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<title>Data/HashMap/PopCount.hs</title>
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<pre><a name="line-1"></a><span class='hs-comment'>{-# LANGUAGE CPP, ForeignFunctionInterface #-}</span>
<a name="line-2"></a>
<a name="line-3"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>HashMap</span><span class='hs-varop'>.</span><span class='hs-conid'>PopCount</span>
<a name="line-4"></a> <span class='hs-layout'>(</span> <span class='hs-varid'>popCount</span>
<a name="line-5"></a> <span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-6"></a>
<a name="line-7"></a><span class='hs-cpp'>#if __GLASGOW_HASKELL__ >= 704</span>
<a name="line-8"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Bits</span> <span class='hs-layout'>(</span><span class='hs-varid'>popCount</span><span class='hs-layout'>)</span>
<a name="line-9"></a><span class='hs-cpp'>#else</span>
<a name="line-10"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Word</span> <span class='hs-layout'>(</span><span class='hs-conid'>Word</span><span class='hs-layout'>)</span>
<a name="line-11"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Foreign</span><span class='hs-varop'>.</span><span class='hs-conid'>C</span> <span class='hs-layout'>(</span><span class='hs-conid'>CUInt</span><span class='hs-layout'>)</span>
<a name="line-12"></a><span class='hs-cpp'>#endif</span>
<a name="line-13"></a>
<a name="line-14"></a><span class='hs-cpp'>#if __GLASGOW_HASKELL__ < 704</span>
<a name="line-15"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-keyword'>unsafe</span> <span class='hs-str'>"popc.h popcount"</span> <span class='hs-varid'>c_popcount</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CUInt</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>CUInt</span>
<a name="line-16"></a>
<a name="line-17"></a><a name="popCount"></a><span class='hs-definition'>popCount</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Word</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span>
<a name="line-18"></a><span class='hs-definition'>popCount</span> <span class='hs-varid'>w</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromIntegral</span> <span class='hs-layout'>(</span><span class='hs-varid'>c_popcount</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>w</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-19"></a><span class='hs-cpp'>#endif</span>
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