Qt UTF-8 arguments, Windows

main.cpp

#include <QCoreApplication>
#include <QDebug>

#include <windows.h>
#include <shellapi.h>

int utf8Main(int argc, char *argv[])
{
    QStringList utf8Args;
    for (int i = 0; i != argc; ++i)
        utf8Args.append(QString::fromUtf8(argv[i]));

    qDebug() << "utf8Args" << utf8Args;

    QCoreApplication app(argc, argv); // do not use a.arguments(); because it contains broken unicode

    return 0;
}

int argsToUtf8(std::function<int(int, char *[])> utf8main_callback)
{
    auto wideToMulti = [](unsigned int codePage, const wchar_t *aw) -> char *
    {
        const int required = WideCharToMultiByte(codePage, 0, aw, -1, nullptr, 0, nullptr, nullptr);
        char *result = new char[required];
        WideCharToMultiByte(codePage, 0, aw, -1, result, required, nullptr, nullptr);
        return result;
    };

    int argc = 0;
    wchar_t **argvW = CommandLineToArgvW(GetCommandLineW(), &argc);
    if (argvW == nullptr)
        return -1;

    char **argv = new char *[argc + 1];
    for (int i = 0; i != argc; ++i)
        argv[i] = wideToMulti(CP_UTF8, argvW[i]);

    argv[argc] = nullptr;
    LocalFree(argvW);

    const int exitCode = utf8main_callback(argc, argv);

    for (int i = 0; (i != argc) && (argv[i] != nullptr); ++i)
        delete [] argv[i];
    delete [] argv;

    return exitCode;
}

int main(int argc, char *argv[])
{
    Q_UNUSED(argc);
    Q_UNUSED(argv);

    return argsToUtf8(utf8Main);
}

https://github.com/FRex/blawmain#readme

https://github.com/qt/qtbase/blob/9db7cc79a26ced4997277b5c206ca15949133240/src/entrypoint/qtentrypoint_win.cpp

for output https://stackoverflow.com/questions/4766301/windows-console-and-qt-unicode-text