c
/
Immediate-Mode-UI.Nuklear
镜像来自 https://github.com/Immediate-Mode-UI/Nuklear.git


			
				
					
						
						
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   <div id="projectname">Nuklear
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   <div id="projectbrief">This is a minimal-state, immediate-mode graphical user interface toolkit written in ANSI C and licensed under public domain. It was designed as a simple embeddable user interface for application and does not have any dependencies, a default render backend or OS window/input handling but instead provides a highly modular, library-based approach, with simple input state for input and draw commands describing primitive shapes as output. So instead of providing a layered library that tries to abstract over a number of platform and render backends, it focuses only on the actual UI.</div>
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<div class="header">
  <div class="headertitle"><div class="title">nuklear_utf8.c</div></div>
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<div class="contents">
<div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno">    1</span><span class="preprocessor">#include &quot;<a class="code" href="nuklear_8h.html">nuklear.h</a>&quot;</span></div>
<div class="line"><a id="l00002" name="l00002"></a><span class="lineno">    2</span><span class="preprocessor">#include &quot;nuklear_internal.h&quot;</span></div>
<div class="line"><a id="l00003" name="l00003"></a><span class="lineno">    3</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><span class="comment"> *</span></div>
<div class="line"><a id="l00006" name="l00006"></a><span class="lineno">    6</span><span class="comment"> *                              UTF-8</span></div>
<div class="line"><a id="l00007" name="l00007"></a><span class="lineno">    7</span><span class="comment"> *</span></div>
<div class="line"><a id="l00008" name="l00008"></a><span class="lineno">    8</span><span class="comment"> * ===============================================================*/</span></div>
<div class="line"><a id="l00009" name="l00009"></a><span class="lineno">    9</span>NK_GLOBAL <span class="keyword">const</span> nk_byte nk_utfbyte[<a class="code hl_define" href="nuklear_8h.html#a5751d22e6e68d2bf104010d6422bd28e">NK_UTF_SIZE</a>+1] = {0x80, 0, 0xC0, 0xE0, 0xF0};</div>
<div class="line"><a id="l00010" name="l00010"></a><span class="lineno">   10</span>NK_GLOBAL <span class="keyword">const</span> nk_byte nk_utfmask[<a class="code hl_define" href="nuklear_8h.html#a5751d22e6e68d2bf104010d6422bd28e">NK_UTF_SIZE</a>+1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};</div>
<div class="line"><a id="l00011" name="l00011"></a><span class="lineno">   11</span>NK_GLOBAL <span class="keyword">const</span> nk_uint nk_utfmin[<a class="code hl_define" href="nuklear_8h.html#a5751d22e6e68d2bf104010d6422bd28e">NK_UTF_SIZE</a>+1] = {0, 0, 0x80, 0x800, 0x10000};</div>
<div class="line"><a id="l00012" name="l00012"></a><span class="lineno">   12</span>NK_GLOBAL <span class="keyword">const</span> nk_uint nk_utfmax[<a class="code hl_define" href="nuklear_8h.html#a5751d22e6e68d2bf104010d6422bd28e">NK_UTF_SIZE</a>+1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};</div>
<div class="line"><a id="l00013" name="l00013"></a><span class="lineno">   13</span> </div>
<div class="line"><a id="l00014" name="l00014"></a><span class="lineno">   14</span>NK_INTERN <span class="keywordtype">int</span></div>
<div class="line"><a id="l00015" name="l00015"></a><span class="lineno">   15</span>nk_utf_validate(nk_rune *u, <span class="keywordtype">int</span> i)</div>
