archive format used by Eurofighter Typhoon and possibly other games by DID

xfs_dat.ksy

meta:
  id: xfs_dat
  file-extension: dat
  endian: le
  encoding: ASCII
seq:
  - id: header
    type: header
  - id: sections
    type: section
    repeat: expr
    repeat-expr: header.section_count
types:
  header:
    seq:
      - id: magic
        contents: ["DID DAT", 0x1A]
      - id: checksum
        type: u4
      - id: section_count
        type: u4
  info:
    seq:
      - id: size # maybe, not sure
        type: u4
      - id: hash_table_size
        type: u4
      - id: value
        size: 8
  hash_table_entry:
    seq:
      - id: name_hash
        type: u4
      - id: offset
        type: u4
    instances:
      contents:
        pos: offset
        type: data_section
  hash_table:
    seq:
      - id: files
        type: hash_table_entry
        repeat: eos
  extended_index:
    seq:
      - id: file_size
        type: u4
      - id: filename_size
        type: u1
      - id: filename
        type: str
        size: filename_size
  data_section:
    seq:
      - id: size
        type: u4
      - id: compression
        type: u4
      - id: data
        size: size
  section:
    seq:
      - id: type
        type: s4
        enum: type
      - id: offset
        type: u4
    enums:
      type:
        0: info
        1: unknown
        2: hash_index
        3: data
        4: extended_indexing
        -1: nothing
    instances:
      contents:
        pos: offset
        type:
          switch-on: type
          cases:
            'type::info': info
            'type::extended_indexing': extended_index
            'type::hash_index': hash_table