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<div class="title">NumericCast.hpp</div> </div>
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<a href="_numeric_cast_8hpp.xhtml">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">//</span></div><div class="line"><a name="l00002"></a><span class="lineno"> 2</span>&#160;<span class="comment">// Copyright © 2020 Arm Ltd. All rights reserved.</span></div><div class="line"><a name="l00003"></a><span class="lineno"> 3</span>&#160;<span class="comment">// SPDX-License-Identifier: MIT</span></div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span>&#160;<span class="comment">//</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">#pragma once</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="_assert_8hpp.xhtml">Assert.hpp</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="preprocessor">#include &lt;type_traits&gt;</span></div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span>&#160;<span class="preprocessor">#include &lt;limits&gt;</span></div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span>&#160;</div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span>&#160;<span class="keyword">namespace </span><a class="code" href="namespacearmnn.xhtml">armnn</a></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;</div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span>&#160;<span class="preprocessor">#if !defined(NDEBUG) || defined(ARMNN_NUMERIC_CAST_TESTABLE)</span></div><div class="line"><a name="l00017"></a><span class="lineno"><a class="line" href="_numeric_cast_8hpp.xhtml#a7465b0f72d0d82419828133449a89587"> 17</a></span>&#160;<span class="preprocessor">#define ENABLE_NUMERIC_CAST_CHECKS 1</span></div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span>&#160;<span class="preprocessor">#else</span></div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span>&#160;<span class="preprocessor">#define ENABLE_NUMERIC_CAST_CHECKS 0</span></div><div class="line"><a name="l00020"></a><span class="lineno"> 20</span>&#160;<span class="preprocessor">#endif</span></div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span>&#160;</div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span>&#160;<span class="preprocessor">#if defined(ARMNN_NUMERIC_CAST_TESTABLE)</span></div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span>&#160;<span class="preprocessor"># define ARMNN_NUMERIC_CAST_CHECK(cond, msg) ConditionalThrow&lt;std::bad_cast&gt;(cond)</span></div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span>&#160;<span class="preprocessor">#else</span></div><div class="line"><a name="l00025"></a><span class="lineno"><a class="line" href="_numeric_cast_8hpp.xhtml#a242e8e7e20f157c7301f4babcc120750"> 25</a></span>&#160;<span class="preprocessor"># define ARMNN_NUMERIC_CAST_CHECK(cond, msg) ARMNN_ASSERT_MSG(cond, msg)</span></div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span>&#160;<span class="preprocessor">#endif</span></div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span>&#160;</div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span>&#160;<span class="keyword">template</span>&lt;<span class="keyword">typename</span> Dest, <span class="keyword">typename</span> Source&gt;</div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span>&#160;<span class="keyword">typename</span> std::enable_if_t&lt;</div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span>&#160; std::is_unsigned&lt;Source&gt;::value &amp;&amp;</div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span>&#160; std::is_unsigned&lt;Dest&gt;::value</div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span>&#160; , Dest&gt;</div><div class="line"><a name="l00033"></a><span class="lineno"><a class="line" href="namespacearmnn.xhtml#a37fa39012e90d568df7f774cd6d1e956"> 33</a></span>&#160;<a class="code" href="namespacearmnn.xhtml#a37fa39012e90d568df7f774cd6d1e956">numeric_cast</a>(Source source)</div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span>&#160;{</div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span>&#160;<span class="preprocessor">#if ENABLE_NUMERIC_CAST_CHECKS</span></div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span>&#160; <span class="keywordflow">if</span> (source &gt; std::numeric_limits&lt;Dest&gt;::max())</div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span>&#160; {</div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span>&#160; <a class="code" href="_numeric_cast_8hpp.xhtml#a242e8e7e20f157c7301f4babcc120750">ARMNN_NUMERIC_CAST_CHECK</a>(<span class="keyword">false</span>, <span class="stringliteral">&quot;numeric_cast failed casting unsigned type to &quot;</span></div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span>&#160; <span class="stringliteral">&quot;narrower unsigned type. Overflow detected.