Function copyFile

Core/MemoryFile_Win32.cpp:544–571

copy to a temp file then rename it this is the best we can do on Win32

// copy to a temp file then rename it
// this is the best we can do on Win32
bool copyFile(const MMKVPath_t &srcPath, const MMKVPath_t &dstPath) {
    auto pair = createUniqueTempFile(L"MMKV");
    auto tmpFD = pair.second;
    auto &tmpPath = pair.first;
    if (tmpFD == INVALID_HANDLE_VALUE) {
        return false;
    }

    bool renamed = false;
    if (copyFileContent(srcPath, tmpFD, false)) {
        const auto &utf8SrcPath = MMKVPath_t2String(srcPath);
        const auto &utf8TmpPath = MMKVPath_t2String(tmpPath);
        MMKVInfo("copied file [%s] to [%s]", utf8SrcPath.c_str(), utf8TmpPath.c_str());
        CloseHandle(tmpFD);
        renamed = tryAtomicRename(tmpPath.c_str(), dstPath.c_str());
        if (renamed) {
            const auto &utf8DstPath = MMKVPath_t2String(dstPath);
            MMKVInfo("copyfile [%s] to [%s] finish.", utf8SrcPath.c_str(), utf8DstPath.c_str());
        }
    } else {
        CloseHandle(tmpFD);
    }

    if (!renamed) {
        DeleteFile(tmpPath.c_str());
    }
    return renamed;
}

bool copyFileContent(const MMKVPath_t &srcPath, const MMKVPath_t &dstPath) {
    File dstFile(dstPath, OpenFlag::WriteOnly | OpenFlag::Create | OpenFlag::Truncate);