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<li class="navelem"><a class="el" href="dir_1878a3f4746a95c6aad317458cc7ef80.html">boost</a></li><li class="navelem"><a class="el" href="dir_ab65964b154f94b8b1ef0b053897b905.html">nowide</a></li><li class="navelem"><a class="el" href="dir_6de37c9759f3b231287b6a4ec502d447.html">utf</a></li> </ul>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">//</span></div><div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment">// Copyright (c) 2009-2011 Artyom Beilis (Tonkikh)</span></div><div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment">// Copyright (c) 2020 Alexander Grund</span></div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment">//</span></div><div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment">// Distributed under the Boost Software License, Version 1.0. (See</span></div><div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment">// accompanying file LICENSE or copy at</span></div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment">// http://www.boost.org/LICENSE_1_0.txt)</span></div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment">//</span></div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="preprocessor">#ifndef BOOST_NOWIDE_UTF_HPP_INCLUDED</span></div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="preprocessor">#define BOOST_NOWIDE_UTF_HPP_INCLUDED</span></div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span> </div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="preprocessor">#include <<a class="code" href="config_8hpp.html">boost/nowide/config.hpp</a>></span></div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="preprocessor">#include <cstdint></span></div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> </div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="keyword">namespace </span>boost {</div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="keyword">namespace </span>nowide {</div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span>  <span class="keyword">namespace </span><a class="code" href="namespaceboost_1_1nowide_1_1utf.html">utf</a> {</div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span> </div><div class="line"><a name="l00028"></a><span class="lineno"><a class="line" href="namespaceboost_1_1nowide_1_1utf.html#a4bd651000593bf73be05d50278e2c1e3"> 28</a></span>  <span class="keyword">using</span> <a class="code" href="namespaceboost_1_1nowide_1_1utf.html#a4bd651000593bf73be05d50278e2c1e3">code_point</a> = uint32_t;</div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span> </div><div class="line"><a name="l00033"></a><span class="lineno"><a class="line" href="namespaceboost_1_1nowide_1_1utf.html#aaaf1f34f7f0c7d3c98f6896e737873ae"> 33</a></span>  <span class="keyword">static</span> <span class="keyword">const</span> <a class="code" href="namespaceboost_1_1nowide_1_1utf.html#a4bd651000593bf73be05d50278e2c1e3">code_point</a> <a class="code" href="namespaceboost_1_1nowide_1_1utf.html#aaaf1f34f7f0c7d3c98f6896e737873ae">illegal</a> = 0xFFFFFFFFu;</div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span> </div><div class="line"><a name="l00038"></a><span class="lineno"><a class="line" href="namespaceboost_1_1nowide_1_1utf.html#a80a0fd866c8fa2791c400dc501a4e25f"> 38</a></span>  <span class="keyword">static</span> <span class="keyword">const</span> <a class="code" href="namespaceboost_1_1nowide_1_1utf.html#a4bd651000593bf73be05d50278e2c1e3">code_point</a> <a class="code" href="namespaceboost_1_1nowide_1_1utf.html#a80a0fd866c8fa2791c400dc501a4e25f">incomplete</a> = 0xFFFFFFFEu;</div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span> </div><div class="line"><a name="l00043"></a><span class="lineno"><a class="line" href="namespaceboost_1_1nowide_1_1utf.html#a36d7b6788f08461409fbfbba8af8b0a4"> 43</a></span>  <span class="keyword">inline</span> <span class="keywordtype">bool</span> <a class="code" href="namespaceboost_1_1nowide_1_1utf.html#a36d7b6788f08461409fbfbba8af8b0a4">is_valid_codepoint</a>(<a class="code" href="namespaceboost_1_1nowide_1_1utf.html#a4bd651000593bf73be05d50278e2c1e3">code_point</a> v)</div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  {</div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  <span class="keywordflow">if</span>(v > 0x10FFFF)</div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  <span class="keywordflow">if</span>(0xD800 <= v && v <= 0xDFFF) <span class="comment">// surrogates</span></div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  }</div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span> </div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="preprocessor">#ifdef BOOST_NOWIDE_DOXYGEN</span></div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  <span class="keyword">template</span><<span class="keyword">typename</span> CharType, <span class="keywordtype">int</span> size = sizeof(CharType)></div><div class="line"><a name="l00057"></a><span class="lineno"><a class="line" href="structboost_1_1nowide_1_1utf_1_1utf__traits.html"> 57</a></span>  <span class="keyword">struct </span><a class="code" href="structboost_1_1nowide_1_1utf_1_1utf__traits.html">utf_traits</a></div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  {</div><div class="line"><a name="l00062"></a><span class="lineno"><a class="line" href="structboost_1_1nowide_1_1utf_1_1utf__traits.html#a863c63ad123870327ccdaf7ac4b772b0"> 62</a></span>  <span class="keyword">using</span> <a class="code" href="structboost_1_1nowide_1_1utf_1_1utf__traits.html#a863c63ad123870327ccdaf7ac4b772b0">char_type</a> = CharType;</div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  <span class="keyword">template</span><<span class="keyword">typename</span> Iterator></div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  <span class="keyword">static</span> <a class="code" href="namespaceboost_1_1nowide_1_1utf.html#a4bd651000593bf73be05d50278e2c1e3">code_point</a> <a class="code" href="structboost_1_1nowide_1_1utf_1_1utf__traits.html#a0fbc086e7c1640206ee55c4a467c1ea3">decode</a>(Iterator& p, Iterator e);</div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span> </div><div class="line"><a name="l00087"></a><span class="lineno"><a class="line" href="structboost_1_1nowide_1_1utf_1_1utf__traits.html#a7303fdc81c42e30c779aa1805c40da19"> 87</a></span>  <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="structboost_1_1nowide_1_1utf_1_1utf__traits.html#a7303fdc81c42e30c779aa1805c40da19">max_width</a>;</div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  <span class="keyword">static</span> <span class="keywordtype">int</span> <a class="code" href="structboost_1_1nowide_1_1utf_1_1utf__traits.html#ad16265222c92f2efdacabf0efc32117d">width</a>(<a class="code" href="namespaceboost_1_1nowide_1_1utf.html#a4bd651000593bf73be05d50278e2c1e3">code_point</a> value);</div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span> </div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  <span class="keyword">static</span> <span class="keywordtype">int</span> <a class="code" href="structboost_1_1nowide_1_1utf_1_1utf__traits.html#a65e054f4d5b47d82fa1f6716a8ab3060">trail_length</a>(<a class="code" href="structboost_1_1nowide_1_1utf_1_1utf__traits.html#a863c63ad123870327ccdaf7ac4b772b0">char_type</a> c);</div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  <span class="keyword">static</span> <span