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<div class="title">path.h</div>  </div>
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<div class="contents">
<a href="path_8h.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;<span class="comment">// Copyright 2021 Yu Jing</span></div>
<div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160;<span class="preprocessor">#ifndef ARGCV_PATH_PATH_H_</span></div>
<div class="line"><a name="l00003"></a><span class="lineno">    3</span>&#160;<span class="preprocessor">#define ARGCV_PATH_PATH_H_</span></div>
<div class="line"><a name="l00004"></a><span class="lineno">    4</span>&#160; </div>
<div class="line"><a name="l00005"></a><span class="lineno">    5</span>&#160;<span class="preprocessor">#include &lt;initializer_list&gt;</span></div>
<div class="line"><a name="l00006"></a><span class="lineno">    6</span>&#160;<span class="preprocessor">#include &lt;string&gt;</span></div>
<div class="line"><a name="l00007"></a><span class="lineno">    7</span>&#160; </div>
<div class="line"><a name="l00008"></a><span class="lineno">    8</span>&#160;<span class="preprocessor">#include &quot;<a class="code" href="types_8h.html">argcv/base/types.h</a>&quot;</span></div>
<div class="line"><a name="l00009"></a><span class="lineno">    9</span>&#160; </div>
<div class="line"><a name="l00010"></a><span class="lineno">   10</span>&#160;<span class="comment">// #include &quot;glog/logging.h&quot;</span></div>
<div class="line"><a name="l00011"></a><span class="lineno">   11</span>&#160; </div>
<div class="line"><a name="l00012"></a><span class="lineno">   12</span>&#160;<span class="keyword">namespace </span><a class="code" href="namespaceargcv.html">argcv</a> {</div>
<div class="line"><a name="l00013"></a><span class="lineno">   13</span>&#160;<span class="keyword">namespace </span>path {</div>
<div class="line"><a name="l00014"></a><span class="lineno">   14</span>&#160; </div>
<div class="line"><a name="l00015"></a><span class="lineno">   15</span>&#160;<span class="keyword">namespace </span>internal {</div>
<div class="line"><a name="l00016"></a><span class="lineno">   16</span>&#160;<span class="keyword">class </span>PathBuff {</div>
<div class="line"><a name="l00017"></a><span class="lineno">   17</span>&#160; <span class="keyword">public</span>:</div>
<div class="line"><a name="l00018"></a><span class="lineno">   18</span>&#160;  PathBuff() noexcept : PathBuff(&quot;&quot;, 0) {}</div>
<div class="line"><a name="l00019"></a><span class="lineno">   19</span>&#160; </div>
<div class="line"><a name="l00020"></a><span class="lineno">   20</span>&#160;  <span class="keyword">explicit</span> PathBuff(<span class="keyword">const</span> <a class="code" href="namespaceargcv.html#a775cf32fa3d656254b2dbc0b62dc0ea1">string_view</a> &amp;data) noexcept</div>
<div class="line"><a name="l00021"></a><span class="lineno">   21</span>&#160;      : PathBuff(data, data.length()) {}</div>
<div class="line"><a name="l00022"></a><span class="lineno">   22</span>&#160; </div>
<div class="line"><a name="l00023"></a><span class="lineno">   23</span>&#160;  <span class="keyword">explicit</span> PathBuff(<span class="keyword">const</span> <a class="code" href="namespaceargcv.html#a775cf32fa3d656254b2dbc0b62dc0ea1">string_view</a> &amp;data, <span class="keywordtype">size_t</span> len) noexcept;</div>
<div class="line"><a name="l00024"></a><span class="lineno">   24</span>&#160; </div>
<div class="line"><a name="l00025"></a><span class="lineno">   25</span>&#160;  <span class="keyword">virtual</span> ~PathBuff() noexcept { <span class="keyword">delete</span>[] buff_; }</div>
<div class="line"><a name="l00026"></a><span class="lineno">   26</span>&#160; </div>
<div class="line"><a name="l00027"></a><span class="lineno">   27</span>&#160;  <span class="keywordtype">size_t</span> W() noexcept { <span class="keywordflow">return</span> sz_; }</div>
<div class="line"><a name="l00028"></a><span class="lineno">   28</span>&#160; </div>
<div class="line"><a name="l00029"></a><span class="lineno">   29</span>&#160;  <span class="keywordtype">size_t</span> Backspace() noexcept;</div>
<div class="line"><a name="l00030"></a><span class="lineno">   30</span>&#160; </div>
<div class="line"><a name="l00031"></a><span class="lineno">   31</span>&#160;  <span class="comment">// Warning: There is NO out_of_range check here</span></div>
<div class="line"><a name="l00032"></a><span class="lineno">   32</span>&#160;  <span class="keywordtype">char</span> Index(<span class="keywordtype">int</span> idx) noexcept { <span class="keywordflow">return</span> buff_[idx]; }</div>
<div class="line"><a name="l00033"></a><span class="lineno">   33</span>&#160; </div>
<div class="line"><a name="l00034"></a><span class="lineno">   34</span>&#160;  <span class="comment">// Warning: Didn&#39;t Checked situation when sz_ == 0</span></div>
