[PATCH] hfs: add HFSX support

Add support for HFSX, which allows for case-sensitive filenames.

Signed-off-by: Roman Zippel <zippel@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 29 insertions, 1 deletions

diff --git a/fs/hfsplus/unicode.c b/fs/hfsplus/unicode.c
index 060c69048c3d..689c8bd721fb 100644
--- a/fs/hfsplus/unicode.c
+++ b/fs/hfsplus/unicode.c
@@ -28,7 +28,8 @@ static inline u16 case_fold(u16 c)
 }
 
 /* Compare unicode strings, return values like normal strcmp */
-int hfsplus_unistrcmp(const struct hfsplus_unistr *s1, const struct hfsplus_unistr *s2)
+int hfsplus_strcasecmp(const struct hfsplus_unistr *s1,
+                       const struct hfsplus_unistr *s2)
 {
         u16 len1, len2, c1, c2;
         const hfsplus_unichr *p1, *p2;
@@ -59,6 +60,33 @@ int hfsplus_unistrcmp(const struct hfsplus_unistr *s1, const struct hfsplus_unis
         }
 }
 
+/* Compare names as a sequence of 16-bit unsigned integers */
+int hfsplus_strcmp(const struct hfsplus_unistr *s1,
+                   const struct hfsplus_unistr *s2)
+{
+        u16 len1, len2, c1, c2;
+        const hfsplus_unichr *p1, *p2;
+        int len;
+
+        len1 = be16_to_cpu(s1->length);
+        len2 = be16_to_cpu(s2->length);
+        p1 = s1->unicode;
+        p2 = s2->unicode;
+
+        for (len = min(len1, len2); len > 0; len--) {
+                c1 = be16_to_cpu(*p1);
+                c2 = be16_to_cpu(*p2);
+                if (c1 != c2)
+                        return c1 < c2 ? -1 : 1;
+                p1++;
+                p2++;
+        }
+
+        return len1 < len2 ? -1 :
+               len1 > len2 ? 1 : 0;
+}
+
+
 #define Hangul_SBase    0xac00
 #define Hangul_LBase    0x1100
 #define Hangul_VBase    0x1161