1 | #include "circular_buffer.hpp" |
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2 | |
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3 | #include "linear_buffer_impl.hpp" |
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4 | |
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5 | namespace xmlioserver |
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6 | { |
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7 | namespace comm |
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8 | { |
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9 | /// ////////////////////// Définitions ////////////////////// /// |
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10 | CCircularBuffer::CCircularBuffer(StdSize size) |
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11 | : SuperClass(size), p_write(0), p_read(0), p_unused(0), nbrequest(0) |
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12 | { /* Ne rien faire de plus */ } |
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13 | |
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14 | CCircularBuffer::~CCircularBuffer(void) |
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15 | { /* Ne rien faire de plus */ } |
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16 | |
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17 | ///-------------------------------------------------------------- |
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18 | |
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19 | void CCircularBuffer::clear(void) |
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20 | { |
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21 | this-> p_write = 0; |
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22 | this-> p_read = 0; |
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23 | this-> p_unused = 0; |
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24 | } |
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25 | |
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26 | //------------------------------------------------------------- |
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27 | |
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28 | StdSize CCircularBuffer::getNextRequestSize(void) const |
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29 | { |
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30 | if (!this->hasRequest()) |
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31 | ERROR("CCircularBuffer::getNextRequestSize()", |
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32 | << " invalid call !"); |
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33 | long int nbargs = 0; |
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34 | StdSize startpos = this-> p_read; |
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35 | StdSize currsize = 2 * SuperClass::getRequestedSize(nbargs); |
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36 | nbargs = SuperClass::getInt(startpos + currsize); |
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37 | currsize += SuperClass::getRequestedSize(nbargs); |
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38 | |
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39 | for (long int i = 0; i < nbargs; i++) |
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40 | { |
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41 | CBufferData bufdata; |
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42 | SuperClass::getBufferData(bufdata, currsize); |
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43 | currsize += (bufdata.size + DATA_HEADER_SIZE); |
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44 | } |
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45 | return (currsize); |
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46 | } |
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47 | |
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48 | CLinearBuffer CCircularBuffer::getNextRequest(void) |
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49 | { |
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50 | StdSize startpos = this-> p_read; |
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51 | StdSize currsize = this->getNextRequestSize(); |
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52 | this->movePRead(currsize); |
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53 | this->nbrequest--; |
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54 | return (CLinearBuffer(SuperClass::getData(startpos), currsize)); |
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55 | } |
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56 | |
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57 | //------------------------------------------------------------- |
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58 | |
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59 | void CCircularBuffer::appendRequest(const CLinearBuffer & brequest) |
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60 | { |
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61 | StdSize usedsize = brequest.getUsedSize(); |
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62 | if (!this->isAvailable(usedsize)) |
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63 | ERROR("CCircularBuffer::appendRequest(brequest)", |
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64 | << " invalid call !"); |
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65 | StdSize data_begin = this->prepareNextDataPosition(usedsize); |
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66 | SuperClass::setData(brequest.getData(), usedsize, data_begin); |
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67 | this->updateNbRequests(data_begin, data_begin + usedsize); |
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68 | } |
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69 | |
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70 | //------------------------------------------------------------- |
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71 | |
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72 | char * CCircularBuffer::prepareNextData(StdSize data_size) |
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73 | { |
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74 | return (SuperClass::getData(this->prepareNextDataPosition(data_size))); |
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75 | } |
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76 | |
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77 | |
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78 | StdSize CCircularBuffer::prepareNextDataPosition(StdSize data_size) |
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79 | { |
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80 | StdSize startpos = this-> p_write; |
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81 | if (!this->isAvailable(data_size)) |
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82 | ERROR("CCircularBuffer::prepareNextDataPosition(data_size)", |
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83 | << " invalid call !"); |
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84 | if ((this-> p_write + data_size) > SuperClass::getSize()) |
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85 | startpos = 0; |
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86 | |
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87 | this->movePWrite(data_size); |
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88 | return (startpos); |
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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 | void CCircularBuffer::movePRead(StdSize data_size) |
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94 | { |
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95 | this-> p_read += data_size; |
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96 | if (this-> p_read == this-> p_unused) |
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97 | { |
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98 | this-> p_unused = this-> p_write; |
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99 | this-> p_read = 0; |
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100 | } |
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101 | if (this-> p_read == this-> p_write) |
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102 | this->clear(); |
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103 | } |
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104 | |