<div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160;  <span class="keywordtype">char</span> Last() noexcept { <span class="keywordflow">return</span> buff_[sz_ - 1]; }</div>
<div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160; </div>
<div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160;  PathBuff &amp;Append(<span class="keywordtype">char</span> c) noexcept;</div>
<div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160; </div>
<div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;  <span class="keywordtype">string</span> ToString() const noexcept { <span class="keywordflow">return</span> <a class="code" href="namespaceargcv.html#ac4307817817de9614dd28c828ac9f93a">string</a>(buff_, sz_); }</div>
<div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160; </div>
<div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;  <a class="code" href="namespaceargcv.html#a775cf32fa3d656254b2dbc0b62dc0ea1">string_view</a> ToView() const noexcept { <span class="keywordflow">return</span> <a class="code" href="namespaceargcv.html#a775cf32fa3d656254b2dbc0b62dc0ea1">string_view</a>(buff_, sz_); }</div>
<div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160; </div>
<div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160; <span class="keyword">private</span>:</div>
<div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160;  <span class="keywordtype">size_t</span> sz_;</div>
<div class="line"><a name="l00045"></a><span class="lineno">   45</span>&#160;  <span class="keywordtype">size_t</span> sz_buff_;</div>
<div class="line"><a name="l00046"></a><span class="lineno">   46</span>&#160;  <span class="keywordtype">char</span> *buff_;</div>
<div class="line"><a name="l00047"></a><span class="lineno">   47</span>&#160;};</div>
<div class="line"><a name="l00048"></a><span class="lineno">   48</span>&#160; </div>
<div class="line"><a name="l00049"></a><span class="lineno">   49</span>&#160;<span class="keywordtype">string</span> JoinPathImpl(std::initializer_list&lt;const string_view&gt; paths) noexcept;</div>
<div class="line"><a name="l00050"></a><span class="lineno">   50</span>&#160;}  <span class="comment">// namespace internal</span></div>
<div class="line"><a name="l00051"></a><span class="lineno">   51</span>&#160; </div>
<div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160;<span class="comment">// Code Ref: https://golang.org/src/path/path.go</span></div>
<div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;<span class="comment">// See Also: https://9p.io/sys/doc/lexnames.html</span></div>
<div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;<span class="comment">//</span></div>
<div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;<span class="comment">// Clean returns the shortest path name equivalent to path</span></div>
<div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;<span class="comment">// by purely lexical processing. It applies the following rules</span></div>
<div class="line"><a name="l00057"></a><span class="lineno">   57</span>&#160;<span class="comment">// iteratively until no further processing can be done:</span></div>
<div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160;<span class="comment">//</span></div>
<div class="line"><a name="l00059"></a><span class="lineno">   59</span>&#160;<span class="comment">//  1. Replace multiple slashes with a single slash.</span></div>
<div class="line"><a name="l00060"></a><span class="lineno">   60</span>&#160;<span class="comment">//  2. Eliminate each . path name element (the current directory).</span></div>
<div class="line"><a name="l00061"></a><span class="lineno">   61</span>&#160;<span class="comment">//  3. Eliminate each inner .. path name element (the parent directory)</span></div>
<div class="line"><a name="l00062"></a><span class="lineno">   62</span>&#160;<span class="comment">//     along with the non-.. element that precedes it.</span></div>
<div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160;<span class="comment">//  4. Eliminate .. elements that begin a rooted path:</span></div>
<div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160;<span class="comment">//     that is, replace &quot;/..&quot; by &quot;/&quot; at the beginning of a path.</span></div>
<div class="line"><a name="l00065"></a><span class="lineno">   65</span>&#160;<span class="comment">//</span></div>
<div class="line"><a name="l00066"></a><span class="lineno">   66</span>&#160;<span class="comment">// The returned path ends in a slash only if it is the root &quot;/&quot;.</span></div>
<div class="line"><a name="l00067"></a><span class="lineno">   67</span>&#160;<span class="comment">//</span></div>
<div class="line"><a name="l00068"></a><span class="lineno">   68</span>&#160;<span class="comment">// If the result of this process is an empty string, Clean</span></div>
