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<title>System/Event/Array.hs</title>
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<pre><a name="line-1"></a><span class='hs-comment'>{-# LANGUAGE BangPatterns, CPP, ForeignFunctionInterface, NoImplicitPrelude #-}</span>
<a name="line-2"></a>
<a name="line-3"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>Event</span><span class='hs-varop'>.</span><span class='hs-conid'>Array</span>
<a name="line-4"></a> <span class='hs-layout'>(</span>
<a name="line-5"></a> <span class='hs-conid'>Array</span>
<a name="line-6"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>capacity</span>
<a name="line-7"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>clear</span>
<a name="line-8"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>concat</span>
<a name="line-9"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>copy</span>
<a name="line-10"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>duplicate</span>
<a name="line-11"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>empty</span>
<a name="line-12"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>ensureCapacity</span>
<a name="line-13"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>findIndex</span>
<a name="line-14"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>forM_</span>
<a name="line-15"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>length</span>
<a name="line-16"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>loop</span>
<a name="line-17"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>new</span>
<a name="line-18"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>removeAt</span>
<a name="line-19"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>snoc</span>
<a name="line-20"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>unsafeLoad</span>
<a name="line-21"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>unsafeRead</span>
<a name="line-22"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>unsafeWrite</span>
<a name="line-23"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>useAsPtr</span>
<a name="line-24"></a> <span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-25"></a>
<a name="line-26"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Monad</span> <span class='hs-varid'>hiding</span> <span class='hs-layout'>(</span><span class='hs-varid'>forM_</span><span class='hs-layout'>)</span>
<a name="line-27"></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-layout'>(</span><span class='hs-varop'>.|.</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-varid'>shiftR</span><span class='hs-layout'>)</span>
<a name="line-28"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>IORef</span> <span class='hs-layout'>(</span><span class='hs-conid'>IORef</span><span class='hs-layout'>,</span> <span class='hs-varid'>atomicModifyIORef</span><span class='hs-layout'>,</span> <span class='hs-varid'>newIORef</span><span class='hs-layout'>,</span> <span class='hs-varid'>readIORef</span><span class='hs-layout'>,</span> <span class='hs-varid'>writeIORef</span><span class='hs-layout'>)</span>
<a name="line-29"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Maybe</span>
<a name="line-30"></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> <span class='hs-layout'>(</span><span class='hs-conid'>CSize</span><span class='hs-layout'>)</span>
<a name="line-31"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Foreign</span><span class='hs-varop'>.</span><span class='hs-conid'>ForeignPtr</span> <span class='hs-layout'>(</span><span class='hs-conid'>ForeignPtr</span><span class='hs-layout'>,</span> <span class='hs-varid'>withForeignPtr</span><span class='hs-layout'>)</span>
<a name="line-32"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Foreign</span><span class='hs-varop'>.</span><span class='hs-conid'>Ptr</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span><span class='hs-layout'>,</span> <span class='hs-varid'>nullPtr</span><span class='hs-layout'>,</span> <span class='hs-varid'>plusPtr</span><span class='hs-layout'>)</span>
<a name="line-33"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Foreign</span><span class='hs-varop'>.</span><span class='hs-conid'>Storable</span> <span class='hs-layout'>(</span><span class='hs-conid'>Storable</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>)</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'>Base</span>
<a name="line-35"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>GHC</span><span class='hs-varop'>.</span><span class='hs-conid'>Err</span> <span class='hs-layout'>(</span><span class='hs-varid'>undefined</span><span class='hs-layout'>)</span>