class="keywordtype">bool</span> <a class="code" href="structboost_1_1nowide_1_1utf_1_1utf__traits.html#a40da5af3bb0fd5e02180f2414ef46a66">is_trail</a>(<a class="code" href="structboost_1_1nowide_1_1utf_1_1utf__traits.html#a863c63ad123870327ccdaf7ac4b772b0">char_type</a> c);</div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  <span class="keyword">static</span> <span class="keywordtype">bool</span> <a class="code" href="structboost_1_1nowide_1_1utf_1_1utf__traits.html#a9a8a8d715a787da7a310b5ea714da7a8">is_lead</a>(<a class="code" href="structboost_1_1nowide_1_1utf_1_1utf__traits.html#a863c63ad123870327ccdaf7ac4b772b0">char_type</a> c);</div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span> </div><div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  <span class="keyword">template</span><<span class="keyword">typename</span> Iterator></div><div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  <span class="keyword">static</span> Iterator <a class="code" href="structboost_1_1nowide_1_1utf_1_1utf__traits.html#a72a312248fc248101ea00af58eb7e835">encode</a>(<a class="code" href="namespaceboost_1_1nowide_1_1utf.html#a4bd651000593bf73be05d50278e2c1e3">code_point</a> value, Iterator out);</div><div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  <span class="keyword">template</span><<span class="keyword">typename</span> Iterator></div><div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  <span class="keyword">static</span> <a class="code" href="namespaceboost_1_1nowide_1_1utf.html#a4bd651000593bf73be05d50278e2c1e3">code_point</a> <a class="code" href="structboost_1_1nowide_1_1utf_1_1utf__traits.html#a64a7b1b32712dde6459d19ee888d3c7b">decode_valid</a>(Iterator& p);</div><div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  };</div><div class="line"><a name="l00131"></a><span class="lineno"> 131</span> </div><div class="line"><a name="l00132"></a><span class="lineno"> 132</span> <span class="preprocessor">#else</span></div><div class="line"><a name="l00133"></a><span class="lineno"> 133</span> </div><div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  <span class="keyword">template</span><<span class="keyword">typename</span> CharType, <span class="keywordtype">int</span> size = sizeof(CharType)></div><div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  <span class="keyword">struct </span><a class="code" href="structboost_1_1nowide_1_1utf_1_1utf__traits.html">utf_traits</a>;</div><div class="line"><a name="l00136"></a><span class="lineno"> 136</span> </div><div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  <span class="keyword">template</span><<span class="keyword">typename</span> CharType></div><div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  <span class="keyword">struct </span><a class="code" href="structboost_1_1nowide_1_1utf_1_1utf__traits.html">utf_traits</a><CharType, 1></div><div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  {</div><div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  <span class="keyword">using</span> <a class="code" href="structboost_1_1nowide_1_1utf_1_1utf__traits.html#a863c63ad123870327ccdaf7ac4b772b0">char_type</a> = CharType;</div><div class="line"><a name="l00141"></a><span class="lineno"> 141</span> </div><div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  <span class="keyword">static</span> <span class="keywordtype">int</span> <a class="code" href="structboost_1_1nowide_1_1utf_1_1utf__traits.html#a65e054f4d5b47d82fa1f6716a8ab3060">trail_length</a>(<a class="code" href="structboost_1_1nowide_1_1utf_1_1utf__traits.html#a863c63ad123870327ccdaf7ac4b772b0">char_type</a> ci)</div><div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  {</div><div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> c = ci;</div><div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  <span class="keywordflow">if</span>(c < 128)</div><div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  <span class="keywordflow">return</span> 0;</div><div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  <span class="keywordflow">if</span>(BOOST_UNLIKELY(c < 194))</div><div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  <span class="keywordflow">return</span> -1;</div><div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  <span class="keywordflow">if</span>(c < 224)</div><div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  <span class="keywordflow">return</span> 1;</div><div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  <span class="keywordflow">if</span>(c < 240)</div><div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  <span class="keywordflow">return</span> 2;</div><div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  <span class="keywordflow">if</span>(BOOST_LIKELY(c <= 244))</div><div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  <span class="keywordflow">return</span> 3;</div><div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  <span class="keywordflow">return</span> -1;</div><div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  }</div><div class="line"><a name="l00157"></a><span class="lineno"> 157</span> </div><div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="structboost_1_1nowide_1_1utf_1_1utf__traits.html#a7303fdc81c42e30c779aa1805c40da19">max_width</a> = 4;</div><div class="line"><a name="l00159"></a><span class="lineno"> 159</span> </div><div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  <span class="keyword">static</span> <span class="keywordtype">int</span> <a class="code" href="structboost_1_1nowide_1_1utf_1_1utf__traits.html#ad16265222c92f2efdacabf0efc32117d">width</a>(<a class="code" href="namespaceboost_1_1nowide_1_1utf.html#a4bd651000593bf73be05d50278e2c1e3">code_point</a> value)</div><div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  {</div><div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  <span class="keywordflow">if</span>(value <= 0x7F)</div><div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  {</div><div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  <span class="keywordflow">return</span> 1;</div><div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span>(value <= 0x7FF)</div><div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  {</div><div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  <span class="keywordflow">return</span> 2;</div><div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span>(BOOST_LIKELY(value <= 0xFFFF))</div><div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  {</div><div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  <span class="keywordflow">return</span> 3;</div><div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  } <span class="keywordflow">else</span></div><div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  {</div><div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  <span class="keywordflow">return</span> 4;</div><div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  }</div><div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  }</div><div class="line"><a name="l00176"></a><span class="lineno"> 176</span> </div><div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  <span class="keyword">static</span> <span class="keywordtype">bool</span> <a class="code" href="structboost_1_1nowide_1_1utf_1_1utf__traits.html#a40da5af3bb0fd5e02180f2414ef46a66">is_trail</a>(<a class="code" href="structboost_1_1nowide_1_1utf_1_1utf__traits.html#a863c63ad123870327ccdaf7ac4b772b0">char_type</a> ci)</div><div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  {</div><div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> c = ci;</div><div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  <span class="keywordflow">return</span> (c & 0xC0) == 0x80;</div><div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  }</div><div class="line"><a name="l00182"></a><span class="lineno"> 182</span> </div><div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  <span class="keyword">static</span> <span class="keywordtype">bool</span> <a class="code" href="structboost_1_1nowide_1_1utf_1_1utf__traits.html#a9a8a8d715a787da7a310b5ea714da7a8">is_lead</a>(<a class="code" href="structboost_1_1nowide_1_1utf_1_1utf__traits.html#a863c63ad123870327ccdaf7ac4b772b0">char_type</a> ci)</div><div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  {</div><div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  <span class="keywordflow">return</span> !