<div class="line"><a name="l00069"></a><span class="lineno">   69</span>&#160;<span class="comment">// returns the string &quot;.&quot;.</span></div>
<div class="line"><a name="l00070"></a><span class="lineno"><a class="line" href="namespaceargcv_1_1path.html#a4698c36133c2270117be53efe80f7b61">   70</a></span>&#160;<span class="keyword">inline</span> <span class="keywordtype">string</span> <a class="code" href="namespaceargcv_1_1path.html#a4698c36133c2270117be53efe80f7b61">CleanPath</a>(<a class="code" href="namespaceargcv.html#a775cf32fa3d656254b2dbc0b62dc0ea1">string_view</a> in) noexcept {</div>
<div class="line"><a name="l00071"></a><span class="lineno">   71</span>&#160;  <span class="keywordflow">if</span> (in == <span class="stringliteral">&quot;&quot;</span>) {</div>
<div class="line"><a name="l00072"></a><span class="lineno">   72</span>&#160;    <span class="keywordflow">return</span> <span class="stringliteral">&quot;.&quot;</span>;</div>
<div class="line"><a name="l00073"></a><span class="lineno">   73</span>&#160;  }</div>
<div class="line"><a name="l00074"></a><span class="lineno">   74</span>&#160; </div>
<div class="line"><a name="l00075"></a><span class="lineno">   75</span>&#160;  <span class="comment">// Invariants:</span></div>
<div class="line"><a name="l00076"></a><span class="lineno">   76</span>&#160;  <span class="comment">//  reading from path; r is index of next byte to process.</span></div>
<div class="line"><a name="l00077"></a><span class="lineno">   77</span>&#160;  <span class="comment">//  writing to buf; w is index of next byte to write.</span></div>
<div class="line"><a name="l00078"></a><span class="lineno">   78</span>&#160;  <span class="comment">//  dotdot is index in buf where .. must stop, either because</span></div>
<div class="line"><a name="l00079"></a><span class="lineno">   79</span>&#160;  <span class="comment">//  it is the leading slash or it is a leading ../../.. prefix.</span></div>
<div class="line"><a name="l00080"></a><span class="lineno">   80</span>&#160;  <span class="keywordtype">bool</span> rooted = in[0] == <span class="charliteral">&#39;/&#39;</span>;</div>
<div class="line"><a name="l00081"></a><span class="lineno">   81</span>&#160;  internal::PathBuff out(rooted ? <span class="stringliteral">&quot;/&quot;</span> : <span class="stringliteral">&quot;&quot;</span>);</div>
<div class="line"><a name="l00082"></a><span class="lineno">   82</span>&#160;  <span class="keywordtype">size_t</span> r = 0;</div>
<div class="line"><a name="l00083"></a><span class="lineno">   83</span>&#160;  <span class="keywordtype">size_t</span> dotdot = 0;</div>
<div class="line"><a name="l00084"></a><span class="lineno">   84</span>&#160;  <span class="keywordtype">size_t</span> n = in.length();</div>
<div class="line"><a name="l00085"></a><span class="lineno">   85</span>&#160;  <span class="keywordflow">if</span> (rooted) {</div>
<div class="line"><a name="l00086"></a><span class="lineno">   86</span>&#160;    r++;</div>
<div class="line"><a name="l00087"></a><span class="lineno">   87</span>&#160;    dotdot++;</div>
<div class="line"><a name="l00088"></a><span class="lineno">   88</span>&#160;  }</div>
<div class="line"><a name="l00089"></a><span class="lineno">   89</span>&#160;  <span class="keywordflow">while</span> (r &lt; n) {</div>
<div class="line"><a name="l00090"></a><span class="lineno">   90</span>&#160;    <span class="comment">// current character</span></div>
<div class="line"><a name="l00091"></a><span class="lineno">   91</span>&#160;    <span class="keywordtype">char</span> c = in[r];</div>
<div class="line"><a name="l00092"></a><span class="lineno">   92</span>&#160;    <span class="keywordflow">switch</span> (c) {</div>
<div class="line"><a name="l00093"></a><span class="lineno">   93</span>&#160;      <span class="keywordflow">case</span> <span class="charliteral">&#39;/&#39;</span>:</div>
<div class="line"><a name="l00094"></a><span class="lineno">   94</span>&#160;        <span class="comment">// empty path element</span></div>
<div class="line"><a name="l00095"></a><span class="lineno">   95</span>&#160;        r++;</div>
<div class="line"><a name="l00096"></a><span class="lineno">   96</span>&#160;        <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00097"></a><span class="lineno">   97</span>&#160;      <span class="keywordflow">case</span> <span class="charliteral">&#39;.&#39;</span>:</div>
<div class="line"><a name="l00098"></a><span class="lineno">   98</span>&#160;        <span class="keywordflow">if</span> (r + 1 &lt;= n) {</div>
<div class="line"><a name="l00099"></a><span class="lineno">   99</span>&#160;          <span class="keywordflow">if</span> (r + 1 == n || in[r + 1] == <span class="charliteral">&#39;/&#39;</span>) {</div>
