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<div id="projectbrief">Additional custom or not Standard C++ covered algorithms</div>
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<li class="navelem"><a class="el" href="dir_d44c64559bbebec7f509842c48db8b23.html">include</a></li><li class="navelem"><a class="el" href="dir_fca3c47b2ea228727bd6729832f89576.html">stdex</a></li> </ul>
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<div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno"> 1</span><span class="comment">/*</span></div>
<div class="line"><a id="l00002" name="l00002"></a><span class="lineno"> 2</span><span class="comment"> SPDX-License-Identifier: MIT</span></div>
<div class="line"><a id="l00003" name="l00003"></a><span class="lineno"> 3</span><span class="comment"> Copyright © 2023 Amebis</span></div>
<div class="line"><a id="l00004" name="l00004"></a><span class="lineno"> 4</span><span class="comment">*/</span></div>
<div class="line"><a id="l00005" name="l00005"></a><span class="lineno"> 5</span> </div>
<div class="line"><a id="l00006" name="l00006"></a><span class="lineno"> 6</span><span class="preprocessor">#pragma once</span></div>
<div class="line"><a id="l00007" name="l00007"></a><span class="lineno"> 7</span> </div>
<div class="line"><a id="l00008" name="l00008"></a><span class="lineno"> 8</span><span class="preprocessor">#include &quot;sal.hpp&quot;</span></div>
<div class="line"><a id="l00009" name="l00009"></a><span class="lineno"> 9</span><span class="preprocessor">#include &lt;assert.h&gt;</span></div>
<div class="line"><a id="l00010" name="l00010"></a><span class="lineno"> 10</span><span class="preprocessor">#ifdef _WIN32</span></div>
<div class="line"><a id="l00011" name="l00011"></a><span class="lineno"> 11</span><span class="preprocessor">#include &lt;windows.h&gt;</span></div>
<div class="line"><a id="l00012" name="l00012"></a><span class="lineno"> 12</span><span class="preprocessor">#endif</span></div>
<div class="line"><a id="l00013" name="l00013"></a><span class="lineno"> 13</span><span class="preprocessor">#include &lt;memory&gt;</span></div>
<div class="line"><a id="l00014" name="l00014"></a><span class="lineno"> 14</span><span class="preprocessor">#include &lt;string&gt;</span></div>
<div class="line"><a id="l00015" name="l00015"></a><span class="lineno"> 15</span> </div>
<div class="line"><a id="l00016" name="l00016"></a><span class="lineno"> 16</span><span class="keyword">namespace </span>stdex</div>
<div class="line"><a id="l00017" name="l00017"></a><span class="lineno"> 17</span>{</div>
<div class="line"><a id="l00018" name="l00018"></a><span class="lineno"> 18</span> <span class="keyword">enum class</span> charset_id {</div>
<div class="line"><a id="l00019" name="l00019"></a><span class="lineno"> 19</span> <span class="keywordflow">default</span> = 0,</div>
<div class="line"><a id="l00020" name="l00020"></a><span class="lineno"> 20</span> };</div>
<div class="line"><a id="l00021" name="l00021"></a><span class="lineno"> 21</span> </div>
<div class="line"><a id="l00032" name="l00032"></a><span class="lineno"> 32</span> <span class="keyword">inline</span> <span class="keywordtype">void</span> str2wstr(</div>
<div class="line"><a id="l00033" name="l00033"></a><span class="lineno"> 33</span> _Inout_ std::wstring&amp; dst,</div>
<div class="line"><a id="l00034" name="l00034"></a><span class="lineno"> 34</span> _In_reads_or_z_opt_(count_src) <span class="keyword">const</span> <span class="keywordtype">char</span>* src, _In_ <span class="keywordtype">size_t</span> count_src,</div>
<div class="line"><a id="l00035" name="l00035"></a><span class="lineno"> 35</span> _In_ charset_id charset = charset_id::default)</div>
<div class="line"><a id="l00036" name="l00036"></a><span class="lineno"> 36</span> {</div>
