ws_mempbrk.h File Reference

#include <wireshark.h>

Go to the source code of this file.

Classes
struct	ws_mempbrk_pattern

Functions
WS_DLL_PUBLIC void	ws_mempbrk_compile (ws_mempbrk_pattern *pattern, const char *needles)
	Compile the pattern for the needles to find using ws_mempbrk_exec().
WS_DLL_PUBLIC const uint8_t *	ws_mempbrk_exec (const uint8_t *haystack, size_t haystacklen, const ws_mempbrk_pattern *pattern, unsigned char *found_needle)
	Scan for the needles specified by the compiled pattern.
WS_DLL_PUBLIC const uint8_t *	ws_memrpbrk_exec (const uint8_t *haystack, size_t haystacklen, const ws_mempbrk_pattern *pattern, unsigned char *found_needle)
	Scan for the needles specified by the compiled pattern, starting at the end of the haystack and working backwards.

Detailed Description

Wireshark - Network traffic analyzer By Gerald Combs geral.nosp@m.d@wi.nosp@m.resha.nosp@m.rk.o.nosp@m.rg Copyright 1998 Gerald Combs

SPDX-License-Identifier: GPL-2.0-or-later

Function Documentation

ws_mempbrk_compile()

WS_DLL_PUBLIC void ws_mempbrk_compile	(	ws_mempbrk_pattern *	pattern,
		const char *	needles
	)

Compile the pattern for the needles to find using ws_mempbrk_exec().

Initializes the internal representation of the search pattern using the specified set of needle bytes. This enables efficient scanning of buffers for any matching byte.

Parameters

pattern	Pointer to the pattern structure to initialize.
needles	Null-terminated string of bytes to search for.

ws_mempbrk_exec()

WS_DLL_PUBLIC const uint8_t * ws_mempbrk_exec	(	const uint8_t *	haystack,
		size_t	haystacklen,
		const ws_mempbrk_pattern *	pattern,
		unsigned char *	found_needle
	)

Scan for the needles specified by the compiled pattern.

Searches the input buffer haystack for the first occurrence of any byte listed in the precompiled pattern. If a match is found, the matched byte is stored in found_needle (if non-NULL), and a pointer to its location in haystack is returned. Returns NULL if no match is found.

Parameters

haystack	Pointer to the input buffer to search.
haystacklen	Length of the input buffer in bytes.
pattern	Precompiled pattern containing target bytes.
found_needle	Optional output pointer to receive the matched byte.

Returns

Pointer to the first matching byte in haystack, or NULL if none found.

ws_memrpbrk_exec()

WS_DLL_PUBLIC const uint8_t * ws_memrpbrk_exec	(	const uint8_t *	haystack,
		size_t	haystacklen,
		const ws_mempbrk_pattern *	pattern,
		unsigned char *	found_needle
	)

Scan for the needles specified by the compiled pattern, starting at the end of the haystack and working backwards.

Searches the input buffer haystack in reverse for the first occurrence of any byte listed in the precompiled pattern. If a match is found, the matched byte is stored in found_needle (if non-NULL), and a pointer to its location in haystack is returned. Returns NULL if no match is found.

Parameters

haystack	Pointer to the input buffer to search.
haystacklen	Length of the input buffer in bytes.
pattern	Precompiled pattern containing target bytes.
found_needle	Optional output pointer to receive the matched byte.

Returns

Pointer to the first matching byte in haystack, or NULL if none found.