<a name="line-36"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>GHC</span><span class='hs-varop'>.</span><span class='hs-conid'>ForeignPtr</span> <span class='hs-layout'>(</span><span class='hs-varid'>mallocPlainForeignPtrBytes</span><span class='hs-layout'>,</span> <span class='hs-varid'>newForeignPtr_</span><span class='hs-layout'>)</span>
<a name="line-37"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>GHC</span><span class='hs-varop'>.</span><span class='hs-conid'>Num</span> <span class='hs-layout'>(</span><span class='hs-conid'>Num</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-38"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>GHC</span><span class='hs-varop'>.</span><span class='hs-conid'>Real</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span><span class='hs-layout'>)</span>
<a name="line-39"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>GHC</span><span class='hs-varop'>.</span><span class='hs-conid'>Show</span> <span class='hs-layout'>(</span><span class='hs-varid'>show</span><span class='hs-layout'>)</span>
<a name="line-40"></a>
<a name="line-41"></a><span class='hs-cpp'>#include "MachDeps.h"</span>
<a name="line-42"></a>
<a name="line-43"></a><span class='hs-cpp'>#define BOUNDS_CHECKING 1</span>
<a name="line-44"></a>
<a name="line-45"></a><span class='hs-cpp'>#if defined(BOUNDS_CHECKING)</span>
<a name="line-46"></a><span class='hs-comment'>-- This fugly hack is brought by GHC's apparent reluctance to deal</span>
<a name="line-47"></a><span class='hs-comment'>-- with MagicHash and UnboxedTuples when inferring types. Eek!</span>
<a name="line-48"></a><span class='hs-cpp'>#define CHECK_BOUNDS(_func_,_len_,_k_) \</span>
<a name="line-49"></a><span class='hs-keyword'>if</span> <span class='hs-layout'>(</span><span class='hs-sel'>_k_</span><span class='hs-layout'>)</span> <span class='hs-varop'><</span> <span class='hs-num'>0</span> <span class='hs-varop'>||</span> <span class='hs-layout'>(</span><span class='hs-sel'>_k_</span><span class='hs-layout'>)</span> <span class='hs-varop'>>=</span> <span class='hs-layout'>(</span><span class='hs-sel'>_len_</span><span class='hs-layout'>)</span> <span class='hs-keyword'>then</span> <span class='hs-varid'>error</span> <span class='hs-layout'>(</span><span class='hs-str'>"System.Event.Array."</span> <span class='hs-varop'>++</span> <span class='hs-layout'>(</span><span class='hs-sel'>_func_</span><span class='hs-layout'>)</span> <span class='hs-varop'>++</span> <span class='hs-str'>": bounds error, index "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>show</span> <span class='hs-layout'>(</span><span class='hs-sel'>_k_</span><span class='hs-layout'>)</span> <span class='hs-varop'>++</span> <span class='hs-str'>", capacity "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>show</span> <span class='hs-layout'>(</span><span class='hs-sel'>_len_</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyword'>else</span>
<a name="line-50"></a><span class='hs-cpp'>#else</span>
<a name="line-51"></a><span class='hs-cpp'>#define CHECK_BOUNDS(_func_,_len_,_k_)</span>
<a name="line-52"></a><span class='hs-cpp'>#endif</span>
<a name="line-53"></a>
<a name="line-54"></a><a name="Array"></a><span class='hs-comment'>-- Invariant: size <= capacity</span>
<a name="line-55"></a><a name="Array"></a><span class='hs-keyword'>newtype</span> <span class='hs-conid'>Array</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Array</span> <span class='hs-layout'>(</span><span class='hs-conid'>IORef</span> <span class='hs-layout'>(</span><span class='hs-conid'>AC</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-56"></a>
<a name="line-57"></a><a name="AC"></a><span class='hs-comment'>-- The actual array content.</span>
<a name="line-58"></a><a name="AC"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>AC</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>AC</span>
<a name="line-59"></a> <span class='hs-varop'>!</span><span class='hs-layout'>(</span><span class='hs-conid'>ForeignPtr</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-comment'>-- Elements</span>
<a name="line-60"></a> <span class='hs-varop'>!</span><span class='hs-conid'>Int</span> <span class='hs-comment'>-- Number of elements (length)</span>
<a name="line-61"></a> <span class='hs-varop'>!</span><span class='hs-conid'>Int</span> <span class='hs-comment'>-- Maximum number of elements (capacity)</span>
<a name="line-62"></a>
<a name="line-63"></a><a name="empty"></a><span class='hs-definition'>empty</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>Array</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-64"></a><span class='hs-definition'>empty</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-65"></a> <span class='hs-varid'>p</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>newForeignPtr_</span> <span class='hs-varid'>nullPtr</span>
