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/* libguestfs
* Copyright (C) 2010-2011 Red Hat 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 2 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
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <pcre.h>
#include "guestfs.h"
#include "guestfs-internal.h"
/* Match a regular expression which contains no captures. Returns
* true if it matches or false if it doesn't.
*/
int
guestfs___match (guestfs_h *g, const char *str, const pcre *re)
{
size_t len = strlen (str);
int vec[30], r;
r = pcre_exec (re, NULL, str, len, 0, 0, vec, sizeof vec / sizeof vec[0]);
if (r == PCRE_ERROR_NOMATCH)
return 0;
if (r != 1) {
/* Internal error -- should not happen. */
warning (g, "%s: %s: pcre_exec returned unexpected error code %d when matching against the string \"%s\"\n",
__FILE__, __func__, r, str);
return 0;
}
return 1;
}
/* Match a regular expression which contains exactly one capture. If
* the string matches, return the capture, otherwise return NULL. The
* caller must free the result.
*/
char *
guestfs___match1 (guestfs_h *g, const char *str, const pcre *re)
{
size_t len = strlen (str);
int vec[30], r;
r = pcre_exec (re, NULL, str, len, 0, 0, vec, sizeof vec / sizeof vec[0]);
if (r == PCRE_ERROR_NOMATCH)
return NULL;
if (r != 2) {
/* Internal error -- should not happen. */
warning (g, "%s: %s: internal error: pcre_exec returned unexpected error code %d when matching against the string \"%s\"",
__FILE__, __func__, r, str);
return NULL;
}
return safe_strndup (g, &str[vec[2]], vec[3]-vec[2]);
}
/* Match a regular expression which contains exactly two captures. */
int
guestfs___match2 (guestfs_h *g, const char *str, const pcre *re,
char **ret1, char **ret2)
{
size_t len = strlen (str);
int vec[30], r;
r = pcre_exec (re, NULL, str, len, 0, 0, vec, 30);
if (r == PCRE_ERROR_NOMATCH)
return 0;
if (r != 3) {
/* Internal error -- should not happen. */
warning (g, "%s: %s: internal error: pcre_exec returned unexpected error code %d when matching against the string \"%s\"",
__FILE__, __func__, r, str);
return 0;
}
*ret1 = safe_strndup (g, &str[vec[2]], vec[3]-vec[2]);
*ret2 = safe_strndup (g, &str[vec[4]], vec[5]-vec[4]);
return 1;
}
/* Match a regular expression which contains exactly three captures. */
int
guestfs___match3 (guestfs_h *g, const char *str, const pcre *re,
char **ret1, char **ret2, char **ret3)
{
size_t len = strlen (str);
int vec[30], r;
r = pcre_exec (re, NULL, str, len, 0, 0, vec, 30);
if (r == PCRE_ERROR_NOMATCH)
return 0;
if (r != 4) {
/* Internal error -- should not happen. */
warning (g, "%s: %s: internal error: pcre_exec returned unexpected error code %d when matching against the string \"%s\"",
__FILE__, __func__, r, str);
return 0;
}
*ret1 = safe_strndup (g, &str[vec[2]], vec[3]-vec[2]);
*ret2 = safe_strndup (g, &str[vec[4]], vec[5]-vec[4]);
*ret3 = safe_strndup (g, &str[vec[6]], vec[7]-vec[6]);
return 1;
}
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