<a class="code" href="structboost_1_1nowide_1_1utf_1_1utf__traits.html#a40da5af3bb0fd5e02180f2414ef46a66">is_trail</a>(ci);</div><div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  }</div><div class="line"><a name="l00187"></a><span class="lineno"> 187</span> </div><div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  <span class="keyword">template</span><<span class="keyword">typename</span> Iterator></div><div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  <span class="keyword">static</span> <a class="code" href="namespaceboost_1_1nowide_1_1utf.html#a4bd651000593bf73be05d50278e2c1e3">code_point</a> <a class="code" href="structboost_1_1nowide_1_1utf_1_1utf__traits.html#a0fbc086e7c1640206ee55c4a467c1ea3">decode</a>(Iterator& p, Iterator e)</div><div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  {</div><div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  <span class="keywordflow">if</span>(BOOST_UNLIKELY(p == e))</div><div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  <span class="keywordflow">return</span> <a class="code" href="namespaceboost_1_1nowide_1_1utf.html#a80a0fd866c8fa2791c400dc501a4e25f">incomplete</a>;</div><div class="line"><a name="l00193"></a><span class="lineno"> 193</span> </div><div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> lead = *p++;</div><div class="line"><a name="l00195"></a><span class="lineno"> 195</span> </div><div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  <span class="comment">// First byte is fully validated here</span></div><div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  <span class="keywordtype">int</span> trail_size = <a class="code" href="structboost_1_1nowide_1_1utf_1_1utf__traits.html#a65e054f4d5b47d82fa1f6716a8ab3060">trail_length</a>(lead);</div><div class="line"><a name="l00198"></a><span class="lineno"> 198</span> </div><div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  <span class="keywordflow">if</span>(BOOST_UNLIKELY(trail_size < 0))</div><div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  <span class="keywordflow">return</span> <a class="code" href="namespaceboost_1_1nowide_1_1utf.html#aaaf1f34f7f0c7d3c98f6896e737873ae">illegal</a>;</div><div class="line"><a name="l00201"></a><span class="lineno"> 201</span> </div><div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  <span class="comment">// OK as only ASCII may be of size = 0</span></div><div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  <span class="comment">// also optimize for ASCII text</span></div><div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  <span class="keywordflow">if</span>(trail_size == 0)</div><div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  <span class="keywordflow">return</span> lead;</div><div class="line"><a name="l00206"></a><span class="lineno"> 206</span> </div><div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  <a class="code" href="namespaceboost_1_1nowide_1_1utf.html#a4bd651000593bf73be05d50278e2c1e3">code_point</a> c = lead & ((1 << (6 - trail_size)) - 1);</div><div class="line"><a name="l00208"></a><span class="lineno"> 208</span> </div><div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  <span class="comment">// Read the rest</span></div><div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> tmp;</div><div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  <span class="keywordflow">switch</span>(trail_size)</div><div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  {</div><div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  <span class="keywordflow">case</span> 3:</div><div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  <span class="keywordflow">if</span>(BOOST_UNLIKELY(p == e))</div><div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  <span class="keywordflow">return</span> <a class="code" href="namespaceboost_1_1nowide_1_1utf.html#a80a0fd866c8fa2791c400dc501a4e25f">incomplete</a>;</div><div class="line"><a name="l00216"></a><span class="lineno"> 216</span>  tmp = *p++;</div><div class="line"><a name="l00217"></a><span class="lineno"> 217</span>  <span class="keywordflow">if</span>(!<a class="code" href="structboost_1_1nowide_1_1utf_1_1utf__traits.html#a40da5af3bb0fd5e02180f2414ef46a66">is_trail</a>(tmp))</div><div class="line"><a name="l00218"></a><span class="lineno"> 218</span>  <span class="keywordflow">return</span> <a class="code" href="namespaceboost_1_1nowide_1_1utf.html#aaaf1f34f7f0c7d3c98f6896e737873ae">illegal</a>;</div><div class="line"><a name="l00219"></a><span class="lineno"> 219</span>  c = (c << 6) | (tmp & 0x3F);</div><div class="line"><a name="l00220"></a><span class="lineno"> 220</span>  BOOST_NOWIDE_FALLTHROUGH;</div><div class="line"><a name="l00221"></a><span class="lineno"> 221</span>  <span class="keywordflow">case</span> 2:</div><div class="line"><a name="l00222"></a><span class="lineno"> 222</span>  <span class="keywordflow">if</span>(BOOST_UNLIKELY(p == e))</div><div class="line"><a name="l00223"></a><span class="lineno"> 223</span>  <span class="keywordflow">return</span> <a class="code" href="namespaceboost_1_1nowide_1_1utf.html#a80a0fd866c8fa2791c400dc501a4e25f">incomplete</a>;</div><div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  tmp = *p++;</div><div class="line"><a name="l00225"></a><span class="lineno"> 225</span>  <span class="keywordflow">if</span>(!<a class="code" href="structboost_1_1nowide_1_1utf_1_1utf__traits.html#a40da5af3bb0fd5e02180f2414ef46a66">is_trail</a>(tmp))</div><div class="line"><a name="l00226"></a><span class="lineno"> 226</span>  <span class="keywordflow">return</span> <a class="code" href="namespaceboost_1_1nowide_1_1utf.html#aaaf1f34f7f0c7d3c98f6896e737873ae">illegal</a>;</div><div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  c = (c << 6) | (tmp & 0x3F);</div><div class="line"><a name="l00228"></a><span class="lineno"> 228</span>  BOOST_NOWIDE_FALLTHROUGH;</div><div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  <span class="keywordflow">case</span> 1:</div><div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  <span class="keywordflow">if</span>(BOOST_UNLIKELY(p == e))</div><div class="line"><a name="l00231"></a><span class="lineno"> 231</span>  <span class="keywordflow">return</span> <a class="code" href="namespaceboost_1_1nowide_1_1utf.html#a80a0fd866c8fa2791c400dc501a4e25f">incomplete</a>;</div><div class="line"><a name="l00232"></a><span class="lineno"> 232</span>  tmp = *p++;</div><div class="line"><a name="l00233"></a><span class="lineno"> 233</span>  <span class="keywordflow">if</span>(!