[PATCH] denser delta header encoding

[git.git] / diff-delta.c

diff --git a/diff-delta.c b/diff-delta.c
index fd9b37f..67f6081 100644 (file)
--- a/diff-delta.c
+++ b/diff-delta.c
@@ -228,28 +228,22 @@ void *diff_delta(void *from_buf, unsigned long from_size,
        top = to_buf + to_size;
 
        /* store reference buffer size */
-       orig = out + outpos++;
-       *orig = i = 0;
-       do {
-               if (from_size & 0xff) {
-                       *orig |= (1 << i);
-                       out[outpos++] = from_size;
-               }
-               i++;
-               from_size >>= 8;
-       } while (from_size);
+       out[outpos++] = from_size;
+       from_size >>= 7;
+       while (from_size) {
+               out[outpos - 1] |= 0x80;
+               out[outpos++] = from_size;
+               from_size >>= 7;
+       }
 
        /* store target buffer size */
-       orig = out + outpos++;
-       *orig = i = 0;
-       do {
-               if (to_size & 0xff) {
-                       *orig |= (1 << i);
-                       out[outpos++] = to_size;
-               }
-               i++;
-               to_size >>= 8;
-       } while (to_size);
+       out[outpos++] = to_size;
+       to_size >>= 7;
+       while (to_size) {
+               out[outpos - 1] |= 0x80;
+               out[outpos++] = to_size;
+               to_size >>= 7;
+       }
 
        inscnt = 0;
        moff = 0;