/// <exception cref="System.IO.IOException"></exception> public override void Write(byte[] b, int off, int len) { if (len == 0) { return; } int err; z.next_in = b; z.next_in_index = off; z.avail_in = len; do { z.next_out = buf; z.next_out_index = 0; z.avail_out = bufsize; if (compress) { err = z.Deflate(flush); } else { err = z.Inflate(flush); } if (err != JZlib.Z_OK) { throw new ZStreamException((compress ? "de" : "in") + "flating: " + z.msg); } @out.Write(buf, 0, bufsize - z.avail_out); }while (z.avail_in > 0 || z.avail_out == 0); }
/// <exception cref="System.IO.IOException"></exception> public override int Read(byte[] b, int off, int len) { if (len == 0) { return(0); } int err; z.next_out = b; z.next_out_index = off; z.avail_out = len; do { if ((z.avail_in == 0) && (!nomoreinput)) { // if buffer is empty and more input is avaiable, refill it z.next_in_index = 0; z.avail_in = @in.Read(buf, 0, bufsize); //(bufsize<z.avail_out ? bufsize : z.avail_out)); if (z.avail_in == -1) { z.avail_in = 0; nomoreinput = true; } } if (compress) { err = z.Deflate(flush); } else { err = z.Inflate(flush); } if (nomoreinput && (err == JZlib.Z_BUF_ERROR)) { return(-1); } if (err != JZlib.Z_OK && err != JZlib.Z_STREAM_END) { throw new ZStreamException((compress ? "de" : "in") + "flating: " + z.msg); } if ((nomoreinput || err == JZlib.Z_STREAM_END) && (z.avail_out == len)) { return(-1); } }while (z.avail_out == len && err == JZlib.Z_OK); //System.err.print("("+(len-z.avail_out)+")"); return(len - z.avail_out); }
internal int DeflateParams(ZStream strm, int _level, int _strategy) { int err = Z_OK; if (_level == Z_DEFAULT_COMPRESSION) { _level = 6; } if (_level < 0 || _level > 9 || _strategy < 0 || _strategy > Z_HUFFMAN_ONLY) { return Z_STREAM_ERROR; } if (config_table[level].func != config_table[_level].func && strm.total_in != 0) { // Flush the last buffer: err = strm.Deflate(Z_PARTIAL_FLUSH); } if (level != _level) { level = _level; max_lazy_match = config_table[level].max_lazy; good_match = config_table[level].good_length; nice_match = config_table[level].nice_length; max_chain_length = config_table[level].max_chain; } strategy = _strategy; return err; }