Annotation of mandoc/compat_strcasestr.c, Revision 1.1
1.1 ! schwarze 1: #ifdef HAVE_CONFIG_H
! 2: #include "config.h"
! 3: #endif
! 4:
! 5: #ifdef HAVE_STRCASESTR
! 6:
! 7: int dummy;
! 8:
! 9: #else
! 10:
! 11: /* ($)NetBSD: strcasestr.c,v 1.2 2005/02/09 21:35:47 kleink Exp $ */
! 12:
! 13: /*-
! 14: * Copyright (c) 1990, 1993
! 15: * The Regents of the University of California. All rights reserved.
! 16: *
! 17: * This code is derived from software contributed to Berkeley by
! 18: * Chris Torek.
! 19: *
! 20: * Redistribution and use in source and binary forms, with or without
! 21: * modification, are permitted provided that the following conditions
! 22: * are met:
! 23: * 1. Redistributions of source code must retain the above copyright
! 24: * notice, this list of conditions and the following disclaimer.
! 25: * 2. Redistributions in binary form must reproduce the above copyright
! 26: * notice, this list of conditions and the following disclaimer in the
! 27: * documentation and/or other materials provided with the distribution.
! 28: * 3. Neither the name of the University nor the names of its contributors
! 29: * may be used to endorse or promote products derived from this software
! 30: * without specific prior written permission.
! 31: *
! 32: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 33: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 34: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 35: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 36: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 37: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 38: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 39: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 40: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 41: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 42: * SUCH DAMAGE.
! 43: */
! 44:
! 45: #include <sys/types.h>
! 46: #include <ctype.h>
! 47: #include <string.h>
! 48:
! 49: #define __UNCONST(a) ((void *)(unsigned long)(const void *)(a))
! 50:
! 51: /*
! 52: * Find the first occurrence of find in s, ignore case.
! 53: */
! 54: char *
! 55: strcasestr(const char *s, const char *find)
! 56: {
! 57: char c, sc;
! 58: size_t len;
! 59:
! 60: if ((c = *find++) != 0) {
! 61: c = tolower((unsigned char)c);
! 62: len = strlen(find);
! 63: do {
! 64: do {
! 65: if ((sc = *s++) == 0)
! 66: return (NULL);
! 67: } while ((char)tolower((unsigned char)sc) != c);
! 68: } while (strncasecmp(s, find, len) != 0);
! 69: s--;
! 70: }
! 71: return __UNCONST(s);
! 72: }
! 73:
! 74: #endif
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