/// <summary> /// Construct instance with pending buffer /// </summary> /// <param name="pending">Pending buffer to use</param> /// > 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 an implementation deficiency, that // we cannot build a repeat pattern at index 0. blockStart = strstart = 1; }
/// <summary> /// Creates a new deflater with given compression level. /// </summary> /// <param name="level">the compression level, a value between NO_COMPRESSION /// and BEST_COMPRESSION.</param> /// <param name="noZlibHeaderOrFooter">true, if we should suppress the Zlib/RFC1950 header at the /// beginning and the adler checksum at the end of the output. This is /// useful for the GZIP/PKZIP formats.</param> /// <exception cref="ArgumentOutOfRangeException">level</exception> /// <exception cref="System.ArgumentOutOfRangeException">if lvl is out of range.</exception> public Deflater(int level, bool noZlibHeaderOrFooter) { if (level == DEFAULT_COMPRESSION) { level = 6; } else if (level < NO_COMPRESSION || level > BEST_COMPRESSION) { throw new ArgumentOutOfRangeException("level"); } pending = new DeflaterPending(); engine = new DeflaterEngine(pending); this.noZlibHeaderOrFooter = noZlibHeaderOrFooter; SetStrategy(DeflateStrategy.Default); SetLevel(level); Reset(); }