1 | // Copyright (c) 2013 by István Váradi
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2 |
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3 | // This file is part of XPLRA, a remote-access plugin for X-Plane
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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, this
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9 | // list of conditions and the following disclaimer.
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10 | // 2. Redistributions in binary form must reproduce the above copyright notice,
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11 | // this list of conditions and the following disclaimer in the documentation
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12 | // and/or other materials provided with the distribution.
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13 |
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14 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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15 | // ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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16 | // WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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17 | // DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
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18 | // ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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19 | // (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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20 | // LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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21 | // ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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22 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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23 | // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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24 |
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25 | // The views and conclusions contained in the software and documentation are those
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26 | // of the authors and should not be interpreted as representing official policies,
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27 | // either expressed or implied, of the FreeBSD Project.
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28 |
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29 | #ifndef HU_VARADIISTVAN_XPLRA_XPLANE_H
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30 | #define HU_VARADIISTVAN_XPLRA_XPLANE_H
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31 | //-----------------------------------------------------------------------------
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32 |
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33 | #include "Exception.h"
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34 |
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35 | #include <hu/varadiistvan/scpl/io/Waiter.h>
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36 |
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37 | #include <set>
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38 |
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39 | #include <inttypes.h>
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40 |
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41 | //-----------------------------------------------------------------------------
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42 |
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43 | namespace hu { namespace varadiistvan { namespace scpl { namespace io {
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44 |
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45 | class LocalClientSocket;
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46 | class DataStream;
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47 |
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48 | } /* namespace hu::varadiistvan::scpl::io */ } /* namespace hu::varadiistvan::scpl */ } /* namespace hu::varadiistvan */ } /* namespace hu */
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49 |
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50 | //------------------------------------------------------------------------------
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51 |
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52 | namespace hu { namespace varadiistvan { namespace xplra {
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53 |
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54 | //------------------------------------------------------------------------------
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55 |
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56 | class MultiBuffer;
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57 | class MultiGetter;
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58 | class MultiSetter;
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59 |
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60 | //------------------------------------------------------------------------------
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61 |
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62 | /**
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63 | * The main class to access X-Plane.
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64 | *
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65 | * The calls are synchronous and not thread-safe.
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66 | */
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67 | class XPlane
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68 | {
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69 | private:
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70 | /**
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71 | * Type for the set of multi-dataref buffers.
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72 | */
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73 | typedef std::set<MultiBuffer*> multiBuffers_t;
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74 |
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75 | /**
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76 | * The waiter to use.
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77 | */
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78 | scpl::io::Waiter waiter;
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79 |
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80 | /**
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81 | * The local client socket over which we are communicating with X-Plane.
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82 | */
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83 | scpl::io::LocalClientSocket* socket;
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84 |
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85 | /**
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86 | * The data stream to handle the data conversions.
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87 | */
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88 | scpl::io::DataStream* stream;
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89 |
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90 | /**
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91 | * The buffers created by this object.
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92 | */
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93 | multiBuffers_t multiBuffers;
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94 |
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95 | public:
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96 | /**
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97 | * Construct the object. It will not be connected to the simulator
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98 | * yet.
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99 | */
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100 | XPlane() throw();
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101 |
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102 | /**
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103 | * Destroy the object. If connected, the connection will be
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104 | * closed. It destroys all existing buffers, so their references
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105 | * become invalid.
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106 | */
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107 | ~XPlane() throw();
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108 |
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109 | /**
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110 | * Connect to the simulator.
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111 | */
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112 | void connect() throw(IOException);
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113 |
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114 | /**
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115 | * Check if we are connected to the simulator.
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116 | */
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117 | bool isConnected() const throw();
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118 |
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119 | /**
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120 | * Disconnect from the simulator.
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121 | */
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122 | void disconnect() throw();
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123 |
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124 | /**
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125 | * Create a new getter of multiple datarefs and return a reference
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126 | * to it.
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127 | */
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128 | MultiGetter& createMultiGetter() throw();
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129 |
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130 | /**
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131 | * Create a new setter of multiple datarefs and return a reference
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132 | * to it.
