                   /* TODO: EBCDIC Check this! @ == isalpha()*/
                                                                                                   (char_u *)"@,240-249,_,66-73,81-89,98-105,"
                                                                                                             "112-120,128,140-142,156,158,172,"
                                                                                                             "174,186,191,203-207,219-225,235-239,"
                                                                                                             "251-254",
#else
                                                                                                   (char_u *)"@,48-57,_,192-255",
#endif
#endif
                                                                                                   (char_u *)0L} SCTX_INIT},
        {"iskeyword", "isk", P_STRING | P_ALLOCED | P_VIM | P_COMMA | P_NODUP, (char_u *)&p_isk, PV_ISK, {
#ifdef EBCDIC
                                                                                                             (char_u *)"@,240-249,_",
                                                                                                             /* TODO: EBCDIC Check this! @ == isalpha()*/
                                                                                                             (char_u *)"@,240-249,_,66-73,81-89,98-105,"
                                                                                                                       "112-120,128,140-142,156,158,172,"
                                                                                                                       "174,186,191,203-207,219-225,235-239,"
                                                                                                                       "251-254",
#else
                                                                                                             (char_u *)"@,48-57,_",
#if defined(MSWIN)
                                                                                                             (char_u *)"@,48-57,_,128-167,224-235"
#else
                                                                                                             ISK_LATIN1
#endif
#endif
                                                                                                         } SCTX_INIT},
        {"isprint", "isp", P_STRING | P_VI_DEF | P_RALL | P_COMMA | P_NODUP, (char_u *)&p_isp, PV_NONE, {
#if defined(MSWIN) || defined(VMS)
                                                                                                            (char_u *)"@,~-255",
#else
#ifdef EBCDIC
                                                                                                            /* all chars above 63 are printable */
                                                                                                            (char_u *)"63-255",
#else
                                                                                                            ISP_LATIN1,
#endif
#endif
                                                                                                            (char_u *)0L} SCTX_INIT},
        {"joinspaces", "js", P_BOOL | P_VI_DEF | P_VIM, (char_u *)&p_js, PV_NONE, {(char_u *)TRUE, (char_u *)0L} SCTX_INIT},
        {"key", NULL, P_STRING | P_ALLOCED | P_VI_DEF | P_NO_MKRC, (char_u *)NULL, PV_NONE, {(char_u *)0L, (char_u *)0L} SCTX_INIT},
        {"keymap", "kmp", P_STRING | P_ALLOCED | P_VI_DEF | P_RBUF | P_RSTAT | P_NFNAME | P_PRI_MKRC,
#ifdef FEAT_KEYMAP
         (char_u *)&p_keymap,
         PV_KMAP,
         {(char_u *)"", (char_u *)0L}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)"", (char_u *)0L}
#endif
         SCTX_INIT},
        {"keymodel", "km", P_STRING | P_VI_DEF | P_ONECOMMA | P_NODUP, (char_u *)&p_km, PV_NONE, {(char_u *)"", (char_u *)0L} SCTX_INIT},
        {"keywordprg", "kp", P_STRING | P_EXPAND | P_VI_DEF | P_SECURE, (char_u *)&p_kp, PV_KP, {
#ifdef MSWIN
                                                                                                    (char_u *)":help",
#else
#ifdef VMS
                                                                                                    (char_u *)"help",
#else
#ifdef USEMAN_S
                                                                                                    (char_u *)"man -s",
#else
                                                                                                    (char_u *)"man",
#endif
#endif
#endif
                                                                                                    (char_u *)0L} SCTX_INIT},
        {"langmap", "lmap", P_STRING | P_VI_DEF | P_ONECOMMA | P_NODUP | P_SECURE,
#ifdef FEAT_LANGMAP
         (char_u *)&p_langmap,
         PV_NONE,
         {(char_u *)"", (char_u *)0L}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)NULL, (char_u *)0L}
#endif
         SCTX_INIT},
        {"langmenu", "lm", P_STRING | P_VI_DEF | P_NFNAME, (char_u *)NULL, PV_NONE, {(char_u *)"", (char_u *)0L} SCTX_INIT},
        {"langnoremap", "lnr", P_BOOL | P_VI_DEF,
#ifdef FEAT_LANGMAP
         (char_u *)&p_lnr,
         PV_NONE,
#else
         (char_u *)NULL,
         PV_NONE,
#endif
         {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"langremap", "lrm", P_BOOL | P_VI_DEF,
#ifdef FEAT_LANGMAP
         (char_u *)&p_lrm,
         PV_NONE,
#else
         (char_u *)NULL,
         PV_NONE,
#endif
         {(char_u *)TRUE, (char_u *)0L} SCTX_INIT},
        {"laststatus", "ls", P_NUM | P_VI_DEF | P_RALL, (char_u *)&p_ls, PV_NONE, {(char_u *)1L, (char_u *)0L} SCTX_INIT},
        {"lazyredraw", "lz", P_BOOL | P_VI_DEF, (char_u *)&p_lz, PV_NONE, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"linebreak", "lbr", P_BOOL | P_VI_DEF | P_RWIN,
#ifdef FEAT_LINEBREAK
         (char_u *)VAR_WIN,
         PV_LBR,
#else
         (char_u *)NULL,
         PV_NONE,
#endif
         {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"lines", NULL, P_NUM | P_NODEFAULT | P_NO_MKRC | P_VI_DEF | P_RCLR, (char_u *)&Rows, PV_NONE, {
#if defined(MSWIN)
                                                                                                           (char_u *)25L,
#else
                                                                                                           (char_u *)24L,
#endif
                                                                                                           (char_u *)0L} SCTX_INIT},
        {"linespace", "lsp", P_NUM | P_VI_DEF | P_RCLR, (char_u *)NULL, PV_NONE, {(char_u *)0L, (char_u *)0L} SCTX_INIT},
        {"lisp", NULL, P_BOOL | P_VI_DEF, (char_u *)NULL, PV_NONE, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"lispwords", "lw", P_STRING | P_VI_DEF | P_ONECOMMA | P_NODUP, (char_u *)NULL, PV_NONE, {(char_u *)"", (char_u *)0L} SCTX_INIT},
        {"list", NULL, P_BOOL | P_VI_DEF | P_RWIN, (char_u *)VAR_WIN, PV_LIST, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"listchars", "lcs", P_STRING | P_VI_DEF | P_RALL | P_ONECOMMA | P_NODUP, (char_u *)&p_lcs, PV_NONE, {(char_u *)"eol:$", (char_u *)0L} SCTX_INIT},
        {"loadplugins", "lpl", P_BOOL | P_VI_DEF, (char_u *)&p_lpl, PV_NONE, {(char_u *)TRUE, (char_u *)0L} SCTX_INIT},
        {"luadll", NULL, P_STRING | P_EXPAND | P_VI_DEF | P_SECURE,
#if defined(DYNAMIC_LUA)
         (char_u *)&p_luadll,
         PV_NONE,
         {(char_u *)DYNAMIC_LUA_DLL, (char_u *)0L}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)"", (char_u *)0L}
#endif
         SCTX_INIT},
        {"macatsui", NULL, P_BOOL | P_VI_DEF | P_RCLR, (char_u *)NULL, PV_NONE, {(char_u *)"", (char_u *)0L} SCTX_INIT},
        {"magic", NULL, P_BOOL | P_VI_DEF, (char_u *)&p_magic, PV_NONE, {(char_u *)TRUE, (char_u *)0L} SCTX_INIT},
        {"makeef", "mef", P_STRING | P_EXPAND | P_VI_DEF | P_SECURE,
#ifdef FEAT_QUICKFIX
         (char_u *)&p_mef,
         PV_NONE,
         {(char_u *)"", (char_u *)0L}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)NULL, (char_u *)0L}
#endif
         SCTX_INIT},
        {"makeencoding", "menc", P_STRING | P_VI_DEF, (char_u *)&p_menc, PV_MENC, {(char_u *)"", (char_u *)0L} SCTX_INIT},
        {"makeprg", "mp", P_STRING | P_EXPAND | P_VI_DEF | P_SECURE,
#ifdef FEAT_QUICKFIX
         (char_u *)&p_mp,
         PV_MP,
#ifdef VMS
         {(char_u *)"MMS", (char_u *)0L}
#else
         {(char_u *)"make", (char_u *)0L}
#endif
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)NULL, (char_u *)0L}
#endif
         SCTX_INIT},
        {"matchpairs", "mps", P_STRING | P_ALLOCED | P_VI_DEF | P_ONECOMMA | P_NODUP, (char_u *)&p_mps, PV_MPS, {(char_u *)"(:),{:},[:]", (char_u *)0L} SCTX_INIT},
        {"matchtime", "mat", P_NUM | P_VI_DEF, (char_u *)&p_mat, PV_NONE, {(char_u *)5L, (char_u *)0L} SCTX_INIT},
        {"maxcombine", "mco", P_NUM | P_VI_DEF | P_CURSWANT, (char_u *)&p_mco, PV_NONE, {(char_u *)2, (char_u *)0L} SCTX_INIT},
        {"maxfuncdepth", "mfd", P_NUM | P_VI_DEF,
#ifdef FEAT_EVAL
         (char_u *)&p_mfd,
         PV_NONE,
#else
         (char_u *)NULL,
         PV_NONE,
#endif
         {(char_u *)100L, (char_u *)0L} SCTX_INIT},
        {"maxmapdepth", "mmd", P_NUM | P_VI_DEF, (char_u *)&p_mmd, PV_NONE, {(char_u *)1000L, (char_u *)0L} SCTX_INIT},
        {"maxmem", "mm", P_NUM | P_VI_DEF, (char_u *)&p_mm, PV_NONE, {(char_u *)DFLT_MAXMEM, (char_u *)0L} SCTX_INIT},
        {"maxmempattern", "mmp", P_NUM | P_VI_DEF, (char_u *)&p_mmp, PV_NONE, {(char_u *)1000L, (char_u *)0L} SCTX_INIT},
        {"maxmemtot", "mmt", P_NUM | P_VI_DEF, (char_u *)&p_mmt, PV_NONE, {(char_u *)DFLT_MAXMEMTOT, (char_u *)0L} SCTX_INIT},
        {"menuitems", "mis", P_NUM | P_VI_DEF, (char_u *)NULL, PV_NONE, {(char_u *)25L, (char_u *)0L} SCTX_INIT},
        {"mesg", NULL, P_BOOL | P_VI_DEF, (char_u *)NULL, PV_NONE, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"mkspellmem", "msm", P_STRING | P_VI_DEF | P_EXPAND | P_SECURE, (char_u *)NULL, PV_NONE, {(char_u *)0L, (char_u *)0L} SCTX_INIT},
        {"modeline", "ml", P_BOOL | P_VIM, (char_u *)&p_ml, PV_ML, {(char_u *)FALSE, (char_u *)TRUE} SCTX_INIT},
        {"modelineexpr", "mle", P_BOOL | P_VI_DEF | P_SECURE, (char_u *)&p_mle, PV_NONE, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"modelines", "mls", P_NUM | P_VI_DEF, (char_u *)&p_mls, PV_NONE, {(char_u *)5L, (char_u *)0L} SCTX_INIT},
        {"modifiable", "ma", P_BOOL | P_VI_DEF | P_NOGLOB, (char_u *)&p_ma, PV_MA, {(char_u *)TRUE, (char_u *)0L} SCTX_INIT},
        {"modified", "mod", P_BOOL | P_NO_MKRC | P_VI_DEF | P_RSTAT, (char_u *)&p_mod, PV_MOD, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"more", NULL, P_BOOL | P_VIM, (char_u *)&p_more, PV_NONE, {(char_u *)FALSE, (char_u *)TRUE} SCTX_INIT},
        {"mouse", NULL, P_STRING | P_VI_DEF | P_FLAGLIST, (char_u *)&p_mouse, PV_NONE, {
#if defined(MSWIN)
                                                                                           (char_u *)"a",
#else
                                                                                           (char_u *)"",
#endif
                                                                                           (char_u *)0L} SCTX_INIT},
        {"mousefocus", "mousef", P_BOOL | P_VI_DEF, (char_u *)NULL, PV_NONE, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"mousehide", "mh", P_BOOL | P_VI_DEF, (char_u *)NULL, PV_NONE, {(char_u *)TRUE, (char_u *)0L} SCTX_INIT},
        {"mousemodel", "mousem", P_STRING | P_VI_DEF, (char_u *)&p_mousem, PV_NONE, {
#if defined(MSWIN)
                                                                                        (char_u *)"popup",
#else
#if defined(MACOS_X)
                                                                                        (char_u *)"popup_setpos",
#else
                                                                                        (char_u *)"extend",
#endif
#endif
                                                                                        (char_u *)0L} SCTX_INIT},
        {"mouseshape", "mouses", P_STRING | P_VI_DEF | P_ONECOMMA | P_NODUP, (char_u *)NULL, PV_NONE, {(char_u *)NULL, (char_u *)0L} SCTX_INIT},
        {"mousetime", "mouset", P_NUM | P_VI_DEF, (char_u *)&p_mouset, PV_NONE, {(char_u *)500L, (char_u *)0L} SCTX_INIT},
        {"mzschemedll", NULL, P_STRING | P_EXPAND | P_VI_DEF | P_SECURE,
#if defined(DYNAMIC_MZSCHEME)
         (char_u *)&p_mzschemedll,
         PV_NONE,
         {(char_u *)DYNAMIC_MZSCH_DLL, (char_u *)0L}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)"", (char_u *)0L}
#endif
         SCTX_INIT},
        {"mzschemegcdll", NULL, P_STRING | P_EXPAND | P_VI_DEF | P_SECURE,
#if defined(DYNAMIC_MZSCHEME)
         (char_u *)&p_mzschemegcdll,
         PV_NONE,
         {(char_u *)DYNAMIC_MZGC_DLL, (char_u *)0L}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)"", (char_u *)0L}
#endif
         SCTX_INIT},
        {"mzquantum", "mzq", P_NUM,
#ifdef FEAT_MZSCHEME
         (char_u *)&p_mzq,
         PV_NONE,
#else
         (char_u *)NULL,
         PV_NONE,
#endif
         {(char_u *)100L, (char_u *)100L} SCTX_INIT},
        {"novice", NULL, P_BOOL | P_VI_DEF, (char_u *)NULL, PV_NONE, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"nrformats", "nf", P_STRING | P_ALLOCED | P_VI_DEF | P_ONECOMMA | P_NODUP, (char_u *)&p_nf, PV_NF, {(char_u *)"bin,octal,hex", (char_u *)0L} SCTX_INIT},
        {"number", "nu", P_BOOL | P_VI_DEF | P_RWIN, (char_u *)VAR_WIN, PV_NU, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"numberwidth", "nuw", P_NUM | P_RWIN | P_VIM,
#ifdef FEAT_LINEBREAK
         (char_u *)VAR_WIN,
         PV_NUW,
#else
         (char_u *)NULL,
         PV_NONE,
#endif
         {(char_u *)8L, (char_u *)4L} SCTX_INIT},
        {"omnifunc", "ofu", P_STRING | P_ALLOCED | P_VI_DEF | P_SECURE, (char_u *)NULL, PV_NONE, {(char_u *)0L, (char_u *)0L} SCTX_INIT},
        {"open", NULL, P_BOOL | P_VI_DEF, (char_u *)NULL, PV_NONE, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"opendevice", "odev", P_BOOL | P_VI_DEF,
#if defined(MSWIN)
         (char_u *)&p_odev,
         PV_NONE,
#else
         (char_u *)NULL,
         PV_NONE,
#endif
         {(char_u *)FALSE, (char_u *)FALSE} SCTX_INIT},
        {"operatorfunc", "opfunc", P_STRING | P_VI_DEF | P_SECURE, (char_u *)&p_opfunc, PV_NONE, {(char_u *)"", (char_u *)0L} SCTX_INIT},
        {"optimize", "opt", P_BOOL | P_VI_DEF, (char_u *)NULL, PV_NONE, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"osfiletype", "oft", P_STRING | P_ALLOCED | P_VI_DEF, (char_u *)NULL, PV_NONE, {(char_u *)0L, (char_u *)0L} SCTX_INIT},
        {"packpath", "pp", P_STRING | P_VI_DEF | P_EXPAND | P_ONECOMMA | P_NODUP | P_SECURE, (char_u *)&p_pp, PV_NONE, {(char_u *)DFLT_RUNTIMEPATH, (char_u *)0L} SCTX_INIT},
        {"paragraphs", "para", P_STRING | P_VI_DEF, (char_u *)&p_para, PV_NONE, {(char_u *)"IPLPPPQPP TPHPLIPpLpItpplpipbp", (char_u *)0L} SCTX_INIT},
        {"paste", NULL, P_BOOL | P_VI_DEF | P_PRI_MKRC, (char_u *)&p_paste, PV_NONE, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"pastetoggle", "pt", P_STRING | P_VI_DEF, (char_u *)&p_pt, PV_NONE, {(char_u *)"", (char_u *)0L} SCTX_INIT},
        {"patchexpr", "pex", P_STRING | P_VI_DEF | P_SECURE,
#if defined(FEAT_DIFF) && defined(FEAT_EVAL)
         (char_u *)&p_pex,
         PV_NONE,
         {(char_u *)"", (char_u *)0L}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)0L, (char_u *)0L}
#endif
         SCTX_INIT},
        {"patchmode", "pm", P_STRING | P_VI_DEF | P_NFNAME, (char_u *)&p_pm, PV_NONE, {(char_u *)"", (char_u *)0L} SCTX_INIT},
        {"path", "pa", P_STRING | P_EXPAND | P_VI_DEF | P_COMMA | P_NODUP, (char_u *)&p_path, PV_PATH, {
#if defined(MSWIN)
                                                                                                           (char_u *)".,,",
#else
                                                                                                           (char_u *)".,/usr/include,,",
#endif
                                                                                                           (char_u *)0L} SCTX_INIT},
        {"perldll", NULL, P_STRING | P_EXPAND | P_VI_DEF | P_SECURE,
#if defined(DYNAMIC_PERL)
         (char_u *)&p_perldll,
         PV_NONE,
         {(char_u *)DYNAMIC_PERL_DLL, (char_u *)0L}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)0L, (char_u *)0L}
#endif
         SCTX_INIT},
        {"preserveindent", "pi", P_BOOL | P_VI_DEF | P_VIM, (char_u *)&p_pi, PV_PI, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"previewheight", "pvh", P_NUM | P_VI_DEF,
#if defined(FEAT_QUICKFIX)
         (char_u *)&p_pvh,
         PV_NONE,
#else
         (char_u *)NULL,
         PV_NONE,
#endif
         {(char_u *)12L, (char_u *)0L} SCTX_INIT},
        {"previewwindow", "pvw", P_BOOL | P_VI_DEF | P_RSTAT | P_NOGLOB,
#if defined(FEAT_QUICKFIX)
         (char_u *)VAR_WIN,
         PV_PVW,
#else
         (char_u *)NULL,
         PV_NONE,
#endif
         {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"printdevice", "pdev", P_STRING | P_VI_DEF | P_SECURE, (char_u *)NULL, PV_NONE, {(char_u *)NULL, (char_u *)0L} SCTX_INIT},
        {"printencoding", "penc", P_STRING | P_VI_DEF,
#ifdef FEAT_POSTSCRIPT
         (char_u *)&p_penc,
         PV_NONE,
         {(char_u *)"", (char_u *)0L}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)NULL, (char_u *)0L}
#endif
         SCTX_INIT},
        {"printexpr", "pexpr", P_STRING | P_VI_DEF | P_SECURE,
#ifdef FEAT_POSTSCRIPT
         (char_u *)&p_pexpr,
         PV_NONE,
         {(char_u *)"", (char_u *)0L}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)NULL, (char_u *)0L}
#endif
         SCTX_INIT},
        {"printfont", "pfn", P_STRING | P_VI_DEF, (char_u *)NULL, PV_NONE, {(char_u *)NULL, (char_u *)0L} SCTX_INIT},
        {"printheader", "pheader", P_STRING | P_VI_DEF | P_GETTEXT, (char_u *)NULL, PV_NONE, {(char_u *)NULL, (char_u *)0L} SCTX_INIT},
        {"printmbcharset", "pmbcs", P_STRING | P_VI_DEF,
#if defined(FEAT_POSTSCRIPT)
         (char_u *)&p_pmcs,
         PV_NONE,
         {(char_u *)"", (char_u *)0L}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)NULL, (char_u *)0L}
#endif
         SCTX_INIT},
        {"printmbfont", "pmbfn", P_STRING | P_VI_DEF,
#if defined(FEAT_POSTSCRIPT)
         (char_u *)&p_pmfn,
         PV_NONE,
         {(char_u *)"", (char_u *)0L}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)NULL, (char_u *)0L}
#endif
         SCTX_INIT},
        {"printoptions", "popt", P_STRING | P_VI_DEF | P_ONECOMMA | P_NODUP, (char_u *)NULL, PV_NONE, {(char_u *)NULL, (char_u *)0L} SCTX_INIT},
        {"prompt", NULL, P_BOOL | P_VI_DEF, (char_u *)&p_prompt, PV_NONE, {(char_u *)TRUE, (char_u *)0L} SCTX_INIT},
        {"pumheight", "ph", P_NUM | P_VI_DEF, (char_u *)NULL, PV_NONE, {(char_u *)0L, (char_u *)0L} SCTX_INIT},
        {"pumwidth", "pw", P_NUM | P_VI_DEF, (char_u *)NULL, PV_NONE, {(char_u *)15L, (char_u *)15L} SCTX_INIT},
        {"pythonthreedll", NULL, P_STRING | P_EXPAND | P_VI_DEF | P_SECURE,
#if defined(DYNAMIC_PYTHON3)
         (char_u *)&p_py3dll,
         PV_NONE,
         {(char_u *)DYNAMIC_PYTHON3_DLL, (char_u *)0L}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)NULL, (char_u *)0L}
#endif
         SCTX_INIT},
        {"pythonthreehome", NULL, P_STRING | P_EXPAND | P_VI_DEF | P_SECURE,
#if defined(FEAT_PYTHON3)
         (char_u *)&p_py3home,
         PV_NONE,
         {(char_u *)"", (char_u *)0L}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)NULL, (char_u *)0L}
#endif
         SCTX_INIT},
        {"pythondll", NULL, P_STRING | P_EXPAND | P_VI_DEF | P_SECURE,
#if defined(DYNAMIC_PYTHON)
         (char_u *)&p_pydll,
         PV_NONE,
         {(char_u *)DYNAMIC_PYTHON_DLL, (char_u *)0L}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)NULL, (char_u *)0L}
#endif
         SCTX_INIT},
        {"pythonhome", NULL, P_STRING | P_EXPAND | P_VI_DEF | P_SECURE,
#if defined(FEAT_PYTHON)
         (char_u *)&p_pyhome,
         PV_NONE,
         {(char_u *)"", (char_u *)0L}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)NULL, (char_u *)0L}
#endif
         SCTX_INIT},
        {"pyxversion", "pyx", P_NUM | P_VI_DEF | P_SECURE,
#if defined(FEAT_PYTHON) || defined(FEAT_PYTHON3)
         (char_u *)&p_pyx,
         PV_NONE,
#else
         (char_u *)NULL,
         PV_NONE,
#endif
         {(char_u *)DEFAULT_PYTHON_VER, (char_u *)0L} SCTX_INIT},
        {"quoteescape", "qe", P_STRING | P_ALLOCED | P_VI_DEF,
#ifdef FEAT_TEXTOBJ
         (char_u *)&p_qe,
         PV_QE,
         {(char_u *)"\\", (char_u *)0L}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)NULL, (char_u *)0L}
#endif
         SCTX_INIT},
        {"readonly", "ro", P_BOOL | P_VI_DEF | P_RSTAT | P_NOGLOB, (char_u *)&p_ro, PV_RO, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"redraw", NULL, P_BOOL | P_VI_DEF, (char_u *)NULL, PV_NONE, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"redrawtime", "rdt", P_NUM | P_VI_DEF,
#ifdef FEAT_RELTIME
         (char_u *)&p_rdt,
         PV_NONE,
#else
         (char_u *)NULL,
         PV_NONE,
#endif
         {(char_u *)2000L, (char_u *)0L} SCTX_INIT},
        {"regexpengine", "re", P_NUM | P_VI_DEF, (char_u *)&p_re, PV_NONE, {(char_u *)0L, (char_u *)0L} SCTX_INIT},
        {"relativenumber", "rnu", P_BOOL | P_VI_DEF | P_RWIN, (char_u *)VAR_WIN, PV_RNU, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"remap", NULL, P_BOOL | P_VI_DEF, (char_u *)&p_remap, PV_NONE, {(char_u *)TRUE, (char_u *)0L} SCTX_INIT},
        {"renderoptions", "rop", P_STRING | P_ONECOMMA | P_RCLR | P_VI_DEF,
#ifdef FEAT_RENDER_OPTIONS
         (char_u *)&p_rop,
         PV_NONE,
         {(char_u *)"", (char_u *)0L}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)NULL, (char_u *)0L}
#endif
         SCTX_INIT},
        {"report", NULL, P_NUM | P_VI_DEF, (char_u *)&p_report, PV_NONE, {(char_u *)2L, (char_u *)0L} SCTX_INIT},
        {"restorescreen", "rs", P_BOOL | P_VI_DEF,
#ifdef MSWIN
         (char_u *)&p_rs,
         PV_NONE,
#else
         (char_u *)NULL,
         PV_NONE,
#endif
         {(char_u *)TRUE, (char_u *)0L} SCTX_INIT},
        {"revins", "ri", P_BOOL | P_VI_DEF | P_VIM,
#ifdef FEAT_RIGHTLEFT
         (char_u *)&p_ri,
         PV_NONE,
#else
         (char_u *)NULL,
         PV_NONE,
#endif
         {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"rightleft", "rl", P_BOOL | P_VI_DEF | P_RWIN,
#ifdef FEAT_RIGHTLEFT
         (char_u *)VAR_WIN,
         PV_RL,
#else
         (char_u *)NULL,
         PV_NONE,
#endif
         {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"rightleftcmd", "rlc", P_STRING | P_ALLOCED | P_VI_DEF | P_RWIN,
#ifdef FEAT_RIGHTLEFT
         (char_u *)VAR_WIN,
         PV_RLC,
         {(char_u *)"search", (char_u *)NULL}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)NULL, (char_u *)0L}
#endif
         SCTX_INIT},
        {"rubydll", NULL, P_STRING | P_EXPAND | P_VI_DEF | P_SECURE,
#if defined(DYNAMIC_RUBY)
         (char_u *)&p_rubydll,
         PV_NONE,
         {(char_u *)DYNAMIC_RUBY_DLL, (char_u *)0L}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)NULL, (char_u *)0L}
#endif
         SCTX_INIT},
        {"ruler", "ru", P_BOOL | P_VI_DEF | P_VIM | P_RSTAT, (char_u *)NULL, PV_NONE, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"rulerformat", "ruf", P_STRING | P_VI_DEF | P_ALLOCED | P_RSTAT | P_MLE, (char_u *)NULL, PV_NONE, {(char_u *)"", (char_u *)0L} SCTX_INIT},
        {"runtimepath", "rtp", P_STRING | P_VI_DEF | P_EXPAND | P_ONECOMMA | P_NODUP | P_SECURE, (char_u *)&p_rtp, PV_NONE, {(char_u *)DFLT_RUNTIMEPATH, (char_u *)0L} SCTX_INIT},
        {"scroll", "scr", P_NUM | P_NO_MKRC | P_VI_DEF, (char_u *)VAR_WIN, PV_SCROLL, {(char_u *)0L, (char_u *)0L} SCTX_INIT},
        {"scrollbind", "scb", P_BOOL | P_VI_DEF, (char_u *)VAR_WIN, PV_SCBIND, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"scrolljump", "sj", P_NUM | P_VI_DEF | P_VIM, (char_u *)&p_sj, PV_NONE, {(char_u *)1L, (char_u *)0L} SCTX_INIT},
        {"scrolloff", "so", P_NUM | P_VI_DEF | P_VIM | P_RALL, (char_u *)&p_so, PV_SO, {(char_u *)0L, (char_u *)0L} SCTX_INIT},
        {"scrollopt", "sbo", P_STRING | P_VI_DEF | P_ONECOMMA | P_NODUP, (char_u *)&p_sbo, PV_NONE, {(char_u *)"ver,jump", (char_u *)0L} SCTX_INIT},
        {"sections", "sect", P_STRING | P_VI_DEF, (char_u *)&p_sections, PV_NONE, {(char_u *)"SHNHH HUnhsh", (char_u *)0L} SCTX_INIT},
        {"secure", NULL, P_BOOL | P_VI_DEF | P_SECURE, (char_u *)&p_secure, PV_NONE, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"selection", "sel", P_STRING | P_VI_DEF, (char_u *)&p_sel, PV_NONE, {(char_u *)"inclusive", (char_u *)0L} SCTX_INIT},
        {"selectmode", "slm", P_STRING | P_VI_DEF | P_ONECOMMA | P_NODUP, (char_u *)&p_slm, PV_NONE, {(char_u *)"", (char_u *)0L} SCTX_INIT},
        {"sessionoptions", "ssop", P_STRING | P_VI_DEF | P_ONECOMMA | P_NODUP,
#ifdef FEAT_SESSION
         (char_u *)&p_ssop,
         PV_NONE,
         {(char_u *)"blank,buffers,curdir,folds,help,options,tabpages,winsize,terminal", (char_u *)0L}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)0L, (char_u *)0L}
#endif
         SCTX_INIT},
        {"shell", "sh", P_STRING | P_EXPAND | P_VI_DEF | P_SECURE, (char_u *)&p_sh, PV_NONE, {
#ifdef VMS
                                                                                                 (char_u *)"-",
#else
#if defined(MSWIN)
                                                                                                 (char_u *)"", /* set in set_init_1() */
#else
                                                                                                 (char_u *)"sh",
#endif
#endif /* VMS */
                                                                                                 (char_u *)0L} SCTX_INIT},
        {"shellcmdflag", "shcf", P_STRING | P_VI_DEF | P_SECURE, (char_u *)&p_shcf, PV_NONE, {
#if defined(MSWIN)
                                                                                                 (char_u *)"/c",
#else
                                                                                                 (char_u *)"-c",
#endif
                                                                                                 (char_u *)0L} SCTX_INIT},
        {"shellpipe", "sp", P_STRING | P_VI_DEF | P_SECURE,
#ifdef FEAT_QUICKFIX
         (char_u *)&p_sp,
         PV_NONE,
         {
#if defined(UNIX)
             (char_u *)"| tee",
#else
             (char_u *)">",
#endif
             (char_u *)0L}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)0L, (char_u *)0L}
#endif
         SCTX_INIT},
        {"shellquote", "shq", P_STRING | P_VI_DEF | P_SECURE, (char_u *)&p_shq, PV_NONE, {(char_u *)"", (char_u *)0L} SCTX_INIT},
        {"shellredir", "srr", P_STRING | P_VI_DEF | P_SECURE, (char_u *)&p_srr, PV_NONE, {(char_u *)">", (char_u *)0L} SCTX_INIT},
        {"shellslash", "ssl", P_BOOL | P_VI_DEF,
#ifdef BACKSLASH_IN_FILENAME
         (char_u *)&p_ssl,
         PV_NONE,
#else
         (char_u *)NULL,
         PV_NONE,
#endif
         {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"shelltemp", "stmp", P_BOOL, (char_u *)&p_stmp, PV_NONE, {(char_u *)FALSE, (char_u *)TRUE} SCTX_INIT},
        {"shelltype", "st", P_NUM | P_VI_DEF, (char_u *)NULL, PV_NONE, {(char_u *)0L, (char_u *)0L} SCTX_INIT},
        {"shellxquote", "sxq", P_STRING | P_VI_DEF | P_SECURE, (char_u *)&p_sxq, PV_NONE, {
#if defined(UNIX) && defined(USE_SYSTEM)
                                                                                              (char_u *)"\"",
#else
                                                                                              (char_u *)"",
#endif
                                                                                              (char_u *)0L} SCTX_INIT},
        {"shellxescape", "sxe", P_STRING | P_VI_DEF | P_SECURE, (char_u *)&p_sxe, PV_NONE, {
#if defined(MSWIN)
                                                                                               (char_u *)"\"&|<>()@^",
#else
                                                                                               (char_u *)"",
#endif
                                                                                               (char_u *)0L} SCTX_INIT},
        {"shiftround", "sr", P_BOOL | P_VI_DEF | P_VIM, (char_u *)&p_sr, PV_NONE, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"shiftwidth", "sw", P_NUM | P_VI_DEF, (char_u *)&p_sw, PV_SW, {(char_u *)8L, (char_u *)0L} SCTX_INIT},
        {"shortmess", "shm", P_STRING | P_VIM | P_FLAGLIST, (char_u *)&p_shm, PV_NONE, {(char_u *)"S", (char_u *)"filnxtToOS"} SCTX_INIT},
        {"shortname", "sn", P_BOOL | P_VI_DEF, (char_u *)&p_sn, PV_SN, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"showbreak", "sbr", P_STRING | P_VI_DEF | P_RALL,
#ifdef FEAT_LINEBREAK
         (char_u *)&p_sbr,
         PV_NONE,
#else
         (char_u *)NULL,
         PV_NONE,
#endif
         {(char_u *)"", (char_u *)0L} SCTX_INIT},
        {"showcmd", "sc", P_BOOL | P_VIM, (char_u *)NULL, PV_NONE, {(char_u *)FALSE,
#ifdef UNIX
                                                                    (char_u *)FALSE
#else
                                                                    (char_u *)TRUE
#endif
                                                                   } SCTX_INIT},
        {"showfulltag", "sft", P_BOOL | P_VI_DEF, (char_u *)&p_sft, PV_NONE, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"showmatch", "sm", P_BOOL | P_VI_DEF, (char_u *)&p_sm, PV_NONE, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"showmode", "smd", P_BOOL | P_VIM, (char_u *)&p_smd, PV_NONE, {(char_u *)FALSE, (char_u *)TRUE} SCTX_INIT},
        {"showtabline", "stal", P_NUM | P_VI_DEF | P_RALL, (char_u *)&p_stal, PV_NONE, {(char_u *)1L, (char_u *)0L} SCTX_INIT},
        {"sidescroll", "ss", P_NUM | P_VI_DEF, (char_u *)&p_ss, PV_NONE, {(char_u *)1L, (char_u *)0L} SCTX_INIT},
        {"sidescrolloff", "siso", P_NUM | P_VI_DEF | P_VIM | P_RBUF, (char_u *)&p_siso, PV_SISO, {(char_u *)0L, (char_u *)0L} SCTX_INIT},
        {"signcolumn", "scl", P_STRING | P_ALLOCED | P_VI_DEF | P_RWIN,
#ifdef FEAT_SIGNS
         (char_u *)VAR_WIN,
         PV_SCL,
         {(char_u *)"auto", (char_u *)0L}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)NULL, (char_u *)0L}
#endif
         SCTX_INIT},
        {"slowopen", "slow", P_BOOL | P_VI_DEF, (char_u *)NULL, PV_NONE, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"smartcase", "scs", P_BOOL | P_VI_DEF | P_VIM, (char_u *)&p_scs, PV_NONE, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"smartindent", "si", P_BOOL | P_VI_DEF | P_VIM,
#ifdef FEAT_SMARTINDENT
         (char_u *)&p_si,
         PV_SI,
#else
         (char_u *)NULL,
         PV_NONE,
#endif
         {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"smarttab", "sta", P_BOOL | P_VI_DEF | P_VIM, (char_u *)&p_sta, PV_NONE, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"softtabstop", "sts", P_NUM | P_VI_DEF | P_VIM, (char_u *)&p_sts, PV_STS, {(char_u *)0L, (char_u *)0L} SCTX_INIT},
        {"sourceany", NULL, P_BOOL | P_VI_DEF, (char_u *)NULL, PV_NONE, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"spell", NULL, P_BOOL | P_VI_DEF | P_RWIN, (char_u *)NULL, PV_NONE, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"spellcapcheck", "spc", P_STRING | P_ALLOCED | P_VI_DEF | P_RBUF, (char_u *)NULL, PV_NONE, {(char_u *)0L, (char_u *)0L} SCTX_INIT},
        {"spellfile", "spf", P_STRING | P_EXPAND | P_ALLOCED | P_VI_DEF | P_SECURE | P_ONECOMMA, (char_u *)NULL, PV_NONE, {(char_u *)0L, (char_u *)0L} SCTX_INIT},
        {"spelllang", "spl", P_STRING | P_ALLOCED | P_VI_DEF | P_ONECOMMA | P_RBUF | P_EXPAND, (char_u *)NULL, PV_NONE, {(char_u *)0L, (char_u *)0L} SCTX_INIT},
        {"spellsuggest", "sps", P_STRING | P_VI_DEF | P_EXPAND | P_SECURE | P_ONECOMMA, (char_u *)NULL, PV_NONE, {(char_u *)0L, (char_u *)0L} SCTX_INIT},
        {"splitbelow", "sb", P_BOOL | P_VI_DEF, (char_u *)&p_sb, PV_NONE, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"splitright", "spr", P_BOOL | P_VI_DEF, (char_u *)&p_spr, PV_NONE, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"startofline", "sol", P_BOOL | P_VI_DEF | P_VIM, (char_u *)&p_sol, PV_NONE, {(char_u *)TRUE, (char_u *)0L} SCTX_INIT},
        {"statusline", "stl", P_STRING | P_VI_DEF | P_ALLOCED | P_RSTAT | P_MLE, (char_u *)NULL, PV_NONE, {(char_u *)"", (char_u *)0L} SCTX_INIT},
        {"suffixes", "su", P_STRING | P_VI_DEF | P_ONECOMMA | P_NODUP, (char_u *)&p_su, PV_NONE, {(char_u *)".bak,~,.o,.h,.info,.swp,.obj", (char_u *)0L} SCTX_INIT},
        {"suffixesadd", "sua", P_STRING | P_VI_DEF | P_ALLOCED | P_ONECOMMA | P_NODUP,
#ifdef FEAT_SEARCHPATH
         (char_u *)&p_sua,
         PV_SUA,
         {(char_u *)"", (char_u *)0L}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)0L, (char_u *)0L}
#endif
         SCTX_INIT},
        {"swapfile", "swf", P_BOOL | P_VI_DEF | P_RSTAT, (char_u *)&p_swf, PV_SWF, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"swapsync", "sws", P_STRING | P_VI_DEF, (char_u *)&p_sws, PV_NONE, {(char_u *)"fsync", (char_u *)0L} SCTX_INIT},
        {"switchbuf", "swb", P_STRING | P_VI_DEF | P_ONECOMMA | P_NODUP, (char_u *)&p_swb, PV_NONE, {(char_u *)"", (char_u *)0L} SCTX_INIT},
        {"synmaxcol", "smc", P_NUM | P_VI_DEF | P_RBUF, (char_u *)NULL, PV_NONE, {(char_u *)0L, (char_u *)0L} SCTX_INIT},
        {"syntax", "syn", P_STRING | P_ALLOCED | P_VI_DEF | P_NOGLOB | P_NFNAME, (char_u *)NULL, PV_NONE, {(char_u *)0L, (char_u *)0L} SCTX_INIT},
        {"tabline", "tal", P_STRING | P_VI_DEF | P_RALL | P_MLE, (char_u *)NULL, PV_NONE, {(char_u *)"", (char_u *)0L} SCTX_INIT},
        {"tabpagemax", "tpm", P_NUM | P_VI_DEF, (char_u *)&p_tpm, PV_NONE, {(char_u *)10L, (char_u *)0L} SCTX_INIT},
        {"tabstop", "ts", P_NUM | P_VI_DEF | P_RBUF, (char_u *)&p_ts, PV_TS, {(char_u *)8L, (char_u *)0L} SCTX_INIT},
        {"tagbsearch", "tbs", P_BOOL | P_VI_DEF, (char_u *)&p_tbs, PV_NONE,
#ifdef VMS /* binary searching doesn't appear to work on VMS */
         {(char_u *)0L, (char_u *)0L}
#else
         {(char_u *)TRUE, (char_u *)0L}
#endif
         SCTX_INIT},
        {"tagcase", "tc", P_STRING | P_VIM, (char_u *)&p_tc, PV_TC, {(char_u *)"followic", (char_u *)"followic"} SCTX_INIT},
        {"tagfunc", "tfu", P_STRING | P_ALLOCED | P_VI_DEF | P_SECURE,
#ifdef FEAT_EVAL
         (char_u *)&p_tfu,
         PV_TFU,
         {(char_u *)"", (char_u *)0L}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)0L, (char_u *)0L}
#endif
         SCTX_INIT},
        {"taglength", "tl", P_NUM | P_VI_DEF, (char_u *)&p_tl, PV_NONE, {(char_u *)0L, (char_u *)0L} SCTX_INIT},
        {"tagrelative", "tr", P_BOOL | P_VIM, (char_u *)&p_tr, PV_NONE, {(char_u *)FALSE, (char_u *)TRUE} SCTX_INIT},
        {"tags", "tag", P_STRING | P_EXPAND | P_VI_DEF | P_ONECOMMA | P_NODUP, (char_u *)&p_tags, PV_TAGS, {
#if defined(FEAT_EMACS_TAGS) && !defined(CASE_INSENSITIVE_FILENAME)
                                                                                                               (char_u *)"./tags,./TAGS,tags,TAGS",
#else
                                                                                                               (char_u *)"./tags,tags",
#endif
                                                                                                               (char_u *)0L} SCTX_INIT},
        {"tagstack", "tgst", P_BOOL | P_VI_DEF, (char_u *)&p_tgst, PV_NONE, {(char_u *)TRUE, (char_u *)0L} SCTX_INIT},
        {"tcldll", NULL, P_STRING | P_EXPAND | P_VI_DEF | P_SECURE,
#if defined(DYNAMIC_TCL)
         (char_u *)&p_tcldll,
         PV_NONE,
         {(char_u *)DYNAMIC_TCL_DLL, (char_u *)0L}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)0L, (char_u *)0L}
#endif
         SCTX_INIT},
        {"term", NULL, P_STRING | P_EXPAND | P_NODEFAULT | P_NO_MKRC | P_VI_DEF | P_RALL, (char_u *)&T_NAME, PV_NONE, {(char_u *)"", (char_u *)0L} SCTX_INIT},
        {"termbidi", "tbidi", P_BOOL | P_VI_DEF,
#ifdef FEAT_ARABIC
         (char_u *)&p_tbidi,
         PV_NONE,
#else
         (char_u *)NULL,
         PV_NONE,
#endif
         {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"termencoding", "tenc", P_STRING | P_VI_DEF | P_RCLR, (char_u *)&p_tenc, PV_NONE, {(char_u *)"", (char_u *)0L} SCTX_INIT},
        {"termguicolors", "tgc", P_BOOL | P_VI_DEF | P_VIM | P_RCLR, (char_u *)NULL, PV_NONE, {(char_u *)FALSE, (char_u *)FALSE} SCTX_INIT},
        {"termwinkey", "twk", P_STRING | P_ALLOCED | P_RWIN | P_VI_DEF,
#ifdef FEAT_TERMINAL
         (char_u *)VAR_WIN,
         PV_TWK,
         {(char_u *)"", (char_u *)NULL}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)NULL, (char_u *)0L}
#endif
         SCTX_INIT},
        {"termwinscroll", "twsl", P_NUM | P_VI_DEF | P_VIM | P_RBUF,
#ifdef FEAT_TERMINAL
         (char_u *)&p_twsl,
         PV_TWSL,
         {(char_u *)10000L, (char_u *)10000L}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)NULL, (char_u *)0L}
#endif
         SCTX_INIT},
        {"termwinsize", "tws", P_STRING | P_ALLOCED | P_RWIN | P_VI_DEF,
#ifdef FEAT_TERMINAL
         (char_u *)VAR_WIN,
         PV_TWS,
         {(char_u *)"", (char_u *)NULL}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)NULL, (char_u *)0L}
#endif
         SCTX_INIT},
        {"termwintype", "twt", P_STRING | P_ALLOCED | P_VI_DEF,
#if defined(MSWIN) && defined(FEAT_TERMINAL)
         (char_u *)&p_twt,
         PV_NONE,
         {(char_u *)"", (char_u *)NULL}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)NULL, (char_u *)0L}
#endif
         SCTX_INIT},
        {"terse", NULL, P_BOOL | P_VI_DEF, (char_u *)&p_terse, PV_NONE, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"textauto", "ta", P_BOOL | P_VIM, (char_u *)&p_ta, PV_NONE, {(char_u *)DFLT_TEXTAUTO, (char_u *)TRUE} SCTX_INIT},
        {"textmode", "tx", P_BOOL | P_VI_DEF | P_NO_MKRC, (char_u *)&p_tx, PV_TX, {
#ifdef USE_CRNL
                                                                                      (char_u *)TRUE,
#else
                                                                                      (char_u *)FALSE,
#endif
                                                                                      (char_u *)0L} SCTX_INIT},
        {"textwidth", "tw", P_NUM | P_VI_DEF | P_VIM | P_RBUF, (char_u *)&p_tw, PV_TW, {(char_u *)0L, (char_u *)0L} SCTX_INIT},
        {"thesaurus", "tsr", P_STRING | P_EXPAND | P_VI_DEF | P_ONECOMMA | P_NODUP | P_NDNAME, (char_u *)NULL, PV_NONE, {(char_u *)"", (char_u *)0L} SCTX_INIT},
        {"tildeop", "top", P_BOOL | P_VI_DEF | P_VIM, (char_u *)&p_to, PV_NONE, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"timeout", "to", P_BOOL | P_VI_DEF, (char_u *)&p_timeout, PV_NONE, {(char_u *)TRUE, (char_u *)0L} SCTX_INIT},
        {"timeoutlen", "tm", P_NUM | P_VI_DEF, (char_u *)&p_tm, PV_NONE, {(char_u *)1000L, (char_u *)0L} SCTX_INIT},
        {"title", NULL, P_BOOL | P_VI_DEF, (char_u *)NULL, PV_NONE, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"titlelen", NULL, P_NUM | P_VI_DEF, (char_u *)NULL, PV_NONE, {(char_u *)85L, (char_u *)0L} SCTX_INIT},
        {"titleold", NULL, P_STRING | P_VI_DEF | P_GETTEXT | P_SECURE | P_NO_MKRC, (char_u *)NULL, PV_NONE, {(char_u *)0L, (char_u *)0L} SCTX_INIT},
        {"titlestring", NULL, P_STRING | P_VI_DEF | P_MLE, (char_u *)NULL, PV_NONE, {(char_u *)"", (char_u *)0L} SCTX_INIT},
        {"toolbar", "tb", P_STRING | P_ONECOMMA | P_VI_DEF | P_NODUP,
#if defined(FEAT_TOOLBAR)
         (char_u *)&p_toolbar,
         PV_NONE,
         {(char_u *)"icons,tooltips", (char_u *)0L}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)0L, (char_u *)0L}
#endif
         SCTX_INIT},
        {"toolbariconsize", "tbis", P_STRING | P_VI_DEF, (char_u *)NULL, PV_NONE, {(char_u *)0L, (char_u *)0L} SCTX_INIT},
        {"ttimeout", NULL, P_BOOL | P_VI_DEF | P_VIM, (char_u *)&p_ttimeout, PV_NONE, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"ttimeoutlen", "ttm", P_NUM | P_VI_DEF, (char_u *)&p_ttm, PV_NONE, {(char_u *)-1L, (char_u *)0L} SCTX_INIT},
        {"ttybuiltin", "tbi", P_BOOL | P_VI_DEF, (char_u *)&p_tbi, PV_NONE, {(char_u *)TRUE, (char_u *)0L} SCTX_INIT},
        {"ttyfast", "tf", P_BOOL | P_NO_MKRC | P_VI_DEF, (char_u *)&p_tf, PV_NONE, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"ttymouse", "ttym", P_STRING | P_NODEFAULT | P_NO_MKRC | P_VI_DEF, (char_u *)NULL, PV_NONE, {(char_u *)"", (char_u *)0L} SCTX_INIT},
        {"ttyscroll", "tsl", P_NUM | P_VI_DEF, (char_u *)&p_ttyscroll, PV_NONE, {(char_u *)999L, (char_u *)0L} SCTX_INIT},
        {"ttytype", "tty", P_STRING | P_EXPAND | P_NODEFAULT | P_NO_MKRC | P_VI_DEF | P_RALL, (char_u *)&T_NAME, PV_NONE, {(char_u *)"", (char_u *)0L} SCTX_INIT},
        {"undodir", "udir", P_STRING | P_EXPAND | P_ONECOMMA | P_NODUP | P_SECURE | P_VI_DEF,
#ifdef FEAT_PERSISTENT_UNDO
         (char_u *)&p_udir,
         PV_NONE,
         {(char_u *)".", (char_u *)0L}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)0L, (char_u *)0L}
#endif
         SCTX_INIT},
        {"undofile", "udf", P_BOOL | P_VI_DEF | P_VIM,
#ifdef FEAT_PERSISTENT_UNDO
         (char_u *)&p_udf,
         PV_UDF,
#else
         (char_u *)NULL,
         PV_NONE,
#endif
         {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"undolevels", "ul", P_NUM | P_VI_DEF, (char_u *)&p_ul, PV_UL, {
#if defined(UNIX) || defined(MSWIN) || defined(VMS)
                                                                           (char_u *)1000L,
#else
                                                                           (char_u *)100L,
#endif
                                                                           (char_u *)0L} SCTX_INIT},
        {"undoreload", "ur", P_NUM | P_VI_DEF, (char_u *)&p_ur, PV_NONE, {(char_u *)10000L, (char_u *)0L} SCTX_INIT},
        {"updatecount", "uc", P_NUM | P_VI_DEF, (char_u *)&p_uc, PV_NONE, {(char_u *)200L, (char_u *)0L} SCTX_INIT},
        {"updatetime", "ut", P_NUM | P_VI_DEF, (char_u *)&p_ut, PV_NONE, {(char_u *)4000L, (char_u *)0L} SCTX_INIT},
        {"varsofttabstop", "vsts", P_STRING | P_VI_DEF | P_VIM | P_COMMA,
#ifdef FEAT_VARTABS
         (char_u *)&p_vsts,
         PV_VSTS,
         {(char_u *)"", (char_u *)0L}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)"", (char_u *)NULL}
#endif
         SCTX_INIT},
        {"vartabstop", "vts", P_STRING | P_VI_DEF | P_VIM | P_RBUF | P_COMMA,
#ifdef FEAT_VARTABS
         (char_u *)&p_vts,
         PV_VTS,
         {(char_u *)"", (char_u *)0L}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)"", (char_u *)NULL}
#endif
         SCTX_INIT},
        {"verbose", "vbs", P_NUM | P_VI_DEF, (char_u *)&p_verbose, PV_NONE, {(char_u *)0L, (char_u *)0L} SCTX_INIT},
        {"verbosefile", "vfile", P_STRING | P_EXPAND | P_VI_DEF | P_SECURE, (char_u *)&p_vfile, PV_NONE, {(char_u *)"", (char_u *)0L} SCTX_INIT},
        {"viewdir", "vdir", P_STRING | P_EXPAND | P_VI_DEF | P_SECURE,
#ifdef FEAT_SESSION
         (char_u *)&p_vdir,
         PV_NONE,
         {(char_u *)DFLT_VDIR, (char_u *)0L}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)0L, (char_u *)0L}
#endif
         SCTX_INIT},
        {"viewoptions", "vop", P_STRING | P_VI_DEF | P_ONECOMMA | P_NODUP,
#ifdef FEAT_SESSION
         (char_u *)&p_vop,
         PV_NONE,
         {(char_u *)"folds,options,cursor,curdir", (char_u *)0L}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)0L, (char_u *)0L}
#endif
         SCTX_INIT},
        {"viminfo", "vi", P_STRING | P_ONECOMMA | P_NODUP | P_SECURE,
#ifdef FEAT_VIMINFO
         (char_u *)&p_viminfo,
         PV_NONE,
#if defined(MSWIN)
         {(char_u *)"", (char_u *)"'100,<50,s10,h,rA:,rB:"}
#else
         {(char_u *)"", (char_u *)"'100,<50,s10,h"}
#endif
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)0L, (char_u *)0L}
#endif
         SCTX_INIT},
        {"viminfofile", "vif", P_STRING | P_EXPAND | P_ONECOMMA | P_NODUP | P_SECURE | P_VI_DEF,
#ifdef FEAT_VIMINFO
         (char_u *)&p_viminfofile,
         PV_NONE,
         {(char_u *)"", (char_u *)0L}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)0L, (char_u *)0L}
#endif
         SCTX_INIT},
        {"virtualedit", "ve", P_STRING | P_ONECOMMA | P_NODUP | P_VI_DEF | P_VIM | P_CURSWANT, (char_u *)&p_ve, PV_NONE, {(char_u *)"", (char_u *)""} SCTX_INIT},
        {"visualbell", "vb", P_BOOL | P_VI_DEF, (char_u *)&p_vb, PV_NONE, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"w300", NULL, P_NUM | P_VI_DEF, (char_u *)NULL, PV_NONE, {(char_u *)0L, (char_u *)0L} SCTX_INIT},
        {"w1200", NULL, P_NUM | P_VI_DEF, (char_u *)NULL, PV_NONE, {(char_u *)0L, (char_u *)0L} SCTX_INIT},
        {"w9600", NULL, P_NUM | P_VI_DEF, (char_u *)NULL, PV_NONE, {(char_u *)0L, (char_u *)0L} SCTX_INIT},
        {"warn", NULL, P_BOOL | P_VI_DEF, (char_u *)&p_warn, PV_NONE, {(char_u *)TRUE, (char_u *)0L} SCTX_INIT},
        {"weirdinvert", "wiv", P_BOOL | P_VI_DEF | P_RCLR, (char_u *)&p_wiv, PV_NONE, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"whichwrap", "ww", P_STRING | P_VIM | P_ONECOMMA | P_FLAGLIST, (char_u *)&p_ww, PV_NONE, {(char_u *)"", (char_u *)"b,s"} SCTX_INIT},
        {"wildchar", "wc", P_NUM | P_VIM, (char_u *)&p_wc, PV_NONE, {(char_u *)(long)Ctrl_E, (char_u *)(long)TAB} SCTX_INIT},
        {"wildcharm", "wcm", P_NUM | P_VI_DEF, (char_u *)&p_wcm, PV_NONE, {(char_u *)0L, (char_u *)0L} SCTX_INIT},
        {"wildignore", "wig", P_STRING | P_VI_DEF | P_ONECOMMA | P_NODUP,
#ifdef FEAT_WILDIGN
         (char_u *)&p_wig,
         PV_NONE,
#else
         (char_u *)NULL,
         PV_NONE,
#endif
         {(char_u *)"", (char_u *)0L} SCTX_INIT},
        {"wildignorecase", "wic", P_BOOL | P_VI_DEF, (char_u *)&p_wic, PV_NONE, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"wildmenu", "wmnu", P_BOOL | P_VI_DEF,
#ifdef FEAT_WILDMENU
         (char_u *)&p_wmnu,
         PV_NONE,
#else
         (char_u *)NULL,
         PV_NONE,
#endif
         {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"wildmode", "wim", P_STRING | P_VI_DEF | P_ONECOMMA | P_NODUP, (char_u *)&p_wim, PV_NONE, {(char_u *)"full", (char_u *)0L} SCTX_INIT},
        {"wildoptions", "wop", P_STRING | P_VI_DEF,
#ifdef FEAT_CMDL_COMPL
         (char_u *)&p_wop,
         PV_NONE,
         {(char_u *)"", (char_u *)0L}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)NULL, (char_u *)0L}
#endif
         SCTX_INIT},
        {"winaltkeys", "wak", P_STRING | P_VI_DEF,
#ifdef FEAT_WAK
         (char_u *)&p_wak,
         PV_NONE,
         {(char_u *)"menu", (char_u *)0L}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)NULL, (char_u *)0L}
#endif
         SCTX_INIT},
        {"wincolor", "wcr", P_STRING | P_ALLOCED | P_VI_DEF | P_RWIN, (char_u *)VAR_WIN, PV_WCR, {(char_u *)"", (char_u *)NULL} SCTX_INIT},
        {"window", "wi", P_NUM | P_VI_DEF, (char_u *)&p_window, PV_NONE, {(char_u *)0L, (char_u *)0L} SCTX_INIT},
        {"winheight", "wh", P_NUM | P_VI_DEF, (char_u *)&p_wh, PV_NONE, {(char_u *)1L, (char_u *)0L} SCTX_INIT},
        {"winfixheight", "wfh", P_BOOL | P_VI_DEF | P_RSTAT, (char_u *)VAR_WIN, PV_WFH, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"winfixwidth", "wfw", P_BOOL | P_VI_DEF | P_RSTAT, (char_u *)VAR_WIN, PV_WFW, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"winminheight", "wmh", P_NUM | P_VI_DEF, (char_u *)&p_wmh, PV_NONE, {(char_u *)1L, (char_u *)0L} SCTX_INIT},
        {"winminwidth", "wmw", P_NUM | P_VI_DEF, (char_u *)&p_wmw, PV_NONE, {(char_u *)1L, (char_u *)0L} SCTX_INIT},
        {"winptydll", NULL, P_STRING | P_EXPAND | P_VI_DEF | P_SECURE,
#if defined(MSWIN) && defined(FEAT_TERMINAL)
         (char_u *)&p_winptydll,
         PV_NONE,
         {
#ifdef _WIN64
             (char_u *)"winpty64.dll",
#else
             (char_u *)"winpty32.dll",
#endif
             (char_u *)0L}
#else
         (char_u *)NULL,
         PV_NONE,
         {(char_u *)0L, (char_u *)0L}
#endif
         SCTX_INIT},
        {"winwidth", "wiw", P_NUM | P_VI_DEF, (char_u *)&p_wiw, PV_NONE, {(char_u *)20L, (char_u *)0L} SCTX_INIT},
        {"wrap", NULL, P_BOOL | P_VI_DEF | P_RWIN, (char_u *)VAR_WIN, PV_WRAP, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"wrapmargin", "wm", P_NUM | P_VI_DEF, (char_u *)&p_wm, PV_WM, {(char_u *)0L, (char_u *)0L} SCTX_INIT},
        {"wrapscan", "ws", P_BOOL | P_VI_DEF, (char_u *)&p_ws, PV_NONE, {(char_u *)TRUE, (char_u *)0L} SCTX_INIT},
        {"write", NULL, P_BOOL | P_VI_DEF, (char_u *)&p_write, PV_NONE, {(char_u *)TRUE, (char_u *)0L} SCTX_INIT},
        {"writeany", "wa", P_BOOL | P_VI_DEF, (char_u *)&p_wa, PV_NONE, {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
        {"writebackup", "wb", P_BOOL | P_VI_DEF | P_VIM, (char_u *)&p_wb, PV_NONE, {
#ifdef FEAT_WRITEBACKUP
                                                                                       (char_u *)TRUE,
#else
                                                                                       (char_u *)FALSE,
#endif
                                                                                       (char_u *)0L} SCTX_INIT},
        {"writedelay", "wd", P_NUM | P_VI_DEF, (char_u *)&p_wd, PV_NONE, {(char_u *)0L, (char_u *)0L} SCTX_INIT},

