annotate src/com/jcraft/jzlib/InfTree.java @ 239:f20a39b38f13

add host preference for fixed screen size
author Carl Byington <carl@five-ten-sg.com>
date Mon, 14 Jul 2014 10:20:07 -0700
parents 0ce5cc452d02
children 46c2115ae1c8
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /* -*-mode:java; c-basic-offset:2; indent-tabs-mode:nil -*- */
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2 /*
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3 Copyright (c) 2000,2001,2002,2003 ymnk, JCraft,Inc. All rights reserved.
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4
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5 Redistribution and use in source and binary forms, with or without
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6 modification, are permitted provided that the following conditions are met:
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7
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8 1. Redistributions of source code must retain the above copyright notice,
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9 this list of conditions and the following disclaimer.
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10
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11 2. Redistributions in binary form must reproduce the above copyright
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12 notice, this list of conditions and the following disclaimer in
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13 the documentation and/or other materials provided with the distribution.
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14
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15 3. The names of the authors may not be used to endorse or promote products
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16 derived from this software without specific prior written permission.
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17
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18 THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
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19 INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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20 FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JCRAFT,
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21 INC. OR ANY CONTRIBUTORS TO THIS SOFTWARE BE LIABLE FOR ANY DIRECT, INDIRECT,
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22 INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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23 LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
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24 OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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25 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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26 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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27 EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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28 */
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29 /*
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30 * This program is based on zlib-1.1.3, so all credit should go authors
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31 * Jean-loup Gailly(jloup@gzip.org) and Mark Adler(madler@alumni.caltech.edu)
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32 * and contributors of zlib.
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33 */
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34
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35 package com.jcraft.jzlib;
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36
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37 final class InfTree {
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38
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39 static final private int MANY = 1440;
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40
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41 static final private int Z_OK = 0;
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42 static final private int Z_STREAM_END = 1;
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43 static final private int Z_NEED_DICT = 2;
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44 static final private int Z_ERRNO = -1;
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45 static final private int Z_STREAM_ERROR = -2;
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46 static final private int Z_DATA_ERROR = -3;
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47 static final private int Z_MEM_ERROR = -4;
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48 static final private int Z_BUF_ERROR = -5;
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49 static final private int Z_VERSION_ERROR = -6;
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50
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51 static final int fixed_bl = 9;