<div class="line"><a id="l00016" name="l00016"></a><span class="lineno">   16</span>{</div>
<div class="line"><a id="l00017" name="l00017"></a><span class="lineno">   17</span>    NK_ASSERT(u);</div>
<div class="line"><a id="l00018" name="l00018"></a><span class="lineno">   18</span>    <span class="keywordflow">if</span> (!u) <span class="keywordflow">return</span> 0;</div>
<div class="line"><a id="l00019" name="l00019"></a><span class="lineno">   19</span>    <span class="keywordflow">if</span> (!NK_BETWEEN(*u, nk_utfmin[i], nk_utfmax[i]) ||</div>
<div class="line"><a id="l00020" name="l00020"></a><span class="lineno">   20</span>         NK_BETWEEN(*u, 0xD800, 0xDFFF))</div>
<div class="line"><a id="l00021" name="l00021"></a><span class="lineno">   21</span>            *u = <a class="code hl_define" href="nuklear_8h.html#a3d052e6e91b71a1837356c6f8bebb1a6">NK_UTF_INVALID</a>;</div>
<div class="line"><a id="l00022" name="l00022"></a><span class="lineno">   22</span>    <span class="keywordflow">for</span> (i = 1; *u &gt; nk_utfmax[i]; ++i);</div>
<div class="line"><a id="l00023" name="l00023"></a><span class="lineno">   23</span>    <span class="keywordflow">return</span> i;</div>
<div class="line"><a id="l00024" name="l00024"></a><span class="lineno">   24</span>}</div>
<div class="line"><a id="l00025" name="l00025"></a><span class="lineno">   25</span>NK_INTERN nk_rune</div>
<div class="line"><a id="l00026" name="l00026"></a><span class="lineno">   26</span>nk_utf_decode_byte(<span class="keywordtype">char</span> c, <span class="keywordtype">int</span> *i)</div>
<div class="line"><a id="l00027" name="l00027"></a><span class="lineno">   27</span>{</div>
<div class="line"><a id="l00028" name="l00028"></a><span class="lineno">   28</span>    NK_ASSERT(i);</div>
<div class="line"><a id="l00029" name="l00029"></a><span class="lineno">   29</span>    <span class="keywordflow">if</span> (!i) <span class="keywordflow">return</span> 0;</div>
<div class="line"><a id="l00030" name="l00030"></a><span class="lineno">   30</span>    <span class="keywordflow">for</span>(*i = 0; *i &lt; (int)NK_LEN(nk_utfmask); ++(*i)) {</div>
<div class="line"><a id="l00031" name="l00031"></a><span class="lineno">   31</span>        <span class="keywordflow">if</span> (((nk_byte)c &amp; nk_utfmask[*i]) == nk_utfbyte[*i])</div>
<div class="line"><a id="l00032" name="l00032"></a><span class="lineno">   32</span>            <span class="keywordflow">return</span> (nk_byte)(c &amp; ~nk_utfmask[*i]);</div>
<div class="line"><a id="l00033" name="l00033"></a><span class="lineno">   33</span>    }</div>
<div class="line"><a id="l00034" name="l00034"></a><span class="lineno">   34</span>    <span class="keywordflow">return</span> 0;</div>
<div class="line"><a id="l00035" name="l00035"></a><span class="lineno">   35</span>}</div>
<div class="line"><a id="l00036" name="l00036"></a><span class="lineno">   36</span>NK_API <span class="keywordtype">int</span></div>
<div class="line"><a id="l00037" name="l00037"></a><span class="lineno">   37</span>nk_utf_decode(<span class="keyword">const</span> <span class="keywordtype">char</span> *c, nk_rune *u, <span class="keywordtype">int</span> clen)</div>
<div class="line"><a id="l00038" name="l00038"></a><span class="lineno">   38</span>{</div>
<div class="line"><a id="l00039" name="l00039"></a><span class="lineno">   39</span>    <span class="keywordtype">int</span> i, j, len, type=0;</div>
<div class="line"><a id="l00040" name="l00040"></a><span class="lineno">   40</span>    nk_rune udecoded;</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>    NK_ASSERT(c);</div>
<div class="line"><a id="l00043" name="l00043"></a><span class="lineno">   43</span>    NK_ASSERT(u);</div>