<a class="code" href="structboost_1_1nowide_1_1utf_1_1utf__traits.html#a40da5af3bb0fd5e02180f2414ef46a66">is_trail</a>(tmp))</div><div class="line"><a name="l00234"></a><span class="lineno"> 234</span>  <span class="keywordflow">return</span> <a class="code" href="namespaceboost_1_1nowide_1_1utf.html#aaaf1f34f7f0c7d3c98f6896e737873ae">illegal</a>;</div><div class="line"><a name="l00235"></a><span class="lineno"> 235</span>  c = (c << 6) | (tmp & 0x3F);</div><div class="line"><a name="l00236"></a><span class="lineno"> 236</span>  }</div><div class="line"><a name="l00237"></a><span class="lineno"> 237</span> </div><div class="line"><a name="l00238"></a><span class="lineno"> 238</span>  <span class="comment">// Check code point validity:</span></div><div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  <span class="comment">// - no surrogates and valid range</span></div><div class="line"><a name="l00240"></a><span class="lineno"> 240</span>  <span class="comment">// - most compact representation</span></div><div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  <span class="keywordflow">if</span>(BOOST_UNLIKELY(!<a class="code" href="namespaceboost_1_1nowide_1_1utf.html#a36d7b6788f08461409fbfbba8af8b0a4">is_valid_codepoint</a>(c)) || BOOST_UNLIKELY(<a class="code" href="structboost_1_1nowide_1_1utf_1_1utf__traits.html#ad16265222c92f2efdacabf0efc32117d">width</a>(c) != trail_size + 1))</div><div class="line"><a name="l00242"></a><span class="lineno"> 242</span>  {</div><div class="line"><a name="l00243"></a><span class="lineno"> 243</span>  p -= trail_size;</div><div class="line"><a name="l00244"></a><span class="lineno"> 244</span>  <span class="keywordflow">return</span> <a class="code" href="namespaceboost_1_1nowide_1_1utf.html#aaaf1f34f7f0c7d3c98f6896e737873ae">illegal</a>;</div><div class="line"><a name="l00245"></a><span class="lineno"> 245</span>  }</div><div class="line"><a name="l00246"></a><span class="lineno"> 246</span> </div><div class="line"><a name="l00247"></a><span class="lineno"> 247</span>  <span class="keywordflow">return</span> c;</div><div class="line"><a name="l00248"></a><span class="lineno"> 248</span>  }</div><div class="line"><a name="l00249"></a><span class="lineno"> 249</span> </div><div class="line"><a name="l00250"></a><span class="lineno"> 250</span>  <span class="keyword">template</span><<span class="keyword">typename</span> Iterator></div><div class="line"><a name="l00251"></a><span class="lineno"> 251</span>  <span class="keyword">static</span> <a class="code" href="namespaceboost_1_1nowide_1_1utf.html#a4bd651000593bf73be05d50278e2c1e3">code_point</a> <a class="code" href="structboost_1_1nowide_1_1utf_1_1utf__traits.html#a64a7b1b32712dde6459d19ee888d3c7b">decode_valid</a>(Iterator& p)</div><div class="line"><a name="l00252"></a><span class="lineno"> 252</span>  {</div><div class="line"><a name="l00253"></a><span class="lineno"> 253</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> lead = *p++;</div><div class="line"><a name="l00254"></a><span class="lineno"> 254</span>  <span class="keywordflow">if</span>(lead < 192)</div><div class="line"><a name="l00255"></a><span class="lineno"> 255</span>  <span class="keywordflow">return</span> lead;</div><div class="line"><a name="l00256"></a><span class="lineno"> 256</span> </div><div class="line"><a name="l00257"></a><span class="lineno"> 257</span>  <span class="keywordtype">int</span> trail_size;</div><div class="line"><a name="l00258"></a><span class="lineno"> 258</span> </div><div class="line"><a name="l00259"></a><span class="lineno"> 259</span>  <span class="keywordflow">if</span>(lead < 224)</div><div class="line"><a name="l00260"></a><span class="lineno"> 260</span>  trail_size = 1;</div><div class="line"><a name="l00261"></a><span class="lineno"> 261</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span>(BOOST_LIKELY(lead < 240)) <span class="comment">// non-BMP rare</span></div><div class="line"><a name="l00262"></a><span class="lineno"> 262</span>  trail_size = 2;</div><div class="line"><a name="l00263"></a><span class="lineno"> 263</span>  <span class="keywordflow">else</span></div><div class="line"><a name="l00264"></a><span class="lineno"> 264</span>  trail_size = 3;</div><div class="line"><a name="l00265"></a><span class="lineno"> 265</span> </div><div class="line"><a name="l00266"></a><span class="lineno"> 266</span>  <a class="code" href="namespaceboost_1_1nowide_1_1utf.html#a4bd651000593bf73be05d50278e2c1e3">code_point</a> c = lead & ((1 << (6 - trail_size)) - 1);</div><div class="line"><a name="l00267"></a><span class="lineno"> 267</span> </div><div class="line"><a name="l00268"></a><span class="lineno"> 268</span>  <span class="keywordflow">switch</span>(trail_size)</div><div class="line"><a name="l00269"></a><span class="lineno"> 269</span>  {</div><div class="line"><a name="l00270"></a><span class="lineno"> 270</span>  <span class="keywordflow">case</span> 3: c = (c << 6) | (static_cast<unsigned char>(*p++) & 0x3F); BOOST_NOWIDE_FALLTHROUGH;</div><div class="line"><a name="l00271"></a><span class="lineno"> 271</span>  <span class="keywordflow">case</span> 2: c = (c << 6) | (static_cast<unsigned char>(*p++) & 0x3F); BOOST_NOWIDE_FALLTHROUGH;</div><div class="line"><a name="l00272"></a><span class="lineno"> 272</span>  <span class="keywordflow">case</span> 1: c = (c << 6) | (static_cast<unsigned char>(*p++) & 0x3F);</div><div class="line"><a name="l00273"></a><span class="lineno"> 273</span>  }</div><div class="line"><a name="l00274"></a><span class="lineno"> 274</span> </div><div class="line"><a name="l00275"></a><span class="lineno"> 275</span>  <span class="keywordflow">return</span> c;</div><div class="line"><a name="l00276"></a><span class="lineno"> 276</span>  }</div><div class="line"><a name="l00277"></a><span class="lineno"> 277</span> </div><div class="line"><a name="l00278"></a><span class="lineno"> 278</span>  <span class="keyword">template</span><<span class="keyword">typename</span> Iterator></div><div class="line"><a name="l00279"></a><span class="lineno"> 279</span>  <span class="keyword">static</span> Iterator <a class="code" href="structboost_1_1nowide_1_1utf_1_1utf__traits.html#a72a312248fc248101ea00af58eb7e835">encode</a>(<a class="code" href="namespaceboost_1_1nowide_1_1utf.html#a4bd651000593bf73be05d50278e2c1e3">code_point</a> value, Iterator out)</div><div class="line"><a name="l00280"></a><span class="lineno"> 280</span>  {</div><div class="line"><a name="l00281"></a><span class="lineno"> 281</span>  <span class="keywordflow">if</span>(value <= 0x7F)</div><div class="line"><a name="l00282"></a><span class="lineno"> 282</span>  {</div><div class="line"><a name="l00283"></a><span class="lineno"> 283</span>  *out++ = static_cast<char_type>(value);</div><div class="line"><a name="l00284"></a><span class="lineno"> 284</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span>(value <= 0x7FF)</div><div class="line"><a name="l00285"></a><span class="lineno"> 285</span>  {</div><div class="line"><a name="l00286"></a><span class="lineno"> 286</span>  *out++ = static_cast<char_type>((value >> 6) | 0xC0);</div><div class="line"><a