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/*
* Copyright (c) 2003 Tama Communications Corporation
*
* This file is part of GNU GLOBAL.
*
* GNU GLOBAL 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; either version 2, or (at your option)
* any later version.
*
* GNU GLOBAL 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.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "char.h"
#include "strbuf.h"
static char regexchar[256];
static int init;
#define ISREGEXCHAR(c) (regexchar[(unsigned char)(c)])
/* initialize for isregex() */
static void
initialize(void)
{
regexchar['^'] = regexchar['$'] = regexchar['{'] =
regexchar['}'] = regexchar['('] = regexchar[')'] =
regexchar['.'] = regexchar['*'] = regexchar['+'] =
regexchar['['] = regexchar[']'] = regexchar['?'] =
regexchar['\\'] = init = 1;
}
/*
* isregexchar: test whether or not regular expression char.
*
* i) c char
* r) 1: is regex, 0: not regex
*/
int
isregexchar(c)
int c;
{
if (!init)
initialize();
return ISREGEXCHAR(c);
}
/*
* isregex: test whether or not regular expression
*
* i) s string
* r) 1: is regex, 0: not regex
*/
int
isregex(s)
const char *s;
{
int c;
if (!init)
initialize();
while ((c = *s++) != '\0')
if (ISREGEXCHAR(c))
return 1;
return 0;
}
/*
* quote string.
*
* 'aaa' => \'\a\a\a\'
*/
const char *
quote_string(s)
const char *s;
{
STATIC_STRBUF(sb);
strbuf_clear(sb);
for (; *s; s++) {
strbuf_putc(sb, '\\');
strbuf_putc(sb, *s);
}
return strbuf_value(sb);
}
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