<div class="line"><a id="l00037" name="l00037"></a><span class="lineno"> 37</span> assert(src || !count_src);</div>
<div class="line"><a id="l00038" name="l00038"></a><span class="lineno"> 38</span><span class="preprocessor">#ifdef _WIN32</span></div>
<div class="line"><a id="l00039" name="l00039"></a><span class="lineno"> 39</span> assert(count_src &lt; INT_MAX || count_src == SIZE_MAX);</div>
<div class="line"><a id="l00040" name="l00040"></a><span class="lineno"> 40</span> <span class="keyword">constexpr</span> DWORD dwFlags = MB_PRECOMPOSED;</div>
<div class="line"><a id="l00041" name="l00041"></a><span class="lineno"> 41</span> </div>
<div class="line"><a id="l00042" name="l00042"></a><span class="lineno"> 42</span> <span class="comment">// Try to convert to stack buffer first.</span></div>
<div class="line"><a id="l00043" name="l00043"></a><span class="lineno"> 43</span> WCHAR szStackBuffer[1024/<span class="keyword">sizeof</span>(WCHAR)];</div>
<div class="line"><a id="l00044" name="l00044"></a><span class="lineno"> 44</span> <span class="keywordtype">int</span> cch = MultiByteToWideChar(<span class="keyword">static_cast&lt;</span>UINT<span class="keyword">&gt;</span>(charset), dwFlags, src, <span class="keyword">static_cast&lt;</span><span class="keywordtype">int</span><span class="keyword">&gt;</span>(count_src), szStackBuffer, _countof(szStackBuffer));</div>
<div class="line"><a id="l00045" name="l00045"></a><span class="lineno"> 45</span> <span class="keywordflow">if</span> (cch) {</div>
<div class="line"><a id="l00046" name="l00046"></a><span class="lineno"> 46</span> <span class="comment">// Append from stack.</span></div>
<div class="line"><a id="l00047" name="l00047"></a><span class="lineno"> 47</span> dst.append(szStackBuffer, count_src != SIZE_MAX ? wcsnlen(szStackBuffer, cch) : (size_t)cch - 1);</div>
<div class="line"><a id="l00048" name="l00048"></a><span class="lineno"> 48</span> } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (::GetLastError() == ERROR_INSUFFICIENT_BUFFER) {</div>
<div class="line"><a id="l00049" name="l00049"></a><span class="lineno"> 49</span> <span class="comment">// Query the required output size. Allocate buffer. Then convert again.</span></div>
<div class="line"><a id="l00050" name="l00050"></a><span class="lineno"> 50</span> cch = MultiByteToWideChar(<span class="keyword">static_cast&lt;</span>UINT<span class="keyword">&gt;</span>(charset), dwFlags, src, <span class="keyword">static_cast&lt;</span><span class="keywordtype">int</span><span class="keyword">&gt;</span>(count_src), NULL, 0);</div>
<div class="line"><a id="l00051" name="l00051"></a><span class="lineno"> 51</span> std::unique_ptr&lt;WCHAR[]&gt; szBuffer(<span class="keyword">new</span> WCHAR[cch]);</div>
<div class="line"><a id="l00052" name="l00052"></a><span class="lineno"> 52</span> cch = MultiByteToWideChar(<span class="keyword">static_cast&lt;</span>UINT<span class="keyword">&gt;</span>(charset), dwFlags, src, <span class="keyword">static_cast&lt;</span><span class="keywordtype">int</span><span class="keyword">&gt;</span>(count_src), szBuffer.get(), cch);</div>
<div class="line"><a id="l00053" name="l00053"></a><span class="lineno"> 53</span> dst.append(szBuffer.get(), count_src != SIZE_MAX ? wcsnlen(szBuffer.get(), cch) : (size_t)cch - 1);</div>
<div class="line"><a id="l00054" name="l00054"></a><span class="lineno"> 54</span> }</div>
<div class="line"><a id="l00055" name="l00055"></a><span class="lineno"> 55</span><span class="preprocessor">#else</span></div>
<div class="line"><a id="l00056" name="l00056"></a><span class="lineno"> 56</span> <span class="keywordflow">throw</span> std::exception(<span class="stringliteral">&quot;not implemented&quot;</span>);</div>
<div class="line"><a id="l00057" name="l00057"></a><span class="lineno"> 57</span><span class="preprocessor">#endif</span></div>