name="l00287"></a><span class="lineno"> 287</span>  *out++ = static_cast<char_type>((value & 0x3F) | 0x80);</div><div class="line"><a name="l00288"></a><span class="lineno"> 288</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span>(BOOST_LIKELY(value <= 0xFFFF))</div><div class="line"><a name="l00289"></a><span class="lineno"> 289</span>  {</div><div class="line"><a name="l00290"></a><span class="lineno"> 290</span>  *out++ = static_cast<char_type>((value >> 12) | 0xE0);</div><div class="line"><a name="l00291"></a><span class="lineno"> 291</span>  *out++ = static_cast<char_type>(((value >> 6) & 0x3F) | 0x80);</div><div class="line"><a name="l00292"></a><span class="lineno"> 292</span>  *out++ = static_cast<char_type>((value & 0x3F) | 0x80);</div><div class="line"><a name="l00293"></a><span class="lineno"> 293</span>  } <span class="keywordflow">else</span></div><div class="line"><a name="l00294"></a><span class="lineno"> 294</span>  {</div><div class="line"><a name="l00295"></a><span class="lineno"> 295</span>  *out++ = static_cast<char_type>((value >> 18) | 0xF0);</div><div class="line"><a name="l00296"></a><span class="lineno"> 296</span>  *out++ = static_cast<char_type>(((value >> 12) & 0x3F) | 0x80);</div><div class="line"><a name="l00297"></a><span class="lineno"> 297</span>  *out++ = static_cast<char_type>(((value >> 6) & 0x3F) | 0x80);</div><div class="line"><a name="l00298"></a><span class="lineno"> 298</span>  *out++ = static_cast<char_type>((value & 0x3F) | 0x80);</div><div class="line"><a name="l00299"></a><span class="lineno"> 299</span>  }</div><div class="line"><a name="l00300"></a><span class="lineno"> 300</span>  <span class="keywordflow">return</span> out;</div><div class="line"><a name="l00301"></a><span class="lineno"> 301</span>  }</div><div class="line"><a name="l00302"></a><span class="lineno"> 302</span>  }; <span class="comment">// utf8</span></div><div class="line"><a name="l00303"></a><span class="lineno"> 303</span> </div><div class="line"><a name="l00304"></a><span class="lineno"> 304</span>  <span class="keyword">template</span><<span class="keyword">typename</span> CharType></div><div class="line"><a name="l00305"></a><span class="lineno"> 305</span>  <span class="keyword">struct </span>utf_traits<CharType, 2></div><div class="line"><a name="l00306"></a><span class="lineno"> 306</span>  {</div><div class="line"><a name="l00307"></a><span class="lineno"> 307</span>  <span class="keyword">using</span> <a class="code" href="structboost_1_1nowide_1_1utf_1_1utf__traits.html#a863c63ad123870327ccdaf7ac4b772b0">char_type</a> = CharType;</div><div class="line"><a name="l00308"></a><span class="lineno"> 308</span> </div><div class="line"><a name="l00309"></a><span class="lineno"> 309</span>  <span class="comment">// See RFC 2781</span></div><div class="line"><a name="l00310"></a><span class="lineno"> 310</span>  <span class="keyword">static</span> <span class="keywordtype">bool</span> is_first_surrogate(uint16_t x)</div><div class="line"><a name="l00311"></a><span class="lineno"> 311</span>  {</div><div class="line"><a name="l00312"></a><span class="lineno"> 312</span>  <span class="keywordflow">return</span> 0xD800 <= x && x <= 0xDBFF;</div><div class="line"><a name="l00313"></a><span class="lineno"> 313</span>  }</div><div class="line"><a name="l00314"></a><span class="lineno"> 314</span>  <span class="keyword">static</span> <span class="keywordtype">bool</span> is_second_surrogate(uint16_t x)</div><div class="line"><a name="l00315"></a><span class="lineno"> 315</span>  {</div><div class="line"><a name="l00316"></a><span class="lineno"> 316</span>  <span class="keywordflow">return</span> 0xDC00 <= x && x <= 0xDFFF;</div><div class="line"><a name="l00317"></a><span class="lineno"> 317</span>  }</div><div class="line"><a name="l00318"></a><span class="lineno"> 318</span>  <span class="keyword">static</span> <a class="code" href="namespaceboost_1_1nowide_1_1utf.html#a4bd651000593bf73be05d50278e2c1e3">code_point</a> combine_surrogate(uint16_t w1, uint16_t w2)</div><div class="line"><a name="l00319"></a><span class="lineno"> 319</span>  {</div><div class="line"><a name="l00320"></a><span class="lineno"> 320</span>  <span class="keywordflow">return</span> ((<a class="code" href="namespaceboost_1_1nowide_1_1utf.html#a4bd651000593bf73be05d50278e2c1e3">code_point</a>(w1 & 0x3FF) << 10) | (w2 & 0x3FF)) + 0x10000;</div><div class="line"><a name="l00321"></a><span class="lineno"> 321</span>  }</div><div class="line"><a name="l00322"></a><span class="lineno"> 322</span>  <span class="keyword">static</span> <span class="keywordtype">int</span> <a class="code" href="structboost_1_1nowide_1_1utf_1_1utf__traits.html#a65e054f4d5b47d82fa1f6716a8ab3060">trail_length</a>(<a class="code" href="structboost_1_1nowide_1_1utf_1_1utf__traits.html#a863c63ad123870327ccdaf7ac4b772b0">char_type</a> c)</div><div class="line"><a name="l00323"></a><span class="lineno"> 323</span>  {</div><div class="line"><a name="l00324"></a><span class="lineno"> 324</span>  <span class="keywordflow">if</span>(is_first_surrogate(c))</div><div class="line"><a name="l00325"></a><span class="lineno"> 325</span>  <span class="keywordflow">return</span> 1;</div><div class="line"><a name="l00326"></a><span class="lineno"> 326</span>  <span class="keywordflow">if</span>(is_second_surrogate(c))</div><div class="line"><a name="l00327"></a><span class="lineno"> 327</span>  <span class="keywordflow">return</span> -1;</div><div class="line"><a name="l00328"></a><span class="lineno"> 328</span>  <span class="keywordflow">return</span> 0;</div><div class="line"><a name="l00329"></a><span class="lineno"> 329</span>  }</div><div class="line"><a name="l00333"></a><span class="lineno"> 333</span>  <span class="keyword">static</span> <span class="keywordtype">bool</span> <a class="code" href="structboost_1_1nowide_1_1utf_1_1utf__traits.html#a40da5af3bb0fd5e02180f2414ef46a66">is_trail</a>(<a class="code" href="structboost_1_1nowide_1_1utf_1_1utf__traits.html#a863c63ad123870327ccdaf7ac4b772b0">char_type</a> c)</div><div class="line"><a name="l00334"></a><span class="lineno"> 334</span>  {</div><div class="line"><a name="l00335"></a><span class="lineno"> 335</span>  <span class="keywordflow">return</span> is_second_surrogate(c);</div><div class="line"><a name="l00336"></a><span class="lineno"> 336</span>  }</div><div class="line"><a name="l00340"></a><span class="lineno"> 340</span>  <span class="keyword">static</span> <span class="keywordtype">bool</span> <a class="code" href="structboost_1_1nowide_1_1utf_1_1utf__traits.html#a9a8a8d715a787da7a310b5ea714da7a8">is_lead</a>(<a class="code" href="structboost_1_1nowide_1_1utf_1_1utf__traits.html#a863c63ad123870327ccdaf7ac4b772b0">char_type</a> c)</div><div class="line"><a name="l00341"></a><span class="lineno"> 341</span>  {</div><div class="line"><a name="l00342"></a><span class="lineno"> 342</span>  <span class="keywordflow">return</span> !is_second_surrogate(c);</div><div class="line"><a name="l00343"></a><span class="lineno"> 343</span>  }</div><div class="line"><a name="l00344"></a><span class="lineno"> 344</span> </div><div class="line"><a name="l00345"></a><span class="lineno"> 345</span>  <span class="keyword">template</span><<span class="keyword">typename</span> It></div><div class="line"><a name="l00346"></a><span class="lineno"> 346</span>  <span class="keyword">static</span> <a