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<title>Blaze/ByteString/Builder/Internal/UncheckedShifts.hs</title>
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<pre><a name="line-1"></a><span class='hs-comment'>{-# LANGUAGE CPP, MagicHash, MonoPatBinds #-}</span>
<a name="line-2"></a><span class='hs-comment'>-- |</span>
<a name="line-3"></a><span class='hs-comment'>-- Module : Blaze.ByteString.Builder.Internal.UncheckedShifts</span>
<a name="line-4"></a><span class='hs-comment'>-- Copyright : (c) 2010 Simon Meier</span>
<a name="line-5"></a><span class='hs-comment'>--</span>
<a name="line-6"></a><span class='hs-comment'>-- Original serialization code from 'Data.Binary.Builder':</span>
<a name="line-7"></a><span class='hs-comment'>-- (c) Lennart Kolmodin, Ross Patterson</span>
<a name="line-8"></a><span class='hs-comment'>--</span>
<a name="line-9"></a><span class='hs-comment'>-- License : BSD3-style (see LICENSE)</span>
<a name="line-10"></a><span class='hs-comment'>-- </span>
<a name="line-11"></a><span class='hs-comment'>-- Maintainer : Simon Meier <iridcode@gmail.com></span>
<a name="line-12"></a><span class='hs-comment'>-- Stability : experimental</span>
<a name="line-13"></a><span class='hs-comment'>-- Portability : tested on GHC only</span>
<a name="line-14"></a><span class='hs-comment'>--</span>
<a name="line-15"></a><span class='hs-comment'>-- Utilty module defining unchecked shifts.</span>
<a name="line-16"></a><span class='hs-comment'>--</span>
<a name="line-17"></a><span class='hs-cpp'>#if defined(__GLASGOW_HASKELL__) && !defined(__HADDOCK__)</span>
<a name="line-18"></a><span class='hs-cpp'>#include "MachDeps.h"</span>
<a name="line-19"></a><span class='hs-cpp'>#endif</span>
<a name="line-20"></a>
<a name="line-21"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>Blaze</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span><span class='hs-varop'>.</span><span class='hs-conid'>Builder</span><span class='hs-varop'>.</span><span class='hs-conid'>Internal</span><span class='hs-varop'>.</span><span class='hs-conid'>UncheckedShifts</span> <span class='hs-layout'>(</span>
<a name="line-22"></a> <span class='hs-varid'>shiftr_w16</span>
<a name="line-23"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>shiftr_w32</span>
<a name="line-24"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>shiftr_w64</span>
<a name="line-25"></a> <span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-26"></a>
<a name="line-27"></a><span class='hs-comment'>-- TODO: Check validity of this implementation</span>
<a name="line-28"></a>
<a name="line-29"></a><span class='hs-cpp'>#if defined(__GLASGOW_HASKELL__) && !defined(__HADDOCK__)</span>
<a name="line-30"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>GHC</span><span class='hs-varop'>.</span><span class='hs-conid'>Base</span>
<a name="line-31"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>GHC</span><span class='hs-varop'>.</span><span class='hs-conid'>Word</span> <span class='hs-layout'>(</span><span class='hs-conid'>Word32</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span><span class='hs-conid'>Word16</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span><span class='hs-conid'>Word64</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-32"></a>
<a name="line-33"></a><span class='hs-cpp'>#if WORD_SIZE_IN_BITS < 64 && __GLASGOW_HASKELL__ >= 608</span>
<a name="line-34"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>GHC</span><span class='hs-varop'>.</span><span class='hs-conid'>Word</span> <span class='hs-layout'>(</span><span class='hs-varid'>uncheckedShiftRL64</span><span class='hs-cpp'>#</span><span class='hs-layout'>)</span>
<a name="line-35"></a><span class='hs-cpp'>#endif</span>
<a name="line-36"></a><span class='hs-cpp'>#else</span>
<a name="line-37"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Word</span>
<a name="line-38"></a><span class='hs-cpp'>#endif</span>
<a name="line-39"></a>
<a name="line-40"></a>
<a name="line-41"></a><span class='hs-comment'>------------------------------------------------------------------------</span>
<a name="line-42"></a><span class='hs-comment'>-- Unchecked shifts</span>
<a name="line-43"></a>
<a name="line-44"></a><a name="shiftr_w16"></a><span class='hs-comment'>{-# INLINE shiftr_w16 #-}</span>
<a name="line-45"></a><span class='hs-definition'>shiftr_w16</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Word16</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Word16</span>
<a name="line-46"></a><a name="shiftr_w32"></a><span class='hs-comment'>{-# INLINE shiftr_w32 #-}</span>
<a name="line-47"></a><span class='hs-definition'>shiftr_w32</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Word32</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Word32</span>
