mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-01-31 11:37:35 +00:00
132 lines
3.3 KiB
C
132 lines
3.3 KiB
C
/*
|
|
* shmatch.c -- shell interface to posix regular expression matching.
|
|
*/
|
|
|
|
/* Copyright (C) 2003-2022 Free Software Foundation, Inc.
|
|
|
|
This file is part of GNU Bash, the Bourne Again SHell.
|
|
|
|
Bash 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 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
Bash 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 Bash. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
# include "config.h"
|
|
#endif
|
|
|
|
#if defined (HAVE_POSIX_REGEXP)
|
|
|
|
#ifdef HAVE_UNISTD_H
|
|
# include <unistd.h>
|
|
#endif
|
|
|
|
#include "bashansi.h"
|
|
|
|
#include <stdio.h>
|
|
#include <regex.h>
|
|
|
|
#include "shell.h"
|
|
#include "variables.h"
|
|
#include "externs.h"
|
|
|
|
extern int glob_ignore_case, match_ignore_case;
|
|
|
|
#if defined (ARRAY_VARS)
|
|
extern SHELL_VAR *builtin_find_indexed_array (char *, int);
|
|
#endif
|
|
|
|
int
|
|
sh_regmatch (string, pattern, flags)
|
|
const char *string;
|
|
const char *pattern;
|
|
int flags;
|
|
{
|
|
regex_t regex = { 0 };
|
|
regmatch_t *matches;
|
|
int rflags;
|
|
#if defined (ARRAY_VARS)
|
|
SHELL_VAR *rematch;
|
|
ARRAY *amatch;
|
|
int subexp_ind;
|
|
char *subexp_str;
|
|
int subexp_len;
|
|
#endif
|
|
int result;
|
|
|
|
#if defined (ARRAY_VARS)
|
|
rematch = (SHELL_VAR *)NULL;
|
|
#endif
|
|
|
|
rflags = REG_EXTENDED;
|
|
if (match_ignore_case)
|
|
rflags |= REG_ICASE;
|
|
#if !defined (ARRAY_VARS)
|
|
rflags |= REG_NOSUB;
|
|
#endif
|
|
|
|
if (regcomp (®ex, pattern, rflags))
|
|
return 2; /* flag for printing a warning here. */
|
|
|
|
#if defined (ARRAY_VARS)
|
|
matches = (regmatch_t *)malloc (sizeof (regmatch_t) * (regex.re_nsub + 1));
|
|
#else
|
|
matches = NULL;
|
|
#endif
|
|
|
|
/* man regexec: NULL PMATCH ignored if NMATCH == 0 */
|
|
if (regexec (®ex, string, matches ? regex.re_nsub + 1 : 0, matches, 0))
|
|
result = EXECUTION_FAILURE;
|
|
else
|
|
result = EXECUTION_SUCCESS; /* match */
|
|
|
|
#if defined (ARRAY_VARS)
|
|
subexp_len = strlen (string) + 10;
|
|
subexp_str = malloc (subexp_len + 1);
|
|
|
|
/* Store the parenthesized subexpressions in the array BASH_REMATCH.
|
|
Element 0 is the portion that matched the entire regexp. Element 1
|
|
is the part that matched the first subexpression, and so on. */
|
|
#if 1
|
|
unbind_global_variable_noref ("BASH_REMATCH");
|
|
rematch = make_new_array_variable ("BASH_REMATCH");
|
|
#else
|
|
/* TAG:bash-5.3 */
|
|
rematch = builtin_find_indexed_array ("BASH_REMATCH", 1);
|
|
#endif
|
|
amatch = rematch ? array_cell (rematch) : (ARRAY *)0;
|
|
|
|
if (matches && amatch && (flags & SHMAT_SUBEXP) && result == EXECUTION_SUCCESS && subexp_str)
|
|
{
|
|
for (subexp_ind = 0; subexp_ind <= regex.re_nsub; subexp_ind++)
|
|
{
|
|
memset (subexp_str, 0, subexp_len);
|
|
strncpy (subexp_str, string + matches[subexp_ind].rm_so,
|
|
matches[subexp_ind].rm_eo - matches[subexp_ind].rm_so);
|
|
array_insert (amatch, subexp_ind, subexp_str);
|
|
}
|
|
}
|
|
|
|
#if 0
|
|
VSETATTR (rematch, att_readonly);
|
|
#endif
|
|
|
|
free (subexp_str);
|
|
free (matches);
|
|
#endif /* ARRAY_VARS */
|
|
|
|
regfree (®ex);
|
|
|
|
return result;
|
|
}
|
|
|
|
#endif /* HAVE_POSIX_REGEXP */
|