class="code" href="namespaceboost_1_1nowide_1_1utf.html#a4bd651000593bf73be05d50278e2c1e3">code_point</a> <a class="code" href="structboost_1_1nowide_1_1utf_1_1utf__traits.html#a0fbc086e7c1640206ee55c4a467c1ea3">decode</a>(It& current, It last)</div><div class="line"><a name="l00347"></a><span class="lineno"> 347</span>  {</div><div class="line"><a name="l00348"></a><span class="lineno"> 348</span>  <span class="keywordflow">if</span>(BOOST_UNLIKELY(current == last))</div><div class="line"><a name="l00349"></a><span class="lineno"> 349</span>  <span class="keywordflow">return</span> <a class="code" href="namespaceboost_1_1nowide_1_1utf.html#a80a0fd866c8fa2791c400dc501a4e25f">incomplete</a>;</div><div class="line"><a name="l00350"></a><span class="lineno"> 350</span>  uint16_t w1 = *current++;</div><div class="line"><a name="l00351"></a><span class="lineno"> 351</span>  <span class="keywordflow">if</span>(BOOST_LIKELY(w1 < 0xD800 || 0xDFFF < w1))</div><div class="line"><a name="l00352"></a><span class="lineno"> 352</span>  {</div><div class="line"><a name="l00353"></a><span class="lineno"> 353</span>  <span class="keywordflow">return</span> w1;</div><div class="line"><a name="l00354"></a><span class="lineno"> 354</span>  }</div><div class="line"><a name="l00355"></a><span class="lineno"> 355</span>  <span class="keywordflow">if</span>(w1 > 0xDBFF)</div><div class="line"><a name="l00356"></a><span class="lineno"> 356</span>  <span class="keywordflow">return</span> <a class="code" href="namespaceboost_1_1nowide_1_1utf.html#aaaf1f34f7f0c7d3c98f6896e737873ae">illegal</a>;</div><div class="line"><a name="l00357"></a><span class="lineno"> 357</span>  <span class="keywordflow">if</span>(current == last)</div><div class="line"><a name="l00358"></a><span class="lineno"> 358</span>  <span class="keywordflow">return</span> <a class="code" href="namespaceboost_1_1nowide_1_1utf.html#a80a0fd866c8fa2791c400dc501a4e25f">incomplete</a>;</div><div class="line"><a name="l00359"></a><span class="lineno"> 359</span>  uint16_t w2 = *current++;</div><div class="line"><a name="l00360"></a><span class="lineno"> 360</span>  <span class="keywordflow">if</span>(w2 < 0xDC00 || 0xDFFF < w2)</div><div class="line"><a name="l00361"></a><span class="lineno"> 361</span>  <span class="keywordflow">return</span> <a class="code" href="namespaceboost_1_1nowide_1_1utf.html#aaaf1f34f7f0c7d3c98f6896e737873ae">illegal</a>;</div><div class="line"><a name="l00362"></a><span class="lineno"> 362</span>  <span class="keywordflow">return</span> combine_surrogate(w1, w2);</div><div class="line"><a name="l00363"></a><span class="lineno"> 363</span>  }</div><div class="line"><a name="l00364"></a><span class="lineno"> 364</span>  <span class="keyword">template</span><<span class="keyword">typename</span> It></div><div class="line"><a name="l00365"></a><span class="lineno"> 365</span>  <span class="keyword">static</span> <a class="code" href="namespaceboost_1_1nowide_1_1utf.html#a4bd651000593bf73be05d50278e2c1e3">code_point</a> <a class="code" href="structboost_1_1nowide_1_1utf_1_1utf__traits.html#a64a7b1b32712dde6459d19ee888d3c7b">decode_valid</a>(It& current)</div><div class="line"><a name="l00366"></a><span class="lineno"> 366</span>  {</div><div class="line"><a name="l00367"></a><span class="lineno"> 367</span>  uint16_t w1 = *current++;</div><div class="line"><a name="l00368"></a><span class="lineno"> 368</span>  <span class="keywordflow">if</span>(BOOST_LIKELY(w1 < 0xD800 || 0xDFFF < w1))</div><div class="line"><a name="l00369"></a><span class="lineno"> 369</span>  {</div><div class="line"><a name="l00370"></a><span class="lineno"> 370</span>  <span class="keywordflow">return</span> w1;</div><div class="line"><a name="l00371"></a><span class="lineno"> 371</span>  }</div><div class="line"><a name="l00372"></a><span class="lineno"> 372</span>  uint16_t w2 = *current++;</div><div class="line"><a name="l00373"></a><span class="lineno"> 373</span>  <span class="keywordflow">return</span> combine_surrogate(w1, w2);</div><div class="line"><a name="l00374"></a><span class="lineno"> 374</span>  }</div><div class="line"><a name="l00375"></a><span class="lineno"> 375</span> </div><div class="line"><a name="l00376"></a><span class="lineno"> 376</span>  <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="structboost_1_1nowide_1_1utf_1_1utf__traits.html#a7303fdc81c42e30c779aa1805c40da19">max_width</a> = 2;</div><div class="line"><a name="l00377"></a><span class="lineno"> 377</span>  <span class="keyword">static</span> <span class="keywordtype">int</span> <a class="code" href="structboost_1_1nowide_1_1utf_1_1utf__traits.html#ad16265222c92f2efdacabf0efc32117d">width</a>(<a class="code" href="namespaceboost_1_1nowide_1_1utf.html#a4bd651000593bf73be05d50278e2c1e3">code_point</a> u)</div><div class="line"><a name="l00378"></a><span class="lineno"> 378</span>  {</div><div class="line"><a name="l00379"></a><span class="lineno"> 379</span>  <span class="keywordflow">return</span> u >= 0x10000 ? 2 : 1;</div><div class="line"><a name="l00380"></a><span class="lineno"> 380</span>  }</div><div class="line"><a name="l00381"></a><span class="lineno"> 381</span>  <span class="keyword">template</span><<span class="keyword">typename</span> It></div><div class="line"><a name="l00382"></a><span class="lineno"> 382</span>  <span class="keyword">static</span> It <a class="code" href="structboost_1_1nowide_1_1utf_1_1utf__traits.html#a72a312248fc248101ea00af58eb7e835">encode</a>(<a class="code" href="namespaceboost_1_1nowide_1_1utf.html#a4bd651000593bf73be05d50278e2c1e3">code_point</a> u, It out)</div><div class="line"><a name="l00383"></a><span class="lineno"> 383</span>  {</div><div class="line"><a name="l00384"></a><span class="lineno"> 384</span>  <span class="keywordflow">if</span>(BOOST_LIKELY(u <= 0xFFFF))</div><div class="line"><a name="l00385"></a><span class="lineno"> 385</span>  {</div><div class="line"><a name="l00386"></a><span class="lineno"> 386</span>  *out++ = static_cast<char_type>(u);</div><div class="line"><a name="l00387"></a><span class="lineno"> 387</span>  } <span class="keywordflow">else</span></div><div class="line"><a name="l00388"></a><span class="lineno"> 388</span>  {</div><div class="line"><a name="l00389"></a><span class="lineno"> 389</span>  u -= 0x10000;</div><div class="line"><a name="l00390"></a><span class="lineno"> 390</span>  *out++ = static_cast<char_type>(0xD800 | (u >> 10));</div><div class="line"><a name="l00391"></a><span class="lineno"> 391</span>  *out++ = static_cast<char_type>(0xDC00 | (u & 0x3FF));</div><div class="line"><a name="l00392"></a><span class="lineno"> 392</span>  }</div><div class="line"><a name="l00393"></a><span class="lineno"> 393</span>  <span class="keywordflow">return</span> out;</div><div class="line"><a name="l00394"></a><span class="lineno"> 394</span>  }</div><div class="line"><a name="l00395"></a><span class="lineno"> 395</span>  }; <span class="comment">// utf16;</span></div><div class="line"><a name="l00396"></a><span class="lineno"> 396</span> </div><div class="line"><a name="l00397"></a><span class="lineno"> 397</span>  <span class="keyword">template</span><<span class="keyword">typename</span> CharType></div><div class="line"><a name="l00398"></a><span class="lineno"> 398</span>  <span class="keyword">struct </span>utf_traits<CharType, 4></div><div class="line"><a name="l00399"></a><span