BootX-59.tar.gz

[apple/bootx.git] / bootx.tproj / fs.subproj / HFSCompare.c

diff --git a/bootx.tproj/fs.subproj/HFSCompare.c b/bootx.tproj/fs.subproj/HFSCompare.c
index 68faed6e97e50232ec721414fb55ecbd7dbadcb2..d159c5efb364757bde21f75b4da522edefb9d8fa 100644 (file)
--- a/bootx.tproj/fs.subproj/HFSCompare.c
+++ b/bootx.tproj/fs.subproj/HFSCompare.c
@@ -194,6 +194,41 @@ int32_t FastUnicodeCompare (u_int16_t *str1, register u_int32_t length1,
                return 1;
 }
 
+//
+//  BinaryUnicodeCompare - Compare two Unicode strings; produce a relative ordering
+//  Compared using a 16-bit binary comparison (no case folding)
+//
+int32_t BinaryUnicodeCompare (u_int16_t * str1, u_int32_t length1,
+                             u_int16_t * str2, u_int32_t length2)
+{
+       register u_int16_t c1, c2;
+       int32_t bestGuess;
+       u_int32_t length;
+
+       bestGuess = 0;
+
+       if (length1 < length2) {
+               length = length1;
+               --bestGuess;
+       } else if (length1 > length2) {
+               length = length2;
+               ++bestGuess;
+       } else {
+               length = length1;
+       }
+
+       while (length--) {
+               c1 = *(str1++);
+               c2 = *(str2++);
+
+               if (c1 > c2)
+                       return (1);
+               if (c1 < c2)
+                       return (-1);
+       }
+
+       return (bestGuess);
+}
 
 /*
  * UTF-8 (UCS Transformation Format)