/* This file is part of the YAZ toolkit.
 * Copyright (C) Index Data
 * See the file LICENSE for details.
 */
/**
 * \file cqlstring.c
 * \brief Implements query stream reader that reads from a C string.
 */
#if HAVE_CONFIG_H
#include <config.h>
#endif

#include <yaz/cql.h>

struct cql_buf_info {
    const char *str;
    int off;
};

static int getbuf(void *vp)
{
    struct cql_buf_info *bi = (struct cql_buf_info *) vp;
    if (bi->str[bi->off] == 0)
        return 0;
    return bi->str[bi->off++];
}

static void ungetbuf(int b, void *vp)
{
    struct cql_buf_info *bi = (struct cql_buf_info *) vp;
    if (b)
        (bi->off--);
}

int cql_parser_string(CQL_parser cp, const char *str)
{
    struct cql_buf_info b;

    b.str = str;
    b.off = 0;

    return cql_parser_stream(cp, getbuf, ungetbuf, &b);
}

/*
 * Local variables:
 * c-basic-offset: 4
 * c-file-style: "Stroustrup"
 * indent-tabs-mode: nil
 * End:
 * vim: shiftwidth=4 tabstop=8 expandtab
 */