denyhosts/clamscan/libclamav/regex_pcre.h

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2022-10-22 18:41:00 +08:00
/*
* Support for PCRE regex variant
*
* Copyright (C) 2013-2022 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
* Copyright (C) 2007-2013 Sourcefire, Inc.
*
* Authors: Kevin Lin
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* 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., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*/
#ifndef _REGEX_PCRE_H_
#define _REGEX_PCRE_H_
#if HAVE_CONFIG_H
#include "clamav-config.h"
#endif
#if HAVE_PCRE
#if USING_PCRE2
#define PCRE2_CODE_UNIT_WIDTH 8
#include <pcre2.h>
#else
#include <pcre.h>
#endif
#include "clamav-types.h"
#include "mpool.h"
/* used for setting overrides */
#define CLI_PCREMATCH_NOOFFSETOVERRIDE -1
/* must be multiple of 3 */
#define OVECCOUNT 300
#if USING_PCRE2
struct cli_pcre_data {
pcre2_code *re; /* compiled pcre regex */
pcre2_match_context *mctx; /* match context */
int options; /* pcre options */
char *expression; /* copied regular expression */
uint32_t search_offset; /* start offset to search at for pcre_exec */
};
struct cli_pcre_results {
int err;
uint32_t match[2]; /* populated by cli_pcre_match to be start (0) and end (1) offset of match */
pcre2_match_data *match_data;
};
#else
struct cli_pcre_data {
pcre *re; /* compiled pcre regex */
pcre_extra *ex; /* pcre extra data - limits */
int options; /* pcre options */
char *expression; /* copied regular expression */
uint32_t search_offset; /* start offset to search at for pcre_exec */
};
struct cli_pcre_results {
int err;
uint32_t match[2]; /* populated by cli_pcre_match to be start (0) and end (1) offset of match */
int ovector[OVECCOUNT];
};
#endif
cl_error_t cli_pcre_init_internal();
cl_error_t cli_pcre_addoptions(struct cli_pcre_data *pd, const char **opt, int errout);
cl_error_t cli_pcre_compile(struct cli_pcre_data *pd, long long unsigned match_limit, long long unsigned match_limit_recursion, unsigned int options, int opt_override);
int cli_pcre_match(struct cli_pcre_data *pd, const unsigned char *buffer, size_t buflen, size_t override_offset, int options, struct cli_pcre_results *results);
void cli_pcre_report(const struct cli_pcre_data *pd, const unsigned char *buffer, size_t buflen, int rc, struct cli_pcre_results *results);
cl_error_t cli_pcre_results_reset(struct cli_pcre_results *results, const struct cli_pcre_data *pd);
void cli_pcre_results_free(struct cli_pcre_results *results);
void cli_pcre_free_single(struct cli_pcre_data *pd);
#endif /* HAVE_PCRE */
#endif /*_REGEX_PCRE_H_*/