<div class="line"><a id="l00044" name="l00044"></a><span class="lineno">   44</span> </div>
<div class="line"><a id="l00045" name="l00045"></a><span class="lineno">   45</span>    <span class="keywordflow">if</span> (!c || !u) <span class="keywordflow">return</span> 0;</div>
<div class="line"><a id="l00046" name="l00046"></a><span class="lineno">   46</span>    <span class="keywordflow">if</span> (!clen) <span class="keywordflow">return</span> 0;</div>
<div class="line"><a id="l00047" name="l00047"></a><span class="lineno">   47</span>    *u = <a class="code hl_define" href="nuklear_8h.html#a3d052e6e91b71a1837356c6f8bebb1a6">NK_UTF_INVALID</a>;</div>
<div class="line"><a id="l00048" name="l00048"></a><span class="lineno">   48</span> </div>
<div class="line"><a id="l00049" name="l00049"></a><span class="lineno">   49</span>    udecoded = nk_utf_decode_byte(c[0], &amp;len);</div>
<div class="line"><a id="l00050" name="l00050"></a><span class="lineno">   50</span>    <span class="keywordflow">if</span> (!NK_BETWEEN(len, 1, <a class="code hl_define" href="nuklear_8h.html#a5751d22e6e68d2bf104010d6422bd28e">NK_UTF_SIZE</a>+1)) <span class="comment">/* +1 because NK_BETWEEN uses strict upper bound ((a) &lt;= (x) &amp;&amp; (x) &lt; (b)) */</span></div>
<div class="line"><a id="l00051" name="l00051"></a><span class="lineno">   51</span>        <span class="keywordflow">return</span> 1;</div>
<div class="line"><a id="l00052" name="l00052"></a><span class="lineno">   52</span> </div>
<div class="line"><a id="l00053" name="l00053"></a><span class="lineno">   53</span>    <span class="keywordflow">for</span> (i = 1, j = 1; i &lt; clen &amp;&amp; j &lt; len; ++i, ++j) {</div>
<div class="line"><a id="l00054" name="l00054"></a><span class="lineno">   54</span>        udecoded = (udecoded &lt;&lt; 6) | nk_utf_decode_byte(c[i], &amp;type);</div>
<div class="line"><a id="l00055" name="l00055"></a><span class="lineno">   55</span>        <span class="keywordflow">if</span> (type != 0)</div>
<div class="line"><a id="l00056" name="l00056"></a><span class="lineno">   56</span>            <span class="keywordflow">return</span> j;</div>
<div class="line"><a id="l00057" name="l00057"></a><span class="lineno">   57</span>    }</div>
<div class="line"><a id="l00058" name="l00058"></a><span class="lineno">   58</span>    <span class="keywordflow">if</span> (j &lt; len)</div>
<div class="line"><a id="l00059" name="l00059"></a><span class="lineno">   59</span>        <span class="keywordflow">return</span> 0;</div>
<div class="line"><a id="l00060" name="l00060"></a><span class="lineno">   60</span>    *u = udecoded;</div>
<div class="line"><a id="l00061" name="l00061"></a><span class="lineno">   61</span>    nk_utf_validate(u, len);</div>
<div class="line"><a id="l00062" name="l00062"></a><span class="lineno">   62</span>    <span class="keywordflow">return</span> len;</div>
<div class="line"><a id="l00063" name="l00063"></a><span class="lineno">   63</span>}</div>
<div class="line"><a id="l00064" name="l00064"></a><span class="lineno">   64</span>NK_INTERN <span class="keywordtype">char</span></div>
<div class="line"><a id="l00065" name="l00065"></a><span class="lineno">   65</span>nk_utf_encode_byte(nk_rune u, <span class="keywordtype">int</span> i)</div>
<div class="line"><a id="l00066" name="l00066"></a><span class="lineno">   66</span>{</div>
<div class="line"><a id="l00067" name="l00067"></a><span class="lineno">   67</span>    <span class="keywordflow">return</span> (<span class="keywordtype">char</span>)((nk_utfbyte[i]) | ((nk_byte)u &amp; ~nk_utfmask[i]));</div>
