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3038145ca2
assembler version by tailcalling memchr with the maximum size. If a target has an optimized memchr this is significantly faster, if not, then this makes little difference. Also optimize the special case of zero to use strlen as this is typically faster than memchr. * string/rawmemchr.c (RAWMEMCHR): Use faster memchr/strlen.
34 lines
1.1 KiB
C
34 lines
1.1 KiB
C
/* Copyright (C) 1991-2016 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library 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 GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <string.h>
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#ifndef RAWMEMCHR
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# define RAWMEMCHR __rawmemchr
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#endif
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/* Find the first occurrence of C in S. */
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void *
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RAWMEMCHR (const void *s, int c)
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{
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if (c != '\0')
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return memchr (s, c, (size_t)-1);
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return (char *)s + strlen (s);
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}
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libc_hidden_def (__rawmemchr)
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weak_alias (__rawmemchr, rawmemchr)
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