<a name="line-66"></a> <span class='hs-conid'>Array</span> <span class='hs-varop'>`fmap`</span> <span class='hs-varid'>newIORef</span> <span class='hs-layout'>(</span><span class='hs-conid'>AC</span> <span class='hs-varid'>p</span> <span class='hs-num'>0</span> <span class='hs-num'>0</span><span class='hs-layout'>)</span>
<a name="line-67"></a>
<a name="line-68"></a><a name="allocArray"></a><span class='hs-definition'>allocArray</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Storable</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>ForeignPtr</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-69"></a><span class='hs-definition'>allocArray</span> <span class='hs-varid'>n</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>allocHack</span> <span class='hs-varid'>undefined</span>
<a name="line-70"></a> <span class='hs-keyword'>where</span>
<a name="line-71"></a> <span class='hs-varid'>allocHack</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Storable</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>ForeignPtr</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-72"></a> <span class='hs-varid'>allocHack</span> <span class='hs-varid'>dummy</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>mallocPlainForeignPtrBytes</span> <span class='hs-layout'>(</span><span class='hs-varid'>n</span> <span class='hs-varop'>*</span> <span class='hs-varid'>sizeOf</span> <span class='hs-varid'>dummy</span><span class='hs-layout'>)</span>
<a name="line-73"></a>
<a name="line-74"></a><a name="reallocArray"></a><span class='hs-definition'>reallocArray</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Storable</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>ForeignPtr</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>ForeignPtr</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-75"></a><span class='hs-definition'>reallocArray</span> <span class='hs-varid'>p</span> <span class='hs-varid'>newSize</span> <span class='hs-varid'>oldSize</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>reallocHack</span> <span class='hs-varid'>undefined</span> <span class='hs-varid'>p</span>
<a name="line-76"></a> <span class='hs-keyword'>where</span>
<a name="line-77"></a> <span class='hs-varid'>reallocHack</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Storable</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>ForeignPtr</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>ForeignPtr</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-78"></a> <span class='hs-varid'>reallocHack</span> <span class='hs-varid'>dummy</span> <span class='hs-varid'>src</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-79"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>size</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>sizeOf</span> <span class='hs-varid'>dummy</span>
<a name="line-80"></a> <span class='hs-varid'>dst</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>mallocPlainForeignPtrBytes</span> <span class='hs-layout'>(</span><span class='hs-varid'>newSize</span> <span class='hs-varop'>*</span> <span class='hs-varid'>size</span><span class='hs-layout'>)</span>
<a name="line-81"></a> <span class='hs-varid'>withForeignPtr</span> <span class='hs-varid'>src</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>s</span> <span class='hs-keyglyph'>-></span>
<a name="line-82"></a> <span class='hs-varid'>when</span> <span class='hs-layout'>(</span><span class='hs-varid'>s</span> <span class='hs-varop'>/=</span> <span class='hs-varid'>nullPtr</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>oldSize</span> <span class='hs-varop'>></span> <span class='hs-num'>0</span><span class='hs-layout'>)</span> <span class='hs-varop'>.</span>
<a name="line-83"></a> <span class='hs-varid'>withForeignPtr</span> <span class='hs-varid'>dst</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>d</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-84"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>memcpy</span> <span class='hs-varid'>d</span> <span class='hs-varid'>s</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-layout'>(</span><span class='hs-varid'>oldSize</span> <span class='hs-varop'>*</span> <span class='hs-varid'>size</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-85"></a> <span class='hs-varid'>return</span> <span class='hs-conid'>()</span>
<a name="line-86"></a> <span class='hs-varid'>return</span> <span class='hs-varid'>dst</span>
<a name="line-87"></a>
<a name="line-88"></a><a name="new"></a><span class='hs-definition'>new</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Storable</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>Array</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-89"></a><span class='hs-definition'>new</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-90"></a> <span class='hs-varid'>es</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>allocArray</span> <span class='hs-varid'>cap</span>
