Method parse

src/openboardview/FileFormats/FZFile.cpp:218–488

}

void FZFile::parse(std::vector<char> &buf, const std::array<uint32_t, 44> &fzkey) {
	auto buffer_size = buf.size();
	char *saved_locale;
	float multiplier = 1.0f;
	saved_locale     = setlocale(LC_NUMERIC, "C"); // Use '.' as delimiter for strtod

	if (check_fz_key(fzkey)) {
		key = fzkey;
	} else if (check_fz_key(getBuiltinKey())) { // Try to fallback to built-in key
		key = getBuiltinKey();
	} else {
		valid = false;
		error_msg = getKeyErrorMsg();
		error_msg += fz_key_to_string(fzkey);
		return;
	}

	ENSURE_OR_FAIL(buffer_size > 4, error_msg, return);
	size_t file_buf_size = 3 * (1 + buffer_size);
	file_buf             = (char *)calloc(1, file_buf_size);
	ENSURE_OR_FAIL(file_buf != nullptr, error_msg, return);

	std::copy(buf.begin(), buf.end(), file_buf);
	file_buf[buffer_size] = 0;
	// This is for fixing degenerate utf8
	char *arena     = &file_buf[buffer_size + 1];
	char *arena_end = file_buf + file_buf_size - 1;
	*arena_end      = 0;

	/*
	 * Some non-encrypted, but zip-encoded files are popping up now and then.
	 *
	 * Thanks to piernov for noticing the starting byte sequence
	 *
	 * Attempt to decode using the decode() call and subsequently
	 * split the file to get the content.  If that fails, then try again
	 * without decoding.
	 */

	uint8_t s1 = file_buf[4];
	uint8_t s2 = file_buf[5];
	if (!((s1 == 0x78) && ((s2 == 0x9C) || (s2 == 0xDA)))) {

		/*
		 * Doesn't have the zlib signature, so decode it first.
		 *
		 * 1 in ~2^16 chance of a false hit.
		 */
		FZFile::decode(file_buf, buffer_size); // RC6 decryption
		                                       // fprintf(stderr,"FZFile:Decoded\n");
	}

	size_t content_size = 0;
	size_t descr_size   = 0;
	char *descr;
	char *content = FZFile::split(file_buf, buffer_size, content_size, descr, descr_size); // then split it

	/*