j2me zip 压缩及解压，不支持gzip格式

/* -*-mode:java; c-basic-offset:2; -*- */ /**ATTENTION:This class is modified in respect to the original sources * */ /* Copyright (c) 2000,2001,2002,2003 ymnk, JCraft,Inc. All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. 3. The names of the authors may not be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JCRAFT, INC. OR ANY CONTRIBUTORS TO THIS SOFTWARE BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /* * This program is based on zlib-1.1.3, so all credit should go authors * Jean-loup Gailly(jloup@gzip.org) and Mark Adler(madler@alumni.caltech.edu) * and contributors of zlib. */ /* *Modified by Asoft ltd. at 2003 for running on J2ME platform *www.asoft.ru *Alexandre Rusev rusev@asoft.ru *Alexey Soloviev soloviev@asoft.ru */ package com.asoft.midp.jzlib; import com.asoft.midp.dynarray.*; public final class Deflate { private static final int DEBUG = 5; static final private int MAX_MEM_LEVEL = 9; static final private int Z_DEFAULT_COMPRESSION = -1; static final private int MAX_WBITS = 15; // 32K LZ77 window static final private int DEF_MEM_LEVEL = 8; static class Config { int good_length; // reduce lazy search above this match length int max_lazy; // do not perform lazy search above this match length int nice_length; // quit search above this match length int max_chain; int func; Config(int good_length, int max_lazy, int nice_length, int max_chain, int func) { this.good_length = good_length; this.max_lazy = max_lazy; this.nice_length = nice_length; this.max_chain = max_chain; this.func = func; } } static final private int STORED = 0; static final private int FAST = 1; static final private int SLOW = 2; static final private Config[] config_table; static { config_table = new Config[10]; // good lazy nice chain config_table[0] = new Config(0, 0, 0, 0, STORED); config_table[1] = new Config(4, 4, 8, 4, FAST); config_table[2] = new Config(4, 5, 16, 8, FAST); config_table[3] = new Config(4, 6, 32, 32, FAST); config_table[4] = new Config(4, 4, 16, 16, SLOW); config_table[5] = new Config(8, 16, 32, 32, SLOW); config_table[6] = new Config(8, 16, 128, 128, SLOW); config_table[7] = new Config(8, 32, 128, 256, SLOW); config_table[8] = new Config(32, 128, 258, 1024, SLOW); config_table[9] = new Config(32, 258, 258, 4096, SLOW); } static final private String[] z_errmsg = { "need dictionary", // Z_NEED_DICT 2 "stream end", // Z_STREAM_END 1 "", // Z_OK 0 "file error", // Z_ERRNO (-1) "stream error", // Z_STREAM_ERROR (-2) "data error", // Z_DATA_ERROR (-3) "insufficient memory", // Z_MEM_ERROR (-4) "buffer error", // Z_BUF_ERROR (-5) "incompatible version",// Z_VERSION_ERROR (-6) "" }; // block not completed, need more input or more output static final private int NeedMore = 0; // block flush performed static final private int BlockDone = 1; // finish started, need only more output at next deflate static final private int FinishStarted = 2; // finish done, accept no more input or output static final private int FinishDone = 3; // preset dictionary flag in zlib header static final private int PRESET_DICT = 0x20; static final private int Z_FILTERED = 1; static final private int Z_HUFFMAN_ONLY = 2; static final private int Z_DEFAULT_STRATEGY = 0; static final private int Z_NO_FLUSH = 0; static final private int Z_PARTIAL_FLUSH = 1; static final private int Z_SYNC_FLUSH = 2; static final private int Z_FULL_FLUSH = 3; static final private int Z_FINISH = 4; static final private int Z_OK = 0; static final private int Z_STREAM_END = 1; static final private int Z_NEED_DICT = 2; static final private int Z_ERRNO = -1; static final private int Z_STREAM_ERROR = -2; static final private int Z_DATA_ERROR = -3; static final private int Z_MEM_ERROR = -4; static final private int Z_BUF_ERROR = -5; static final private int Z_VERSION_ERROR = -6; static final private int INIT_STATE = 42; static final private int BUSY_STATE = 113; static final private int FINISH_STATE = 666; // The deflate compression method static final private int Z_DEFLATED = 8; static final private int STORED_BLOCK = 0; static final private int STATIC_TREES = 1; static final private int DYN_TREES = 2; // The three kinds of block type static final private int Z_BINARY = 0; static final private int Z_ASCII = 1; static final private int Z_UNKNOWN = 2; static final private int Buf_size = 8 * 2; // repeat previous bit length 3-6 times (2 bits of repeat count) static final private int REP_3_6 = 16; // repeat a zero length 3-10 times (3 bits of repeat count) static final private int REPZ_3_10 = 17; // repeat a zero length 11-138 times (7 bits of repeat count) static final private int REPZ_11_138 = 18; static final private int MIN_MATCH = 3; static final private int MAX_MATCH = 258; static final private int MIN_LOOKAHEAD = (MAX_MATCH + MIN_MATCH + 1); static final private int MAX_BITS = 15; static final private int D_CODES = 30; static final private int BL_CODES = 19; static final private int LENGTH_CODES = 29; static final private int LITERALS = 256; static final private int L_CODES = (LITERALS + 1 + LENGTH_CODES); static final private int HEAP_SIZE = (2 * L_CODES + 1); static final private int END_BLOCK = 256; ZStream strm; // pointer back to this zlib stream int status; // as the name implies byte_array pending_buf; // output still pending int pending_buf_size; // size of pending_buf int pending_out; // next pending byte to output to the stream int pending; // nb of bytes in the pending buffer int noheader; // suppress zlib header and adler32 byte data_type; // UNKNOWN, BINARY or ASCII byte method; // STORED (for zip only) or DEFLATED int last_flush; // value of flush param for previous deflate call int w_size; // LZ77 window size (32K by default) int w_bits; // log2(w_size) (8..16) int w_mask;