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 | //------------------------------------------------------------------------------
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30 |
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31 | #include "XPlane.h"
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32 |
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33 | #include <hu/varadiistvan/scpl/io/LocalClientSocket.h>
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34 | #include <hu/varadiistvan/scpl/io/DataStream.h>
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35 |
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36 | #include <xplra/Protocol.h>
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37 |
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38 | #include <memory>
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39 |
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40 | //------------------------------------------------------------------------------
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41 |
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42 | using hu::varadiistvan::xplra::XPlane;
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43 |
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44 | using hu::varadiistvan::scpl::io::LocalClientSocket;
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45 | using hu::varadiistvan::scpl::io::LocalConnector;
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46 | using hu::varadiistvan::scpl::io::DataStream;
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47 |
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48 | using xplra::Protocol;
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49 |
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50 | using std::auto_ptr;
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51 | using std::string;
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52 |
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53 | //------------------------------------------------------------------------------
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54 |
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55 | inline void XPlane::checkStream() throw(NotConnectedException, IOException)
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56 | {
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57 | if (stream==0) {
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58 | throw NotConnectedException();
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59 | } else if (stream->failed()) {
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60 | throw IOException(stream->getErrorCode());
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61 | }
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62 | }
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63 |
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64 | //------------------------------------------------------------------------------
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65 |
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66 | void XPlane::checkResult(uint8_t result) throw(ProtocolException)
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67 | {
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68 | switch(result) {
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69 | case Protocol::RESULT_OK:
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70 | return;
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71 | case Protocol::RESULT_INVALID_COMMAND:
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72 | throw ProtocolException(ProtocolException::INVALID_COMMAND);
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73 | case Protocol::RESULT_UNKNOWN_DATAREF:
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74 | throw ProtocolException(ProtocolException::UNKNOWN_DATAREF);
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75 | case Protocol::RESULT_INVALID_TYPE:
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76 | throw ProtocolException(ProtocolException::INVALID_TYPE);
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77 | case Protocol::RESULT_INVALID_LENGTH:
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78 | throw ProtocolException(ProtocolException::INVALID_LENGTH);
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79 | case Protocol::RESULT_INVALID_OFFSET:
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80 | throw ProtocolException(ProtocolException::INVALID_OFFSET);
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81 | case Protocol::RESULT_INVALID_COUNT:
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82 | throw ProtocolException(ProtocolException::INVALID_COUNT);
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83 | case Protocol::RESULT_INVALID_ID:
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84 | throw ProtocolException(ProtocolException::INVALID_ID);
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85 | case Protocol::RESULT_OTHER_ERROR:
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86 | default:
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87 | throw ProtocolException(ProtocolException::OTHER);
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88 | }
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89 | }
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90 |
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91 | //------------------------------------------------------------------------------
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92 |
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93 | inline void XPlane::checkResult() throw(ProtocolException)
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94 | {
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95 | uint8_t result = stream->readU8();
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96 | checkStream();
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97 | checkResult(result);
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98 | }
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99 |
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100 | //------------------------------------------------------------------------------
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101 | //------------------------------------------------------------------------------
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102 |
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103 | XPlane::~XPlane() throw()
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104 | {
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105 | disconnect();
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106 | }
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107 |
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108 | //------------------------------------------------------------------------------
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109 |
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110 | void XPlane::connect() throw(IOException)
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111 | {
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112 | if (socket!=0) return;
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113 |
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114 | auto_ptr<LocalClientSocket> clientSocket(new LocalClientSocket("xplra",
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115 | &waiter));
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116 | LocalConnector& connector = clientSocket->getConnector();
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117 |
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118 | while (!connector.connect()) {
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119 | if (connector.failed()) {
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120 | throw IOException(connector.getErrorCode());
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121 | }
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122 | waiter.wait();
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123 | if (waiter.failed()) {
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124 | throw IOException(waiter.getErrorCode());
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125 | }
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126 | }
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127 |
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128 | socket = clientSocket.release();
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129 | stream = new DataStream(*socket);
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130 | }
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131 |
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132 | //------------------------------------------------------------------------------
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133 |
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134 | void XPlane::disconnect() throw()
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135 | {
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136 | if (socket==0) return;
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137 |
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138 | delete stream; stream = 0;
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139 | delete socket; socket = 0;
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140 | }
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141 |
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142 | //------------------------------------------------------------------------------
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143 |
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144 | void XPlane::getScalar(const char* name, uint8_t type) throw(Exception)
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145 | {
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146 | checkStream();
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147 |
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148 | stream->writeU8(Protocol::COMMAND_GET_SINGLE);
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149 | stream->writeString(name, strlen(name));
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150 | stream->writeU8(type);
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151 | if (!stream->flush()) checkStream();
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152 |
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153 | checkResult();
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154 | }
