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/* rpmatch - determine whether string value is affirmation or negative
response according to current locale's data
Copyright (C) 1996 Free Software Foundation, Inc.
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; either version 2, or (at your option)
any later version.
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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#if STDC_HEADERS || _LIBC
# include <stdlib.h>
#endif
#include <regex.h>
#ifndef _
# define _(String) String
#endif
static int
try (response, pattern, match, nomatch, lastp, re)
const char *response;
const char *pattern;
const int match;
const int nomatch;
const char **lastp;
regex_t *re;
{
if (pattern != *lastp)
{
/* The pattern has changed. */
if (*lastp)
{
/* Free the old compiled pattern. */
regfree (re);
*lastp = NULL;
}
/* Compile the pattern and cache it for future runs. */
if (regcomp (re, pattern, REG_EXTENDED) != 0)
return -1;
*lastp = pattern;
}
/* See if the regular expression matches RESPONSE. */
return regexec (re, response, 0, NULL, 0) == 0 ? match : nomatch;
}
int
rpmatch (response)
const char *response;
{
/* Match against one of the response patterns, compiling the pattern
first if necessary. */
/* We cache the response patterns and compiled regexps here. */
static const char *yesexpr, *noexpr;
static regex_t yesre, nore;
int result;
return ((result = try (response, _("^[yY][[:alpha:]]*"), 1, 0,
&yesexpr, &yesre))
? result
: try (response, _("^[nN][[:alpha:]]*"), 0, -1, &noexpr, &nore));
}
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