<div class="line"><a id="l00058" name="l00058"></a><span class="lineno"> 58</span> }</div>
<div class="line"><a id="l00059" name="l00059"></a><span class="lineno"> 59</span> </div>
<div class="line"><a id="l00069" name="l00069"></a><span class="lineno"> 69</span> <span class="keyword">inline</span> <span class="keywordtype">void</span> str2wstr(</div>
<div class="line"><a id="l00070" name="l00070"></a><span class="lineno"> 70</span> _Inout_ std::wstring&amp; dst,</div>
<div class="line"><a id="l00071" name="l00071"></a><span class="lineno"> 71</span> _In_ <span class="keyword">const</span> std::string&amp; src,</div>
<div class="line"><a id="l00072" name="l00072"></a><span class="lineno"> 72</span> _In_ charset_id charset = charset_id::default)</div>
<div class="line"><a id="l00073" name="l00073"></a><span class="lineno"> 73</span> {</div>
<div class="line"><a id="l00074" name="l00074"></a><span class="lineno"> 74</span> str2wstr(dst, src.data(), src.size(), charset);</div>
<div class="line"><a id="l00075" name="l00075"></a><span class="lineno"> 75</span> }</div>
<div class="line"><a id="l00076" name="l00076"></a><span class="lineno"> 76</span> </div>
<div class="line"><a id="l00086" name="l00086"></a><span class="lineno"> 86</span> <span class="keyword">inline</span> std::wstring str2wstr(</div>
<div class="line"><a id="l00087" name="l00087"></a><span class="lineno"> 87</span> _In_reads_or_z_opt_(count_src) <span class="keyword">const</span> <span class="keywordtype">char</span>* src, _In_ <span class="keywordtype">size_t</span> count_src,</div>
<div class="line"><a id="l00088" name="l00088"></a><span class="lineno"> 88</span> _In_ charset_id charset = charset_id::default)</div>
<div class="line"><a id="l00089" name="l00089"></a><span class="lineno"> 89</span> {</div>
<div class="line"><a id="l00090" name="l00090"></a><span class="lineno"> 90</span> std::wstring dst;</div>
<div class="line"><a id="l00091" name="l00091"></a><span class="lineno"> 91</span> str2wstr(dst, src, count_src, charset);</div>
<div class="line"><a id="l00092" name="l00092"></a><span class="lineno"> 92</span> <span class="keywordflow">return</span> dst;</div>
<div class="line"><a id="l00093" name="l00093"></a><span class="lineno"> 93</span> }</div>
<div class="line"><a id="l00094" name="l00094"></a><span class="lineno"> 94</span> </div>
<div class="line"><a id="l00103" name="l00103"></a><span class="lineno"> 103</span> <span class="keyword">inline</span> std::wstring str2wstr(</div>
<div class="line"><a id="l00104" name="l00104"></a><span class="lineno"> 104</span> _In_ <span class="keyword">const</span> std::string&amp; src,</div>
<div class="line"><a id="l00105" name="l00105"></a><span class="lineno"> 105</span> _In_ charset_id charset = charset_id::default)</div>
<div class="line"><a id="l00106" name="l00106"></a><span class="lineno"> 106</span> {</div>
<div class="line"><a id="l00107" name="l00107"></a><span class="lineno"> 107</span> <span class="keywordflow">return</span> str2wstr(src.c_str(), src.size(), charset);</div>
<div class="line"><a id="l00108" name="l00108"></a><span class="lineno"> 108</span> }</div>
<div class="line"><a id="l00109" name="l00109"></a><span class="lineno"> 109</span> </div>
<div class="line"><a id="l00118" name="l00118"></a><span class="lineno"> 118</span> <span class="keyword">inline</span> <span class="keywordtype">void</span> wstr2str(</div>
<div class="line"><a id="l00119" name="l00119"></a><span class="lineno"> 119</span> _Inout_ std::string&amp; dst,</div>
<div class="line"><a id="l00120" name="l00120"></a><span class="lineno"> 120</span> _In_reads_or_z_opt_(count_src) <span class="keyword">const</span> <span class="keywordtype">wchar_t</span>* src,</div>
<div class="line"><a id="l00121" name="l00121"></a><span class="lineno"> 121</span> _In_ <span class="keywordtype">size_t</span> count_src,</div>