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133 | */
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134 | MultiSetter& createMultiSetter() throw();
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135 |
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136 | /**
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137 | * Destroy the given getter or setter of multiple datarefs. As the
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138 | * buffer is unregistered, if it has been registered previously,
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139 | * and unregistration may fail, this function might throw an
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140 | * exception.
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141 | *
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142 | * @return if the buffer was found and could be destroyed
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143 | */
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144 | bool destroyMultiBuffer(MultiBuffer& buffer) throw(Exception);
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145 |
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146 | /**
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147 | * Get the versions of X-Plane, XPLM and the XPLRA plugin.
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148 | */
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149 | void getVersions(int& xplaneVersion, int& xplmVersion, int& xplraVersion) throw(Exception);
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150 |
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151 | /**
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152 | * Get the integer value of the dataref with the given name.
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153 | */
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154 | int getInt(const char* name) throw(Exception);
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155 |
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156 | /**
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157 | * Get a float value.
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158 | */
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159 | float getFloat(const char* name) throw(Exception);
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160 |
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161 | /**
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162 | * Get a double value.
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163 | */
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164 | double getDouble(const char* name) throw(Exception);
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165 |
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166 | /**
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167 | * Get a possibly partial array of floats.
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168 | *
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169 | * @param length the length of the destination buffer
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170 | * @param offset the offset from which to get the array
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171 | *
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172 | * @return the number of values acquired actually
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173 | */
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174 | size_t getFloatArray(const char* name, float* dest,
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175 | size_t length, size_t offset = 0) throw(Exception);
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176 |
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177 | /**
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178 | * Get a possibly partial array of floats. The result array will
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179 | * be created with a length needed to hold the returned value.
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180 | *
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181 | * @param offset the offset from which to get the array
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182 | */
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183 | float* getFloatArray(const char* name, size_t& length,
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184 | size_t offset = 0) throw(Exception);
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185 |
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186 | /**
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187 | * Get a possibly partial array of integers.
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188 | *
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189 | * @param length the length of the destination buffer
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190 | * @param offset the offset from which to get the array
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191 | *
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192 | * @return the number of values acquired actually
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193 | */
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194 | size_t getIntArray(const char* name, int32_t* dest,
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195 | size_t length, size_t offset = 0) throw(Exception);
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196 |
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197 | /**
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198 | * Get a possibly partial array of integers. The result array will
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199 | * be created with a length needed to hold the returned value.
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200 | *
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201 | * @param offset the offset from which to get the array
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202 | */
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203 | int32_t* getIntArray(const char* name, size_t& length,
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204 | size_t offset = 0) throw(Exception);
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205 |
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206 | /**
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207 | * Get a possibly partial array of bytes.
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208 | *
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209 | * @param length the length of the destination buffer
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210 | * @param offset the offset from which to get the array
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211 | *
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212 | * @return the number of values acquired actually
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213 | */
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214 | size_t getByteArray(const char* name, uint8_t* dest,
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215 | size_t length, size_t offset = 0) throw(Exception);
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216 |
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217 | /**
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218 | * Get a possibly partial array of bytes. The result array will
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219 | * be created with a length needed to hold the returned value.
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220 | *
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221 | * @param offset the offset from which to get the array
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222 | */
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223 | uint8_t* getByteArray(const char* name, size_t& lengyh,
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224 | size_t offset = 0) throw(Exception);
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225 |
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226 | /**
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227 | * Get a string. A string is a byte array.
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228 | */
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229 | std::string getString(const char* name, size_t offset = 0) throw(Exception);
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230 |
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231 | /**
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232 | * Set the given dataref to the given integer value.
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233 | */
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234 | void setInt(const char* name, int value) throw(Exception);
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235 |
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236 | /**
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237 | * Set the given dataref to the given float value.
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238 | */
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239 | void setFloat(const char* name, float value) throw(Exception);
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240 |
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241 | /**
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242 | * Set the given dataref to the given double value.