<div class="line"><a id="l00068" name="l00068"></a><span class="lineno">   68</span>}</div>
<div class="line"><a id="l00069" name="l00069"></a><span class="lineno">   69</span>NK_API <span class="keywordtype">int</span></div>
<div class="line"><a id="l00070" name="l00070"></a><span class="lineno">   70</span>nk_utf_encode(nk_rune u, <span class="keywordtype">char</span> *c, <span class="keywordtype">int</span> clen)</div>
<div class="line"><a id="l00071" name="l00071"></a><span class="lineno">   71</span>{</div>
<div class="line"><a id="l00072" name="l00072"></a><span class="lineno">   72</span>    <span class="keywordtype">int</span> len, i;</div>
<div class="line"><a id="l00073" name="l00073"></a><span class="lineno">   73</span>    len = nk_utf_validate(&amp;u, 0);</div>
<div class="line"><a id="l00074" name="l00074"></a><span class="lineno">   74</span>    <span class="keywordflow">if</span> (clen &lt; len || !len || len &gt; <a class="code hl_define" href="nuklear_8h.html#a5751d22e6e68d2bf104010d6422bd28e">NK_UTF_SIZE</a>)</div>
<div class="line"><a id="l00075" name="l00075"></a><span class="lineno">   75</span>        <span class="keywordflow">return</span> 0;</div>
<div class="line"><a id="l00076" name="l00076"></a><span class="lineno">   76</span> </div>
<div class="line"><a id="l00077" name="l00077"></a><span class="lineno">   77</span>    <span class="keywordflow">for</span> (i = len - 1; i != 0; --i) {</div>
<div class="line"><a id="l00078" name="l00078"></a><span class="lineno">   78</span>        c[i] = nk_utf_encode_byte(u, 0);</div>
<div class="line"><a id="l00079" name="l00079"></a><span class="lineno">   79</span>        u &gt;&gt;= 6;</div>
<div class="line"><a id="l00080" name="l00080"></a><span class="lineno">   80</span>    }</div>
<div class="line"><a id="l00081" name="l00081"></a><span class="lineno">   81</span>    c[0] = nk_utf_encode_byte(u, len);</div>
<div class="line"><a id="l00082" name="l00082"></a><span class="lineno">   82</span>    <span class="keywordflow">return</span> len;</div>
<div class="line"><a id="l00083" name="l00083"></a><span class="lineno">   83</span>}</div>
<div class="line"><a id="l00084" name="l00084"></a><span class="lineno">   84</span>NK_API <span class="keywordtype">int</span></div>
<div class="line"><a id="l00085" name="l00085"></a><span class="lineno">   85</span>nk_utf_len(<span class="keyword">const</span> <span class="keywordtype">char</span> *str, <span class="keywordtype">int</span> len)</div>
<div class="line"><a id="l00086" name="l00086"></a><span class="lineno">   86</span>{</div>
<div class="line"><a id="l00087" name="l00087"></a><span class="lineno">   87</span>    <span class="keyword">const</span> <span class="keywordtype">char</span> *text;</div>
<div class="line"><a id="l00088" name="l00088"></a><span class="lineno">   88</span>    <span class="keywordtype">int</span> glyphs = 0;</div>
<div class="line"><a id="l00089" name="l00089"></a><span class="lineno">   89</span>    <span class="keywordtype">int</span> text_len;</div>
<div class="line"><a id="l00090" name="l00090"></a><span class="lineno">   90</span>    <span class="keywordtype">int</span> glyph_len;</div>
<div class="line"><a id="l00091" name="l00091"></a><span class="lineno">   91</span>    <span class="keywordtype">int</span> src_len = 0;</div>
<div class="line"><a id="l00092" name="l00092"></a><span class="lineno">   92</span>    nk_rune unicode;</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>    NK_ASSERT(str);</div>
<div class="line"><a id="l00095" name="l00095"></a><span class="lineno">   95</span>    <span class="keywordflow">if</span> (!str || !len) <span class="keywordflow">return</span> 0;</div>
