test.h中定義結構體

test.h

#include <stdio.h>
#include <wchar.h>


#define ARRAY_NUMBER 20
#define STR_LEN 20


typedef struct _tag_Struct
{
int   number;
char* pChar;                              //窄字元字串
char  str[STR_LEN];                 //窄字元陣列
int   iArray[ARRAY_NUMBER];
}TMPSTRUCT;


extern "C"
{
__declspec(dllexport) int __cdecl test(wchar_t* a, int len);




__declspec(dllexport) TMPSTRUCT* __cdecl testStruct(TMPSTRUCT* a, int len);


};

test.cpp

#include "test.h"


__declspec(dllexport) int __cdecl test(wchar_t* a, int len)
{
printf("get [%S] len %d\r\n", a, len);
printf("hell test %s line %d \r\n", __FUNCTION__, __LINE__);


return 169;
}


__declspec(dllexport) TMPSTRUCT* __cdecl testStruct(TMPSTRUCT* a, int len)
{
int i = 0;


printf("num %d str %s \r\n", a->number, a->pChar);

for (i = 0; i < ARRAY_NUMBER; ++i)
{
printf("%d ", a->iArray[i]);
}
printf("\r\n");


for (i = 0; i < STR_LEN; ++i)
{
printf("[%x %c] ", a->str[i], a->str[i]);
}
printf("\r\n");


return a;
}

test.py

#coding=utf-8


from ctypes import *
import struct
import binascii


slen = 4


sBuf = 'aaaaaaaaaabbbbbbbbbbbbbb'
 
adll = cdll.LoadLibrary( 'pydll.dll' )


##傳入的引數是寬字元
adll.test(sBuf, slen);


ARRAY_NUMBER = 20;
STR_LEN = 20;
#define type
INTARRAY20 = c_int * ARRAY_NUMBER;
CHARARRAY20 = c_byte * STR_LEN;##不會給c_char*STR_LEN賦值，所以找了一個同樣大小的型別
#define struct
class StructTest(Structure):
    _fields_ = [
        ("number", c_int),
        ("pChar", c_wchar_p),
        ("str", CHARARRAY20),
        ("iArray", INTARRAY20)
               ]


#load dll and get the function object
dll = cdll.LoadLibrary('pydll.dll');
testStruct = dll.testStruct;


objectStruct = StructTest();
objectStruct.number = 1989;
objectStruct.pChar = c_wchar_p('today is a very beautify day');




print ("before set value");
print ("get %d pChar %s"%(objectStruct.number, objectStruct.pChar));




print (sizeof(objectStruct.str));
print (len(objectStruct.str));##如果不是c_byte而是c_char這裡的len的返回值是0，
print (len(objectStruct.iArray));


for i in range(0, len(objectStruct.str)):
objectStruct.str[i] = 65 + i;

print ("str value done");

for i in range(0, len(objectStruct.iArray)):
objectStruct.iArray[i] = i + 2;

#invoke api GetStructInfo
retStr = testStruct(pointer(objectStruct), 12);


#check result
print (objectStruct.number);
print (objectStruct.pChar);
for i,val in enumerate(objectStruct.iArray):
    print (val);



input("press enter to quit")