<div class="line"><a id="l00122" name="l00122"></a><span class="lineno"> 122</span> _In_ charset_id charset = charset_id::default)</div>
<div class="line"><a id="l00123" name="l00123"></a><span class="lineno"> 123</span> {</div>
<div class="line"><a id="l00124" name="l00124"></a><span class="lineno"> 124</span> assert(src || !count_src);</div>
<div class="line"><a id="l00125" name="l00125"></a><span class="lineno"> 125</span><span class="preprocessor">#ifdef _WIN32</span></div>
<div class="line"><a id="l00126" name="l00126"></a><span class="lineno"> 126</span> assert(count_src &lt; INT_MAX || count_src == SIZE_MAX);</div>
<div class="line"><a id="l00127" name="l00127"></a><span class="lineno"> 127</span> <span class="keyword">constexpr</span> DWORD dwFlags = 0;</div>
<div class="line"><a id="l00128" name="l00128"></a><span class="lineno"> 128</span> <span class="keyword">constexpr</span> LPCCH lpDefaultChar = NULL;</div>
<div class="line"><a id="l00129" name="l00129"></a><span class="lineno"> 129</span> </div>
<div class="line"><a id="l00130" name="l00130"></a><span class="lineno"> 130</span> <span class="comment">// Try to convert to stack buffer first.</span></div>
<div class="line"><a id="l00131" name="l00131"></a><span class="lineno"> 131</span> CHAR szStackBuffer[1024/<span class="keyword">sizeof</span>(CHAR)];</div>
<div class="line"><a id="l00132" name="l00132"></a><span class="lineno"> 132</span> <span class="keywordtype">int</span> cch = WideCharToMultiByte(<span class="keyword">static_cast&lt;</span>UINT<span class="keyword">&gt;</span>(charset), dwFlags, src, <span class="keyword">static_cast&lt;</span><span class="keywordtype">int</span><span class="keyword">&gt;</span>(count_src), szStackBuffer, _countof(szStackBuffer), lpDefaultChar, NULL);</div>
<div class="line"><a id="l00133" name="l00133"></a><span class="lineno"> 133</span> <span class="keywordflow">if</span> (cch) {</div>
<div class="line"><a id="l00134" name="l00134"></a><span class="lineno"> 134</span> <span class="comment">// Copy from stack. Be careful not to include zero terminator.</span></div>
<div class="line"><a id="l00135" name="l00135"></a><span class="lineno"> 135</span> dst.append(szStackBuffer, count_src != SIZE_MAX ? strnlen(szStackBuffer, cch) : (size_t)cch - 1);</div>
<div class="line"><a id="l00136" name="l00136"></a><span class="lineno"> 136</span> } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (::GetLastError() == ERROR_INSUFFICIENT_BUFFER) {</div>
<div class="line"><a id="l00137" name="l00137"></a><span class="lineno"> 137</span> <span class="comment">// Query the required output size. Allocate buffer. Then convert again.</span></div>
<div class="line"><a id="l00138" name="l00138"></a><span class="lineno"> 138</span> cch = WideCharToMultiByte(<span class="keyword">static_cast&lt;</span>UINT<span class="keyword">&gt;</span>(charset), dwFlags, src, <span class="keyword">static_cast&lt;</span><span class="keywordtype">int</span><span class="keyword">&gt;</span>(count_src), NULL, 0, lpDefaultChar, NULL);</div>
<div class="line"><a id="l00139" name="l00139"></a><span class="lineno"> 139</span> std::unique_ptr&lt;CHAR[]&gt; szBuffer(<span class="keyword">new</span> CHAR[cch]);</div>
<div class="line"><a id="l00140" name="l00140"></a><span class="lineno"> 140</span> cch = WideCharToMultiByte(<span class="keyword">static_cast&lt;</span>UINT<span class="keyword">&gt;</span>(charset), dwFlags, src, <span class="keyword">static_cast&lt;</span><span class="keywordtype">int</span><span class="keyword">&gt;</span>(count_src), szBuffer.get(), cch, lpDefaultChar, NULL);</div>
<div class="line"><a id="l00141" name="l00141"></a><span class="lineno"> 141</span> dst.append(szBuffer.get(), count_src != SIZE_MAX ? strnlen(szBuffer.get(), cch) : (size_t)cch - 1);</div>
<div class="line"><a id="l00142" name="l00142"></a><span class="lineno"> 142</span> }</div>
