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<div class="title">Alphanum.hpp</div> </div>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="preprocessor">#pragma once</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment">/*</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> Released under the MIT License - https://opensource.org/licenses/MIT</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"> Permission is hereby granted, free of charge, to any person obtaining</span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> a copy of this software and associated documentation files (the "Software"),</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> to deal in the Software without restriction, including without limitation</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> the rights to use, copy, modify, merge, publish, distribute, sublicense,</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> and/or sell copies of the Software, and to permit persons to whom the</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> Software is furnished to do so, subject to the following conditions:</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"></span> </div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> The above copyright notice and this permission notice shall be included</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> in all copies or substantial portions of the Software.</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"></span> </div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF</span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment"> MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.</span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment"> IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,</span></div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment"> DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR</span></div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment"> OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE</span></div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment"> USE OR OTHER DEALINGS IN THE SOFTWARE.</span></div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="comment">*/</span></div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="preprocessor">#include <string_view></span></div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span>  </div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="keyword">namespace </span>doj</div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> {</div>
<div class="line"><a name="l00027"></a><span class="lineno"><a class="line" href="structdoj_1_1alphanum__compare.html"> 27</a></span> <span class="keyword">struct </span><a class="code" href="structdoj_1_1alphanum__compare.html">alphanum_compare</a></div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> {</div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>  <span class="keyword">static</span> constexpr <span class="keywordtype">bool</span> alphanum_isdigit(<span class="keyword">const</span> <span class="keywordtype">char</span> c) noexcept</div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  {</div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  <span class="keywordflow">return</span> c >= <span class="charliteral">'0'</span> && c <= <span class="charliteral">'9'</span>;</div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>  }</div>
<div class="line"><a name="l00048"></a><span class="lineno"><a class="line" href="structdoj_1_1alphanum__compare.html#ae89bd23966016f379ccf3ea84fc34868"> 48</a></span>  <span class="keyword">static</span> constexpr <span class="keywordtype">int</span> <a class="code" href="structdoj_1_1alphanum__compare.html#ae89bd23966016f379ccf3ea84fc34868">impl</a>(std::string_view ll, std::string_view rr) noexcept</div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  {</div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  <span class="keyword">enum</span> mode_t</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>  STRING,</div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  NUMBER</div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  } mode</div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  = STRING;</div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  </div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  <span class="keyword">const</span> <span class="keywordtype">char</span>* l = ll.data();</div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  <span class="keyword">const</span> <span class="keywordtype">char</span>* r = rr.data();</div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  <span class="keywordflow">while</span>(l != ll.end() && r != rr.end() && *l && *r)</div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  {</div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  <span class="keywordflow">if</span>(mode == STRING)</div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  {</div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  <span class="keywordtype">char</span> l_char{}, r_char{};</div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  <span class="keywordflow">while</span>((l != ll.end() && r != rr.end()) && (l_char = *l) && (r_char = *r))</div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  {</div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  <span class="comment">// check if this are digit characters</span></div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  <span class="keyword">const</span> <span class="keywordtype">bool</span> l_digit = alphanum_isdigit(l_char),</div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  r_digit = alphanum_isdigit(r_char);</div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  <span class="comment">// if both characters are digits, we continue in NUMBER mode</span></div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  <span class="keywordflow">if</span>(l_digit && r_digit)</div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  {</div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  mode = NUMBER;</div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  }</div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  <span class="comment">// if only the left character is a digit, we have a result</span></div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  <span class="keywordflow">if</span>(l_digit)</div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  <span class="keywordflow">return</span> -1;</div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  <span class="comment">// if only the right character is a digit, we have a result</span></div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  <span class="keywordflow">if</span>(r_digit)</div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  <span class="keywordflow">return</span> +1;</div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  <span class="comment">// compute the difference of both characters</span></div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> diff = l_char - r_char;</div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  <span class="comment">// if they differ we have a result</span></div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  <span class="keywordflow">if</span>(diff != 0)</div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  <span class="keywordflow">return</span> diff;</div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  <span class="comment">// otherwise process the next characters</span></div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  ++l;</div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  ++r;</div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  }</div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  }</div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  <span class="keywordflow">else</span> <span class="comment">// mode==NUMBER</span></div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  {</div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  <span class="comment">// get the left number</span></div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> l_int = 0;</div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  <span class="keywordflow">while</span>(l != ll.end() && *l && alphanum_isdigit(*l))</div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  {</div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  <span class="comment">// TODO: this can overflow</span></div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  l_int = l_int * 10 + *l - <span class="charliteral">'0'</span>;</div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  ++l;</div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  }</div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  </div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  <span class="comment">// get the right number</span></div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> r_int = 0;</div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  <span class="keywordflow">while</span>(r != rr.end() && *r && alphanum_isdigit(*r))</div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  {</div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  <span class="comment">// TODO: this can overflow</span></div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  r_int = r_int * 10 + *r - <span class="charliteral">'0'</span>;</div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  ++r;</div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  }</div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  </div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  <span class="comment">// if the difference is not equal to zero, we have a comparison result</span></div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  <span class="keyword">const</span> <span class="keywordtype">long</span> diff = l_int - r_int;</div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  <span class="keywordflow">if</span>(diff != 0)</div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  <span class="keywordflow">return</span> diff;</div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  </div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  <span class="comment">// otherwise we process the next substring in STRING mode</span></div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  mode = STRING;</div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  }</div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  }</div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  </div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  <span class="keywordflow">if</span>(*r)</div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  <span class="keywordflow">return</span> -1;</div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  <span class="keywordflow">if</span>(*l)</div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  <span class="keywordflow">return</span> +1;</div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  <span class="keywordflow">return</span> 0;</div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  }</div>
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  </div>
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  constexpr <span class="keywordtype">bool</span> operator()(std::string_view l, std::string_view r) <span class="keyword">const</span> noexcept</div>
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  {</div>
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  <span class="keywordflow">return</span> <a class="code" href="structdoj_1_1alphanum__compare.html#ae89bd23966016f379ccf3ea84fc34868">impl</a>(l.data(), r.data()) < 0;</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> };</div>
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span> }</div>
<div class="ttc" id="astructdoj_1_1alphanum__compare_html"><div class="ttname"><a href="structdoj_1_1alphanum__compare.html">doj::alphanum_compare</a></div><div class="ttdef"><b>Definition:</b> Alphanum.hpp:28</div></div>
<div class="ttc" id="astructdoj_1_1alphanum__compare_html_ae89bd23966016f379ccf3ea84fc34868"><div class="ttname"><a href="structdoj_1_1alphanum__compare.html#ae89bd23966016f379ccf3ea84fc34868">doj::alphanum_compare::impl</a></div><div class="ttdeci">static constexpr int impl(std::string_view ll, std::string_view rr) noexcept</div><div class="ttdef"><b>Definition:</b> Alphanum.hpp:48</div></div>
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