aboutsummaryrefslogblamecommitdiffstatshomepage
path: root/convert_8cpp_source.html
blob: cbc1caf3039e66fc7bb6c252ffec7d4c44955c24 (plain) (tree)

















































































































































































































































                                                                                                                                                                                                                                                                                                                                                                    
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "https://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
<meta http-equiv="X-UA-Compatible" content="IE=9"/>
<meta name="generator" content="Doxygen 1.9.1"/>
<meta name="viewport" content="width=device-width, initial-scale=1"/>
<title>winapi_utf8: src/convert.cpp Source File</title>
<link href="tabs.css" rel="stylesheet" type="text/css"/>
<script type="text/javascript" src="jquery.js"></script>
<script type="text/javascript" src="dynsections.js"></script>
<link href="search/search.css" rel="stylesheet" type="text/css"/>
<script type="text/javascript" src="search/searchdata.js"></script>
<script type="text/javascript" src="search/search.js"></script>
<link href="doxygen.css" rel="stylesheet" type="text/css" />
</head>
<body>
<div id="top"><!-- do not remove this div, it is closed by doxygen! -->
<div id="titlearea">
<table cellspacing="0" cellpadding="0">
 <tbody>
 <tr style="height: 56px;">
  <td id="projectalign" style="padding-left: 0.5em;">
   <div id="projectname">winapi_utf8
   </div>
  </td>
 </tr>
 </tbody>
</table>
</div>
<!-- end header part -->
<!-- Generated by Doxygen 1.9.1 -->
<script type="text/javascript">
/* @license magnet:?xt=urn:btih:cf05388f2679ee054f2beb29a391d25f4e673ac3&amp;dn=gpl-2.0.txt GPL-v2 */
var searchBox = new SearchBox("searchBox", "search",false,'Search','.html');
/* @license-end */
</script>
<script type="text/javascript" src="menudata.js"></script>
<script type="text/javascript" src="menu.js"></script>
<script type="text/javascript">
/* @license magnet:?xt=urn:btih:cf05388f2679ee054f2beb29a391d25f4e673ac3&amp;dn=gpl-2.0.txt GPL-v2 */
$(function() {
  initMenu('',true,false,'search.php','Search');
  $(document).ready(function() { init_search(); });
});
/* @license-end */</script>
<div id="main-nav"></div>
<!-- window showing the filter options -->
<div id="MSearchSelectWindow"
     onmouseover="return searchBox.OnSearchSelectShow()"
     onmouseout="return searchBox.OnSearchSelectHide()"
     onkeydown="return searchBox.OnSearchSelectKey(event)">
</div>

<!-- iframe showing the search results (closed by default) -->
<div id="MSearchResultsWindow">
<iframe src="javascript:void(0)" frameborder="0" 
        name="MSearchResults" id="MSearchResults">
</iframe>
</div>

<div id="nav-path" class="navpath">
  <ul>
<li class="navelem"><a class="el" href="dir_68267d1309a1af8e8297ef4c3efbcdba.html">src</a></li>  </ul>
</div>
</div><!-- top -->
<div class="header">
  <div class="headertitle">
<div class="title">convert.cpp</div>  </div>
</div><!--header-->
<div class="contents">
<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;<span class="comment">// Copyright (c) 2020 Egor Tensin &lt;Egor.Tensin@gmail.com&gt;</span></div>
<div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160;<span class="comment">// This file is part of the &quot;winapi-utf8&quot; project.</span></div>
<div class="line"><a name="l00003"></a><span class="lineno">    3</span>&#160;<span class="comment">// For details, see https://github.com/egor-tensin/winapi-utf8.</span></div>
<div class="line"><a name="l00004"></a><span class="lineno">    4</span>&#160;<span class="comment">// Distributed under the MIT License.</span></div>
<div class="line"><a name="l00005"></a><span class="lineno">    5</span>&#160; </div>
<div class="line"><a name="l00006"></a><span class="lineno">    6</span>&#160;<span class="preprocessor">#include &lt;<a class="code" href="utf8_8hpp.html">winapi/utf8.hpp</a>&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 &lt;windows.h&gt;</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="preprocessor">#include &lt;cstddef&gt;</span></div>
