158 lines
4.1 KiB
C
158 lines
4.1 KiB
C
/* Copyright (C) 2004 Andreas Volz and various contributors
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person ob-
|
|
* taining a copy of this software and associated documentation
|
|
* files (the "Software"), to deal in the Software without restric-
|
|
* tion, including without limitation the rights to use, copy, modi-
|
|
* fy, merge, publish, distribute, sublicense, and/or sell copies of
|
|
* the Software, and to permit persons to whom the Software is fur-
|
|
* nished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be
|
|
* included in all copies of the Software, its documentation and
|
|
* marketing & publicity materials, and acknowledgment shall be giv-
|
|
* en in the documentation, materials and software packages that
|
|
* this Software was used.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
|
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
|
|
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONIN-
|
|
* FRINGEMENT. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
|
|
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CON-
|
|
* TRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
|
|
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
|
|
*
|
|
* File: regex_func.c
|
|
* Created by: Andreas Volz <linux@brachttal.net>
|
|
*
|
|
*/
|
|
#include "regex_func.h"
|
|
|
|
/*
|
|
* Match string against the extended regular expression
|
|
* in pattern, treating errors as no match.
|
|
*
|
|
* return 0 for match, 1 for no match
|
|
*/
|
|
/* --> TODO: error handling regerror()! */
|
|
|
|
int regex_match (const char *string, char *pattern)
|
|
{
|
|
int status;
|
|
regex_t re;
|
|
|
|
status = regcomp (&re, pattern, REG_EXTENDED | REG_NOSUB);
|
|
|
|
if (status != 0)
|
|
{
|
|
return status;
|
|
}
|
|
|
|
status = regex_match2 (&re, string, pattern);
|
|
regfree (&re);
|
|
|
|
return status;
|
|
}
|
|
|
|
int regex_match2 (regex_t *re, const char *string, char *pattern)
|
|
{
|
|
int status;
|
|
|
|
status = regexec (re, string, (size_t) 0, NULL, 0);
|
|
|
|
return status;
|
|
}
|
|
|
|
int regex_sub (const char *string, char *pattern, struct substrings **ss_ptr,
|
|
int maxsub, int *numsub)
|
|
{
|
|
regex_t re;
|
|
int status;
|
|
char err_buf[1024];
|
|
|
|
status = regcomp (&re, pattern, REG_EXTENDED);
|
|
|
|
if (status != 0)
|
|
{
|
|
regerror (status, &re, err_buf, (size_t) 1024);
|
|
printf ("regex compile: %s\n", err_buf);
|
|
|
|
return status;
|
|
}
|
|
|
|
status = regex_sub2 (&re, string, pattern, ss_ptr, maxsub, numsub);
|
|
|
|
if (status != 0)
|
|
{
|
|
regerror (status, &re, err_buf, (size_t) 1024);
|
|
printf ("regex exec: %s\n", err_buf);
|
|
}
|
|
|
|
regfree (&re);
|
|
|
|
return status;
|
|
}
|
|
|
|
int regex_sub2 (regex_t *re, const char *string, char *pattern,
|
|
struct substrings **ss_ptr, int maxsub, int *numsub)
|
|
{
|
|
int status, i;
|
|
regmatch_t *submatch;
|
|
struct substrings *ss = NULL;
|
|
int string_len = strlen (string);
|
|
|
|
maxsub = maxsub + 1;
|
|
|
|
submatch = malloc (maxsub * sizeof (*submatch));
|
|
|
|
status = regexec (re, string, (size_t) maxsub, submatch, 0);
|
|
|
|
if (status == REG_NOMATCH)
|
|
{
|
|
free (submatch);
|
|
return status;
|
|
}
|
|
|
|
ss = malloc (maxsub * sizeof (*ss));
|
|
|
|
*ss_ptr = ss;
|
|
|
|
for (i = 0; i < maxsub ; i++)
|
|
{
|
|
if (submatch[i].rm_so == submatch[i].rm_eo && submatch[i].rm_eo == -1)
|
|
{
|
|
break;
|
|
}
|
|
|
|
ss[i].match = malloc (submatch[i].rm_eo - submatch[i].rm_so + 1);
|
|
strncpy (ss[i].match, string + submatch[i].rm_so,
|
|
submatch[i].rm_eo - submatch[i].rm_so);
|
|
if (ss[i].match[submatch[i].rm_eo - submatch[i].rm_so] != '\0')
|
|
{
|
|
ss[i].match[submatch[i].rm_eo - submatch[i].rm_so] = '\0';
|
|
}
|
|
|
|
|
|
ss[i].start = malloc (submatch[i].rm_so + 1);
|
|
strncpy (ss[i].start, string, submatch[i].rm_so);
|
|
if (ss[i].start[submatch[i].rm_so] != '\0')
|
|
{
|
|
ss[i].start[submatch[i].rm_so] = '\0';
|
|
}
|
|
|
|
ss[i].end = malloc (string_len - submatch[i].rm_eo + 1);
|
|
strncpy (ss[i].end, string + submatch[i].rm_eo,
|
|
string_len - submatch[i].rm_eo);
|
|
if (ss[i].end[string_len - submatch[i].rm_eo] != '\0')
|
|
{
|
|
ss[i].end[string_len - submatch[i].rm_eo] = '\0';
|
|
}
|
|
|
|
*numsub = i + 1;
|
|
}
|
|
|
|
free (submatch);
|
|
|
|
return status;
|
|
}
|