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167f6230af
Now that both strlen and memrchr have word vectorized implementation, it should be faster to implement strrchr based on memrchr over the string length instead of calling strchr on a loop. Checked on x86_64-linux-gnu, i686-linux-gnu, powerpc-linux-gnu, and powerpc64-linux-gnu by removing the arch-specific assembly implementation and disabling multi-arch (it covers both LE and BE for 64 and 32 bits).
38 lines
1.1 KiB
C
38 lines
1.1 KiB
C
/* Copyright (C) 1991-2023 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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<https://www.gnu.org/licenses/>. */
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#include <string.h>
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#undef strrchr
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#ifndef STRRCHR
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# define STRRCHR strrchr
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#endif
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/* Find the last occurrence of C in S. */
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char *
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STRRCHR (const char *s, int c)
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{
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return __memrchr (s, c, strlen (s) + 1);
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}
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#ifdef weak_alias
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#undef rindex
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weak_alias (strrchr, rindex)
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#endif
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libc_hidden_builtin_def (strrchr)
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