Function wstr_to_utf8

3rdparty/openal/common/strutils.cpp:13–27

#include <windows.h>

std::string wstr_to_utf8(std::wstring_view wstr)
{
    std::string ret;

    int len{WideCharToMultiByte(CP_UTF8, 0, wstr.data(), static_cast<int>(wstr.length()), nullptr,
        0, nullptr, nullptr)};
    if(len > 0)
    {
        ret.resize(len);
        WideCharToMultiByte(CP_UTF8, 0, wstr.data(), static_cast<int>(wstr.length()), &ret[0], len,
            nullptr, nullptr);
    }

    return ret;
}

std::wstring utf8_to_wstr(std::string_view str)
{