1 /************************************************************** 2 * 3 * Licensed to the Apache Software Foundation (ASF) under one 4 * or more contributor license agreements. See the NOTICE file 5 * distributed with this work for additional information 6 * regarding copyright ownership. The ASF licenses this file 7 * to you under the Apache License, Version 2.0 (the 8 * "License"); you may not use this file except in compliance 9 * with the License. You may obtain a copy of the License at 10 * 11 * http://www.apache.org/licenses/LICENSE-2.0 12 * 13 * Unless required by applicable law or agreed to in writing, 14 * software distributed under the License is distributed on an 15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 16 * KIND, either express or implied. See the License for the 17 * specific language governing permissions and limitations 18 * under the License. 19 * 20 *************************************************************/ 21 22 23 #ifndef _XMLSEARCH_UTIL_DECOMPRESSOR_HXX_ 24 #define _XMLSEARCH_UTIL_DECOMPRESSOR_HXX_ 25 26 #ifndef INCLUDED_STL_VECTOR 27 #include <vector> 28 #define INCLUDED_STL_VECTOR 29 #endif 30 #include <excep/XmlSearchExceptions.hxx> 31 #include <util/RandomAccessStream.hxx> 32 33 34 namespace xmlsearch { 35 36 namespace util { 37 38 39 class CompressorIterator; 40 41 42 class Decompressor 43 { 44 public: 45 Decompressor()46 Decompressor() 47 : toRead_( 0 ), 48 path_( 0 ) 49 { 50 } 51 ~Decompressor()52 virtual ~Decompressor() { } 53 54 virtual sal_Int32 getNextByte() = 0; 55 initReading()56 virtual void initReading() 57 { 58 toRead_ = 0; 59 } 60 61 private: 62 63 static const sal_Int32 BitsInByte; 64 static const sal_Int32 NBits; 65 66 sal_Int32 readByte_, toRead_, path_; 67 }; 68 69 70 71 72 class StreamDecompressor 73 : public Decompressor 74 { 75 public: 76 StreamDecompressor(RandomAccessStream * in)77 StreamDecompressor( RandomAccessStream* in ) 78 : in_( in ) 79 { 80 } 81 ~StreamDecompressor()82 ~StreamDecompressor() { } 83 84 85 virtual sal_Int32 getNextByte(); 86 87 private: 88 89 RandomAccessStream* in_; 90 91 }; 92 93 94 95 class ByteArrayDecompressor 96 : public Decompressor 97 { 98 public: 99 ByteArrayDecompressor(sal_Int32 arrayL,sal_Int8 * array,sal_Int32 index)100 ByteArrayDecompressor( sal_Int32 arrayL,sal_Int8* array,sal_Int32 index ) 101 { 102 initReading(array,arrayL,index); 103 } 104 105 ~ByteArrayDecompressor()106 ~ByteArrayDecompressor() { } 107 bytesRead()108 sal_Int32 bytesRead() 109 { 110 return index_ - index0_; 111 } 112 113 getNextByte()114 sal_Int32 getNextByte() throw( xmlsearch::excep::XmlSearchException ) 115 { 116 if( arrayL_ <= index_ ) 117 throw xmlsearch::excep::XmlSearchException( 118 rtl::OUString::createFromAscii( "ByteArrayDecompressor->getNextByte()" ) ); 119 return array_[index_++] & 0xFF; 120 } 121 122 123 private: 124 125 sal_Int32 arrayL_; 126 sal_Int8 *array_; 127 128 sal_Int32 index_,index0_; 129 130 using xmlsearch::util::Decompressor::initReading; initReading(sal_Int8 * array,sal_Int32 arrayL,sal_Int32 index)131 void initReading( sal_Int8* array,sal_Int32 arrayL,sal_Int32 index ) 132 { 133 arrayL_ = arrayL; 134 array_ = array; 135 index_ = index0_ = index; 136 Decompressor::initReading(); 137 } 138 139 }; 140 141 142 } 143 144 } 145 146 147 #endif 148