xnu-344.21.73.tar.gz

[apple/xnu.git] / bsd / hfs / hfs_vfsutils.c

diff --git a/bsd/hfs/hfs_vfsutils.c b/bsd/hfs/hfs_vfsutils.c
index 386acae02507bf36778e8f948c27a8a8648bf439..63aa2a90ea671d19a392e081ca03df519bf74425 100644 (file)
--- a/bsd/hfs/hfs_vfsutils.c
+++ b/bsd/hfs/hfs_vfsutils.c
@@ -3,19 +3,22 @@
  *
  * @APPLE_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.
+ * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
  * 
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * 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. 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@
  */
@@ -1261,6 +1264,39 @@ hfs_relnamehints(struct cnode *dcp)
 }
 
 
+/*
+ * Perform a case-insensitive compare of two UTF-8 filenames.
+ *
+ * Returns 0 if the strings match.
+ */
+__private_extern__
+int
+hfs_namecmp(const char *str1, size_t len1, const char *str2, size_t len2)
+{
+       u_int16_t *ustr1, *ustr2;
+       size_t ulen1, ulen2;
+       size_t maxbytes;
+       int cmp = -1;
+
+       if (len1 != len2)
+               return (cmp);
+
+       maxbytes = kHFSPlusMaxFileNameChars << 1;
+       MALLOC(ustr1, u_int16_t *, maxbytes << 1, M_TEMP, M_WAITOK);
+       ustr2 = ustr1 + (maxbytes >> 1);
+
+       if (utf8_decodestr(str1, len1, ustr1, &ulen1, maxbytes, ':', 0) != 0)
+               goto out;
+       if (utf8_decodestr(str2, len2, ustr2, &ulen2, maxbytes, ':', 0) != 0)
+               goto out;
+       
+       cmp = FastUnicodeCompare(ustr1, ulen1>>1, ustr2, ulen2>>1);
+out:
+       FREE(ustr1, M_TEMP);
+       return (cmp);
+}
+
+
 __private_extern__
 int
 hfs_early_journal_init(struct hfsmount *hfsmp, HFSPlusVolumeHeader *vhp,