.chg file format of MONOMAKH-SAPR: Ruby parsing library

CHG is a container format file used by MONOMAKH-SAPR, a software package for analysis & design of reinforced concrete multi-storey buildings with arbitrary configuration in plan.

CHG is a simple container, which bundles several project files together.

Written and tested by Vladimir Shulzhitskiy, 2017

Application

MONOMAKH-SAPR

File extension

chg

KS implementation details

License: CC0-1.0
Minimal Kaitai Struct required: 0.7

This page hosts a formal specification of .chg file format of MONOMAKH-SAPR using Kaitai Struct. This specification can be automatically translated into a variety of programming languages to get a parsing library.

Usage

Runtime library

All parsing code for Ruby generated by Kaitai Struct depends on the Ruby runtime library. You have to install it before you can parse data.

The Ruby runtime library can be installed from RubyGems:

gem install kaitai-struct

Code

Parse a local file and get structure in memory:

data = MonomakhSaprChg.from_file("path/to/local/file.chg")

Or parse structure from a string of bytes:

bytes = "\x00\x01\x02..."
data = MonomakhSaprChg.new(Kaitai::Struct::Stream.new(bytes))

After that, one can get various attributes from the structure by invoking getter methods like:

data.title # => get title

Ruby source code to parse .chg file format of MONOMAKH-SAPR

monomakh_sapr_chg.rb

# This is a generated file! Please edit source .ksy file and use kaitai-struct-compiler to rebuild

require 'kaitai/struct/struct'

unless Gem::Version.new(Kaitai::Struct::VERSION) >= Gem::Version.new('0.9')
  raise "Incompatible Kaitai Struct Ruby API: 0.9 or later is required, but you have #{Kaitai::Struct::VERSION}"
end


##
# CHG is a container format file used by
# [MONOMAKH-SAPR](https://www.liraland.com/mono/index.php), a software
# package for analysis & design of reinforced concrete multi-storey
# buildings with arbitrary configuration in plan.
# 
# CHG is a simple container, which bundles several project files
# together.
# 
# Written and tested by Vladimir Shulzhitskiy, 2017
class MonomakhSaprChg < Kaitai::Struct::Struct
  def initialize(_io, _parent = nil, _root = self)
    super(_io, _parent, _root)
    _read
  end

  def _read
    @title = (@_io.read_bytes(10)).force_encoding("ascii")
    @ent = []
    i = 0
    while not @_io.eof?
      @ent << Block.new(@_io, self, @_root)
      i += 1
    end
    self
  end
  class Block < Kaitai::Struct::Struct
    def initialize(_io, _parent = nil, _root = self)
      super(_io, _parent, _root)
      _read
    end

    def _read
      @header = (@_io.read_bytes(13)).force_encoding("ascii")
      @file_size = @_io.read_u8le
      @file = @_io.read_bytes(file_size)
      self
    end
    attr_reader :header
    attr_reader :file_size
    attr_reader :file
  end
  attr_reader :title
  attr_reader :ent
end