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52 static final int fixed_bd = 5;
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53
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54 static final int[] fixed_tl = {
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55 96, 7, 256, 0, 8, 80, 0, 8, 16, 84, 8, 115,
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56 82, 7, 31, 0, 8, 112, 0, 8, 48, 0, 9, 192,
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57 80, 7, 10, 0, 8, 96, 0, 8, 32, 0, 9, 160,
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58 0, 8, 0, 0, 8, 128, 0, 8, 64, 0, 9, 224,
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59 80, 7, 6, 0, 8, 88, 0, 8, 24, 0, 9, 144,
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60 83, 7, 59, 0, 8, 120, 0, 8, 56, 0, 9, 208,
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61 81, 7, 17, 0, 8, 104, 0, 8, 40, 0, 9, 176,
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62 0, 8, 8, 0, 8, 136, 0, 8, 72, 0, 9, 240,
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63 80, 7, 4, 0, 8, 84, 0, 8, 20, 85, 8, 227,
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64 83, 7, 43, 0, 8, 116, 0, 8, 52, 0, 9, 200,
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65 81, 7, 13, 0, 8, 100, 0, 8, 36, 0, 9, 168,
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66 0, 8, 4, 0, 8, 132, 0, 8, 68, 0, 9, 232,
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67 80, 7, 8, 0, 8, 92, 0, 8, 28, 0, 9, 152,
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68 84, 7, 83, 0, 8, 124, 0, 8, 60, 0, 9, 216,
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69 82, 7, 23, 0, 8, 108, 0, 8, 44, 0, 9, 184,
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70 0, 8, 12, 0, 8, 140, 0, 8, 76, 0, 9, 248,
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71 80, 7, 3, 0, 8, 82, 0, 8, 18, 85, 8, 163,
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72 83, 7, 35, 0, 8, 114, 0, 8, 50, 0, 9, 196,
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73 81, 7, 11, 0, 8, 98, 0, 8, 34, 0, 9, 164,
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74 0, 8, 2, 0, 8, 130, 0, 8, 66, 0, 9, 228,
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75 80, 7, 7, 0, 8, 90, 0, 8, 26, 0, 9, 148,
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76 84, 7, 67, 0, 8, 122, 0, 8, 58, 0, 9, 212,
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77 82, 7, 19, 0, 8, 106, 0, 8, 42, 0, 9, 180,
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78 0, 8, 10, 0, 8, 138, 0, 8, 74, 0, 9, 244,
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79 80, 7, 5, 0, 8, 86, 0, 8, 22, 192, 8, 0,
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80 83, 7, 51, 0, 8, 118, 0, 8, 54, 0, 9, 204,
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81 81, 7, 15, 0, 8, 102, 0, 8, 38, 0, 9, 172,
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82 0, 8, 6, 0, 8, 134, 0, 8, 70, 0, 9, 236,
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83 80, 7, 9, 0, 8, 94, 0, 8, 30, 0, 9, 156,
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84 84, 7, 99, 0, 8, 126, 0, 8, 62, 0, 9, 220,
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85 82, 7, 27, 0, 8, 110, 0, 8, 46, 0, 9, 188,
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86 0, 8, 14, 0, 8, 142, 0, 8, 78, 0, 9, 252,
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87 96, 7, 256, 0, 8, 81, 0, 8, 17, 85, 8, 131,
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88 82, 7, 31, 0, 8, 113, 0, 8, 49, 0, 9, 194,
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89 80, 7, 10, 0, 8, 97, 0, 8, 33, 0, 9, 162,
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90 0, 8, 1, 0, 8, 129, 0, 8, 65, 0, 9, 226,
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91 80, 7, 6, 0, 8, 89, 0, 8, 25, 0, 9, 146,
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92 83, 7, 59, 0, 8, 121, 0, 8, 57, 0, 9, 210,
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93 81, 7, 17, 0, 8, 105, 0, 8, 41, 0, 9, 178,
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94 0, 8, 9, 0, 8, 137, 0, 8, 73, 0, 9, 242,
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95 80, 7, 4, 0, 8, 85, 0, 8, 21, 80, 8, 258,
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96 83, 7, 43, 0, 8, 117, 0, 8, 53, 0, 9, 202,
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97 81, 7, 13, 0, 8, 101, 0, 8, 37, 0, 9, 170,
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98 0, 8, 5, 0, 8, 133, 0, 8, 69, 0, 9, 234,
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99 80, 7, 8, 0, 8, 93, 0, 8, 29, 0, 9, 154,
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100 84, 7, 83, 0, 8, 125, 0, 8, 61, 0, 9, 218,
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101 82, 7, 23, 0, 8, 109, 0, 8, 45, 0, 9, 186,
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102 0, 8, 13, 0, 8, 141, 0, 8, 77, 0, 9, 250,
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103 80, 7, 3, 0, 8, 83, 0, 8, 19, 85, 8, 195,
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104 83, 7, 35, 0, 8, 115, 0, 8, 51, 0, 9, 198,
