| 141,6 → 141,7 |
|---|
| |
| if ($version == 2) { |
| // Get CRC32 |
| // TODO: is this correct? or do we need to read 'H8' ? |
| fseek($fp, $fanout_offset + 4*256 + 20*$num_objects + 4*$object_no); |
| $crc32 = unpack('N', fread($fp,4))[1]; |
| if ($debug) echo "CRC32 = ".sprintf('0x%08x',$crc32)."\n"; |
| 175,7 → 176,7 |
|---|
| fseek($fp, $pack_offset); |
| $size_info = unpack('C', fread($fp,1))[1]; |
| |
| $type = ($size_info & 0xE0) >> 5; /*0b11100000*/ |
| $type = ($size_info & 0x70) >> 4; /*0b01110000*/ |
| switch ($type) { |
| case 1: |
| if ($debug) echo "Type = OBJ_COMMIT ($type)\n"; |
| 201,21 → 202,31 |
|---|
| } |
| |
| // Find out size |
| $size = $size_info & 0x1F /*0x00011111*/; |
| $shift_info = 5; |
| do { |
| $size = $size_info & 0xF /*0x00001111*/; |
| $shift_info = 4; |
| while ($size_info >= 0x80) { |
| $size_info = unpack('C', fread($fp,1))[1]; |
| $size = (($size_info & 0x7F) << $shift_info) + $size; |
| $shift_info += 8; |
| } while ($size_info >= 0x80); |
| $shift_info += 7; |
| } |
| |
| // TODO: Is this the packed or unpacked size? http://driusan.github.io/git-pack.html |
| if ($debug) echo "Packed size = ".sprintf('0x%x',$size)."\n"; |
| |
| // Read delta base type |
| if ($type == 6/*OBJ_OFS_DELTA*/) { |
| // "a negative relative offset from the delta object's position in the pack if this is an OBJ_OFS_DELTA object" |
| $delta_info = unpack('C*', fread($fp,4))[1]; |
| if ($debug) echo "Delta negative offset: $delta_info\n"; |
| |
| // Offset encoding |
| $offset = 0; |
| $shift_info = 0; |
| do { |
| $offset_info = unpack('C', fread($fp,1))[1]; |
| $offset = (($offset_info & 0x7F) << $shift_info) + $offset; |
| $shift_info += 7; |
| } while ($offset_info >= 0x80); |
| |
| if ($debug) echo "Delta negative offset: $offset\n"; |
| throw new Exception("OBJ_OFS_DELTA is currently not implemented"); // TODO! Implement OBJ_OFS_DELTA! |
| } |
| if ($type == 7/*OBJ_REF_DELTA*/) { |
| 238,7 → 249,7 |
|---|
| |
| // Check CRC32 |
| // TODO: Does not fit; neither crc32, nor crc32b... |
| // if ($debug) echo "CRC32 found = 0x".hash('crc32',$compressed)."\n"; |
| // if ($debug) echo "CRC32 found = 0x".hash('crc32',$compressed)." vs $crc32\n"; |
| |
| return $uncompressed; |
| } |