forked from osmocom/wireshark
87 lines
2.0 KiB
C
87 lines
2.0 KiB
C
/* ws_mempbrk.c
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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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#include "config.h"
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/* see bug 10798: there is a bug in the compiler the buildbots use for Mac OSX
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and SSE4.2, so we're not going to use SSE4.2 with Mac OSX right now, for
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older Mac OSX compilers.
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*/
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#ifdef __APPLE__
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#if defined(__clang__) && (__clang_major__ >= 6)
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/* allow HAVE_SSE4_2 to be used for clang 6.0+ case because we know it works */
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#else
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/* don't allow it otherwise, for Mac OSX */
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#undef HAVE_SSE4_2
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#endif
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#endif
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#include <glib.h>
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#include "ws_symbol_export.h"
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#include "ws_mempbrk.h"
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#include "ws_mempbrk_int.h"
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void
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ws_mempbrk_compile(ws_mempbrk_pattern* pattern, const gchar *needles)
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{
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const gchar *n = needles;
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while (*n) {
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pattern->patt[(int)*n] = 1;
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n++;
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}
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#ifdef HAVE_SSE4_2
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ws_mempbrk_sse42_compile(pattern, needles);
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#endif
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}
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const guint8 *
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ws_mempbrk_portable_exec(const guint8* haystack, size_t haystacklen, const ws_mempbrk_pattern* pattern, guchar *found_needle)
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{
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const guint8 *haystack_end = haystack + haystacklen;
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while (haystack < haystack_end) {
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if (pattern->patt[*haystack]) {
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if (found_needle)
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*found_needle = *haystack;
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return haystack;
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}
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haystack++;
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}
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return NULL;
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}
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WS_DLL_PUBLIC const guint8 *
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ws_mempbrk_exec(const guint8* haystack, size_t haystacklen, const ws_mempbrk_pattern* pattern, guchar *found_needle)
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{
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#ifdef HAVE_SSE4_2
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if (haystacklen >= 16 && pattern->use_sse42)
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return ws_mempbrk_sse42_exec(haystack, haystacklen, pattern, found_needle);
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#endif
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return ws_mempbrk_portable_exec(haystack, haystacklen, pattern, found_needle);
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}
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/*
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* Editor modelines - https://www.wireshark.org/tools/modelines.html
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*
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* Local variables:
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* c-basic-offset: 8
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* tab-width: 8
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* indent-tabs-mode: t
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* End:
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*
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* vi: set shiftwidth=8 tabstop=8 noexpandtab:
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* :indentSize=8:tabSize=8:noTabs=false:
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*/
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