相关疑难解决方法(0)

这可能是一个愚蠢的问题,但我无法在文档或任何地方找到一个好的答案.

如果我使用struct来定义二进制结构,那么struct有两个对称的方法用于序列化和反序列化(打包和解包),但似乎ctypes没有直接的方法来执行此操作.这是我的解决方案,感觉不对:

from ctypes import *

class Example(Structure):
    _fields_ = [
        ("index", c_int),
        ("counter", c_int),
        ]

def Pack(ctype_instance):
    buf = string_at(byref(ctype_instance), sizeof(ctype_instance))
    return buf

def Unpack(ctype, buf):
    cstring = create_string_buffer(buf)
    ctype_instance = cast(pointer(cstring), POINTER(ctype)).contents
    return ctype_instance

if __name__ == "__main__":
    e = Example(12, 13)
    buf = Pack(e)
    e2 = Unpack(Example, buf)
    assert(e.index == e2.index)
    assert(e.counter == e2.counter)
    # note: for some reason e == e2 is False...