/* terminal output codes */
#define p_term(sss, vvv) {sss, NULL, P_STRING | P_VI_DEF | P_RALL | P_SECURE, (char_u *)&vvv, PV_NONE, {(char_u *)"", (char_u *)0L} SCTX_INIT},

        p_term("t_AB", T_CAB) p_term("t_AF", T_CAF) p_term("t_AL", T_CAL) p_term("t_al", T_AL) p_term("t_bc", T_BC) p_term("t_BE", T_BE) p_term("t_BD", T_BD) p_term("t_cd", T_CD) p_term("t_ce", T_CE) p_term("t_cl", T_CL) p_term("t_cm", T_CM) p_term("t_Ce", T_UCE) p_term("t_Co", T_CCO) p_term("t_CS", T_CCS) p_term("t_Cs", T_UCS) p_term("t_cs", T_CS) p_term("t_CV", T_CSV) p_term("t_da", T_DA) p_term("t_db", T_DB) p_term("t_DL", T_CDL) p_term("t_dl", T_DL) p_term("t_EC", T_CEC) p_term("t_EI", T_CEI) p_term("t_fs", T_FS) p_term("t_GP", T_CGP) p_term("t_IE", T_CIE) p_term("t_IS", T_CIS) p_term("t_ke", T_KE) p_term("t_ks", T_KS) p_term("t_le", T_LE) p_term("t_mb", T_MB) p_term("t_md", T_MD) p_term("t_me", T_ME) p_term("t_mr", T_MR) p_term("t_ms", T_MS) p_term("t_nd", T_ND) p_term("t_op", T_OP) p_term("t_RF", T_RFG) p_term("t_RB", T_RBG) p_term("t_RC", T_CRC) p_term("t_RI", T_CRI) p_term("t_Ri", T_SRI) p_term("t_RS", T_CRS) p_term("t_RT", T_CRT) p_term("t_RV", T_CRV) p_term("t_Sb", T_CSB) p_term("t_SC", T_CSC) p_term("t_se", T_SE) p_term("t_Sf", T_CSF) p_term("t_SH", T_CSH) p_term("t_SI", T_CSI) p_term("t_Si", T_SSI) p_term("t_so", T_SO) p_term("t_SR", T_CSR) p_term("t_sr", T_SR) p_term("t_ST", T_CST) p_term("t_Te", T_STE) p_term("t_te", T_TE) p_term("t_ti", T_TI) p_term("t_Ts", T_STS) p_term("t_ts", T_TS) p_term("t_u7", T_U7) p_term("t_ue", T_UE) p_term("t_us", T_US) p_term("t_ut", T_UT) p_term("t_vb", T_VB) p_term("t_ve", T_VE) p_term("t_vi", T_VI) p_term("t_VS", T_CVS) p_term("t_vs", T_VS) p_term("t_WP", T_CWP) p_term("t_WS", T_CWS) p_term("t_xn", T_XN) p_term("t_xs", T_XS) p_term("t_ZH", T_CZH) p_term("t_ZR", T_CZR) p_term("t_8f", T_8F) p_term("t_8b", T_8B)

        /* terminal key codes are not in here */

        /* end marker */
        {NULL, NULL, 0, NULL, PV_NONE, {NULL, NULL} SCTX_INIT}};

#define PARAM_COUNT (sizeof(options) / sizeof(struct vimoption))

static char *(p_ambw_values[]) = {"single", "double", NULL};
static char *(p_bg_values[]) = {"light", "dark", NULL};
static char *(p_nf_values[]) = {"bin", "octal", "hex", "alpha", NULL};
static char *(p_ff_values[]) = {FF_UNIX, FF_DOS, FF_MAC, NULL};
#ifdef FEAT_CMDL_COMPL
static char *(p_wop_values[]) = {"tagfile", NULL};
#endif
#ifdef FEAT_WAK
static char *(p_wak_values[]) = {"yes", "menu", "no", NULL};
#endif
static char *(p_mousem_values[]) = {"extend", "popup", "popup_setpos", "mac", NULL};
static char *(p_sel_values[]) = {"inclusive", "exclusive", "old", NULL};
static char *(p_slm_values[]) = {"mouse", "key", "cmd", NULL};
static char *(p_km_values[]) = {"startsel", "stopsel", NULL};
#ifdef FEAT_BROWSE
static char *(p_bsdir_values[]) = {"current", "last", "buffer", NULL};
#endif
static char *(p_scbopt_values[]) = {"ver", "hor", "jump", NULL};
static char *(p_debug_values[]) = {"msg", "throw", "beep", NULL};
static char *(p_ead_values[]) = {"both", "ver", "hor", NULL};
static char *(p_buftype_values[]) = {"nofile", "nowrite", "quickfix", "help", "terminal", "acwrite", "prompt", "popup", NULL};
static char *(p_bufhidden_values[]) = {"hide", "unload", "delete", "wipe", NULL};
static char *(p_bs_values[]) = {"indent", "eol", "start", NULL};
#ifdef FEAT_FOLDING
static char *(p_fdm_values[]) = {"manual", "expr", "marker", "indent", "syntax",
#ifdef FEAT_DIFF
                                 "diff",
#endif
                                 NULL};
static char *(p_fcl_values[]) = {"all", NULL};
#endif
#ifdef FEAT_SIGNS
static char *(p_scl_values[]) = {"yes", "no", "auto", NULL};
#endif
#if defined(MSWIN) && defined(FEAT_TERMINAL)
static char *(p_twt_values[]) = {"winpty", "conpty", "", NULL};
#endif

static void set_options_default(int opt_flags);
static void set_string_default_esc(char *name, char_u *val, int escape);
static char_u *term_bg_default(void);
static void did_set_option(int opt_idx, int opt_flags, int new_value, int value_checked);
static char_u *option_expand(int opt_idx, char_u *val);
static void didset_options(void);
static void didset_options2(void);
static void check_string_option(char_u **pp);
#if defined(FEAT_EVAL) || defined(PROTO)
static long_u *insecure_flag(int opt_idx, int opt_flags);
#else
#define insecure_flag(opt_idx, opt_flags) (&options[opt_idx].flags)
#endif
static void set_string_option_global(int opt_idx, char_u **varp);
static char *did_set_string_option(int opt_idx, char_u **varp, int new_value_alloced, char_u *oldval, char *errbuf, int opt_flags, int *value_checked);
static char *set_chars_option(char_u **varp);
#ifdef FEAT_EVAL
static void set_option_sctx_idx(int opt_idx, int opt_flags, sctx_T script_ctx);
#endif
static char *set_bool_option(int opt_idx, char_u *varp, int value, int opt_flags);
static char *set_num_option(int opt_idx, char_u *varp, long value, char *errbuf, size_t errbuflen, int opt_flags);
static void check_redraw(long_u flags);
static int findoption(char_u *);
static int find_key_option(char_u *arg_arg, int has_lt);
static void showoptions(int all, int opt_flags);
static int optval_default(struct vimoption *, char_u *varp, int compatible);
static void showoneopt(struct vimoption *, int opt_flags);
static int put_setstring(FILE *fd, char *cmd, char *name, char_u **valuep, long_u flags);
static int put_setnum(FILE *fd, char *cmd, char *name, long *valuep);
static int put_setbool(FILE *fd, char *cmd, char *name, int value);
static int istermoption(struct vimoption *);
static char_u *get_varp_scope(struct vimoption *p, int opt_flags);
static char_u *get_varp(struct vimoption *);
static void option_value2string(struct vimoption *, int opt_flags);
static void check_winopt(winopt_T *wop);
static int wc_use_keyname(char_u *varp, long *wcp);
#ifdef FEAT_LANGMAP
static void langmap_init(void);
static void langmap_set(void);
#endif
static void paste_option_changed(void);
static void compatible_set(void);
#ifdef FEAT_LINEBREAK
static void fill_breakat_flags(void);
#endif
static int opt_strings_flags(char_u *val, char **values, unsigned *flagp, int list);
static int check_opt_strings(char_u *val, char **values, int);
static int check_opt_wim(void);
#ifdef FEAT_LINEBREAK
static int briopt_check(win_T *wp);
#endif

/*
 * Initialize the options, first part.
 *
 * Called only once from main(), just after creating the first buffer.
 * If "clean_arg" is TRUE Vim was started with --clean.
 */
void set_init_1(int clean_arg)
{
  char_u *p;
  int opt_idx;
  long_u n;

#ifdef FEAT_LANGMAP
  langmap_init();
#endif

  /* Be Vi compatible by default */
  p_cp = TRUE;

  /* Use POSIX compatibility when $VIM_POSIX is set. */
  if (mch_getenv((char_u *)"VIM_POSIX") != NULL)
  {
    set_string_default("cpo", (char_u *)CPO_ALL);
    set_string_default("shm", (char_u *)SHM_POSIX);
  }

  /*
     * Find default value for 'shell' option.
     * Don't use it if it is empty.
     */
  if (((p = mch_getenv((char_u *)"SHELL")) != NULL && *p != NUL)
#if defined(MSWIN)
      || ((p = mch_getenv((char_u *)"COMSPEC")) != NULL && *p != NUL) || ((p = (char_u *)default_shell()) != NULL && *p != NUL)
#endif
  )
    set_string_default_esc("sh", p, TRUE);

#ifdef FEAT_WILDIGN
  /*
     * Set the default for 'backupskip' to include environment variables for
     * temp files.
     */
  {
#ifdef UNIX
    static char *(names[4]) = {"", "TMPDIR", "TEMP", "TMP"};
#else
    static char *(names[3]) = {"TMPDIR", "TEMP", "TMP"};
#endif
    int len;
    garray_T ga;
    int mustfree;

    ga_init2(&ga, 1, 100);
    for (n = 0; n < (long)(sizeof(names) / sizeof(char *)); ++n)
    {
      mustfree = FALSE;
#ifdef UNIX
      if (*names[n] == NUL)
#ifdef MACOS_X
        p = (char_u *)"/private/tmp";
#else
        p = (char_u *)"/tmp";
#endif
      else
#endif
        p = vim_getenv((char_u *)names[n], &mustfree);
      if (p != NULL && *p != NUL)
      {
        /* First time count the NUL, otherwise count the ','. */
        len = (int)STRLEN(p) + 3;
        if (ga_grow(&ga, len) == OK)
        {
          if (ga.ga_len > 0)
            STRCAT(ga.ga_data, ",");
          STRCAT(ga.ga_data, p);
          add_pathsep(ga.ga_data);
          STRCAT(ga.ga_data, "*");
          ga.ga_len += len;
        }
      }
      if (mustfree)
        vim_free(p);
    }
    if (ga.ga_data != NULL)
    {
      set_string_default("bsk", ga.ga_data);
      vim_free(ga.ga_data);
    }
  }
#endif

  /*
     * 'maxmemtot' and 'maxmem' may have to be adjusted for available memory
     */
  opt_idx = findoption((char_u *)"maxmemtot");
  if (opt_idx >= 0)
  {
#if !defined(HAVE_AVAIL_MEM) && !defined(HAVE_TOTAL_MEM)
    if (options[opt_idx].def_val[VI_DEFAULT] == (char_u *)0L)
#endif
    {
#ifdef HAVE_AVAIL_MEM
      /* Use amount of memory available at this moment. */
      n = (mch_avail_mem(FALSE) >> 1);
#else
#ifdef HAVE_TOTAL_MEM
      /* Use amount of memory available to Vim. */
      n = (mch_total_mem(FALSE) >> 1);
#else
      n = (0x7fffffff >> 11);
#endif
#endif
      options[opt_idx].def_val[VI_DEFAULT] = (char_u *)n;
      opt_idx = findoption((char_u *)"maxmem");
      if (opt_idx >= 0)
      {
#if !defined(HAVE_AVAIL_MEM) && !defined(HAVE_TOTAL_MEM)
        if ((long)(long_i)options[opt_idx].def_val[VI_DEFAULT] > (long)n || (long)(long_i)options[opt_idx].def_val[VI_DEFAULT] == 0L)
#endif
          options[opt_idx].def_val[VI_DEFAULT] = (char_u *)n;
      }
    }
  }

#ifdef FEAT_SEARCHPATH
  {
    char_u *cdpath;
    char_u *buf;
    int i;
    int j;
    int mustfree = FALSE;

    /* Initialize the 'cdpath' option's default value. */
    cdpath = vim_getenv((char_u *)"CDPATH", &mustfree);
    if (cdpath != NULL)
    {
      buf = alloc((STRLEN(cdpath) << 1) + 2);
      if (buf != NULL)
      {
        buf[0] = ','; /* start with ",", current dir first */
        j = 1;
        for (i = 0; cdpath[i] != NUL; ++i)
        {
          if (vim_ispathlistsep(cdpath[i]))
            buf[j++] = ',';
          else
          {
            if (cdpath[i] == ' ' || cdpath[i] == ',')
              buf[j++] = '\\';
            buf[j++] = cdpath[i];
          }
        }
        buf[j] = NUL;
        opt_idx = findoption((char_u *)"cdpath");
        if (opt_idx >= 0)
        {
          options[opt_idx].def_val[VI_DEFAULT] = buf;
          options[opt_idx].flags |= P_DEF_ALLOCED;
        }
        else
          vim_free(buf); /* cannot happen */
      }
      if (mustfree)
        vim_free(cdpath);
    }
  }
#endif

#if defined(FEAT_POSTSCRIPT) && (defined(MSWIN) || defined(VMS) || defined(EBCDIC) || defined(MAC) || defined(hpux))
  /* Set print encoding on platforms that don't default to latin1 */
  set_string_default("penc",
#if defined(MSWIN)
                     (char_u *)"cp1252"
#else
#ifdef VMS
                     (char_u *)"dec-mcs"
#else
#ifdef EBCDIC
                     (char_u *)"ebcdic-uk"
#else
#ifdef MAC
                     (char_u *)"mac-roman"
#else /* HPUX */
                     (char_u *)"hp-roman8"
#endif
#endif
#endif
#endif
  );
#endif

#ifdef FEAT_POSTSCRIPT
  /* 'printexpr' must be allocated to be able to evaluate it. */
  set_string_default("pexpr",
#if defined(MSWIN)
                     (char_u *)"system('copy' . ' ' . v:fname_in . (&printdevice == '' ? ' LPT1:' : (' \"' . &printdevice . '\"'))) . delete(v:fname_in)"
#else
#ifdef VMS
                     (char_u *)"system('print/delete' . (&printdevice == '' ? '' : ' /queue=' . &printdevice) . ' ' . v:fname_in)"

#else
                     (char_u *)"system('lpr' . (&printdevice == '' ? '' : ' -P' . &printdevice) . ' ' . v:fname_in) . delete(v:fname_in) + v:shell_error"
#endif
#endif
  );
#endif

  /*
     * Set all the options (except the terminal options) to their default
     * value.  Also set the global value for local options.
     */
  set_options_default(0);

#ifdef CLEAN_RUNTIMEPATH
  if (clean_arg)
  {
    opt_idx = findoption((char_u *)"runtimepath");
    if (opt_idx >= 0)
    {
      options[opt_idx].def_val[VI_DEFAULT] = (char_u *)CLEAN_RUNTIMEPATH;
      p_rtp = (char_u *)CLEAN_RUNTIMEPATH;
    }
    opt_idx = findoption((char_u *)"packpath");
    if (opt_idx >= 0)
    {
      options[opt_idx].def_val[VI_DEFAULT] = (char_u *)CLEAN_RUNTIMEPATH;
      p_pp = (char_u *)CLEAN_RUNTIMEPATH;
    }
  }
#endif

  curbuf->b_p_initialized = TRUE;
  curbuf->b_p_ar = -1; /* no local 'autoread' value */
  curbuf->b_p_ul = NO_LOCAL_UNDOLEVEL;
  check_buf_options(curbuf);
  check_win_options(curwin);
  check_options();

  /* Must be before option_expand(), because that one needs vim_isIDc() */
  didset_options();

  /*
     * Expand environment variables and things like "~" for the defaults.
     * If option_expand() returns non-NULL the variable is expanded.  This can
     * only happen for non-indirect options.
     * Also set the default to the expanded value, so ":set" does not list
     * them.
     * Don't set the P_ALLOCED flag, because we don't want to free the
     * default.
     */
  for (opt_idx = 0; !istermoption(&options[opt_idx]); opt_idx++)
  {
    if ((options[opt_idx].flags & P_GETTEXT) && options[opt_idx].var != NULL)
      p = (char_u *)_(*(char **)options[opt_idx].var);
    else
      p = option_expand(opt_idx, NULL);
    if (p != NULL && (p = vim_strsave(p)) != NULL)
    {
      *(char_u **)options[opt_idx].var = p;
      /* VIMEXP
	     * Defaults for all expanded options are currently the same for Vi
	     * and Vim.  When this changes, add some code here!  Also need to
	     * split P_DEF_ALLOCED in two.
	     */
      if (options[opt_idx].flags & P_DEF_ALLOCED)
        vim_free(options[opt_idx].def_val[VI_DEFAULT]);
      options[opt_idx].def_val[VI_DEFAULT] = p;
      options[opt_idx].flags |= P_DEF_ALLOCED;
    }
  }

  save_file_ff(curbuf); /* Buffer is unchanged */

#if defined(FEAT_ARABIC)
  /* Detect use of mlterm.
     * Mlterm is a terminal emulator akin to xterm that has some special
     * abilities (bidi namely).
     * NOTE: mlterm's author is being asked to 'set' a variable
     *       instead of an environment variable due to inheritance.
     */
  if (mch_getenv((char_u *)"MLTERM") != NULL)
    set_option_value((char_u *)"tbidi", 1L, NULL, 0);
#endif

  didset_options2();

#if defined(MSWIN) && defined(FEAT_GETTEXT)
  /*
     * If $LANG isn't set, try to get a good value for it.  This makes the
     * right language be used automatically.  Don't do this for English.
     */
  if (mch_getenv((char_u *)"LANG") == NULL)
  {
    char buf[20];

    /* Could use LOCALE_SISO639LANGNAME, but it's not in Win95.
	 * LOCALE_SABBREVLANGNAME gives us three letters, like "enu", we use
	 * only the first two. */
    n = GetLocaleInfo(LOCALE_USER_DEFAULT, LOCALE_SABBREVLANGNAME,
                      (LPTSTR)buf, 20);
    if (n >= 2 && STRNICMP(buf, "en", 2) != 0)
    {
      /* There are a few exceptions (probably more) */
      if (STRNICMP(buf, "cht", 3) == 0 || STRNICMP(buf, "zht", 3) == 0)
        STRCPY(buf, "zh_TW");
      else if (STRNICMP(buf, "chs", 3) == 0 || STRNICMP(buf, "zhc", 3) == 0)
        STRCPY(buf, "zh_CN");
      else if (STRNICMP(buf, "jp", 2) == 0)
        STRCPY(buf, "ja");
      else
        buf[2] = NUL; /* truncate to two-letter code */
      vim_setenv((char_u *)"LANG", (char_u *)buf);
    }
  }
#else
#ifdef MACOS_CONVERT
  /* Moved to os_mac_conv.c to avoid dependency problems. */
  mac_lang_init();
#endif
#endif

  /* enc_locale() will try to find the encoding of the current locale. */
  p = enc_locale();
  if (p != NULL)
  {
    vim_free(p);
    /* Try setting 'encoding' and check if the value is valid.
	 * If not, go back to the default "utf-8". */
    if (mb_init() == NULL)
    {
      opt_idx = findoption((char_u *)"encoding");
      if (opt_idx >= 0)
      {
        options[opt_idx].def_val[VI_DEFAULT] = p_enc;
        options[opt_idx].flags |= P_DEF_ALLOCED;
      }

#if defined(MSWIN) || defined(MACOS_X) || defined(VMS)
      if (STRCMP(p_enc, "latin1") == 0 || enc_utf8)
      {
        /* Adjust the default for 'isprint' and 'iskeyword' to match
		 * latin1.  Also set the defaults for when 'nocompatible' is
		 * set. */
        set_string_option_direct((char_u *)"isp", -1,
                                 ISP_LATIN1, OPT_FREE, SID_NONE);
        set_string_option_direct((char_u *)"isk", -1,
                                 ISK_LATIN1, OPT_FREE, SID_NONE);
        opt_idx = findoption((char_u *)"isp");
        if (opt_idx >= 0)
          options[opt_idx].def_val[VIM_DEFAULT] = ISP_LATIN1;
        opt_idx = findoption((char_u *)"isk");
        if (opt_idx >= 0)
          options[opt_idx].def_val[VIM_DEFAULT] = ISK_LATIN1;
        (void)init_chartab();
      }
#endif

