/*
-strcasecmp.c
-
-Created Oct 14, 1991 by Philip Homburg
-*/
+ * Copyright (c) 1987, 1993
+ * The Regents of the University of California. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the University of
+ * California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+#include <sys/types.h>
+#include <ansi.h>
+#include <strings.h>
#include <ctype.h>
-#include <string.h>
-
-#ifdef __STDC__
-#define _CONST const
-#else
-#define _CONST
-#endif
int
strcasecmp(s1, s2)
-_CONST char *s1, *s2;
+ const char *s1, *s2;
{
- int c1, c2;
- while (c1= toupper(*s1++), c2= toupper(*s2++), c1 == c2 && (c1 & c2))
- ;
- if (c1 & c2)
- return c1 < c2 ? -1 : 1;
- return c1 ? 1 : (c2 ? -1 : 0);
+ const u_char
+ *us1 = (const u_char *)s1,
+ *us2 = (const u_char *)s2;
+
+ while (tolower(*us1) == tolower(*us2++))
+ if (*us1++ == '\0')
+ return (0);
+ return (tolower(*us1) - tolower(*--us2));
}
int
-strncasecmp(s1, s2, len)
-_CONST char *s1, *s2;
-size_t len;
+strncasecmp(s1, s2, n)
+ const char *s1, *s2;
+ size_t n;
{
- int c1, c2;
- do {
- if (len == 0)
- return 0;
- len--;
- } while (c1= toupper(*s1++), c2= toupper(*s2++), c1 == c2 && (c1 & c2))
- ;
- if (c1 & c2)
- return c1 < c2 ? -1 : 1;
- return c1 ? 1 : (c2 ? -1 : 0);
+ if (n != 0) {
+ const u_char
+ *us1 = (const u_char *)s1,
+ *us2 = (const u_char *)s2;
+
+ do {
+ if (tolower(*us1) != tolower(*us2++))
+ return (tolower(*us1) - tolower(*--us2));
+ if (*us1++ == '\0')
+ break;
+ } while (--n != 0);
+ }
+ return (0);
}