b6cbf7203b
This patch imports the unmodified current version of NetBSD libc. The NetBSD includes are in /nbsd_include, while the libc code itself is split between lib/nbsd_libc and common/lib/libc.
71 lines
2.4 KiB
C
71 lines
2.4 KiB
C
/* $NetBSD: strpbrk.c,v 1.19 2008/09/24 16:58:53 christos Exp $ */
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/*-
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* Copyright (c) 2008 Joerg Sonnenberger
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__RCSID("$NetBSD: strpbrk.c,v 1.19 2008/09/24 16:58:53 christos Exp $");
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#include <assert.h>
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#include <inttypes.h>
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#include <limits.h>
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#include <string.h>
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#define FAST_STRPBRK 1
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#define UC(a) ((unsigned int)(unsigned char)(a))
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#ifdef FAST_STRPBRK
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#define ADD_NEW_TO_SET(i) (set[inv[i] = idx++] = (i))
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#define IS_IN_SET(i) (inv[i] < idx && set[inv[i]] == (i))
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#define ADD_TO_SET(i) (void)(IS_IN_SET(i) || /*LINTED no effect*/ADD_NEW_TO_SET(i))
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#else
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#define IS_IN_SET(i) (set[(i) >> 3] & idx[(i) & 7])
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#define ADD_TO_SET(i) (void)(set[(i) >> 3] |= idx[(i) & 7])
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#endif
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char *
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strpbrk(const char *s, const char *charset)
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{
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#ifdef FAST_STRPBRK
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uint8_t set[256], inv[256], idx = 0;
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#else
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static const size_t idx[8] = { 1, 2, 4, 8, 16, 32, 64, 128 };
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uint8_t set[32];
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(void)memset(set, 0, sizeof(set));
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#endif
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_DIAGASSERT(s != NULL);
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_DIAGASSERT(charset != NULL);
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for (; *charset != '\0'; ++charset)
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ADD_TO_SET(UC(*charset));
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for (; *s != '\0'; ++s)
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if (IS_IN_SET(UC(*s)))
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return __UNCONST(s);
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return NULL;
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}
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