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105 81, 7, 11, 0, 8, 99, 0, 8, 35, 0, 9, 166,
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106 0, 8, 3, 0, 8, 131, 0, 8, 67, 0, 9, 230,
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107 80, 7, 7, 0, 8, 91, 0, 8, 27, 0, 9, 150,
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108 84, 7, 67, 0, 8, 123, 0, 8, 59, 0, 9, 214,
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109 82, 7, 19, 0, 8, 107, 0, 8, 43, 0, 9, 182,
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110 0, 8, 11, 0, 8, 139, 0, 8, 75, 0, 9, 246,
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111 80, 7, 5, 0, 8, 87, 0, 8, 23, 192, 8, 0,
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112 83, 7, 51, 0, 8, 119, 0, 8, 55, 0, 9, 206,
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113 81, 7, 15, 0, 8, 103, 0, 8, 39, 0, 9, 174,
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114 0, 8, 7, 0, 8, 135, 0, 8, 71, 0, 9, 238,
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parents:
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115 80, 7, 9, 0, 8, 95, 0, 8, 31, 0, 9, 158,
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116 84, 7, 99, 0, 8, 127, 0, 8, 63, 0, 9, 222,
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117 82, 7, 27, 0, 8, 111, 0, 8, 47, 0, 9, 190,
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118 0, 8, 15, 0, 8, 143, 0, 8, 79, 0, 9, 254,
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119 96, 7, 256, 0, 8, 80, 0, 8, 16, 84, 8, 115,
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120 82, 7, 31, 0, 8, 112, 0, 8, 48, 0, 9, 193,
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121
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122 80, 7, 10, 0, 8, 96, 0, 8, 32, 0, 9, 161,
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123 0, 8, 0, 0, 8, 128, 0, 8, 64, 0, 9, 225,
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Carl Byington <carl@five-ten-sg.com>
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124 80, 7, 6, 0, 8, 88, 0, 8, 24, 0, 9, 145,
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125 83, 7, 59, 0, 8, 120, 0, 8, 56, 0, 9, 209,
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126 81, 7, 17, 0, 8, 104, 0, 8, 40, 0, 9, 177,
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127 0, 8, 8, 0, 8, 136, 0, 8, 72, 0, 9, 241,
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128 80, 7, 4, 0, 8, 84, 0, 8, 20, 85, 8, 227,
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129 83, 7, 43, 0, 8, 116, 0, 8, 52, 0, 9, 201,
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130 81, 7, 13, 0, 8, 100, 0, 8, 36, 0, 9, 169,
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131 0, 8, 4, 0, 8, 132, 0, 8, 68, 0, 9, 233,
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132 80, 7, 8, 0, 8, 92, 0, 8, 28, 0, 9, 153,
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133 84, 7, 83, 0, 8, 124, 0, 8, 60, 0, 9, 217,
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134 82, 7, 23, 0, 8, 108, 0, 8, 44, 0, 9, 185,
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135 0, 8, 12, 0, 8, 140, 0, 8, 76, 0, 9, 249,
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136 80, 7, 3, 0, 8, 82, 0, 8, 18, 85, 8, 163,
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137 83, 7, 35, 0, 8, 114, 0, 8, 50, 0, 9, 197,
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138 81, 7, 11, 0, 8, 98, 0, 8, 34, 0, 9, 165,
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diff changeset
139 0, 8, 2, 0, 8, 130, 0, 8, 66, 0, 9, 229,
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parents:
diff changeset
140 80, 7, 7, 0, 8, 90, 0, 8, 26, 0, 9, 149,
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
141 84, 7, 67, 0, 8, 122, 0, 8, 58, 0, 9, 213,
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
142 82, 7, 19, 0, 8, 106, 0, 8, 42, 0, 9, 181,
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
143 0, 8, 10, 0, 8, 138, 0, 8, 74, 0, 9, 245,
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
144 80, 7, 5, 0, 8, 86, 0, 8, 22, 192, 8, 0,
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
145 83, 7, 51, 0, 8, 118, 0, 8, 54, 0, 9, 205,
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
146 81, 7, 15, 0, 8, 102, 0, 8, 38, 0, 9, 173,
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
147 0, 8, 6, 0, 8, 134, 0, 8, 70, 0, 9, 237,
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
148 80, 7, 9, 0, 8, 94, 0, 8, 30, 0, 9, 157,
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
149 84, 7, 99, 0, 8, 126, 0, 8, 62, 0, 9, 221,
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
150 82, 7, 27, 0, 8, 110, 0, 8, 46, 0, 9, 189,
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
151 0, 8, 14, 0, 8, 142, 0, 8, 78, 0, 9, 253,
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
152 96, 7, 256, 0, 8, 81, 0, 8, 17, 85, 8, 131,
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
153 82, 7, 31, 0, 8, 113, 0, 8, 49, 0, 9, 195,
0ce5cc452d02 initial version
