Пример #1
0
        public DeflaterEngine(DeflaterPending pending)
        {
            this.pending = pending;
            huffman      = new DeflaterHuffman(pending);
            adler        = new Adler32();

            window = new byte[2 * WSIZE];
            head   = new short[HASH_SIZE];
            prev   = new short[WSIZE];

            /* We start at index 1, to avoid a implementation deficiency, that
             * we cannot build a repeat pattern at index 0.
             */
            blockStart = strstart = 1;
        }
Пример #2
0
        /// <summary>
        /// Creates a new deflater with given compression level.
        /// </summary>
        /// <param name="lvl">
        /// the compression level, a value between NO_COMPRESSION
        /// and BEST_COMPRESSION.
        /// </param>
        /// <param name="nowrap">
        /// true, if we should suppress the deflate header at the
        /// beginning and the adler checksum at the end of the output.  This is
        /// useful for the GZIP format.
        /// </param>
        /// <exception cref="System.ArgumentOutOfRangeException">if lvl is out of range.</exception>
        public Deflater(int lvl, bool nowrap)
        {
            if (lvl == DEFAULT_COMPRESSION)
            {
                lvl = 6;
            }
            else if (lvl < NO_COMPRESSION || lvl > BEST_COMPRESSION)
            {
                throw new ArgumentOutOfRangeException("lvl");
            }

            pending       = new DeflaterPending();
            engine        = new DeflaterEngine(pending);
            this.noHeader = nowrap;
            SetStrategy(DeflateStrategy.Default);
            SetLevel(lvl);
            Reset();
        }