60a9e1124b
Match multiple occurrence in Find Packet Bytes, both forwards and backwards. Also fix an issue highlighting wide strings properly reintroduced by commit c0885fe390f1fba32986806383dd38a437c7681f For backwards searching in string and binary searches, use the memrchr and backwards mempbrk implementations. For regex, use PCRE2_ANCHORED to transform the user's regex expression into one that is anchored at the start byte, and progressively search backwards. Fix #11269
70 lines
1.8 KiB
C
70 lines
1.8 KiB
C
/** @file
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#ifndef __WSUTIL_REGEX_H__
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#define __WSUTIL_REGEX_H__
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#include <wireshark.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct _ws_regex;
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typedef struct _ws_regex ws_regex_t;
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WS_DLL_PUBLIC ws_regex_t *
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ws_regex_compile(const char *patt, char **errmsg);
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#define WS_REGEX_CASELESS (1U << 0)
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/* By default UTF-8 is off. This option also prevents it from being
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* turned on using a pattern option. */
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#define WS_REGEX_NEVER_UTF (1U << 1)
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#define WS_REGEX_ANCHORED (1U << 2)
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WS_DLL_PUBLIC ws_regex_t *
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ws_regex_compile_ex(const char *patt, ssize_t size, char **errmsg, unsigned flags);
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/** Matches a null-terminated subject string. */
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WS_DLL_PUBLIC bool
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ws_regex_matches(const ws_regex_t *re, const char *subj);
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/** Matches a subject string length in 8 bit code units. */
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WS_DLL_PUBLIC bool
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ws_regex_matches_length(const ws_regex_t *re,
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const char *subj, ssize_t subj_length);
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/** Returns start and end position of the matched substring.
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*
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* @note Using a nonzero subj_offset produces different results than
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* passing a pointer to the later offset as subj when the pattern
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* begins with a lookbehind.
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*
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* pos_vect[0] is first codepoint in the matched substring.
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* pos_vect[1] is first codepoint past the matched substring.
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* pos_vect[1] - pos_vect[0] is the matched substring length.
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*
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*/
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WS_DLL_PUBLIC bool
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ws_regex_matches_pos(const ws_regex_t *re,
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const char *subj, ssize_t subj_length,
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size_t subj_offset, size_t pos_vect[2]);
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WS_DLL_PUBLIC void
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ws_regex_free(ws_regex_t *re);
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WS_DLL_PUBLIC const char *
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ws_regex_pattern(const ws_regex_t *re);
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#ifdef __cplusplus
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}
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#endif
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#endif /* __WSUTIL_REGEX_H__ */
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