c
SSIZE_T Stream_Write_UTF16_String_From_UTF8(wStream* s, size_t dlen, const char* src, size_t length, BOOL fill)
{
    // ... (existing code)

    if (!src)  // Added check
        return 0; // Or another appropriate error handling mechanism

    SSIZE_T rc = ConvertUtf8NToWChar(src, length, str, dlen);
    // ... (rest of the function)
}
