工作上需要用python调用dll解析码流输出到文件，如何调用dll很多博客都有描述，，请参考如下blog：如何调用请参考：WinDLL和CDLL的选择，请参考：但是如何将一串字符串当做字节码流传给dll的接口呢，请看本文档的代码：#encoding:utf-8”’Created on 2015年3月5日@author: Administrator”’import ctypes,stringif __name__ == "__main__": #两个字符代表一个字节的字符串码流 hexstring = ‘000c40808300000600080003404105001a00504f170a16e65b110748100bf664f01080001ff43748065805f070c040115264f01000005c0a00570220003103e5e03e11035758a6200b601404ef6523021e242ca040080402600400021f025d0104e0c1004300060064f0100000006440080064f0100183bcb000864001300060000607c0f4374806’ hexstring_len = len(hexstring) #接口原型：pLTEDllRnlcDecode(ubyte,uint,uint,ubyte*,ubyte,char*) dll = ctypes.CDLL(‘LTE_DE_000_110729.dll’) parser = dll.LTEDllRnlcDecode parser.argtypes = [ctypes.c_ubyte, ctypes.c_uint, ctypes.c_uint, ctypes.c_char_p, ctypes.c_uint, ctypes.c_char_p] parser.restypes = ctypes.c_void_p data_id = ctypes.c_ubyte() data_id.value = 0 msg_id = ctypes.c_uint() msg_id.value = 57612 data_len = ctypes.c_uint() data_len.value = hexstring_len / 2 reserved = ctypes.c_uint() reserved.value = 0 #将码流字符串按2字节转换为byte串 char_array = [‘0’]*data_len.value i = 0 j = 0 while i < hexstring_len: byte = string.atoi(hexstring[i:i+2],16) char_array[j] = chr(byte) i = i + 2 j = j + 1 print char_array ss = ”.join(char_array) #byte串转成接口需要的byte* data_buffer = ctypes.c_char_p() data_buffer.value = ss # for i in range(len(ss)):# char_array[i]=ord(ss[i])# print char_array #buffer = ctypes.POINTER(ctypes.c_ubyte) #buffer.value = outfile = ctypes.c_char_p( ) outfile.value = "out.txt" parser(data_id, msg_id, data_len,data_buffer,reserved,outfile)
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