ap_regex.h revision 9d129b55f5a43abf43865c6b0eb6dd19bc22aba8
/* Copyright 1999-2005 The Apache Software Foundation or its licensors, as
* applicable.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/* Derived from PCRE's pcreposix.h.
Copyright (c) 1997-2004 University of Cambridge
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*/
/**
* @file ap_regex.h
* @brief Apache Regex defines
*/
#ifndef AP_REGEX_H
#define AP_REGEX_H
#include "apr.h"
/* Allow for C++ users */
#ifdef __cplusplus
extern "C" {
#endif
/* Options for ap_regexec: */
#define AP_REG_ICASE 0x01 /** use a case-insensitive match */
#define AP_REG_NEWLINE 0x02 /** don't match newlines against '.' etc */
#define AP_REG_NOTBOL 0x04 /** ^ will not match against start-of-string */
#define AP_REG_NOTEOL 0x08 /** $ will not match against end-of-string */
#define AP_REG_EXTENDED (0) /** unused */
#define AP_REG_NOSUB (0) /** unused */
/* Error values: */
enum {
AP_REG_ASSERT = 1, /** internal error ? */
AP_REG_ESPACE, /** failed to get memory */
AP_REG_INVARG, /** invalid argument */
AP_REG_NOMATCH /** match failed */
};
/* The structure representing a compiled regular expression. */
typedef struct {
void *re_pcre;
apr_size_t re_nsub;
apr_size_t re_erroffset;
} ap_regex_t;
/* The structure in which a captured offset is returned. */
typedef struct {
int rm_so;
int rm_eo;
} ap_regmatch_t;
/* The functions */
/**
* Compile a regular expression.
* @param preg Returned compiled regex
* @param regex The regular expression string
* @param cflags Must be zero (currently).
* @return Zero on success or non-zero on error
*/
AP_DECLARE(int) ap_regcomp(ap_regex_t *preg, const char *regex, int cflags);
/**
* Match a NUL-terminated string against a pre-compiled regex.
* @param preg The pre-compiled regex
* @param string The string to match
* @param nmatch Provide information regarding the location of any matches
* @param pmatch Provide information regarding the location of any matches
* @param eflags Bitwise OR of any of AP_REG_* flags
* @return 0 for successful match, #REG_NOMATCH otherwise
*/
AP_DECLARE(int) ap_regexec(const ap_regex_t *preg, const char *string,
apr_size_t nmatch, ap_regmatch_t *pmatch, int eflags);
/**
* Return the error code returned by regcomp or regexec into error messages
* @param errcode the error code returned by regexec or regcomp
* @param preg The precompiled regex
* @param errbuf A buffer to store the error in
* @param errbuf_size The size of the buffer
*/
AP_DECLARE(apr_size_t) ap_regerror(int errcode, const ap_regex_t *preg,
char *errbuf, apr_size_t errbuf_size);
/** Destroy a pre-compiled regex.
* @param preg The pre-compiled regex to free.
*/
AP_DECLARE(void) ap_regfree(ap_regex_t *preg);
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif /* AP_REGEX_T */