【Qt源码笔记】万般皆是int main

/************************************************************************
#include "qt_windows.h"
#include "qbytearray.h"
#include "qstring.h"
#include "qvector.h"
#include <shlobj.h>
/*
  This file contains the code in the qtmain library for Windows.
  qtmain contains the Windows startup code and is required for
  linking to the Qt DLL.
  When a Windows application starts, the WinMain function is
  invoked.
*/
QT_USE_NAMESPACE
int qMain(int, char **);
extern "C" int main(int, char **);
/*
  WinMain() - Initializes Windows and calls user's startup function main().
  NOTE: WinMain() won't be called if the application was linked as a "console"
  application.
*/
// Convert a wchar_t to char string, equivalent to QString::toLocal8Bit()
// when passed CP_ACP.
static inline char *wideToMulti(int codePage, const wchar_t *aw)
{
    const int required = WideCharToMultiByte(codePage, 0, aw, -1, NULL, 0, NULL, NULL);
    char *result = new char[required];
    WideCharToMultiByte(codePage, 0, aw, -1, result, required, NULL, NULL);
    return result;
}
extern "C" int APIENTRY WinMain(HINSTANCE, HINSTANCE, LPSTR /*cmdParamarg*/, int /* cmdShow */)
{
    int argc;
    wchar_t **argvW = CommandLineToArgvW(GetCommandLineW(), &argc);
    if (!argvW)
        return -1;
    char **argv = new char *[argc + 1];
    for (int i = 0; i < argc; ++i)
        argv[i] = wideToMulti(CP_ACP, argvW[i]);
    argv[argc] = nullptr;
    LocalFree(argvW);
    const int exitCode = main(argc, argv);
    for (int i = 0; i < argc && argv[i]; ++i)
        delete [] argv[i];
    delete [] argv;
    return exitCode;
}