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parents:
diff changeset
154 80, 7, 10, 0, 8, 97, 0, 8, 33, 0, 9, 163,
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
155 0, 8, 1, 0, 8, 129, 0, 8, 65, 0, 9, 227,
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
156 80, 7, 6, 0, 8, 89, 0, 8, 25, 0, 9, 147,
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
157 83, 7, 59, 0, 8, 121, 0, 8, 57, 0, 9, 211,
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
158 81, 7, 17, 0, 8, 105, 0, 8, 41, 0, 9, 179,
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
159 0, 8, 9, 0, 8, 137, 0, 8, 73, 0, 9, 243,
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
160 80, 7, 4, 0, 8, 85, 0, 8, 21, 80, 8, 258,
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
161 83, 7, 43, 0, 8, 117, 0, 8, 53, 0, 9, 203,
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
162 81, 7, 13, 0, 8, 101, 0, 8, 37, 0, 9, 171,
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
163 0, 8, 5, 0, 8, 133, 0, 8, 69, 0, 9, 235,
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
164 80, 7, 8, 0, 8, 93, 0, 8, 29, 0, 9, 155,
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
165 84, 7, 83, 0, 8, 125, 0, 8, 61, 0, 9, 219,
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
166 82, 7, 23, 0, 8, 109, 0, 8, 45, 0, 9, 187,
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
167 0, 8, 13, 0, 8, 141, 0, 8, 77, 0, 9, 251,
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
168 80, 7, 3, 0, 8, 83, 0, 8, 19, 85, 8, 195,
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
169 83, 7, 35, 0, 8, 115, 0, 8, 51, 0, 9, 199,
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
170 81, 7, 11, 0, 8, 99, 0, 8, 35, 0, 9, 167,
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diff changeset
171 0, 8, 3, 0, 8, 131, 0, 8, 67, 0, 9, 231,
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Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
172 80, 7, 7, 0, 8, 91, 0, 8, 27, 0, 9, 151,
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Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
173 84, 7, 67, 0, 8, 123, 0, 8, 59, 0, 9, 215,
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Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
174 82, 7, 19, 0, 8, 107, 0, 8, 43, 0, 9, 183,
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
175 0, 8, 11, 0, 8, 139, 0, 8, 75, 0, 9, 247,
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
176 80, 7, 5, 0, 8, 87, 0, 8, 23, 192, 8, 0,
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Carl Byington <carl@five-ten-sg.com>
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diff changeset
177 83, 7, 51, 0, 8, 119, 0, 8, 55, 0, 9, 207,
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Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
178 81, 7, 15, 0, 8, 103, 0, 8, 39, 0, 9, 175,
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
179 0, 8, 7, 0, 8, 135, 0, 8, 71, 0, 9, 239,
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
180 80, 7, 9, 0, 8, 95, 0, 8, 31, 0, 9, 159,
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
181 84, 7, 99, 0, 8, 127, 0, 8, 63, 0, 9, 223,
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
182 82, 7, 27, 0, 8, 111, 0, 8, 47, 0, 9, 191,
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
183 0, 8, 15, 0, 8, 143, 0, 8, 79, 0, 9, 255
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Carl Byington <carl@five-ten-sg.com>
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184 };
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Carl Byington <carl@five-ten-sg.com>
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diff changeset
185 static final int[] fixed_td = {
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diff changeset
186 80, 5, 1, 87, 5, 257, 83, 5, 17, 91, 5, 4097,
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diff changeset
187 81, 5, 5, 89, 5, 1025, 85, 5, 65, 93, 5, 16385,
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Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
188 80, 5, 3, 88, 5, 513, 84, 5, 33, 92, 5, 8193,
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parents:
diff changeset
189 82, 5, 9, 90, 5, 2049, 86, 5, 129, 192, 5, 24577,
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diff changeset
190 80, 5, 2, 87, 5, 385, 83, 5, 25, 91, 5, 6145,
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Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
191 81, 5, 7, 89, 5, 1537, 85, 5, 97, 93, 5, 24577,
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diff changeset
192 80, 5, 4, 88, 5, 769, 84, 5, 49, 92, 5, 12289,
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diff changeset
193 82, 5, 13, 90, 5, 3073, 86, 5, 193, 192, 5, 24577
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
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194 };
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Carl Byington <carl@five-ten-sg.com>
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195
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parents:
diff changeset
196 // Tables for deflate from PKZIP's appnote.txt.
