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
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.
All parsing code for Python generated by Kaitai Struct depends on the Python runtime library. You have to install it before you can parse data.
The Python runtime library can be installed from PyPI:
python3 -m pip install kaitaistructParse a local file and get structure in memory:
data = MonomakhSaprChg.from_file("path/to/local/file.chg")
Or parse structure from a bytes:
from kaitaistruct import KaitaiStream, BytesIO
raw = b"\x00\x01\x02..."
data = MonomakhSaprChg(KaitaiStream(BytesIO(raw)))
After that, one can get various attributes from the structure by invoking getter methods like:
data.title # => get title
# This is a generated file! Please edit source .ksy file and use kaitai-struct-compiler to rebuild
import kaitaistruct
from kaitaistruct import KaitaiStruct, KaitaiStream, BytesIO
if getattr(kaitaistruct, 'API_VERSION', (0, 9)) < (0, 9):
raise Exception("Incompatible Kaitai Struct Python API: 0.9 or later is required, but you have %s" % (kaitaistruct.__version__))
class MonomakhSaprChg(KaitaiStruct):
"""CHG is a container format file used by
[MONOMAKH-SAPR](https://www.liraland.com/mono/), 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
"""
def __init__(self, _io, _parent=None, _root=None):
self._io = _io
self._parent = _parent
self._root = _root if _root else self
self._read()
def _read(self):
self.title = (self._io.read_bytes(10)).decode(u"ascii")
self.ent = []
i = 0
while not self._io.is_eof():
self.ent.append(MonomakhSaprChg.Block(self._io, self, self._root))
i += 1
class Block(KaitaiStruct):
def __init__(self, _io, _parent=None, _root=None):
self._io = _io
self._parent = _parent
self._root = _root if _root else self
self._read()
def _read(self):
self.header = (self._io.read_bytes(13)).decode(u"ascii")
self.file_size = self._io.read_u8le()
self.file = self._io.read_bytes(self.file_size)