1 /* $NetBSD: strcasestr.c,v 1.3 2005/11/29 03:12:00 christos Exp $ */
4 * Copyright (c) 1990, 1993
5 * The Regents of the University of California. All rights reserved.
7 * This code is derived from software contributed to Berkeley by
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19 * may be used to endorse or promote products derived from this software
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22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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35 #if defined(LIBC_SCCS) && !defined(lint)
36 __RCSID("$NetBSD: strcasestr.c,v 1.3 2005/11/29 03:12:00 christos Exp $");
37 __RCSID("$NetBSD: strncasecmp.c,v 1.2 2007/06/04 18:19:27 christos Exp $");
38 #endif /* LIBC_SCCS and not lint */
47 _strncasecmp(const char *s1, const char *s2, size_t n)
50 const unsigned char *us1 = (const unsigned char *)s1,
51 *us2 = (const unsigned char *)s2;
54 if (tolower(*us1) != tolower(*us2++))
55 return tolower(*us1) - tolower(*--us2);
64 * Find the first occurrence of find in s, ignore case.
67 strcasestr(const char *s, const char *find)
72 if ((c = *find++) != 0) {
73 c = tolower((unsigned char)c);
79 } while ((char)tolower((unsigned char)sc) != c);
80 } while (_strncasecmp(s, find, len) != 0);
83 return (char *)(intptr_t)(s);