#if defined(MSWIN)
      /* $HOME may have characters in active code page. */
      init_homedir();
#endif
    }
  }

#ifdef FEAT_MULTI_LANG
  /* Set the default for 'helplang'. */
  set_helplang_default(get_mess_lang());
#endif
}

/*
 * Set an option to its default value.
 * This does not take care of side effects!
 */
static void
set_option_default(
    int opt_idx,
    int opt_flags,  /* OPT_FREE, OPT_LOCAL and/or OPT_GLOBAL */
    int compatible) /* use Vi default value */
{
  char_u *varp; /* pointer to variable for current option */
  int dvi;      /* index in def_val[] */
  long_u flags;
  long_u *flagsp;
  int both = (opt_flags & (OPT_LOCAL | OPT_GLOBAL)) == 0;

  varp = get_varp_scope(&(options[opt_idx]), both ? OPT_LOCAL : opt_flags);
  flags = options[opt_idx].flags;
  if (varp != NULL) /* skip hidden option, nothing to do for it */
  {
    dvi = ((flags & P_VI_DEF) || compatible) ? VI_DEFAULT : VIM_DEFAULT;
    if (flags & P_STRING)
    {
      /* Use set_string_option_direct() for local options to handle
	     * freeing and allocating the value. */
      if (options[opt_idx].indir != PV_NONE)
        set_string_option_direct(NULL, opt_idx,
                                 options[opt_idx].def_val[dvi], opt_flags, 0);
      else
      {
        if ((opt_flags & OPT_FREE) && (flags & P_ALLOCED))
          free_string_option(*(char_u **)(varp));
        *(char_u **)varp = options[opt_idx].def_val[dvi];
        options[opt_idx].flags &= ~P_ALLOCED;
      }
    }
    else if (flags & P_NUM)
    {
      if (options[opt_idx].indir == PV_SCROLL)
        win_comp_scroll(curwin);
      else
      {
        long def_val = (long)(long_i)options[opt_idx].def_val[dvi];

        if ((long *)varp == &curwin->w_p_so || (long *)varp == &curwin->w_p_siso)
          // 'scrolloff' and 'sidescrolloff' local values have a
          // different default value than the global default.
          *(long *)varp = -1;
        else
          *(long *)varp = def_val;
        /* May also set global value for local option. */
        if (both)
          *(long *)get_varp_scope(&(options[opt_idx]), OPT_GLOBAL) =
              def_val;
      }
    }
    else /* P_BOOL */
    {
      /* the cast to long is required for Manx C, long_i is needed for
	     * MSVC */
      *(int *)varp = (int)(long)(long_i)options[opt_idx].def_val[dvi];
#ifdef UNIX
      /* 'modeline' defaults to off for root */
      if (options[opt_idx].indir == PV_ML && getuid() == ROOT_UID)
        *(int *)varp = FALSE;
#endif
      /* May also set global value for local option. */
      if (both)
        *(int *)get_varp_scope(&(options[opt_idx]), OPT_GLOBAL) =
            *(int *)varp;
    }

    /* The default value is not insecure. */
    flagsp = insecure_flag(opt_idx, opt_flags);
    *flagsp = *flagsp & ~P_INSECURE;
  }

#ifdef FEAT_EVAL
  set_option_sctx_idx(opt_idx, opt_flags, current_sctx);
#endif
}

/*
 * Set all options (except terminal options) to their default value.
 * When "opt_flags" is non-zero skip 'encoding'.
 */
static void
set_options_default(
    int opt_flags) /* OPT_FREE, OPT_LOCAL and/or OPT_GLOBAL */
{
  int i;
  win_T *wp;
  tabpage_T *tp;

  for (i = 0; !istermoption(&options[i]); i++)
    if (!(options[i].flags & P_NODEFAULT) && (opt_flags == 0 || (options[i].var != (char_u *)&p_enc)))
      set_option_default(i, opt_flags, p_cp);

  /* The 'scroll' option must be computed for all windows. */
  FOR_ALL_TAB_WINDOWS(tp, wp)
  win_comp_scroll(wp);
}

/*
 * Set the Vi-default value of a string option.
 * Used for 'sh', 'backupskip' and 'term'.
 * When "escape" is TRUE escape spaces with a backslash.
 */
static void
set_string_default_esc(char *name, char_u *val, int escape)
{
  char_u *p;
  int opt_idx;

  if (escape && vim_strchr(val, ' ') != NULL)
    p = vim_strsave_escaped(val, (char_u *)" ");
  else
    p = vim_strsave(val);
  if (p != NULL) /* we don't want a NULL */
  {
    opt_idx = findoption((char_u *)name);
    if (opt_idx >= 0)
    {
      if (options[opt_idx].flags & P_DEF_ALLOCED)
        vim_free(options[opt_idx].def_val[VI_DEFAULT]);
      options[opt_idx].def_val[VI_DEFAULT] = p;
      options[opt_idx].flags |= P_DEF_ALLOCED;
    }
  }
}

void set_string_default(char *name, char_u *val)
{
  set_string_default_esc(name, val, FALSE);
}

/*
 * Set the Vi-default value of a number option.
 * Used for 'lines' and 'columns'.
 */
void set_number_default(char *name, long val)
{
  int opt_idx;

  opt_idx = findoption((char_u *)name);
  if (opt_idx >= 0)
    options[opt_idx].def_val[VI_DEFAULT] = (char_u *)(long_i)val;
}

/*
 * Set all window-local and buffer-local options to the Vim default.
 * local-global options will use the global value.
 */
void set_local_options_default(win_T *wp)
{
  win_T *save_curwin = curwin;
  int i;

  curwin = wp;
  curbuf = curwin->w_buffer;
  block_autocmds();

  for (i = 0; !istermoption(&options[i]); i++)
  {
    struct vimoption *p = &(options[i]);
    char_u *varp = get_varp_scope(p, OPT_LOCAL);

    if (p->indir != PV_NONE && !(options[i].flags & P_NODEFAULT) && !optval_default(p, varp, FALSE))
      set_option_default(i, OPT_LOCAL, FALSE);
  }

  unblock_autocmds();
  curwin = save_curwin;
  curbuf = curwin->w_buffer;
}

#if defined(EXITFREE) || defined(PROTO)
/*
 * Free all options.
 */
void free_all_options(void)
{
  int i;

  for (i = 0; !istermoption(&options[i]); i++)
  {
    if (options[i].indir == PV_NONE)
    {
      /* global option: free value and default value. */
      if ((options[i].flags & P_ALLOCED) && options[i].var != NULL)
        free_string_option(*(char_u **)options[i].var);
      if (options[i].flags & P_DEF_ALLOCED)
        free_string_option(options[i].def_val[VI_DEFAULT]);
    }
    else if (options[i].var != VAR_WIN && (options[i].flags & P_STRING))
      /* buffer-local option: free global value */
      free_string_option(*(char_u **)options[i].var);
  }
}
#endif

/*
 * Initialize the options, part two: After getting Rows and Columns and
 * setting 'term'.
 */
void set_init_2(void)
{
  int idx;

  /*
     * 'scroll' defaults to half the window height. The stored default is zero,
     * which results in the actual value computed from the window height.
     */
  idx = findoption((char_u *)"scroll");
  if (idx >= 0 && !(options[idx].flags & P_WAS_SET))
    set_option_default(idx, OPT_LOCAL, p_cp);
  comp_col();

  /*
     * 'window' is only for backwards compatibility with Vi.
     * Default is Rows - 1.
     */
  if (!option_was_set((char_u *)"window"))
    p_window = Rows - 1;
  set_number_default("window", Rows - 1);

  /* For DOS console the default is always black. */
#if !defined(MSWIN)
  /*
     * If 'background' wasn't set by the user, try guessing the value,
     * depending on the terminal name.  Only need to check for terminals
     * with a dark background, that can handle color.
     */
  idx = findoption((char_u *)"bg");
  if (idx >= 0 && !(options[idx].flags & P_WAS_SET) && *term_bg_default() == 'd')
  {
    set_string_option_direct(NULL, idx, (char_u *)"dark", OPT_FREE, 0);
    /* don't mark it as set, when starting the GUI it may be
	 * changed again */
    options[idx].flags &= ~P_WAS_SET;
  }
#endif
}

/*
 * Return "dark" or "light" depending on the kind of terminal.
 * This is just guessing!  Recognized are:
 * "linux"	    Linux console
 * "screen.linux"   Linux console with screen
 * "cygwin.*"	    Cygwin shell
 * "putty.*"	    Putty program
 * We also check the COLORFGBG environment variable, which is set by
 * rxvt and derivatives. This variable contains either two or three
 * values separated by semicolons; we want the last value in either
 * case. If this value is 0-6 or 8, our background is dark.
 */
static char_u *
term_bg_default(void)
{
#if defined(MSWIN)
  /* DOS console is nearly always black */
  return (char_u *)"dark";
#else
  char_u *p;

  if (STRCMP(T_NAME, "linux") == 0 || STRCMP(T_NAME, "screen.linux") == 0 || STRNCMP(T_NAME, "cygwin", 6) == 0 || STRNCMP(T_NAME, "putty", 5) == 0 || ((p = mch_getenv((char_u *)"COLORFGBG")) != NULL && (p = vim_strrchr(p, ';')) != NULL && ((p[1] >= '0' && p[1] <= '6') || p[1] == '8') && p[2] == NUL))
    return (char_u *)"dark";
  return (char_u *)"light";
#endif
}

/*
 * Initialize the options, part three: After reading the .vimrc
 */
void set_init_3(void)
{
#if defined(UNIX) || defined(MSWIN)
  /*
 * Set 'shellpipe' and 'shellredir', depending on the 'shell' option.
 * This is done after other initializations, where 'shell' might have been
 * set, but only if they have not been set before.
 */
  char_u *p;
  int idx_srr;
  int do_srr;
#ifdef FEAT_QUICKFIX
  int idx_sp;
  int do_sp;
#endif

  idx_srr = findoption((char_u *)"srr");
  if (idx_srr < 0)
    do_srr = FALSE;
  else
    do_srr = !(options[idx_srr].flags & P_WAS_SET);
#ifdef FEAT_QUICKFIX
  idx_sp = findoption((char_u *)"sp");
  if (idx_sp < 0)
    do_sp = FALSE;
  else
    do_sp = !(options[idx_sp].flags & P_WAS_SET);
#endif
  p = get_isolated_shell_name();
  if (p != NULL)
  {
    /*
	 * Default for p_sp is "| tee", for p_srr is ">".
	 * For known shells it is changed here to include stderr.
	 */
    if (fnamecmp(p, "csh") == 0 || fnamecmp(p, "tcsh") == 0
#if defined(MSWIN) // also check with .exe extension
        || fnamecmp(p, "csh.exe") == 0 || fnamecmp(p, "tcsh.exe") == 0
#endif
    )
    {
#if defined(FEAT_QUICKFIX)
      if (do_sp)
      {
#ifdef MSWIN
        p_sp = (char_u *)">&";
#else
        p_sp = (char_u *)"|& tee";
#endif
        options[idx_sp].def_val[VI_DEFAULT] = p_sp;
      }
#endif
      if (do_srr)
      {
        p_srr = (char_u *)">&";
        options[idx_srr].def_val[VI_DEFAULT] = p_srr;
      }
    }
    else
        /* Always use bourne shell style redirection if we reach this */
        if (fnamecmp(p, "sh") == 0 || fnamecmp(p, "ksh") == 0 || fnamecmp(p, "mksh") == 0 || fnamecmp(p, "pdksh") == 0 || fnamecmp(p, "zsh") == 0 || fnamecmp(p, "zsh-beta") == 0 || fnamecmp(p, "bash") == 0 || fnamecmp(p, "fish") == 0
#ifdef MSWIN
            || fnamecmp(p, "cmd") == 0 || fnamecmp(p, "sh.exe") == 0 || fnamecmp(p, "ksh.exe") == 0 || fnamecmp(p, "mksh.exe") == 0 || fnamecmp(p, "pdksh.exe") == 0 || fnamecmp(p, "zsh.exe") == 0 || fnamecmp(p, "zsh-beta.exe") == 0 || fnamecmp(p, "bash.exe") == 0 || fnamecmp(p, "cmd.exe") == 0
#endif
        )
    {
#if defined(FEAT_QUICKFIX)
      if (do_sp)
      {
#ifdef MSWIN
        p_sp = (char_u *)">%s 2>&1";
#else
        p_sp = (char_u *)"2>&1| tee";
#endif
        options[idx_sp].def_val[VI_DEFAULT] = p_sp;
      }
#endif
      if (do_srr)
      {
        p_srr = (char_u *)">%s 2>&1";
        options[idx_srr].def_val[VI_DEFAULT] = p_srr;
      }
    }
    vim_free(p);
  }
#endif

#if defined(MSWIN)
  /*
     * Set 'shellcmdflag', 'shellxquote', and 'shellquote' depending on the
     * 'shell' option.
     * This is done after other initializations, where 'shell' might have been
     * set, but only if they have not been set before.  Default for p_shcf is
     * "/c", for p_shq is "".  For "sh" like  shells it is changed here to
     * "-c" and "\"".  And for Win32 we need to set p_sxq instead.
     */
  if (strstr((char *)gettail(p_sh), "sh") != NULL)
  {
    int idx3;

    idx3 = findoption((char_u *)"shcf");
    if (idx3 >= 0 && !(options[idx3].flags & P_WAS_SET))
    {
      p_shcf = (char_u *)"-c";
      options[idx3].def_val[VI_DEFAULT] = p_shcf;
    }

    /* Somehow Win32 requires the quotes around the redirection too */
    idx3 = findoption((char_u *)"sxq");
    if (idx3 >= 0 && !(options[idx3].flags & P_WAS_SET))
    {
      p_sxq = (char_u *)"\"";
      options[idx3].def_val[VI_DEFAULT] = p_sxq;
    }
  }
  else if (strstr((char *)gettail(p_sh), "cmd.exe") != NULL)
  {
    int idx3;

    /*
	 * cmd.exe on Windows will strip the first and last double quote given
	 * on the command line, e.g. most of the time things like:
	 *   cmd /c "my path/to/echo" "my args to echo"
	 * become:
	 *   my path/to/echo" "my args to echo
	 * when executed.
	 *
	 * To avoid this, set shellxquote to surround the command in
	 * parenthesis.  This appears to make most commands work, without
	 * breaking commands that worked previously, such as
	 * '"path with spaces/cmd" "a&b"'.
	 */
    idx3 = findoption((char_u *)"sxq");
    if (idx3 >= 0 && !(options[idx3].flags & P_WAS_SET))
    {
      p_sxq = (char_u *)"(";
      options[idx3].def_val[VI_DEFAULT] = p_sxq;
    }

    idx3 = findoption((char_u *)"shcf");
    if (idx3 >= 0 && !(options[idx3].flags & P_WAS_SET))
    {
      p_shcf = (char_u *)"/c";
      options[idx3].def_val[VI_DEFAULT] = p_shcf;
    }
  }
#endif

  if (BUFEMPTY())
  {
    int idx_ffs = findoption((char_u *)"ffs");

    /* Apply the first entry of 'fileformats' to the initial buffer. */
    if (idx_ffs >= 0 && (options[idx_ffs].flags & P_WAS_SET))
      set_fileformat(default_fileformat(), OPT_LOCAL);
  }
}

#if defined(FEAT_MULTI_LANG) || defined(PROTO)
/*
 * When 'helplang' is still at its default value, set it to "lang".
 * Only the first two characters of "lang" are used.
 */
void set_helplang_default(char_u *lang)
{
  int idx;

  if (lang == NULL || STRLEN(lang) < 2) /* safety check */
    return;
  idx = findoption((char_u *)"hlg");
  if (idx >= 0 && !(options[idx].flags & P_WAS_SET))
  {
    if (options[idx].flags & P_ALLOCED)
      free_string_option(p_hlg);
    p_hlg = vim_strsave(lang);
    if (p_hlg == NULL)
      p_hlg = empty_option;
    else
    {
      // zh_CN becomes "cn", zh_TW becomes "tw"
      if (STRNICMP(p_hlg, "zh_", 3) == 0 && STRLEN(p_hlg) >= 5)
      {
        p_hlg[0] = TOLOWER_ASC(p_hlg[3]);
        p_hlg[1] = TOLOWER_ASC(p_hlg[4]);
      }
      // any C like setting, such as C.UTF-8, becomes "en"
      else if (STRLEN(p_hlg) >= 1 && *p_hlg == 'C')
      {
        p_hlg[0] = 'e';
        p_hlg[1] = 'n';
      }
      p_hlg[2] = NUL;
    }
    options[idx].flags |= P_ALLOCED;
  }
}
#endif

#if defined(FEAT_EVAL)
static void
trigger_optionsset_string(
    int opt_idx,
    int opt_flags,
    char_u *oldval,
    char_u *newval)
{
  // Don't do this recursively.
  if (oldval != NULL && newval != NULL && *get_vim_var_str(VV_OPTION_TYPE) == NUL)
  {
    char_u buf_type[7];

    sprintf((char *)buf_type, "%s",
            (opt_flags & OPT_LOCAL) ? "local" : "global");
    set_vim_var_string(VV_OPTION_OLD, oldval, -1);
    set_vim_var_string(VV_OPTION_NEW, newval, -1);
    set_vim_var_string(VV_OPTION_TYPE, buf_type, -1);
    apply_autocmds(EVENT_OPTIONSET,
                   (char_u *)options[opt_idx].fullname, NULL, FALSE, NULL);
    reset_v_option_vars();
  }
}
#endif

/*
 * Parse 'arg' for option settings.
 *
 * 'arg' may be IObuff, but only when no errors can be present and option
 * does not need to be expanded with option_expand().
 * "opt_flags":
 * 0 for ":set"
 * OPT_GLOBAL   for ":setglobal"
 * OPT_LOCAL    for ":setlocal" and a modeline
 * OPT_MODELINE for a modeline
 * OPT_WINONLY  to only set window-local options
 * OPT_NOWIN	to skip setting window-local options
 *
 * returns FAIL if an error is detected, OK otherwise
 */
int do_set(
    char_u *arg, /* option string (may be written to!) */
    int opt_flags)
{
  int opt_idx;
  char *errmsg;
  char errbuf[80];
  char_u *startarg;
  int prefix;    /* 1: nothing, 0: "no", 2: "inv" in front of name */
  int nextchar;  /* next non-white char after option name */
  int afterchar; /* character just after option name */
  int len;
  int i;
  varnumber_T value;
  int key;
  long_u flags;         /* flags for current option */
  char_u *varp = NULL;  /* pointer to variable for current option */
  int did_show = FALSE; /* already showed one value */
  int adding;           /* "opt+=arg" */
  int prepending;       /* "opt^=arg" */
  int removing;         /* "opt-=arg" */
  int cp_val = 0;
  char_u key_name[2];

  if (*arg == NUL)
  {
    showoptions(0, opt_flags);
    did_show = TRUE;
    goto theend;
  }

  while (*arg != NUL) /* loop to process all options */
  {
    errmsg = NULL;
    startarg = arg; /* remember for error message */

    if (STRNCMP(arg, "all", 3) == 0 && !isalpha(arg[3]) && !(opt_flags & OPT_MODELINE))
    {
      /*
	     * ":set all"  show all options.
	     * ":set all&" set all options to their default value.
	     */
      arg += 3;
      if (*arg == '&')
      {
        ++arg;
        /* Only for :set command set global value of local options. */
        set_options_default(OPT_FREE | opt_flags);
        didset_options();
        didset_options2();
        redraw_all_later(CLEAR);
      }
      else
      {
        showoptions(1, opt_flags);
        did_show = TRUE;
      }
    }
    else if (STRNCMP(arg, "termcap", 7) == 0 && !(opt_flags & OPT_MODELINE))
    {
      showoptions(2, opt_flags);
      show_termcodes();
      did_show = TRUE;
      arg += 7;
    }
    else
    {
      prefix = 1;
      if (STRNCMP(arg, "no", 2) == 0 && STRNCMP(arg, "novice", 6) != 0)
      {
        prefix = 0;
        arg += 2;
      }
      else if (STRNCMP(arg, "inv", 3) == 0)
      {
        prefix = 2;
        arg += 3;
      }

      /* find end of name */
      key = 0;
      if (*arg == '<')
      {
        opt_idx = -1;
        /* look out for <t_>;> */
        if (arg[1] == 't' && arg[2] == '_' && arg[3] && arg[4])
          len = 5;
        else
        {
          len = 1;
          while (arg[len] != NUL && arg[len] != '>')
            ++len;
        }
        if (arg[len] != '>')
        {
          errmsg = e_invarg;
          goto skip;
        }
        arg[len] = NUL;                     /* put NUL after name */
        if (arg[1] == 't' && arg[2] == '_') /* could be term code */
          opt_idx = findoption(arg + 1);
        arg[len++] = '>'; /* restore '>' */
        if (opt_idx == -1)
          key = find_key_option(arg + 1, TRUE);
      }
      else
      {
        len = 0;
        /*
		 * The two characters after "t_" may not be alphanumeric.
		 */
        if (arg[0] == 't' && arg[1] == '_' && arg[2] && arg[3])
          len = 4;
        else
          while (ASCII_ISALNUM(arg[len]) || arg[len] == '_')
            ++len;
        nextchar = arg[len];
        arg[len] = NUL; /* put NUL after name */
        opt_idx = findoption(arg);
        arg[len] = nextchar; /* restore nextchar */
        if (opt_idx == -1)
          key = find_key_option(arg, FALSE);
      }

      /* remember character after option name */
      afterchar = arg[len];

      /* skip white space, allow ":set ai  ?" */
      while (VIM_ISWHITE(arg[len]))
        ++len;

      adding = FALSE;
      prepending = FALSE;
      removing = FALSE;
      if (arg[len] != NUL && arg[len + 1] == '=')
      {
        if (arg[len] == '+')
        {
          adding = TRUE; /* "+=" */
          ++len;
        }
        else if (arg[len] == '^')
        {
          prepending = TRUE; /* "^=" */
          ++len;
        }
        else if (arg[len] == '-')
        {
          removing = TRUE; /* "-=" */
          ++len;
        }
      }
      nextchar = arg[len];

      if (opt_idx == -1 && key == 0) /* found a mismatch: skip */
      {
        errmsg = N_("E518: Unknown option");
        goto skip;
      }

      if (opt_idx >= 0)
      {
        if (options[opt_idx].var == NULL) /* hidden option: skip */
        {
          /* Only give an error message when requesting the value of
		     * a hidden option, ignore setting it. */
          if (vim_strchr((char_u *)"=:!&<", nextchar) == NULL && (!(options[opt_idx].flags & P_BOOL) || nextchar == '?'))
            errmsg = N_("E519: Option not supported");
          goto skip;
        }

        flags = options[opt_idx].flags;
        varp = get_varp_scope(&(options[opt_idx]), opt_flags);
      }
      else
      {
        flags = P_STRING;
        if (key < 0)
        {
          key_name[0] = KEY2TERMCAP0(key);
          key_name[1] = KEY2TERMCAP1(key);
        }
        else
        {
          key_name[0] = KS_KEY;
          key_name[1] = (key & 0xff);
        }
      }

      /* Skip all options that are not window-local (used when showing
	     * an already loaded buffer in a window). */
      if ((opt_flags & OPT_WINONLY) && (opt_idx < 0 || options[opt_idx].var != VAR_WIN))
        goto skip;

      /* Skip all options that are window-local (used for :vimgrep). */
      if ((opt_flags & OPT_NOWIN) && opt_idx >= 0 && options[opt_idx].var == VAR_WIN)
        goto skip;

      /* Disallow changing some options from modelines. */
      if (opt_flags & OPT_MODELINE)
      {
        if (flags & (P_SECURE | P_NO_ML))
        {
          errmsg = _("E520: Not allowed in a modeline");
          goto skip;
        }
        if ((flags & P_MLE) && !p_mle)
        {
          errmsg = _("E992: Not allowed in a modeline when 'modelineexpr' is off");
          goto skip;
        }
#ifdef FEAT_DIFF
        /* In diff mode some options are overruled.  This avoids that
		 * 'foldmethod' becomes "marker" instead of "diff" and that
		 * "wrap" gets set. */
        if (curwin->w_p_diff && opt_idx >= 0 /* shut up coverity warning */
            && (
#ifdef FEAT_FOLDING
                   options[opt_idx].indir == PV_FDM ||
#endif
                   options[opt_idx].indir == PV_WRAP))
          goto skip;
#endif
      }

#ifdef HAVE_SANDBOX
      /* Disallow changing some options in the sandbox */
      if (sandbox != 0 && (flags & P_SECURE))
      {
        errmsg = _(e_sandbox);
        goto skip;
      }
#endif

      if (vim_strchr((char_u *)"?=:!&<", nextchar) != NULL)
      {
        arg += len;
        cp_val = p_cp;
        if (nextchar == '&' && arg[1] == 'v' && arg[2] == 'i')
        {
          if (arg[3] == 'm') /* "opt&vim": set to Vim default */
          {
            cp_val = FALSE;
            arg += 3;
          }
          else /* "opt&vi": set to Vi default */
          {
            cp_val = TRUE;
            arg += 2;
          }
        }
        if (vim_strchr((char_u *)"?!&<", nextchar) != NULL && arg[1] != NUL && !VIM_ISWHITE(arg[1]))
        {
          errmsg = e_trailing;
          goto skip;
        }
      }

      /*
	     * allow '=' and ':' for hystorical reasons (MSDOS command.com
	     * allows only one '=' character per "set" command line. grrr. (jw)
	     */
      if (nextchar == '?' || (prefix == 1 && vim_strchr((char_u *)"=:&<", nextchar) == NULL && !(flags & P_BOOL)))
      {
        /*
		 * print value
		 */
        if (did_show)
          msg_putchar('\n'); /* cursor below last one */
        else
        {
          gotocmdline(TRUE); /* cursor at status line */
          did_show = TRUE;   /* remember that we did a line */
        }
        if (opt_idx >= 0)
        {
          showoneopt(&options[opt_idx], opt_flags);
#ifdef FEAT_EVAL
          if (p_verbose > 0)
          {
            /* Mention where the option was last set. */
            if (varp == options[opt_idx].var)
              last_set_msg(options[opt_idx].script_ctx);
            else if ((int)options[opt_idx].indir & PV_WIN)
              last_set_msg(curwin->w_p_script_ctx[(int)options[opt_idx].indir & PV_MASK]);
            else if ((int)options[opt_idx].indir & PV_BUF)
              last_set_msg(curbuf->b_p_script_ctx[(int)options[opt_idx].indir & PV_MASK]);
          }
#endif
        }
        else
        {
          char_u *p;

          p = find_termcode(key_name);
          if (p == NULL)
          {
            errmsg = N_("E846: Key code not set");
            goto skip;
          }
          else
            (void)show_one_termcode(key_name, p, TRUE);
        }
        if (nextchar != '?' && nextchar != NUL && !VIM_ISWHITE(afterchar))
          errmsg = e_trailing;
      }
      else
      {
        int value_is_replaced = !prepending && !adding && !removing;
        int value_checked = FALSE;

        if (flags & P_BOOL) /* boolean */
        {
          if (nextchar == '=' || nextchar == ':')
          {
            errmsg = e_invarg;
            goto skip;
          }

          /*
		     * ":set opt!": invert
		     * ":set opt&": reset to default value
		     * ":set opt<": reset to global value
		     */
          if (nextchar == '!')
            value = *(int *)(varp) ^ 1;
          else if (nextchar == '&')
            value = (int)(long)(long_i)options[opt_idx].def_val[((flags & P_VI_DEF) || cp_val)
                                                                    ? VI_DEFAULT
                                                                    : VIM_DEFAULT];
          else if (nextchar == '<')
          {
            /* For 'autoread' -1 means to use global value. */
            if ((int *)varp == &curbuf->b_p_ar && opt_flags == OPT_LOCAL)
              value = -1;
            else
              value = *(int *)get_varp_scope(&(options[opt_idx]),
                                             OPT_GLOBAL);
          }
          else
          {
            /*
			 * ":set invopt": invert
			 * ":set opt" or ":set noopt": set or reset
			 */
            if (nextchar != NUL && !VIM_ISWHITE(afterchar))
            {
              errmsg = e_trailing;
              goto skip;
            }
            if (prefix == 2) /* inv */
              value = *(int *)(varp) ^ 1;
            else
              value = prefix;
          }

          errmsg = set_bool_option(opt_idx, varp, (int)value,
                                   opt_flags);
        }
        else /* numeric or string */
        {
          if (vim_strchr((char_u *)"=:&<", nextchar) == NULL || prefix != 1)
          {
            errmsg = e_invarg;
            goto skip;
          }

          if (flags & P_NUM) /* numeric */
          {
            /*
			 * Different ways to set a number option:
			 * &	    set to default value
			 * <	    set to global value
			 * <xx>	    accept special key codes for 'wildchar'
			 * c	    accept any non-digit for 'wildchar'
			 * [-]0-9   set number
			 * other    error
			 */
            ++arg;
            if (nextchar == '&')
              value = (long)(long_i)options[opt_idx].def_val[((flags & P_VI_DEF) || cp_val)
                                                                 ? VI_DEFAULT
                                                                 : VIM_DEFAULT];
            else if (nextchar == '<')
            {
              /* For 'undolevels' NO_LOCAL_UNDOLEVEL means to
			     * use the global value. */
              if ((long *)varp == &curbuf->b_p_ul && opt_flags == OPT_LOCAL)
                value = NO_LOCAL_UNDOLEVEL;
              else
                value = *(long *)get_varp_scope(
                    &(options[opt_idx]), OPT_GLOBAL);
            }
            else if (((long *)varp == &p_wc || (long *)varp == &p_wcm) && (*arg == '<' || *arg == '^' || (*arg != NUL && (!arg[1] || VIM_ISWHITE(arg[1])) && !VIM_ISDIGIT(*arg))))
            {
              value = string_to_key(arg, FALSE);
              if (value == 0 && (long *)varp != &p_wcm)
              {
                errmsg = e_invarg;
                goto skip;
              }
            }
            else if (*arg == '-' || VIM_ISDIGIT(*arg))
            {
              /* Allow negative (for 'undolevels'), octal and
			     * hex numbers. */
              vim_str2nr(arg, NULL, &i, STR2NR_ALL,
                         &value, NULL, 0, TRUE);
              if (i == 0 || (arg[i] != NUL && !VIM_ISWHITE(arg[i])))
              {
                errmsg = N_("E521: Number required after =");
                goto skip;
              }
            }
            else
            {
              errmsg = N_("E521: Number required after =");
              goto skip;
            }

            if (adding)
              value = *(long *)varp + value;
            if (prepending)
              value = *(long *)varp * value;
            if (removing)
              value = *(long *)varp - value;
            errmsg = set_num_option(opt_idx, varp, value,
                                    errbuf, sizeof(errbuf), opt_flags);
          }
          else if (opt_idx >= 0) /* string */
          {
            char_u *save_arg = NULL;
            char_u *s = NULL;
            char_u *oldval = NULL; /* previous value if *varp */
            char_u *newval;
            char_u *origval = NULL;
#if defined(FEAT_EVAL)
            char_u *saved_origval = NULL;
            char_u *saved_newval = NULL;
#endif
            unsigned newlen;
            int comma;
            int bs;
            int new_value_alloced; /* new string option
							   was allocated */

            /* When using ":set opt=val" for a global option
			 * with a local value the local value will be
			 * reset, use the global value here. */
            if ((opt_flags & (OPT_LOCAL | OPT_GLOBAL)) == 0 && ((int)options[opt_idx].indir & PV_BOTH))
              varp = options[opt_idx].var;

            /* The old value is kept until we are sure that the
			 * new value is valid. */
            oldval = *(char_u **)varp;

            /* When setting the local value of a global
			 * option, the old value may be the global value. */
            if (((int)options[opt_idx].indir & PV_BOTH) && (opt_flags & OPT_LOCAL))
              origval = *(char_u **)get_varp(
                  &options[opt_idx]);
            else
              origval = oldval;

            if (nextchar == '&') /* set to default val */
            {
              newval = options[opt_idx].def_val[((flags & P_VI_DEF) || cp_val)
                                                    ? VI_DEFAULT
                                                    : VIM_DEFAULT];
              if ((char_u **)varp == &p_bg)
              {
                /* guess the value of 'background' */
                newval = term_bg_default();
              }

              /* expand environment variables and ~ (since the
			     * default value was already expanded, only
			     * required when an environment variable was set
			     * later */
              if (newval == NULL)
                newval = empty_option;
              else
              {
                s = option_expand(opt_idx, newval);
                if (s == NULL)
                  s = newval;
                newval = vim_strsave(s);
              }
              new_value_alloced = TRUE;
            }
            else if (nextchar == '<') /* set to global val */
            {
              newval = vim_strsave(*(char_u **)get_varp_scope(
                  &(options[opt_idx]), OPT_GLOBAL));
              new_value_alloced = TRUE;
            }
            else
            {
              ++arg; /* jump to after the '=' or ':' */

              /*
			     * Set 'keywordprg' to ":help" if an empty
			     * value was passed to :set by the user.
			     * Misuse errbuf[] for the resulting string.
			     */
              if (varp == (char_u *)&p_kp && (*arg == NUL || *arg == ' '))
              {
                STRCPY(errbuf, ":help");
                save_arg = arg;
                arg = (char_u *)errbuf;
              }
              /*
			     * Convert 'backspace' number to string, for
			     * adding, prepending and removing string.
			     */
              else if (varp == (char_u *)&p_bs && VIM_ISDIGIT(**(char_u **)varp))
              {
                i = getdigits((char_u **)varp);
                switch (i)
                {
                case 0:
                  *(char_u **)varp = empty_option;
                  break;
                case 1:
                  *(char_u **)varp = vim_strsave(
                      (char_u *)"indent,eol");
                  break;
                case 2:
                  *(char_u **)varp = vim_strsave(
                      (char_u *)"indent,eol,start");
                  break;
                }
                vim_free(oldval);
                if (origval == oldval)
                  origval = *(char_u **)varp;
                oldval = *(char_u **)varp;
              }
              /*
			     * Convert 'whichwrap' number to string, for
			     * backwards compatibility with Vim 3.0.
			     * Misuse errbuf[] for the resulting string.
			     */
              else if (varp == (char_u *)&p_ww && VIM_ISDIGIT(*arg))
              {
                *errbuf = NUL;
                i = getdigits(&arg);
                if (i & 1)
                  STRCAT(errbuf, "b,");
                if (i & 2)
                  STRCAT(errbuf, "s,");
                if (i & 4)
                  STRCAT(errbuf, "h,l,");
                if (i & 8)
                  STRCAT(errbuf, "<,>,");
                if (i & 16)
                  STRCAT(errbuf, "[,],");
                if (*errbuf != NUL) /* remove trailing , */
                  errbuf[STRLEN(errbuf) - 1] = NUL;
                save_arg = arg;
                arg = (char_u *)errbuf;
              }
              /*
			     * Remove '>' before 'dir' and 'bdir', for
			     * backwards compatibility with version 3.0
			     */
              else if (*arg == '>' && (varp == (char_u *)&p_dir || varp == (char_u *)&p_bdir))
              {
                ++arg;
              }

              /*
			     * Copy the new string into allocated memory.
			     * Can't use set_string_option_direct(), because
			     * we need to remove the backslashes.
			     */
              /* get a bit too much */
              newlen = (unsigned)STRLEN(arg) + 1;
              if (adding || prepending || removing)
                newlen += (unsigned)STRLEN(origval) + 1;
              newval = alloc(newlen);
              if (newval == NULL) /* out of mem, don't change */
                break;
              s = newval;

              /*
			     * Copy the string, skip over escaped chars.
			     * For MS-DOS and WIN32 backslashes before normal
			     * file name characters are not removed, and keep
			     * backslash at start, for "\\machine\path", but
			     * do remove it for "\\\\machine\\path".
			     * The reverse is found in ExpandOldSetting().
			     */
              while (*arg && !VIM_ISWHITE(*arg))
              {
                if (*arg == '\\' && arg[1] != NUL
#ifdef BACKSLASH_IN_FILENAME
                    && !((flags & P_EXPAND) && vim_isfilec(arg[1]) && (arg[1] != '\\' || (s == newval && arg[2] != '\\')))
#endif
                )
                  ++arg; /* remove backslash */
                if (has_mbyte && (i = (*mb_ptr2len)(arg)) > 1)
                {
                  /* copy multibyte char */
                  mch_memmove(s, arg, (size_t)i);
                  arg += i;
                  s += i;
                }
                else
                  *s++ = *arg++;
              }
              *s = NUL;

              /*
			     * Expand environment variables and ~.
			     * Don't do it when adding without inserting a
			     * comma.
			     */
              if (!(adding || prepending || removing) || (flags & P_COMMA))
              {
                s = option_expand(opt_idx, newval);
                if (s != NULL)
                {
                  vim_free(newval);
                  newlen = (unsigned)STRLEN(s) + 1;
                  if (adding || prepending || removing)
                    newlen += (unsigned)STRLEN(origval) + 1;
                  newval = alloc(newlen);
                  if (newval == NULL)
                    break;
                  STRCPY(newval, s);
                }
              }

              /* locate newval[] in origval[] when removing it
			     * and when adding to avoid duplicates */
              i = 0; /* init for GCC */
              if (removing || (flags & P_NODUP))
              {
                i = (int)STRLEN(newval);
                bs = 0;
                for (s = origval; *s; ++s)
                {
                  if ((!(flags & P_COMMA) || s == origval || (s[-1] == ',' && !(bs & 1))) && STRNCMP(s, newval, i) == 0 && (!(flags & P_COMMA) || s[i] == ',' || s[i] == NUL))
                    break;
                  /* Count backslashes.  Only a comma with an
				     * even number of backslashes or a single
				     * backslash preceded by a comma before it
				     * is recognized as a separator */
                  if ((s > origval + 1 && s[-1] == '\\' && s[-2] != ',') || (s == origval + 1 && s[-1] == '\\'))

                    ++bs;
                  else
                    bs = 0;
                }

                /* do not add if already there */
                if ((adding || prepending) && *s)
                {
                  prepending = FALSE;
                  adding = FALSE;
                  STRCPY(newval, origval);
                }
              }

              /* concatenate the two strings; add a ',' if
			     * needed */
              if (adding || prepending)
              {
                comma = ((flags & P_COMMA) && *origval != NUL && *newval != NUL);
                if (adding)
                {
                  i = (int)STRLEN(origval);
                  /* strip a trailing comma, would get 2 */
                  if (comma && i > 1 && (flags & P_ONECOMMA) == P_ONECOMMA && origval[i - 1] == ',' && origval[i - 2] != '\\')
                    i--;
                  mch_memmove(newval + i + comma, newval,
                              STRLEN(newval) + 1);
                  mch_memmove(newval, origval, (size_t)i);
                }
                else
                {
                  i = (int)STRLEN(newval);
                  STRMOVE(newval + i + comma, origval);
                }
                if (comma)
                  newval[i] = ',';
              }

              /* Remove newval[] from origval[]. (Note: "i" has
			     * been set above and is used here). */
              if (removing)
              {
                STRCPY(newval, origval);
                if (*s)
                {
                  /* may need to remove a comma */
                  if (flags & P_COMMA)
                  {
                    if (s == origval)
                    {
                      /* include comma after string */
                      if (s[i] == ',')
                        ++i;
                    }
                    else
                    {
                      /* include comma before string */
                      --s;
                      ++i;
                    }
                  }
                  STRMOVE(newval + (s - origval), s + i);
                }
              }

              if (flags & P_FLAGLIST)
              {
                /* Remove flags that appear twice. */
                for (s = newval; *s;)
                {
                  /* if options have P_FLAGLIST and
				     * P_ONECOMMA such as 'whichwrap' */
                  if (flags & P_ONECOMMA)
                  {
                    if (*s != ',' && *(s + 1) == ',' && vim_strchr(s + 2, *s) != NULL)
                    {
                      /* Remove the duplicated value and
					     * the next comma. */
                      STRMOVE(s, s + 2);
                      continue;
                    }
                  }
                  else
                  {
                    if ((!(flags & P_COMMA) || *s != ',') && vim_strchr(s + 1, *s) != NULL)
                    {
                      STRMOVE(s, s + 1);
                      continue;
                    }
                  }
                  ++s;
                }
              }

              if (save_arg != NULL) /* number for 'whichwrap' */
                arg = save_arg;
              new_value_alloced = TRUE;
            }