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105 | void CCircularBuffer::movePWrite(StdSize data_size) |
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106 | { |
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107 | if ((this-> p_write + data_size) > SuperClass::getSize()) |
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108 | { |
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109 | this-> p_unused = this-> p_write; |
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110 | this-> p_write = data_size; |
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111 | if (this-> p_read < (data_size)) |
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112 | ERROR("CCircularBuffer::movePWrite(data_size)", |
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113 | << " invalid position 1 !"); |
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114 | } |
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115 | else |
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116 | { |
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117 | if ((this-> p_read > this-> p_write) && |
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118 | (this-> p_read < (this-> p_write + data_size))) |
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119 | ERROR("CCircularBuffer::movePWrite(data_size)", |
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120 | << " invalid position 2 !"); |
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121 | this-> p_write += data_size; |
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122 | if (this->p_read < this->p_write) |
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123 | this-> p_unused = this-> p_write; |
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124 | } |
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125 | } |
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126 | |
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127 | //------------------------------------------------------------- |
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128 | |
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129 | bool CCircularBuffer::hasRequest(void) const |
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130 | { return (this->nbrequest != 0); } |
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131 | |
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132 | bool CCircularBuffer::isAvailable(StdSize data_size) const |
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133 | { |
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134 | if (this->p_write == this->p_unused) |
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135 | return (((SuperClass::getSize() - this->p_write) >= data_size) || |
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136 | (this->p_read >= data_size)); |
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137 | else |
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138 | return ((this->p_read - this->p_write) >= data_size); |
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139 | } |
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140 | //--------------------------------------------------------------- |
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141 | |
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142 | void CCircularBuffer::printToTextFile (const StdString & filename) |
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143 | { |
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144 | StdOFStream ofs(filename.c_str()); |
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145 | this->printToTextStream(ofs); |
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146 | ofs.close(); |
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147 | } |
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148 | |
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149 | void CCircularBuffer::printToTextStream (StdOStream & ostr) |
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150 | { |
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151 | StdSize _p_write = p_write, |
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152 | _p_read = p_read, |
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153 | _p_unused = p_unused, |
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154 | _nbrequest = nbrequest; |
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155 | |
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156 | while (this->hasRequest()) |
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157 | { |
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158 | this->getNextRequest().printToTextStream(ostr); |
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159 | ostr << std::endl; |
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160 | } |
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161 | |
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162 | p_write = _p_write; |
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163 | p_read = _p_read; |
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164 | p_unused = _p_unused; |
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165 | nbrequest = _nbrequest; |
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166 | } |
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167 | |
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168 | //--------------------------------------------------------------- |
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169 | |
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170 | StdSize CCircularBuffer::getNumberOfRequest(void) const |
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171 | { return (this->nbrequest); } |
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172 | |
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173 | StdSize CCircularBuffer::getReadPosition(void) const |
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174 | { return (this->p_read); } |
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175 | |
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176 | StdSize CCircularBuffer::getWritePosition(void) const |
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177 | { return (this->p_write); } |
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178 | |
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179 | StdSize CCircularBuffer::getUnusedPosition(void) const |
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180 | { return (this->p_unused); } |
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181 | |
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182 | //--------------------------------------------------------------- |
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183 | |
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184 | void CCircularBuffer::updateNbRequests(StdSize data_begin, StdSize data_end) |
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185 | { |
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186 | StdSize position = data_begin; |
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187 | while (position != data_end) |
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188 | { |
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189 | this->nbrequest++; |
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190 | position = SuperClass::getNextDataPosition(position); // manager id |
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191 | position = SuperClass::getNextDataPosition(position); // method id |
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192 | long int nbarg = SuperClass::getInt(position); |
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193 | position = SuperClass::getNextDataPosition(position); |
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194 | for (long int i = 0; i < nbarg; i++) |
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195 | position = SuperClass::getNextDataPosition(position); |
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196 | } |
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197 | } |
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198 | |
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199 | ///------------------------------------------------------------ |
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200 | } // namespace tree |
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201 | } // namespace xmlioserver |
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202 | |
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