<div class="line"><a name="l00100"></a><span class="lineno">  100</span>&#160;            <span class="comment">// . element</span></div>
<div class="line"><a name="l00101"></a><span class="lineno">  101</span>&#160;            r++;</div>
<div class="line"><a name="l00102"></a><span class="lineno">  102</span>&#160;            <span class="keywordflow">break</span>;  <span class="comment">// break switch(c)</span></div>
<div class="line"><a name="l00103"></a><span class="lineno">  103</span>&#160;          } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (r + 2 &lt;= n &amp;&amp; in[r + 1] == <span class="charliteral">&#39;.&#39;</span> &amp;&amp;</div>
<div class="line"><a name="l00104"></a><span class="lineno">  104</span>&#160;                     (r + 2 == n || in[r + 2] == <span class="charliteral">&#39;/&#39;</span>)) {</div>
<div class="line"><a name="l00105"></a><span class="lineno">  105</span>&#160;            <span class="comment">// .. element: remove to last /</span></div>
<div class="line"><a name="l00106"></a><span class="lineno">  106</span>&#160;            r += 2;</div>
<div class="line"><a name="l00107"></a><span class="lineno">  107</span>&#160;            <span class="keywordflow">if</span> (out.W() &gt; dotdot) {</div>
<div class="line"><a name="l00108"></a><span class="lineno">  108</span>&#160;              out.Backspace();</div>
<div class="line"><a name="l00109"></a><span class="lineno">  109</span>&#160;              <span class="keywordflow">while</span> (out.W() &gt; dotdot &amp;&amp; out.Index(out.W()) != <span class="charliteral">&#39;/&#39;</span>) {</div>
<div class="line"><a name="l00110"></a><span class="lineno">  110</span>&#160;                out.Backspace();</div>
<div class="line"><a name="l00111"></a><span class="lineno">  111</span>&#160;              }</div>
<div class="line"><a name="l00112"></a><span class="lineno">  112</span>&#160;            } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (!rooted) {</div>
<div class="line"><a name="l00113"></a><span class="lineno">  113</span>&#160;              <span class="keywordflow">if</span> (out.W() &gt; 0) {</div>
<div class="line"><a name="l00114"></a><span class="lineno">  114</span>&#160;                out.Append(<span class="charliteral">&#39;/&#39;</span>);</div>
<div class="line"><a name="l00115"></a><span class="lineno">  115</span>&#160;              }</div>
<div class="line"><a name="l00116"></a><span class="lineno">  116</span>&#160;              out.Append(<span class="charliteral">&#39;.&#39;</span>);</div>
<div class="line"><a name="l00117"></a><span class="lineno">  117</span>&#160;              out.Append(<span class="charliteral">&#39;.&#39;</span>);</div>
<div class="line"><a name="l00118"></a><span class="lineno">  118</span>&#160;              dotdot = out.W();</div>
<div class="line"><a name="l00119"></a><span class="lineno">  119</span>&#160;            }</div>
<div class="line"><a name="l00120"></a><span class="lineno">  120</span>&#160;            <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00121"></a><span class="lineno">  121</span>&#160;          } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00122"></a><span class="lineno">  122</span>&#160;            <span class="comment">// NO break, to default</span></div>
<div class="line"><a name="l00123"></a><span class="lineno">  123</span>&#160;          }</div>
<div class="line"><a name="l00124"></a><span class="lineno">  124</span>&#160;        } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00125"></a><span class="lineno">  125</span>&#160;          <span class="comment">// NO break, to default</span></div>
<div class="line"><a name="l00126"></a><span class="lineno">  126</span>&#160;        }</div>
<div class="line"><a name="l00127"></a><span class="lineno">  127</span>&#160;        <span class="comment">// if not eligible, no break, execute default</span></div>
<div class="line"><a name="l00128"></a><span class="lineno">  128</span>&#160;      <span class="keywordflow">default</span>:</div>
<div class="line"><a name="l00129"></a><span class="lineno">  129</span>&#160;        <span class="comment">// real path element.</span></div>
<div class="line"><a name="l00130"></a><span class="lineno">  130</span>&#160;        <span class="comment">// add slash if needed</span></div>
<div class="line"><a name="l00131"></a><span class="lineno">  131</span>&#160;        <span class="keywordflow">if</span> ((rooted &amp;&amp; out.W() != 1) || (!rooted &amp;&amp; out.W() != 0)) {</div>
<div class="line"><a name="l00132"></a><span class="lineno">  132</span>&#160;          out.Append(<span class="charliteral">&#39;/&#39;</span>);</div>
<div class="line"><a name="l00133"></a><span class="lineno">  133</span>&#160;        }</div>
<div class="line"><a name="l00134"></a><span class="lineno">  134</span>&#160;        <span class="comment">// copy element</span></div>