            /*
			 * Set the new value.
			 */
            *(char_u **)(varp) = newval;

#if defined(FEAT_EVAL)
            if (!starting && origval != NULL && newval != NULL)
            {
              /* origval may be freed by
			     * did_set_string_option(), make a copy. */
              saved_origval = vim_strsave(origval);
              /* newval (and varp) may become invalid if the
			     * buffer is closed by autocommands. */
              saved_newval = vim_strsave(newval);
            }
#endif

            {
              long_u *p = insecure_flag(opt_idx, opt_flags);
              int secure_saved = secure;

              // When an option is set in the sandbox, from a
              // modeline or in secure mode, then deal with side
              // effects in secure mode.  Also when the value was
              // set with the P_INSECURE flag and is not
              // completely replaced.
              if ((opt_flags & OPT_MODELINE)
#ifdef HAVE_SANDBOX
                  || sandbox != 0
#endif
                  || (!value_is_replaced && (*p & P_INSECURE)))
                secure = 1;

              // Handle side effects, and set the global value
              // for ":set" on local options. Note: when setting
              // 'syntax' or 'filetype' autocommands may be
              // triggered that can cause havoc.
              errmsg = did_set_string_option(
                  opt_idx, (char_u **)varp,
                  new_value_alloced, oldval, errbuf,
                  opt_flags, &value_checked);

              secure = secure_saved;
            }

#if defined(FEAT_EVAL)
            if (errmsg == NULL)
              trigger_optionsset_string(opt_idx, opt_flags,
                                        saved_origval, saved_newval);
            vim_free(saved_origval);
            vim_free(saved_newval);
#endif
            /* If error detected, print the error message. */
            if (errmsg != NULL)
              goto skip;
          }
          else /* key code option */
          {
            char_u *p;

            if (nextchar == '&')
            {
              if (add_termcap_entry(key_name, TRUE) == FAIL)
                errmsg = N_("E522: Not found in termcap");
            }
            else
            {
              ++arg; /* jump to after the '=' or ':' */
              for (p = arg; *p && !VIM_ISWHITE(*p); ++p)
                if (*p == '\\' && p[1] != NUL)
                  ++p;
              nextchar = *p;
              *p = NUL;
              add_termcode(key_name, arg, FALSE);
              *p = nextchar;
            }
            if (full_screen)
              ttest(FALSE);
            redraw_all_later(CLEAR);
          }
        }

        if (opt_idx >= 0)
          did_set_option(
              opt_idx, opt_flags, value_is_replaced, value_checked);
      }

    skip:
      /*
	     * Advance to next argument.
	     * - skip until a blank found, taking care of backslashes
	     * - skip blanks
	     * - skip one "=val" argument (for hidden options ":set gfn =xx")
	     */
      for (i = 0; i < 2; ++i)
      {
        while (*arg != NUL && !VIM_ISWHITE(*arg))
          if (*arg++ == '\\' && *arg != NUL)
            ++arg;
        arg = skipwhite(arg);
        if (*arg != '=')
          break;
      }
    }

    if (errmsg != NULL)
    {
      vim_strncpy(IObuff, (char_u *)_(errmsg), IOSIZE - 1);
      i = (int)STRLEN(IObuff) + 2;
      if (i + (arg - startarg) < IOSIZE)
      {
        /* append the argument with the error */
        STRCAT(IObuff, ": ");
        mch_memmove(IObuff + i, startarg, (arg - startarg));
        IObuff[i + (arg - startarg)] = NUL;
      }
      /* make sure all characters are printable */
      trans_characters(IObuff, IOSIZE);

      ++no_wait_return;     // wait_return done later
      emsg((char *)IObuff); // show error highlighted
      --no_wait_return;

      return FAIL;
    }

    arg = skipwhite(arg);
  }

theend:
  if (silent_mode && did_show)
  {
    /* After displaying option values in silent mode. */
    silent_mode = FALSE;
    info_message = TRUE; /* use mch_msg(), not mch_errmsg() */
    msg_putchar('\n');
    cursor_on(); /* msg_start() switches it off */
    silent_mode = TRUE;
    info_message = FALSE; /* use mch_msg(), not mch_errmsg() */
  }

  return OK;
}

/*
 * Call this when an option has been given a new value through a user command.
 * Sets the P_WAS_SET flag and takes care of the P_INSECURE flag.
 */
static void
did_set_option(
    int opt_idx,
    int opt_flags,     // possibly with OPT_MODELINE
    int new_value,     // value was replaced completely
    int value_checked) // value was checked to be safe, no need to set the
                       // P_INSECURE flag.
{
  long_u *p;

  options[opt_idx].flags |= P_WAS_SET;

  /* When an option is set in the sandbox, from a modeline or in secure mode
     * set the P_INSECURE flag.  Otherwise, if a new value is stored reset the
     * flag. */
  p = insecure_flag(opt_idx, opt_flags);
  if (!value_checked && (secure
#ifdef HAVE_SANDBOX
                         || sandbox != 0
#endif
                         || (opt_flags & OPT_MODELINE)))
    *p = *p | P_INSECURE;
  else if (new_value)
    *p = *p & ~P_INSECURE;
}

static char *
illegal_char(char *errbuf, int c)
{
  if (errbuf == NULL)
    return "";
  sprintf((char *)errbuf, _("E539: Illegal character <%s>"),
          (char *)transchar(c));
  return errbuf;
}

/*
 * Convert a key name or string into a key value.
 * Used for 'wildchar' and 'cedit' options.
 * When "multi_byte" is TRUE allow for multi-byte characters.
 */
int string_to_key(char_u *arg, int multi_byte)
{
  if (*arg == '<')
    return find_key_option(arg + 1, TRUE);
  if (*arg == '^')
    return Ctrl_chr(arg[1]);
  if (multi_byte)
    return PTR2CHAR(arg);
  return *arg;
}

/*
 * set_options_bin -  called when 'bin' changes value.
 */
void set_options_bin(
    int oldval,
    int newval,
    int opt_flags) /* OPT_LOCAL and/or OPT_GLOBAL */
{
  /*
     * The option values that are changed when 'bin' changes are
     * copied when 'bin is set and restored when 'bin' is reset.
     */
  if (newval)
  {
    if (!oldval) /* switched on */
    {
      if (!(opt_flags & OPT_GLOBAL))
      {
        curbuf->b_p_tw_nobin = curbuf->b_p_tw;
        curbuf->b_p_wm_nobin = curbuf->b_p_wm;
        curbuf->b_p_ml_nobin = curbuf->b_p_ml;
        curbuf->b_p_et_nobin = curbuf->b_p_et;
      }
      if (!(opt_flags & OPT_LOCAL))
      {
        p_tw_nobin = p_tw;
        p_wm_nobin = p_wm;
        p_ml_nobin = p_ml;
        p_et_nobin = p_et;
      }
    }

    if (!(opt_flags & OPT_GLOBAL))
    {
      curbuf->b_p_tw = 0; /* no automatic line wrap */
      curbuf->b_p_wm = 0; /* no automatic line wrap */
      curbuf->b_p_ml = 0; /* no modelines */
      curbuf->b_p_et = 0; /* no expandtab */
    }
    if (!(opt_flags & OPT_LOCAL))
    {
      p_tw = 0;
      p_wm = 0;
      p_ml = FALSE;
      p_et = FALSE;
      p_bin = TRUE; /* needed when called for the "-b" argument */
    }
  }
  else if (oldval) /* switched off */
  {
    if (!(opt_flags & OPT_GLOBAL))
    {
      curbuf->b_p_tw = curbuf->b_p_tw_nobin;
      curbuf->b_p_wm = curbuf->b_p_wm_nobin;
      curbuf->b_p_ml = curbuf->b_p_ml_nobin;
      curbuf->b_p_et = curbuf->b_p_et_nobin;
    }
    if (!(opt_flags & OPT_LOCAL))
    {
      p_tw = p_tw_nobin;
      p_wm = p_wm_nobin;
      p_ml = p_ml_nobin;
      p_et = p_et_nobin;
    }
  }
}

#ifdef FEAT_VIMINFO
/*
 * Find the parameter represented by the given character (eg ', :, ", or /),
 * and return its associated value in the 'viminfo' string.
 * Only works for number parameters, not for 'r' or 'n'.
 * If the parameter is not specified in the string or there is no following
 * number, return -1.
 */
int get_viminfo_parameter(int type)
{
  char_u *p;

  p = find_viminfo_parameter(type);
  if (p != NULL && VIM_ISDIGIT(*p))
    return atoi((char *)p);
  return -1;
}

/*
 * Find the parameter represented by the given character (eg ''', ':', '"', or
 * '/') in the 'viminfo' option and return a pointer to the string after it.
 * Return NULL if the parameter is not specified in the string.
 */
char_u *
find_viminfo_parameter(int type)
{
  char_u *p;

  for (p = p_viminfo; *p; ++p)
  {
    if (*p == type)
      return p + 1;
    if (*p == 'n') /* 'n' is always the last one */
      break;
    p = vim_strchr(p, ','); /* skip until next ',' */
    if (p == NULL)          /* hit the end without finding parameter */
      break;
  }
  return NULL;
}
#endif

/*
 * Expand environment variables for some string options.
 * These string options cannot be indirect!
 * If "val" is NULL expand the current value of the option.
 * Return pointer to NameBuff, or NULL when not expanded.
 */
static char_u *
option_expand(int opt_idx, char_u *val)
{
  /* if option doesn't need expansion nothing to do */
  if (!(options[opt_idx].flags & P_EXPAND) || options[opt_idx].var == NULL)
    return NULL;

  /* If val is longer than MAXPATHL no meaningful expansion can be done,
     * expand_env() would truncate the string. */
  if (val != NULL && STRLEN(val) > MAXPATHL)
    return NULL;

  if (val == NULL)
    val = *(char_u **)options[opt_idx].var;

  /*
     * Expanding this with NameBuff, expand_env() must not be passed IObuff.
     * Escape spaces when expanding 'tags', they are used to separate file
     * names.
     * For 'spellsuggest' expand after "file:".
     */
  expand_env_esc(val, NameBuff, MAXPATHL,
                 (char_u **)options[opt_idx].var == &p_tags, FALSE,
                 NULL);
  if (STRCMP(NameBuff, val) == 0) /* they are the same */
    return NULL;

  return NameBuff;
}

/*
 * After setting various option values: recompute variables that depend on
 * option values.
 */
static void
didset_options(void)
{
  /* initialize the table for 'iskeyword' et.al. */
  (void)init_chartab();

  (void)opt_strings_flags(p_cmp, p_cmp_values, &cmp_flags, TRUE);
  (void)opt_strings_flags(p_bkc, p_bkc_values, &bkc_flags, TRUE);
  (void)opt_strings_flags(p_bo, p_bo_values, &bo_flags, TRUE);
#ifdef FEAT_SESSION
  (void)opt_strings_flags(p_ssop, p_ssop_values, &ssop_flags, TRUE);
  (void)opt_strings_flags(p_vop, p_ssop_values, &vop_flags, TRUE);
#endif
#ifdef FEAT_FOLDING
  (void)opt_strings_flags(p_fdo, p_fdo_values, &fdo_flags, TRUE);
#endif
  (void)opt_strings_flags(p_dy, p_dy_values, &dy_flags, TRUE);
  (void)opt_strings_flags(p_tc, p_tc_values, &tc_flags, FALSE);
  (void)opt_strings_flags(p_ve, p_ve_values, &ve_flags, TRUE);
#if defined(FEAT_TOOLBAR)
  (void)opt_strings_flags(p_toolbar, p_toolbar_values, &toolbar_flags, TRUE);
#endif
#ifdef FEAT_LINEBREAK
  briopt_check(curwin);
#endif
#ifdef FEAT_LINEBREAK
  /* initialize the table for 'breakat'. */
  fill_breakat_flags();
#endif
}

/*
 * More side effects of setting options.
 */
static void
didset_options2(void)
{
  /* Initialize the highlight_attr[] table. */
  (void)highlight_changed();

  /* Parse default for 'wildmode'  */
  check_opt_wim();

  (void)set_chars_option(&p_lcs);
  /* Parse default for 'fillchars'. */
  (void)set_chars_option(&p_fcs);

#ifdef FEAT_VARTABS
  vim_free(curbuf->b_p_vsts_array);
  tabstop_set(curbuf->b_p_vsts, &curbuf->b_p_vsts_array);
  vim_free(curbuf->b_p_vts_array);
  tabstop_set(curbuf->b_p_vts, &curbuf->b_p_vts_array);
#endif
}

/*
 * Check for string options that are NULL (normally only termcap options).
 */
void check_options(void)
{
  int opt_idx;

  for (opt_idx = 0; options[opt_idx].fullname != NULL; opt_idx++)
    if ((options[opt_idx].flags & P_STRING) && options[opt_idx].var != NULL)
      check_string_option((char_u **)get_varp(&(options[opt_idx])));
}

/*
 * Check string options in a buffer for NULL value.
 */
void check_buf_options(buf_T *buf)
{
  check_string_option(&buf->b_p_bh);
  check_string_option(&buf->b_p_bt);
  check_string_option(&buf->b_p_fenc);
  check_string_option(&buf->b_p_ff);
#ifdef FEAT_FIND_ID
  check_string_option(&buf->b_p_def);
  check_string_option(&buf->b_p_inc);
#ifdef FEAT_EVAL
  check_string_option(&buf->b_p_inex);
#endif
#endif
#if defined(FEAT_BEVAL) && defined(FEAT_EVAL)
  check_string_option(&buf->b_p_bexpr);
#endif
  check_string_option(&buf->b_p_fp);
#if defined(FEAT_EVAL)
  check_string_option(&buf->b_p_fex);
#endif
  check_string_option(&buf->b_p_kp);
  check_string_option(&buf->b_p_mps);
  check_string_option(&buf->b_p_fo);
  check_string_option(&buf->b_p_flp);
  check_string_option(&buf->b_p_isk);
#ifdef FEAT_COMMENTS
  check_string_option(&buf->b_p_com);
#endif
#ifdef FEAT_FOLDING
  check_string_option(&buf->b_p_cms);
#endif
  check_string_option(&buf->b_p_nf);
#ifdef FEAT_TEXTOBJ
  check_string_option(&buf->b_p_qe);
#endif
#ifdef FEAT_SEARCHPATH
  check_string_option(&buf->b_p_sua);
#endif
  check_string_option(&buf->b_p_ft);
#if defined(FEAT_SMARTINDENT)
  check_string_option(&buf->b_p_cinw);
#endif
#ifdef FEAT_EVAL
  check_string_option(&buf->b_p_tfu);
#endif
#ifdef FEAT_KEYMAP
  check_string_option(&buf->b_p_keymap);
#endif
#ifdef FEAT_QUICKFIX
  check_string_option(&buf->b_p_gp);
  check_string_option(&buf->b_p_mp);
  check_string_option(&buf->b_p_efm);
#endif
  check_string_option(&buf->b_p_ep);
  check_string_option(&buf->b_p_path);
  check_string_option(&buf->b_p_tags);
  check_string_option(&buf->b_p_tc);
  check_string_option(&buf->b_p_bkc);
  check_string_option(&buf->b_p_menc);
#ifdef FEAT_VARTABS
  check_string_option(&buf->b_p_vsts);
  check_string_option(&buf->b_p_vts);
#endif
}

/*
 * Free the string allocated for an option.
 * Checks for the string being empty_option. This may happen if we're out of
 * memory, vim_strsave() returned NULL, which was replaced by empty_option by
 * check_options().
 * Does NOT check for P_ALLOCED flag!
 */
void free_string_option(char_u *p)
{
  if (p != empty_option)
    vim_free(p);
}

void clear_string_option(char_u **pp)
{
  if (*pp != empty_option)
    vim_free(*pp);
  *pp = empty_option;
}

static void
check_string_option(char_u **pp)
{
  if (*pp == NULL)
    *pp = empty_option;
}

/*
 * Return the option index found by a pointer into term_strings[].
 * Return -1 if not found.
 */
int get_term_opt_idx(char_u **p)
{
  int opt_idx;

  for (opt_idx = 1; options[opt_idx].fullname != NULL; opt_idx++)
    if (options[opt_idx].var == (char_u *)p)
      return opt_idx;
  return -1; // cannot happen: didn't find it!
}

/*
 * Mark a terminal option as allocated, found by a pointer into term_strings[].
 * Return the option index or -1 if not found.
 */
int set_term_option_alloced(char_u **p)
{
  int opt_idx = get_term_opt_idx(p);

  if (opt_idx >= 0)
    options[opt_idx].flags |= P_ALLOCED;
  return opt_idx;
}

#if defined(FEAT_EVAL) || defined(PROTO)
/*
 * Return TRUE when option "opt" was set from a modeline or in secure mode.
 * Return FALSE when it wasn't.
 * Return -1 for an unknown option.
 */
int was_set_insecurely(char_u *opt, int opt_flags)
{
  int idx = findoption(opt);
  long_u *flagp;

  if (idx >= 0)
  {
    flagp = insecure_flag(idx, opt_flags);
    return (*flagp & P_INSECURE) != 0;
  }
  internal_error("was_set_insecurely()");
  return -1;
}

/*
 * Get a pointer to the flags used for the P_INSECURE flag of option
 * "opt_idx".  For some local options a local flags field is used.
 */
static long_u *
insecure_flag(int opt_idx, int opt_flags)
{
  if (opt_flags & OPT_LOCAL)
    switch ((int)options[opt_idx].indir)
    {
#ifdef FEAT_EVAL
#ifdef FEAT_FOLDING
    case PV_FDE:
      return &curwin->w_p_fde_flags;
    case PV_FDT:
      return &curwin->w_p_fdt_flags;
#endif
#ifdef FEAT_BEVAL
    case PV_BEXPR:
      return &curbuf->b_p_bexpr_flags;
#endif
    case PV_FEX:
      return &curbuf->b_p_fex_flags;
#ifdef FEAT_FIND_ID
    case PV_INEX:
      return &curbuf->b_p_inex_flags;
#endif
#endif
    }

  /* Nothing special, return global flags field. */
  return &options[opt_idx].flags;
}
#endif

/*
 * Set a string option to a new value (without checking the effect).
 * The string is copied into allocated memory.
 * if ("opt_idx" == -1) "name" is used, otherwise "opt_idx" is used.
 * When "set_sid" is zero set the scriptID to current_sctx.sc_sid.  When
 * "set_sid" is SID_NONE don't set the scriptID.  Otherwise set the scriptID to
 * "set_sid".
 */
void set_string_option_direct(
    char_u *name,
    int opt_idx,
    char_u *val,
    int opt_flags, /* OPT_FREE, OPT_LOCAL and/or OPT_GLOBAL */
    int set_sid UNUSED)
{
  char_u *s;
  char_u **varp;
  int both = (opt_flags & (OPT_LOCAL | OPT_GLOBAL)) == 0;
  int idx = opt_idx;

  if (idx == -1) /* use name */
  {
    idx = findoption(name);
    if (idx < 0) /* not found (should not happen) */
    {
      semsg(_(e_intern2), "set_string_option_direct()");
      siemsg(_("For option %s"), name);
      return;
    }
  }

  if (options[idx].var == NULL) /* can't set hidden option */
    return;

  s = vim_strsave(val);
  if (s != NULL)
  {
    varp = (char_u **)get_varp_scope(&(options[idx]),
                                     both ? OPT_LOCAL : opt_flags);
    if ((opt_flags & OPT_FREE) && (options[idx].flags & P_ALLOCED))
      free_string_option(*varp);
    *varp = s;

    /* For buffer/window local option may also set the global value. */
    if (both)
      set_string_option_global(idx, varp);

    options[idx].flags |= P_ALLOCED;

    /* When setting both values of a global option with a local value,
	 * make the local value empty, so that the global value is used. */
    if (((int)options[idx].indir & PV_BOTH) && both)
    {
      free_string_option(*varp);
      *varp = empty_option;
    }
#ifdef FEAT_EVAL
    if (set_sid != SID_NONE)
    {
      sctx_T script_ctx;

      if (set_sid == 0)
        script_ctx = current_sctx;
      else
      {
        script_ctx.sc_sid = set_sid;
        script_ctx.sc_seq = 0;
        script_ctx.sc_lnum = 0;
        script_ctx.sc_version = 1;
      }
      set_option_sctx_idx(idx, opt_flags, script_ctx);
    }
#endif
  }
}

/*
 * Like set_string_option_direct(), but for a window-local option in "wp".
 * Blocks autocommands to avoid the old curwin becoming invalid.
 */
void set_string_option_direct_in_win(
    win_T *wp,
    char_u *name,
    int opt_idx,
    char_u *val,
    int opt_flags,
    int set_sid)
{
  win_T *save_curwin = curwin;

  block_autocmds();
  curwin = wp;
  curbuf = curwin->w_buffer;
  set_string_option_direct(name, opt_idx, val, opt_flags, set_sid);
  curwin = save_curwin;
  curbuf = curwin->w_buffer;
  unblock_autocmds();
}

/*
 * Like set_string_option_direct(), but for a buffer-local option in "buf".
 * Blocks autocommands to avoid the old curbuf becoming invalid.
 */
void set_string_option_direct_in_buf(
    buf_T *buf,
    char_u *name,
    int opt_idx,
    char_u *val,
    int opt_flags,
    int set_sid)
{
  buf_T *save_curbuf = curbuf;

  block_autocmds();
  curbuf = buf;
  curwin->w_buffer = curbuf;
  set_string_option_direct(name, opt_idx, val, opt_flags, set_sid);
  curbuf = save_curbuf;
  curwin->w_buffer = curbuf;
  unblock_autocmds();
}

/*
 * Set global value for string option when it's a local option.
 */
static void
set_string_option_global(
    int opt_idx,   /* option index */
    char_u **varp) /* pointer to option variable */
{
  char_u **p, *s;

  /* the global value is always allocated */
  if (options[opt_idx].var == VAR_WIN)
    p = (char_u **)GLOBAL_WO(varp);
  else
    p = (char_u **)options[opt_idx].var;
  if (options[opt_idx].indir != PV_NONE && p != varp && (s = vim_strsave(*varp)) != NULL)
  {
    free_string_option(*p);
    *p = s;
  }
}

/*
 * Set a string option to a new value, and handle the effects.
 *
 * Returns NULL on success or error message on error.
 */
static char *
set_string_option(
    int opt_idx,
    char_u *value,
    int opt_flags) /* OPT_LOCAL and/or OPT_GLOBAL */
{
  char_u *s;
  char_u **varp;
  char_u *oldval;
#if defined(FEAT_EVAL)
  char_u *saved_oldval = NULL;
  char_u *saved_newval = NULL;
#endif
  char *r = NULL;
  int value_checked = FALSE;

  if (options[opt_idx].var == NULL) /* don't set hidden option */
    return NULL;

  s = vim_strsave(value);
  if (s != NULL)
  {
    varp = (char_u **)get_varp_scope(&(options[opt_idx]),
                                     (opt_flags & (OPT_LOCAL | OPT_GLOBAL)) == 0
                                         ? (((int)options[opt_idx].indir & PV_BOTH)
                                                ? OPT_GLOBAL
                                                : OPT_LOCAL)
                                         : opt_flags);
    oldval = *varp;
    *varp = s;

#if defined(FEAT_EVAL)
    if (!starting)
    {
      saved_oldval = vim_strsave(oldval);
      saved_newval = vim_strsave(s);
    }
#endif
    if ((r = did_set_string_option(opt_idx, varp, TRUE, oldval, NULL,
                                   opt_flags, &value_checked)) == NULL)
      did_set_option(opt_idx, opt_flags, TRUE, value_checked);

#if defined(FEAT_EVAL)
    /* call autocommand after handling side effects */
    if (r == NULL)
      trigger_optionsset_string(opt_idx, opt_flags,
                                saved_oldval, saved_newval);
    vim_free(saved_oldval);
    vim_free(saved_newval);
#endif
  }
  return r;
}

/*
 * Return TRUE if "val" is a valid name: only consists of alphanumeric ASCII
 * characters or characters in "allowed".
 */
static int
valid_name(char_u *val, char *allowed)
{
  char_u *s;

  for (s = val; *s != NUL; ++s)
    if (!ASCII_ISALNUM(*s) && vim_strchr((char_u *)allowed, *s) == NULL)
      return FALSE;
  return TRUE;
}

/*
 * Return TRUE if "val" is a valid 'filetype' name.
 * Also used for 'syntax' and 'keymap'.
 */
static int
valid_filetype(char_u *val)
{
  return valid_name(val, ".-_");
}

/*
 * Handle string options that need some action to perform when changed.
 * Returns NULL for success, or an error message for an error.
 */
static char *
did_set_string_option(
    int opt_idx,           // index in options[] table
    char_u **varp,         // pointer to the option variable
    int new_value_alloced, // new value was allocated
    char_u *oldval,        // previous value of the option
    char *errbuf,          // buffer for errors, or NULL
    int opt_flags,         // OPT_LOCAL and/or OPT_GLOBAL
    int *value_checked)    // value was checked to be save, no
                           // need to set P_INSECURE
{
  char *errmsg = NULL;
  char_u *s, *p;
  int did_chartab = FALSE;
  char_u **gvarp;
  long_u free_oldval = (options[opt_idx].flags & P_ALLOCED);
  int value_changed = FALSE;

  /* Get the global option to compare with, otherwise we would have to check
     * two values for all local options. */
  gvarp = (char_u **)get_varp_scope(&(options[opt_idx]), OPT_GLOBAL);

  /* Disallow changing some options from secure mode */
  if ((secure
#ifdef HAVE_SANDBOX
       || sandbox != 0
#endif
       ) &&
      (options[opt_idx].flags & P_SECURE))
    errmsg = e_secure;

  // Check for a "normal" directory or file name in some options.  Disallow a
  // path separator (slash and/or backslash), wildcards and characters that
  // are often illegal in a file name. Be more permissive if "secure" is off.
  else if (((options[opt_idx].flags & P_NFNAME) && vim_strpbrk(*varp, (char_u *)(secure
                                                                                     ? "/\\*?[|;&<>\r\n"
                                                                                     : "/\\*?[<>\r\n")) != NULL) ||
           ((options[opt_idx].flags & P_NDNAME) && vim_strpbrk(*varp, (char_u *)"*?[|;&<>\r\n") != NULL))
    errmsg = e_invarg;

  /* 'term' */
  else if (varp == &T_NAME)
  {
    if (T_NAME[0] == NUL)
      errmsg = N_("E529: Cannot set 'term' to empty string");
    else if (set_termname(T_NAME) == FAIL)
      errmsg = N_("E522: Not found in termcap");
    else
    {
      /* Screen colors may have changed. */
      redraw_later_clear();

      /* Both 'term' and 'ttytype' point to T_NAME, only set the
	     * P_ALLOCED flag on 'term'. */
      opt_idx = findoption((char_u *)"term");
      free_oldval = (options[opt_idx].flags & P_ALLOCED);
    }
  }

  /* 'backupcopy' */
  else if (gvarp == &p_bkc)
  {
    char_u *bkc = p_bkc;
    unsigned int *flags = &bkc_flags;

    if (opt_flags & OPT_LOCAL)
    {
      bkc = curbuf->b_p_bkc;
      flags = &curbuf->b_bkc_flags;
    }

    if ((opt_flags & OPT_LOCAL) && *bkc == NUL)
      /* make the local value empty: use the global value */
      *flags = 0;
    else
    {
      if (opt_strings_flags(bkc, p_bkc_values, flags, TRUE) != OK)
        errmsg = e_invarg;
      if ((((int)*flags & BKC_AUTO) != 0) + (((int)*flags & BKC_YES) != 0) + (((int)*flags & BKC_NO) != 0) != 1)
      {
        /* Must have exactly one of "auto", "yes"  and "no". */
        (void)opt_strings_flags(oldval, p_bkc_values, flags, TRUE);
        errmsg = e_invarg;
      }
    }
  }

  /* 'backupext' and 'patchmode' */
  else if (varp == &p_bex || varp == &p_pm)
  {
    if (STRCMP(*p_bex == '.' ? p_bex + 1 : p_bex,
               *p_pm == '.' ? p_pm + 1 : p_pm) == 0)
      errmsg = N_("E589: 'backupext' and 'patchmode' are equal");
  }
#ifdef FEAT_LINEBREAK
  /* 'breakindentopt' */
  else if (varp == &curwin->w_p_briopt)
  {
    if (briopt_check(curwin) == FAIL)
      errmsg = e_invarg;
  }
#endif

  /*
     * 'isident', 'iskeyword', 'isprint or 'isfname' option: refill g_chartab[]
     * If the new option is invalid, use old value.  'lisp' option: refill
     * g_chartab[] for '-' char
     */
  else if (varp == &p_isi || varp == &(curbuf->b_p_isk) || varp == &p_isp || varp == &p_isf)
  {
    if (init_chartab() == FAIL)
    {
      did_chartab = TRUE; /* need to restore it below */
      errmsg = e_invarg;  /* error in value */
    }
  }

  /* 'helpfile' */
  else if (varp == &p_hf)
  {
    /* May compute new values for $VIM and $VIMRUNTIME */
    if (didset_vim)
    {
      vim_setenv((char_u *)"VIM", (char_u *)"");
      didset_vim = FALSE;
    }
    if (didset_vimruntime)
    {
      vim_setenv((char_u *)"VIMRUNTIME", (char_u *)"");
      didset_vimruntime = FALSE;
    }
  }

#ifdef FEAT_MULTI_LANG
  /* 'helplang' */
  else if (varp == &p_hlg)
  {
    /* Check for "", "ab", "ab,cd", etc. */
    for (s = p_hlg; *s != NUL; s += 3)
    {
      if (s[1] == NUL || ((s[2] != ',' || s[3] == NUL) && s[2] != NUL))
      {
        errmsg = e_invarg;
        break;
      }
      if (s[2] == NUL)
        break;
    }
  }
#endif

  /* 'highlight' */
  else if (varp == &p_hl)
  {
    if (highlight_changed() == FAIL)
      errmsg = e_invarg; /* invalid flags */
  }

  /* 'nrformats' */
  else if (gvarp == &p_nf)
  {
    if (check_opt_strings(*varp, p_nf_values, TRUE) != OK)
      errmsg = e_invarg;
  }

#ifdef FEAT_SESSION
  /* 'sessionoptions' */
  else if (varp == &p_ssop)
  {
    if (opt_strings_flags(p_ssop, p_ssop_values, &ssop_flags, TRUE) != OK)
      errmsg = e_invarg;
    if ((ssop_flags & SSOP_CURDIR) && (ssop_flags & SSOP_SESDIR))
    {
      /* Don't allow both "sesdir" and "curdir". */
      (void)opt_strings_flags(oldval, p_ssop_values, &ssop_flags, TRUE);
      errmsg = e_invarg;
    }
  }
  /* 'viewoptions' */
  else if (varp == &p_vop)
  {
    if (opt_strings_flags(p_vop, p_ssop_values, &vop_flags, TRUE) != OK)
      errmsg = e_invarg;
  }
#endif

  /* 'scrollopt' */
  else if (varp == &p_sbo)
  {
    if (check_opt_strings(p_sbo, p_scbopt_values, TRUE) != OK)
      errmsg = e_invarg;
  }

  /* 'ambiwidth' */
  else if (varp == &p_ambw || varp == &p_emoji)
  {
    if (check_opt_strings(p_ambw, p_ambw_values, FALSE) != OK)
      errmsg = e_invarg;
    else if (set_chars_option(&p_lcs) != NULL)
      errmsg = _("E834: Conflicts with value of 'listchars'");
    else if (set_chars_option(&p_fcs) != NULL)
      errmsg = _("E835: Conflicts with value of 'fillchars'");
  }

  /* 'background' */
  else if (varp == &p_bg)
  {
    if (check_opt_strings(p_bg, p_bg_values, FALSE) == OK)
    {
#ifdef FEAT_EVAL
      int dark = (*p_bg == 'd');
#endif

      init_highlight(FALSE, FALSE);

#ifdef FEAT_EVAL
      if (dark != (*p_bg == 'd') && get_var_value((char_u *)"g:colors_name") != NULL)
      {
        /* The color scheme must have set 'background' back to another
		 * value, that's not what we want here.  Disable the color
		 * scheme and set the colors again. */
        do_unlet((char_u *)"g:colors_name", TRUE);
        free_string_option(p_bg);
        p_bg = vim_strsave((char_u *)(dark ? "dark" : "light"));
        check_string_option(&p_bg);
        init_highlight(FALSE, FALSE);
      }
#endif
    }
    else
      errmsg = e_invarg;
  }

  /* 'wildmode' */
  else if (varp == &p_wim)
  {
    if (check_opt_wim() == FAIL)
      errmsg = e_invarg;
  }

#ifdef FEAT_CMDL_COMPL
  /* 'wildoptions' */
  else if (varp == &p_wop)
  {
    if (check_opt_strings(p_wop, p_wop_values, TRUE) != OK)
      errmsg = e_invarg;
  }
#endif

#ifdef FEAT_WAK
  /* 'winaltkeys' */
  else if (varp == &p_wak)
  {
    if (*p_wak == NUL || check_opt_strings(p_wak, p_wak_values, FALSE) != OK)
      errmsg = e_invarg;
  }
#endif

  /* 'eventignore' */
  else if (varp == &p_ei)
  {
    if (check_ei() == FAIL)
      errmsg = e_invarg;
  }

  /* 'encoding', 'fileencoding', 'termencoding' and 'makeencoding' */
  else if (varp == &p_enc || gvarp == &p_fenc || varp == &p_tenc || gvarp == &p_menc)
  {
    if (gvarp == &p_fenc)
    {
      if (!curbuf->b_p_ma && opt_flags != OPT_GLOBAL)
        errmsg = e_modifiable;
      else if (vim_strchr(*varp, ',') != NULL)
        /* No comma allowed in 'fileencoding'; catches confusing it
		 * with 'fileencodings'. */
        errmsg = e_invarg;
      else
      {
        /* Add 'fileencoding' to the swap file. */
        ml_setflags(curbuf);
      }
    }
    if (errmsg == NULL)
    {
      /* canonize the value, so that STRCMP() can be used on it */
      if (varp == &p_enc)
      {
        if (STRCMP(p_enc, ENC_DFLT) != 0)
        {
          errmsg = N_("E617: Cannot be changed in Onivim 2.");
        }
      }
    }

    if (errmsg == NULL && varp == &p_tenc)
    {
      /* GTK+ 2 uses only a single encoding, and that is UTF-8. */
      if (STRCMP(p_tenc, "utf-8") != 0)
        errmsg = N_("E617: Cannot be changed in Onivim 2.");
    }

    if (errmsg == NULL)
    {
#ifdef FEAT_KEYMAP
      /* When 'keymap' is used and 'encoding' changes, reload the keymap
	     * (with another encoding). */
      if (varp == &p_enc && *curbuf->b_p_keymap != NUL)
        (void)keymap_init();
#endif

      /* When 'termencoding' is not empty and 'encoding' changes or when
	     * 'termencoding' changes, need to setup for keyboard input and
	     * display output conversion. */
      if (((varp == &p_enc && *p_tenc != NUL) || varp == &p_tenc))
      {
        if (convert_setup(&input_conv, p_tenc, p_enc) == FAIL || convert_setup(&output_conv, p_enc, p_tenc) == FAIL)
        {
          semsg(_("E950: Cannot convert between %s and %s"),
                p_tenc, p_enc);
          errmsg = e_invarg;
        }
      }

#if defined(MSWIN)
      /* $HOME may have characters in active code page. */
      if (varp == &p_enc)
        init_homedir();
#endif
    }
  }

#if defined(FEAT_POSTSCRIPT)
  else if (varp == &p_penc)
  {
    /* Canonize printencoding if VIM standard one */
    p = enc_canonize(p_penc);
    if (p != NULL)
    {
      vim_free(p_penc);
      p_penc = p;
    }
    else
    {
      /* Ensure lower case and '-' for '_' */
      for (s = p_penc; *s != NUL; s++)
      {
        if (*s == '_')
          *s = '-';
        else
          *s = TOLOWER_ASC(*s);
      }
    }
  }
#endif

#ifdef FEAT_KEYMAP
  else if (varp == &curbuf->b_p_keymap)
  {
    if (!valid_filetype(*varp))
      errmsg = e_invarg;
    else
    {
      int secure_save = secure;

      // Reset the secure flag, since the value of 'keymap' has
      // been checked to be safe.
      secure = 0;

      // load or unload key mapping tables
      errmsg = keymap_init();

      secure = secure_save;

      // Since we check the value, there is no need to set P_INSECURE,
      // even when the value comes from a modeline.
      *value_checked = TRUE;
    }

    if (errmsg == NULL)
    {
      if (*curbuf->b_p_keymap != NUL)
      {
        /* Installed a new keymap, switch on using it. */
        curbuf->b_p_iminsert = B_IMODE_LMAP;
        if (curbuf->b_p_imsearch != B_IMODE_USE_INSERT)
          curbuf->b_p_imsearch = B_IMODE_LMAP;
      }
      else
      {
        /* Cleared the keymap, may reset 'iminsert' and 'imsearch'. */
        if (curbuf->b_p_iminsert == B_IMODE_LMAP)
          curbuf->b_p_iminsert = B_IMODE_NONE;
        if (curbuf->b_p_imsearch == B_IMODE_LMAP)
          curbuf->b_p_imsearch = B_IMODE_USE_INSERT;
      }
      if ((opt_flags & OPT_LOCAL) == 0)
      {
        set_iminsert_global();
        set_imsearch_global();
      }
      status_redraw_curbuf();
    }
  }
#endif

  /* 'fileformat' */
  else if (gvarp == &p_ff)
  {
    if (!curbuf->b_p_ma && !(opt_flags & OPT_GLOBAL))
      errmsg = e_modifiable;
    else if (check_opt_strings(*varp, p_ff_values, FALSE) != OK)
      errmsg = e_invarg;
    else
    {
      /* may also change 'textmode' */
      if (get_fileformat(curbuf) == EOL_DOS)
        curbuf->b_p_tx = TRUE;
      else
        curbuf->b_p_tx = FALSE;
      /* update flag in swap file */
      ml_setflags(curbuf);
      /* Redraw needed when switching to/from "mac": a CR in the text
	     * will be displayed differently. */
      if (get_fileformat(curbuf) == EOL_MAC || *oldval == 'm')
        redraw_curbuf_later(NOT_VALID);
    }
  }

  /* 'fileformats' */
  else if (varp == &p_ffs)
  {
    if (check_opt_strings(p_ffs, p_ff_values, TRUE) != OK)
      errmsg = e_invarg;
    else
    {
      /* also change 'textauto' */
      if (*p_ffs == NUL)
        p_ta = FALSE;
      else
        p_ta = TRUE;
    }
  }

  /* 'matchpairs' */
  else if (gvarp == &p_mps)
  {
    if (has_mbyte)
    {
      for (p = *varp; *p != NUL; ++p)
      {
        int x2 = -1;
        int x3 = -1;

        if (*p != NUL)
          p += mb_ptr2len(p);
        if (*p != NUL)
          x2 = *p++;
        if (*p != NUL)
        {
          x3 = mb_ptr2char(p);
          p += mb_ptr2len(p);
        }
        if (x2 != ':' || x3 == -1 || (*p != NUL && *p != ','))
        {
          errmsg = e_invarg;
          break;
        }
        if (*p == NUL)
          break;
      }
    }
    else
    {
      /* Check for "x:y,x:y" */
      for (p = *varp; *p != NUL; p += 4)
      {
        if (p[1] != ':' || p[2] == NUL || (p[3] != NUL && p[3] != ','))
        {
          errmsg = e_invarg;
          break;
        }
        if (p[3] == NUL)
          break;
      }
    }
  }

