| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.tika.parser.microsoft.chm; |
| |
| import static java.nio.charset.StandardCharsets.UTF_8; |
| |
| public class ChmConstants { |
| public static final String DEFAULT_CHARSET = UTF_8.name(); |
| public static final String ITSF = "ITSF"; |
| public static final String ITSP = "ITSP"; |
| public static final String PMGL = "PMGL"; |
| public static final String LZXC = "LZXC"; |
| public static final String CHM_PMGI_MARKER = "PMGI"; |
| public static final int BYTE_ARRAY_LENGHT = 16; |
| public static final int CHM_ITSF_V2_LEN = 0x58; |
| public static final int CHM_ITSF_V3_LEN = 0x60; |
| public static final int CHM_ITSP_V1_LEN = 0x54; |
| public static final int CHM_PMGL_LEN = 0x14; |
| public static final int CHM_PMGI_LEN = 0x08; |
| public static final int CHM_LZXC_RESETTABLE_V1_LEN = 0x28; |
| public static final int CHM_LZXC_MIN_LEN = 0x18; |
| public static final int CHM_LZXC_V2_LEN = 0x1c; |
| public static final int CHM_SIGNATURE_LEN = 4; |
| public static final int CHM_VER_2 = 2; |
| public static final int CHM_VER_3 = 3; |
| public static final int CHM_VER_1 = 1; |
| public static final int CHM_WINDOW_SIZE_BLOCK = 0x8000; |
| /* my hacking */ |
| public static final int START_PMGL = 0xCC; |
| public static final String CONTROL_DATA = "ControlData"; |
| public static final String RESET_TABLE = "ResetTable"; |
| public static final String CONTENT = "Content"; |
| /* some constants defined by the LZX specification */ |
| public static final int LZX_MIN_MATCH = 2; |
| public static final int LZX_MAX_MATCH = 257; |
| public static final int LZX_NUM_CHARS = 256; |
| public static final int LZX_BLOCKTYPE_INVALID = 0; /* |
| * also blocktypes 4-7 |
| * invalid |
| */ |
| public static final int LZX_BLOCKTYPE_VERBATIM = 1; |
| public static final int LZX_BLOCKTYPE_ALIGNED = 2; |
| public static final int LZX_BLOCKTYPE_UNCOMPRESSED = 3; |
| public static final int LZX_PRETREE_NUM_ELEMENTS_BITS = 4; /* ??? */ |
| public static final int LZX_PRETREE_NUM_ELEMENTS = 20; |
| public static final int LZX_ALIGNED_NUM_ELEMENTS = 8; /* |
| * aligned offset tree |
| * #elements |
| */ |
| public static final int LZX_NUM_PRIMARY_LENGTHS = 7; /* |
| * this one missing |
| * from spec! |
| */ |
| public static final int LZX_NUM_SECONDARY_LENGTHS = 249; /* |
| * length tree |
| * #elements |
| */ |
| /* LZX huffman defines: tweak tablebits as desired */ |
| public static final int LZX_PRETREE_MAXSYMBOLS = LZX_PRETREE_NUM_ELEMENTS; |
| public static final int LZX_PRETREE_TABLEBITS = 6; |
| public static final int LZX_MAINTREE_MAXSYMBOLS = LZX_NUM_CHARS + 50 * 8; |
| public static final int LZX_MAIN_MAXSYMBOLS = LZX_NUM_CHARS * 2; |
| public static final int LZX_MAINTREE_TABLEBITS = 12; |
| public static final int LZX_LENGTH_MAXSYMBOLS = LZX_NUM_SECONDARY_LENGTHS + 1; |
| public static final int LZX_LENGTH_TABLEBITS = 12; |
| public static final int LZX_ALIGNED_MAXSYMBOLS = LZX_ALIGNED_NUM_ELEMENTS; |
| public static final int LZX_ALIGNED_TABLEBITS = 7; |
| public static final int LZX_LENTABLE_SAFETY = 64; |
| public static short[] EXTRA_BITS = |
| {0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, |
| 12, 13, 13, 14, 14, 15, 15, 16, 16, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, |
| 17, 17, 17, 17}; |
| public static int[] POSITION_BASE = |
| {0, 1, 2, 3, 4, 6, 8, 12, 16, 24, 32, 48, 64, 96, 128, 192, 256, 384, 512, 768, 1024, |
| 1536, 2048, 3072, 4096, 6144, 8192, 12288, 16384, 24576, 32768, 49152, 65536, |
| 98304, 131072, 196608, 262144, 393216, 524288, 655360, 786432, 917504, 1048576, |
| 1179648, 1310720, 1441792, 1572864, 1703936, 1835008, 1966080, 2097152}; |
| |
| /* Prevents instantiation */ |
| private ChmConstants() { |
| } |
| } |