<div class="line"><a id="l00143" name="l00143"></a><span class="lineno"> 143</span><span class="preprocessor">#else</span></div>
<div class="line"><a id="l00144" name="l00144"></a><span class="lineno"> 144</span> <span class="keywordflow">throw</span> std::exception(<span class="stringliteral">&quot;not implemented&quot;</span>);</div>
<div class="line"><a id="l00145" name="l00145"></a><span class="lineno"> 145</span><span class="preprocessor">#endif</span></div>
<div class="line"><a id="l00146" name="l00146"></a><span class="lineno"> 146</span> }</div>
<div class="line"><a id="l00147" name="l00147"></a><span class="lineno"> 147</span> </div>
<div class="line"><a id="l00155" name="l00155"></a><span class="lineno"> 155</span> <span class="keyword">inline</span> <span class="keywordtype">void</span> wstr2str(</div>
<div class="line"><a id="l00156" name="l00156"></a><span class="lineno"> 156</span> _Inout_ std::string&amp; dst,</div>
<div class="line"><a id="l00157" name="l00157"></a><span class="lineno"> 157</span> _In_ <span class="keyword">const</span> std::wstring&amp; src,</div>
<div class="line"><a id="l00158" name="l00158"></a><span class="lineno"> 158</span> _In_ charset_id charset = charset_id::default)</div>
<div class="line"><a id="l00159" name="l00159"></a><span class="lineno"> 159</span> {</div>
<div class="line"><a id="l00160" name="l00160"></a><span class="lineno"> 160</span> wstr2str(dst, src.c_str(), src.size(), charset);</div>
<div class="line"><a id="l00161" name="l00161"></a><span class="lineno"> 161</span> }</div>
<div class="line"><a id="l00162" name="l00162"></a><span class="lineno"> 162</span> </div>
<div class="line"><a id="l00172" name="l00172"></a><span class="lineno"> 172</span> <span class="keyword">inline</span> std::string wstr2str(</div>
<div class="line"><a id="l00173" name="l00173"></a><span class="lineno"> 173</span> _In_reads_or_z_opt_(count_src) <span class="keyword">const</span> <span class="keywordtype">wchar_t</span>* src,</div>
<div class="line"><a id="l00174" name="l00174"></a><span class="lineno"> 174</span> _In_ <span class="keywordtype">size_t</span> count_src,</div>
<div class="line"><a id="l00175" name="l00175"></a><span class="lineno"> 175</span> _In_ charset_id charset = charset_id::default)</div>
<div class="line"><a id="l00176" name="l00176"></a><span class="lineno"> 176</span> {</div>
<div class="line"><a id="l00177" name="l00177"></a><span class="lineno"> 177</span> std::string dst;</div>
<div class="line"><a id="l00178" name="l00178"></a><span class="lineno"> 178</span> wstr2str(dst, src, count_src, charset);</div>
<div class="line"><a id="l00179" name="l00179"></a><span class="lineno"> 179</span> <span class="keywordflow">return</span> dst;</div>
<div class="line"><a id="l00180" name="l00180"></a><span class="lineno"> 180</span> }</div>
<div class="line"><a id="l00181" name="l00181"></a><span class="lineno"> 181</span> </div>
<div class="line"><a id="l00190" name="l00190"></a><span class="lineno"> 190</span> <span class="keyword">inline</span> std::string wstr2str(</div>
<div class="line"><a id="l00191" name="l00191"></a><span class="lineno"> 191</span> _In_ <span class="keyword">const</span> std::wstring&amp; src,</div>
<div class="line"><a id="l00192" name="l00192"></a><span class="lineno"> 192</span> _In_ charset_id charset = charset_id::default)</div>
<div class="line"><a id="l00193" name="l00193"></a><span class="lineno"> 193</span> {</div>
<div class="line"><a id="l00194" name="l00194"></a><span class="lineno"> 194</span> <span class="keywordflow">return</span> wstr2str(src.c_str(), src.size(), charset);</div>
<div class="line"><a id="l00195" name="l00195"></a><span class="lineno"> 195</span> }</div>
<div class="line"><a id="l00196" name="l00196"></a><span class="lineno"> 196</span>}</div>
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