#ifdef FEAT_COMMENTS
  /* 'comments' */
  else if (gvarp == &p_com)
  {
    for (s = *varp; *s;)
    {
      while (*s && *s != ':')
      {
        if (vim_strchr((char_u *)COM_ALL, *s) == NULL && !VIM_ISDIGIT(*s) && *s != '-')
        {
          errmsg = illegal_char(errbuf, *s);
          break;
        }
        ++s;
      }
      if (*s++ == NUL)
        errmsg = N_("E524: Missing colon");
      else if (*s == ',' || *s == NUL)
        errmsg = N_("E525: Zero length string");
      if (errmsg != NULL)
        break;
      while (*s && *s != ',')
      {
        if (*s == '\\' && s[1] != NUL)
          ++s;
        ++s;
      }
      s = skip_to_option_part(s);
    }
  }
#endif

  /* 'listchars' */
  else if (varp == &p_lcs)
  {
    errmsg = set_chars_option(varp);
  }

  /* 'fillchars' */
  else if (varp == &p_fcs)
  {
    errmsg = set_chars_option(varp);
  }

  /* 'verbosefile' */
  else if (varp == &p_vfile)
  {
    verbose_stop();
    if (*p_vfile != NUL && verbose_open() == FAIL)
      errmsg = e_invarg;
  }

#ifdef FEAT_VIMINFO
  /* 'viminfo' */
  else if (varp == &p_viminfo)
  {
    for (s = p_viminfo; *s;)
    {
      /* Check it's a valid character */
      if (vim_strchr((char_u *)"!\"%'/:<@cfhnrs", *s) == NULL)
      {
        errmsg = illegal_char(errbuf, *s);
        break;
      }
      if (*s == 'n') /* name is always last one */
        break;
      else if (*s == 'r') /* skip until next ',' */
      {
        while (*++s && *s != ',')
          ;
      }
      else if (*s == '%')
      {
        /* optional number */
        while (vim_isdigit(*++s))
          ;
      }
      else if (*s == '!' || *s == 'h' || *s == 'c')
        ++s; /* no extra chars */
      else   /* must have a number */
      {
        while (vim_isdigit(*++s))
          ;

        if (!VIM_ISDIGIT(*(s - 1)))
        {
          if (errbuf != NULL)
          {
            sprintf(errbuf, _("E526: Missing number after <%s>"),
                    transchar_byte(*(s - 1)));
            errmsg = errbuf;
          }
          else
            errmsg = "";
          break;
        }
      }
      if (*s == ',')
        ++s;
      else if (*s)
      {
        if (errbuf != NULL)
          errmsg = N_("E527: Missing comma");
        else
          errmsg = "";
        break;
      }
    }
    if (*p_viminfo && errmsg == NULL && get_viminfo_parameter('\'') < 0)
      errmsg = N_("E528: Must specify a ' value");
  }
#endif /* FEAT_VIMINFO */

  /* terminal options */
  else if (istermoption(&options[opt_idx]) && full_screen)
  {
    /* ":set t_Co=0" and ":set t_Co=1" do ":set t_Co=" */
    if (varp == &T_CCO)
    {
      int colors = atoi((char *)T_CCO);

      /* Only reinitialize colors if t_Co value has really changed to
	     * avoid expensive reload of colorscheme if t_Co is set to the
	     * same value multiple times. */
      if (colors != t_colors)
      {
        t_colors = colors;
        if (t_colors <= 1)
        {
          if (new_value_alloced)
            vim_free(T_CCO);
          T_CCO = empty_option;
        }
        /* We now have a different color setup, initialize it again. */
        init_highlight(TRUE, FALSE);
      }
    }
    ttest(FALSE);
    if (varp == &T_ME)
    {
      out_str(T_ME);
      redraw_later(CLEAR);
#if defined(MSWIN)
      /* Since t_me has been set, this probably means that the user
	     * wants to use this as default colors.  Need to reset default
	     * background/foreground colors. */
      mch_set_normal_colors();
#endif
    }
    if (varp == &T_BE && termcap_active)
    {
      if (*T_BE == NUL)
        /* When clearing t_BE we assume the user no longer wants
		 * bracketed paste, thus disable it by writing t_BD. */
        out_str(T_BD);
      else
        out_str(T_BE);
    }
  }

#ifdef FEAT_LINEBREAK
  /* 'showbreak' */
  else if (varp == &p_sbr)
  {
    for (s = p_sbr; *s;)
    {
      if (ptr2cells(s) != 1)
        errmsg = N_("E595: contains unprintable or wide character");
      MB_PTR_ADV(s);
    }
  }
#endif

#ifdef FEAT_LANGMAP
  /* 'langmap' */
  else if (varp == &p_langmap)
    langmap_set();
#endif

#ifdef FEAT_LINEBREAK
  /* 'breakat' */
  else if (varp == &p_breakat)
    fill_breakat_flags();
#endif

  /* 'selection' */
  else if (varp == &p_sel)
  {
    if (*p_sel == NUL || check_opt_strings(p_sel, p_sel_values, FALSE) != OK)
      errmsg = e_invarg;
  }

  /* 'selectmode' */
  else if (varp == &p_slm)
  {
    if (check_opt_strings(p_slm, p_slm_values, TRUE) != OK)
      errmsg = e_invarg;
  }

#ifdef FEAT_BROWSE
  /* 'browsedir' */
  else if (varp == &p_bsdir)
  {
    if (check_opt_strings(p_bsdir, p_bsdir_values, FALSE) != OK && !mch_isdir(p_bsdir))
      errmsg = e_invarg;
  }
#endif

  /* 'keymodel' */
  else if (varp == &p_km)
  {
    if (check_opt_strings(p_km, p_km_values, TRUE) != OK)
      errmsg = e_invarg;
    else
    {
      km_stopsel = (vim_strchr(p_km, 'o') != NULL);
      km_startsel = (vim_strchr(p_km, 'a') != NULL);
    }
  }

  /* 'mousemodel' */
  else if (varp == &p_mousem)
  {
    if (check_opt_strings(p_mousem, p_mousem_values, FALSE) != OK)
      errmsg = e_invarg;
  }

  /* 'switchbuf' */
  else if (varp == &p_swb)
  {
    if (opt_strings_flags(p_swb, p_swb_values, &swb_flags, TRUE) != OK)
      errmsg = e_invarg;
  }

  /* 'debug' */
  else if (varp == &p_debug)
  {
    if (check_opt_strings(p_debug, p_debug_values, TRUE) != OK)
      errmsg = e_invarg;
  }

  /* 'display' */
  else if (varp == &p_dy)
  {
    if (opt_strings_flags(p_dy, p_dy_values, &dy_flags, TRUE) != OK)
      errmsg = e_invarg;
    else
      (void)init_chartab();
  }

  /* 'eadirection' */
  else if (varp == &p_ead)
  {
    if (check_opt_strings(p_ead, p_ead_values, FALSE) != OK)
      errmsg = e_invarg;
  }

  /* When 'bufhidden' is set, check for valid value. */
  else if (gvarp == &p_bh)
  {
    if (check_opt_strings(curbuf->b_p_bh, p_bufhidden_values, FALSE) != OK)
      errmsg = e_invarg;
  }

  /* When 'buftype' is set, check for valid value. */
  else if (gvarp == &p_bt)
  {
    if (check_opt_strings(curbuf->b_p_bt, p_buftype_values, FALSE) != OK)
      errmsg = e_invarg;
    else
    {
      if (curwin->w_status_height)
      {
        curwin->w_redr_status = TRUE;
        redraw_later(VALID);
      }
      curbuf->b_help = (curbuf->b_p_bt[0] == 'h');
    }
  }

#ifdef FEAT_SIGNS
  /* 'signcolumn' */
  else if (varp == &curwin->w_p_scl)
  {
    if (check_opt_strings(*varp, p_scl_values, FALSE) != OK)
      errmsg = e_invarg;
  }
#endif

#if defined(FEAT_TOOLBAR)
  /* 'toolbar' */
  else if (varp == &p_toolbar)
  {
    if (opt_strings_flags(p_toolbar, p_toolbar_values,
                          &toolbar_flags, TRUE) != OK)
      errmsg = e_invarg;
    else
    {
      gui_mch_show_toolbar((toolbar_flags &
                            (TOOLBAR_TEXT | TOOLBAR_ICONS)) != 0);
    }
  }
#endif

  /* 'pastetoggle': translate key codes like in a mapping */
  else if (varp == &p_pt)
  {
    if (*p_pt)
    {
      (void)replace_termcodes(p_pt, &p, TRUE, TRUE, FALSE);
      if (p != NULL)
      {
        if (new_value_alloced)
          free_string_option(p_pt);
        p_pt = p;
        new_value_alloced = TRUE;
      }
    }
  }

  /* 'backspace' */
  else if (varp == &p_bs)
  {
    if (VIM_ISDIGIT(*p_bs))
    {
      if (*p_bs > '2' || p_bs[1] != NUL)
        errmsg = e_invarg;
    }
    else if (check_opt_strings(p_bs, p_bs_values, TRUE) != OK)
      errmsg = e_invarg;
  }
  else if (varp == &p_bo)
  {
    if (opt_strings_flags(p_bo, p_bo_values, &bo_flags, TRUE) != OK)
      errmsg = e_invarg;
  }

  /* 'tagcase' */
  else if (gvarp == &p_tc)
  {
    unsigned int *flags;

    if (opt_flags & OPT_LOCAL)
    {
      p = curbuf->b_p_tc;
      flags = &curbuf->b_tc_flags;
    }
    else
    {
      p = p_tc;
      flags = &tc_flags;
    }

    if ((opt_flags & OPT_LOCAL) && *p == NUL)
      /* make the local value empty: use the global value */
      *flags = 0;
    else if (*p == NUL || opt_strings_flags(p, p_tc_values, flags, FALSE) != OK)
      errmsg = e_invarg;
  }

  /* 'casemap' */
  else if (varp == &p_cmp)
  {
    if (opt_strings_flags(p_cmp, p_cmp_values, &cmp_flags, TRUE) != OK)
      errmsg = e_invarg;
  }

#ifdef FEAT_DIFF
  /* 'diffopt' */
  else if (varp == &p_dip)
  {
    if (diffopt_changed() == FAIL)
      errmsg = e_invarg;
  }
#endif

#ifdef FEAT_FOLDING
  /* 'foldmethod' */
  else if (gvarp == &curwin->w_allbuf_opt.wo_fdm)
  {
    if (check_opt_strings(*varp, p_fdm_values, FALSE) != OK || *curwin->w_p_fdm == NUL)
      errmsg = e_invarg;
    else
    {
      foldUpdateAll(curwin);
      if (foldmethodIsDiff(curwin))
        newFoldLevel();
    }
  }
#ifdef FEAT_EVAL
  /* 'foldexpr' */
  else if (varp == &curwin->w_p_fde)
  {
    if (foldmethodIsExpr(curwin))
      foldUpdateAll(curwin);
  }
#endif
  /* 'foldmarker' */
  else if (gvarp == &curwin->w_allbuf_opt.wo_fmr)
  {
    p = vim_strchr(*varp, ',');
    if (p == NULL)
      errmsg = N_("E536: comma required");
    else if (p == *varp || p[1] == NUL)
      errmsg = e_invarg;
    else if (foldmethodIsMarker(curwin))
      foldUpdateAll(curwin);
  }
  /* 'commentstring' */
  else if (gvarp == &p_cms)
  {
    if (**varp != NUL && strstr((char *)*varp, "%s") == NULL)
      errmsg = N_("E537: 'commentstring' must be empty or contain %s");
  }
  /* 'foldopen' */
  else if (varp == &p_fdo)
  {
    if (opt_strings_flags(p_fdo, p_fdo_values, &fdo_flags, TRUE) != OK)
      errmsg = e_invarg;
  }
  /* 'foldclose' */
  else if (varp == &p_fcl)
  {
    if (check_opt_strings(p_fcl, p_fcl_values, TRUE) != OK)
      errmsg = e_invarg;
  }
  /* 'foldignore' */
  else if (gvarp == &curwin->w_allbuf_opt.wo_fdi)
  {
    if (foldmethodIsIndent(curwin))
      foldUpdateAll(curwin);
  }
#endif

  /* 'virtualedit' */
  else if (varp == &p_ve)
  {
    if (opt_strings_flags(p_ve, p_ve_values, &ve_flags, TRUE) != OK)
      errmsg = e_invarg;
    else if (STRCMP(p_ve, oldval) != 0)
    {
      /* Recompute cursor position in case the new 've' setting
	     * changes something. */
      validate_virtcol();
      coladvance(curwin->w_virtcol);
    }
  }

#if defined(FEAT_RENDER_OPTIONS)
  /* 'renderoptions' */
  else if (varp == &p_rop)
  {
    if (!gui_mch_set_rendering_options(p_rop))
      errmsg = e_invarg;
  }
#endif

  else if (gvarp == &p_ft)
  {
    if (!valid_filetype(*varp))
      errmsg = e_invarg;
    else
    {
      value_changed = STRCMP(oldval, *varp) != 0;

      // Since we check the value, there is no need to set P_INSECURE,
      // even when the value comes from a modeline.
      *value_checked = TRUE;
    }
  }

#ifdef FEAT_TERMINAL
  // 'termwinkey'
  else if (varp == &curwin->w_p_twk)
  {
    if (*curwin->w_p_twk != NUL && string_to_key(curwin->w_p_twk, TRUE) == 0)
      errmsg = e_invarg;
  }
  // 'termwinsize'
  else if (varp == &curwin->w_p_tws)
  {
    if (*curwin->w_p_tws != NUL)
    {
      p = skipdigits(curwin->w_p_tws);
      if (p == curwin->w_p_tws || (*p != 'x' && *p != '*') || *skipdigits(p + 1) != NUL)
        errmsg = e_invarg;
    }
  }
#if defined(MSWIN)
  // 'termwintype'
  else if (varp == &p_twt)
  {
    if (check_opt_strings(*varp, p_twt_values, FALSE) != OK)
      errmsg = e_invarg;
  }
#endif
#endif

#ifdef FEAT_VARTABS
  /* 'varsofttabstop' */
  else if (varp == &(curbuf->b_p_vsts))
  {
    char_u *cp;

    if (!(*varp)[0] || ((*varp)[0] == '0' && !(*varp)[1]))
    {
      if (curbuf->b_p_vsts_array)
      {
        vim_free(curbuf->b_p_vsts_array);
        curbuf->b_p_vsts_array = 0;
      }
    }
    else
    {
      for (cp = *varp; *cp; ++cp)
      {
        if (vim_isdigit(*cp))
          continue;
        if (*cp == ',' && cp > *varp && *(cp - 1) != ',')
          continue;
        errmsg = e_invarg;
        break;
      }
      if (errmsg == NULL)
      {
        int *oldarray = curbuf->b_p_vsts_array;
        if (tabstop_set(*varp, &(curbuf->b_p_vsts_array)))
        {
          if (oldarray)
            vim_free(oldarray);
        }
        else
          errmsg = e_invarg;
      }
    }
  }

  /* 'vartabstop' */
  else if (varp == &(curbuf->b_p_vts))
  {
    char_u *cp;

    if (!(*varp)[0] || ((*varp)[0] == '0' && !(*varp)[1]))
    {
      if (curbuf->b_p_vts_array)
      {
        vim_free(curbuf->b_p_vts_array);
        curbuf->b_p_vts_array = NULL;
      }
    }
    else
    {
      for (cp = *varp; *cp; ++cp)
      {
        if (vim_isdigit(*cp))
          continue;
        if (*cp == ',' && cp > *varp && *(cp - 1) != ',')
          continue;
        errmsg = e_invarg;
        break;
      }
      if (errmsg == NULL)
      {
        int *oldarray = curbuf->b_p_vts_array;

        if (tabstop_set(*varp, &(curbuf->b_p_vts_array)))
        {
          vim_free(oldarray);
#ifdef FEAT_FOLDING
          if (foldmethodIsIndent(curwin))
            foldUpdateAll(curwin);
#endif
        }
        else
          errmsg = e_invarg;
      }
    }
  }
#endif

  /* Options that are a list of flags. */
  else
  {
    p = NULL;
    if (varp == &p_ww) /* 'whichwrap' */
      p = (char_u *)WW_ALL;
    if (varp == &p_shm) /* 'shortmess' */
      p = (char_u *)SHM_ALL;
    else if (varp == &(p_cpo)) /* 'cpoptions' */
      p = (char_u *)CPO_ALL;
    else if (varp == &(curbuf->b_p_fo)) /* 'formatoptions' */
      p = (char_u *)FO_ALL;
    else if (varp == &p_mouse) /* 'mouse' */
    {
      if (*p_mouse != NUL)
        errmsg = N_("E538: No mouse support");
    }
    if (p != NULL)
    {
      for (s = *varp; *s; ++s)
        if (vim_strchr(p, *s) == NULL)
        {
          errmsg = illegal_char(errbuf, *s);
          break;
        }
    }
  }

  /*
     * If error detected, restore the previous value.
     */
  if (errmsg != NULL)
  {
    if (new_value_alloced)
      free_string_option(*varp);
    *varp = oldval;
    /*
	 * When resetting some values, need to act on it.
	 */
    if (did_chartab)
      (void)init_chartab();
    if (varp == &p_hl)
      (void)highlight_changed();
  }
  else
  {
#ifdef FEAT_EVAL
    /* Remember where the option was set. */
    set_option_sctx_idx(opt_idx, opt_flags, current_sctx);
#endif
    /*
	 * Free string options that are in allocated memory.
	 * Use "free_oldval", because recursiveness may change the flags under
	 * our fingers (esp. init_highlight()).
	 */
    if (free_oldval)
      free_string_option(oldval);
    if (new_value_alloced)
      options[opt_idx].flags |= P_ALLOCED;
    else
      options[opt_idx].flags &= ~P_ALLOCED;

    if ((opt_flags & (OPT_LOCAL | OPT_GLOBAL)) == 0 && ((int)options[opt_idx].indir & PV_BOTH))
    {
      /* global option with local value set to use global value; free
	     * the local value and make it empty */
      p = get_varp_scope(&(options[opt_idx]), OPT_LOCAL);
      free_string_option(*(char_u **)p);
      *(char_u **)p = empty_option;
    }

    /* May set global value for local option. */
    else if (!(opt_flags & OPT_LOCAL) && opt_flags != OPT_GLOBAL)
      set_string_option_global(opt_idx, varp);

    /*
	 * Trigger the autocommand only after setting the flags.
	 */
    else if (varp == &(curbuf->b_p_ft))
    {
      /* 'filetype' is set, trigger the FileType autocommand.
	     * Skip this when called from a modeline and the filetype was
	     * already set to this value. */
      if (!(opt_flags & OPT_MODELINE) || value_changed)
      {
        static int ft_recursive = 0;
        int secure_save = secure;

        // Reset the secure flag, since the value of 'filetype' has
        // been checked to be safe.
        secure = 0;

        ++ft_recursive;
        did_filetype = TRUE;
        // Only pass TRUE for "force" when the value changed or not
        // used recursively, to avoid endless recurrence.
        apply_autocmds(EVENT_FILETYPE, curbuf->b_p_ft, curbuf->b_fname,
                       value_changed || ft_recursive == 1, curbuf);
        --ft_recursive;
        /* Just in case the old "curbuf" is now invalid. */
        if (varp != &(curbuf->b_p_ft))
          varp = NULL;

        secure = secure_save;
      }
    }
  }

  if (curwin->w_curswant != MAXCOL && (options[opt_idx].flags & (P_CURSWANT | P_RALL)) != 0)
    curwin->w_set_curswant = TRUE;

  check_redraw(options[opt_idx].flags);

  return errmsg;
}

/*
 * Handle setting 'listchars' or 'fillchars'.
 * Returns error message, NULL if it's OK.
 */
static char *
set_chars_option(char_u **varp)
{
  int round, i, len, entries;
  char_u *p, *s;
  int c1 = 0, c2 = 0, c3 = 0;
  struct charstab
  {
    int *cp;
    char *name;
  };
  static struct charstab filltab[] =
      {
          {&fill_stl, "stl"},
          {&fill_stlnc, "stlnc"},
          {&fill_vert, "vert"},
          {&fill_fold, "fold"},
          {&fill_diff, "diff"},
      };
  static struct charstab lcstab[] =
      {
          {&lcs_eol, "eol"},
          {&lcs_ext, "extends"},
          {&lcs_nbsp, "nbsp"},
          {&lcs_prec, "precedes"},
          {&lcs_space, "space"},
          {&lcs_tab2, "tab"},
          {&lcs_trail, "trail"},
          {NULL, "conceal"},
      };
  struct charstab *tab;

  if (varp == &p_lcs)
  {
    tab = lcstab;
    entries = sizeof(lcstab) / sizeof(struct charstab);
  }
  else
  {
    tab = filltab;
    entries = sizeof(filltab) / sizeof(struct charstab);
  }

  /* first round: check for valid value, second round: assign values */
  for (round = 0; round <= 1; ++round)
  {
    if (round > 0)
    {
      /* After checking that the value is valid: set defaults: space for
	     * 'fillchars', NUL for 'listchars' */
      for (i = 0; i < entries; ++i)
        if (tab[i].cp != NULL)
          *(tab[i].cp) = (varp == &p_lcs ? NUL : ' ');

      if (varp == &p_lcs)
      {
        lcs_tab1 = NUL;
        lcs_tab3 = NUL;
      }
      else
        fill_diff = '-';
    }
    p = *varp;
    while (*p)
    {
      for (i = 0; i < entries; ++i)
      {
        len = (int)STRLEN(tab[i].name);
        if (STRNCMP(p, tab[i].name, len) == 0 && p[len] == ':' && p[len + 1] != NUL)
        {
          c2 = c3 = 0;
          s = p + len + 1;
          c1 = mb_ptr2char_adv(&s);
          if (mb_char2cells(c1) > 1)
            continue;
          if (tab[i].cp == &lcs_tab2)
          {
            if (*s == NUL)
              continue;
            c2 = mb_ptr2char_adv(&s);
            if (mb_char2cells(c2) > 1)
              continue;
            if (!(*s == ',' || *s == NUL))
            {
              c3 = mb_ptr2char_adv(&s);
              if (mb_char2cells(c3) > 1)
                continue;
            }
          }

          if (*s == ',' || *s == NUL)
          {
            if (round)
            {
              if (tab[i].cp == &lcs_tab2)
              {
                lcs_tab1 = c1;
                lcs_tab2 = c2;
                lcs_tab3 = c3;
              }
              else if (tab[i].cp != NULL)
                *(tab[i].cp) = c1;
            }
            p = s;
            break;
          }
        }
      }

      if (i == entries)
        return e_invarg;
      if (*p == ',')
        ++p;
    }
  }

  return NULL; /* no error */
}

#if defined(FEAT_EVAL) || defined(PROTO)
/*
 * Set the script_ctx for an option, taking care of setting the buffer- or
 * window-local value.
 */
static void
set_option_sctx_idx(int opt_idx, int opt_flags, sctx_T script_ctx)
{
  int both = (opt_flags & (OPT_LOCAL | OPT_GLOBAL)) == 0;
  int indir = (int)options[opt_idx].indir;
  sctx_T new_script_ctx = script_ctx;

  new_script_ctx.sc_lnum += sourcing_lnum;

  /* Remember where the option was set.  For local options need to do that
     * in the buffer or window structure. */
  if (both || (opt_flags & OPT_GLOBAL) || (indir & (PV_BUF | PV_WIN)) == 0)
    options[opt_idx].script_ctx = new_script_ctx;
  if (both || (opt_flags & OPT_LOCAL))
  {
    if (indir & PV_BUF)
      curbuf->b_p_script_ctx[indir & PV_MASK] = new_script_ctx;
    else if (indir & PV_WIN)
      curwin->w_p_script_ctx[indir & PV_MASK] = new_script_ctx;
  }
}

/*
 * Set the script_ctx for a termcap option.
 * "name" must be the two character code, e.g. "RV".
 * When "name" is NULL use "opt_idx".
 */
void set_term_option_sctx_idx(char *name, int opt_idx)
{
  char_u buf[5];
  int idx;

  if (name == NULL)
    idx = opt_idx;
  else
  {
    buf[0] = 't';
    buf[1] = '_';
    buf[2] = name[0];
    buf[3] = name[1];
    buf[4] = 0;
    idx = findoption(buf);
  }
  if (idx >= 0)
    set_option_sctx_idx(idx, OPT_GLOBAL, current_sctx);
}
#endif

/*
 * Set the value of a boolean option, and take care of side effects.
 * Returns NULL for success, or an error message for an error.
 */
static char *
set_bool_option(
    int opt_idx,   /* index in options[] table */
    char_u *varp,  /* pointer to the option variable */
    int value,     /* new value */
    int opt_flags) /* OPT_LOCAL and/or OPT_GLOBAL */
{
  int old_value = *(int *)varp;

  /* Disallow changing some options from secure mode */
  if ((secure
#ifdef HAVE_SANDBOX
       || sandbox != 0
#endif
       ) &&
      (options[opt_idx].flags & P_SECURE))
    return e_secure;

  *(int *)varp = value; /* set the new value */
#ifdef FEAT_EVAL
  /* Remember where the option was set. */
  set_option_sctx_idx(opt_idx, opt_flags, current_sctx);
#endif

  /* May set global value for local option. */
  if ((opt_flags & (OPT_LOCAL | OPT_GLOBAL)) == 0)
    *(int *)get_varp_scope(&(options[opt_idx]), OPT_GLOBAL) = value;

  /*
     * Handle side effects of changing a bool option.
     */

  /* 'compatible' */
  if ((int *)varp == &p_cp)
    compatible_set();

#ifdef FEAT_LANGMAP
  if ((int *)varp == &p_lrm)
    /* 'langremap' -> !'langnoremap' */
    p_lnr = !p_lrm;
  else if ((int *)varp == &p_lnr)
    /* 'langnoremap' -> !'langremap' */
    p_lrm = !p_lnr;
#endif

#ifdef FEAT_PERSISTENT_UNDO
  /* 'undofile' */
  else if ((int *)varp == &curbuf->b_p_udf || (int *)varp == &p_udf)
  {
    /* Only take action when the option was set. When reset we do not
	 * delete the undo file, the option may be set again without making
	 * any changes in between. */
    if (curbuf->b_p_udf || p_udf)
    {
      char_u hash[UNDO_HASH_SIZE];
      buf_T *save_curbuf = curbuf;

      FOR_ALL_BUFFERS(curbuf)
      {
        /* When 'undofile' is set globally: for every buffer, otherwise
		 * only for the current buffer: Try to read in the undofile,
		 * if one exists, the buffer wasn't changed and the buffer was
		 * loaded */
        if ((curbuf == save_curbuf || (opt_flags & OPT_GLOBAL) || opt_flags == 0) && !curbufIsChanged() && curbuf->b_ml.ml_mfp != NULL)
        {
          u_compute_hash(hash);
          u_read_undo(NULL, hash, curbuf->b_fname);
        }
      }
      curbuf = save_curbuf;
    }
  }
#endif

  else if ((int *)varp == &curbuf->b_p_ro)
  {
    /* when 'readonly' is reset globally, also reset readonlymode */
    if (!curbuf->b_p_ro && (opt_flags & OPT_LOCAL) == 0)
      readonlymode = FALSE;

    /* when 'readonly' is set may give W10 again */
    if (curbuf->b_p_ro)
      curbuf->b_did_warn = FALSE;
  }

  /* when 'modifiable' is changed, redraw the window title */
  else if ((int *)varp == &curbuf->b_p_ma)
  {
#ifdef FEAT_TERMINAL
    /* Cannot set 'modifiable' when in Terminal mode. */
    if (curbuf->b_p_ma && (term_in_normal_mode() || (bt_terminal(curbuf) && curbuf->b_term != NULL && !term_is_finished(curbuf))))
    {
      curbuf->b_p_ma = FALSE;
      return N_("E946: Cannot make a terminal with running job modifiable");
    }
#endif
  }

  /* when 'bin' is set also set some other options */
  else if ((int *)varp == &curbuf->b_p_bin)
  {
    set_options_bin(old_value, curbuf->b_p_bin, opt_flags);
  }

  /* when 'buflisted' changes, trigger autocommands */
  else if ((int *)varp == &curbuf->b_p_bl && old_value != curbuf->b_p_bl)
  {
    apply_autocmds(curbuf->b_p_bl ? EVENT_BUFADD : EVENT_BUFDELETE,
                   NULL, NULL, TRUE, curbuf);
  }

  /* when 'swf' is set, create swapfile, when reset remove swapfile */
  else if ((int *)varp == &curbuf->b_p_swf)
  {
    if (curbuf->b_p_swf && p_uc)
      ml_open_file(curbuf); /* create the swap file */
    else
      /* no need to reset curbuf->b_may_swap, ml_open_file() will check
	     * buf->b_p_swf */
      mf_close_file(curbuf, TRUE); /* remove the swap file */
  }

  /* when 'terse' is set change 'shortmess' */
  else if ((int *)varp == &p_terse)
  {
    char_u *p;

    p = vim_strchr(p_shm, SHM_SEARCH);

    /* insert 's' in p_shm */
    if (p_terse && p == NULL)
    {
      STRCPY(IObuff, p_shm);
      STRCAT(IObuff, "s");
      set_string_option_direct((char_u *)"shm", -1, IObuff, OPT_FREE, 0);
    }
    /* remove 's' from p_shm */
    else if (!p_terse && p != NULL)
      STRMOVE(p, p + 1);
  }

  /* when 'paste' is set or reset also change other options */
  else if ((int *)varp == &p_paste)
  {
    paste_option_changed();
  }

  /* when 'insertmode' is set from an autocommand need to do work here */
  else if ((int *)varp == &p_im)
  {
    if (p_im)
    {
      if ((State & INSERT) == 0)
        need_start_insertmode = TRUE;
      stop_insert_mode = FALSE;
    }
    /* only reset if it was set previously */
    else if (old_value)
    {
      need_start_insertmode = FALSE;
      stop_insert_mode = TRUE;
      if (restart_edit != 0 && mode_displayed)
        clear_cmdline = TRUE; /* remove "(insert)" */
      restart_edit = 0;
    }
  }

  /* when 'ignorecase' is set or reset and 'hlsearch' is set, redraw */
  else if ((int *)varp == &p_ic && p_hls)
  {
    redraw_all_later(SOME_VALID);
  }

#ifdef FEAT_SEARCH_EXTRA
  /* when 'hlsearch' is set or reset: reset no_hlsearch */
  else if ((int *)varp == &p_hls)
  {
    set_no_hlsearch(FALSE);
  }
#endif

  /* when 'scrollbind' is set: snapshot the current position to avoid a jump
     * at the end of normal_cmd() */
  else if ((int *)varp == &curwin->w_p_scb)
  {
    if (curwin->w_p_scb)
    {
      do_check_scrollbind(FALSE);
      curwin->w_scbind_pos = curwin->w_topline;
    }
  }

#if defined(FEAT_QUICKFIX)
  /* There can be only one window with 'previewwindow' set. */
  else if ((int *)varp == &curwin->w_p_pvw)
  {
    if (curwin->w_p_pvw)
    {
      win_T *win;

      FOR_ALL_WINDOWS(win)
      if (win->w_p_pvw && win != curwin)
      {
        curwin->w_p_pvw = FALSE;
        return N_("E590: A preview window already exists");
      }
    }
  }
#endif

  /* when 'textmode' is set or reset also change 'fileformat' */
  else if ((int *)varp == &curbuf->b_p_tx)
  {
    set_fileformat(curbuf->b_p_tx ? EOL_DOS : EOL_UNIX, opt_flags);
  }

  /* when 'textauto' is set or reset also change 'fileformats' */
  else if ((int *)varp == &p_ta)
  {
    set_string_option_direct((char_u *)"ffs", -1,
                             p_ta ? (char_u *)DFLT_FFS_VIM : (char_u *)"",
                             OPT_FREE | opt_flags, 0);
  }

  else if ((int *)varp == &curbuf->b_changed)
  {
    if (!value)
      save_file_ff(curbuf); /* Buffer is unchanged */
    modified_was_set = value;
  }

#ifdef BACKSLASH_IN_FILENAME
  else if ((int *)varp == &p_ssl)
  {
    if (p_ssl)
    {
      psepc = '/';
      psepcN = '\\';
      pseps[0] = '/';
    }
    else
    {
      psepc = '\\';
      psepcN = '/';
      pseps[0] = '\\';
    }

    /* need to adjust the file name arguments and buffer names. */
    buflist_slash_adjust();
    alist_slash_adjust();
#ifdef FEAT_EVAL
    scriptnames_slash_adjust();
#endif
  }
#endif

  /* If 'wrap' is set, set w_leftcol to zero. */
  else if ((int *)varp == &curwin->w_p_wrap)
  {
    if (curwin->w_p_wrap)
      curwin->w_leftcol = 0;
  }

  else if ((int *)varp == &p_ea)
  {
    if (p_ea && !old_value)
      win_equal(curwin, FALSE, 0);
  }

  else if ((int *)varp == &p_wiv)
  {
    /*
	 * When 'weirdinvert' changed, set/reset 't_xs'.
	 * Then set 'weirdinvert' according to value of 't_xs'.
	 */
    if (p_wiv && !old_value)
      T_XS = (char_u *)"y";
    else if (!p_wiv && old_value)
      T_XS = empty_option;
    p_wiv = (*T_XS != NUL);
  }

#ifdef FEAT_BEVAL_GUI
  else if ((int *)varp == &p_beval)
  {
    if (!balloonEvalForTerm)
    {
      if (p_beval && !old_value)
        gui_mch_enable_beval_area(balloonEval);
      else if (!p_beval && old_value)
        gui_mch_disable_beval_area(balloonEval);
    }
  }
#endif
#ifdef FEAT_BEVAL_TERM
  else if ((int *)varp == &p_bevalterm)
  {
    mch_bevalterm_changed();
  }
#endif

#ifdef FEAT_AUTOCHDIR
  else if ((int *)varp == &p_acd)
  {
    /* Change directories when the 'acd' option is set now. */
    DO_AUTOCHDIR;
  }
#endif

#ifdef FEAT_DIFF
  /* 'diff' */
  else if ((int *)varp == &curwin->w_p_diff)
  {
    /* May add or remove the buffer from the list of diff buffers. */
    diff_buf_adjust(curwin);
#ifdef FEAT_FOLDING
    if (foldmethodIsDiff(curwin))
      foldUpdateAll(curwin);
#endif
  }
#endif

#ifdef FEAT_ARABIC
  if ((int *)varp == &curwin->w_p_arab)
  {
    if (curwin->w_p_arab)
    {
      /*
	     * 'arabic' is set, handle various sub-settings.
	     */
      if (!p_tbidi)
      {
        /* set rightleft mode */
        if (!curwin->w_p_rl)
        {
          curwin->w_p_rl = TRUE;
          changed_window_setting();
        }

        /* Enable Arabic shaping (major part of what Arabic requires) */
        if (!p_arshape)
        {
          p_arshape = TRUE;
          redraw_later_clear();
        }
      }

      /* Arabic requires a utf-8 encoding, inform the user if its not
	     * set. */
      if (STRCMP(p_enc, "utf-8") != 0)
      {
        static char *w_arabic = N_("W17: Arabic requires UTF-8, do ':set encoding=utf-8'");

        msg_source(HL_ATTR(HLF_W));
        msg_attr(_(w_arabic), HL_ATTR(HLF_W));
#ifdef FEAT_EVAL
        set_vim_var_string(VV_WARNINGMSG, (char_u *)_(w_arabic), -1);
#endif
      }

      /* set 'delcombine' */
      p_deco = TRUE;

#ifdef FEAT_KEYMAP
      /* Force-set the necessary keymap for arabic */
      set_option_value((char_u *)"keymap", 0L, (char_u *)"arabic",
                       OPT_LOCAL);
#endif
    }
    else
    {
      /*
	     * 'arabic' is reset, handle various sub-settings.
	     */
      if (!p_tbidi)
      {
        /* reset rightleft mode */
        if (curwin->w_p_rl)
        {
          curwin->w_p_rl = FALSE;
          changed_window_setting();
        }

        /* 'arabicshape' isn't reset, it is a global option and
		 * another window may still need it "on". */
      }

      /* 'delcombine' isn't reset, it is a global option and another
	     * window may still want it "on". */

#ifdef FEAT_KEYMAP
      /* Revert to the default keymap */
      curbuf->b_p_iminsert = B_IMODE_NONE;
      curbuf->b_p_imsearch = B_IMODE_USE_INSERT;
#endif
    }
  }

#endif

  /*
     * End of handling side effects for bool options.
     */

  /* after handling side effects, call autocommand */

  options[opt_idx].flags |= P_WAS_SET;

#if defined(FEAT_EVAL)
  // Don't do this while starting up or recursively.
  if (!starting && *get_vim_var_str(VV_OPTION_TYPE) == NUL)
  {
    char_u buf_old[2], buf_new[2], buf_type[7];

    vim_snprintf((char *)buf_old, 2, "%d", old_value ? TRUE : FALSE);
    vim_snprintf((char *)buf_new, 2, "%d", value ? TRUE : FALSE);
    vim_snprintf((char *)buf_type, 7, "%s", (opt_flags & OPT_LOCAL) ? "local" : "global");
    set_vim_var_string(VV_OPTION_NEW, buf_new, -1);
    set_vim_var_string(VV_OPTION_OLD, buf_old, -1);
    set_vim_var_string(VV_OPTION_TYPE, buf_type, -1);
    apply_autocmds(EVENT_OPTIONSET, (char_u *)options[opt_idx].fullname, NULL, FALSE, NULL);
    reset_v_option_vars();
  }
#endif

  comp_col(); /* in case 'ruler' or 'showcmd' changed */
  if (curwin->w_curswant != MAXCOL && (options[opt_idx].flags & (P_CURSWANT | P_RALL)) != 0)
    curwin->w_set_curswant = TRUE;
  check_redraw(options[opt_idx].flags);

  return NULL;
}

/*
 * Set the value of a number option, and take care of side effects.
 * Returns NULL for success, or an error message for an error.
 */
static char *
set_num_option(
    int opt_idx,      /* index in options[] table */
    char_u *varp,     /* pointer to the option variable */
    long value,       /* new value */
    char *errbuf,     /* buffer for error messages */
    size_t errbuflen, /* length of "errbuf" */
    int opt_flags)    /* OPT_LOCAL, OPT_GLOBAL and
					   OPT_MODELINE */
{
  char *errmsg = NULL;
  long old_value = *(long *)varp;
  long old_Rows = Rows;       /* remember old Rows */
  long old_Columns = Columns; /* remember old Columns */
  long *pp = (long *)varp;

  /* Disallow changing some options from secure mode. */
  if ((secure
#ifdef HAVE_SANDBOX
       || sandbox != 0
#endif
       ) &&
      (options[opt_idx].flags & P_SECURE))
    return e_secure;

  *pp = value;
#ifdef FEAT_EVAL
  /* Remember where the option was set. */
  set_option_sctx_idx(opt_idx, opt_flags, current_sctx);
#endif

  if (curbuf->b_p_sw < 0)
  {
    errmsg = e_positive;
#ifdef FEAT_VARTABS
    // Use the first 'vartabstop' value, or 'tabstop' if vts isn't in use.
    curbuf->b_p_sw = tabstop_count(curbuf->b_p_vts_array) > 0
                         ? tabstop_first(curbuf->b_p_vts_array)
                         : curbuf->b_p_ts;
#else
    curbuf->b_p_sw = curbuf->b_p_ts;
#endif
  }

