Function CopyWCharToNFDChar

extern/nfd/nfd_win.cpp:726–740

allocs the space in outPath -- call NFDi_Free()

// allocs the space in outPath -- call NFDi_Free()
nfdresult_t CopyWCharToNFDChar(const nfdnchar_t* inStr, nfdu8char_t*& outStr) {
    int bytesNeeded = WideCharToMultiByte(CP_UTF8, 0, inStr, -1, nullptr, 0, nullptr, nullptr);
    assert(bytesNeeded);

    nfdu8char_t* tmp_outStr = NFDi_Malloc<nfdu8char_t>(sizeof(nfdu8char_t) * bytesNeeded);
    if (!tmp_outStr) {
        return NFD_ERROR;
    }

    int ret = WideCharToMultiByte(CP_UTF8, 0, inStr, -1, tmp_outStr, bytesNeeded, nullptr, nullptr);
    assert(ret && ret == bytesNeeded);
    (void)ret;  // prevent warning in release build
    outStr = tmp_outStr;
    return NFD_OKAY;
}

struct FilterItem_Guard {
    nfdnfilteritem_t* data;