<div class="line"><a name="l00011"></a><span class="lineno">   11</span>&#160;<span class="preprocessor">#include &lt;cstdint&gt;</span></div>
<div class="line"><a name="l00012"></a><span class="lineno">   12</span>&#160;<span class="preprocessor">#include &lt;sstream&gt;</span></div>
<div class="line"><a name="l00013"></a><span class="lineno">   13</span>&#160;<span class="preprocessor">#include &lt;stdexcept&gt;</span></div>
<div class="line"><a name="l00014"></a><span class="lineno">   14</span>&#160;<span class="preprocessor">#include &lt;string&gt;</span></div>
<div class="line"><a name="l00015"></a><span class="lineno">   15</span>&#160;<span class="preprocessor">#include &lt;vector&gt;</span></div>
<div class="line"><a name="l00016"></a><span class="lineno">   16</span>&#160; </div>
<div class="line"><a name="l00017"></a><span class="lineno">   17</span>&#160;<span class="keyword">namespace </span>winapi {</div>
<div class="line"><a name="l00018"></a><span class="lineno">   18</span>&#160;<span class="keyword">namespace </span>{</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;std::runtime_error error(<span class="keyword">const</span> <span class="keywordtype">char</span>* <span class="keyword">function</span>, DWORD code) {</div>
<div class="line"><a name="l00021"></a><span class="lineno">   21</span>&#160;    std::ostringstream oss;</div>
<div class="line"><a name="l00022"></a><span class="lineno">   22</span>&#160;    oss &lt;&lt; <span class="stringliteral">&quot;Function &quot;</span> &lt;&lt; <span class="keyword">function</span> &lt;&lt; <span class="stringliteral">&quot; failed with error code &quot;</span> &lt;&lt; code;</div>
<div class="line"><a name="l00023"></a><span class="lineno">   23</span>&#160;    <span class="keywordflow">return</span> std::runtime_error{oss.str()};</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; </div>
<div class="line"><a name="l00026"></a><span class="lineno">   26</span>&#160;<span class="keywordtype">bool</span> size_t_to_int(std::size_t src, int32_t&amp; dest) {</div>
<div class="line"><a name="l00027"></a><span class="lineno">   27</span>&#160;    <span class="keywordflow">if</span> (src &gt; <span class="keyword">static_cast&lt;</span>uint32_t<span class="keyword">&gt;</span>(INT32_MAX))</div>
<div class="line"><a name="l00028"></a><span class="lineno">   28</span>&#160;        <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00029"></a><span class="lineno">   29</span>&#160;    dest = <span class="keyword">static_cast&lt;</span>int32_t<span class="keyword">&gt;</span>(src);</div>
<div class="line"><a name="l00030"></a><span class="lineno">   30</span>&#160;    <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a name="l00031"></a><span class="lineno">   31</span>&#160;}</div>
<div class="line"><a name="l00032"></a><span class="lineno">   32</span>&#160; </div>
<div class="line"><a name="l00033"></a><span class="lineno">   33</span>&#160;<span class="keywordtype">bool</span> int_to_size_t(int32_t src, std::size_t&amp; dest) {</div>
<div class="line"><a name="l00034"></a><span class="lineno">   34</span>&#160;    <span class="keywordflow">if</span> (src &lt; 0 || <span class="keyword">static_cast&lt;</span>uint32_t<span class="keyword">&gt;</span>(src) &gt; SIZE_MAX)</div>
<div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160;        <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160;    dest = <span class="keyword">static_cast&lt;</span>std::size_t<span class="keyword">&gt;</span>(src);</div>
<div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160;    <span class="keywordflow">return</span> <span class="keyword">true</span>;</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; </div>
<div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;int32_t convert_input_bytes_to_bytes(std::size_t nb) {</div>
<div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;    int32_t real_nb = 0;</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="keywordflow">if</span> (!size_t_to_int(nb, real_nb)) {</div>
<div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160;        std::ostringstream oss;</div>
