class testDll(object):
def __init__(self):
self.dll = CDLL("testa.dll")
1、python传入指针,DLL将指针赋值,传回python:
1.1python部分代码:
def transToHexFromBytearray(dataarray):
'''从bytearray转换成HEX'''
return "".join(["%.2X" % c for c in dataarray])
def transToBytearrayFromHex(hexStr, length=None):
'''从HEX字符串转换成bytearray'''
return bytes.fromhex(hexStr)
def testa(self,testInt, testStr):
testStr = transToBytearrayFromHex(testStr)#输入
returnInt = c_int() #返回
returnData = create_string_buffer(256) #创建返回固定大小的字符缓存
ret = self.dll.TransferChannel(testStr, testInt, byref(returnInt),byref(returnData))
return ret, returnInt, transToHexFromBytearray(returnData.raw)
1.2C语言接口代码:
extern "C" testa int testa(char *testStr, int testInt, int &returnInt, char *returnData);1.3调用:
#1.加载dll testDll=testDll() #调用方法 ret, returnInt,returnData=tstDll.testa(1,"AABBCC")2.传入空结构体并返回
2.1python部分代码:
class OemInfo(Structure):
_fields_ = [("oemId", c_char * 21),
("carType", c_char * 2)]
def getOemList(self):
msg = create_string_buffer(128)
lens = c_int(1)
oemInfo1 = OemInfo() # 初始化结构体
ret = self.dll.testStructure(byref(oemInfo1), byref(lens), byref(msg))
if (ret != 0):
print(str(msg.value))
return ret, None, None, None
return ret, oemInfo1, lens, msg
2.2C语言接口代码:
typedef struct _tag_OEM_INFO
{
char oemId[21];
char carType[2];
}OemInfo;
extern "C" testa int testStructure(OemInfo *arrOem, int &len, char* msg);