class="lineno"> 399</span>  {</div><div class="line"><a name="l00400"></a><span class="lineno"> 400</span>  <span class="keyword">using</span> <a class="code" href="structboost_1_1nowide_1_1utf_1_1utf__traits.html#a863c63ad123870327ccdaf7ac4b772b0">char_type</a> = CharType;</div><div class="line"><a name="l00401"></a><span class="lineno"> 401</span>  <span class="keyword">static</span> <span class="keywordtype">int</span> <a class="code" href="structboost_1_1nowide_1_1utf_1_1utf__traits.html#a65e054f4d5b47d82fa1f6716a8ab3060">trail_length</a>(<a class="code" href="structboost_1_1nowide_1_1utf_1_1utf__traits.html#a863c63ad123870327ccdaf7ac4b772b0">char_type</a> c)</div><div class="line"><a name="l00402"></a><span class="lineno"> 402</span>  {</div><div class="line"><a name="l00403"></a><span class="lineno"> 403</span>  <span class="keywordflow">if</span>(<a class="code" href="namespaceboost_1_1nowide_1_1utf.html#a36d7b6788f08461409fbfbba8af8b0a4">is_valid_codepoint</a>(c))</div><div class="line"><a name="l00404"></a><span class="lineno"> 404</span>  <span class="keywordflow">return</span> 0;</div><div class="line"><a name="l00405"></a><span class="lineno"> 405</span>  <span class="keywordflow">return</span> -1;</div><div class="line"><a name="l00406"></a><span class="lineno"> 406</span>  }</div><div class="line"><a name="l00407"></a><span class="lineno"> 407</span>  <span class="keyword">static</span> <span class="keywordtype">bool</span> <a class="code" href="structboost_1_1nowide_1_1utf_1_1utf__traits.html#a40da5af3bb0fd5e02180f2414ef46a66">is_trail</a>(<a class="code" href="structboost_1_1nowide_1_1utf_1_1utf__traits.html#a863c63ad123870327ccdaf7ac4b772b0">char_type</a> <span class="comment">/*c*/</span>)</div><div class="line"><a name="l00408"></a><span class="lineno"> 408</span>  {</div><div class="line"><a name="l00409"></a><span class="lineno"> 409</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l00410"></a><span class="lineno"> 410</span>  }</div><div class="line"><a name="l00411"></a><span class="lineno"> 411</span>  <span class="keyword">static</span> <span class="keywordtype">bool</span> <a class="code" href="structboost_1_1nowide_1_1utf_1_1utf__traits.html#a9a8a8d715a787da7a310b5ea714da7a8">is_lead</a>(<a class="code" href="structboost_1_1nowide_1_1utf_1_1utf__traits.html#a863c63ad123870327ccdaf7ac4b772b0">char_type</a> <span class="comment">/*c*/</span>)</div><div class="line"><a name="l00412"></a><span class="lineno"> 412</span>  {</div><div class="line"><a name="l00413"></a><span class="lineno"> 413</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l00414"></a><span class="lineno"> 414</span>  }</div><div class="line"><a name="l00415"></a><span class="lineno"> 415</span> </div><div class="line"><a name="l00416"></a><span class="lineno"> 416</span>  <span class="keyword">template</span><<span class="keyword">typename</span> It></div><div class="line"><a name="l00417"></a><span class="lineno"> 417</span>  <span class="keyword">static</span> <a class="code" href="namespaceboost_1_1nowide_1_1utf.html#a4bd651000593bf73be05d50278e2c1e3">code_point</a> <a class="code" href="structboost_1_1nowide_1_1utf_1_1utf__traits.html#a64a7b1b32712dde6459d19ee888d3c7b">decode_valid</a>(It& current)</div><div class="line"><a name="l00418"></a><span class="lineno"> 418</span>  {</div><div class="line"><a name="l00419"></a><span class="lineno"> 419</span>  <span class="keywordflow">return</span> *current++;</div><div class="line"><a name="l00420"></a><span class="lineno"> 420</span>  }</div><div class="line"><a name="l00421"></a><span class="lineno"> 421</span> </div><div class="line"><a name="l00422"></a><span class="lineno"> 422</span>  <span class="keyword">template</span><<span class="keyword">typename</span> It></div><div class="line"><a name="l00423"></a><span class="lineno"> 423</span>  <span class="keyword">static</span> <a class="code" href="namespaceboost_1_1nowide_1_1utf.html#a4bd651000593bf73be05d50278e2c1e3">code_point</a> <a class="code" href="structboost_1_1nowide_1_1utf_1_1utf__traits.html#a0fbc086e7c1640206ee55c4a467c1ea3">decode</a>(It& current, It last)</div><div class="line"><a name="l00424"></a><span class="lineno"> 424</span>  {</div><div class="line"><a name="l00425"></a><span class="lineno"> 425</span>  <span class="keywordflow">if</span>(BOOST_UNLIKELY(current == last))</div><div class="line"><a name="l00426"></a><span class="lineno"> 426</span>  <span class="keywordflow">return</span> <a class="code" href="namespaceboost_1_1nowide_1_1utf.html#a80a0fd866c8fa2791c400dc501a4e25f">incomplete</a>;</div><div class="line"><a name="l00427"></a><span class="lineno"> 427</span>  <a class="code" href="namespaceboost_1_1nowide_1_1utf.html#a4bd651000593bf73be05d50278e2c1e3">code_point</a> c = *current++;</div><div class="line"><a name="l00428"></a><span class="lineno"> 428</span>  <span class="keywordflow">if</span>(BOOST_UNLIKELY(!<a class="code" href="namespaceboost_1_1nowide_1_1utf.html#a36d7b6788f08461409fbfbba8af8b0a4">is_valid_codepoint</a>(c)))</div><div class="line"><a name="l00429"></a><span class="lineno"> 429</span>  <span class="keywordflow">return</span> <a class="code" href="namespaceboost_1_1nowide_1_1utf.html#aaaf1f34f7f0c7d3c98f6896e737873ae">illegal</a>;</div><div class="line"><a name="l00430"></a><span class="lineno"> 430</span>  <span class="keywordflow">return</span> c;</div><div class="line"><a name="l00431"></a><span class="lineno"> 431</span>  }</div><div class="line"><a name="l00432"></a><span class="lineno"> 432</span>  <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="structboost_1_1nowide_1_1utf_1_1utf__traits.html#a7303fdc81c42e30c779aa1805c40da19">max_width</a> = 1;</div><div class="line"><a name="l00433"></a><span class="lineno"> 433</span>  <span class="keyword">static</span> <span class="keywordtype">int</span> <a class="code" href="structboost_1_1nowide_1_1utf_1_1utf__traits.html#ad16265222c92f2efdacabf0efc32117d">width</a>(<a class="code" href="namespaceboost_1_1nowide_1_1utf.html#a4bd651000593bf73be05d50278e2c1e3">code_point</a> <span class="comment">/*u*/</span>)</div><div class="line"><a name="l00434"></a><span class="lineno"> 434</span>  {</div><div class="line"><a name="l00435"></a><span class="lineno"> 435</span>  <span class="keywordflow">return</span> 1;</div><div class="line"><a name="l00436"></a><span class="lineno"> 436</span>  }</div><div class="line"><a name="l00437"></a><span class="lineno"> 437</span>  <span class="keyword">template</span><<span class="keyword">typename</span> It></div><div class="line"><a name="l00438"></a><span class="lineno"> 438</span>  <span class="keyword">static</span> It <a class="code" href="structboost_1_1nowide_1_1utf_1_1utf__traits.html#a72a312248fc248101ea00af58eb7e835">encode</a>(<a class="code" href="namespaceboost_1_1nowide_1_1utf.html#a4bd651000593bf73be05d50278e2c1e3">code_point</a> u, It out)</div><div class="line"><a name="l00439"></a><span class="lineno"> 439</span>  {</div><div class="line"><a name="l00440"></a><span class="lineno"> 440</span>  *out++ = static_cast<char_type>(u);</div><div class="line"><a name="l00441"></a><span class="lineno"> 441</span>  <span class="keywordflow">return</span> out;</div><div class="line"><a name="l00442"></a><span class="lineno"> 442</span>  }</div><div class="line"><a name="l00443"></a><span class="lineno"> 443</span> </div><div