xnu-792.22.5.tar.gz

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

diff --git a/osfmk/device/subrs.c b/osfmk/device/subrs.c
index 1282fd398f7ae514c2b38d9752742c26524d0824..d71b43a10b1b0e53cf6245871731c010d268b3ba 100644 (file)
--- a/osfmk/device/subrs.c
+++ b/osfmk/device/subrs.c
@@ -1,23 +1,29 @@
 /*
  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
  *
- * @APPLE_LICENSE_HEADER_START@
+ * @APPLE_OSREFERENCE_LICENSE_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 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.
  * 
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * 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 OR NON-INFRINGEMENT.  Please see the
- * License for the specific language governing rights and limitations
- * under the License.
+ * 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_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  */
 /*
  * @OSF_COPYRIGHT@
@@ -166,6 +172,49 @@ 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