<a name="line-48"></a><a name="shiftr_w64"></a><span class='hs-comment'>{-# INLINE shiftr_w64 #-}</span>
<a name="line-49"></a><span class='hs-definition'>shiftr_w64</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Word64</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Word64</span>
<a name="line-50"></a>
<a name="line-51"></a><span class='hs-cpp'>#if defined(__GLASGOW_HASKELL__) && !defined(__HADDOCK__)</span>
<a name="line-52"></a><span class='hs-definition'>shiftr_w16</span> <span class='hs-layout'>(</span><span class='hs-conid'>W16</span><span class='hs-cpp'>#</span> <span class='hs-varid'>w</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>I</span><span class='hs-cpp'>#</span> <span class='hs-varid'>i</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>W16</span><span class='hs-cpp'>#</span> <span class='hs-layout'>(</span><span class='hs-varid'>w</span> <span class='hs-varop'>`</span><span class='hs-varid'>uncheckedShiftRL</span><span class='hs-cpp'>#</span><span class='hs-varop'>`</span> <span class='hs-varid'>i</span><span class='hs-layout'>)</span>
<a name="line-53"></a><span class='hs-definition'>shiftr_w32</span> <span class='hs-layout'>(</span><span class='hs-conid'>W32</span><span class='hs-cpp'>#</span> <span class='hs-varid'>w</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>I</span><span class='hs-cpp'>#</span> <span class='hs-varid'>i</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>W32</span><span class='hs-cpp'>#</span> <span class='hs-layout'>(</span><span class='hs-varid'>w</span> <span class='hs-varop'>`</span><span class='hs-varid'>uncheckedShiftRL</span><span class='hs-cpp'>#</span><span class='hs-varop'>`</span> <span class='hs-varid'>i</span><span class='hs-layout'>)</span>
<a name="line-54"></a>
<a name="line-55"></a><span class='hs-cpp'>#if WORD_SIZE_IN_BITS < 64</span>
<a name="line-56"></a><span class='hs-definition'>shiftr_w64</span> <span class='hs-layout'>(</span><span class='hs-conid'>W64</span><span class='hs-cpp'>#</span> <span class='hs-varid'>w</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>I</span><span class='hs-cpp'>#</span> <span class='hs-varid'>i</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>W64</span><span class='hs-cpp'>#</span> <span class='hs-layout'>(</span><span class='hs-varid'>w</span> <span class='hs-varop'>`</span><span class='hs-varid'>uncheckedShiftRL64</span><span class='hs-cpp'>#</span><span class='hs-varop'>`</span> <span class='hs-varid'>i</span><span class='hs-layout'>)</span>
<a name="line-57"></a>
<a name="line-58"></a><span class='hs-cpp'>#if __GLASGOW_HASKELL__ <= 606</span>
<a name="line-59"></a><span class='hs-comment'>-- Exported by GHC.Word in GHC 6.8 and higher</span>
<a name="line-60"></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'>"stg_uncheckedShiftRL64"</span>
<a name="line-61"></a> <span class='hs-varid'>uncheckedShiftRL64</span><span class='hs-cpp'>#</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Word64</span><span class='hs-cpp'>#</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span><span class='hs-cpp'>#</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Word64</span><span class='hs-cpp'>#</span>
<a name="line-62"></a><span class='hs-cpp'>#endif</span>
<a name="line-63"></a>
<a name="line-64"></a><span class='hs-cpp'>#else</span>
<a name="line-65"></a><span class='hs-definition'>shiftr_w64</span> <span class='hs-layout'>(</span><span class='hs-conid'>W64</span><span class='hs-cpp'>#</span> <span class='hs-varid'>w</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>I</span><span class='hs-cpp'>#</span> <span class='hs-varid'>i</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>W64</span><span class='hs-cpp'>#</span> <span class='hs-layout'>(</span><span class='hs-varid'>w</span> <span class='hs-varop'>`</span><span class='hs-varid'>uncheckedShiftRL</span><span class='hs-cpp'>#</span><span class='hs-varop'>`</span> <span class='hs-varid'>i</span><span class='hs-layout'>)</span>
<a name="line-66"></a><span class='hs-cpp'>#endif</span>
<a name="line-67"></a>
<a name="line-68"></a><span class='hs-cpp'>#else</span>
<a name="line-69"></a><span class='hs-definition'>shiftr_w16</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>shiftR</span>
<a name="line-70"></a><span class='hs-definition'>shiftr_w32</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>shiftR</span>
<a name="line-71"></a><span class='hs-definition'>shiftr_w64</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>shiftR</span>
<a name="line-72"></a><span class='hs-cpp'>#endif</span>
<a name="line-73"></a>
</pre></body>
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