Documentation/pack-format.txt: Clear up description of types.

Signed-off-by: Peter Eriksen <s022018@student.dtu.dk>
Signed-off-by: Junio C Hamano <junkio@cox.net>

diff --git a/Documentation/technical/pack-format.txt b/Documentation/technical/pack-format.txt
index 0e1ffb24276027aa54c6b04fe404367f267cc07d..9ce3c473ae1a9b5fd0b3a909fb264d8e0fff27a5 100644 (file)
--- a/Documentation/technical/pack-format.txt
+++ b/Documentation/technical/pack-format.txt
@@ -21,11 +21,11 @@ GIT pack format
      which looks like this:
 
      (undeltified representation)
      which looks like this:
 
      (undeltified representation)

-     n-byte type and length (4-bit type, (n-1)*7+4-bit length)
+     n-byte type and length (3-bit type, (n-1)*7+4-bit length)

      compressed data
 
      (deltified representation)
      compressed data
 
      (deltified representation)

-     n-byte type and length (4-bit type, (n-1)*7+4-bit length)
+     n-byte type and length (3-bit type, (n-1)*7+4-bit length)

      20-byte base object name
      compressed delta data
 
      20-byte base object name
      compressed delta data
 


@@ -102,11 +102,13 @@ trailer     | | packfile checksum              |
 Pack file entry: <+
 
      packed object header:
 Pack file entry: <+
 
      packed object header:

-       1-byte type (upper 4-bit)
+       1-byte size extension bit (MSB)
+              type (next 3 bit)

               size0 (lower 4-bit) 
         n-byte sizeN (as long as MSB is set, each 7-bit)
                size0..sizeN form 4+7+7+..+7 bit integer, size0
               size0 (lower 4-bit) 
         n-byte sizeN (as long as MSB is set, each 7-bit)
                size0..sizeN form 4+7+7+..+7 bit integer, size0

-               is the most significant part.
+               is the least significant part, and sizeN is the
+               most significant part.

      packed object data:
         If it is not DELTA, then deflated bytes (the size above
                is the size before compression).
      packed object data:
         If it is not DELTA, then deflated bytes (the size above
                is the size before compression).