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155 |
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156 | //------------------------------------------------------------------------------
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157 |
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158 | int XPlane::getInt(const char* name) throw(Exception)
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159 | {
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160 | getScalar(name, Protocol::TYPE_INT);
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161 |
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162 | int value = stream->readS32();
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163 | checkStream();
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164 | return value;
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165 | }
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166 |
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167 | //------------------------------------------------------------------------------
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168 |
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169 | float XPlane::getFloat(const char* name) throw(Exception)
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170 | {
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171 | getScalar(name, Protocol::TYPE_FLOAT);
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172 |
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173 | float value = stream->readFloat();
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174 | checkStream();
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175 | return value;
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176 | }
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177 |
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178 | //------------------------------------------------------------------------------
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179 |
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180 | double XPlane::getDouble(const char* name) throw(Exception)
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181 | {
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182 | getScalar(name, Protocol::TYPE_DOUBLE);
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183 |
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184 | double value = stream->readDouble();
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185 | checkStream();
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186 | return value;
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187 | }
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188 |
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189 | //------------------------------------------------------------------------------
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190 |
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191 | size_t XPlane::getArray(const char* name, uint8_t type,
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192 | ssize_t length, size_t offset) throw(Exception)
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193 | {
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194 | checkStream();
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195 |
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196 | stream->writeU8(Protocol::COMMAND_GET_SINGLE);
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197 | stream->writeString(name, strlen(name));
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198 | stream->writeU8(type);
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199 | stream->writeS32(static_cast<int32_t>(length));
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200 | stream->writeS32(static_cast<int32_t>(offset));
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201 | if (!stream->flush()) checkStream();
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202 |
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203 | uint8_t result = stream->readU8();
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204 | length = stream->readS32();
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205 | checkStream();
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206 | checkResult(result);
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207 |
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208 | return length;
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209 | }
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210 |
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211 | //------------------------------------------------------------------------------
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212 |
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213 | size_t XPlane::getFloatArray(const char* name, float* dest,
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214 | size_t length, size_t offset) throw(Exception)
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215 | {
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216 | length = getArray(name, Protocol::TYPE_FLOAT_ARRAY, length, offset);
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217 |
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218 | if (!stream->read(dest, length*sizeof(float))) checkStream();
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219 |
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220 | return length;
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221 | }
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222 |
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223 | //------------------------------------------------------------------------------
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224 |
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225 | float* XPlane::getFloatArray(const char* name, size_t& length,
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226 | size_t offset) throw(Exception)
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227 | {
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228 | length = getArray(name, Protocol::TYPE_FLOAT_ARRAY, -1, offset);
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229 |
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230 | auto_ptr<float> data(new float[length]);
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231 | if (!stream->read(data.get(), length*sizeof(float))) checkStream();
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232 | return data.release();
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233 | }
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234 |
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235 | //------------------------------------------------------------------------------
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236 |
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237 | size_t XPlane::getIntArray(const char* name, int32_t* dest,
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238 | size_t length, size_t offset) throw(Exception)
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239 | {
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240 | length = getArray(name, Protocol::TYPE_INT_ARRAY, length, offset);
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241 |
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242 | if (!stream->read(dest, length*sizeof(int32_t))) checkStream();
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243 |
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244 | return length;
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245 | }
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246 |
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247 | //------------------------------------------------------------------------------
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248 |
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249 | int32_t* XPlane::getIntArray(const char* name, size_t& length,
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250 | size_t offset) throw(Exception)
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251 | {
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252 | length = getArray(name, Protocol::TYPE_INT_ARRAY, -1, offset);
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253 |
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254 | auto_ptr<int32_t> data(new int32_t[length]);
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255 | if (!stream->read(data.get(), length*sizeof(int32_t))) checkStream();
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256 | return data.release();
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257 | }
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258 |
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259 | //------------------------------------------------------------------------------
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260 |
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261 | size_t XPlane::getByteArray(const char* name, uint8_t* dest,
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262 | size_t length, size_t offset) throw(Exception)
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263 | {
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264 | length = getArray(name, Protocol::TYPE_BYTE_ARRAY, length, offset);
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265 |
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266 | if (!stream->read(dest, length*sizeof(uint8_t))) checkStream();
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267 |
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268 | return length;
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269 | }
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270 |
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271 | //------------------------------------------------------------------------------
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272 |
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273 | uint8_t* XPlane::getByteArray(const char* name, size_t& length,
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274 | size_t offset) throw(Exception)
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275 | {
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276 | length = getArray(name, Protocol::TYPE_BYTE_ARRAY, -1, offset);
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277 |
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278 | auto_ptr<uint8_t> data(new uint8_t[length]);
