munre.c
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/* GNU Mailutils -- a suite of utilities for electronic mail
Copyright (C) 1999, 2000, 2001, 2002, 2003, 2006, 2007, 2010 Free
Software Foundation, Inc.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 3 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General
Public License along with this library; if not, write to the
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301 USA */
#if HAVE_CONFIG_H
# include <config.h>
#endif
#include <errno.h>
#include <stdlib.h>
#include <mailutils/error.h>
#include <mailutils/errno.h>
#include <regex.h>
static regex_t *re_prefix;
int
mu_unre_set_regex (const char *str, int caseflag, char **errp)
{
int rc;
int flags = REG_EXTENDED;
if (errp)
*errp = NULL;
if (!str)
str = "^re: *";
if (re_prefix)
regfree (re_prefix);
else
{
re_prefix = malloc (sizeof (*re_prefix));
if (!re_prefix)
return ENOMEM;
}
if (!caseflag)
flags |= REG_ICASE;
rc = regcomp (re_prefix, str, flags);
if (rc)
{
if (errp)
{
size_t s = regerror (rc, re_prefix, NULL, 0);
s++;
*errp = malloc (s);
if (*errp)
regerror (rc, re_prefix, *errp, s);
}
regfree (re_prefix);
free (re_prefix);
return MU_ERR_FAILURE;
}
return 0;
}
int
mu_unre_subject (const char *subject, const char **new_subject)
{
int rc;
regmatch_t rm;
if (!subject)
return EINVAL;
if (!re_prefix)
{
rc = mu_unre_set_regex (NULL, 0, NULL);
if (rc)
return rc;
}
rc = regexec (re_prefix, subject, 1, &rm, 0);
if (rc == 0 && rm.rm_eo != -1 && new_subject)
*new_subject = subject + rm.rm_eo;
return rc;
}