<div class="line"><a name="l00045"></a><span class="lineno">   45</span>&#160;        oss &lt;&lt; <span class="stringliteral">&quot;Input buffer is too large at &quot;</span> &lt;&lt; nb &lt;&lt; <span class="stringliteral">&quot; bytes&quot;</span>;</div>
<div class="line"><a name="l00046"></a><span class="lineno">   46</span>&#160;        <span class="keywordflow">throw</span> std::runtime_error{oss.str()};</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="keywordflow">return</span> real_nb;</div>
<div class="line"><a name="l00050"></a><span class="lineno">   50</span>&#160;}</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;int32_t convert_input_bytes_to_chars(std::size_t nb) {</div>
<div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;    <span class="keywordflow">if</span> (nb % <span class="keyword">sizeof</span>(WCHAR) != 0) {</div>
<div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;        std::ostringstream oss;</div>
<div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;        oss &lt;&lt; <span class="stringliteral">&quot;Buffer size invalid at &quot;</span> &lt;&lt; nb &lt;&lt; <span class="stringliteral">&quot; bytes&quot;</span>;</div>
<div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;        <span class="keywordflow">throw</span> std::runtime_error{oss.str()};</div>
<div class="line"><a name="l00057"></a><span class="lineno">   57</span>&#160;    }</div>
<div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160; </div>
<div class="line"><a name="l00059"></a><span class="lineno">   59</span>&#160;    <span class="keyword">const</span> std::size_t nch = nb / <span class="keyword">sizeof</span>(WCHAR);</div>
<div class="line"><a name="l00060"></a><span class="lineno">   60</span>&#160;    int32_t real_nch = 0;</div>
<div class="line"><a name="l00061"></a><span class="lineno">   61</span>&#160; </div>
<div class="line"><a name="l00062"></a><span class="lineno">   62</span>&#160;    <span class="keywordflow">if</span> (!size_t_to_int(nch, real_nch)) {</div>
<div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160;        std::ostringstream oss;</div>
<div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160;        oss &lt;&lt; <span class="stringliteral">&quot;Input buffer is too large at &quot;</span> &lt;&lt; nch &lt;&lt; <span class="stringliteral">&quot; characters&quot;</span>;</div>
<div class="line"><a name="l00065"></a><span class="lineno">   65</span>&#160;        <span class="keywordflow">throw</span> std::runtime_error{oss.str()};</div>
<div class="line"><a name="l00066"></a><span class="lineno">   66</span>&#160;    }</div>
<div class="line"><a name="l00067"></a><span class="lineno">   67</span>&#160; </div>
<div class="line"><a name="l00068"></a><span class="lineno">   68</span>&#160;    <span class="keywordflow">return</span> real_nch;</div>
<div class="line"><a name="l00069"></a><span class="lineno">   69</span>&#160;}</div>
<div class="line"><a name="l00070"></a><span class="lineno">   70</span>&#160; </div>
<div class="line"><a name="l00071"></a><span class="lineno">   71</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> CharT&gt;</div>
<div class="line"><a name="l00072"></a><span class="lineno">   72</span>&#160;std::vector&lt;CharT&gt; output_buffer(int32_t size) {</div>
<div class="line"><a name="l00073"></a><span class="lineno">   73</span>&#160;    std::size_t real_size = 0;</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="keywordflow">if</span> (!int_to_size_t(size, real_size)) {</div>
<div class="line"><a name="l00076"></a><span class="lineno">   76</span>&#160;        std::ostringstream oss;</div>
<div class="line"><a name="l00077"></a><span class="lineno">   77</span>&#160;        oss &lt;&lt; <span class="stringliteral">&quot;Buffer size invalid at &quot;</span> &lt;&lt; size &lt;&lt; <span class="stringliteral">&quot; bytes&quot;</span>;</div>
<div class="line"><a name="l00078"></a><span class="lineno">   78</span>&#160;        <span class="keywordflow">throw</span> std::runtime_error{oss.str()};</div>
<div class="line"><a name="l00079"></a><span class="lineno">   79</span>&#160;    }</div>
<div class="line"><a name="l00080"></a><span class="lineno">   80</span>&#160; </div>
