Exemplo n.º 1
0
 //============================================================
 // <T>加载压缩文件。</T>
 //
 // @param fileName 文件名称
 //============================================================
 public void LoadCompress(string fileName)
 {
     LoadFile(fileName);
     _position    = 0;
     _compressCd  = ERsCompress.ToString(ReadUint8());
     _dataLength  = ReadInt32();
     _vertifyCode = ReadInt32();
     _blockCount  = ReadInt32();
 }
Exemplo n.º 2
0
        //============================================================
        // <T>压缩字节数据。</T>
        //
        // @return 字节数据
        //============================================================
        public byte[] CompressBytes()
        {
            byte[] data = null;
            // Deflate压缩
            string compressCd = _compressCd;

            switch (compressCd)
            {
            case ERsCompress.Deflate:
                using (FCompressFile file = new FCompressFile()) {
                    file.Append(_memory, 0, _length);
                    if (_blockSize > 0)
                    {
                        data = file.BlockCompress(_blockSize);
                    }
                    else
                    {
                        data = file.Compress();
                    }
                }
                break;

            case ERsCompress.Lzma:
                using (FLzmaFile file = new FLzmaFile()) {
                    file.Append(_memory, 0, _length);
                    if (_blockSize > 0)
                    {
                        data = file.BlockCompress(_blockSize);
                    }
                    else
                    {
                        data = file.Compress();
                    }
                }
                break;

            case ERsCompress.LzmaAlchemy:
                using (FLzmaFile file = new FLzmaFile()) {
                    file.Append(_memory, 0, _length);
                    if (_blockSize > 0)
                    {
                        data = file.BlockCompressNative(_blockSize);
                    }
                    else
                    {
                        data = file.CompressNative();
                    }
                }
                break;
            }
            // 检查大小,如果压缩后更大,则不压缩数据
            if (data.Length > _length)
            {
                data       = ToArray();
                compressCd = ERsCompress.None;
            }
            // 计算效验码
            _vertifyCode = RByte.ComputeHash32(data, 0, data.Length);
            // 写入文件
            byte[] result = null;
            using (FByteStream stream = new FByteStream()) {
                // 写入信息
                stream.WriteUint8((byte)ERsCompress.Parse(compressCd));
                stream.WriteInt32(_length);
                stream.WriteInt32(_vertifyCode);
                stream.WriteInt32(_blockSize);
                // 写入数据
                if ((ERsCompress.None != compressCd) && (_blockSize > 0))
                {
                    stream.WriteBytes(data, 0, data.Length);
                }
                else
                {
                    stream.WriteInt32(1);
                    stream.WriteInt32(data.Length);
                    stream.WriteBytes(data, 0, data.Length);
                }
                result = stream.ToArray();
            }
            return(result);
        }