sc2replay parser
reads meta data out of starcraft 2 replay files.
Description of data format:
The data blocks that are being decoded follow the following basic layout.
TYPE:[Possible Additonal information (such as data length):DATA
Type Codes:
Scalar Types:
Static Length:
06 - Byte
07 - Integer
Variable Length:
02 - Binary Blob
09 - SDNV (Self-Delimiting Numeric Value)
Composite Types:
04 - Array
05 - Dictionary
Binary Blobs:
02:SDNV Encoded Length:Data Bytes
Example: 02 08 6E 69 6C 73
Length: 4
Data: (ASCII String) Nils
Arrays:
02:01 00:SDNV Encoded Length:[Data block] * length
Arrays seem to always contain a two byte value 01 00 at the beginning
right after the array type byte. Don't know if this value represents
something significant though.
Example: 02 01 00 08 09 02 09 02 09 02 09 02
Array of SDNV's
{1, 1, 1, 1}
Dictionaries:
05:SDNV Encoded Length:[SDNV Encoded Key:Data block] * length
Integers:
07:Integer value
Example: 07 00 00 53 32
SDNV:
09:SDNV Encoded Value
These numeric values are encoded using an algorithm very similar to:
http://tools.ietf.org/html/draft-irtf-dtnrg-sdnv-07
Differences:
- Replays contain encoded bytes in opposite byte order.
- Replays encode signedness by left shifting input value
and using right most bit to indicate sign.