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243 | */
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244 | void setDouble(const char* name, double value) throw(Exception);
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245 |
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246 | /**
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247 | * Set the given float array to values in the given buffer.
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248 | */
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249 | void setFloatArray(const char* name, const float* values, size_t length,
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250 | size_t offset = 0) throw(Exception);
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251 |
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252 | /**
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253 | * Set the given integer array to values in the given buffer.
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254 | */
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255 | void setIntArray(const char* name, const int32_t* values, size_t length,
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256 | size_t offset = 0) throw(Exception);
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257 |
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258 | /**
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259 | * Set the given byte array to values in the given buffer.
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260 | */
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261 | void setByteArray(const char* name, const uint8_t* values, size_t length,
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262 | size_t offset = 0) throw(Exception);
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263 |
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264 | /**
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265 | * Set the given string to the given value. Since strings are byte
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266 | * arrays, and the bytes after the string should be zeroed, the
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267 | * length must be given. The string will be converted to a byte
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268 | * array of the given length, padded with 0s.
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269 | */
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270 | void setString(const char* name, const char* value, size_t length,
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271 | size_t offset = 0) throw(Exception);
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272 |
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273 | private:
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274 | /**
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275 | * Check if we have a stream and if it has not failed.
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276 | */
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277 | void checkStream() throw(NotConnectedException, IOException);
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278 |
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279 | /**
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280 | * Check the given protocol result. If it signifies an error,
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281 | * throw a ProtocolException with the correct error code.
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282 | */
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283 | void checkResult(uint8_t result) throw(ProtocolException);
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284 |
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285 | /**
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286 | * Read and check the result. If it signifies an error,
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287 | * throw a ProtocolException with the correct error code. If there
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288 | * is some problem with the stream, an IOException is thrown.
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289 | */
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290 | void checkResult() throw(ProtocolException, IOException);
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291 |
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292 | /**
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293 | * Issue the command to get a single, scalar value. The result is
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294 | * also checked, but the value should be read by the caller.
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295 | */
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296 | void getScalar(const char* name, uint8_t type) throw(Exception);
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297 |
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298 | /**
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299 | * Issue the command to get an array of values of the given
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300 | * type. It checks the result and retrieves the number of value
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301 | * items available.
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302 | *
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303 | * @return the number of value items available
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304 | */
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305 | size_t getArray(const char* name, uint8_t type,
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306 | ssize_t length, size_t offset) throw(Exception);
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307 |
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308 |
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309 | /**
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310 | * Issue the command to set a scalar value of the given type.
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311 | */
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312 | void setScalar(const char* name, uint8_t type) throw(Exception);
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313 |
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314 | /**
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315 | * Issue the command to set an array value of the given type.
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316 | */
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317 | void setArray(const char* name, uint8_t type, size_t length,
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318 | size_t offset) throw(Exception);
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319 |
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320 | friend class MultiBuffer;
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321 | friend class MultiGetter;
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322 | friend class MultiSetter;
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323 | };
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324 |
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325 | //------------------------------------------------------------------------------
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326 | // Inline definitions
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327 | //------------------------------------------------------------------------------
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328 |
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329 | inline XPlane::XPlane() throw() :
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330 | socket(0),
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331 | stream(0)
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332 | {
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333 | }
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334 |
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335 | //------------------------------------------------------------------------------
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336 |
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337 | inline bool XPlane::isConnected() const throw()
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338 | {
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339 | return socket!=0;
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340 | }
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341 |
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342 | //------------------------------------------------------------------------------
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343 |
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344 | } /* namespace hu::varadiistvan::xplra */ } /* namespace hu::varadiistvan */ } /* namespace hu */
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345 |
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346 | //------------------------------------------------------------------------------
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347 | #endif // HU_VARADIISTVAN_XPLRA_XPLANE_H
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348 |
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349 | // Local Variables:
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350 | // mode: C++
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351 | // c-basic-offset: 4
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352 | // indent-tabs-mode: nil
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353 | // End:
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