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diff changeset
197 static final int[] cplens = { // Copy lengths for literal codes 257..285
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diff changeset
198 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 15, 17, 19, 23, 27, 31,
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Carl Byington <carl@five-ten-sg.com>
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diff changeset
199 35, 43, 51, 59, 67, 83, 99, 115, 131, 163, 195, 227, 258, 0, 0
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Carl Byington <carl@five-ten-sg.com>
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200 };
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
201
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Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
202 // see note #13 above about 258
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Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
203 static final int[] cplext = { // Extra bits for literal codes 257..285
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Carl Byington <carl@five-ten-sg.com>
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diff changeset
204 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2,
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diff changeset
205 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 0, 112, 112 // 112==invalid
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Carl Byington <carl@five-ten-sg.com>
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diff changeset
206 };
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
207
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Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
208 static final int[] cpdist = { // Copy offsets for distance codes 0..29
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
209 1, 2, 3, 4, 5, 7, 9, 13, 17, 25, 33, 49, 65, 97, 129, 193,
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Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
210 257, 385, 513, 769, 1025, 1537, 2049, 3073, 4097, 6145,
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
211 8193, 12289, 16385, 24577
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
212 };
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
213
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
214 static final int[] cpdext = { // Extra bits for distance codes
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Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
215 0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6,
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Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
216 7, 7, 8, 8, 9, 9, 10, 10, 11, 11,
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
217 12, 12, 13, 13
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
218 };
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
219
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
220 // If BMAX needs to be larger than 16, then h and x[] should be uLong.
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
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diff changeset
221 static final int BMAX = 15; // maximum bit length of any code
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
222
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Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
223 int[] hn = null; // hufts used in space
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Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
224 int[] v = null; // work area for huft_build
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
225 int[] c = null; // bit length count table
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
226 int[] r = null; // table entry for structure assignment
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Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
227 int[] u = null; // table stack
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
228 int[] x = null; // bit offsets, then code stack
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
229
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Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
230 private int huft_build(int[] b, // code lengths in bits (all assumed <= BMAX)
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
231 int bindex,
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
232 int n, // number of codes (assumed <= 288)
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
233 int s, // number of simple-valued codes (0..s-1)
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
234 int[] d, // list of base values for non-simple codes
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
235 int[] e, // list of extra bits for non-simple codes
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
236 int[] t, // result: starting table
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
237 int[] m, // maximum lookup bits, returns actual
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
238 int[] hp,// space for trees
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
239 int[] hn,// hufts used in space
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
240 int[] v // working area: values in order of bit length
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
241 ) {
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
242 // Given a list of code lengths and a maximum table size, make a set of
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
243 // tables to decode that set of codes. Return Z_OK on success, Z_BUF_ERROR
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
244 // if the given code set is incomplete (the tables are still built in this
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
245 // case), Z_DATA_ERROR if the input is invalid (an over-subscribed set of
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
246 // lengths), or Z_MEM_ERROR if not enough memory.