<div class="line"><a name="l00081"></a><span class="lineno">   81</span>&#160;    std::vector&lt;CharT&gt; buffer;</div>
<div class="line"><a name="l00082"></a><span class="lineno">   82</span>&#160;    buffer.resize(real_size);</div>
<div class="line"><a name="l00083"></a><span class="lineno">   83</span>&#160;    <span class="keywordflow">return</span> buffer;</div>
<div class="line"><a name="l00084"></a><span class="lineno">   84</span>&#160;}</div>
<div class="line"><a name="l00085"></a><span class="lineno">   85</span>&#160; </div>
<div class="line"><a name="l00086"></a><span class="lineno">   86</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> CharT&gt;</div>
<div class="line"><a name="l00087"></a><span class="lineno">   87</span>&#160;<span class="keywordtype">void</span> verify_output(<span class="keyword">const</span> std::vector&lt;CharT&gt;&amp; expected, int32_t _actual_size) {</div>
<div class="line"><a name="l00088"></a><span class="lineno">   88</span>&#160;    std::size_t actual_size = 0;</div>
<div class="line"><a name="l00089"></a><span class="lineno">   89</span>&#160; </div>
<div class="line"><a name="l00090"></a><span class="lineno">   90</span>&#160;    <span class="keywordflow">if</span> (!int_to_size_t(_actual_size, actual_size) || expected.size() != actual_size) {</div>
<div class="line"><a name="l00091"></a><span class="lineno">   91</span>&#160;        std::ostringstream oss;</div>
<div class="line"><a name="l00092"></a><span class="lineno">   92</span>&#160;        oss &lt;&lt; <span class="stringliteral">&quot;Expected output length &quot;</span> &lt;&lt; expected.size() &lt;&lt; <span class="stringliteral">&quot;, got &quot;</span> &lt;&lt; _actual_size;</div>
<div class="line"><a name="l00093"></a><span class="lineno">   93</span>&#160;        <span class="keywordflow">throw</span> std::runtime_error{oss.str()};</div>
<div class="line"><a name="l00094"></a><span class="lineno">   94</span>&#160;    }</div>
<div class="line"><a name="l00095"></a><span class="lineno">   95</span>&#160;}</div>
<div class="line"><a name="l00096"></a><span class="lineno">   96</span>&#160; </div>
<div class="line"><a name="l00097"></a><span class="lineno">   97</span>&#160;} <span class="comment">// namespace</span></div>
<div class="line"><a name="l00098"></a><span class="lineno">   98</span>&#160; </div>
<div class="line"><a name="l00099"></a><span class="lineno"><a class="line" href="utf8_8hpp.html#a4b174d9e77015c16d3e3ab6ad95000b6">   99</a></span>&#160;std::wstring <a class="code" href="utf8_8hpp.html#a4b174d9e77015c16d3e3ab6ad95000b6">widen</a>(<span class="keyword">const</span> std::string&amp; src) {</div>
<div class="line"><a name="l00100"></a><span class="lineno">  100</span>&#160;    <span class="keywordflow">return</span> <a class="code" href="utf8_8hpp.html#a4b174d9e77015c16d3e3ab6ad95000b6">widen</a>(src.c_str(), src.size());</div>
<div class="line"><a name="l00101"></a><span class="lineno">  101</span>&#160;}</div>
<div class="line"><a name="l00102"></a><span class="lineno">  102</span>&#160; </div>
<div class="line"><a name="l00103"></a><span class="lineno"><a class="line" href="utf8_8hpp.html#a4e76f5bf03006c3d073b189ac937c78f">  103</a></span>&#160;std::wstring <a class="code" href="utf8_8hpp.html#a4b174d9e77015c16d3e3ab6ad95000b6">widen</a>(<span class="keyword">const</span> <span class="keywordtype">void</span>* src, std::size_t in_nb) {</div>
<div class="line"><a name="l00104"></a><span class="lineno">  104</span>&#160;    <span class="keyword">const</span> DWORD flags = MB_ERR_INVALID_CHARS;</div>
<div class="line"><a name="l00105"></a><span class="lineno">  105</span>&#160; </div>
<div class="line"><a name="l00106"></a><span class="lineno">  106</span>&#160;    <span class="keyword">const</span> <span class="keyword">auto</span> in_data = <span class="keyword">reinterpret_cast&lt;</span><span class="keyword">const </span><span class="keywordtype">char</span>*<span class="keyword">&gt;</span>(src);</div>
<div class="line"><a name="l00107"></a><span class="lineno">  107</span>&#160;    <span class="keyword">const</span> <span class="keyword">auto</span> real_in_nb = convert_input_bytes_to_bytes(in_nb);</div>
<div class="line"><a name="l00108"></a><span class="lineno">  108</span>&#160; </div>
