82 lines
2.0 KiB
C
82 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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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "config.h"
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#include <glib.h>
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#include "ws_symbol_export.h"
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#ifdef HAVE_SSE4_2
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#include "ws_cpuid.h"
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#endif
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#include "ws_mempbrk.h"
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const guint8 *
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_ws_mempbrk(const guint8* haystack, size_t haystacklen, const guint8 *needles)
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{
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gchar tmp[256] = { 0 };
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const guint8 *haystack_end;
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while (*needles)
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tmp[*needles++] = 1;
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haystack_end = haystack + haystacklen;
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while (haystack < haystack_end) {
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if (tmp[*haystack])
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return haystack;
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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(const guint8* haystack, size_t haystacklen, const guint8 *needles)
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{
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#ifdef HAVE_SSE4_2
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static int have_sse42 = -1;
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#endif
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if (*needles == 0)
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return NULL;
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#ifdef HAVE_SSE4_2
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if G_UNLIKELY(have_sse42 < 0)
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have_sse42 = ws_cpuid_sse42();
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if (haystacklen >= 16 && have_sse42)
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return _ws_mempbrk_sse42(haystack, haystacklen, needles);
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#endif
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return _ws_mempbrk(haystack, haystacklen, needles);
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}
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/*
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* Editor modelines - http://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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