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
247 int a; // counter for codes of length k
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
248 int f; // i repeats in table every f entries
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
249 int g; // maximum code length
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
250 int h; // table level
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
251 int i; // counter, current code
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
252 int j; // counter
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
253 int k; // number of bits in current code
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
254 int l; // bits per table (returned in m)
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
255 int mask; // (1 << w) - 1, to avoid cc -O bug on HP
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
256 int p; // pointer into c[], b[], or v[]
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
257 int q; // points to current table
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
258 int w; // bits before this table == (l * h)
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
259 int xp; // pointer into x
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
260 int y; // number of dummy codes added
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
261 int z; // number of entries in current table
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
262 // Generate counts for each bit length
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
263 p = 0; i = n;
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
264
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
265 do {
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
266 c[b[bindex + p]]++; p++; i--; // assume all entries <= BMAX
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
267 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
268 while (i != 0);
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
269
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
270 if (c[0] == n) { // null input--all zero length codes
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
271 t[0] = -1;
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
272 m[0] = 0;
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
273 return Z_OK;
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
274 }
0ce5cc452d02 initial version
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parents:
diff changeset
275
0ce5cc452d02 initial version
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parents:
diff changeset
276 // Find minimum and maximum length, bound *m by those
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Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
277 l = m[0];
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
278
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
279 for (j = 1; j <= BMAX; j++)
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Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
280 if (c[j] != 0) break;
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
281
0ce5cc452d02 initial version
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parents:
diff changeset
282 k = j; // minimum code length
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Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
283
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
284 if (l < j) {
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
285 l = j;
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
286 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
287
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
288 for (i = BMAX; i != 0; i--) {
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
289 if (c[i] != 0) break;
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
290 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
291
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
292 g = i; // maximum code length
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
293
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
294 if (l > i) {
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
295 l = i;
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
296 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
297
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
298 m[0] = l;
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
299
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
300 // Adjust last length count to fill out codes, if needed
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
301 for (y = 1 << j; j < i; j++, y <<= 1) {
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
302 if ((y -= c[j]) < 0) {
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
303 return Z_DATA_ERROR;
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
304 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
305 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
306
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
307 if ((y -= c[i]) < 0) {
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
308 return Z_DATA_ERROR;
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
309 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
310
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
311 c[i] += y;
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
312 // Generate starting offsets into the value table for each length
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
313 x[1] = j = 0;
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
314 p = 1; xp = 2;
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
315
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
316 while (--i != 0) { // note that i == g from above
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
317 x[xp] = (j += c[p]);
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
318 xp++;
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
319 p++;
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
320 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
321
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
322 // Make a table of values in order of bit lengths
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
323 i = 0; p = 0;
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
324
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
325 do {
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
326 if ((j = b[bindex + p]) != 0) {
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
327 v[x[j]++] = i;
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
328 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
329
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
330 p++;
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
331 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
332 while (++i < n);
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
333
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
334 n = x[g]; // set n to length of v
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
335 // Generate the Huffman codes and for each, make the table entries
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
336 x[0] = i = 0; // first Huffman code is zero
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
337 p = 0; // grab values in bit order
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
338 h = -1; // no tables yet--level -1
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
339 w = -l; // bits decoded == (l * h)
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
340 u[0] = 0; // just to keep compilers happy
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
341 q = 0; // ditto
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
342 z = 0; // ditto
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
343
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
344 // go through the bit lengths (k already is bits in shortest code)
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
345 for (; k <= g; k++) {
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
346 a = c[k];
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
347
