Debug C++ Runtime Component in a WP8 project

Question

I've tried a lot of solutions, but none of them is working.

• printf("Test : %d", 123);
• std::cout << "Test" << 123 << std::endl;
• ...

Actually I've setup my project's debugger like this, I'm able to write in the console using OutputDebugStringA("Test"); but this function doesn't accept more than one parameter.

How can I print something like this : ("Test : %d", 123)?

Answer 1

I've finally found this solution (here and here) :

Debug.cpp:

#pragma once

#include "pch.h"
#define BUFFER_LENGTH 1024

//char* to wchar_t*
const wchar_t *GetWC(const char *c)
{
    const size_t cSize = strlen(c) + 1;
    wchar_t* wc = new wchar_t[cSize];
    mbstowcs(wc, c, cSize);

    return wc;
}

void Debug::Log(const char *format, ...)
{
    char buffer[BUFFER_LENGTH];
    va_list args;
    va_start(args, format);
    vsnprintf(buffer, BUFFER_LENGTH, format, args);
    va_end(args);
    buffer[BUFFER_LENGTH - 1] = '\0'; //prevent buffer overflow
    OutputDebugString(GetWC(buffer));
}

Debug.h:

class Debug{
public:
    static void Log(const char *format, ...);
};

We can use it like printf function:

Debug::Log("Test : %d", 123);