Langband has been inspired by the ARFC002 penned by Andrew Sidwell, but has done some modifications. This document describes the Langband savefile format in v0.1.2:
The savefile is constructed of a "savefile header", then followed by blocks. Little endian is used for this savefile format.
The file header has a four-byte "magic number". This magic number differs from "126.96.36.199" in ARFC002 and is "188.8.131.52". (This spoils some of the magic number pun, but this is an iteration :-) This can easily be used to check if indeed this is a langband savefile. The magic number is followed by two u16b version numbers; a version number for the engine used and a version number for the variant. Langband is split in engine and variant and both of these numbers are relevant. Regular angbands may eventually need both numbers if lua-scripting expands and lua "mods" written by users change from a released version but needs savefile access.104 bytes in total.
|Format of file header|
|byte||Fake major: 83|
|byte||Fake minor: 97|
|byte||Fake patch: 118|
|byte||Fake extra: 102|
|24 bytes||Id that identifies variant/mod/patchset to use|
|u16b||Savefile status, a code of 0 means the character is dead|
|64 bytes||Description of the savegame, useful for a savebrowser or when selecting one of many saves.|
|u16b||Number of saveblocks in the file|
This header may be extended with a savedate, and other info at a later date. Input appreciated.
|Format of a saveblock|
|u32b (4 bytes)||Vendor of block, eg- personal "key" (Langband uses 1337)|
|u16b (2 bytes)||Type of block|
|u16b (2 bytes)||Block version number|
|u32b (4 bytes)||Length of data-field in the block|
|u128b (16 bytes)||Checksum for the savebuffer|
|xxx||The actual data (Length specified earlier in header)|