Class Archive

Source/mpqapi.cpp:150–267

constexpr std::ios::off_type kMpqHashEntryOffset = kMpqBlockEntryOffset + kBlockEntrySize;

struct Archive {
	FStreamWrapper stream;
	std::string name;
	std::uintmax_t size;
	bool modified;
	bool exists;

#ifndef CAN_SEEKP_BEYOND_EOF
	std::streampos stream_begin;
#endif

	_HASHENTRY *sgpHashTbl;
	_BLOCKENTRY *sgpBlockTbl;

	bool Open(const char *name)
	{
		Close();
#ifdef _DEBUG
		SDL_Log("Opening %s", name);
#endif
		exists = FileExists(name);
		std::ios::openmode mode = std::ios::in | std::ios::out | std::ios::binary;
		if (exists) {
			if (GetFileSize(name, &size) == 0) {
				SDL_Log("GetFileSize(\"%s\") failed with \"%s\"", name, std::strerror(errno));
				return false;
#ifdef _DEBUG
			} else {
				SDL_Log("GetFileSize(\"%s\") = %" PRIuMAX, name, size);
#endif
			}
		} else {
			mode |= std::ios::trunc;
		}
		if (!stream.Open(name, mode)) {
			stream.Close();
			return false;
		}
		modified = !exists;

		this->name = name;
		return true;
	}

	bool Close(bool clear_tables = true)
	{
		if (!stream.IsOpen())
			return true;
#ifdef _DEBUG
		SDL_Log("Closing %s", name.c_str());
#endif

		bool result = true;
		if (modified && !(stream.seekp(0, std::ios::beg) && WriteHeaderAndTables()))
			result = false;
		stream.Close();
		if (modified && result && size != 0) {
#ifdef _DEBUG