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279 | if (!stream->read(data.get(), length*sizeof(uint8_t))) checkStream();
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280 | return data.release();
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281 | }
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282 |
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283 | //------------------------------------------------------------------------------
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284 |
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285 | string XPlane::getString(const char* name, size_t offset) throw(Exception)
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286 | {
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287 | size_t length = 0;
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288 | auto_ptr<uint8_t> data(getByteArray(name, length, offset));
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289 | return string(reinterpret_cast<char*>(data.get()));
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290 | }
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291 |
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292 | //------------------------------------------------------------------------------
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293 |
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294 | void XPlane::setScalar(const char* name, uint8_t type) throw(Exception)
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295 | {
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296 | stream->writeU8(Protocol::COMMAND_SET_SINGLE);
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297 | stream->writeString(name, strlen(name));
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298 | stream->writeU8(type);
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299 | }
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300 |
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301 | //------------------------------------------------------------------------------
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302 |
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303 | void XPlane::setInt(const char* name, int value) throw(Exception)
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304 | {
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305 | setScalar(name, Protocol::TYPE_INT);
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306 | stream->writeS32(value);
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307 | stream->flush();
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308 | checkResult();
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309 | }
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310 |
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311 | //------------------------------------------------------------------------------
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312 |
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313 | void XPlane::setFloat(const char* name, float value) throw(Exception)
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314 | {
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315 | setScalar(name, Protocol::TYPE_FLOAT);
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316 | stream->writeFloat(value);
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317 | stream->flush();
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318 | checkResult();
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319 | }
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320 |
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321 | //------------------------------------------------------------------------------
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322 |
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323 | void XPlane::setDouble(const char* name, double value) throw(Exception)
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324 | {
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325 | setScalar(name, Protocol::TYPE_DOUBLE);
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326 | stream->writeDouble(value);
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327 | stream->flush();
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328 | checkResult();
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329 | }
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330 |
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331 | //------------------------------------------------------------------------------
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332 |
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333 | void XPlane::setArray(const char* name, uint8_t type, size_t length,
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334 | size_t offset) throw(Exception)
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335 | {
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336 | stream->writeU8(Protocol::COMMAND_SET_SINGLE);
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337 | stream->writeString(name, strlen(name));
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338 | stream->writeU8(type);
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339 | stream->writeS32(static_cast<int32_t>(length));
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340 | stream->writeS32(static_cast<int32_t>(offset));
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341 | }
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342 |
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343 | //------------------------------------------------------------------------------
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344 |
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345 | void XPlane::setFloatArray(const char* name, const float* values, size_t length,
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346 | size_t offset) throw(Exception)
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347 | {
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348 | setArray(name, Protocol::TYPE_FLOAT_ARRAY, length, offset);
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349 | stream->write(values, length*sizeof(*values));
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350 | stream->flush();
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351 | checkResult();
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352 | }
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353 |
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354 | //------------------------------------------------------------------------------
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355 |
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356 | void XPlane::setIntArray(const char* name, const int32_t* values, size_t length,
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357 | size_t offset) throw(Exception)
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358 | {
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359 | setArray(name, Protocol::TYPE_INT_ARRAY, length, offset);
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360 | stream->write(values, length*sizeof(*values));
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361 | stream->flush();
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362 | checkResult();
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363 | }
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364 |
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365 | //------------------------------------------------------------------------------
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366 |
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367 | void XPlane::setByteArray(const char* name, const uint8_t* values, size_t length,
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368 | size_t offset) throw(Exception)
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369 | {
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370 | setArray(name, Protocol::TYPE_BYTE_ARRAY, length, offset);
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371 | stream->write(values, length*sizeof(*values));
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372 | stream->flush();
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373 | checkResult();
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374 | }
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375 |
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376 | //------------------------------------------------------------------------------
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377 |
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378 | void XPlane::setString(const char* name, const char* value, size_t length,
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379 | size_t offset) throw(Exception)
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380 | {
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381 | size_t valueLength = strlen(value);
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382 | if ((valueLength+1)>=length) {
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383 | setByteArray(name, reinterpret_cast<const uint8_t*>(value),
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384 | length, offset);
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385 | } else {
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386 | auto_ptr<uint8_t> buffer(new uint8_t[length]);
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387 | memcpy(buffer.get(), value, valueLength);
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388 | memset(buffer.get() + valueLength, 0, length - valueLength);
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389 | setByteArray(name, buffer.get(), length, offset);
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390 | }
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391 | }
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392 | //------------------------------------------------------------------------------
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393 |
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394 | // Local Variables:
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395 | // mode: C++
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396 | // c-basic-offset: 4
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397 | // indent-tabs-mode: nil
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398 | // End:
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