  /*
     * Number options that need some action when changed
     */
  if (pp == &p_wh || pp == &p_hh)
  {
    // 'winheight' and 'helpheight'
    if (p_wh < 1)
    {
      errmsg = e_positive;
      p_wh = 1;
    }
    if (p_wmh > p_wh)
    {
      errmsg = e_winheight;
      p_wh = p_wmh;
    }
    if (p_hh < 0)
    {
      errmsg = e_positive;
      p_hh = 0;
    }

    /* Change window height NOW */
    if (!ONE_WINDOW)
    {
      if (pp == &p_wh && curwin->w_height < p_wh)
        win_setheight((int)p_wh);
      if (pp == &p_hh && curbuf->b_help && curwin->w_height < p_hh)
        win_setheight((int)p_hh);
    }
  }
  else if (pp == &p_wmh)
  {
    // 'winminheight'
    if (p_wmh < 0)
    {
      errmsg = e_positive;
      p_wmh = 0;
    }
    if (p_wmh > p_wh)
    {
      errmsg = e_winheight;
      p_wmh = p_wh;
    }
    win_setminheight();
  }
  else if (pp == &p_wiw)
  {
    // 'winwidth'
    if (p_wiw < 1)
    {
      errmsg = e_positive;
      p_wiw = 1;
    }
    if (p_wmw > p_wiw)
    {
      errmsg = e_winwidth;
      p_wiw = p_wmw;
    }

    /* Change window width NOW */
    if (!ONE_WINDOW && curwin->w_width < p_wiw)
      win_setwidth((int)p_wiw);
  }
  else if (pp == &p_wmw)
  {
    // 'winminwidth'
    if (p_wmw < 0)
    {
      errmsg = e_positive;
      p_wmw = 0;
    }
    if (p_wmw > p_wiw)
    {
      errmsg = e_winwidth;
      p_wmw = p_wiw;
    }
    win_setminwidth();
  }

  /* (re)set last window status line */
  else if (pp == &p_ls)
  {
    last_status(FALSE);
  }

  /* (re)set tab page line */
  else if (pp == &p_stal)
  {
    shell_new_rows(); /* recompute window positions and heights */
  }

#ifdef FEAT_FOLDING
  /* 'foldlevel' */
  else if (pp == &curwin->w_p_fdl)
  {
    if (curwin->w_p_fdl < 0)
      curwin->w_p_fdl = 0;
    newFoldLevel();
  }

  /* 'foldminlines' */
  else if (pp == &curwin->w_p_fml)
  {
    foldUpdateAll(curwin);
  }

  /* 'foldnestmax' */
  else if (pp == &curwin->w_p_fdn)
  {
    if (foldmethodIsSyntax(curwin) || foldmethodIsIndent(curwin))
      foldUpdateAll(curwin);
  }

  /* 'foldcolumn' */
  else if (pp == &curwin->w_p_fdc)
  {
    if (curwin->w_p_fdc < 0)
    {
      errmsg = e_positive;
      curwin->w_p_fdc = 0;
    }
    else if (curwin->w_p_fdc > 12)
    {
      errmsg = e_invarg;
      curwin->w_p_fdc = 12;
    }
  }
#endif /* FEAT_FOLDING */

#if defined(FEAT_FOLDING)
  /* 'shiftwidth' or 'tabstop' */
  else if (pp == &curbuf->b_p_sw || pp == &curbuf->b_p_ts)
  {
#ifdef FEAT_FOLDING
    if (foldmethodIsIndent(curwin))
      foldUpdateAll(curwin);
#endif
  }
#endif

  /* 'maxcombine' */
  else if (pp == &p_mco)
  {
    if (p_mco > MAX_MCO)
      p_mco = MAX_MCO;
    else if (p_mco < 0)
      p_mco = 0;
    screenclear(); /* will re-allocate the screen */
  }

  else if (pp == &curbuf->b_p_iminsert)
  {
    if (curbuf->b_p_iminsert < 0 || curbuf->b_p_iminsert > B_IMODE_LAST)
    {
      errmsg = e_invarg;
      curbuf->b_p_iminsert = B_IMODE_NONE;
    }
    p_iminsert = curbuf->b_p_iminsert;
#if defined(FEAT_KEYMAP)
    /* Show/unshow value of 'keymap' in status lines. */
    status_redraw_curbuf();
#endif
  }

  else if (pp == &p_window)
  {
    if (p_window < 1)
      p_window = 1;
    else if (p_window >= Rows)
      p_window = Rows - 1;
  }

  else if (pp == &curbuf->b_p_imsearch)
  {
    if (curbuf->b_p_imsearch < -1 || curbuf->b_p_imsearch > B_IMODE_LAST)
    {
      errmsg = e_invarg;
      curbuf->b_p_imsearch = B_IMODE_NONE;
    }
    p_imsearch = curbuf->b_p_imsearch;
  }

  /* if p_ch changed value, change the command line height */
  else if (pp == &p_ch)
  {
    if (p_ch < 1)
    {
      errmsg = e_positive;
      p_ch = 1;
    }
    if (p_ch > Rows - min_rows() + 1)
      p_ch = Rows - min_rows() + 1;

    /* Only compute the new window layout when startup has been
	 * completed. Otherwise the frame sizes may be wrong. */
    if (p_ch != old_value && full_screen)
      command_height();
  }

  /* when 'updatecount' changes from zero to non-zero, open swap files */
  else if (pp == &p_uc)
  {
    if (p_uc < 0)
    {
      errmsg = e_positive;
      p_uc = 100;
    }
    if (p_uc && !old_value)
      ml_open_files();
  }
#ifdef MZSCHEME_GUI_THREADS
  else if (pp == &p_mzq)
    mzvim_reset_timer();
#endif

#if defined(FEAT_PYTHON) || defined(FEAT_PYTHON3)
  /* 'pyxversion' */
  else if (pp == &p_pyx)
  {
    if (p_pyx != 0 && p_pyx != 2 && p_pyx != 3)
      errmsg = e_invarg;
  }
#endif

  /* sync undo before 'undolevels' changes */
  else if (pp == &p_ul)
  {
    /* use the old value, otherwise u_sync() may not work properly */
    p_ul = old_value;
    u_sync(TRUE);
    p_ul = value;
  }
  else if (pp == &curbuf->b_p_ul)
  {
    /* use the old value, otherwise u_sync() may not work properly */
    curbuf->b_p_ul = old_value;
    u_sync(TRUE);
    curbuf->b_p_ul = value;
  }

#ifdef FEAT_LINEBREAK
  /* 'numberwidth' must be positive */
  else if (pp == &curwin->w_p_nuw)
  {
    if (curwin->w_p_nuw < 1)
    {
      errmsg = e_positive;
      curwin->w_p_nuw = 1;
    }
    if (curwin->w_p_nuw > 10)
    {
      errmsg = e_invarg;
      curwin->w_p_nuw = 10;
    }
    curwin->w_nrwidth_line_count = 0; /* trigger a redraw */
  }
#endif

  else if (pp == &curbuf->b_p_tw)
  {
    if (curbuf->b_p_tw < 0)
    {
      errmsg = e_positive;
      curbuf->b_p_tw = 0;
    }
  }

  /*
     * Check the bounds for numeric options here
     */
  if (Rows < min_rows() && full_screen)
  {
    if (errbuf != NULL)
    {
      vim_snprintf((char *)errbuf, errbuflen,
                   _("E593: Need at least %d lines"), min_rows());
      errmsg = errbuf;
    }
    Rows = min_rows();
  }
  if (Columns < MIN_COLUMNS && full_screen)
  {
    if (errbuf != NULL)
    {
      vim_snprintf((char *)errbuf, errbuflen,
                   _("E594: Need at least %d columns"), MIN_COLUMNS);
      errmsg = errbuf;
    }
    Columns = MIN_COLUMNS;
  }
  limit_screen_size();

  /*
     * If the screen (shell) height has been changed, assume it is the
     * physical screenheight.
     */
  if (old_Rows != Rows || old_Columns != Columns)
  {
    /* Changing the screen size is not allowed while updating the screen. */
    if (updating_screen)
      *pp = old_value;
    else if (full_screen)
      set_shellsize((int)Columns, (int)Rows, TRUE);
    else
    {
      /* Postpone the resizing; check the size and cmdline position for
	     * messages. */
      check_shellsize();
      if (cmdline_row > Rows - p_ch && Rows > p_ch)
        cmdline_row = Rows - p_ch;
    }
    if (p_window >= Rows || !option_was_set((char_u *)"window"))
      p_window = Rows - 1;
  }

  if (curbuf->b_p_ts <= 0)
  {
    errmsg = e_positive;
    curbuf->b_p_ts = 8;
  }
  if (p_tm < 0)
  {
    errmsg = e_positive;
    p_tm = 0;
  }
  if ((curwin->w_p_scr <= 0 || (curwin->w_p_scr > curwin->w_height && curwin->w_height > 0)) && full_screen)
  {
    if (pp == &(curwin->w_p_scr))
    {
      if (curwin->w_p_scr != 0)
        errmsg = e_scroll;
      win_comp_scroll(curwin);
    }
    /* If 'scroll' became invalid because of a side effect silently adjust
	 * it. */
    else if (curwin->w_p_scr <= 0)
      curwin->w_p_scr = 1;
    else /* curwin->w_p_scr > curwin->w_height */
      curwin->w_p_scr = curwin->w_height;
  }
  if (p_hi < 0)
  {
    errmsg = e_positive;
    p_hi = 0;
  }
  else if (p_hi > 10000)
  {
    errmsg = e_invarg;
    p_hi = 10000;
  }
  if (p_re < 0 || p_re > 2)
  {
    errmsg = e_invarg;
    p_re = 0;
  }
  if (p_report < 0)
  {
    errmsg = e_positive;
    p_report = 1;
  }
  if ((p_sj < -100 || p_sj >= Rows) && full_screen)
  {
    if (Rows != old_Rows) /* Rows changed, just adjust p_sj */
      p_sj = Rows / 2;
    else
    {
      errmsg = e_scroll;
      p_sj = 1;
    }
  }
  if (p_so < 0 && full_screen)
  {
    errmsg = e_positive;
    p_so = 0;
  }
  if (p_siso < 0 && full_screen)
  {
    errmsg = e_positive;
    p_siso = 0;
  }
  if (p_ut < 0)
  {
    errmsg = e_positive;
    p_ut = 2000;
  }
  if (p_ss < 0)
  {
    errmsg = e_positive;
    p_ss = 0;
  }

  /* May set global value for local option. */
  if ((opt_flags & (OPT_LOCAL | OPT_GLOBAL)) == 0)
    *(long *)get_varp_scope(&(options[opt_idx]), OPT_GLOBAL) = *pp;

  options[opt_idx].flags |= P_WAS_SET;

#if defined(FEAT_EVAL)
  // Don't do this while starting up, failure or recursively.
  if (!starting && errmsg == NULL && *get_vim_var_str(VV_OPTION_TYPE) == NUL)
  {
    char_u buf_old[11], buf_new[11], buf_type[7];

    vim_snprintf((char *)buf_old, 10, "%ld", old_value);
    vim_snprintf((char *)buf_new, 10, "%ld", value);
    vim_snprintf((char *)buf_type, 7, "%s", (opt_flags & OPT_LOCAL) ? "local" : "global");
    set_vim_var_string(VV_OPTION_NEW, buf_new, -1);
    set_vim_var_string(VV_OPTION_OLD, buf_old, -1);
    set_vim_var_string(VV_OPTION_TYPE, buf_type, -1);
    apply_autocmds(EVENT_OPTIONSET, (char_u *)options[opt_idx].fullname, NULL, FALSE, NULL);
    reset_v_option_vars();
  }
#endif

  comp_col(); /* in case 'columns' or 'ls' changed */
  if (curwin->w_curswant != MAXCOL && (options[opt_idx].flags & (P_CURSWANT | P_RALL)) != 0)
    curwin->w_set_curswant = TRUE;
  check_redraw(options[opt_idx].flags);

  return errmsg;
}

/*
 * Called after an option changed: check if something needs to be redrawn.
 */
static void
check_redraw(long_u flags)
{
  /* Careful: P_RCLR and P_RALL are a combination of other P_ flags */
  int doclear = (flags & P_RCLR) == P_RCLR;
  int all = ((flags & P_RALL) == P_RALL || doclear);

  if ((flags & P_RSTAT) || all) /* mark all status lines dirty */
    status_redraw_all();

  if ((flags & P_RBUF) || (flags & P_RWIN) || all)
    changed_window_setting();
  if (flags & P_RBUF)
    redraw_curbuf_later(NOT_VALID);
  if (flags & P_RWINONLY)
    redraw_later(NOT_VALID);
  if (doclear)
    redraw_all_later(CLEAR);
  else if (all)
    redraw_all_later(NOT_VALID);
}

/*
 * Find index for option 'arg'.
 * Return -1 if not found.
 */
static int
findoption(char_u *arg)
{
  int opt_idx;
  char *s, *p;
  static short quick_tab[27] = {0, 0}; /* quick access table */
  int is_term_opt;

  /*
     * For first call: Initialize the quick-access table.
     * It contains the index for the first option that starts with a certain
     * letter.  There are 26 letters, plus the first "t_" option.
     */
  if (quick_tab[1] == 0)
  {
    p = options[0].fullname;
    for (opt_idx = 1; (s = options[opt_idx].fullname) != NULL; opt_idx++)
    {
      if (s[0] != p[0])
      {
        if (s[0] == 't' && s[1] == '_')
          quick_tab[26] = opt_idx;
        else
          quick_tab[CharOrdLow(s[0])] = opt_idx;
      }
      p = s;
    }
  }

  /*
     * Check for name starting with an illegal character.
     */
#ifdef EBCDIC
  if (!islower(arg[0]))
#else
  if (arg[0] < 'a' || arg[0] > 'z')
#endif
    return -1;

  is_term_opt = (arg[0] == 't' && arg[1] == '_');
  if (is_term_opt)
    opt_idx = quick_tab[26];
  else
    opt_idx = quick_tab[CharOrdLow(arg[0])];
  for (; (s = options[opt_idx].fullname) != NULL; opt_idx++)
  {
    if (STRCMP(arg, s) == 0) /* match full name */
      break;
  }
  if (s == NULL && !is_term_opt)
  {
    opt_idx = quick_tab[CharOrdLow(arg[0])];
    for (; options[opt_idx].fullname != NULL; opt_idx++)
    {
      s = options[opt_idx].shortname;
      if (s != NULL && STRCMP(arg, s) == 0) /* match short name */
        break;
      s = NULL;
    }
  }
  if (s == NULL)
    opt_idx = -1;
  return opt_idx;
}

#if defined(FEAT_EVAL) || defined(FEAT_MZSCHEME)
/*
 * Get the value for an option.
 *
 * Returns:
 * Number or Toggle option: 1, *numval gets value.
 *	     String option: 0, *stringval gets allocated string.
 * Hidden Number or Toggle option: -1.
 *	     hidden String option: -2.
 *		   unknown option: -3.
 */
int get_option_value(
    char_u *name,
    long *numval,
    char_u **stringval, /* NULL when only checking existence */
    int opt_flags)
{
  int opt_idx;
  char_u *varp;

  opt_idx = findoption(name);
  if (opt_idx < 0) /* unknown option */
  {
    int key;

    if (STRLEN(name) == 4 && name[0] == 't' && name[1] == '_' && (key = find_key_option(name, FALSE)) != 0)
    {
      char_u key_name[2];
      char_u *p;

      if (key < 0)
      {
        key_name[0] = KEY2TERMCAP0(key);
        key_name[1] = KEY2TERMCAP1(key);
      }
      else
      {
        key_name[0] = KS_KEY;
        key_name[1] = (key & 0xff);
      }
      p = find_termcode(key_name);
      if (p != NULL)
      {
        if (stringval != NULL)
          *stringval = vim_strsave(p);
        return 0;
      }
    }
    return -3;
  }

  varp = get_varp_scope(&(options[opt_idx]), opt_flags);

  if (options[opt_idx].flags & P_STRING)
  {
    if (varp == NULL) /* hidden option */
      return -2;
    if (stringval != NULL)
    {
      *stringval = vim_strsave(*(char_u **)(varp));
    }
    return 0;
  }

  if (varp == NULL) /* hidden option */
    return -1;
  if (options[opt_idx].flags & P_NUM)
    *numval = *(long *)varp;
  else
  {
    /* Special case: 'modified' is b_changed, but we also want to consider
	 * it set when 'ff' or 'fenc' changed. */
    if ((int *)varp == &curbuf->b_changed)
      *numval = curbufIsChanged();
    else
      *numval = (long)*(int *)varp;
  }
  return 1;
}
#endif

#if defined(FEAT_PYTHON) || defined(FEAT_PYTHON3) || defined(PROTO)
/*
 * Returns the option attributes and its value. Unlike the above function it
 * will return either global value or local value of the option depending on
 * what was requested, but it will never return global value if it was
 * requested to return local one and vice versa. Neither it will return
 * buffer-local value if it was requested to return window-local one.
 *
 * Pretends that option is absent if it is not present in the requested scope
 * (i.e. has no global, window-local or buffer-local value depending on
 * opt_type). Uses
 *
 * Returned flags:
 *       0 hidden or unknown option, also option that does not have requested
 *	   type (see SREQ_* in vim.h)
 *  see SOPT_* in vim.h for other flags
 *
 * Possible opt_type values: see SREQ_* in vim.h
 */
int get_option_value_strict(
    char_u *name,
    long *numval,
    char_u **stringval, /* NULL when only obtaining attributes */
    int opt_type,
    void *from)
{
  int opt_idx;
  char_u *varp = NULL;
  struct vimoption *p;
  int r = 0;

  opt_idx = findoption(name);
  if (opt_idx < 0)
    return 0;

  p = &(options[opt_idx]);

  /* Hidden option */
  if (p->var == NULL)
    return 0;

  if (p->flags & P_BOOL)
    r |= SOPT_BOOL;
  else if (p->flags & P_NUM)
    r |= SOPT_NUM;
  else if (p->flags & P_STRING)
    r |= SOPT_STRING;

  if (p->indir == PV_NONE)
  {
    if (opt_type == SREQ_GLOBAL)
      r |= SOPT_GLOBAL;
    else
      return 0; /* Did not request global-only option */
  }
  else
  {
    if (p->indir & PV_BOTH)
      r |= SOPT_GLOBAL;
    else if (opt_type == SREQ_GLOBAL)
      return 0; /* Requested global option */

    if (p->indir & PV_WIN)
    {
      if (opt_type == SREQ_BUF)
        return 0; /* Did not request window-local option */
      else
        r |= SOPT_WIN;
    }
    else if (p->indir & PV_BUF)
    {
      if (opt_type == SREQ_WIN)
        return 0; /* Did not request buffer-local option */
      else
        r |= SOPT_BUF;
    }
  }

  if (stringval == NULL)
    return r;

  if (opt_type == SREQ_GLOBAL)
    varp = p->var;
  else
  {
    if (opt_type == SREQ_BUF)
    {
      /* Special case: 'modified' is b_changed, but we also want to
	     * consider it set when 'ff' or 'fenc' changed. */
      if (p->indir == PV_MOD)
      {
        *numval = bufIsChanged((buf_T *)from);
        varp = NULL;
      }
      else
      {
        buf_T *save_curbuf = curbuf;

        // only getting a pointer, no need to use aucmd_prepbuf()
        curbuf = (buf_T *)from;
        curwin->w_buffer = curbuf;
        varp = get_varp(p);
        curbuf = save_curbuf;
        curwin->w_buffer = curbuf;
      }
    }
    else if (opt_type == SREQ_WIN)
    {
      win_T *save_curwin = curwin;

      curwin = (win_T *)from;
      curbuf = curwin->w_buffer;
      varp = get_varp(p);
      curwin = save_curwin;
      curbuf = curwin->w_buffer;
    }
    if (varp == p->var)
      return (r | SOPT_UNSET);
  }

  if (varp != NULL)
  {
    if (p->flags & P_STRING)
      *stringval = vim_strsave(*(char_u **)(varp));
    else if (p->flags & P_NUM)
      *numval = *(long *)varp;
    else
      *numval = *(int *)varp;
  }

  return r;
}

/*
 * Iterate over options. First argument is a pointer to a pointer to a
 * structure inside options[] array, second is option type like in the above
 * function.
 *
 * If first argument points to NULL it is assumed that iteration just started
 * and caller needs the very first value.
 * If first argument points to the end marker function returns NULL and sets
 * first argument to NULL.
 *
 * Returns full option name for current option on each call.
 */
char_u *
option_iter_next(void **option, int opt_type)
{
  struct vimoption *ret = NULL;
  do
  {
    if (*option == NULL)
      *option = (void *)options;
    else if (((struct vimoption *)(*option))->fullname == NULL)
    {
      *option = NULL;
      return NULL;
    }
    else
      *option = (void *)(((struct vimoption *)(*option)) + 1);

    ret = ((struct vimoption *)(*option));

    /* Hidden option */
    if (ret->var == NULL)
    {
      ret = NULL;
      continue;
    }

    switch (opt_type)
    {
    case SREQ_GLOBAL:
      if (!(ret->indir == PV_NONE || ret->indir & PV_BOTH))
        ret = NULL;
      break;
    case SREQ_BUF:
      if (!(ret->indir & PV_BUF))
        ret = NULL;
      break;
    case SREQ_WIN:
      if (!(ret->indir & PV_WIN))
        ret = NULL;
      break;
    default:
      internal_error("option_iter_next()");
      return NULL;
    }
  } while (ret == NULL);

  return (char_u *)ret->fullname;
}
#endif

/*
 * Set the value of option "name".
 * Use "string" for string options, use "number" for other options.
 *
 * Returns NULL on success or error message on error.
 */
char *
set_option_value(
    char_u *name,
    long number,
    char_u *string,
    int opt_flags) /* OPT_LOCAL or 0 (both) */
{
  int opt_idx;
  char_u *varp;
  long_u flags;

  opt_idx = findoption(name);
  if (opt_idx < 0)
  {
    int key;

    if (STRLEN(name) == 4 && name[0] == 't' && name[1] == '_' && (key = find_key_option(name, FALSE)) != 0)
    {
      char_u key_name[2];

      if (key < 0)
      {
        key_name[0] = KEY2TERMCAP0(key);
        key_name[1] = KEY2TERMCAP1(key);
      }
      else
      {
        key_name[0] = KS_KEY;
        key_name[1] = (key & 0xff);
      }
      add_termcode(key_name, string, FALSE);
      if (full_screen)
        ttest(FALSE);
      redraw_all_later(CLEAR);
      return NULL;
    }

    semsg(_("E355: Unknown option: %s"), name);
  }
  else
  {
    flags = options[opt_idx].flags;
#ifdef HAVE_SANDBOX
    /* Disallow changing some options in the sandbox */
    if (sandbox > 0 && (flags & P_SECURE))
    {
      emsg(_(e_sandbox));
      return NULL;
    }
#endif
    if (flags & P_STRING)
      return set_string_option(opt_idx, string, opt_flags);
    else
    {
      varp = get_varp_scope(&(options[opt_idx]), opt_flags);
      if (varp != NULL) /* hidden option is not changed */
      {
        if (number == 0 && string != NULL)
        {
          int idx;

          /* Either we are given a string or we are setting option
		     * to zero. */
          for (idx = 0; string[idx] == '0'; ++idx)
            ;
          if (string[idx] != NUL || idx == 0)
          {
            /* There's another character after zeros or the string
			 * is empty.  In both cases, we are trying to set a
			 * num option using a string. */
            semsg(_("E521: Number required: &%s = '%s'"),
                  name, string);
            return NULL; /* do nothing as we hit an error */
          }
        }
        if (flags & P_NUM)
          return set_num_option(opt_idx, varp, number,
                                NULL, 0, opt_flags);
        else
          return set_bool_option(opt_idx, varp, (int)number,
                                 opt_flags);
      }
    }
  }
  return NULL;
}

/*
 * Get the terminal code for a terminal option.
 * Returns NULL when not found.
 */
char_u *
get_term_code(char_u *tname)
{
  int opt_idx;
  char_u *varp;

  if (tname[0] != 't' || tname[1] != '_' ||
      tname[2] == NUL || tname[3] == NUL)
    return NULL;
  if ((opt_idx = findoption(tname)) >= 0)
  {
    varp = get_varp(&(options[opt_idx]));
    if (varp != NULL)
      varp = *(char_u **)(varp);
    return varp;
  }
  return find_termcode(tname + 2);
}

char_u *
get_highlight_default(void)
{
  int i;

  i = findoption((char_u *)"hl");
  if (i >= 0)
    return options[i].def_val[VI_DEFAULT];
  return (char_u *)NULL;
}

char_u *
get_encoding_default(void)
{
  int i;

  i = findoption((char_u *)"enc");
  if (i >= 0)
    return options[i].def_val[VI_DEFAULT];
  return (char_u *)NULL;
}

/*
 * Translate a string like "t_xx", "<t_xx>" or "<S-Tab>" to a key number.
 * When "has_lt" is true there is a '<' before "*arg_arg".
 * Returns 0 when the key is not recognized.
 */
static int
find_key_option(char_u *arg_arg, int has_lt)
{
  int key = 0;
  int modifiers;
  char_u *arg = arg_arg;

  /*
     * Don't use get_special_key_code() for t_xx, we don't want it to call
     * add_termcap_entry().
     */
  if (arg[0] == 't' && arg[1] == '_' && arg[2] && arg[3])
    key = TERMCAP2KEY(arg[2], arg[3]);
  else if (has_lt)
  {
    --arg; /* put arg at the '<' */
    modifiers = 0;
    key = find_special_key(&arg, &modifiers, TRUE, TRUE, FALSE);
    if (modifiers) /* can't handle modifiers here */
      key = 0;
  }
  return key;
}

/*
 * if 'all' == 0: show changed options
 * if 'all' == 1: show all normal options
 * if 'all' == 2: show all terminal options
 */
static void
showoptions(
    int all,
    int opt_flags) /* OPT_LOCAL and/or OPT_GLOBAL */
{
  struct vimoption *p;
  int col;
  int isterm;
  char_u *varp;
  struct vimoption **items;
  int item_count;
  int run;
  int row, rows;
  int cols;
  int i;
  int len;

#define INC 20
#define GAP 3

  items = ALLOC_MULT(struct vimoption *, PARAM_COUNT);
  if (items == NULL)
    return;

  /* Highlight title */
  if (all == 2)
    msg_puts_title(_("\n--- Terminal codes ---"));
  else if (opt_flags & OPT_GLOBAL)
    msg_puts_title(_("\n--- Global option values ---"));
  else if (opt_flags & OPT_LOCAL)
    msg_puts_title(_("\n--- Local option values ---"));
  else
    msg_puts_title(_("\n--- Options ---"));

  /*
     * do the loop two times:
     * 1. display the short items
     * 2. display the long items (only strings and numbers)
     */
  for (run = 1; run <= 2 && !got_int; ++run)
  {
    /*
	 * collect the items in items[]
	 */
    item_count = 0;
    for (p = &options[0]; p->fullname != NULL; p++)
    {
      // apply :filter /pat/
      if (message_filtered((char_u *)p->fullname))
        continue;

      varp = NULL;
      isterm = istermoption(p);
      if (opt_flags != 0)
      {
        if (p->indir != PV_NONE && !isterm)
          varp = get_varp_scope(p, opt_flags);
      }
      else
        varp = get_varp(p);
      if (varp != NULL && ((all == 2 && isterm) || (all == 1 && !isterm) || (all == 0 && !optval_default(p, varp, p_cp))))
      {
        if (p->flags & P_BOOL)
          len = 1; /* a toggle option fits always */
        else
        {
          option_value2string(p, opt_flags);
          len = (int)STRLEN(p->fullname) + vim_strsize(NameBuff) + 1;
        }
        if ((len <= INC - GAP && run == 1) ||
            (len > INC - GAP && run == 2))
          items[item_count++] = p;
      }
    }

    /*
	 * display the items
	 */
    if (run == 1)
    {
      cols = (Columns + GAP - 3) / INC;
      if (cols == 0)
        cols = 1;
      rows = (item_count + cols - 1) / cols;
    }
    else /* run == 2 */
      rows = item_count;
    for (row = 0; row < rows && !got_int; ++row)
    {
      msg_putchar('\n'); /* go to next line */
      if (got_int)       /* 'q' typed in more */
        break;
      col = 0;
      for (i = row; i < item_count; i += rows)
      {
        msg_col = col; /* make columns */
        showoneopt(items[i], opt_flags);
        col += INC;
      }
      ui_breakcheck();
    }
  }
  vim_free(items);
}

/*
 * Return TRUE if option "p" has its default value.
 */
static int
optval_default(struct vimoption *p, char_u *varp, int compatible)
{
  int dvi;

  if (varp == NULL)
    return TRUE; /* hidden option is always at default */
  dvi = ((p->flags & P_VI_DEF) || compatible) ? VI_DEFAULT : VIM_DEFAULT;
  if (p->flags & P_NUM)
    return (*(long *)varp == (long)(long_i)p->def_val[dvi]);
  if (p->flags & P_BOOL)
    /* the cast to long is required for Manx C, long_i is
			 * needed for MSVC */
    return (*(int *)varp == (int)(long)(long_i)p->def_val[dvi]);
  /* P_STRING */
  return (STRCMP(*(char_u **)varp, p->def_val[dvi]) == 0);
}

/*
 * showoneopt: show the value of one option
 * must not be called with a hidden option!
 */
static void
showoneopt(
    struct vimoption *p,
    int opt_flags) /* OPT_LOCAL or OPT_GLOBAL */
{
  char_u *varp;
  int save_silent = silent_mode;

  silent_mode = FALSE;
  info_message = TRUE; /* use mch_msg(), not mch_errmsg() */

  varp = get_varp_scope(p, opt_flags);

  msg_T *msg = msg2_create(MSG_INFO);

  /* for 'modified' we also need to check if 'ff' or 'fenc' changed. */
  if ((p->flags & P_BOOL) && ((int *)varp == &curbuf->b_changed
                                  ? !curbufIsChanged()
                                  : !*(int *)varp))
    msg2_put("no", msg);
  else if ((p->flags & P_BOOL) && *(int *)varp < 0)
    msg2_put("--", msg);
  else
    msg2_put("  ", msg);
  msg2_put(p->fullname, msg);
  if (!(p->flags & P_BOOL))
  {
    msg2_put("=", msg);
    /* put value string in NameBuff */
    option_value2string(p, opt_flags);
    msg2_put(NameBuff, msg);
  }

  msg2_send(msg);
  msg2_free(msg);

  silent_mode = save_silent;
  info_message = FALSE;
}

/*
 * Write modified options as ":set" commands to a file.
 *
 * There are three values for "opt_flags":
 * OPT_GLOBAL:		   Write global option values and fresh values of
 *			   buffer-local options (used for start of a session
 *			   file).
 * OPT_GLOBAL + OPT_LOCAL: Idem, add fresh values of window-local options for
 *			   curwin (used for a vimrc file).
 * OPT_LOCAL:		   Write buffer-local option values for curbuf, fresh
 *			   and local values for window-local options of
 *			   curwin.  Local values are also written when at the
 *			   default value, because a modeline or autocommand
 *			   may have set them when doing ":edit file" and the
 *			   user has set them back at the default or fresh
 *			   value.
 *			   When "local_only" is TRUE, don't write fresh
 *			   values, only local values (for ":mkview").
 * (fresh value = value used for a new buffer or window for a local option).
 *
 * Return FAIL on error, OK otherwise.
 */
int makeset(FILE *fd, int opt_flags, int local_only)
{
  struct vimoption *p;
  char_u *varp;              /* currently used value */
  char_u *varp_fresh;        /* local value */
  char_u *varp_local = NULL; /* fresh value */
  char *cmd;
  int round;
  int pri;

  /*
     * The options that don't have a default (terminal name, columns, lines)
     * are never written.  Terminal options are also not written.
     * Do the loop over "options[]" twice: once for options with the
     * P_PRI_MKRC flag and once without.
     */
  for (pri = 1; pri >= 0; --pri)
  {
    for (p = &options[0]; !istermoption(p); p++)
      if (!(p->flags & P_NO_MKRC) && !istermoption(p) && ((pri == 1) == ((p->flags & P_PRI_MKRC) != 0)))
      {
        /* skip global option when only doing locals */
        if (p->indir == PV_NONE && !(opt_flags & OPT_GLOBAL))
          continue;

        /* Do not store options like 'bufhidden' and 'syntax' in a vimrc
	     * file, they are always buffer-specific. */
        if ((opt_flags & OPT_GLOBAL) && (p->flags & P_NOGLOB))
          continue;

        /* Global values are only written when not at the default value. */
        varp = get_varp_scope(p, opt_flags);
        if ((opt_flags & OPT_GLOBAL) && optval_default(p, varp, p_cp))
          continue;

        round = 2;
        if (p->indir != PV_NONE)
        {
          if (p->var == VAR_WIN)
          {
            /* skip window-local option when only doing globals */
            if (!(opt_flags & OPT_LOCAL))
              continue;
            /* When fresh value of window-local option is not at the
		     * default, need to write it too. */
            if (!(opt_flags & OPT_GLOBAL) && !local_only)
            {
              varp_fresh = get_varp_scope(p, OPT_GLOBAL);
              if (!optval_default(p, varp_fresh, p_cp))
              {
                round = 1;
                varp_local = varp;
                varp = varp_fresh;
              }
            }
          }
        }

        /* Round 1: fresh value for window-local options.
	     * Round 2: other values */
        for (; round <= 2; varp = varp_local, ++round)
        {
          if (round == 1 || (opt_flags & OPT_GLOBAL))
            cmd = "set";
          else
            cmd = "setlocal";

          if (p->flags & P_BOOL)
          {
            if (put_setbool(fd, cmd, p->fullname, *(int *)varp) == FAIL)
              return FAIL;
          }
          else if (p->flags & P_NUM)
          {
            if (put_setnum(fd, cmd, p->fullname, (long *)varp) == FAIL)
              return FAIL;
          }
          else /* P_STRING */
          {
            int do_endif = FALSE;

            /* Don't set 'syntax' and 'filetype' again if the value is
		     * already right, avoids reloading the syntax file. */
            if (
                p->indir == PV_FT)
            {
              if (fprintf(fd, "if &%s != '%s'", p->fullname,
                          *(char_u **)(varp)) < 0 ||
                  put_eol(fd) < 0)
                return FAIL;
              do_endif = TRUE;
            }
            if (put_setstring(fd, cmd, p->fullname, (char_u **)varp,
                              p->flags) == FAIL)
              return FAIL;
            if (do_endif)
            {
              if (put_line(fd, "endif") == FAIL)
                return FAIL;
            }
          }
        }
      }
  }
  return OK;
}

#if defined(FEAT_FOLDING) || defined(PROTO)
/*
 * Generate set commands for the local fold options only.  Used when
 * 'sessionoptions' or 'viewoptions' contains "folds" but not "options".
 */
int makefoldset(FILE *fd)
{
  if (put_setstring(fd, "setlocal", "fdm", &curwin->w_p_fdm, 0) == FAIL
#ifdef FEAT_EVAL
      || put_setstring(fd, "setlocal", "fde", &curwin->w_p_fde, 0) == FAIL
#endif
      || put_setstring(fd, "setlocal", "fmr", &curwin->w_p_fmr, 0) == FAIL || put_setstring(fd, "setlocal", "fdi", &curwin->w_p_fdi, 0) == FAIL || put_setnum(fd, "setlocal", "fdl", &curwin->w_p_fdl) == FAIL || put_setnum(fd, "setlocal", "fml", &curwin->w_p_fml) == FAIL || put_setnum(fd, "setlocal", "fdn", &curwin->w_p_fdn) == FAIL || put_setbool(fd, "setlocal", "fen", curwin->w_p_fen) == FAIL)
    return FAIL;

  return OK;
}
#endif

static int
put_setstring(
    FILE *fd,
    char *cmd,
    char *name,
    char_u **valuep,
    long_u flags)
{
  char_u *s;
  char_u *buf = NULL;
  char_u *part = NULL;
  char_u *p;

  if (fprintf(fd, "%s %s=", cmd, name) < 0)
    return FAIL;
  if (*valuep != NULL)
  {
    /* Output 'pastetoggle' as key names.  For other
	 * options some characters have to be escaped with
	 * CTRL-V or backslash */
    if (valuep == &p_pt)
    {
      s = *valuep;
      while (*s != NUL)
        if (put_escstr(fd, str2special(&s, FALSE), 2) == FAIL)
          return FAIL;
    }
    // expand the option value, replace $HOME by ~
    else if ((flags & P_EXPAND) != 0)
    {
      int size = (int)STRLEN(*valuep) + 1;

      // replace home directory in the whole option value into "buf"
      buf = alloc(size);
      if (buf == NULL)
        goto fail;
      home_replace(NULL, *valuep, buf, size, FALSE);

      // If the option value is longer than MAXPATHL, we need to append
      // earch comma separated part of the option separately, so that it
      // can be expanded when read back.
      if (size >= MAXPATHL && (flags & P_COMMA) != 0 && vim_strchr(*valuep, ',') != NULL)
      {
        part = alloc(size);
        if (part == NULL)
          goto fail;

        // write line break to clear the option, e.g. ':set rtp='
        if (put_eol(fd) == FAIL)
          goto fail;

        p = buf;
        while (*p != NUL)
        {
          // for each comma separated option part, append value to
          // the option, :set rtp+=value
          if (fprintf(fd, "%s %s+=", cmd, name) < 0)
            goto fail;
          (void)copy_option_part(&p, part, size, ",");
          if (put_escstr(fd, part, 2) == FAIL || put_eol(fd) == FAIL)
            goto fail;
        }
        vim_free(buf);
        vim_free(part);
        return OK;
      }
      if (put_escstr(fd, buf, 2) == FAIL)
      {
        vim_free(buf);
        return FAIL;
      }
      vim_free(buf);
    }
    else if (put_escstr(fd, *valuep, 2) == FAIL)
      return FAIL;
  }
  if (put_eol(fd) < 0)
    return FAIL;
  return OK;
fail:
  vim_free(buf);
  vim_free(part);
  return FAIL;
}

static int
put_setnum(
    FILE *fd,
    char *cmd,
    char *name,
    long *valuep)
{
  long wc;

  if (fprintf(fd, "%s %s=", cmd, name) < 0)
    return FAIL;
  if (wc_use_keyname((char_u *)valuep, &wc))
  {
    /* print 'wildchar' and 'wildcharm' as a key name */
    if (fputs((char *)get_special_key_name((int)wc, 0), fd) < 0)
      return FAIL;
  }
  else if (fprintf(fd, "%ld", *valuep) < 0)
    return FAIL;
  if (put_eol(fd) < 0)
    return FAIL;
  return OK;
}

static int
put_setbool(
    FILE *fd,
    char *cmd,
    char *name,
    int value)
{
  if (value < 0) /* global/local option using global value */
    return OK;
  if (fprintf(fd, "%s %s%s", cmd, value ? "" : "no", name) < 0 || put_eol(fd) < 0)
    return FAIL;
  return OK;
}

/*
 * Clear all the terminal options.
 * If the option has been allocated, free the memory.
 * Terminal options are never hidden or indirect.
 */
void clear_termoptions(void)
{
  /*
     * Reset a few things before clearing the old options. This may cause
     * outputting a few things that the terminal doesn't understand, but the
     * screen will be cleared later, so this is OK.
     */
  stoptermcap(); /* stop termcap mode */

  free_termoptions();
}

void free_termoptions(void)
{
  struct vimoption *p;

  for (p = options; p->fullname != NULL; p++)
    if (istermoption(p))
    {
      if (p->flags & P_ALLOCED)
        free_string_option(*(char_u **)(p->var));
      if (p->flags & P_DEF_ALLOCED)
        free_string_option(p->def_val[VI_DEFAULT]);
      *(char_u **)(p->var) = empty_option;
      p->def_val[VI_DEFAULT] = empty_option;
      p->flags &= ~(P_ALLOCED | P_DEF_ALLOCED);
#ifdef FEAT_EVAL
      // remember where the option was cleared
      set_option_sctx_idx((int)(p - options), OPT_GLOBAL, current_sctx);
#endif
    }
  clear_termcodes();
}

