Make git pack files use little-endian size encoding

This makes it match the new delta encoding, and admittedly makes the
code easier to follow.

This also updates the PACK file version to 2, since this (and the delta
encoding change in the previous commit) are incompatible with the old
format.

1 files changed, 4 insertions, 1 deletions

diff --git a/sha1_file.c b/sha1_file.c
index 25208d2da..0bdaa16e7 100644
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -659,6 +659,7 @@ static int packed_delta_info(unsigned char *base_sha1,
 static unsigned long unpack_object_header(struct packed_git *p, unsigned long offset,
 	enum object_type *type, unsigned long *sizep)
 {
+	unsigned shift;
 	unsigned char *pack, c;
 	unsigned long size;
 
@@ -670,12 +671,14 @@ static unsigned long unpack_object_header(struct packed_git *p, unsigned long of
 	offset++;
 	*type = (c >> 4) & 7;
 	size = c & 15;
+	shift = 4;
 	while (c & 0x80) {
 		if (offset >= p->pack_size)
 			die("object offset outside of pack file");
 		c = *pack++;
 		offset++;
-		size = (size << 7) | (c & 0x7f);
+		size += (c & 0x7f) << shift;
+		shift += 7;
 	}
 	*sizep = size;
 	return offset;