Parser for Named Binary Tag (NBT), in Kaitai format (http://kaitai.io/)

nbt_parser.yaml

meta:
  id: nbt
  file-extension: nbt
  endian: be
  application: Named Binary Tag (NBT)
seq:
  - id: tag_compound
    type: tag_compound
types:
  tag_byte:
    seq:
      - id: content
        contents: s1
  tag_short:
    seq:
      - id: content
        contents: s2
  tag_int:
    seq:
      - id: content
        contents: s4
  tag_long:
    seq:
      - id: content
        contents: s8
  tag_float:
    seq:
      - id: content
        contents: f4
  tag_double:
    seq:
      - id: content
        contents: f8
  tag_byte_array:
    seq:
      - id: length
        contents: tag_int
      - id: content
        size: length
  tag_string:
    seq:
      - id: length
        contents: tag_short
      - id: content
        size: length
        type: str
        encoding: UTF-8
  tag_list:
    seq:
      - id: tag_id
        contents: tag_byte
      - id: length
        contents: tag_int
      - id: content
        repeat-expr: length
        repeat: expr
        type:
          switch-on: tag_id
          cases:
            1: tag_byte
            2: tag_short
            3: tag_int
            4: tag_long
            5: tag_float
            6: tag_double
            7: tag_byte_array
            8: tag_string
            9: tag_list
            10: tag_compound
  tag_compound:
    seq:
      - id: tag_type
        type: u1
      - id: tag_name
        type: tag_string
      - id: payload
        type:
          switch-on: tag_type
          cases:
            1: tag_byte
            2: tag_short
            3: tag_int
            4: tag_long
            5: tag_float
            6: tag_double
            7: tag_byte_array
            8: tag_string
            9: tag_list
            10: tag_compound
      - id: tag_end
        contents: [0]