wsutil/ws_mempbrk.h

   1 /** @file
   2  *
   3  * Wireshark - Network traffic analyzer
   4  * By Gerald Combs <gerald@wireshark.org>
   5  * Copyright 1998 Gerald Combs
   6  *
   7  * SPDX-License-Identifier: GPL-2.0-or-later
   8  */
   9
  10 #ifndef __WS_MEMPBRK_H__
  11 #define __WS_MEMPBRK_H__
  12
  13 #include <wireshark.h>
  14
  15 #ifdef HAVE_SSE4_2
  16 #include <emmintrin.h>
  17 #endif
  18
  19 /** The pattern object used for ws_mempbrk_exec().
  20  */
  21 typedef struct {
  22     char patt[256];
  23 #ifdef HAVE_SSE4_2
  24     bool use_sse42;
  25     __m128i mask;
  26 #endif
  27 } ws_mempbrk_pattern;
  28
  29 /** Compile the pattern for the needles to find using ws_mempbrk_exec().
  30  */
  31 WS_DLL_PUBLIC void ws_mempbrk_compile(ws_mempbrk_pattern* pattern, const char *needles);
  32
  33 /** Scan for the needles specified by the compiled pattern.
  34  */
  35 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);
  36
  37 /** Scan for the needles specified by the compiled pattern, starting at the
  38  * end of the haystack and working backwards.
  39  */
  40 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);
  41
  42 #endif /* __WS_MEMPBRK_H__ */