<div class="line"><a name="l00135"></a><span class="lineno">  135</span>&#160;        <span class="keywordflow">while</span> (r &lt; n &amp;&amp; in[r] != <span class="charliteral">&#39;/&#39;</span>) {</div>
<div class="line"><a name="l00136"></a><span class="lineno">  136</span>&#160;          out.Append(in[r]);</div>
<div class="line"><a name="l00137"></a><span class="lineno">  137</span>&#160;          r++;</div>
<div class="line"><a name="l00138"></a><span class="lineno">  138</span>&#160;        }</div>
<div class="line"><a name="l00139"></a><span class="lineno">  139</span>&#160;    }</div>
<div class="line"><a name="l00140"></a><span class="lineno">  140</span>&#160;  }</div>
<div class="line"><a name="l00141"></a><span class="lineno">  141</span>&#160; </div>
<div class="line"><a name="l00142"></a><span class="lineno">  142</span>&#160;  <span class="keywordflow">if</span> (out.W() == 0) {</div>
<div class="line"><a name="l00143"></a><span class="lineno">  143</span>&#160;    <span class="keywordflow">return</span> <span class="stringliteral">&quot;.&quot;</span>;</div>
<div class="line"><a name="l00144"></a><span class="lineno">  144</span>&#160;  }</div>
<div class="line"><a name="l00145"></a><span class="lineno">  145</span>&#160; </div>
<div class="line"><a name="l00146"></a><span class="lineno">  146</span>&#160;  <span class="keywordflow">return</span> out.ToString();</div>
<div class="line"><a name="l00147"></a><span class="lineno">  147</span>&#160;}</div>
<div class="line"><a name="l00148"></a><span class="lineno">  148</span>&#160;<span class="comment"></span> </div>
<div class="line"><a name="l00149"></a><span class="lineno">  149</span>&#160;<span class="comment">/// JoinPath joins any number of path elements into a single path, adding a</span></div>
<div class="line"><a name="l00150"></a><span class="lineno">  150</span>&#160;<span class="comment">/// separating slash if necessary. The result is Cleaned; in particular,</span></div>
<div class="line"><a name="l00151"></a><span class="lineno">  151</span>&#160;<span class="comment">/// all empty strings are ignored.</span></div>
<div class="line"><a name="l00152"></a><span class="lineno">  152</span>&#160;<span class="comment"></span><span class="keyword">template</span> &lt;<span class="keyword">typename</span>... T&gt;</div>
<div class="line"><a name="l00153"></a><span class="lineno"><a class="line" href="namespaceargcv_1_1path.html#a1012ca64abfd60c725bbb95c4137d588">  153</a></span>&#160;<span class="keywordtype">string</span> <a class="code" href="namespaceargcv_1_1path.html#a1012ca64abfd60c725bbb95c4137d588">JoinPath</a>(<span class="keyword">const</span> T &amp;...args) noexcept {</div>
<div class="line"><a name="l00154"></a><span class="lineno">  154</span>&#160;  <span class="keywordflow">return</span> internal::JoinPathImpl({args...});</div>
<div class="line"><a name="l00155"></a><span class="lineno">  155</span>&#160;}</div>
<div class="line"><a name="l00156"></a><span class="lineno">  156</span>&#160;<span class="comment"></span> </div>
<div class="line"><a name="l00157"></a><span class="lineno">  157</span>&#160;<span class="comment">/// SplitFilename splits path immediately following the final slash,</span></div>
<div class="line"><a name="l00158"></a><span class="lineno">  158</span>&#160;<span class="comment">/// separating it into a directory and file name component.</span></div>
<div class="line"><a name="l00159"></a><span class="lineno">  159</span>&#160;<span class="comment">///</span></div>
<div class="line"><a name="l00160"></a><span class="lineno">  160</span>&#160;<span class="comment">/// If there is no slash in path, Split returns an empty dir and</span></div>
<div class="line"><a name="l00161"></a><span class="lineno">  161</span>&#160;<span class="comment">/// file set to path.</span></div>
<div class="line"><a name="l00162"></a><span class="lineno">  162</span>&#160;<span class="comment">/// The returned values have the property that in = dir+file.</span></div>
<div class="line"><a name="l00163"></a><span class="lineno"><a class="line" href="namespaceargcv_1_1path.html#a5cdb4dd0dd85db8ec750e82f2c12e38c">  163</a></span>&#160;<span class="comment"></span><span class="keyword">inline</span> <span class="keywordtype">void</span> <a class="code" href="namespaceargcv_1_1path.html#a5cdb4dd0dd85db8ec750e82f2c12e38c">SplitFilename</a>(<a class="code" href="namespaceargcv.html#a775cf32fa3d656254b2dbc0b62dc0ea1">string_view</a> in, <a class="code" href="namespaceargcv.html#a775cf32fa3d656254b2dbc0b62dc0ea1">string_view</a> *dir,</div>
<div class="line"><a name="l00164"></a><span class="lineno">  164</span>&#160;                          <a class="code" href="namespaceargcv.html#a775cf32fa3d656254b2dbc0b62dc0ea1">string_view</a> *file) noexcept {</div>
