X-Git-Url: https://git.tokkee.org/?a=blobdiff_plain;f=Documentation%2Ftechnical%2Fpack-format.txt;h=1803e64e465fa4f8f0fe520fc0fd95d0c9def5bd;hb=9c6c304d6a01b72d7ce20722b80ca62e01fe8356;hp=a80baa4382ce72cd6d3e1f1719a17264fc36ee02;hpb=bd8ff616c998da8b08bd59b47644408048b3016d;p=git.git

diff --git a/Documentation/technical/pack-format.txt b/Documentation/technical/pack-format.txt
index a80baa438..1803e64e4 100644
--- a/Documentation/technical/pack-format.txt
+++ b/Documentation/technical/pack-format.txt
@@ -103,10 +103,24 @@ Pack file entry: <+
      packed object data:
         If it is not DELTA, then deflated bytes (the size above
 		is the size before compression).
-	If it is DELTA, then
+	If it is REF_DELTA, then
 	  20-byte base object name SHA1 (the size above is the
 		size of the delta data that follows).
           delta data, deflated.
+	If it is OFS_DELTA, then
+	  n-byte offset (see below) interpreted as a negative
+		offset from the type-byte of the header of the
+		ofs-delta entry (the size above is the size of
+		the delta data that follows).
+	  delta data, deflated.
+
+     offset encoding:
+	  n bytes with MSB set in all but the last one.
+	  The offset is then the number constructed by
+	  concatenating the lower 7 bit of each byte, and
+	  for n >= 2 adding 2^7 + 2^14 + ... + 2^(7*(n-1))
+	  to the result.
+
 
 
 = Version 2 pack-*.idx files support packs larger than 4 GiB, and
@@ -125,7 +139,7 @@ Pack file entry: <+
 
   - A table of 4-byte CRC32 values of the packed object data.
     This is new in v2 so compressed data can be copied directly
-    from pack to pack during repacking withough undetected
+    from pack to pack during repacking without undetected
     data corruption.
 
   - A table of 4-byte offset values (in network byte order).