<a name="line-91"></a> <span class='hs-varid'>fmap</span> <span class='hs-conid'>Array</span> <span class='hs-layout'>(</span><span class='hs-varid'>newIORef</span> <span class='hs-layout'>(</span><span class='hs-conid'>AC</span> <span class='hs-varid'>es</span> <span class='hs-num'>0</span> <span class='hs-varid'>cap</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-92"></a> <span class='hs-keyword'>where</span>
<a name="line-93"></a> <span class='hs-varid'>cap</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>firstPowerOf2</span> <span class='hs-varid'>c</span>
<a name="line-94"></a>
<a name="line-95"></a><a name="duplicate"></a><span class='hs-definition'>duplicate</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Storable</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Array</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>Array</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-96"></a><span class='hs-definition'>duplicate</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>dupHack</span> <span class='hs-varid'>undefined</span> <span class='hs-varid'>a</span>
<a name="line-97"></a> <span class='hs-keyword'>where</span>
<a name="line-98"></a> <span class='hs-varid'>dupHack</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Storable</span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>=></span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Array</span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>Array</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span>
<a name="line-99"></a> <span class='hs-varid'>dupHack</span> <span class='hs-varid'>dummy</span> <span class='hs-layout'>(</span><span class='hs-conid'>Array</span> <span class='hs-varid'>ref</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-100"></a> <span class='hs-conid'>AC</span> <span class='hs-varid'>es</span> <span class='hs-varid'>len</span> <span class='hs-varid'>cap</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>readIORef</span> <span class='hs-varid'>ref</span>
<a name="line-101"></a> <span class='hs-varid'>ary</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>allocArray</span> <span class='hs-varid'>cap</span>
<a name="line-102"></a> <span class='hs-varid'>withForeignPtr</span> <span class='hs-varid'>ary</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>dest</span> <span class='hs-keyglyph'>-></span>
<a name="line-103"></a> <span class='hs-varid'>withForeignPtr</span> <span class='hs-varid'>es</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>src</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-104"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>memcpy</span> <span class='hs-varid'>dest</span> <span class='hs-varid'>src</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-layout'>(</span><span class='hs-varid'>len</span> <span class='hs-varop'>*</span> <span class='hs-varid'>sizeOf</span> <span class='hs-varid'>dummy</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-105"></a> <span class='hs-varid'>return</span> <span class='hs-conid'>()</span>
<a name="line-106"></a> <span class='hs-conid'>Array</span> <span class='hs-varop'>`fmap`</span> <span class='hs-varid'>newIORef</span> <span class='hs-layout'>(</span><span class='hs-conid'>AC</span> <span class='hs-varid'>ary</span> <span class='hs-varid'>len</span> <span class='hs-varid'>cap</span><span class='hs-layout'>)</span>
<a name="line-107"></a>
<a name="line-108"></a><a name="length"></a><span class='hs-definition'>length</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Array</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Int</span>
<a name="line-109"></a><span class='hs-definition'>length</span> <span class='hs-layout'>(</span><span class='hs-conid'>Array</span> <span class='hs-varid'>ref</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-110"></a> <span class='hs-conid'>AC</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>len</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>readIORef</span> <span class='hs-varid'>ref</span>
<a name="line-111"></a> <span class='hs-varid'>return</span> <span class='hs-varid'>len</span>
<a name="line-112"></a>
<a name="line-113"></a><a name="capacity"></a><span class='hs-definition'>capacity</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Array</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Int</span>
<a name="line-114"></a><span class='hs-definition'>capacity</span> <span class='hs-layout'>(</span><span class='hs-conid'>Array</span> <span class='hs-varid'>ref</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-115"></a> <span class='hs-conid'>AC</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>cap</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>readIORef</span> <span class='hs-varid'>ref</span>
