Method open

compat/resource_compat_binary.cpp:1143–1293

}

void ResourceLoaderCompatBinary::open(Ref<FileAccess> p_f, bool p_no_resources, bool p_keep_uuid_paths) {
	error = OK;

	f = p_f;
	uint8_t header[4];
	f->get_buffer(header, 4);
	if (header[0] == 'R' && header[1] == 'S' && header[2] == 'C' && header[3] == 'C') {
		// Compressed.
		Ref<FileAccessCompressed> fac;
		fac.instantiate();
		error = fac->open_after_magic(f);
		if (error != OK) {
			f.unref();
			ERR_FAIL_MSG(vformat("Failed to open binary resource file: '%s'.", local_path));
		}
		f = fac;
		is_compressed = true;
	} else if (header[0] != 'R' || header[1] != 'S' || header[2] != 'R' || header[3] != 'C') {
		// Not normal.
		error = ERR_FILE_UNRECOGNIZED;
		f.unref();
		ERR_FAIL_MSG(vformat("Unrecognized binary resource file: '%s'.", local_path));
	}

	bool big_endian = f->get_32();
	bool use_real64 = f->get_32();

	f->set_big_endian(big_endian != 0); //read big endian if saved as big endian

	ver_major = f->get_32();
	ver_minor = f->get_32();
	ver_format = f->get_32();

	stored_big_endian = big_endian;
	stored_use_real64 = use_real64;

	check_suspect_version();

	print_bl("big endian: " + itos(big_endian));
#ifdef BIG_ENDIAN_ENABLED
	print_bl("endian swap: " + itos(!big_endian));
#else
	print_bl("endian swap: " + itos(big_endian));
#endif
	print_bl("real64: " + itos(use_real64));
	print_bl("major: " + itos(ver_major));
	print_bl("minor: " + itos(ver_minor));
	print_bl("format: " + itos(ver_format));

	if (ver_format > FORMAT_VERSION || ver_major > GODOT_VERSION_MAJOR) {
		f.unref();
		ERR_FAIL_MSG(vformat("File '%s' can't be loaded, as it uses a format version (%d) or engine version (%d.%d) which are not supported by your engine version (%s).",
				local_path, ver_format, ver_major, ver_minor, VERSION_BRANCH));
	}

	type = get_unicode_string();

	print_bl("type: " + type);