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/*
* Copyright 2024 Vsevolod Stakhov
*
* 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.
*/
#ifndef SRC_LIBUTIL_MULTIPATTERN_H_
#define SRC_LIBUTIL_MULTIPATTERN_H_
#include "config.h"
/**
* @file multipattern.h
*
* This file defines structure that acts like a transparent bridge between
* hyperscan and ac-trie
*/
#ifdef __cplusplus
extern "C" {
#endif
enum rspamd_multipattern_flags {
RSPAMD_MULTIPATTERN_DEFAULT = 0,
RSPAMD_MULTIPATTERN_ICASE = (1 << 0),
RSPAMD_MULTIPATTERN_UTF8 = (1 << 1),
RSPAMD_MULTIPATTERN_TLD = (1 << 2),
/* Not supported by acism */
RSPAMD_MULTIPATTERN_GLOB = (1 << 3),
RSPAMD_MULTIPATTERN_RE = (1 << 4),
RSPAMD_MULTIPATTERN_DOTALL = (1 << 5),
RSPAMD_MULTIPATTERN_SINGLEMATCH = (1 << 6),
RSPAMD_MULTIPATTERN_NO_START = (1 << 7),
};
struct rspamd_multipattern;
struct rspamd_cryptobox_library_ctx;
/**
* Called on pattern match
* @param mp multipattern structure
* @param strnum number of pattern matched
* @param textpos position in the text
* @param text input text
* @param len length of input text
* @param context userdata
* @return if 0 then search for another pattern, otherwise return this value to caller
*/
typedef int (*rspamd_multipattern_cb_t)(struct rspamd_multipattern *mp,
unsigned int strnum,
int match_start,
int match_pos,
const char *text,
gsize len,
void *context);
/**
* Init multipart library and set the appropriate cache dir
* @param cache_dir
*/
void rspamd_multipattern_library_init(const char *cache_dir);
/**
* Creates empty multipattern structure
* @param flags
* @return
*/
struct rspamd_multipattern *rspamd_multipattern_create(
enum rspamd_multipattern_flags flags);
/**
* Creates multipattern with preallocated number of patterns to speed up loading
* @param flags
* @param reserved
* @return
*/
struct rspamd_multipattern *rspamd_multipattern_create_sized(unsigned int reserved,
enum rspamd_multipattern_flags flags);
/**
* Creates new multipattern structure
* @param patterns vector of null terminated strings
* @param npatterns number of patterns
* @param flags flags applied to all patterns
* @return new multipattern structure
*/
struct rspamd_multipattern *rspamd_multipattern_create_full(
const char **patterns,
unsigned int npatterns,
enum rspamd_multipattern_flags flags);
/**
* Adds new pattern to match engine from zero-terminated string
* @param mp
* @param pattern
*/
void rspamd_multipattern_add_pattern(struct rspamd_multipattern *mp,
const char *pattern, int flags);
/**
* Adds new pattern from arbitrary string
* @param mp
* @param pattern
* @param patlen
* @param flags
*/
void rspamd_multipattern_add_pattern_len(struct rspamd_multipattern *mp,
const char *pattern, gsize patlen, int flags);
#define RSPAMD_MULTIPATTERN_COMPILE_NO_FS (0x1u << 0u)
/**
* Compiles multipattern structure
* @param mp
* @return
*/
gboolean rspamd_multipattern_compile(struct rspamd_multipattern *mp,
int flags,
GError **err);
/**
* Lookups for patterns in a text using the specified callback function
* @param mp
* @param in
* @param len
* @param cb if callback returns non-zero, then search is terminated and that value is returned
* @param ud callback data
* @return
*/
int rspamd_multipattern_lookup(struct rspamd_multipattern *mp,
const char *in, gsize len, rspamd_multipattern_cb_t cb,
gpointer ud, unsigned int *pnfound);
/**
* Get pattern string from multipattern identified by index
* @param mp
* @param index
* @return
*/
const char *rspamd_multipattern_get_pattern(struct rspamd_multipattern *mp,
unsigned int index);
/**
* Returns number of patterns in a multipattern matcher
* @param mp
* @return
*/
unsigned int rspamd_multipattern_get_npatterns(struct rspamd_multipattern *mp);
/**
* Destroys multipattern structure
* @param mp
*/
void rspamd_multipattern_destroy(struct rspamd_multipattern *mp);
/**
* Returns TRUE if hyperscan is supported
* @return
*/
gboolean rspamd_multipattern_has_hyperscan(void);
#ifdef __cplusplus
}
#endif
#endif /* SRC_LIBUTIL_MULTIPATTERN_H_ */
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