<a name="line-116"></a> <span class='hs-varid'>return</span> <span class='hs-varid'>cap</span>
<a name="line-117"></a>
<a name="line-118"></a><a name="unsafeRead"></a><span class='hs-definition'>unsafeRead</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Storable</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Array</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>a</span>
<a name="line-119"></a><span class='hs-definition'>unsafeRead</span> <span class='hs-layout'>(</span><span class='hs-conid'>Array</span> <span class='hs-varid'>ref</span><span class='hs-layout'>)</span> <span class='hs-varid'>ix</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-120"></a> <span class='hs-conid'>AC</span> <span class='hs-varid'>es</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>cap</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>readIORef</span> <span class='hs-varid'>ref</span>
<a name="line-121"></a> <span class='hs-conid'>CHECK_BOUNDS</span><span class='hs-layout'>(</span><span class='hs-str'>"unsafeRead"</span><span class='hs-layout'>,</span><span class='hs-varid'>cap</span><span class='hs-layout'>,</span><span class='hs-varid'>ix</span><span class='hs-layout'>)</span>
<a name="line-122"></a> <span class='hs-varid'>withForeignPtr</span> <span class='hs-varid'>es</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>p</span> <span class='hs-keyglyph'>-></span>
<a name="line-123"></a> <span class='hs-varid'>peekElemOff</span> <span class='hs-varid'>p</span> <span class='hs-varid'>ix</span>
<a name="line-124"></a>
<a name="line-125"></a><a name="unsafeWrite"></a><span class='hs-definition'>unsafeWrite</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Storable</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Array</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></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-126"></a><span class='hs-definition'>unsafeWrite</span> <span class='hs-layout'>(</span><span class='hs-conid'>Array</span> <span class='hs-varid'>ref</span><span class='hs-layout'>)</span> <span class='hs-varid'>ix</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-127"></a> <span class='hs-varid'>ac</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>readIORef</span> <span class='hs-varid'>ref</span>
<a name="line-128"></a> <span class='hs-varid'>unsafeWrite'</span> <span class='hs-varid'>ac</span> <span class='hs-varid'>ix</span> <span class='hs-varid'>a</span>
<a name="line-129"></a>
<a name="line-130"></a><a name="unsafeWrite'"></a><span class='hs-definition'>unsafeWrite'</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Storable</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>AC</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></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-131"></a><span class='hs-definition'>unsafeWrite'</span> <span class='hs-layout'>(</span><span class='hs-conid'>AC</span> <span class='hs-varid'>es</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>cap</span><span class='hs-layout'>)</span> <span class='hs-varid'>ix</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-132"></a> <span class='hs-conid'>CHECK_BOUNDS</span><span class='hs-layout'>(</span><span class='hs-str'>"unsafeWrite'"</span><span class='hs-layout'>,</span><span class='hs-varid'>cap</span><span class='hs-layout'>,</span><span class='hs-varid'>ix</span><span class='hs-layout'>)</span>
<a name="line-133"></a> <span class='hs-varid'>withForeignPtr</span> <span class='hs-varid'>es</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>p</span> <span class='hs-keyglyph'>-></span>
<a name="line-134"></a> <span class='hs-varid'>pokeElemOff</span> <span class='hs-varid'>p</span> <span class='hs-varid'>ix</span> <span class='hs-varid'>a</span>
<a name="line-135"></a>
<a name="line-136"></a><a name="unsafeLoad"></a><span class='hs-definition'>unsafeLoad</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Storable</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Array</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Int</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Int</span>
<a name="line-137"></a><span class='hs-definition'>unsafeLoad</span> <span class='hs-layout'>(</span><span class='hs-conid'>Array</span> <span class='hs-varid'>ref</span><span class='hs-layout'>)</span> <span class='hs-varid'>load</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-138"></a> <span class='hs-conid'>AC</span> <span class='hs-varid'>es</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>cap</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>readIORef</span> <span class='hs-varid'>ref</span>
