pargec generates C binary/protocol parsers

pargec generates C code for parsing binary structures (eg: protocol headers) from a Structure declaration like the following:

foo = Structure("foo_prot", [
    Field("field1", uint8, 6, FMT_BE_MSB),
    Field("field2", uint8, 4, FMT_BE_MSB),
    Field("field3", uint8, 6, FMT_BE_MSB),
])

Also pargec generates a python wrapper of the C code.