<div class="line"><a name="l00165"></a><span class="lineno">  165</span>&#160;  <span class="comment">// http://www.cplusplus.com/reference/string/string/find_last_of/</span></div>
<div class="line"><a name="l00166"></a><span class="lineno">  166</span>&#160;  std::size_t found = in.find_last_of(<span class="stringliteral">&quot;/&quot;</span>);</div>
<div class="line"><a name="l00167"></a><span class="lineno">  167</span>&#160;  <span class="comment">// LOG(INFO) &lt;&lt; &quot;SplitFilename...[&quot; &lt;&lt; in &lt;&lt; &quot;]=&gt; [&quot; &lt;&lt; found &lt;&lt; &quot;]&quot;</span></div>
<div class="line"><a name="l00168"></a><span class="lineno">  168</span>&#160;  <span class="comment">//           &lt;&lt; &quot;check&quot; &lt;&lt; (found == string_view::npos);</span></div>
<div class="line"><a name="l00169"></a><span class="lineno">  169</span>&#160;  <span class="keywordflow">if</span> (dir) {</div>
<div class="line"><a name="l00170"></a><span class="lineno">  170</span>&#160;    <span class="keywordflow">if</span> (found == string_view::npos) {</div>
<div class="line"><a name="l00171"></a><span class="lineno">  171</span>&#160;      *dir = <span class="stringliteral">&quot;&quot;</span>;</div>
<div class="line"><a name="l00172"></a><span class="lineno">  172</span>&#160;    } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00173"></a><span class="lineno">  173</span>&#160;      <span class="comment">// LOG(INFO) &lt;&lt; &quot;SplitFilename...[&quot; &lt;&lt; in &lt;&lt; &quot;]=&gt; [&quot; &lt;&lt; found &lt;&lt; &quot;]&quot;</span></div>
<div class="line"><a name="l00174"></a><span class="lineno">  174</span>&#160;      <span class="comment">//           &lt;&lt; &quot;check&quot; &lt;&lt; (found == string_view::npos) &lt;&lt; &quot; ~~~ &quot;</span></div>
<div class="line"><a name="l00175"></a><span class="lineno">  175</span>&#160;      <span class="comment">//           &lt;&lt; in.substr(0, found + 1);</span></div>
<div class="line"><a name="l00176"></a><span class="lineno">  176</span>&#160;      *dir = in.substr(0, found + 1);  <span class="comment">//</span></div>
<div class="line"><a name="l00177"></a><span class="lineno">  177</span>&#160;    }</div>
<div class="line"><a name="l00178"></a><span class="lineno">  178</span>&#160;  }</div>
<div class="line"><a name="l00179"></a><span class="lineno">  179</span>&#160;  <span class="keywordflow">if</span> (file) {</div>
<div class="line"><a name="l00180"></a><span class="lineno">  180</span>&#160;    *file = in.substr(found + 1);</div>
<div class="line"><a name="l00181"></a><span class="lineno">  181</span>&#160;  }</div>
<div class="line"><a name="l00182"></a><span class="lineno">  182</span>&#160;}</div>
<div class="line"><a name="l00183"></a><span class="lineno">  183</span>&#160;<span class="comment"></span> </div>
<div class="line"><a name="l00184"></a><span class="lineno">  184</span>&#160;<span class="comment">/// IsAbsPath detecteted whether to be a absolute path</span></div>
<div class="line"><a name="l00185"></a><span class="lineno"><a class="line" href="namespaceargcv_1_1path.html#a0ce3e62fd21ac0df66bbfea877517d9f">  185</a></span>&#160;<span class="comment"></span><span class="keyword">inline</span> <span class="keywordtype">bool</span> <a class="code" href="namespaceargcv_1_1path.html#a0ce3e62fd21ac0df66bbfea877517d9f">IsAbsPath</a>(<a class="code" href="namespaceargcv.html#a775cf32fa3d656254b2dbc0b62dc0ea1">string_view</a> in) noexcept {</div>
<div class="line"><a name="l00186"></a><span class="lineno">  186</span>&#160;  <span class="keywordflow">return</span> in.length() &gt; 0 &amp;&amp; in[0] == <span class="charliteral">&#39;/&#39;</span>;</div>
<div class="line"><a name="l00187"></a><span class="lineno">  187</span>&#160;}</div>
<div class="line"><a name="l00188"></a><span class="lineno">  188</span>&#160;<span class="comment"></span> </div>
<div class="line"><a name="l00189"></a><span class="lineno">  189</span>&#160;<span class="comment">/// Dirname returns all but the last element of path, typically the path&#39;s</span></div>
<div class="line"><a name="l00190"></a><span class="lineno">  190</span>&#160;<span class="comment">/// directory.</span></div>
<div class="line"><a name="l00191"></a><span class="lineno">  191</span>&#160;<span class="comment">///</span></div>
<div class="line"><a name="l00192"></a><span class="lineno">  192</span>&#160;<span class="comment">/// After dropping the final element using Split, the path is Cleaned</span></div>
<div class="line"><a name="l00193"></a><span class="lineno">  193</span>&#160;<span class="comment">/// and trailing slashes are removed. If the path is empty, Dirname returns &quot;.&quot;.</span></div>
<div class="line"><a name="l00194"></a><span class="lineno">  194</span>&#160;<span class="comment">/// If the path consists entirely of slashes followed by non-slash bytes,</span></div>