<div class="line"><a id="l00096" name="l00096"></a><span class="lineno">   96</span> </div>
<div class="line"><a id="l00097" name="l00097"></a><span class="lineno">   97</span>    text = str;</div>
<div class="line"><a id="l00098" name="l00098"></a><span class="lineno">   98</span>    text_len = len;</div>
<div class="line"><a id="l00099" name="l00099"></a><span class="lineno">   99</span>    glyph_len = nk_utf_decode(text, &amp;unicode, text_len);</div>
<div class="line"><a id="l00100" name="l00100"></a><span class="lineno">  100</span>    <span class="keywordflow">while</span> (glyph_len &amp;&amp; src_len &lt; len) {</div>
<div class="line"><a id="l00101" name="l00101"></a><span class="lineno">  101</span>        glyphs++;</div>
<div class="line"><a id="l00102" name="l00102"></a><span class="lineno">  102</span>        src_len = src_len + glyph_len;</div>
<div class="line"><a id="l00103" name="l00103"></a><span class="lineno">  103</span>        glyph_len = nk_utf_decode(text + src_len, &amp;unicode, text_len - src_len);</div>
<div class="line"><a id="l00104" name="l00104"></a><span class="lineno">  104</span>    }</div>
<div class="line"><a id="l00105" name="l00105"></a><span class="lineno">  105</span>    <span class="keywordflow">return</span> glyphs;</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>NK_API <span class="keyword">const</span> <span class="keywordtype">char</span>*</div>
<div class="line"><a id="l00108" name="l00108"></a><span class="lineno">  108</span>nk_utf_at(<span class="keyword">const</span> <span class="keywordtype">char</span> *buffer, <span class="keywordtype">int</span> length, <span class="keywordtype">int</span> index,</div>
<div class="line"><a id="l00109" name="l00109"></a><span class="lineno">  109</span>    nk_rune *unicode, <span class="keywordtype">int</span> *len)</div>
<div class="line"><a id="l00110" name="l00110"></a><span class="lineno">  110</span>{</div>
<div class="line"><a id="l00111" name="l00111"></a><span class="lineno">  111</span>    <span class="keywordtype">int</span> i = 0;</div>
<div class="line"><a id="l00112" name="l00112"></a><span class="lineno">  112</span>    <span class="keywordtype">int</span> src_len = 0;</div>
<div class="line"><a id="l00113" name="l00113"></a><span class="lineno">  113</span>    <span class="keywordtype">int</span> glyph_len = 0;</div>
<div class="line"><a id="l00114" name="l00114"></a><span class="lineno">  114</span>    <span class="keyword">const</span> <span class="keywordtype">char</span> *text;</div>
<div class="line"><a id="l00115" name="l00115"></a><span class="lineno">  115</span>    <span class="keywordtype">int</span> text_len;</div>
<div class="line"><a id="l00116" name="l00116"></a><span class="lineno">  116</span> </div>
<div class="line"><a id="l00117" name="l00117"></a><span class="lineno">  117</span>    NK_ASSERT(buffer);</div>
<div class="line"><a id="l00118" name="l00118"></a><span class="lineno">  118</span>    NK_ASSERT(unicode);</div>
<div class="line"><a id="l00119" name="l00119"></a><span class="lineno">  119</span>    NK_ASSERT(len);</div>
<div class="line"><a id="l00120" name="l00120"></a><span class="lineno">  120</span> </div>
<div class="line"><a id="l00121" name="l00121"></a><span class="lineno">  121</span>    <span class="keywordflow">if</span> (!buffer || !unicode || !len) <span class="keywordflow">return</span> 0;</div>
<div class="line"><a id="l00122" name="l00122"></a><span class="lineno">  122</span>    <span class="keywordflow">if</span> (index &lt; 0) {</div>
<div class="line"><a id="l00123" name="l00123"></a><span class="lineno">  123</span>        *unicode = <a class="code hl_define" href="nuklear_8h.html#a3d052e6e91b71a1837356c6f8bebb1a6">NK_UTF_INVALID</a>;</div>
