56 lines
1.7 KiB
C
56 lines
1.7 KiB
C
/*-
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* Copyright (c) 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Chris Torek.
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*
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* Redistribution and use in source and binary forms are permitted
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* provided that: (1) source distributions retain this entire copyright
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* notice and comment, and (2) distributions including binaries display
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* the following acknowledgement: ``This product includes software
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* developed by the University of California, Berkeley and its contributors''
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* in the documentation or other materials provided with the distribution
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* and in all advertising materials mentioning features or use of this
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* software. Neither the name of the University nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*/
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#if defined(LIBC_SCCS) && !defined(lint)
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static char sccsid[] = "@(#)strcasestr.c 5.1 (Berkeley) 5/15/90";
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#endif /* LIBC_SCCS and not lint */
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#include <string.h>
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/*
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* Find the first occurrence of find in s.
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*/
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char *
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#ifdef __STDC__
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strcasestr(register char *s, register char *find)
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#else
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strcasestr(s,find)
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register char *s;
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register char *find;
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#endif
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{
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register char c,
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sc;
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register size_t len;
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if ((c = *find++) != 0) {
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len = strlen(find);
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do {
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do {
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if ((sc = *s++) == 0)
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return (NULL);
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} while (sc != c);
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} while (strncasecmp(s, find, len) != 0);
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s--;
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}
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return ((char *) s);
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}
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