/*
 * Free the string for one term option, if it was allocated.
 * Set the string to empty_option and clear allocated flag.
 * "var" points to the option value.
 */
void free_one_termoption(char_u *var)
{
  struct vimoption *p;

  for (p = &options[0]; p->fullname != NULL; p++)
    if (p->var == var)
    {
      if (p->flags & P_ALLOCED)
        free_string_option(*(char_u **)(p->var));
      *(char_u **)(p->var) = empty_option;
      p->flags &= ~P_ALLOCED;
      break;
    }
}

/*
 * Set the terminal option defaults to the current value.
 * Used after setting the terminal name.
 */
void set_term_defaults(void)
{
  struct vimoption *p;

  for (p = &options[0]; p->fullname != NULL; p++)
  {
    if (istermoption(p) && p->def_val[VI_DEFAULT] != *(char_u **)(p->var))
    {
      if (p->flags & P_DEF_ALLOCED)
      {
        free_string_option(p->def_val[VI_DEFAULT]);
        p->flags &= ~P_DEF_ALLOCED;
      }
      p->def_val[VI_DEFAULT] = *(char_u **)(p->var);
      if (p->flags & P_ALLOCED)
      {
        p->flags |= P_DEF_ALLOCED;
        p->flags &= ~P_ALLOCED; /* don't free the value now */
      }
    }
  }
}

/*
 * return TRUE if 'p' starts with 't_'
 */
static int
istermoption(struct vimoption *p)
{
  return (p->fullname[0] == 't' && p->fullname[1] == '_');
}

/*
 * Compute columns for ruler and shown command. 'sc_col' is also used to
 * decide what the maximum length of a message on the status line can be.
 * If there is a status line for the last window, 'sc_col' is independent
 * of 'ru_col'.
 */

#define COL_RULER 17 /* columns needed by standard ruler */

void comp_col(void)
{
  sc_col = Columns;
  ru_col = Columns;
}

#if defined(FEAT_PYTHON) || defined(FEAT_PYTHON3) || defined(PROTO)
/*
 * Unset local option value, similar to ":set opt<".
 */
void unset_global_local_option(char_u *name, void *from)
{
  struct vimoption *p;
  int opt_idx;
  buf_T *buf = (buf_T *)from;

  opt_idx = findoption(name);
  if (opt_idx < 0)
    return;
  p = &(options[opt_idx]);

  switch ((int)p->indir)
  {
  /* global option with local value: use local value if it's been set */
  case PV_EP:
    clear_string_option(&buf->b_p_ep);
    break;
  case PV_KP:
    clear_string_option(&buf->b_p_kp);
    break;
  case PV_PATH:
    clear_string_option(&buf->b_p_path);
    break;
  case PV_AR:
    buf->b_p_ar = -1;
    break;
  case PV_BKC:
    clear_string_option(&buf->b_p_bkc);
    buf->b_bkc_flags = 0;
    break;
  case PV_TAGS:
    clear_string_option(&buf->b_p_tags);
    break;
  case PV_TC:
    clear_string_option(&buf->b_p_tc);
    buf->b_tc_flags = 0;
    break;
  case PV_SISO:
    curwin->w_p_siso = -1;
    break;
  case PV_SO:
    curwin->w_p_so = -1;
    break;
#ifdef FEAT_FIND_ID
  case PV_DEF:
    clear_string_option(&buf->b_p_def);
    break;
  case PV_INC:
    clear_string_option(&buf->b_p_inc);
    break;
#endif
  case PV_FP:
    clear_string_option(&buf->b_p_fp);
    break;
#ifdef FEAT_QUICKFIX
  case PV_EFM:
    clear_string_option(&buf->b_p_efm);
    break;
  case PV_GP:
    clear_string_option(&buf->b_p_gp);
    break;
  case PV_MP:
    clear_string_option(&buf->b_p_mp);
    break;
#endif
#if defined(FEAT_BEVAL) && defined(FEAT_EVAL)
  case PV_BEXPR:
    clear_string_option(&buf->b_p_bexpr);
    break;
#endif
  case PV_UL:
    buf->b_p_ul = NO_LOCAL_UNDOLEVEL;
    break;
  case PV_MENC:
    clear_string_option(&buf->b_p_menc);
    break;
  }
}
#endif

/*
 * Get pointer to option variable, depending on local or global scope.
 */
static char_u *
get_varp_scope(struct vimoption *p, int opt_flags)
{
  if ((opt_flags & OPT_GLOBAL) && p->indir != PV_NONE)
  {
    if (p->var == VAR_WIN)
      return (char_u *)GLOBAL_WO(get_varp(p));
    return p->var;
  }
  if ((opt_flags & OPT_LOCAL) && ((int)p->indir & PV_BOTH))
  {
    switch ((int)p->indir)
    {
    case PV_FP:
      return (char_u *)&(curbuf->b_p_fp);
#ifdef FEAT_QUICKFIX
    case PV_EFM:
      return (char_u *)&(curbuf->b_p_efm);
    case PV_GP:
      return (char_u *)&(curbuf->b_p_gp);
    case PV_MP:
      return (char_u *)&(curbuf->b_p_mp);
#endif
    case PV_EP:
      return (char_u *)&(curbuf->b_p_ep);
    case PV_KP:
      return (char_u *)&(curbuf->b_p_kp);
    case PV_PATH:
      return (char_u *)&(curbuf->b_p_path);
    case PV_AR:
      return (char_u *)&(curbuf->b_p_ar);
    case PV_TAGS:
      return (char_u *)&(curbuf->b_p_tags);
    case PV_TC:
      return (char_u *)&(curbuf->b_p_tc);
    case PV_SISO:
      return (char_u *)&(curwin->w_p_siso);
    case PV_SO:
      return (char_u *)&(curwin->w_p_so);
#ifdef FEAT_FIND_ID
    case PV_DEF:
      return (char_u *)&(curbuf->b_p_def);
    case PV_INC:
      return (char_u *)&(curbuf->b_p_inc);
#endif
#if defined(FEAT_BEVAL) && defined(FEAT_EVAL)
    case PV_BEXPR:
      return (char_u *)&(curbuf->b_p_bexpr);
#endif
    case PV_UL:
      return (char_u *)&(curbuf->b_p_ul);
    case PV_BKC:
      return (char_u *)&(curbuf->b_p_bkc);
    case PV_MENC:
      return (char_u *)&(curbuf->b_p_menc);
    }
    return NULL; /* "cannot happen" */
  }
  return get_varp(p);
}

/*
 * Get pointer to option variable.
 */
static char_u *
get_varp(struct vimoption *p)
{
  /* hidden option, always return NULL */
  if (p->var == NULL)
    return NULL;

  switch ((int)p->indir)
  {
  case PV_NONE:
    return p->var;

  /* global option with local value: use local value if it's been set */
  case PV_EP:
    return *curbuf->b_p_ep != NUL
               ? (char_u *)&curbuf->b_p_ep
               : p->var;
  case PV_KP:
    return *curbuf->b_p_kp != NUL
               ? (char_u *)&curbuf->b_p_kp
               : p->var;
  case PV_PATH:
    return *curbuf->b_p_path != NUL
               ? (char_u *)&(curbuf->b_p_path)
               : p->var;
  case PV_AR:
    return curbuf->b_p_ar >= 0
               ? (char_u *)&(curbuf->b_p_ar)
               : p->var;
  case PV_TAGS:
    return *curbuf->b_p_tags != NUL
               ? (char_u *)&(curbuf->b_p_tags)
               : p->var;
  case PV_TC:
    return *curbuf->b_p_tc != NUL
               ? (char_u *)&(curbuf->b_p_tc)
               : p->var;
  case PV_BKC:
    return *curbuf->b_p_bkc != NUL
               ? (char_u *)&(curbuf->b_p_bkc)
               : p->var;
  case PV_SISO:
    return curwin->w_p_siso >= 0
               ? (char_u *)&(curwin->w_p_siso)
               : p->var;
  case PV_SO:
    return curwin->w_p_so >= 0
               ? (char_u *)&(curwin->w_p_so)
               : p->var;
#ifdef FEAT_FIND_ID
  case PV_DEF:
    return *curbuf->b_p_def != NUL
               ? (char_u *)&(curbuf->b_p_def)
               : p->var;
  case PV_INC:
    return *curbuf->b_p_inc != NUL
               ? (char_u *)&(curbuf->b_p_inc)
               : p->var;
#endif
  case PV_FP:
    return *curbuf->b_p_fp != NUL
               ? (char_u *)&(curbuf->b_p_fp)
               : p->var;
#ifdef FEAT_QUICKFIX
  case PV_EFM:
    return *curbuf->b_p_efm != NUL
               ? (char_u *)&(curbuf->b_p_efm)
               : p->var;
  case PV_GP:
    return *curbuf->b_p_gp != NUL
               ? (char_u *)&(curbuf->b_p_gp)
               : p->var;
  case PV_MP:
    return *curbuf->b_p_mp != NUL
               ? (char_u *)&(curbuf->b_p_mp)
               : p->var;
#endif
#if defined(FEAT_BEVAL) && defined(FEAT_EVAL)
  case PV_BEXPR:
    return *curbuf->b_p_bexpr != NUL
               ? (char_u *)&(curbuf->b_p_bexpr)
               : p->var;
#endif
  case PV_UL:
    return curbuf->b_p_ul != NO_LOCAL_UNDOLEVEL
               ? (char_u *)&(curbuf->b_p_ul)
               : p->var;
  case PV_MENC:
    return *curbuf->b_p_menc != NUL
               ? (char_u *)&(curbuf->b_p_menc)
               : p->var;

#ifdef FEAT_ARABIC
  case PV_ARAB:
    return (char_u *)&(curwin->w_p_arab);
#endif
  case PV_LIST:
    return (char_u *)&(curwin->w_p_list);
#ifdef FEAT_DIFF
  case PV_DIFF:
    return (char_u *)&(curwin->w_p_diff);
#endif
#ifdef FEAT_FOLDING
  case PV_FDC:
    return (char_u *)&(curwin->w_p_fdc);
  case PV_FEN:
    return (char_u *)&(curwin->w_p_fen);
  case PV_FDI:
    return (char_u *)&(curwin->w_p_fdi);
  case PV_FDL:
    return (char_u *)&(curwin->w_p_fdl);
  case PV_FDM:
    return (char_u *)&(curwin->w_p_fdm);
  case PV_FML:
    return (char_u *)&(curwin->w_p_fml);
  case PV_FDN:
    return (char_u *)&(curwin->w_p_fdn);
#ifdef FEAT_EVAL
  case PV_FDE:
    return (char_u *)&(curwin->w_p_fde);
  case PV_FDT:
    return (char_u *)&(curwin->w_p_fdt);
#endif
  case PV_FMR:
    return (char_u *)&(curwin->w_p_fmr);
#endif
  case PV_NU:
    return (char_u *)&(curwin->w_p_nu);
  case PV_RNU:
    return (char_u *)&(curwin->w_p_rnu);
#ifdef FEAT_LINEBREAK
  case PV_NUW:
    return (char_u *)&(curwin->w_p_nuw);
#endif
  case PV_WFH:
    return (char_u *)&(curwin->w_p_wfh);
  case PV_WFW:
    return (char_u *)&(curwin->w_p_wfw);
#if defined(FEAT_QUICKFIX)
  case PV_PVW:
    return (char_u *)&(curwin->w_p_pvw);
#endif
#ifdef FEAT_RIGHTLEFT
  case PV_RL:
    return (char_u *)&(curwin->w_p_rl);
  case PV_RLC:
    return (char_u *)&(curwin->w_p_rlc);
#endif
  case PV_SCROLL:
    return (char_u *)&(curwin->w_p_scr);
  case PV_WRAP:
    return (char_u *)&(curwin->w_p_wrap);
#ifdef FEAT_LINEBREAK
  case PV_LBR:
    return (char_u *)&(curwin->w_p_lbr);
  case PV_BRI:
    return (char_u *)&(curwin->w_p_bri);
  case PV_BRIOPT:
    return (char_u *)&(curwin->w_p_briopt);
#endif
  case PV_WCR:
    return (char_u *)&(curwin->w_p_wcr);
  case PV_SCBIND:
    return (char_u *)&(curwin->w_p_scb);
  case PV_CRBIND:
    return (char_u *)&(curwin->w_p_crb);
#ifdef FEAT_TERMINAL
  case PV_TWK:
    return (char_u *)&(curwin->w_p_twk);
  case PV_TWS:
    return (char_u *)&(curwin->w_p_tws);
  case PV_TWSL:
    return (char_u *)&(curbuf->b_p_twsl);
#endif

  case PV_AI:
    return (char_u *)&(curbuf->b_p_ai);
  case PV_BIN:
    return (char_u *)&(curbuf->b_p_bin);
  case PV_BOMB:
    return (char_u *)&(curbuf->b_p_bomb);
  case PV_BH:
    return (char_u *)&(curbuf->b_p_bh);
  case PV_BT:
    return (char_u *)&(curbuf->b_p_bt);
  case PV_BL:
    return (char_u *)&(curbuf->b_p_bl);
  case PV_CI:
    return (char_u *)&(curbuf->b_p_ci);
#if defined(FEAT_SMARTINDENT)
  case PV_CINW:
    return (char_u *)&(curbuf->b_p_cinw);
#endif
#ifdef FEAT_COMMENTS
  case PV_COM:
    return (char_u *)&(curbuf->b_p_com);
#endif
#ifdef FEAT_FOLDING
  case PV_CMS:
    return (char_u *)&(curbuf->b_p_cms);
#endif
#ifdef FEAT_EVAL
  case PV_TFU:
    return (char_u *)&(curbuf->b_p_tfu);
#endif
  case PV_EOL:
    return (char_u *)&(curbuf->b_p_eol);
  case PV_FIXEOL:
    return (char_u *)&(curbuf->b_p_fixeol);
  case PV_ET:
    return (char_u *)&(curbuf->b_p_et);
  case PV_FENC:
    return (char_u *)&(curbuf->b_p_fenc);
  case PV_FF:
    return (char_u *)&(curbuf->b_p_ff);
  case PV_FT:
    return (char_u *)&(curbuf->b_p_ft);
  case PV_FO:
    return (char_u *)&(curbuf->b_p_fo);
  case PV_FLP:
    return (char_u *)&(curbuf->b_p_flp);
  case PV_IMI:
    return (char_u *)&(curbuf->b_p_iminsert);
  case PV_IMS:
    return (char_u *)&(curbuf->b_p_imsearch);
  case PV_INF:
    return (char_u *)&(curbuf->b_p_inf);
  case PV_ISK:
    return (char_u *)&(curbuf->b_p_isk);
#ifdef FEAT_FIND_ID
#ifdef FEAT_EVAL
  case PV_INEX:
    return (char_u *)&(curbuf->b_p_inex);
#endif
#endif
#ifdef FEAT_EVAL
  case PV_FEX:
    return (char_u *)&(curbuf->b_p_fex);
#endif
  case PV_ML:
    return (char_u *)&(curbuf->b_p_ml);
  case PV_MPS:
    return (char_u *)&(curbuf->b_p_mps);
  case PV_MA:
    return (char_u *)&(curbuf->b_p_ma);
  case PV_MOD:
    return (char_u *)&(curbuf->b_changed);
  case PV_NF:
    return (char_u *)&(curbuf->b_p_nf);
  case PV_PI:
    return (char_u *)&(curbuf->b_p_pi);
#ifdef FEAT_TEXTOBJ
  case PV_QE:
    return (char_u *)&(curbuf->b_p_qe);
#endif
  case PV_RO:
    return (char_u *)&(curbuf->b_p_ro);
#ifdef FEAT_SMARTINDENT
  case PV_SI:
    return (char_u *)&(curbuf->b_p_si);
#endif
  case PV_SN:
    return (char_u *)&(curbuf->b_p_sn);
  case PV_STS:
    return (char_u *)&(curbuf->b_p_sts);
#ifdef FEAT_SEARCHPATH
  case PV_SUA:
    return (char_u *)&(curbuf->b_p_sua);
#endif
  case PV_SWF:
    return (char_u *)&(curbuf->b_p_swf);
  case PV_SW:
    return (char_u *)&(curbuf->b_p_sw);
  case PV_TS:
    return (char_u *)&(curbuf->b_p_ts);
  case PV_TW:
    return (char_u *)&(curbuf->b_p_tw);
  case PV_TX:
    return (char_u *)&(curbuf->b_p_tx);
#ifdef FEAT_PERSISTENT_UNDO
  case PV_UDF:
    return (char_u *)&(curbuf->b_p_udf);
#endif
  case PV_WM:
    return (char_u *)&(curbuf->b_p_wm);
#ifdef FEAT_KEYMAP
  case PV_KMAP:
    return (char_u *)&(curbuf->b_p_keymap);
#endif
#ifdef FEAT_SIGNS
  case PV_SCL:
    return (char_u *)&(curwin->w_p_scl);
#endif
#ifdef FEAT_VARTABS
  case PV_VSTS:
    return (char_u *)&(curbuf->b_p_vsts);
  case PV_VTS:
    return (char_u *)&(curbuf->b_p_vts);
#endif
  default:
    iemsg(_("E356: get_varp ERROR"));
  }
  /* always return a valid pointer to avoid a crash! */
  return (char_u *)&(curbuf->b_p_wm);
}

/*
 * Get the value of 'equalprg', either the buffer-local one or the global one.
 */
char_u *
get_equalprg(void)
{
  if (*curbuf->b_p_ep == NUL)
    return p_ep;
  return curbuf->b_p_ep;
}

/*
 * Copy options from one window to another.
 * Used when splitting a window.
 */
void win_copy_options(win_T *wp_from, win_T *wp_to)
{
  copy_winopt(&wp_from->w_onebuf_opt, &wp_to->w_onebuf_opt);
  copy_winopt(&wp_from->w_allbuf_opt, &wp_to->w_allbuf_opt);
#if defined(FEAT_LINEBREAK)
  briopt_check(wp_to);
#endif
}

/*
 * Copy the options from one winopt_T to another.
 * Doesn't free the old option values in "to", use clear_winopt() for that.
 * The 'scroll' option is not copied, because it depends on the window height.
 * The 'previewwindow' option is reset, there can be only one preview window.
 */
void copy_winopt(winopt_T *from, winopt_T *to)
{
#ifdef FEAT_ARABIC
  to->wo_arab = from->wo_arab;
#endif
  to->wo_list = from->wo_list;
  to->wo_nu = from->wo_nu;
  to->wo_rnu = from->wo_rnu;
#ifdef FEAT_LINEBREAK
  to->wo_nuw = from->wo_nuw;
#endif
#ifdef FEAT_RIGHTLEFT
  to->wo_rl = from->wo_rl;
  to->wo_rlc = vim_strsave(from->wo_rlc);
#endif
  to->wo_wrap = from->wo_wrap;
#ifdef FEAT_DIFF
  to->wo_wrap_save = from->wo_wrap_save;
#endif
#ifdef FEAT_LINEBREAK
  to->wo_lbr = from->wo_lbr;
  to->wo_bri = from->wo_bri;
  to->wo_briopt = vim_strsave(from->wo_briopt);
#endif
  to->wo_wcr = vim_strsave(from->wo_wcr);
  to->wo_scb = from->wo_scb;
  to->wo_scb_save = from->wo_scb_save;
  to->wo_crb = from->wo_crb;
  to->wo_crb_save = from->wo_crb_save;
#ifdef FEAT_DIFF
  to->wo_diff = from->wo_diff;
  to->wo_diff_saved = from->wo_diff_saved;
#endif
#ifdef FEAT_TERMINAL
  to->wo_twk = vim_strsave(from->wo_twk);
  to->wo_tws = vim_strsave(from->wo_tws);
#endif
#ifdef FEAT_FOLDING
  to->wo_fdc = from->wo_fdc;
  to->wo_fdc_save = from->wo_fdc_save;
  to->wo_fen = from->wo_fen;
  to->wo_fen_save = from->wo_fen_save;
  to->wo_fdi = vim_strsave(from->wo_fdi);
  to->wo_fml = from->wo_fml;
  to->wo_fdl = from->wo_fdl;
  to->wo_fdl_save = from->wo_fdl_save;
  to->wo_fdm = vim_strsave(from->wo_fdm);
  to->wo_fdm_save = from->wo_diff_saved
                        ? vim_strsave(from->wo_fdm_save)
                        : empty_option;
  to->wo_fdn = from->wo_fdn;
#ifdef FEAT_EVAL
  to->wo_fde = vim_strsave(from->wo_fde);
  to->wo_fdt = vim_strsave(from->wo_fdt);
#endif
  to->wo_fmr = vim_strsave(from->wo_fmr);
#endif
#ifdef FEAT_SIGNS
  to->wo_scl = vim_strsave(from->wo_scl);
#endif
  check_winopt(to); /* don't want NULL pointers */
}

/*
 * Check string options in a window for a NULL value.
 */
void check_win_options(win_T *win)
{
  check_winopt(&win->w_onebuf_opt);
  check_winopt(&win->w_allbuf_opt);
}

/*
 * Check for NULL pointers in a winopt_T and replace them with empty_option.
 */
static void
check_winopt(winopt_T *wop UNUSED)
{
#ifdef FEAT_FOLDING
  check_string_option(&wop->wo_fdi);
  check_string_option(&wop->wo_fdm);
  check_string_option(&wop->wo_fdm_save);
#ifdef FEAT_EVAL
  check_string_option(&wop->wo_fde);
  check_string_option(&wop->wo_fdt);
#endif
  check_string_option(&wop->wo_fmr);
#endif
#ifdef FEAT_SIGNS
  check_string_option(&wop->wo_scl);
#endif
#ifdef FEAT_RIGHTLEFT
  check_string_option(&wop->wo_rlc);
#endif
#ifdef FEAT_TERMINAL
  check_string_option(&wop->wo_twk);
  check_string_option(&wop->wo_tws);
#endif
#ifdef FEAT_LINEBREAK
  check_string_option(&wop->wo_briopt);
#endif
  check_string_option(&wop->wo_wcr);
}

/*
 * Free the allocated memory inside a winopt_T.
 */
void clear_winopt(winopt_T *wop UNUSED)
{
#ifdef FEAT_FOLDING
  clear_string_option(&wop->wo_fdi);
  clear_string_option(&wop->wo_fdm);
  clear_string_option(&wop->wo_fdm_save);
#ifdef FEAT_EVAL
  clear_string_option(&wop->wo_fde);
  clear_string_option(&wop->wo_fdt);
#endif
  clear_string_option(&wop->wo_fmr);
#endif
#ifdef FEAT_SIGNS
  clear_string_option(&wop->wo_scl);
#endif
#ifdef FEAT_LINEBREAK
  clear_string_option(&wop->wo_briopt);
#endif
  clear_string_option(&wop->wo_wcr);
#ifdef FEAT_RIGHTLEFT
  clear_string_option(&wop->wo_rlc);
#endif
#ifdef FEAT_TERMINAL
  clear_string_option(&wop->wo_twk);
  clear_string_option(&wop->wo_tws);
#endif
}

/*
 * Copy global option values to local options for one buffer.
 * Used when creating a new buffer and sometimes when entering a buffer.
 * flags:
 * BCO_ENTER	We will enter the buf buffer.
 * BCO_ALWAYS	Always copy the options, but only set b_p_initialized when
 *		appropriate.
 * BCO_NOHELP	Don't copy the values to a help buffer.
 */
void buf_copy_options(buf_T *buf, int flags)
{
  int should_copy = TRUE;
  char_u *save_p_isk = NULL; /* init for GCC */
  int dont_do_help;
  int did_isk = FALSE;

  /*
     * Skip this when the option defaults have not been set yet.  Happens when
     * main() allocates the first buffer.
     */
  if (p_cpo != NULL)
  {
    /*
	 * Always copy when entering and 'cpo' contains 'S'.
	 * Don't copy when already initialized.
	 * Don't copy when 'cpo' contains 's' and not entering.
	 * 'S'	BCO_ENTER  initialized	's'  should_copy
	 * yes	  yes	       X	 X	TRUE
	 * yes	  no	      yes	 X	FALSE
	 * no	   X	      yes	 X	FALSE
	 *  X	  no	      no	yes	FALSE
	 *  X	  no	      no	no	TRUE
	 * no	  yes	      no	 X	TRUE
	 */
    if ((vim_strchr(p_cpo, CPO_BUFOPTGLOB) == NULL || !(flags & BCO_ENTER)) && (buf->b_p_initialized || (!(flags & BCO_ENTER) && vim_strchr(p_cpo, CPO_BUFOPT) != NULL)))
      should_copy = FALSE;

    if (should_copy || (flags & BCO_ALWAYS))
    {
      /* Don't copy the options specific to a help buffer when
	     * BCO_NOHELP is given or the options were initialized already
	     * (jumping back to a help file with CTRL-T or CTRL-O) */
      dont_do_help = ((flags & BCO_NOHELP) && buf->b_help) || buf->b_p_initialized;
      if (dont_do_help) /* don't free b_p_isk */
      {
        save_p_isk = buf->b_p_isk;
        buf->b_p_isk = NULL;
      }
      /*
	     * Always free the allocated strings.  If not already initialized,
	     * reset 'readonly' and copy 'fileformat'.
	     */
      if (!buf->b_p_initialized)
      {
        free_buf_options(buf, TRUE);
        buf->b_p_ro = FALSE; /* don't copy readonly */
        buf->b_p_tx = p_tx;
        buf->b_p_fenc = vim_strsave(p_fenc);
        switch (*p_ffs)
        {
        case 'm':
          buf->b_p_ff = vim_strsave((char_u *)FF_MAC);
          break;
        case 'd':
          buf->b_p_ff = vim_strsave((char_u *)FF_DOS);
          break;
        case 'u':
          buf->b_p_ff = vim_strsave((char_u *)FF_UNIX);
          break;
        default:
          buf->b_p_ff = vim_strsave(p_ff);
        }
        if (buf->b_p_ff != NULL)
          buf->b_start_ffc = *buf->b_p_ff;
        buf->b_p_bh = empty_option;
        buf->b_p_bt = empty_option;
      }
      else
        free_buf_options(buf, FALSE);

      buf->b_p_ai = p_ai;
      buf->b_p_ai_nopaste = p_ai_nopaste;
      buf->b_p_sw = p_sw;
      buf->b_p_tw = p_tw;
      buf->b_p_tw_nopaste = p_tw_nopaste;
      buf->b_p_tw_nobin = p_tw_nobin;
      buf->b_p_wm = p_wm;
      buf->b_p_wm_nopaste = p_wm_nopaste;
      buf->b_p_wm_nobin = p_wm_nobin;
      buf->b_p_bin = p_bin;
      buf->b_p_bomb = p_bomb;
      buf->b_p_fixeol = p_fixeol;
      buf->b_p_et = p_et;
      buf->b_p_et_nobin = p_et_nobin;
      buf->b_p_et_nopaste = p_et_nopaste;
      buf->b_p_ml = p_ml;
      buf->b_p_ml_nobin = p_ml_nobin;
      buf->b_p_inf = p_inf;
      buf->b_p_swf = cmdmod.noswapfile ? FALSE : p_swf;
#ifdef FEAT_EVAL
      buf->b_p_tfu = vim_strsave(p_tfu);
#endif
      buf->b_p_sts = p_sts;
      buf->b_p_sts_nopaste = p_sts_nopaste;
#ifdef FEAT_VARTABS
      buf->b_p_vsts = vim_strsave(p_vsts);
      if (p_vsts && p_vsts != empty_option)
        tabstop_set(p_vsts, &buf->b_p_vsts_array);
      else
        buf->b_p_vsts_array = 0;
      buf->b_p_vsts_nopaste = p_vsts_nopaste
                                  ? vim_strsave(p_vsts_nopaste)
                                  : NULL;
#endif
      buf->b_p_sn = p_sn;
#ifdef FEAT_COMMENTS
      buf->b_p_com = vim_strsave(p_com);
#endif
#ifdef FEAT_FOLDING
      buf->b_p_cms = vim_strsave(p_cms);
#endif
      buf->b_p_fo = vim_strsave(p_fo);
      buf->b_p_flp = vim_strsave(p_flp);
      buf->b_p_nf = vim_strsave(p_nf);
      buf->b_p_mps = vim_strsave(p_mps);
#ifdef FEAT_SMARTINDENT
      buf->b_p_si = p_si;
#endif
      buf->b_p_ci = p_ci;
      /* Don't copy 'filetype', it must be detected */
      buf->b_p_ft = empty_option;
      buf->b_p_pi = p_pi;
#if defined(FEAT_SMARTINDENT)
      buf->b_p_cinw = vim_strsave(p_cinw);
#endif
      buf->b_p_fp = empty_option;
#if defined(FEAT_EVAL)
      buf->b_p_fex = vim_strsave(p_fex);
#endif
#ifdef FEAT_SEARCHPATH
      buf->b_p_sua = vim_strsave(p_sua);
#endif
#ifdef FEAT_KEYMAP
      buf->b_p_keymap = vim_strsave(p_keymap);
      buf->b_kmap_state |= KEYMAP_INIT;
#endif
#ifdef FEAT_TERMINAL
      buf->b_p_twsl = p_twsl;
#endif
      /* This isn't really an option, but copying the langmap and IME
	     * state from the current buffer is better than resetting it. */
      buf->b_p_iminsert = p_iminsert;
      buf->b_p_imsearch = p_imsearch;

      /* options that are normally global but also have a local value
	     * are not copied, start using the global value */
      buf->b_p_ar = -1;
      buf->b_p_ul = NO_LOCAL_UNDOLEVEL;
      buf->b_p_bkc = empty_option;
      buf->b_bkc_flags = 0;
#ifdef FEAT_QUICKFIX
      buf->b_p_gp = empty_option;
      buf->b_p_mp = empty_option;
      buf->b_p_efm = empty_option;
#endif
      buf->b_p_ep = empty_option;
      buf->b_p_kp = empty_option;
      buf->b_p_path = empty_option;
      buf->b_p_tags = empty_option;
      buf->b_p_tc = empty_option;
      buf->b_tc_flags = 0;
#ifdef FEAT_FIND_ID
      buf->b_p_def = empty_option;
      buf->b_p_inc = empty_option;
#ifdef FEAT_EVAL
      buf->b_p_inex = vim_strsave(p_inex);
#endif
#endif
#ifdef FEAT_TEXTOBJ
      buf->b_p_qe = vim_strsave(p_qe);
#endif
#if defined(FEAT_BEVAL) && defined(FEAT_EVAL)
      buf->b_p_bexpr = empty_option;
#endif
#ifdef FEAT_PERSISTENT_UNDO
      buf->b_p_udf = p_udf;
#endif
      buf->b_p_menc = empty_option;

      /*
	     * Don't copy the options set by ex_help(), use the saved values,
	     * when going from a help buffer to a non-help buffer.
	     * Don't touch these at all when BCO_NOHELP is used and going from
	     * or to a help buffer.
	     */
      if (dont_do_help)
      {
        buf->b_p_isk = save_p_isk;
#ifdef FEAT_VARTABS
        if (p_vts && p_vts != empty_option && !buf->b_p_vts_array)
          tabstop_set(p_vts, &buf->b_p_vts_array);
        else
          buf->b_p_vts_array = NULL;
#endif
      }
      else
      {
        buf->b_p_isk = vim_strsave(p_isk);
        did_isk = TRUE;
        buf->b_p_ts = p_ts;
#ifdef FEAT_VARTABS
        buf->b_p_vts = vim_strsave(p_vts);
        if (p_vts && p_vts != empty_option && !buf->b_p_vts_array)
          tabstop_set(p_vts, &buf->b_p_vts_array);
        else
          buf->b_p_vts_array = NULL;
#endif
        buf->b_help = FALSE;
        if (buf->b_p_bt[0] == 'h')
          clear_string_option(&buf->b_p_bt);
        buf->b_p_ma = p_ma;
      }
    }

    /*
	 * When the options should be copied (ignoring BCO_ALWAYS), set the
	 * flag that indicates that the options have been initialized.
	 */
    if (should_copy)
      buf->b_p_initialized = TRUE;
  }

  check_buf_options(buf); /* make sure we don't have NULLs */
  if (did_isk)
    (void)buf_init_chartab(buf, FALSE);
}

/*
 * Reset the 'modifiable' option and its default value.
 */
void reset_modifiable(void)
{
  int opt_idx;

  curbuf->b_p_ma = FALSE;
  p_ma = FALSE;
  opt_idx = findoption((char_u *)"ma");
  if (opt_idx >= 0)
    options[opt_idx].def_val[VI_DEFAULT] = FALSE;
}

/*
 * Set the global value for 'iminsert' to the local value.
 */
void set_iminsert_global(void)
{
  p_iminsert = curbuf->b_p_iminsert;
}

/*
 * Set the global value for 'imsearch' to the local value.
 */
void set_imsearch_global(void)
{
  p_imsearch = curbuf->b_p_imsearch;
}

#if defined(FEAT_CMDL_COMPL) || defined(PROTO)
static int expand_option_idx = -1;
static char_u expand_option_name[5] = {'t', '_', NUL, NUL, NUL};
static int expand_option_flags = 0;

void set_context_in_set_cmd(
    expand_T *xp,
    char_u *arg,
    int opt_flags) /* OPT_GLOBAL and/or OPT_LOCAL */
{
  int nextchar;
  long_u flags = 0; /* init for GCC */
  int opt_idx = 0;  /* init for GCC */
  char_u *p;
  char_u *s;
  int is_term_option = FALSE;
  int key;

  expand_option_flags = opt_flags;

  xp->xp_context = EXPAND_SETTINGS;
  if (*arg == NUL)
  {
    xp->xp_pattern = arg;
    return;
  }
  p = arg + STRLEN(arg) - 1;
  if (*p == ' ' && *(p - 1) != '\\')
  {
    xp->xp_pattern = p + 1;
    return;
  }
  while (p > arg)
  {
    s = p;
    /* count number of backslashes before ' ' or ',' */
    if (*p == ' ' || *p == ',')
    {
      while (s > arg && *(s - 1) == '\\')
        --s;
    }
    /* break at a space with an even number of backslashes */
    if (*p == ' ' && ((p - s) & 1) == 0)
    {
      ++p;
      break;
    }
    --p;
  }
  if (STRNCMP(p, "no", 2) == 0 && STRNCMP(p, "novice", 6) != 0)
  {
    xp->xp_context = EXPAND_BOOL_SETTINGS;
    p += 2;
  }
  if (STRNCMP(p, "inv", 3) == 0)
  {
    xp->xp_context = EXPAND_BOOL_SETTINGS;
    p += 3;
  }
  xp->xp_pattern = arg = p;
  if (*arg == '<')
  {
    while (*p != '>')
      if (*p++ == NUL) /* expand terminal option name */
        return;
    key = get_special_key_code(arg + 1);
    if (key == 0) /* unknown name */
    {
      xp->xp_context = EXPAND_NOTHING;
      return;
    }
    nextchar = *++p;
    is_term_option = TRUE;
    expand_option_name[2] = KEY2TERMCAP0(key);
    expand_option_name[3] = KEY2TERMCAP1(key);
  }
  else
  {
    if (p[0] == 't' && p[1] == '_')
    {
      p += 2;
      if (*p != NUL)
        ++p;
      if (*p == NUL)
        return; /* expand option name */
      nextchar = *++p;
      is_term_option = TRUE;
      expand_option_name[2] = p[-2];
      expand_option_name[3] = p[-1];
    }
    else
    {
      /* Allow * wildcard */
      while (ASCII_ISALNUM(*p) || *p == '_' || *p == '*')
        p++;
      if (*p == NUL)
        return;
      nextchar = *p;
      *p = NUL;
      opt_idx = findoption(arg);
      *p = nextchar;
      if (opt_idx == -1 || options[opt_idx].var == NULL)
      {
        xp->xp_context = EXPAND_NOTHING;
        return;
      }
      flags = options[opt_idx].flags;
      if (flags & P_BOOL)
      {
        xp->xp_context = EXPAND_NOTHING;
        return;
      }
    }
  }
  /* handle "-=" and "+=" */
  if ((nextchar == '-' || nextchar == '+' || nextchar == '^') && p[1] == '=')
  {
    ++p;
    nextchar = '=';
  }
  if ((nextchar != '=' && nextchar != ':') || xp->xp_context == EXPAND_BOOL_SETTINGS)
  {
    xp->xp_context = EXPAND_UNSUCCESSFUL;
    return;
  }
  if (xp->xp_context != EXPAND_BOOL_SETTINGS && p[1] == NUL)
  {
    xp->xp_context = EXPAND_OLD_SETTING;
    if (is_term_option)
      expand_option_idx = -1;
    else
      expand_option_idx = opt_idx;
    xp->xp_pattern = p + 1;
    return;
  }
  xp->xp_context = EXPAND_NOTHING;
  if (is_term_option || (flags & P_NUM))
    return;

  xp->xp_pattern = p + 1;

  if (flags & P_EXPAND)
  {
    p = options[opt_idx].var;
    if (p == (char_u *)&p_bdir || p == (char_u *)&p_dir || p == (char_u *)&p_path || p == (char_u *)&p_pp || p == (char_u *)&p_rtp
#ifdef FEAT_SEARCHPATH
        || p == (char_u *)&p_cdpath
#endif
#ifdef FEAT_SESSION
        || p == (char_u *)&p_vdir
#endif
    )
    {
      xp->xp_context = EXPAND_DIRECTORIES;
      if (p == (char_u *)&p_path
#ifdef FEAT_SEARCHPATH
          || p == (char_u *)&p_cdpath
#endif
      )
        xp->xp_backslash = XP_BS_THREE;
      else
        xp->xp_backslash = XP_BS_ONE;
    }
    else
    {
      xp->xp_context = EXPAND_FILES;
      /* for 'tags' need three backslashes for a space */
      if (p == (char_u *)&p_tags)
        xp->xp_backslash = XP_BS_THREE;
      else
        xp->xp_backslash = XP_BS_ONE;
    }
  }

  /* For an option that is a list of file names, find the start of the
     * last file name. */
  for (p = arg + STRLEN(arg) - 1; p > xp->xp_pattern; --p)
  {
    /* count number of backslashes before ' ' or ',' */
    if (*p == ' ' || *p == ',')
    {
      s = p;
      while (s > xp->xp_pattern && *(s - 1) == '\\')
        --s;
      if ((*p == ' ' && (xp->xp_backslash == XP_BS_THREE && (p - s) < 3)) || (*p == ',' && (flags & P_COMMA) && ((p - s) & 1) == 0))
      {
        xp->xp_pattern = p + 1;
        break;
      }
    }
  }

  return;
}

int ExpandSettings(
    expand_T *xp,
    regmatch_T *regmatch,
    int *num_file,
    char_u ***file)
{
  int num_normal = 0; /* Nr of matching non-term-code settings */
  int num_term = 0;   /* Nr of matching terminal code settings */
  int opt_idx;
  int match;
  int count = 0;
  char_u *str;
  int loop;
  int is_term_opt;
  char_u name_buf[MAX_KEY_NAME_LEN];
  static char *(names[]) = {"all", "termcap"};
  int ic = regmatch->rm_ic; /* remember the ignore-case flag */