<div class="line"><a name="l00109"></a><span class="lineno">  109</span>&#160;    <span class="keyword">auto</span> out_nch = ::MultiByteToWideChar(CP_UTF8, flags, in_data, real_in_nb, NULL, 0);</div>
<div class="line"><a name="l00110"></a><span class="lineno">  110</span>&#160; </div>
<div class="line"><a name="l00111"></a><span class="lineno">  111</span>&#160;    <span class="keywordflow">if</span> (out_nch == 0) {</div>
<div class="line"><a name="l00112"></a><span class="lineno">  112</span>&#160;        <span class="keywordflow">throw</span> error(<span class="stringliteral">&quot;MultiByteToWideChar&quot;</span>, GetLastError());</div>
<div class="line"><a name="l00113"></a><span class="lineno">  113</span>&#160;    }</div>
<div class="line"><a name="l00114"></a><span class="lineno">  114</span>&#160; </div>
<div class="line"><a name="l00115"></a><span class="lineno">  115</span>&#160;    static_assert(<span class="keyword">sizeof</span>(<span class="keywordtype">wchar_t</span>) == <span class="keyword">sizeof</span>(WCHAR), <span class="stringliteral">&quot;wchar_t != WCHAR&quot;</span>);</div>
<div class="line"><a name="l00116"></a><span class="lineno">  116</span>&#160;    <span class="keyword">auto</span> out = output_buffer&lt;wchar_t&gt;(out_nch);</div>
<div class="line"><a name="l00117"></a><span class="lineno">  117</span>&#160; </div>
<div class="line"><a name="l00118"></a><span class="lineno">  118</span>&#160;    out_nch = ::MultiByteToWideChar(CP_UTF8, flags, in_data, real_in_nb, out.data(), out_nch);</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">if</span> (out_nch == 0) {</div>
<div class="line"><a name="l00121"></a><span class="lineno">  121</span>&#160;        <span class="keywordflow">throw</span> error(<span class="stringliteral">&quot;MultiByteToWideChar&quot;</span>, GetLastError());</div>
<div class="line"><a name="l00122"></a><span class="lineno">  122</span>&#160;    }</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;    verify_output(out, out_nch);</div>
<div class="line"><a name="l00125"></a><span class="lineno">  125</span>&#160;    <span class="keywordflow">return</span> {out.data(), out.size()};</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; </div>
<div class="line"><a name="l00128"></a><span class="lineno"><a class="line" href="utf8_8hpp.html#ae643a038e8194c1f0d14bdf9edcafcb7">  128</a></span>&#160;std::string <a class="code" href="utf8_8hpp.html#ae643a038e8194c1f0d14bdf9edcafcb7">narrow</a>(<span class="keyword">const</span> std::wstring&amp; src) {</div>
<div class="line"><a name="l00129"></a><span class="lineno">  129</span>&#160;    static_assert(<span class="keyword">sizeof</span>(<span class="keywordtype">wchar_t</span>) == <span class="keyword">sizeof</span>(WCHAR), <span class="stringliteral">&quot;wchar_t != WCHAR&quot;</span>);</div>
<div class="line"><a name="l00130"></a><span class="lineno">  130</span>&#160;    <span class="keywordflow">return</span> <a class="code" href="utf8_8hpp.html#ae643a038e8194c1f0d14bdf9edcafcb7">narrow</a>(src.c_str(), src.size() * <span class="keyword">sizeof</span>(std::wstring::value_type));</div>
<div class="line"><a name="l00131"></a><span class="lineno">  131</span>&#160;}</div>
<div class="line"><a name="l00132"></a><span class="lineno">  132</span>&#160; </div>
<div class="line"><a name="l00133"></a><span class="lineno"><a class="line" href="utf8_8hpp.html#a2795e1f7649c053417f39b90d3f3480f">  133</a></span>&#160;std::string <a class="code" href="utf8_8hpp.html#ae643a038e8194c1f0d14bdf9edcafcb7">narrow</a>(<span class="keyword">const</span> std::u16string&amp; src) {</div>
<div class="line"><a name="l00134"></a><span class="lineno">  134</span>&#160;    <span class="keywordflow">return</span> <a class="code" href="utf8_8hpp.html#ae643a038e8194c1f0d14bdf9edcafcb7">narrow</a>(src.c_str(), src.size() * <span class="keyword">sizeof</span>(std::u16string::value_type));</div>
<div class="line"><a name="l00135"></a><span class="lineno">  135</span>&#160;}</div>
<div class="line"><a name="l00136"></a><span class="lineno">  136</span>&#160; </div>