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
348 while (a-- != 0) {
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
349 // here i is the Huffman code of length k bits for value *p
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
350 // make tables up to required level
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
351 while (k > w + l) {
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
352 h++;
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
353 w += l; // previous table always l bits
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
354 // compute minimum size table less than or equal to l bits
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
355 z = g - w;
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
356 z = (z > l) ? l : z; // table size upper limit
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
357
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
358 if ((f = 1 << (j = k - w)) > a + 1) { // try a k-w bit table
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
359 // too few codes for k-w bit table
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
360 f -= a + 1; // deduct codes from patterns left
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
361 xp = k;
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
362
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
363 if (j < z) {
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
364 while (++j < z) { // try smaller tables up to z bits
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
365 if ((f <<= 1) <= c[++xp])
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
366 break; // enough codes to use up j bits
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
367
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
368 f -= c[xp]; // else deduct codes from patterns
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
369 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
370 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
371 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
372
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
373 z = 1 << j; // table entries for j-bit table
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
374
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
375 // allocate new table
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
376 if (hn[0] + z > MANY) { // (note: doesn't matter for fixed)
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
377 return Z_DATA_ERROR; // overflow of MANY
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
378 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
379
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
380 u[h] = q = /*hp+*/ hn[0]; // DEBUG
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
381 hn[0] += z;
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
382
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
383 // connect to last table, if there is one
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
384 if (h != 0) {
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
385 x[h] = i; // save pattern for backing up
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
386 r[0] = (byte)j; // bits in this table
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
387 r[1] = (byte)l; // bits to dump before this table
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
388 j = i >>> (w - l);
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
389 r[2] = (int)(q - u[h - 1] - j); // offset to this table
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
390 System.arraycopy(r, 0, hp, (u[h - 1] + j) * 3, 3); // connect to last table
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
391 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
392 else {
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
393 t[0] = q; // first table is returned result
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
394 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
395 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
396
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
397 // set up table entry in r
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
398 r[1] = (byte)(k - w);
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
399
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
400 if (p >= n) {
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
401 r[0] = 128 + 64; // out of values--invalid code
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
402 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
403 else if (v[p] < s) {
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
404 r[0] = (byte)(v[p] < 256 ? 0 : 32 + 64); // 256 is end-of-block
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
405 r[2] = v[p++]; // simple code is just the value
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
406 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
407 else {
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
408 r[0] = (byte)(e[v[p] - s] + 16 + 64); // non-simple--look up in lists
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
409 r[2] = d[v[p++] - s];
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
410 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
411
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
412 // fill code-like entries with r
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
413 f = 1 << (k - w);
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
414
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
415 for (j = i >>> w; j < z; j += f) {
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
416 System.arraycopy(r, 0, hp, (q + j) * 3, 3);
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
417 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
418
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
419 // backwards increment the k-bit code i
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
420 for (j = 1 << (k - 1); (i & j) != 0; j >>>= 1) {
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
421 i ^= j;
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
422 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
423
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
424 i ^= j;
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
425 // backup over finished tables
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
426 mask = (1 << w) - 1; // needed on HP, cc -O bug
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
427
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
428 while ((i & mask) != x[h]) {
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
429 h--; // don't need to update q
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
430 w -= l;
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
431 mask = (1 << w) - 1;
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
432 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
433 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
434 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
435
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
436 // Return Z_BUF_ERROR if we were given an incomplete table
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
437 return y != 0 && g != 1 ? Z_BUF_ERROR : Z_OK;
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
438 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
439
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
440 int inflate_trees_bits(int[] c, // 19 code lengths
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
441 int[] bb, // bits tree desired/actual depth
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
442 int[] tb, // bits tree result
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
443 int[] hp, // space for trees
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
444 ZStream z // for messages
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
445 ) {
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
446 int result;
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
447 initWorkArea(19);
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
448 hn[0] = 0;
