decode_base64
ssize_t decode_base64(char *out, const char *in, off_t length);
baselen = ::decode_base64(base, &res[4], baselen);
baselen = ::decode_base64(base, &res[4], baselen);
decodedSize = decode_base64(
decodedSize = decode_base64(buffer, pngImageDataBase64.String(), encodedSize);
return decode_base64(out, in, length);
: decode_base64(src, src, srcLen);
length = decode_base64(buffer.Get(), data.String(), data.Length());
return decode_base64(out, in, length);