<div class="line"><a name="l00195"></a><span class="lineno">  195</span>&#160;<span class="comment">/// Dirname returns a single slash. In any other case, the returned path does</span></div>
<div class="line"><a name="l00196"></a><span class="lineno">  196</span>&#160;<span class="comment">/// not end in a slash.</span></div>
<div class="line"><a name="l00197"></a><span class="lineno"><a class="line" href="namespaceargcv_1_1path.html#a85f1f89a996266b7b31638ea127cc873">  197</a></span>&#160;<span class="comment"></span><span class="keyword">inline</span> <span class="keywordtype">string</span> <a class="code" href="namespaceargcv_1_1path.html#a85f1f89a996266b7b31638ea127cc873">Dirname</a>(<a class="code" href="namespaceargcv.html#a775cf32fa3d656254b2dbc0b62dc0ea1">string_view</a> in) noexcept {</div>
<div class="line"><a name="l00198"></a><span class="lineno">  198</span>&#160;  <a class="code" href="namespaceargcv.html#a775cf32fa3d656254b2dbc0b62dc0ea1">string_view</a> dir;</div>
<div class="line"><a name="l00199"></a><span class="lineno">  199</span>&#160;  <a class="code" href="namespaceargcv_1_1path.html#a5cdb4dd0dd85db8ec750e82f2c12e38c">SplitFilename</a>(in, &amp;dir, <span class="keyword">nullptr</span>);</div>
<div class="line"><a name="l00200"></a><span class="lineno">  200</span>&#160;  <span class="comment">// LOG(INFO) &lt;&lt; &quot;Dirname... [&quot; &lt;&lt; in &lt;&lt; &quot;] =&gt; [&quot; &lt;&lt; dir &lt;&lt; &quot;]&quot;;</span></div>
<div class="line"><a name="l00201"></a><span class="lineno">  201</span>&#160;  <span class="keywordflow">return</span> <a class="code" href="namespaceargcv_1_1path.html#a4698c36133c2270117be53efe80f7b61">CleanPath</a>(dir);</div>
<div class="line"><a name="l00202"></a><span class="lineno">  202</span>&#160;}</div>
<div class="line"><a name="l00203"></a><span class="lineno">  203</span>&#160;<span class="comment"></span> </div>
<div class="line"><a name="l00204"></a><span class="lineno">  204</span>&#160;<span class="comment">/// Basename returns the last element of path.</span></div>
<div class="line"><a name="l00205"></a><span class="lineno">  205</span>&#160;<span class="comment">/// Trailing slashes are removed before extracting the last element.</span></div>
<div class="line"><a name="l00206"></a><span class="lineno">  206</span>&#160;<span class="comment">/// If the path is empty, Base returns &quot;.&quot;.</span></div>
<div class="line"><a name="l00207"></a><span class="lineno">  207</span>&#160;<span class="comment">/// If the path consists entirely of slashes, Base returns &quot;/&quot;.</span></div>
<div class="line"><a name="l00208"></a><span class="lineno"><a class="line" href="namespaceargcv_1_1path.html#ad704d6186e7b00815e13ec3d59362f79">  208</a></span>&#160;<span class="comment"></span><span class="keyword">inline</span> <span class="keywordtype">string</span> <a class="code" href="namespaceargcv_1_1path.html#ad704d6186e7b00815e13ec3d59362f79">Basename</a>(<a class="code" href="namespaceargcv.html#a775cf32fa3d656254b2dbc0b62dc0ea1">string_view</a> in) noexcept {</div>
<div class="line"><a name="l00209"></a><span class="lineno">  209</span>&#160;  <span class="keywordflow">if</span> (in == <span class="stringliteral">&quot;&quot;</span>) {</div>
<div class="line"><a name="l00210"></a><span class="lineno">  210</span>&#160;    <span class="keywordflow">return</span> <span class="stringliteral">&quot;.&quot;</span>;</div>
<div class="line"><a name="l00211"></a><span class="lineno">  211</span>&#160;  }</div>
<div class="line"><a name="l00212"></a><span class="lineno">  212</span>&#160;  internal::PathBuff out(in);</div>
<div class="line"><a name="l00213"></a><span class="lineno">  213</span>&#160;  <span class="comment">// Strip trailing slashes.</span></div>
<div class="line"><a name="l00214"></a><span class="lineno">  214</span>&#160;  <span class="keywordflow">while</span> (out.W() &gt; 0 &amp;&amp; out.Last() == <span class="charliteral">&#39;/&#39;</span>) {</div>
<div class="line"><a name="l00215"></a><span class="lineno">  215</span>&#160;    out.Backspace();</div>
<div class="line"><a name="l00216"></a><span class="lineno">  216</span>&#160;  }</div>
<div class="line"><a name="l00217"></a><span class="lineno">  217</span>&#160; </div>
<div class="line"><a name="l00218"></a><span class="lineno">  218</span>&#160;  <span class="comment">// string oin = out.ToString();</span></div>
<div class="line"><a name="l00219"></a><span class="lineno">  219</span>&#160;  <a class="code" href="namespaceargcv.html#a775cf32fa3d656254b2dbc0b62dc0ea1">string_view</a> elem;</div>
<div class="line"><a name="l00220"></a><span class="lineno">  220</span>&#160;  <span class="comment">// SplitFilename(out.ToString(), nullptr, &amp;elem);</span></div>
