xnu-792.12.6.tar.gz

[apple/xnu.git] / osfmk / device / subrs.c

diff --git a/osfmk/device/subrs.c b/osfmk/device/subrs.c
index ad8b9c34f666c9cb0fbb2ae235d32a8a22bbd8ac..a9c6e0beb47635d023f10da013b550852d6ad9f2 100644 (file)
--- a/osfmk/device/subrs.c
+++ b/osfmk/device/subrs.c
@@ -1,23 +1,31 @@
 /*
  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
  *
- * @APPLE_LICENSE_HEADER_START@
+ * @APPLE_LICENSE_OSREFERENCE_HEADER_START@
  * 
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License").  You may not use this file except in compliance with the
- * License.  Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
- * 
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
- * License for the specific language governing rights and limitations
- * under the License.
- * 
- * @APPLE_LICENSE_HEADER_END@
+ * This file contains Original Code and/or Modifications of Original Code 
+ * as defined in and that are subject to the Apple Public Source License 
+ * Version 2.0 (the 'License'). You may not use this file except in 
+ * compliance with the License.  The rights granted to you under the 
+ * License may not be used to create, or enable the creation or 
+ * redistribution of, unlawful or unlicensed copies of an Apple operating 
+ * system, or to circumvent, violate, or enable the circumvention or 
+ * violation of, any terms of an Apple operating system software license 
+ * agreement.
+ *
+ * Please obtain a copy of the License at 
+ * http://www.opensource.apple.com/apsl/ and read it before using this 
+ * file.
+ *
+ * The Original Code and all software distributed under the License are 
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 
+ * Please see the License for the specific language governing rights and 
+ * limitations under the License.
+ *
+ * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
  */
 /*
  * @OSF_COPYRIGHT@
@@ -166,6 +174,49 @@ strncmp(
         return 0;
 }
 
+
+//
+// Lame implementation just for use by strcasecmp/strncasecmp
+//
+static int
+tolower(unsigned char ch)
+{
+    if (ch >= 'A' && ch <= 'Z')
+       ch = 'a' + (ch - 'A');
+
+    return ch;
+}
+
+int
+strcasecmp(const char *s1, const char *s2)
+{
+    const unsigned 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(const char *s1, const char *s2, size_t n)
+{
+    if (n != 0) {
+       const unsigned 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);
+}
+
+
 /*
  * Abstract:
  *      strcpy copies the contents of the string "from" including
@@ -214,27 +265,6 @@ strncpy(
         return (os1);
 }
 
-
-#if !defined(__alpha)
-
-/*
- * Abstract:
- *      strlen returns the number of characters in "string" preceeding
- *      the terminating null character.
- */
-
-size_t
-strlen(
-        register const char *string)
-{
-        register const char *ret = string;
-
-        while (*string++ != '\0')
-                continue;
-        return string - 1 - ret;
-}
-#endif /* !defined(__alpha) */
-
 /*
  * atoi:
  *