Method try_open_pack

utility/gdre_packed_source.cpp:305–519

}

bool GDREPackedSource::try_open_pack(const String &p_path, bool p_replace_files, uint64_t p_offset, const Vector<uint8_t> &p_decryption_key) {
	String ext = p_path.get_extension().to_lower();
	if (ext == "apk" || ext == "zip") {
		return false;
	}
	String pck_path = p_path.replace("_GDRE_a_really_dumb_hack", "");
	Ref<FileAccess> f = FileAccess::open(pck_path, FileAccess::READ);
	ERR_FAIL_COND_V_MSG(f.is_null(), false, "Failed to open pack file: " + pck_path);

	f->seek(p_offset);

	bool is_exe = false;
	uint32_t magic = f->get_32();
	bool suspect_magic = false;
	String non_standard_header;

	uint64_t pck_size = f->get_length();

	if (magic != PACK_HEADER_MAGIC) {
		if (ext == "pck" && is_magic_ascii(magic)) {
			suspect_magic = true;
			non_standard_header = get_magic_ascii(magic);
			WARN_PRINT("PCK has suspect magic: " + get_magic_ascii(magic));
		} else {
			// Loading with offset feature not supported for self contained exe files.
			if (p_offset != 0) {
				ERR_FAIL_V_MSG(false, "Loading self-contained executable with offset not supported.");
			}

			if (!seek_offset_from_exe(f, pck_path, pck_size)) {
				ERR_FAIL_COND_V_MSG(ext == "pck", false, "PCK header not found in pck file: " + pck_path);
				return false;
			}
			is_exe = true;
		}
	}

	int64_t pck_start_pos = f->get_position() - 4;
	uint64_t pck_end_pos = pck_start_pos + pck_size;

	uint32_t version = f->get_32();
	uint32_t ver_major = f->get_32();
	uint32_t ver_minor = f->get_32();
	uint32_t ver_patch = f->get_32(); // patch number, did not start getting set to anything other than 0 until 3.2

	if (version > CURRENT_PACK_FORMAT_VERSION) {
		ERR_FAIL_V_MSG(false, "Pack version unsupported: " + itos(version) + ". (engine version: " + itos(ver_major) + "." + itos(ver_minor) + "." + itos(ver_patch) + ")");
	}

	if (suspect_magic) {
		if (ver_major > GODOT_VERSION_MAJOR || (ver_major == 0)) {
			ERR_FAIL_V_MSG(false, "PCK ver_major is suspicious, not continuing: " + itos(version) + ". (engine version: " + itos(ver_major) + "." + itos(ver_minor) + "." + itos(ver_patch) + ")");
		}
	}

	uint32_t pack_flags = 0;
	uint64_t file_base = 0;