<div class="line"><a name="l00221"></a><span class="lineno">  221</span>&#160;  <a class="code" href="namespaceargcv_1_1path.html#a5cdb4dd0dd85db8ec750e82f2c12e38c">SplitFilename</a>(out.ToView(), <span class="keyword">nullptr</span>, &amp;elem);</div>
<div class="line"><a name="l00222"></a><span class="lineno">  222</span>&#160;  <span class="comment">// If empty now, it had only slashes.</span></div>
<div class="line"><a name="l00223"></a><span class="lineno">  223</span>&#160;  <span class="keywordflow">if</span> (elem == <span class="stringliteral">&quot;&quot;</span>) {</div>
<div class="line"><a name="l00224"></a><span class="lineno">  224</span>&#160;    <span class="keywordflow">return</span> <span class="stringliteral">&quot;/&quot;</span>;</div>
<div class="line"><a name="l00225"></a><span class="lineno">  225</span>&#160;  }</div>
<div class="line"><a name="l00226"></a><span class="lineno">  226</span>&#160;  <span class="keywordflow">return</span> <a class="code" href="namespaceargcv.html#ac4307817817de9614dd28c828ac9f93a">string</a>(elem);</div>
<div class="line"><a name="l00227"></a><span class="lineno">  227</span>&#160;}</div>
<div class="line"><a name="l00228"></a><span class="lineno">  228</span>&#160; </div>
<div class="line"><a name="l00229"></a><span class="lineno">  229</span>&#160;}  <span class="comment">// namespace path</span></div>
<div class="line"><a name="l00230"></a><span class="lineno">  230</span>&#160; </div>
<div class="line"><a name="l00231"></a><span class="lineno">  231</span>&#160;}  <span class="comment">// namespace argcv</span></div>
<div class="line"><a name="l00232"></a><span class="lineno">  232</span>&#160; </div>
<div class="line"><a name="l00233"></a><span class="lineno">  233</span>&#160;<span class="preprocessor">#endif  </span><span class="comment">// ARGCV_PATH_PATH_H_</span></div>
<div class="ttc" id="anamespaceargcv_1_1path_html_a0ce3e62fd21ac0df66bbfea877517d9f"><div class="ttname"><a href="namespaceargcv_1_1path.html#a0ce3e62fd21ac0df66bbfea877517d9f">argcv::path::IsAbsPath</a></div><div class="ttdeci">bool IsAbsPath(string_view in) noexcept</div><div class="ttdoc">IsAbsPath detecteted whether to be a absolute path.</div><div class="ttdef"><b>Definition:</b> path.h:185</div></div>
<div class="ttc" id="anamespaceargcv_1_1path_html_a1012ca64abfd60c725bbb95c4137d588"><div class="ttname"><a href="namespaceargcv_1_1path.html#a1012ca64abfd60c725bbb95c4137d588">argcv::path::JoinPath</a></div><div class="ttdeci">string JoinPath(const T &amp;...args) noexcept</div><div class="ttdef"><b>Definition:</b> path.h:153</div></div>
<div class="ttc" id="anamespaceargcv_1_1path_html_a4698c36133c2270117be53efe80f7b61"><div class="ttname"><a href="namespaceargcv_1_1path.html#a4698c36133c2270117be53efe80f7b61">argcv::path::CleanPath</a></div><div class="ttdeci">string CleanPath(string_view in) noexcept</div><div class="ttdef"><b>Definition:</b> path.h:70</div></div>
<div class="ttc" id="anamespaceargcv_1_1path_html_a5cdb4dd0dd85db8ec750e82f2c12e38c"><div class="ttname"><a href="namespaceargcv_1_1path.html#a5cdb4dd0dd85db8ec750e82f2c12e38c">argcv::path::SplitFilename</a></div><div class="ttdeci">void SplitFilename(string_view in, string_view *dir, string_view *file) noexcept</div><div class="ttdef"><b>Definition:</b> path.h:163</div></div>
<div class="ttc" id="anamespaceargcv_1_1path_html_a85f1f89a996266b7b31638ea127cc873"><div class="ttname"><a href="namespaceargcv_1_1path.html#a85f1f89a996266b7b31638ea127cc873">argcv::path::Dirname</a></div><div class="ttdeci">string Dirname(string_view in) noexcept</div><div class="ttdef"><b>Definition:</b> path.h:197</div></div>
<div class="ttc" id="anamespaceargcv_1_1path_html_ad704d6186e7b00815e13ec3d59362f79"><div class="ttname"><a href="namespaceargcv_1_1path.html#ad704d6186e7b00815e13ec3d59362f79">argcv::path::Basename</a></div><div class="ttdeci">string Basename(string_view in) noexcept</div><div class="ttdef"><b>Definition:</b> path.h:208</div></div>
<div class="ttc" id="anamespaceargcv_html"><div class="ttname"><a href="namespaceargcv.html">argcv</a></div><div class="ttdoc">Type definitions.</div><div class="ttdef"><b>Definition:</b> atomic.h:10</div></div>
<div class="ttc" id="anamespaceargcv_html_a775cf32fa3d656254b2dbc0b62dc0ea1"><div class="ttname"><a href="namespaceargcv.html#a775cf32fa3d656254b2dbc0b62dc0ea1">argcv::string_view</a></div><div class="ttdeci">absl::string_view string_view</div><div class="ttdef"><b>Definition:</b> types.h:82</div></div>
<div class="ttc" id="anamespaceargcv_html_ac4307817817de9614dd28c828ac9f93a"><div class="ttname"><a href="namespaceargcv.html#ac4307817817de9614dd28c828ac9f93a">argcv::string</a></div><div class="ttdeci">std::basic_string&lt; char &gt; string</div><div class="ttdef"><b>Definition:</b> types.h:84</div></div>
<div class="ttc" id="atypes_8h_html"><div class="ttname"><a href="types_8h.html">types.h</a></div></div>
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