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Python-like 'struct' for Nim

License: MIT License

Nim 100.00%

struct structured-data parser packer unpacker python byte-order nim endian format-characters

struct.nim's Issues

Unexpected Output

Sorry, it's me again.

nim> import struct
nim> var a = unpack(">3I", "Hello World ")
nim> a
@[1214606444, 1864390511, 1919706144] == type seq[StructNode]
nim> pack(">3I", a)
Horld  == type string

Also it would be a useful feature to pass a seq[int32] to pack.

calcsize not exported

useful function

packing type 'byte' throws exception

Hi,

This code:

import struct
var packed_byte = pack("b", 5)

throws the following exception:

Traceback (most recent call last)
struct.nim(490)          test
struct.nim(438)          pack
struct.nim(326)          pack_char
system.nim(3535)         failedAssertImpl
system.nim(3527)         raiseAssert
system.nim(2637)         sysFatal
Error: unhandled exception: vars[ctx.offset].kind == StructChar  [AssertionError]

Unexpected Output

>>> from struct import unpack
>>> unpack(">3I", b"Hello World ")
(1214606444, 1864390511, 1919706144)

nim> from struct import unpack
nim> unpack(">3I", "Hello World ")
@[(kind: StructInt, num: 1214606444), (kind: StructInt, num: 1214606444), (kind: StructInt, num: 1214606444)] == type seq[StructNode]