Mercurial > fife-parpg

annotate engine/core/vfs/raw/rawdata.h @ 112:98541d3b9220

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* add some std types to swig wrapper (fife.i.templ) * remove the types in interfaces that used them * add possibility to list video modes to engine settings class
author spq@33b003aa-7bff-0310-803a-e67f0ece8222
date Sun, 27 Jul 2008 13:36:03 +0000
parents 90005975cdbb
children
rev   line source
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1 /***************************************************************************
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2 * Copyright (C) 2005-2008 by the FIFE team *
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3 * http://www.fifengine.de *
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4 * This file is part of FIFE. *
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5 * *
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90005975cdbb * Final LGPL switch step by adjusting the file headers
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6 * FIFE is free software; you can redistribute it and/or *
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7 * modify it under the terms of the GNU Lesser General Public *
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8 * License as published by the Free Software Foundation; either *
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9 * version 2.1 of the License, or (at your option) any later version. *
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10 * *
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11 * This library is distributed in the hope that it will be useful, *
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12 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
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13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
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14 * Lesser General Public License for more details. *
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15 * *
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16 * You should have received a copy of the GNU Lesser General Public *
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17 * License along with this library; if not, write to the *
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18 * Free Software Foundation, Inc., *
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19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA *
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20 ***************************************************************************/
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21
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22 #ifndef FIFE_VFS_RAW_RAWDATA_H
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23 #define FIFE_VFS_RAW_RAWDATA_H
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24
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25 // Standard C++ library includes
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26 #include <vector>
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27
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28 // Platform specific includes
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29 #include "util/base/fife_stdint.h"
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30
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31 // 3rd party library includes
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32 #include <boost/shared_ptr.hpp>
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33
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34 // FIFE includes
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35 // These includes are split up in two parts, separated by one empty line
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36 // First block: files included from the FIFE root src directory
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37 // Second block: files included from the same folder
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38
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39 #include "rawdatasource.h"
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40
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41 namespace FIFE {
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42
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43 /** Used to access diffrent kinds of data.
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44 *
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45 * RawData uses RawDataSource to get the real data - that way the user doesn't have to know where the data comes
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46 * from (real files, files inside archives etc.)
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47 */
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48 class RawData {
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49 public:
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50 RawData(RawDataSource* datasource);
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51 virtual ~RawData();
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52
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53 /** get the data as a vector of bytes
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54 */
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55 std::vector<uint8_t> getDataInBytes();
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56
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57 /** get the data in distinct lines
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58 */
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59 std::vector<std::string> getDataInLines();
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60
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61
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62 /** get the complete datalength
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63 *
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64 * @return the complete datalength
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65 */
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66 unsigned int getDataLength() const;
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67
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68 /** get the current index
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69 *
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70 * @return the current index
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71 */
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72 unsigned int getCurrentIndex() const;
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73
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74 /** set the current index
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75 *
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76 * @param index the new index
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77 * @throws IndexOverflow if index is >= getDataLength()
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78 */
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79 void setIndex(unsigned int index);
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80
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81 /** move the current index
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82 *
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83 * @param offset the offset
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84 * @throws IndexOverflow if we move outside the datalength
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85 */
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86 void moveIndex(int offset);
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87
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88 /** helper-function
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89 *
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90 * reads sizeof(T) bytes - should be used with fixed-size datatypes like uint32_t, uint16_t, uint8_t etc.
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91 * @return the data
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92 */
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93 template <typename T> T readSingle() {
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94 T val;
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95 readInto(reinterpret_cast<uint8_t*>(&val), sizeof(T));
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96 return val;
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97 }
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98
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99 /** read len bytes into buffer
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100 *
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101 * @param buffer the data will be written into it
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102 * @param len len bytes will be written
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103 * @throws IndexOverflow if currentindex + len > getCurrentIndex()
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104 */
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105 void readInto(uint8_t* buffer, size_t len);
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106
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107 /** reads 1 byte */
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108 uint8_t read8();
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109
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110 /** reads a uint16_t littleEndian and converts them to the host-byteorder
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111 * @throws IndexOverflow
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112 */
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113 uint16_t read16Little();
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114
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115 /** reads a uint16_t littleEndian and converts them to the host-byteorder
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116 *
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117 * @throws IndexOverflow
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118 */
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119 uint32_t read32Little();
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120
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121 /** reads a uint16_t bigEndian and converts them to the host-byteorder
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122 *
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123 * @throws IndexOverflow
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124 */
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125 uint16_t read16Big();
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126
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127 /** reads a uint16_t bigEndian and converts them to the host-byteorder
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128 *
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129 * @throws IndexOverflow
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130 */
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131 uint32_t read32Big();
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132
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133 /** read a string with len bytes, not assuming a terminating 0
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134 *
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135 * @param len the stringlen
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136 * @return the string
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137 * @throws IndexOverflow
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138 */
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139 std::string readString(size_t len);
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140
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141 /** Reads all data into the buffer
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142 * Created to especially fulfill python file interface requirements
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143 */
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144 void read(std::string& outbuffer, int size=-1);
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145
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146 /** reads until a \\n is encountered or no more data is available
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147 *
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148 * @param buffer if successfull the new string will be assigned to buffer
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149 * @return true if data was available, false otherwise (in that case buffer won't be touched)
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150 */
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151 bool getLine(std::string& buffer);
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152
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153 private:
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154 RawDataSource* m_datasource;
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155 size_t m_index_current;
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156
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157 template <typename T> T littleToHost(T value) const {
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158 if (littleEndian())
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159 return value;
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160 else
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161 return revert(value);
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162 }
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163
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164 template <typename T> T bigToHost(T value) const {
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165 if (!littleEndian())
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166 return value;
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167 else
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168 return revert(value);
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169 }
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170
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171 template <typename T> T revert(T value) const {
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172 T retval;
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173 for (unsigned int i = 0; i < sizeof(T); ++i)
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174 reinterpret_cast<uint8_t*>(&retval)[i] = reinterpret_cast<uint8_t*>(&value)[sizeof(T)-1-i];
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175
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176 return retval;
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177 }
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178
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179 RawData(const RawData&);
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180 RawData& operator=(const RawData&) { return *this; };
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181
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182 static bool littleEndian();
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183 };
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184 typedef boost::shared_ptr<RawData> RawDataPtr;
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185
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186 class IndexSaver {
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187 public:
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188 IndexSaver(RawData* d) : m_rd(d), m_index(m_rd->getCurrentIndex()) {}
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189
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190 ~IndexSaver() {
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191 m_rd->setIndex(m_index);
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192 }
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193
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194 private:
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195 RawData* m_rd;
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196 unsigned int m_index;
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197
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198 IndexSaver(const IndexSaver&);
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199 IndexSaver& operator=(const IndexSaver&) { return *this; }
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200 };
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201
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202 }//FIFE
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203
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204 #endif