  /* do this loop twice:
     * loop == 0: count the number of matching options
     * loop == 1: copy the matching options into allocated memory
     */
  for (loop = 0; loop <= 1; ++loop)
  {
    regmatch->rm_ic = ic;
    if (xp->xp_context != EXPAND_BOOL_SETTINGS)
    {
      for (match = 0; match < (int)(sizeof(names) / sizeof(char *));
           ++match)
        if (vim_regexec(regmatch, (char_u *)names[match], (colnr_T)0))
        {
          if (loop == 0)
            num_normal++;
          else
            (*file)[count++] = vim_strsave((char_u *)names[match]);
        }
    }
    for (opt_idx = 0; (str = (char_u *)options[opt_idx].fullname) != NULL;
         opt_idx++)
    {
      if (options[opt_idx].var == NULL)
        continue;
      if (xp->xp_context == EXPAND_BOOL_SETTINGS && !(options[opt_idx].flags & P_BOOL))
        continue;
      is_term_opt = istermoption(&options[opt_idx]);
      if (is_term_opt && num_normal > 0)
        continue;
      match = FALSE;
      if (vim_regexec(regmatch, str, (colnr_T)0) || (options[opt_idx].shortname != NULL && vim_regexec(regmatch,
                                                                                                       (char_u *)options[opt_idx].shortname, (colnr_T)0)))
        match = TRUE;
      else if (is_term_opt)
      {
        name_buf[0] = '<';
        name_buf[1] = 't';
        name_buf[2] = '_';
        name_buf[3] = str[2];
        name_buf[4] = str[3];
        name_buf[5] = '>';
        name_buf[6] = NUL;
        if (vim_regexec(regmatch, name_buf, (colnr_T)0))
        {
          match = TRUE;
          str = name_buf;
        }
      }
      if (match)
      {
        if (loop == 0)
        {
          if (is_term_opt)
            num_term++;
          else
            num_normal++;
        }
        else
          (*file)[count++] = vim_strsave(str);
      }
    }
    /*
	 * Check terminal key codes, these are not in the option table
	 */
    if (xp->xp_context != EXPAND_BOOL_SETTINGS && num_normal == 0)
    {
      for (opt_idx = 0; (str = get_termcode(opt_idx)) != NULL; opt_idx++)
      {
        if (!isprint(str[0]) || !isprint(str[1]))
          continue;

        name_buf[0] = 't';
        name_buf[1] = '_';
        name_buf[2] = str[0];
        name_buf[3] = str[1];
        name_buf[4] = NUL;

        match = FALSE;
        if (vim_regexec(regmatch, name_buf, (colnr_T)0))
          match = TRUE;
        else
        {
          name_buf[0] = '<';
          name_buf[1] = 't';
          name_buf[2] = '_';
          name_buf[3] = str[0];
          name_buf[4] = str[1];
          name_buf[5] = '>';
          name_buf[6] = NUL;

          if (vim_regexec(regmatch, name_buf, (colnr_T)0))
            match = TRUE;
        }
        if (match)
        {
          if (loop == 0)
            num_term++;
          else
            (*file)[count++] = vim_strsave(name_buf);
        }
      }

      /*
	     * Check special key names.
	     */
      regmatch->rm_ic = TRUE; /* ignore case here */
      for (opt_idx = 0; (str = get_key_name(opt_idx)) != NULL; opt_idx++)
      {
        name_buf[0] = '<';
        STRCPY(name_buf + 1, str);
        STRCAT(name_buf, ">");

        if (vim_regexec(regmatch, name_buf, (colnr_T)0))
        {
          if (loop == 0)
            num_term++;
          else
            (*file)[count++] = vim_strsave(name_buf);
        }
      }
    }
    if (loop == 0)
    {
      if (num_normal > 0)
        *num_file = num_normal;
      else if (num_term > 0)
        *num_file = num_term;
      else
        return OK;
      *file = ALLOC_MULT(char_u *, *num_file);
      if (*file == NULL)
      {
        *file = (char_u **)"";
        return FAIL;
      }
    }
  }
  return OK;
}

int ExpandOldSetting(int *num_file, char_u ***file)
{
  char_u *var = NULL; /* init for GCC */
  char_u *buf;

  *num_file = 0;
  *file = ALLOC_ONE(char_u *);
  if (*file == NULL)
    return FAIL;

  /*
     * For a terminal key code expand_option_idx is < 0.
     */
  if (expand_option_idx < 0)
  {
    var = find_termcode(expand_option_name + 2);
    if (var == NULL)
      expand_option_idx = findoption(expand_option_name);
  }

  if (expand_option_idx >= 0)
  {
    /* put string of option value in NameBuff */
    option_value2string(&options[expand_option_idx], expand_option_flags);
    var = NameBuff;
  }
  else if (var == NULL)
    var = (char_u *)"";

  /* A backslash is required before some characters.  This is the reverse of
     * what happens in do_set(). */
  buf = vim_strsave_escaped(var, escape_chars);

  if (buf == NULL)
  {
    VIM_CLEAR(*file);
    return FAIL;
  }

#ifdef BACKSLASH_IN_FILENAME
  /* For MS-Windows et al. we don't double backslashes at the start and
     * before a file name character. */
  for (var = buf; *var != NUL; MB_PTR_ADV(var))
    if (var[0] == '\\' && var[1] == '\\' && expand_option_idx >= 0 && (options[expand_option_idx].flags & P_EXPAND) && vim_isfilec(var[2]) && (var[2] != '\\' || (var == buf && var[4] != '\\')))
      STRMOVE(var, var + 1);
#endif

  *file[0] = buf;
  *num_file = 1;
  return OK;
}
#endif

/*
 * Get the value for the numeric or string option *opp in a nice format into
 * NameBuff[].  Must not be called with a hidden option!
 */
static void
option_value2string(
    struct vimoption *opp,
    int opt_flags) /* OPT_GLOBAL and/or OPT_LOCAL */
{
  char_u *varp;

  varp = get_varp_scope(opp, opt_flags);

  if (opp->flags & P_NUM)
  {
    long wc = 0;

    if (wc_use_keyname(varp, &wc))
      STRCPY(NameBuff, get_special_key_name((int)wc, 0));
    else if (wc != 0)
      STRCPY(NameBuff, transchar((int)wc));
    else
      sprintf((char *)NameBuff, "%ld", *(long *)varp);
  }
  else /* P_STRING */
  {
    varp = *(char_u **)(varp);
    if (varp == NULL) /* just in case */
      NameBuff[0] = NUL;
    else if (opp->flags & P_EXPAND)
      home_replace(NULL, varp, NameBuff, MAXPATHL, FALSE);
    /* Translate 'pastetoggle' into special key names */
    else if ((char_u **)opp->var == &p_pt)
      str2specialbuf(p_pt, NameBuff, MAXPATHL);
    else
      vim_strncpy(NameBuff, varp, MAXPATHL - 1);
  }
}

/*
 * Return TRUE if "varp" points to 'wildchar' or 'wildcharm' and it can be
 * printed as a keyname.
 * "*wcp" is set to the value of the option if it's 'wildchar' or 'wildcharm'.
 */
static int
wc_use_keyname(char_u *varp, long *wcp)
{
  if (((long *)varp == &p_wc) || ((long *)varp == &p_wcm))
  {
    *wcp = *(long *)varp;
    if (IS_SPECIAL(*wcp) || find_special_key_in_table((int)*wcp) >= 0)
      return TRUE;
  }
  return FALSE;
}

#if defined(FEAT_LANGMAP) || defined(PROTO)
/*
 * Any character has an equivalent 'langmap' character.  This is used for
 * keyboards that have a special language mode that sends characters above
 * 128 (although other characters can be translated too).  The "to" field is a
 * Vim command character.  This avoids having to switch the keyboard back to
 * ASCII mode when leaving Insert mode.
 *
 * langmap_mapchar[] maps any of 256 chars to an ASCII char used for Vim
 * commands.
 * langmap_mapga.ga_data is a sorted table of langmap_entry_T.  This does the
 * same as langmap_mapchar[] for characters >= 256.
 *
 * Use growarray for 'langmap' chars >= 256
 */
typedef struct
{
  int from;
  int to;
} langmap_entry_T;

static garray_T langmap_mapga;

/*
 * Search for an entry in "langmap_mapga" for "from".  If found set the "to"
 * field.  If not found insert a new entry at the appropriate location.
 */
static void
langmap_set_entry(int from, int to)
{
  langmap_entry_T *entries = (langmap_entry_T *)(langmap_mapga.ga_data);
  int a = 0;
  int b = langmap_mapga.ga_len;

  /* Do a binary search for an existing entry. */
  while (a != b)
  {
    int i = (a + b) / 2;
    int d = entries[i].from - from;

    if (d == 0)
    {
      entries[i].to = to;
      return;
    }
    if (d < 0)
      a = i + 1;
    else
      b = i;
  }

  if (ga_grow(&langmap_mapga, 1) != OK)
    return; /* out of memory */

  /* insert new entry at position "a" */
  entries = (langmap_entry_T *)(langmap_mapga.ga_data) + a;
  mch_memmove(entries + 1, entries,
              (langmap_mapga.ga_len - a) * sizeof(langmap_entry_T));
  ++langmap_mapga.ga_len;
  entries[0].from = from;
  entries[0].to = to;
}

/*
 * Apply 'langmap' to multi-byte character "c" and return the result.
 */
int langmap_adjust_mb(int c)
{
  langmap_entry_T *entries = (langmap_entry_T *)(langmap_mapga.ga_data);
  int a = 0;
  int b = langmap_mapga.ga_len;

  while (a != b)
  {
    int i = (a + b) / 2;
    int d = entries[i].from - c;

    if (d == 0)
      return entries[i].to; /* found matching entry */
    if (d < 0)
      a = i + 1;
    else
      b = i;
  }
  return c; /* no entry found, return "c" unmodified */
}

static void
langmap_init(void)
{
  int i;

  for (i = 0; i < 256; i++)
    langmap_mapchar[i] = i; /* we init with a one-to-one map */
  ga_init2(&langmap_mapga, sizeof(langmap_entry_T), 8);
}

/*
 * Called when langmap option is set; the language map can be
 * changed at any time!
 */
static void
langmap_set(void)
{
  char_u *p;
  char_u *p2;
  int from, to;

  ga_clear(&langmap_mapga); /* clear the previous map first */
  langmap_init();           /* back to one-to-one map */

  for (p = p_langmap; p[0] != NUL;)
  {
    for (p2 = p; p2[0] != NUL && p2[0] != ',' && p2[0] != ';';
         MB_PTR_ADV(p2))
    {
      if (p2[0] == '\\' && p2[1] != NUL)
        ++p2;
    }
    if (p2[0] == ';')
      ++p2; /* abcd;ABCD form, p2 points to A */
    else
      p2 = NULL; /* aAbBcCdD form, p2 is NULL */
    while (p[0])
    {
      if (p[0] == ',')
      {
        ++p;
        break;
      }
      if (p[0] == '\\' && p[1] != NUL)
        ++p;
      from = (*mb_ptr2char)(p);
      to = NUL;
      if (p2 == NULL)
      {
        MB_PTR_ADV(p);
        if (p[0] != ',')
        {
          if (p[0] == '\\')
            ++p;
          to = (*mb_ptr2char)(p);
        }
      }
      else
      {
        if (p2[0] != ',')
        {
          if (p2[0] == '\\')
            ++p2;
          to = (*mb_ptr2char)(p2);
        }
      }
      if (to == NUL)
      {
        semsg(_("E357: 'langmap': Matching character missing for %s"),
              transchar(from));
        return;
      }

      if (from >= 256)
        langmap_set_entry(from, to);
      else
        langmap_mapchar[from & 255] = to;

      /* Advance to next pair */
      MB_PTR_ADV(p);
      if (p2 != NULL)
      {
        MB_PTR_ADV(p2);
        if (*p == ';')
        {
          p = p2;
          if (p[0] != NUL)
          {
            if (p[0] != ',')
            {
              semsg(_("E358: 'langmap': Extra characters after semicolon: %s"), p);
              return;
            }
            ++p;
          }
          break;
        }
      }
    }
  }
}
#endif

/*
 * Return TRUE if format option 'x' is in effect.
 * Take care of no formatting when 'paste' is set.
 */
int has_format_option(int x)
{
  if (p_paste)
    return FALSE;
  return (vim_strchr(curbuf->b_p_fo, x) != NULL);
}

/*
 * Return TRUE if "x" is present in 'shortmess' option, or
 * 'shortmess' contains 'a' and "x" is present in SHM_A.
 */
int shortmess(int x)
{
  return p_shm != NULL &&
         (vim_strchr(p_shm, x) != NULL || (vim_strchr(p_shm, 'a') != NULL && vim_strchr((char_u *)SHM_A, x) != NULL));
}

/*
 * paste_option_changed() - Called after p_paste was set or reset.
 */
static void
paste_option_changed(void)
{
  static int old_p_paste = FALSE;
  static int save_sm = 0;
  static int save_sta = 0;
#ifdef FEAT_CMDL_INFO
  static int save_ru = 0;
#endif
#ifdef FEAT_RIGHTLEFT
  static int save_ri = 0;
  static int save_hkmap = 0;
#endif
  buf_T *buf;

  if (p_paste)
  {
    /*
	 * Paste switched from off to on.
	 * Save the current values, so they can be restored later.
	 */
    if (!old_p_paste)
    {
      /* save options for each buffer */
      FOR_ALL_BUFFERS(buf)
      {
        buf->b_p_tw_nopaste = buf->b_p_tw;
        buf->b_p_wm_nopaste = buf->b_p_wm;
        buf->b_p_sts_nopaste = buf->b_p_sts;
        buf->b_p_ai_nopaste = buf->b_p_ai;
        buf->b_p_et_nopaste = buf->b_p_et;
#ifdef FEAT_VARTABS
        if (buf->b_p_vsts_nopaste)
          vim_free(buf->b_p_vsts_nopaste);
        buf->b_p_vsts_nopaste = buf->b_p_vsts && buf->b_p_vsts != empty_option
                                    ? vim_strsave(buf->b_p_vsts)
                                    : NULL;
#endif
      }

      /* save global options */
      save_sm = p_sm;
      save_sta = p_sta;
#ifdef FEAT_CMDL_INFO
      save_ru = p_ru;
#endif
#ifdef FEAT_RIGHTLEFT
      save_ri = p_ri;
      save_hkmap = p_hkmap;
#endif
      /* save global values for local buffer options */
      p_ai_nopaste = p_ai;
      p_et_nopaste = p_et;
      p_sts_nopaste = p_sts;
      p_tw_nopaste = p_tw;
      p_wm_nopaste = p_wm;
#ifdef FEAT_VARTABS
      if (p_vsts_nopaste)
        vim_free(p_vsts_nopaste);
      p_vsts_nopaste = p_vsts && p_vsts != empty_option ? vim_strsave(p_vsts) : NULL;
#endif
    }

    /*
	 * Always set the option values, also when 'paste' is set when it is
	 * already on.
	 */
    /* set options for each buffer */
    FOR_ALL_BUFFERS(buf)
    {
      buf->b_p_tw = 0;  /* textwidth is 0 */
      buf->b_p_wm = 0;  /* wrapmargin is 0 */
      buf->b_p_sts = 0; /* softtabstop is 0 */
      buf->b_p_ai = 0;  /* no auto-indent */
      buf->b_p_et = 0;  /* no expandtab */
#ifdef FEAT_VARTABS
      if (buf->b_p_vsts)
        free_string_option(buf->b_p_vsts);
      buf->b_p_vsts = empty_option;
      if (buf->b_p_vsts_array)
        vim_free(buf->b_p_vsts_array);
      buf->b_p_vsts_array = 0;
#endif
    }

    /* set global options */
    p_sm = 0;  /* no showmatch */
    p_sta = 0; /* no smarttab */
#ifdef FEAT_CMDL_INFO
    if (p_ru)
      status_redraw_all(); /* redraw to remove the ruler */
    p_ru = 0;              /* no ruler */
#endif
#ifdef FEAT_RIGHTLEFT
    p_ri = 0;    /* no reverse insert */
    p_hkmap = 0; /* no Hebrew keyboard */
#endif
    /* set global values for local buffer options */
    p_tw = 0;
    p_wm = 0;
    p_sts = 0;
    p_ai = 0;
#ifdef FEAT_VARTABS
    if (p_vsts)
      free_string_option(p_vsts);
    p_vsts = empty_option;
#endif
  }

  /*
     * Paste switched from on to off: Restore saved values.
     */
  else if (old_p_paste)
  {
    /* restore options for each buffer */
    FOR_ALL_BUFFERS(buf)
    {
      buf->b_p_tw = buf->b_p_tw_nopaste;
      buf->b_p_wm = buf->b_p_wm_nopaste;
      buf->b_p_sts = buf->b_p_sts_nopaste;
      buf->b_p_ai = buf->b_p_ai_nopaste;
      buf->b_p_et = buf->b_p_et_nopaste;
#ifdef FEAT_VARTABS
      if (buf->b_p_vsts)
        free_string_option(buf->b_p_vsts);
      buf->b_p_vsts = buf->b_p_vsts_nopaste
                          ? vim_strsave(buf->b_p_vsts_nopaste)
                          : empty_option;
      if (buf->b_p_vsts_array)
        vim_free(buf->b_p_vsts_array);
      if (buf->b_p_vsts && buf->b_p_vsts != empty_option)
        tabstop_set(buf->b_p_vsts, &buf->b_p_vsts_array);
      else
        buf->b_p_vsts_array = 0;
#endif
    }

    /* restore global options */
    p_sm = save_sm;
    p_sta = save_sta;
#ifdef FEAT_CMDL_INFO
    if (p_ru != save_ru)
      status_redraw_all(); /* redraw to draw the ruler */
    p_ru = save_ru;
#endif
#ifdef FEAT_RIGHTLEFT
    p_ri = save_ri;
    p_hkmap = save_hkmap;
#endif
    /* set global values for local buffer options */
    p_ai = p_ai_nopaste;
    p_et = p_et_nopaste;
    p_sts = p_sts_nopaste;
    p_tw = p_tw_nopaste;
    p_wm = p_wm_nopaste;
#ifdef FEAT_VARTABS
    if (p_vsts)
      free_string_option(p_vsts);
    p_vsts = p_vsts_nopaste ? vim_strsave(p_vsts_nopaste) : empty_option;
#endif
  }

  old_p_paste = p_paste;
}

/*
 * vimrc_found() - Called when a ".vimrc" or "VIMINIT" has been found.
 *
 * Reset 'compatible' and set the values for options that didn't get set yet
 * to the Vim defaults.
 * Don't do this if the 'compatible' option has been set or reset before.
 * When "fname" is not NULL, use it to set $"envname" when it wasn't set yet.
 */
void vimrc_found(char_u *fname, char_u *envname)
{
  int opt_idx;
  int dofree = FALSE;
  char_u *p;

  if (!option_was_set((char_u *)"cp"))
  {
    p_cp = FALSE;
    for (opt_idx = 0; !istermoption(&options[opt_idx]); opt_idx++)
      if (!(options[opt_idx].flags & (P_WAS_SET | P_VI_DEF)))
        set_option_default(opt_idx, OPT_FREE, FALSE);
    didset_options();
    didset_options2();
  }

  if (fname != NULL)
  {
    p = vim_getenv(envname, &dofree);
    if (p == NULL)
    {
      /* Set $MYVIMRC to the first vimrc file found. */
      p = FullName_save(fname, FALSE);
      if (p != NULL)
      {
        vim_setenv(envname, p);
        vim_free(p);
      }
    }
    else if (dofree)
      vim_free(p);
  }
}

/*
 * Set 'compatible' on or off.  Called for "-C" and "-N" command line arg.
 */
void change_compatible(int on)
{
  int opt_idx;

  if (p_cp != on)
  {
    p_cp = on;
    compatible_set();
  }
  opt_idx = findoption((char_u *)"cp");
  if (opt_idx >= 0)
    options[opt_idx].flags |= P_WAS_SET;
}

/*
 * Return TRUE when option "name" has been set.
 * Only works correctly for global options.
 */
int option_was_set(char_u *name)
{
  int idx;

  idx = findoption(name);
  if (idx < 0) /* unknown option */
    return FALSE;
  if (options[idx].flags & P_WAS_SET)
    return TRUE;
  return FALSE;
}

/*
 * Reset the flag indicating option "name" was set.
 */
int reset_option_was_set(char_u *name)
{
  int idx = findoption(name);

  if (idx >= 0)
  {
    options[idx].flags &= ~P_WAS_SET;
    return OK;
  }
  return FAIL;
}

/*
 * compatible_set() - Called when 'compatible' has been set or unset.
 *
 * When 'compatible' set: Set all relevant options (those that have the P_VIM)
 * flag) to a Vi compatible value.
 * When 'compatible' is unset: Set all options that have a different default
 * for Vim (without the P_VI_DEF flag) to that default.
 */
static void
compatible_set(void)
{
  int opt_idx;

  for (opt_idx = 0; !istermoption(&options[opt_idx]); opt_idx++)
    if (((options[opt_idx].flags & P_VIM) && p_cp) || (!(options[opt_idx].flags & P_VI_DEF) && !p_cp))
      set_option_default(opt_idx, OPT_FREE, p_cp);
  didset_options();
  didset_options2();
}

#ifdef FEAT_LINEBREAK

/*
 * fill_breakat_flags() -- called when 'breakat' changes value.
 */
static void
fill_breakat_flags(void)
{
  char_u *p;
  int i;

  for (i = 0; i < 256; i++)
    breakat_flags[i] = FALSE;

  if (p_breakat != NULL)
    for (p = p_breakat; *p; p++)
      breakat_flags[*p] = TRUE;
}
#endif

/*
 * Check an option that can be a range of string values.
 *
 * Return OK for correct value, FAIL otherwise.
 * Empty is always OK.
 */
static int
check_opt_strings(
    char_u *val,
    char **values,
    int list) /* when TRUE: accept a list of values */
{
  return opt_strings_flags(val, values, NULL, list);
}

/*
 * Handle an option that can be a range of string values.
 * Set a flag in "*flagp" for each string present.
 *
 * Return OK for correct value, FAIL otherwise.
 * Empty is always OK.
 */
static int
opt_strings_flags(
    char_u *val,   /* new value */
    char **values, /* array of valid string values */
    unsigned *flagp,
    int list) /* when TRUE: accept a list of values */
{
  int i;
  int len;
  unsigned new_flags = 0;

  while (*val)
  {
    for (i = 0;; ++i)
    {
      if (values[i] == NULL) /* val not found in values[] */
        return FAIL;

      len = (int)STRLEN(values[i]);
      if (STRNCMP(values[i], val, len) == 0 && ((list && val[len] == ',') || val[len] == NUL))
      {
        val += len + (val[len] == ',');
        new_flags |= (1 << i);
        break; /* check next item in val list */
      }
    }
  }
  if (flagp != NULL)
    *flagp = new_flags;

  return OK;
}

/*
 * Read the 'wildmode' option, fill wim_flags[].
 */
static int
check_opt_wim(void)
{
  char_u new_wim_flags[4];
  char_u *p;
  int i;
  int idx = 0;

  for (i = 0; i < 4; ++i)
    new_wim_flags[i] = 0;

  for (p = p_wim; *p; ++p)
  {
    for (i = 0; ASCII_ISALPHA(p[i]); ++i)
      ;
    if (p[i] != NUL && p[i] != ',' && p[i] != ':')
      return FAIL;
    if (i == 7 && STRNCMP(p, "longest", 7) == 0)
      new_wim_flags[idx] |= WIM_LONGEST;
    else if (i == 4 && STRNCMP(p, "full", 4) == 0)
      new_wim_flags[idx] |= WIM_FULL;
    else if (i == 4 && STRNCMP(p, "list", 4) == 0)
      new_wim_flags[idx] |= WIM_LIST;
    else
      return FAIL;
    p += i;
    if (*p == NUL)
      break;
    if (*p == ',')
    {
      if (idx == 3)
        return FAIL;
      ++idx;
    }
  }

  /* fill remaining entries with last flag */
  while (idx < 3)
  {
    new_wim_flags[idx + 1] = new_wim_flags[idx];
    ++idx;
  }

  /* only when there are no errors, wim_flags[] is changed */
  for (i = 0; i < 4; ++i)
    wim_flags[i] = new_wim_flags[i];
  return OK;
}

/*
 * Check if backspacing over something is allowed.
 */
int can_bs(
    int what) /* BS_INDENT, BS_EOL or BS_START */
{
#ifdef FEAT_JOB_CHANNEL
  if (what == BS_START && bt_prompt(curbuf))
    return FALSE;
#endif
  switch (*p_bs)
  {
  case '2':
    return TRUE;
  case '1':
    return (what != BS_START);
  case '0':
    return FALSE;
  }
  return vim_strchr(p_bs, what) != NULL;
}

/*
 * Save the current values of 'fileformat' and 'fileencoding', so that we know
 * the file must be considered changed when the value is different.
 */
void save_file_ff(buf_T *buf)
{
  buf->b_start_ffc = *buf->b_p_ff;
  buf->b_start_eol = buf->b_p_eol;
  buf->b_start_bomb = buf->b_p_bomb;

  /* Only use free/alloc when necessary, they take time. */
  if (buf->b_start_fenc == NULL || STRCMP(buf->b_start_fenc, buf->b_p_fenc) != 0)
  {
    vim_free(buf->b_start_fenc);
    buf->b_start_fenc = vim_strsave(buf->b_p_fenc);
  }
}

/*
 * Return TRUE if 'fileformat' and/or 'fileencoding' has a different value
 * from when editing started (save_file_ff() called).
 * Also when 'endofline' was changed and 'binary' is set, or when 'bomb' was
 * changed and 'binary' is not set.
 * Also when 'endofline' was changed and 'fixeol' is not set.
 * When "ignore_empty" is true don't consider a new, empty buffer to be
 * changed.
 */
int file_ff_differs(buf_T *buf, int ignore_empty)
{
  /* In a buffer that was never loaded the options are not valid. */
  if (buf->b_flags & BF_NEVERLOADED)
    return FALSE;
  if (ignore_empty && (buf->b_flags & BF_NEW) && buf->b_ml.ml_line_count == 1 && *ml_get_buf(buf, (linenr_T)1, FALSE) == NUL)
    return FALSE;
  if (buf->b_start_ffc != *buf->b_p_ff)
    return TRUE;
  if ((buf->b_p_bin || !buf->b_p_fixeol) && buf->b_start_eol != buf->b_p_eol)
    return TRUE;
  if (!buf->b_p_bin && buf->b_start_bomb != buf->b_p_bomb)
    return TRUE;
  if (buf->b_start_fenc == NULL)
    return (*buf->b_p_fenc != NUL);
  return (STRCMP(buf->b_start_fenc, buf->b_p_fenc) != 0);
}

/*
 * return OK if "p" is a valid fileformat name, FAIL otherwise.
 */
int check_ff_value(char_u *p)
{
  return check_opt_strings(p, p_ff_values, FALSE);
}

#if defined(FEAT_VARTABS) || defined(PROTO)

/*
 * Set the integer values corresponding to the string setting of 'vartabstop'.
 * "array" will be set, caller must free it if needed.
 */
int tabstop_set(char_u *var, int **array)
{
  int valcount = 1;
  int t;
  char_u *cp;

  if (var[0] == NUL || (var[0] == '0' && var[1] == NUL))
  {
    *array = NULL;
    return TRUE;
  }

  for (cp = var; *cp != NUL; ++cp)
  {
    if (cp == var || cp[-1] == ',')
    {
      char_u *end;

      if (strtol((char *)cp, (char **)&end, 10) <= 0)
      {
        if (cp != end)
          emsg(_(e_positive));
        else
          emsg(_(e_invarg));
        return FALSE;
      }
    }

    if (VIM_ISDIGIT(*cp))
      continue;
    if (cp[0] == ',' && cp > var && cp[-1] != ',' && cp[1] != NUL)
    {
      ++valcount;
      continue;
    }
    emsg(_(e_invarg));
    return FALSE;
  }

  *array = ALLOC_MULT(int, valcount + 1);
  if (*array == NULL)
    return FALSE;
  (*array)[0] = valcount;

  t = 1;
  for (cp = var; *cp != NUL;)
  {
    (*array)[t++] = atoi((char *)cp);
    while (*cp != NUL && *cp != ',')
      ++cp;
    if (*cp != NUL)
      ++cp;
  }

  return TRUE;
}

/*
 * Calculate the number of screen spaces a tab will occupy.
 * If "vts" is set then the tab widths are taken from that array,
 * otherwise the value of ts is used.
 */
int tabstop_padding(colnr_T col, int ts_arg, int *vts)
{
  int ts = ts_arg == 0 ? 8 : ts_arg;
  int tabcount;
  colnr_T tabcol = 0;
  int t;
  int padding = 0;

  if (vts == NULL || vts[0] == 0)
    return ts - (col % ts);

  tabcount = vts[0];

  for (t = 1; t <= tabcount; ++t)
  {
    tabcol += vts[t];
    if (tabcol > col)
    {
      padding = (int)(tabcol - col);
      break;
    }
  }
  if (t > tabcount)
    padding = vts[tabcount] - (int)((col - tabcol) % vts[tabcount]);

  return padding;
}

/*
 * Find the size of the tab that covers a particular column.
 */
int tabstop_at(colnr_T col, int ts, int *vts)
{
  int tabcount;
  colnr_T tabcol = 0;
  int t;
  int tab_size = 0;

  if (vts == 0 || vts[0] == 0)
    return ts;

  tabcount = vts[0];
  for (t = 1; t <= tabcount; ++t)
  {
    tabcol += vts[t];
    if (tabcol > col)
    {
      tab_size = vts[t];
      break;
    }
  }
  if (t > tabcount)
    tab_size = vts[tabcount];

  return tab_size;
}

/*
 * Find the column on which a tab starts.
 */
colnr_T
tabstop_start(colnr_T col, int ts, int *vts)
{
  int tabcount;
  colnr_T tabcol = 0;
  int t;
  int excess;

  if (vts == NULL || vts[0] == 0)
    return (col / ts) * ts;

  tabcount = vts[0];
  for (t = 1; t <= tabcount; ++t)
  {
    tabcol += vts[t];
    if (tabcol > col)
      return tabcol - vts[t];
  }

  excess = tabcol % vts[tabcount];
  return excess + ((col - excess) / vts[tabcount]) * vts[tabcount];
}

/*
 * Find the number of tabs and spaces necessary to get from one column
 * to another.
 */
void tabstop_fromto(
    colnr_T start_col,
    colnr_T end_col,
    int ts_arg,
    int *vts,
    int *ntabs,
    int *nspcs)
{
  int spaces = end_col - start_col;
  colnr_T tabcol = 0;
  int padding = 0;
  int tabcount;
  int t;
  int ts = ts_arg == 0 ? curbuf->b_p_ts : ts_arg;

  if (vts == NULL || vts[0] == 0)
  {
    int tabs = 0;
    int initspc = 0;

    initspc = ts - (start_col % ts);
    if (spaces >= initspc)
    {
      spaces -= initspc;
      tabs++;
    }
    tabs += spaces / ts;
    spaces -= (spaces / ts) * ts;

    *ntabs = tabs;
    *nspcs = spaces;
    return;
  }

  /* Find the padding needed to reach the next tabstop. */
  tabcount = vts[0];
  for (t = 1; t <= tabcount; ++t)
  {
    tabcol += vts[t];
    if (tabcol > start_col)
    {
      padding = (int)(tabcol - start_col);
      break;
    }
  }
  if (t > tabcount)
    padding = vts[tabcount] - (int)((start_col - tabcol) % vts[tabcount]);

  /* If the space needed is less than the padding no tabs can be used. */
  if (spaces < padding)
  {
    *ntabs = 0;
    *nspcs = spaces;
    return;
  }

  *ntabs = 1;
  spaces -= padding;

  /* At least one tab has been used. See if any more will fit. */
  while (spaces != 0 && ++t <= tabcount)
  {
    padding = vts[t];
    if (spaces < padding)
    {
      *nspcs = spaces;
      return;
    }
    ++*ntabs;
    spaces -= padding;
  }

  *ntabs += spaces / vts[tabcount];
  *nspcs = spaces % vts[tabcount];
}

/*
 * See if two tabstop arrays contain the same values.
 */
int tabstop_eq(int *ts1, int *ts2)
{
  int t;

  if ((ts1 == 0 && ts2) || (ts1 && ts2 == 0))
    return FALSE;
  if (ts1 == ts2)
    return TRUE;
  if (ts1[0] != ts2[0])
    return FALSE;

  for (t = 1; t <= ts1[0]; ++t)
    if (ts1[t] != ts2[t])
      return FALSE;

  return TRUE;
}

#if defined(FEAT_BEVAL) || defined(PROTO)
/*
 * Copy a tabstop array, allocating space for the new array.
 */
int *tabstop_copy(int *oldts)
{
  int *newts;
  int t;

  if (oldts == NULL)
    return NULL;
  newts = ALLOC_MULT(int, oldts[0] + 1);
  if (newts != NULL)
    for (t = 0; t <= oldts[0]; ++t)
      newts[t] = oldts[t];
  return newts;
}
#endif

/*
 * Return a count of the number of tabstops.
 */
int tabstop_count(int *ts)
{
  return ts != NULL ? ts[0] : 0;
}

/*
 * Return the first tabstop, or 8 if there are no tabstops defined.
 */
int tabstop_first(int *ts)
{
  return ts != NULL ? ts[1] : 8;
}

#endif

/*
 * Return the effective shiftwidth value for current buffer, using the
 * 'tabstop' value when 'shiftwidth' is zero.
 */
long get_sw_value(buf_T *buf)
{
  return get_sw_value_col(buf, 0);
}

/*
 * Idem, using the first non-black in the current line.
 */
long get_sw_value_indent(buf_T *buf)
{
  pos_T pos = curwin->w_cursor;

  pos.col = getwhitecols_curline();
  return get_sw_value_pos(buf, &pos);
}

/*
 * Idem, using "pos".
 */
long get_sw_value_pos(buf_T *buf, pos_T *pos)
{
  pos_T save_cursor = curwin->w_cursor;
  long sw_value;

  curwin->w_cursor = *pos;
  sw_value = get_sw_value_col(buf, get_nolist_virtcol());
  curwin->w_cursor = save_cursor;
  return sw_value;
}

/*
 * Idem, using virtual column "col".
 */
long get_sw_value_col(buf_T *buf, colnr_T col UNUSED)
{
  return buf->b_p_sw ? buf->b_p_sw :
#ifdef FEAT_VARTABS
                     tabstop_at(col, buf->b_p_ts, buf->b_p_vts_array);
#else
                     buf->b_p_ts;
#endif
}

/*
 * Return the effective softtabstop value for the current buffer, using the
 * 'shiftwidth' value when 'softtabstop' is negative.
 */
long get_sts_value(void)
{
  return curbuf->b_p_sts < 0 ? get_sw_value(curbuf) : curbuf->b_p_sts;
}

/*
 * Return the effective 'scrolloff' value for the current window, using the
 * global value when appropriate.
 */
long get_scrolloff_value(void)
{
  return curwin->w_p_so < 0 ? p_so : curwin->w_p_so;
}

/*
 * Return the effective 'sidescrolloff' value for the current window, using the
 * global value when appropriate.
 */
long get_sidescrolloff_value(void)
{
  return curwin->w_p_siso < 0 ? p_siso : curwin->w_p_siso;
}

/*
 * Check matchpairs option for "*initc".
 * If there is a match set "*initc" to the matching character and "*findc" to
 * the opposite character.  Set "*backwards" to the direction.
 * When "switchit" is TRUE swap the direction.
 */
void find_mps_values(
    int *initc,
    int *findc,
    int *backwards,
    int switchit)
{
  char_u *ptr;

  ptr = curbuf->b_p_mps;
  while (*ptr != NUL)
  {
    if (has_mbyte)
    {
      char_u *prev;

      if (mb_ptr2char(ptr) == *initc)
      {
        if (switchit)
        {
          *findc = *initc;
          *initc = mb_ptr2char(ptr + mb_ptr2len(ptr) + 1);
          *backwards = TRUE;
        }
        else
        {
          *findc = mb_ptr2char(ptr + mb_ptr2len(ptr) + 1);
          *backwards = FALSE;
        }
        return;
      }
      prev = ptr;
      ptr += mb_ptr2len(ptr) + 1;
      if (mb_ptr2char(ptr) == *initc)
      {
        if (switchit)
        {
          *findc = *initc;
          *initc = mb_ptr2char(prev);
          *backwards = FALSE;
        }
        else
        {
          *findc = mb_ptr2char(prev);
          *backwards = TRUE;
        }
        return;
      }
      ptr += mb_ptr2len(ptr);
    }
    else
    {
      if (*ptr == *initc)
      {
        if (switchit)
        {
          *backwards = TRUE;
          *findc = *initc;
          *initc = ptr[2];
        }
        else
        {
          *backwards = FALSE;
          *findc = ptr[2];
        }
        return;
      }
      ptr += 2;
      if (*ptr == *initc)
      {
        if (switchit)
        {
          *backwards = FALSE;
          *findc = *initc;
          *initc = ptr[-2];
        }
        else
        {
          *backwards = TRUE;
          *findc = ptr[-2];
        }
        return;
      }
      ++ptr;
    }
    if (*ptr == ',')
      ++ptr;
  }
}

#if defined(FEAT_LINEBREAK) || defined(PROTO)
/*
 * This is called when 'breakindentopt' is changed and when a window is
 * initialized.
 */
static int
briopt_check(win_T *wp)
{
  char_u *p;
  int bri_shift = 0;
  long bri_min = 20;
  int bri_sbr = FALSE;

  p = wp->w_p_briopt;
  while (*p != NUL)
  {
    if (STRNCMP(p, "shift:", 6) == 0 && ((p[6] == '-' && VIM_ISDIGIT(p[7])) || VIM_ISDIGIT(p[6])))
    {
      p += 6;
      bri_shift = getdigits(&p);
    }
    else if (STRNCMP(p, "min:", 4) == 0 && VIM_ISDIGIT(p[4]))
    {
      p += 4;
      bri_min = getdigits(&p);
    }
    else if (STRNCMP(p, "sbr", 3) == 0)
    {
      p += 3;
      bri_sbr = TRUE;
    }
    if (*p != ',' && *p != NUL)
      return FAIL;
    if (*p == ',')
      ++p;
  }

  wp->w_p_brishift = bri_shift;
  wp->w_p_brimin = bri_min;
  wp->w_p_brisbr = bri_sbr;

  return OK;
}
#endif

/*
 * Get the local or global value of 'backupcopy'.
 */
unsigned int
get_bkc_value(buf_T *buf)
{
  return buf->b_bkc_flags ? buf->b_bkc_flags : bkc_flags;
}

#if defined(FEAT_SIGNS) || defined(PROTO)
/*
 * Return TRUE when window "wp" has a column to draw signs in.
 */
int signcolumn_on(win_T *wp)
{
  if (*wp->w_p_scl == 'n')
    return FALSE;
  if (*wp->w_p_scl == 'y')
    return TRUE;
  return (wp->w_buffer->b_signlist != NULL);
}
#endif

#if defined(FEAT_EVAL) || defined(PROTO)
/*
 * Get window or buffer local options.
 */
dict_T *
get_winbuf_options(int bufopt)
{
  dict_T *d;
  int opt_idx;

  d = dict_alloc();
  if (d == NULL)
    return NULL;

  for (opt_idx = 0; !istermoption(&options[opt_idx]); opt_idx++)
  {
    struct vimoption *opt = &options[opt_idx];

    if ((bufopt && (opt->indir & PV_BUF)) || (!bufopt && (opt->indir & PV_WIN)))
    {
      char_u *varp = get_varp(opt);

      if (varp != NULL)
      {
        if (opt->flags & P_STRING)
          dict_add_string(d, opt->fullname, *(char_u **)varp);
        else if (opt->flags & P_NUM)
          dict_add_number(d, opt->fullname, *(long *)varp);
        else
          dict_add_number(d, opt->fullname, *(int *)varp);
      }
    }
  }

  return d;
}
#endif