<div class="line"><a name="l00137"></a><span class="lineno"><a class="line" href="utf8_8hpp.html#aeeef0f99233162d79ebedc551e87f0d0">  137</a></span>&#160;std::string <a class="code" href="utf8_8hpp.html#ae643a038e8194c1f0d14bdf9edcafcb7">narrow</a>(<span class="keyword">const</span> <span class="keywordtype">void</span>* src, std::size_t in_nb) {</div>
<div class="line"><a name="l00138"></a><span class="lineno">  138</span>&#160;    <span class="keyword">const</span> DWORD flags = WC_ERR_INVALID_CHARS;</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;    <span class="keyword">const</span> <span class="keyword">auto</span> in_data = <span class="keyword">reinterpret_cast&lt;</span><span class="keyword">const </span><span class="keywordtype">wchar_t</span>*<span class="keyword">&gt;</span>(src);</div>
<div class="line"><a name="l00141"></a><span class="lineno">  141</span>&#160;    <span class="keyword">const</span> <span class="keyword">auto</span> in_nch = convert_input_bytes_to_chars(in_nb);</div>
<div class="line"><a name="l00142"></a><span class="lineno">  142</span>&#160; </div>
<div class="line"><a name="l00143"></a><span class="lineno">  143</span>&#160;    <span class="keyword">auto</span> out_nb = ::WideCharToMultiByte(CP_UTF8, flags, in_data, in_nch, NULL, 0, NULL, NULL);</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;    <span class="keywordflow">if</span> (out_nb == 0) {</div>
<div class="line"><a name="l00146"></a><span class="lineno">  146</span>&#160;        <span class="keywordflow">throw</span> error(<span class="stringliteral">&quot;WideCharToMultiByte&quot;</span>, GetLastError());</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; </div>
<div class="line"><a name="l00149"></a><span class="lineno">  149</span>&#160;    <span class="keyword">auto</span> out = output_buffer&lt;char&gt;(out_nb);</div>
<div class="line"><a name="l00150"></a><span class="lineno">  150</span>&#160; </div>
<div class="line"><a name="l00151"></a><span class="lineno">  151</span>&#160;    out_nb = ::WideCharToMultiByte(CP_UTF8, flags, in_data, in_nch, out.data(), out_nb, NULL, NULL);</div>
<div class="line"><a name="l00152"></a><span class="lineno">  152</span>&#160; </div>
<div class="line"><a name="l00153"></a><span class="lineno">  153</span>&#160;    <span class="keywordflow">if</span> (out_nb == 0) {</div>
<div class="line"><a name="l00154"></a><span class="lineno">  154</span>&#160;        <span class="keywordflow">throw</span> error(<span class="stringliteral">&quot;WideCharToMultiByte&quot;</span>, GetLastError());</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; </div>
<div class="line"><a name="l00157"></a><span class="lineno">  157</span>&#160;    verify_output(out, out_nb);</div>
<div class="line"><a name="l00158"></a><span class="lineno">  158</span>&#160;    <span class="keywordflow">return</span> {out.data(), out.size()};</div>
<div class="line"><a name="l00159"></a><span class="lineno">  159</span>&#160;}</div>
<div class="line"><a name="l00160"></a><span class="lineno">  160</span>&#160; </div>
<div class="line"><a name="l00161"></a><span class="lineno">  161</span>&#160;} <span class="comment">// namespace winapi</span></div>
<div class="ttc" id="autf8_8hpp_html"><div class="ttname"><a href="utf8_8hpp.html">utf8.hpp</a></div><div class="ttdoc">UTF-8 &lt;-&gt; UTF-16 conversion functions.</div></div>
<div class="ttc" id="autf8_8hpp_html_a4b174d9e77015c16d3e3ab6ad95000b6"><div class="ttname"><a href="utf8_8hpp.html#a4b174d9e77015c16d3e3ab6ad95000b6">winapi::widen</a></div><div class="ttdeci">std::wstring widen(const std::string &amp;)</div><div class="ttdef"><b>Definition:</b> <a href="convert_8cpp_source.html#l00099">convert.cpp:99</a></div></div>
<div class="ttc" id="autf8_8hpp_html_ae643a038e8194c1f0d14bdf9edcafcb7"><div class="ttname"><a href="utf8_8hpp.html#ae643a038e8194c1f0d14bdf9edcafcb7">winapi::narrow</a></div><div class="ttdeci">std::string narrow(const std::wstring &amp;)</div><div class="ttdef"><b>Definition:</b> <a href="convert_8cpp_source.html#l00128">convert.cpp:128</a></div></div>
</div><!-- fragment --></div><!-- contents -->
<!-- start footer part -->
<hr class="footer"/><address class="footer"><small>
Generated by&#160;<a href="https://www.doxygen.org/index.html"><img class="footer" src="doxygen.svg" width="104" height="31" alt="doxygen"/></a> 1.9.1
</small></address>
</body>
</html>