<div class="line"><a id="l00124" name="l00124"></a><span class="lineno">  124</span>        *len = 0;</div>
<div class="line"><a id="l00125" name="l00125"></a><span class="lineno">  125</span>        <span class="keywordflow">return</span> 0;</div>
<div class="line"><a id="l00126" name="l00126"></a><span class="lineno">  126</span>    }</div>
<div class="line"><a id="l00127" name="l00127"></a><span class="lineno">  127</span> </div>
<div class="line"><a id="l00128" name="l00128"></a><span class="lineno">  128</span>    text = buffer;</div>
<div class="line"><a id="l00129" name="l00129"></a><span class="lineno">  129</span>    text_len = length;</div>
<div class="line"><a id="l00130" name="l00130"></a><span class="lineno">  130</span>    glyph_len = nk_utf_decode(text, unicode, text_len);</div>
<div class="line"><a id="l00131" name="l00131"></a><span class="lineno">  131</span>    <span class="keywordflow">while</span> (glyph_len) {</div>
<div class="line"><a id="l00132" name="l00132"></a><span class="lineno">  132</span>        <span class="keywordflow">if</span> (i == index) {</div>
<div class="line"><a id="l00133" name="l00133"></a><span class="lineno">  133</span>            *len = glyph_len;</div>
<div class="line"><a id="l00134" name="l00134"></a><span class="lineno">  134</span>            <span class="keywordflow">break</span>;</div>
<div class="line"><a id="l00135" name="l00135"></a><span class="lineno">  135</span>        }</div>
<div class="line"><a id="l00136" name="l00136"></a><span class="lineno">  136</span> </div>
<div class="line"><a id="l00137" name="l00137"></a><span class="lineno">  137</span>        i++;</div>
<div class="line"><a id="l00138" name="l00138"></a><span class="lineno">  138</span>        src_len = src_len + glyph_len;</div>
<div class="line"><a id="l00139" name="l00139"></a><span class="lineno">  139</span>        glyph_len = nk_utf_decode(text + src_len, unicode, text_len - src_len);</div>
<div class="line"><a id="l00140" name="l00140"></a><span class="lineno">  140</span>    }</div>
<div class="line"><a id="l00141" name="l00141"></a><span class="lineno">  141</span>    <span class="keywordflow">if</span> (i != index) <span class="keywordflow">return</span> 0;</div>
<div class="line"><a id="l00142" name="l00142"></a><span class="lineno">  142</span>    <span class="keywordflow">return</span> buffer + src_len;</div>
<div class="line"><a id="l00143" name="l00143"></a><span class="lineno">  143</span>}</div>
<div class="line"><a id="l00144" name="l00144"></a><span class="lineno">  144</span> </div>
<div class="ttc" id="anuklear_8h_html"><div class="ttname"><a href="nuklear_8h.html">nuklear.h</a></div><div class="ttdoc">main API and documentation file</div></div>
<div class="ttc" id="anuklear_8h_html_a3d052e6e91b71a1837356c6f8bebb1a6"><div class="ttname"><a href="nuklear_8h.html#a3d052e6e91b71a1837356c6f8bebb1a6">NK_UTF_INVALID</a></div><div class="ttdeci">#define NK_UTF_INVALID</div><div class="ttdoc">internal invalid utf8 rune</div><div class="ttdef"><b>Definition</b> <a href="nuklear_8h_source.html#l00021">nuklear.h:21</a></div></div>
<div class="ttc" id="anuklear_8h_html_a5751d22e6e68d2bf104010d6422bd28e"><div class="ttname"><a href="nuklear_8h.html#a5751d22e6e68d2bf104010d6422bd28e">NK_UTF_SIZE</a></div><div class="ttdeci">#define NK_UTF_SIZE</div><div class="ttdoc">describes the number of bytes a glyph consists of</div><div class="ttdef"><b>Definition</b> <a href="nuklear_8h_source.html#l00022">nuklear.h:22</a></div></div>
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