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/*
* simple_regex.h
*
* Simle regex library.
*
* Copyright (C) 2004,2005 Martin Schlemmer <azarah@nosferatu.za.org>
*
*
* This program 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 version 2 of the License.
*
* This program 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 this program; if not, write to the Free Software Foundation, Inc.,
* 675 Mass Ave, Cambridge, MA 02139, USA.
*
* $Header$
*/
#ifndef _SIMPLE_REGEX_H
#define _SIMPLE_REGEX_H
#define REGEX_NO_MATCH 0 /* We have no match */
#define REGEX_PARTIAL_MATCH 1 /* Some of the string matches the regex */
#define REGEX_FULL_MATCH 2 /* The whole string matches the regex */
/* Macro to fill in .data and .regex */
#define FILL_REGEX_DATA(_regex_data, _string, _regex) \
do { \
_regex_data.data = _string; \
_regex_data.regex = _regex; \
} while (0)
/* Fill in _regex_data with _data and _regex, on failure goto _error */
#define DO_REGEX(_regex_data, _data, _regex, _error) \
do { \
FILL_REGEX_DATA(_regex_data, _data, _regex); \
if (-1 == match(&_regex_data)) { \
DBG_MSG("Could not do regex match!\n"); \
goto _error; \
} \
} while (0)
/* Evaluate to true if we have some kind of match */
#define REGEX_MATCH(_regex_data) \
((REGEX_FULL_MATCH == _regex_data.match) \
|| (REGEX_PARTIAL_MATCH == _regex_data.match))
/* Same as above, but for use when _regex_data is a pointer */
#define REGEX_MATCH_P(_regex_data) \
((REGEX_FULL_MATCH == _regex_data->match) \
|| (REGEX_PARTIAL_MATCH == _regex_data->match))
typedef struct {
char *data; /* String to perform regex operation on */
char *regex; /* String containing regex to use */
int match; /* Will be set if there was a match. Check
* REGEX_*_MATCH above for possible values */
char *where; /* Pointer to where match starts in data */
size_t count; /* Count characters from data matched by regex */
size_t r_count; /* Count characters of regex used for match. This
* should normally be the lenght of regex, but might
* not be for some internal functions ... */
} regex_data_t;
/*
* Return:
*
* 0 - There was no error. If there was a match, regex_data->match
* - will be > 0 (this is the definitive check - if not true, the
* - other values of the struct may be bogus), regex_data->count
* - will be the amount of data that was matched (might be 0 for
* - some wildcards), and regex_data->r_count will be > 0.
*
* -1 - An error occured. Check errno for more info.
*
*/
int match(regex_data_t *regex_data);
#endif /* _SIMPLE_REGEX_H */
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