&quot;</span>);</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;<span class="preprocessor">#endif // ENABLE_NUMERIC_CAST_CHECKS</span></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">return</span> <span class="keyword">static_cast&lt;</span>Dest<span class="keyword">&gt;</span>(source);</div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span>&#160;}</div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span>&#160;</div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span>&#160;<span class="keyword">template</span>&lt;<span class="keyword">typename</span> Dest, <span class="keyword">typename</span> Source&gt;</div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span>&#160;<span class="keyword">typename</span> std::enable_if_t&lt;</div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span>&#160; std::is_signed&lt;Source&gt;::value &amp;&amp;</div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span>&#160; std::is_signed&lt;Dest&gt;::value</div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span>&#160; , Dest&gt;</div><div class="line"><a name="l00051"></a><span class="lineno"><a class="line" href="namespacearmnn.xhtml#ad6ffcdfab3ded108070933bf4cee52a0"> 51</a></span>&#160;<a class="code" href="namespacearmnn.xhtml#a37fa39012e90d568df7f774cd6d1e956">numeric_cast</a>(Source source)</div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span>&#160;{</div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span>&#160; static_assert(!std::is_floating_point&lt;Source&gt;::value &amp;&amp; !std::is_floating_point&lt;Dest&gt;::value,</div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span>&#160; <span class="stringliteral">&quot;numeric_cast doesn&#39;t cast float.&quot;</span>);</div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span>&#160;</div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span>&#160;<span class="preprocessor">#if ENABLE_NUMERIC_CAST_CHECKS</span></div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span>&#160; <span class="keywordflow">if</span> (source &gt; std::numeric_limits&lt;Dest&gt;::max())</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; <a class="code" href="_numeric_cast_8hpp.xhtml#a242e8e7e20f157c7301f4babcc120750">ARMNN_NUMERIC_CAST_CHECK</a>(<span class="keyword">false</span>, <span class="stringliteral">&quot;numeric_cast failed casting signed type to narrower signed type. &quot;</span></div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span>&#160; <span class="stringliteral">&quot;Overflow detected.&quot;</span>);</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;</div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span>&#160; <span class="keywordflow">if</span> (source &lt; std::numeric_limits&lt;Dest&gt;::lowest())</div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span>&#160; {</div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span>&#160; <a class="code" href="_numeric_cast_8hpp.xhtml#a242e8e7e20f157c7301f4babcc120750">ARMNN_NUMERIC_CAST_CHECK</a>(<span class="keyword">false</span>, <span class="stringliteral">&quot;numeric_cast failed casting signed type to narrower signed type. &quot;</span></div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span>&#160; <span class="stringliteral">&quot;Underflow detected.&quot;</span>);</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="preprocessor">#endif // ENABLE_NUMERIC_CAST_CHECKS</span></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; <span class="keywordflow">return</span> <span class="keyword">static_cast&lt;</span>Dest<span class="keyword">&gt;</span>(source);</div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span>&#160;}</div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span>&#160;</div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span>&#160;<span class="comment">// numeric cast from unsigned to signed checked for narrowing overflows</span></div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span>&#160;<span class="keyword">template</span>&lt;<span class="keyword">typename</span> Dest, <span class="keyword">typename</span> Source&gt;</div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span>&#160;<span class="keyword">typename</span> std::enable_if_t&lt;</div><div class="line"><a name="l00076"></a><span class="lineno"> 76</span>&#160; std::is_signed&lt;Dest&gt;::value &amp;&amp;</div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span>&#160; std::is_unsigned&lt;Source&gt;::value</div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span>&#160; , Dest&gt;</div><div class="line"><a name="l00079"></a><span class="lineno"><a class="line" href="namespacearmnn.xhtml#ae3db25ec960ff865f0ed144dc018e61e"> 79</a></span>&#160;<a class="code" href="namespacearmnn.xhtml#a37fa39012e90d568df7f774cd6d1e956">numeric_cast</a>(Source sValue)</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; static_assert(!std::is_floating_point&lt;Dest&gt;::value, <span class="stringliteral">&quot;numeric_cast doesn&#39;t cast to float.&quot;</span>);</div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span>&#160;</div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span>&#160;<span class="preprocessor">#if ENABLE_NUMERIC_CAST_CHECKS</span></div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span>&#160; <span class="keywordflow">if</span> (sValue &gt; <span class="keyword">static_cast&lt;</span> typename std::make_unsigned&lt;Dest&gt;::type <span class="keyword">&gt;</span>(std::numeric_limits&lt;Dest&gt;::max()))</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; <a class="code" href="_numeric_cast_8hpp.xhtml#a242e8e7e20f157c7301f4babcc120750">ARMNN_NUMERIC_CAST_CHECK</a>(<span class="keyword">false</span>, <span class="stringliteral">&quot;numeric_cast failed casting unsigned type to signed type. &quot;</span></div><div class="line"><a name="l00087"></a><span class="lineno"> 87</span>&#160; <span class="stringliteral">&quot;Overflow detected.