2 files changed, 19 insertions, 4 deletions

diff --git a/src/oid.c b/src/oid.c
index f743da8ac..8dc6903cd 100644
--- a/src/oid.c
+++ b/src/oid.c
@@ -177,15 +177,20 @@ int git_oid_match_raw(unsigned int len, const unsigned char *a, const unsigned c
 {
         do {
                 if (*a != *b)
-                        return 0;
+                        return 1;
                 a++;
                 b++;
                 len -= 2;
         } while (len > 1);
         if (len)
                 if ((*a ^ *b) & 0xf0)
-                        return 0;
-        return 1;
+                        return 1;
+        return 0;
+}
+
+int git_oid_match_hex(unsigned int len, const unsigned char *a, const unsigned char *b)
+{
+	return memcmp(a, b, len);
 }
 
 int gid_oid_match(unsigned int len, git_oid *a, git_oid *b)
diff --git a/src/oid.h b/src/oid.h
index 79f5b6507..1cd2450d6 100644
--- a/src/oid.h
+++ b/src/oid.h
@@ -1,7 +1,17 @@
 #ifndef INCLUDE_oid_h__
 #define INCLUDE_oid_h__
 
-/* This can be useful for internal use */
+/**
+ * Compare the first ('len'*4) bits of two raw formatted oids.
+ * This can be useful for internal use.
+ * Return 0 if they match.
+ */
 int git_oid_match_raw(unsigned int len, const unsigned char *a, const unsigned char *b);
 
+/**
+ * Compare the first 'len' characters of two hex formatted oids.
+ * Return 0 if they match.
+ */
+int git_oid_match_hex(unsigned int len, const unsigned char *a, const unsigned char *b);
+
 #endif