/*
 Copyright (c) 2013, 2016, Oracle and/or its affiliates. All rights
 reserved.
 
 This program is free software; you can redistribute it and/or
 modify it under the terms of the GNU General Public License
 as published by the Free Software Foundation; version 2 of
 the License.
 
 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 GNU General Public License for more details.
 
 You should have received a copy of the GNU General Public License
 along with this program; if not, write to the Free Software
 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 02110-1301  USA
 */

#include <ctype.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>

#include <my_global.h>
#include <mysql.h>
#include <my_sys.h>

#include <NdbApi.hpp> 

#include "EncoderCharset.h"

/* C++ initializes this to zeros:
*/
EncoderCharset * csinfo_table[MY_CS_CTYPE_TABLE_SIZE];


inline bool colIsUtf16le(const NdbDictionary::Column *col) {
  return (strncmp("utf16le", col->getCharset()->csname, 7) == 0);
}

inline bool colIsUtf8(const NdbDictionary::Column *col) {
  return (strncmp("utf8", col->getCharset()->csname, 4) == 0);
}

inline bool colIsUnicode(const NdbDictionary::Column *col) {
  return (strncmp("utf", col->getCharset()->csname, 3) == 0);
}

inline bool colIsLatin1(const NdbDictionary::Column *col) {
  return (strncmp("latin1", col->getCharset()->csname, 6) == 0);
}

inline bool colIsAscii(const NdbDictionary::Column *col) {
  return (strncmp("ascii", col->getCharset()->csname, 5) == 0);
}

inline bool colIsMultibyte(const NdbDictionary::Column *col) { 
  return (col->getCharset()->mbminlen > 1);
}


EncoderCharset * createEncoderCharset(const NdbDictionary::Column *col) {
  EncoderCharset * csinfo = new EncoderCharset;
  
  csinfo->name = col->getCharset()->csname;
  csinfo->collationName = col->getCharset()->name;
  csinfo->minlen = (short) col->getCharset()->mbminlen;
  csinfo->maxlen = (short) col->getCharset()->mbmaxlen;
  csinfo->isMultibyte = colIsMultibyte(col);
  csinfo->isAscii = colIsAscii(col);
  csinfo->isUnicode = colIsUnicode(col);
  csinfo->isUtf8 = colIsUtf8(col);
  csinfo->isUtf16le = colIsUtf16le(col);

  return csinfo;
}


const EncoderCharset * getEncoderCharsetForColumn(const NdbDictionary::Column *col) {
  int csnum = col->getCharsetNumber();
  EncoderCharset *csinfo = csinfo_table[csnum];
  if(csinfo == 0) {
    csinfo = createEncoderCharset(col);
    csinfo_table[csnum] = csinfo;
  }
  return csinfo;
}