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
449 result = huft_build(c, 0, 19, 19, null, null, tb, bb, hp, hn, v);
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
450
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
451 if (result == Z_DATA_ERROR) {
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
452 z.msg = "oversubscribed dynamic bit lengths tree";
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
453 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
454 else if (result == Z_BUF_ERROR || bb[0] == 0) {
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
455 z.msg = "incomplete dynamic bit lengths tree";
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
456 result = Z_DATA_ERROR;
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
457 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
458
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
459 return result;
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
460 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
461
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
462 int inflate_trees_dynamic(int nl, // number of literal/length codes
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
463 int nd, // number of distance codes
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
464 int[] c, // that many (total) code lengths
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
465 int[] bl, // literal desired/actual bit depth
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
466 int[] bd, // distance desired/actual bit depth
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
467 int[] tl, // literal/length tree result
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
468 int[] td, // distance tree result
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
469 int[] hp, // space for trees
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
470 ZStream z // for messages
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
471 ) {
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
472 int result;
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
473 // build literal/length tree
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
474 initWorkArea(288);
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
475 hn[0] = 0;
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
476 result = huft_build(c, 0, nl, 257, cplens, cplext, tl, bl, hp, hn, v);
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
477
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
478 if (result != Z_OK || bl[0] == 0) {
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
479 if (result == Z_DATA_ERROR) {
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
480 z.msg = "oversubscribed literal/length tree";
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
481 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
482 else if (result != Z_MEM_ERROR) {
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
483 z.msg = "incomplete literal/length tree";
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
484 result = Z_DATA_ERROR;
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
485 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
486
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
487 return result;
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
488 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
489
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
490 // build distance tree
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
491 initWorkArea(288);
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
492 result = huft_build(c, nl, nd, 0, cpdist, cpdext, td, bd, hp, hn, v);
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
493
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
494 if (result != Z_OK || (bd[0] == 0 && nl > 257)) {
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
495 if (result == Z_DATA_ERROR) {
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
496 z.msg = "oversubscribed distance tree";
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
497 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
498 else if (result == Z_BUF_ERROR) {
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
499 z.msg = "incomplete distance tree";
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
500 result = Z_DATA_ERROR;
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
501 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
502 else if (result != Z_MEM_ERROR) {
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
503 z.msg = "empty distance tree with lengths";
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
504 result = Z_DATA_ERROR;
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
505 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
506
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
507 return result;
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
508 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
509
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
510 return Z_OK;
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
511 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
512
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
513 static int inflate_trees_fixed(int[] bl, //literal desired/actual bit depth
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
514 int[] bd, //distance desired/actual bit depth
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
515 int[][] tl,//literal/length tree result
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
516 int[][] td,//distance tree result
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
517 ZStream z //for memory allocation
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
518 ) {
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
519 bl[0] = fixed_bl;
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
520 bd[0] = fixed_bd;
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
521 tl[0] = fixed_tl;
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
522 td[0] = fixed_td;
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
523 return Z_OK;
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
524 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
525
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
526 private void initWorkArea(int vsize) {
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
527 if (hn == null) {
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
528 hn = new int[1];
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
529 v = new int[vsize];
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
530 c = new int[BMAX + 1];
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
531 r = new int[3];
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
532 u = new int[BMAX];
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
533 x = new int[BMAX + 1];
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
534 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
535
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
536 if (v.length < vsize) { v = new int[vsize]; }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
537
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
538 for (int i = 0; i < vsize; i++) {v[i] = 0;}
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
539
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
540 for (int i = 0; i < BMAX + 1; i++) {c[i] = 0;}
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
541
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
542 for (int i = 0; i < 3; i++) {r[i] = 0;}
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
543
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
544 // for(int i=0; i<BMAX; i++){u[i]=0;}
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
545 System.arraycopy(c, 0, u, 0, BMAX);
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
546 // for(int i=0; i<BMAX+1; i++){x[i]=0;}
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
547 System.arraycopy(c, 0, x, 0, BMAX + 1);
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
548 }
0ce5cc452d02 initial version
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
549 }