C + + Call Python series (1): struct as entry and return structure

Recently you are planning to use python as a test case for functional testing and stress testing of game servers;

Because the server is written in C + +, the TCP protocol, the current architecture is intended to use the python constructs the structure, transmits to the C + + layer to send the socket to the game server, the response message is then referred to Python for verification;

Begin:

The first is the C + + call Python layer needs to get through;

Fortunately, Python has its own set of libraries that provide C/s for calls;

Below I put the code, with the Vs2013,python 2.7

1 //python_c++.cpp: Defines the entry point of the console application. 2 //3 4#include"stdafx.h"5#include <Python.h>6 #pragmaComment (lib, "Ws2_32.lib")7 8 int_tmain (intARGC, _tchar*argv[])9 {Ten     //Initialize Python One py_initialize (); A     //Check if initialization is successful -     if(!py_isinitialized ()) { -         return-1; the     } -     //Add current Path -     //runs the input string directly as Python code, returning 0 -     //indicates success, 1 indicates an error. Most of the time the error is due to a syntax error in the string.  +Pyrun_simplestring ("Import SYS"); -     intresult = Pyrun_simplestring ("print ('----------import sys-------')"); +     if(result!=-1){ Aprintf"Test Pyhon ok!\n\n"); at     } -      -Pyrun_simplestring ("sys.path.append ('./')"); -  -     //load a script named Pytest -Pyobject *pname = pybytes_fromstring ("pytest"); inPyobject *pmodule =Pyimport_import (pName); -     if(!pmodule) { toprintf"can ' t find pytest.py"); + GetChar (); -         return-1; the     } *  $Pyobject *pdict =pymodule_getdict (pmodule);Panax Notoginseng     if(!pdict) { - GetChar (); the         return-1; +     } A  the     //The following is a find function test and execute test +Pyobject *pfunc = pydict_getitemstring (Pdict,"test2"); -     if(!pfunc | |!Pycallable_check (PFunc)) { $printf"can ' t find function [Test2]"); $ GetChar (); -         return-1; -     } the  -typedefstructHeader_ {Wuyi         intbuf1; the         intbuf2; -         Charbuf3[ One]; Wu         intBuf4; - }header; About  $     //Create a struct body - header input; -memset (&input,0,sizeof(input)); -INPUT.BUF1 =1; AINPUT.BUF2 =2; +INPUT.BUF4 =3; thestrcpy_s (INPUT.BUF3,"Kjac"); -      $     //packaged into byte* the     Char* Byinput =New Char(sizeof(input)); thememcpy (Byinput, &input,sizeof(input)); the  the     //Request a Python entry -Pyobject *pargs = Pytuple_new (1); in     //assigns a value to the Python entry; s represents the char* format, #代表传入指定长度 thePytuple_setitem (PArgs,0, Py_buildvalue ("s#", Byinput,sizeof(input))); the  About     //Execute function thePyobject *presult =Pyobject_callobject (PFunc, PArgs); the  the     Char*pRsp; +     //Get return value -Pyarg_parse (PResult,"s", &pRsp); the Bayi     //turn into a structural body theheader* PSTRSP = (header*) pRsp; theprintf"\ n-----------C + + layer receives a PY return: buf1:%d,buf2:%d,buf3:%s,buf4:%d\n",  -PSTRSP-&GT;BUF1, Pstrsp->buf2, PSTRSP-&GT;BUF3, pstrsp->buf4); -  the     //Release the Py_decref (pName); the Py_decref (PArgs); the Py_decref (pmodule); -  the     //Close Python the py_finalize (); the GetChar ();94     return 0; the}

The following is the Python code

1 Importstruct2 3 defTest (a):4     Print("----------------------------python 1-----------------------")5ret = Struct.unpack ('Ii11si', a)6     Print("----------------------------python deal-----------------------")7     Print("--------------------Python receive C + + struct:")8     Print("Begin Unpack:")9     Print("")Ten     Print(ret) OneBUF1 = ret[0] + 1 ABUF2 = ret[1] + 1 -BUF4 = ret[3] + 1 -     Print("--------------------begin pack data and begin send to C + +") the     Print("") -Bin_buf_all = Struct.pack ('Ii11si', Buf1, Buf2,"DFDS", BUF4) -     Print("----------------------------python End-----------------------") -     returnBin_buf_all

The following is attached to VS2013 's Engineering property modification

Set include and libs paths for Python projects

Next, you can compile the output;

----------Import sys-------Test pyhon OK!----------------------------python 1------------------------------------- --------------python deal-------------------------------------------python receive C + + Struct:begin Unpack: (1, 2, ' Kjac\x00\xfe\xfe\xfe\xfe\xfe\xfe ', 3)--------------------begin pack data and begin send to C + +------------------------ ----Python End----------------------------------C + + layer receives a PY return: Buf1:2,buf2:3,buf3:dfds,buf4:4

Now that C + + calls Python is done, here is the framework message between Python and C + + and the construction of the test code

C + + Call Python series (1): struct as entry and return structure