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<title>dist-ghc/build/System/Random/Mersenne/Pure64/Base.hs</title>
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<pre><a name="line-1"></a><span class='hs-comment'>{-# LINE 1 "System/Random/Mersenne/Pure64/Base.hsc" #-}</span>
<a name="line-2"></a><span class='hs-comment'>{-# LANGUAGE EmptyDataDecls, CPP, ForeignFunctionInterface #-}</span>
<a name="line-3"></a><span class='hs-comment'>{-# LINE 2 "System/Random/Mersenne/Pure64/Base.hsc" #-}</span>
<a name="line-4"></a><span class='hs-comment'>--------------------------------------------------------------------</span>
<a name="line-5"></a><span class='hs-comment'>-- |</span>
<a name="line-6"></a><span class='hs-comment'>-- Module : System.Random.Mersenne.Pure64.Base</span>
<a name="line-7"></a><span class='hs-comment'>-- Copyright : Copyright (c) 2008, Don Stewart <dons@galois.com></span>
<a name="line-8"></a><span class='hs-comment'>-- License : BSD3</span>
<a name="line-9"></a><span class='hs-comment'>-- Maintainer : Don Stewart <dons@galois.com></span>
<a name="line-10"></a><span class='hs-comment'>-- Stability : experimental</span>
<a name="line-11"></a><span class='hs-comment'>-- Portability: CPP, FFI, EmptyDataDecls</span>
<a name="line-12"></a><span class='hs-comment'>-- Tested with: GHC 6.8.3</span>
<a name="line-13"></a><span class='hs-comment'>--</span>
<a name="line-14"></a><span class='hs-comment'>-- A purely functional binding 64 bit binding to the classic mersenne</span>
<a name="line-15"></a><span class='hs-comment'>-- twister random number generator. This is more flexible than the</span>
<a name="line-16"></a><span class='hs-comment'>-- impure 'mersenne-random' library, at the cost of being a bit slower.</span>
<a name="line-17"></a><span class='hs-comment'>-- This generator is however, many times faster than System.Random,</span>
<a name="line-18"></a><span class='hs-comment'>-- and yields high quality randoms with a long period.</span>
<a name="line-19"></a><span class='hs-comment'>--</span>
<a name="line-20"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>Random</span><span class='hs-varop'>.</span><span class='hs-conid'>Mersenne</span><span class='hs-varop'>.</span><span class='hs-conid'>Pure64</span><span class='hs-varop'>.</span><span class='hs-conid'>Base</span> <span class='hs-keyword'>where</span>
<a name="line-21"></a>
<a name="line-22"></a>
<a name="line-23"></a><span class='hs-comment'>{-# LINE 21 "System/Random/Mersenne/Pure64/Base.hsc" #-}</span>
<a name="line-24"></a>
<a name="line-25"></a><span class='hs-comment'>{-# LINE 22 "System/Random/Mersenne/Pure64/Base.hsc" #-}</span>
<a name="line-26"></a>
<a name="line-27"></a><span class='hs-comment'>{-# LINE 23 "System/Random/Mersenne/Pure64/Base.hsc" #-}</span>
<a name="line-28"></a>
<a name="line-29"></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-varop'>.</span><span class='hs-conid'>Types</span>
<a name="line-30"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Foreign</span>
<a name="line-31"></a>
<a name="line-32"></a><a name="MTState"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>MTState</span>
<a name="line-33"></a>
<a name="line-34"></a><a name="UInt64"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>UInt64</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>CULLong</span>
<a name="line-35"></a>
<a name="line-36"></a><span class='hs-comment'>------------------------------------------------------------------------</span>
<a name="line-37"></a><span class='hs-comment'>-- pure version:</span>
<a name="line-38"></a>
<a name="line-39"></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'>"init_genrand64"</span>
<a name="line-40"></a> <span class='hs-varid'>c_init_genrand64</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>MTState</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>UInt64</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-41"></a>
<a name="line-42"></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'>"genrand64_int64"</span>
<a name="line-43"></a> <span class='hs-varid'>c_genrand64_int64</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>MTState</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>UInt64</span>
<a name="line-44"></a>
<a name="line-45"></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'>"genrand64_real2"</span>
<a name="line-46"></a> <span class='hs-varid'>c_genrand64_real2</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>MTState</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>CDouble</span>
<a name="line-47"></a>
<a name="line-48"></a><a name="sizeof_MTState"></a><span class='hs-definition'>sizeof_MTState</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int</span>
<a name="line-49"></a><span class='hs-definition'>sizeof_MTState</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-num'>2504</span><span class='hs-layout'>)</span> <span class='hs-comment'>-- 2504 bytes</span>
<a name="line-50"></a><span class='hs-comment'>{-# LINE 45 "System/Random/Mersenne/Pure64/Base.hsc" #-}</span>
<a name="line-51"></a>
<a name="line-52"></a><span class='hs-comment'>------------------------------------------------------------------------</span>
<a name="line-53"></a><span class='hs-comment'>-- block based version:</span>
<a name="line-54"></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'>"mix_bits"</span>
<a name="line-55"></a> <span class='hs-varid'>c_mix_word64</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Word64</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Word64</span>
<a name="line-56"></a>
<a name="line-57"></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'>"seed_genrand64_block"</span>
<a name="line-58"></a> <span class='hs-varid'>c_seed_genrand64_block</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Ptr</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Word64</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-59"></a>
<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'>"next_genrand64_block"</span>
<a name="line-61"></a> <span class='hs-varid'>c_next_genrand64_block</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Ptr</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ptr</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-62"></a>
<a name="line-63"></a><a name="blockLen"></a><span class='hs-comment'>-- | length of an MT block</span>
<a name="line-64"></a><span class='hs-definition'>blockLen</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int</span>
<a name="line-65"></a><span class='hs-definition'>blockLen</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-num'>312</span><span class='hs-layout'>)</span>
<a name="line-66"></a><span class='hs-comment'>{-# LINE 60 "System/Random/Mersenne/Pure64/Base.hsc" #-}</span>
<a name="line-67"></a>
<a name="line-68"></a><a name="blockSize"></a><span class='hs-comment'>-- | size of an MT block, in bytes</span>
<a name="line-69"></a><span class='hs-definition'>blockSize</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int</span>
<a name="line-70"></a><span class='hs-definition'>blockSize</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-num'>2496</span><span class='hs-layout'>)</span>
<a name="line-71"></a><span class='hs-comment'>{-# LINE 64 "System/Random/Mersenne/Pure64/Base.hsc" #-}</span>
<a name="line-72"></a>
<a name="line-73"></a><span class='hs-comment'>------------------------------------------------------------------------</span>
<a name="line-74"></a><span class='hs-comment'>-- model: (for testing purposes)</span>
<a name="line-75"></a>
<a name="line-76"></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'>"init_genrand64_unsafe"</span>
<a name="line-77"></a> <span class='hs-varid'>c_init_genrand64_unsafe</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>UInt64</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-78"></a>
<a name="line-79"></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'>"genrand64_int64_unsafe"</span>
<a name="line-80"></a> <span class='hs-varid'>c_genrand64_int64_unsafe</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>UInt64</span>
<a name="line-81"></a>
<a name="line-82"></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'>"genrand64_real2_unsafe"</span>
<a name="line-83"></a> <span class='hs-varid'>c_genrand64_real2_unsafe</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>CDouble</span>
<a name="line-84"></a>
<a name="line-85"></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'>"string.h memcpy"</span>
<a name="line-86"></a> <span class='hs-varid'>c_memcpy</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>Word8</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>Word8</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>CSize</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>Word8</span><span class='hs-layout'>)</span>
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