&quot;</span>);</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="preprocessor">#endif // ENABLE_NUMERIC_CAST_CHECKS</span></div><div class="line"><a name="l00090"></a><span class="lineno"> 90</span>&#160;</div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span>&#160; <span class="keywordflow">return</span> <span class="keyword">static_cast&lt;</span>Dest<span class="keyword">&gt;</span>(sValue);</div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span>&#160;}</div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span>&#160;</div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span>&#160;<span class="comment">// numeric cast from signed to unsigned checked for underflows and narrowing overflows</span></div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span>&#160;<span class="keyword">template</span>&lt;<span class="keyword">typename</span> Dest, <span class="keyword">typename</span> Source&gt;</div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span>&#160;<span class="keyword">typename</span> std::enable_if_t&lt;</div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span>&#160; std::is_unsigned&lt;Dest&gt;::value &amp;&amp;</div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span>&#160; std::is_signed&lt;Source&gt;::value</div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span>&#160; , Dest&gt;</div><div class="line"><a name="l00100"></a><span class="lineno"><a class="line" href="namespacearmnn.xhtml#a0071d5c83ebd2132118af70b1f3a539a"> 100</a></span>&#160;<a class="code" href="namespacearmnn.xhtml#a37fa39012e90d568df7f774cd6d1e956">numeric_cast</a>(Source sValue)</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; static_assert(!std::is_floating_point&lt;Source&gt;::value &amp;&amp; !std::is_floating_point&lt;Dest&gt;::value,</div><div class="line"><a name="l00103"></a><span class="lineno"> 103</span>&#160; <span class="stringliteral">&quot;numeric_cast doesn&#39;t cast floats.&quot;</span>);</div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span>&#160;</div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span>&#160;<span class="preprocessor">#if ENABLE_NUMERIC_CAST_CHECKS</span></div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span>&#160; <span class="keywordflow">if</span> (sValue &lt; 0)</div><div class="line"><a name="l00107"></a><span class="lineno"> 107</span>&#160; {</div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span>&#160; <a class="code" href="_numeric_cast_8hpp.xhtml#a242e8e7e20f157c7301f4babcc120750">ARMNN_NUMERIC_CAST_CHECK</a>(<span class="keyword">false</span>, <span class="stringliteral">&quot;numeric_cast failed casting negative value to unsigned type. &quot;</span></div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span>&#160; <span class="stringliteral">&quot;Underflow detected.&quot;</span>);</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;</div><div class="line"><a name="l00112"></a><span class="lineno"> 112</span>&#160; <span class="keywordflow">if</span> (<span class="keyword">static_cast&lt;</span> typename std::make_unsigned&lt;Source&gt;::type <span class="keyword">&gt;</span>(sValue) &gt; std::numeric_limits&lt;Dest&gt;::max())</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; <a class="code" href="_numeric_cast_8hpp.xhtml#a242e8e7e20f157c7301f4babcc120750">ARMNN_NUMERIC_CAST_CHECK</a>(<span class="keyword">false</span>, <span class="stringliteral">&quot;numeric_cast failed casting signed type to unsigned type. &quot;</span></div><div class="line"><a name="l00115"></a><span class="lineno"> 115</span>&#160; <span class="stringliteral">&quot;Overflow detected.&quot;</span>);</div><div class="line"><a name="l00116"></a><span class="lineno"> 116</span>&#160; }</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;<span class="preprocessor">#endif // ENABLE_NUMERIC_CAST_CHECKS</span></div><div class="line"><a name="l00119"></a><span class="lineno"> 119</span>&#160; <span class="keywordflow">return</span> <span class="keyword">static_cast&lt;</span>Dest<span class="keyword">&gt;</span>(sValue);</div><div class="line"><a name="l00120"></a><span class="lineno"> 120</span>&#160;}</div><div class="line"><a name="l00121"></a><span class="lineno"> 121</span>&#160;</div><div class="line"><a name="l00122"></a><span class="lineno"> 122</span>&#160;<span class="preprocessor">#undef ENABLE_NUMERIC_CAST_CHECKS</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="comment">//namespace armnn</span></div><div class="ttc" id="namespacearmnn_xhtml"><div class="ttname"><a href="namespacearmnn.xhtml">armnn</a></div><div class="ttdoc">Copyright (c) 2020 ARM Limited. </div><div class="ttdef"><b>Definition:</b> <a href="00__introduction_8dox_source.xhtml#l00025">00_introduction.dox:25</a></div></div>
<div class="ttc" id="_numeric_cast_8hpp_xhtml_a242e8e7e20f157c7301f4babcc120750"><div class="ttname"><a href="_numeric_cast_8hpp.xhtml#a242e8e7e20f157c7301f4babcc120750">ARMNN_NUMERIC_CAST_CHECK</a></div><div class="ttdeci">#define ARMNN_NUMERIC_CAST_CHECK(cond, msg)</div><div class="ttdef"><b>Definition:</b> <a href="_numeric_cast_8hpp_source.xhtml#l00025">NumericCast.hpp:25</a></div></div>
<div class="ttc" id="namespacearmnn_xhtml_a37fa39012e90d568df7f774cd6d1e956"><div class="ttname"><a href="namespacearmnn.xhtml#a37fa39012e90d568df7f774cd6d1e956">armnn::numeric_cast</a></div><div class="ttdeci">std::enable_if_t&lt; std::is_unsigned&lt; Source &gt;::value &amp;&amp;std::is_unsigned&lt; Dest &gt;::value, Dest &gt; numeric_cast(Source source)</div><div class="ttdef"><b>Definition:</b> <a href="_numeric_cast_8hpp_source.xhtml#l00033">NumericCast.hpp:33</a></div></div>
<div class="ttc" id="_assert_8hpp_xhtml"><div class="ttname"><a href="_assert_8hpp.xhtml">Assert.hpp</a></div></div>
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