Lightpath 0.79 | MajiroArc v1 & v2 | by Proger_XP

This model will process MjArc files and show you file
names, offsets, data and will even let you extract them!

It supports both version 1 and version 2 formats and
will automatically choose one based on the file's signature.

This script is lpx-ready and can be embedded to extract
data by users with no special knowledge of Lightpath.

== Options ==
lpx.DataPath = *\files\file\data\bytes$start
lpx.DataExpr =
lpx.NamePath = ..name
lpx.NameExpr = 'shift-jis' charset
lpx.DefaultFiles = scenario*.arc

== Model ==
; 32-bit value.
(dword) % ANY ANY ANY ANY

; End Of File entry for v1.
(endRec)
  . dword "hash" x 00 00 00 00
  . dword "offset"

; Version 1 of MajiroArc
"v1" % MajiroArcV1.000 \0

  ; -- Archive Header --
  . dword "fileCount"
  . dword "nameOffset"
  . dword "dataOffset"

  ; -- File Table (hash, offset, size) --
  . "files" =
    "file"? iteration .fileCount$start toint <
      . dword "hash"
      . dword "offset"
    END
  . endRec "+files\file"
  .? ? offset nameOffset$start toint <>
    WARN "File table ended on wrong offset!"

  ; -- File Name List --
  . names =
    "+files\file[n]\name"? iteration fileCount$start toint <
      % [^\0]+
      END x 00
    END
  .? ? offset dataOffset$start toint <>
    WARN "Name table ended on wrong offset!"

  ; -- Data Section --
  . data =
    END? iteration fileCount$start toint =
    "+files\file[n]\data" =
      . ? .offset$start toint tooffset
      . "bytes"? ..foobarbazz$start

; Version 2 of MajiroArc
@v1 "v2" % MajiroArcV2.000 \0
  files
    file
      . "size" % ANY ANY ANY ANY
  (@endRec)
    ; Clearing End Of File entry - v2 has none.
  data
    @data
      @bytes? .size$start toint skip
  ; Suppressing "input left" warning.
  . ? length skip

=== Supported ==
% MajiroArcV [12] .000 \0