2 * shmatch.c -- shell interface to posix regular expression matching.
5 /* Copyright (C) 2003 Free Software Foundation, Inc.
7 This file is part of GNU Bash, the Bourne Again SHell.
9 Bash is free software: you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation, either version 3 of the License, or
12 (at your option) any later version.
14 Bash is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with Bash. If not, see <http://www.gnu.org/licenses/>.
27 #if defined (HAVE_POSIX_REGEXP)
39 #include "variables.h"
42 extern int glob_ignore_case, match_ignore_case;
45 sh_regmatch (string, pattern, flags)
50 regex_t regex = { 0 };
53 #if defined (ARRAY_VARS)
62 #if defined (ARRAY_VARS)
63 rematch = (SHELL_VAR *)NULL;
66 rflags = REG_EXTENDED;
67 if (glob_ignore_case || match_ignore_case)
69 #if !defined (ARRAY_VARS)
73 if (regcomp (®ex, pattern, rflags))
74 return 2; /* flag for printing a warning here. */
76 #if defined (ARRAY_VARS)
77 matches = (regmatch_t *)malloc (sizeof (regmatch_t) * (regex.re_nsub + 1));
82 if (regexec (®ex, string, regex.re_nsub + 1, matches, 0))
83 result = EXECUTION_FAILURE;
85 result = EXECUTION_SUCCESS; /* match */
87 #if defined (ARRAY_VARS)
88 subexp_len = strlen (string) + 10;
89 subexp_str = malloc (subexp_len + 1);
91 /* Store the parenthesized subexpressions in the array BASH_REMATCH.
92 Element 0 is the portion that matched the entire regexp. Element 1
93 is the part that matched the first subexpression, and so on. */
94 unbind_variable ("BASH_REMATCH");
95 rematch = make_new_array_variable ("BASH_REMATCH");
96 amatch = array_cell (rematch);
98 if ((flags & SHMAT_SUBEXP) && result == EXECUTION_SUCCESS && subexp_str)
100 for (subexp_ind = 0; subexp_ind <= regex.re_nsub; subexp_ind++)
102 memset (subexp_str, 0, subexp_len);
103 strncpy (subexp_str, string + matches[subexp_ind].rm_so,
104 matches[subexp_ind].rm_eo - matches[subexp_ind].rm_so);
105 array_insert (amatch, subexp_ind, subexp_str);
109 VSETATTR (rematch, att_readonly);
113 #endif /* ARRAY_VARS */
120 #endif /* HAVE_POSIX_REGEXP */