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Domain Specific Language(DSL) for parsing and mapping binary data to python objects

Project Description

Python package for mapping objects to binary data. It works with Python 2.7+

Installation

Binmapper is available from https://pypi.python.org/pypi/binmapper and can be installed using pip

pip install binmapper

Example usage

import binmapper
import textwrap

definition = u"""\
    bintype BinX:
        field: uint8
    bintype Bin:
        fieldX: BinX
    """
definition = textwrap.dedent(definition)
binmap = binmapper.compile(definition)
bin = binmap.Bin()
input = io.BytesIO("\x01")
bin.parse(input)
print(bin.fieldX.field)

Data types

Type Byte Size Description
uint8 1 Unsigned byte
uint16 2 Unsigned short
uint32 4 Unsigned short
sint8 1 Signed byte
sint16 2 Signed short
sint32 4 Signed word
float 4 Floating point with single-precision
string n String
array n Array

Common class template

bintype CLASS_NAME:
    FIELD_NAME : FIELD_TYPE &FIELD_ATTRIBUTE
    ...
    &CLASS_ATTRIBUTE = CLASS_ATTRIBUTE_VALUE
    ...
    &LET_FIELD_NAME = EXPRESSION
    ...

Fields

Byteorder

Value Description
littlendian Increasing numeric significance with increasing memory addresses
bigendian Decreasing numeric significance with increasing memory addresses

Byteorder can be specified 3-way

  • Field attribute

    field: uint8 &byteorder=littlendian

    Apply only to field

  • BinType attribute

    :::python
    field: uint8
    &byteorder=littlendian
    

    Apply to all fields in BinType, except having attribute byteorder

  • Parse argument

    :::python
    bin.parse(input, byteorder='littlendian')
    

    Apply to all parsed data, except having attribute byteorder or BinType byteorder

Byteorder apply order:

`field byteorder > class byteorder > parse byteorder`

Class Usage

Array Usage

String Usage

Let Field Usage

Change elements in runtime

Release History

Release History

This version
History Node

0.1a5

History Node

0.1a4

History Node

0.1a3

History Node

0.1a2

History Node

0.1a1

History Node

0.1a0

Download Files

Download Files

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File Name & Checksum SHA256 Checksum Help Version File Type Upload Date
binmapper-0.1a5.zip (50.5 kB) Copy SHA256 Checksum SHA256 Source Jan 17, 2016

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