2 * Copyright (C) 2010-2011 Red Hat Inc.
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this library; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
29 #include "guestfs-internal.h"
33 /* Match a regular expression which contains no captures. Returns
34 * true if it matches or false if it doesn't.
37 guestfs___match (guestfs_h *g, const char *str, const pcre *re)
39 size_t len = strlen (str);
42 r = pcre_exec (re, NULL, str, len, 0, 0, vec, sizeof vec / sizeof vec[0]);
43 if (r == PCRE_ERROR_NOMATCH)
46 /* Internal error -- should not happen. */
47 warning (g, "%s: %s: pcre_exec returned unexpected error code %d when matching against the string \"%s\"\n",
48 __FILE__, __func__, r, str);
55 /* Match a regular expression which contains exactly one capture. If
56 * the string matches, return the capture, otherwise return NULL. The
57 * caller must free the result.
60 guestfs___match1 (guestfs_h *g, const char *str, const pcre *re)
62 size_t len = strlen (str);
65 r = pcre_exec (re, NULL, str, len, 0, 0, vec, sizeof vec / sizeof vec[0]);
66 if (r == PCRE_ERROR_NOMATCH)
69 /* Internal error -- should not happen. */
70 warning (g, "%s: %s: internal error: pcre_exec returned unexpected error code %d when matching against the string \"%s\"",
71 __FILE__, __func__, r, str);
75 return safe_strndup (g, &str[vec[2]], vec[3]-vec[2]);
78 /* Match a regular expression which contains exactly two captures. */
80 guestfs___match2 (guestfs_h *g, const char *str, const pcre *re,
81 char **ret1, char **ret2)
83 size_t len = strlen (str);
86 r = pcre_exec (re, NULL, str, len, 0, 0, vec, 30);
87 if (r == PCRE_ERROR_NOMATCH)
90 /* Internal error -- should not happen. */
91 warning (g, "%s: %s: internal error: pcre_exec returned unexpected error code %d when matching against the string \"%s\"",
92 __FILE__, __func__, r, str);
96 *ret1 = safe_strndup (g, &str[vec[2]], vec[3]-vec[2]);
97 *ret2 = safe_strndup (g, &str[vec[4]], vec[5]-vec[4]);
102 /* Match a regular expression which contains exactly three captures. */
104 guestfs___match3 (guestfs_h *g, const char *str, const pcre *re,
105 char **ret1, char **ret2, char **ret3)
107 size_t len = strlen (str);
110 r = pcre_exec (re, NULL, str, len, 0, 0, vec, 30);
111 if (r == PCRE_ERROR_NOMATCH)
114 /* Internal error -- should not happen. */
115 warning (g, "%s: %s: internal error: pcre_exec returned unexpected error code %d when matching against the string \"%s\"",
116 __FILE__, __func__, r, str);
120 *ret1 = safe_strndup (g, &str[vec[2]], vec[3]-vec[2]);
121 *ret2 = safe_strndup (g, &str[vec[4]], vec[5]-vec[4]);
122 *ret3 = safe_strndup (g, &str[vec[6]], vec[7]-vec[6]);
127 #endif /* HAVE_PCRE */