class="line"><a name="l00444"></a><span class="lineno"> 444</span>  }; <span class="comment">// utf32</span></div><div class="line"><a name="l00445"></a><span class="lineno"> 445</span> </div><div class="line"><a name="l00446"></a><span class="lineno"> 446</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00447"></a><span class="lineno"> 447</span> </div><div class="line"><a name="l00448"></a><span class="lineno"> 448</span>  } <span class="comment">// namespace utf</span></div><div class="line"><a name="l00449"></a><span class="lineno"> 449</span> } <span class="comment">// namespace nowide</span></div><div class="line"><a name="l00450"></a><span class="lineno"> 450</span> } <span class="comment">// namespace boost</span></div><div class="line"><a name="l00451"></a><span class="lineno"> 451</span> </div><div class="line"><a name="l00452"></a><span class="lineno"> 452</span> <span class="preprocessor">#endif</span></div><div class="ttc" id="structboost_1_1nowide_1_1utf_1_1utf__traits_html_a7303fdc81c42e30c779aa1805c40da19"><div class="ttname"><a href="structboost_1_1nowide_1_1utf_1_1utf__traits.html#a7303fdc81c42e30c779aa1805c40da19">boost::nowide::utf::utf_traits::max_width</a></div><div class="ttdeci">static const int max_width</div><div class="ttdef"><b>Definition:</b> utf.hpp:87</div></div>
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<div class="ttc" id="structboost_1_1nowide_1_1utf_1_1utf__traits_html"><div class="ttname"><a href="structboost_1_1nowide_1_1utf_1_1utf__traits.html">boost::nowide::utf::utf_traits</a></div><div class="ttdoc">UTF Traits class - functions to convert UTF sequences to and from Unicode code points.</div><div class="ttdef"><b>Definition:</b> utf.hpp:57</div></div>
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<div class="ttc" id="structboost_1_1nowide_1_1utf_1_1utf__traits_html_a40da5af3bb0fd5e02180f2414ef46a66"><div class="ttname"><a href="structboost_1_1nowide_1_1utf_1_1utf__traits.html#a40da5af3bb0fd5e02180f2414ef46a66">boost::nowide::utf::utf_traits::is_trail</a></div><div class="ttdeci">static bool is_trail(char_type c)</div></div>
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<div class="ttc" id="namespaceboost_1_1nowide_1_1utf_html"><div class="ttname"><a href="namespaceboost_1_1nowide_1_1utf.html">boost::nowide::utf</a></div><div class="ttdoc">Namespace that holds basic operations on UTF encoded sequences.</div><div class="ttdef"><b>Definition:</b> convert.hpp:20</div></div>
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<div class="ttc" id="structboost_1_1nowide_1_1utf_1_1utf__traits_html_a72a312248fc248101ea00af58eb7e835"><div class="ttname"><a href="structboost_1_1nowide_1_1utf_1_1utf__traits.html#a72a312248fc248101ea00af58eb7e835">boost::nowide::utf::utf_traits::encode</a></div><div class="ttdeci">static Iterator encode(code_point value, Iterator out)</div></div>
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<div class="ttc" id="config_8hpp_html"><div class="ttname"><a href="config_8hpp.html">config.hpp</a></div></div>
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<div class="ttc" id="structboost_1_1nowide_1_1utf_1_1utf__traits_html_a9a8a8d715a787da7a310b5ea714da7a8"><div class="ttname"><a href="structboost_1_1nowide_1_1utf_1_1utf__traits.html#a9a8a8d715a787da7a310b5ea714da7a8">boost::nowide::utf::utf_traits::is_lead</a></div><div class="ttdeci">static bool is_lead(char_type c)</div></div>
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<div class="ttc" id="namespaceboost_1_1nowide_1_1utf_html_aaaf1f34f7f0c7d3c98f6896e737873ae"><div class="ttname"><a href="namespaceboost_1_1nowide_1_1utf.html#aaaf1f34f7f0c7d3c98f6896e737873ae">boost::nowide::utf::illegal</a></div><div class="ttdeci">static const code_point illegal</div><div class="ttdoc">Special constant that defines illegal code point.</div><div class="ttdef"><b>Definition:</b> utf.hpp:33</div></div>
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<div class="ttc" id="namespaceboost_1_1nowide_1_1utf_html_a4bd651000593bf73be05d50278e2c1e3"><div class="ttname"><a href="namespaceboost_1_1nowide_1_1utf.html#a4bd651000593bf73be05d50278e2c1e3">boost::nowide::utf::code_point</a></div><div class="ttdeci">uint32_t code_point</div><div class="ttdoc">The integral type that can hold a Unicode code point.</div><div class="ttdef"><b>Definition:</b> utf.hpp:28</div></div>
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<div class="ttc" id="structboost_1_1nowide_1_1utf_1_1utf__traits_html_a863c63ad123870327ccdaf7ac4b772b0"><div class="ttname"><a href="structboost_1_1nowide_1_1utf_1_1utf__traits.html#a863c63ad123870327ccdaf7ac4b772b0">boost::nowide::utf::utf_traits::char_type</a></div><div class="ttdeci">CharType char_type</div><div class="ttdef"><b>Definition:</b> utf.hpp:62</div></div>
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<div class="ttc" id="structboost_1_1nowide_1_1utf_1_1utf__traits_html_a64a7b1b32712dde6459d19ee888d3c7b"><div class="ttname"><a href="structboost_1_1nowide_1_1utf_1_1utf__traits.html#a64a7b1b32712dde6459d19ee888d3c7b">boost::nowide::utf::utf_traits::decode_valid</a></div><div class="ttdeci">static code_point decode_valid(Iterator &p)</div></div>
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<div class="ttc" id="structboost_1_1nowide_1_1utf_1_1utf__traits_html_a65e054f4d5b47d82fa1f6716a8ab3060"><div class="ttname"><a href="structboost_1_1nowide_1_1utf_1_1utf__traits.html#a65e054f4d5b47d82fa1f6716a8ab3060">boost::nowide::utf::utf_traits::trail_length</a></div><div class="ttdeci">static int trail_length(char_type c)</div></div>
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<div class="ttc" id="namespaceboost_1_1nowide_1_1utf_html_a80a0fd866c8fa2791c400dc501a4e25f"><div class="ttname"><a href="namespaceboost_1_1nowide_1_1utf.html#a80a0fd866c8fa2791c400dc501a4e25f">boost::nowide::utf::incomplete</a></div><div class="ttdeci">static const code_point incomplete</div><div class="ttdoc">Special constant that defines incomplete code point.</div><div class="ttdef"><b>Definition:</b> utf.hpp:38</div></div>
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<div class="ttc" id="structboost_1_1nowide_1_1utf_1_1utf__traits_html_ad16265222c92f2efdacabf0efc32117d"><div class="ttname"><a href="structboost_1_1nowide_1_1utf_1_1utf__traits.html#ad16265222c92f2efdacabf0efc32117d">boost::nowide::utf::utf_traits::width</a></div><div class="ttdeci">static int width(code_point value)</div></div>
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<div class="ttc" id="namespaceboost_1_1nowide_1_1utf_html_a36d7b6788f08461409fbfbba8af8b0a4"><div class="ttname"><a href="namespaceboost_1_1nowide_1_1utf.html#a36d7b6788f08461409fbfbba8af8b0a4">boost::nowide::utf::is_valid_codepoint</a></div><div class="ttdeci">bool is_valid_codepoint(code_point v)</div><div class="ttdoc">the function checks if v is a valid code point</div><div class="ttdef"><b>Definition:</b> utf.hpp:43</div></div>
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<div class="ttc" id="structboost_1_1nowide_1_1utf_1_1utf__traits_html_a0fbc086e7c1640206ee55c4a467c1ea3"><div class="ttname"><a href="structboost_1_1nowide_1_1utf_1_1utf__traits.html#a0fbc086e7c1640206ee55c4a467c1ea3">boost::nowide::utf::utf_traits::decode</a></div><div class="ttdeci">static code_point decode(Iterator &p, Iterator e)</div></div>
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