lazy_re.c File Reference

Lazy RE. More...

#include <sys/types.h>
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "lazy_re.h"

Classes
struct	RegexCache
	Represents Regex cache. More...

Macros
#define	REGEX_ASSERT(condition, msg)   assert((condition) || !printf("REGEX_ERROR: %s\n", msg))
	Assert to check regex functions input parameters. More...

Functions
void	Regex_compile (regex_t *regex, const char *pattern, const int cflags)
	Compiles regex. More...
void	Regex_free (regex_t *regex)
	Frees memory allocated for regex. More...
bool	Regex_test (const char *pattern, const char *string)
	Test whether pattern presents in a string. More...
RegexMatch *	Regex_compiledSearch (regex_t *regex, const char *string, const int eflags)
	Search a first occurrence of a regex in a string. More...
RegexMatch *	Regex_search (const char *pattern, const char *string, const int eflags)
	Search first occurrence of a pattern in a string. More...
RegexMatch *	Regex_searchNext ()
	Performs next search from cache of the last successful one. More...

Detailed Description

Lazy RE.

It is based on POSIX regular expression:

http://www.regular-expressions.info/posix.html

Special characters: .[{}()\*+?|^$

Macro Definition Documentation

#define REGEX_ASSERT	(		condition,
			msg
	)		assert((condition) || !printf("REGEX_ERROR: %s\n", msg))

Assert to check regex functions input parameters.

Parameters

condition	Assert condition.
msg	Pointer to string with message.

Function Documentation

void Regex_compile	(	regex_t *	regex,
		const char *	pattern,
		const int	cflags
	)

Compiles regex.

Regex cflags reference http://www.gnu.org/software/libc/manual/html_node/Flags-for-POSIX-Regexps.html#Flags-for-POSIX-Regexps

Parameters

regex	Pointer to a struct with regex.
pattern	String containing regex.
cflags	Regex flags with which regex is created.

RegexMatch* Regex_compiledSearch	(	regex_t *	regex,
		const char *	string,
		const int	eflags
	)

Search a first occurrence of a regex in a string.

Regex eflags reference http://www.gnu.org/software/libc/manual/html_node/Matching-POSIX-Regexps.html#Matching-POSIX-Regexps

Parameters

regex	Regex which will be used to match.
string	String against which to perform match.
eflags	Regex flags with which to match.

Returns

Match with groups if pattern is found. 0 Otherwise.

void Regex_free

(

regex_t *

regex

)

Frees memory allocated for regex.

Parameters

regex

Regex struct.

RegexMatch* Regex_search	(	const char *	pattern,
		const char *	string,
		const int	eflags
	)

Search first occurrence of a pattern in a string.

Regex eflags reference http://www.gnu.org/software/libc/manual/html_node/Matching-POSIX-Regexps.html#Matching-POSIX-Regexps

Parameters

regex	Pattern which will be used to match.
string	String against which to perform match.
eflags	Regex flags with which to match.

Returns

Match with groups if pattern is found. 0 Otherwise.

RegexMatch* Regex_searchNext

(

)

Performs next search from cache of the last successful one.

Note

Make sure to call Regex_search before calling this one.

Returns

Match with groups if pattern is found. 0 Otherwise.

bool Regex_test	(	const char *	pattern,
		const char *	string
	)

Test whether pattern presents in a string.

Parameters

regex	Pattern which will be used to match.
string	String against which to perform match.

Return values

true	If pattern is found.
false	otherwise.