<a name="line-139"></a> <span class='hs-varid'>len'</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>withForeignPtr</span> <span class='hs-varid'>es</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>p</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>load</span> <span class='hs-varid'>p</span> <span class='hs-varid'>cap</span>
<a name="line-140"></a> <span class='hs-varid'>writeIORef</span> <span class='hs-varid'>ref</span> <span class='hs-layout'>(</span><span class='hs-conid'>AC</span> <span class='hs-varid'>es</span> <span class='hs-varid'>len'</span> <span class='hs-varid'>cap</span><span class='hs-layout'>)</span>
<a name="line-141"></a> <span class='hs-varid'>return</span> <span class='hs-varid'>len'</span>
<a name="line-142"></a>
<a name="line-143"></a><a name="ensureCapacity"></a><span class='hs-definition'>ensureCapacity</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Storable</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Array</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-144"></a><span class='hs-definition'>ensureCapacity</span> <span class='hs-layout'>(</span><span class='hs-conid'>Array</span> <span class='hs-varid'>ref</span><span class='hs-layout'>)</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-145"></a> <span class='hs-varid'>ac</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-conid'>AC</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>cap</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>readIORef</span> <span class='hs-varid'>ref</span>
<a name="line-146"></a> <span class='hs-varid'>ac'</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-conid'>AC</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>cap'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>ensureCapacity'</span> <span class='hs-varid'>ac</span> <span class='hs-varid'>c</span>
<a name="line-147"></a> <span class='hs-varid'>when</span> <span class='hs-layout'>(</span><span class='hs-varid'>cap'</span> <span class='hs-varop'>/=</span> <span class='hs-varid'>cap</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span>
<a name="line-148"></a> <span class='hs-varid'>writeIORef</span> <span class='hs-varid'>ref</span> <span class='hs-varid'>ac'</span>
<a name="line-149"></a>
<a name="line-150"></a><a name="ensureCapacity'"></a><span class='hs-definition'>ensureCapacity'</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Storable</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>AC</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>AC</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-151"></a><span class='hs-definition'>ensureCapacity'</span> <span class='hs-varid'>ac</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-conid'>AC</span> <span class='hs-varid'>es</span> <span class='hs-varid'>len</span> <span class='hs-varid'>cap</span><span class='hs-layout'>)</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-152"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>c</span> <span class='hs-varop'>></span> <span class='hs-varid'>cap</span>
<a name="line-153"></a> <span class='hs-keyword'>then</span> <span class='hs-keyword'>do</span>
<a name="line-154"></a> <span class='hs-varid'>es'</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>reallocArray</span> <span class='hs-varid'>es</span> <span class='hs-varid'>cap'</span> <span class='hs-varid'>cap</span>
<a name="line-155"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-conid'>AC</span> <span class='hs-varid'>es'</span> <span class='hs-varid'>len</span> <span class='hs-varid'>cap'</span><span class='hs-layout'>)</span>
<a name="line-156"></a> <span class='hs-keyword'>else</span>
<a name="line-157"></a> <span class='hs-varid'>return</span> <span class='hs-varid'>ac</span>
<a name="line-158"></a> <span class='hs-keyword'>where</span>
<a name="line-159"></a> <span class='hs-varid'>cap'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>firstPowerOf2</span> <span class='hs-varid'>c</span>
<a name="line-160"></a>
<a name="line-161"></a><a name="useAsPtr"></a><span class='hs-definition'>useAsPtr</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Array</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>b</span>
<a name="line-162"></a><span class='hs-definition'>useAsPtr</span> <span class='hs-layout'>(</span><span class='hs-conid'>Array</span> <span class='hs-varid'>ref</span><span class='hs-layout'>)</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-163"></a> <span class='hs-conid'>AC</span> <span class='hs-varid'>es</span> <span class='hs-varid'>len</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>readIORef</span> <span class='hs-varid'>ref</span>
<a name="line-164"></a> <span class='hs-varid'>withForeignPtr</span> <span class='hs-varid'>es</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>p</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>f</span> <span class='hs-varid'>p</span> <span class='hs-varid'>len</span>
<a name="line-165"></a>
<a name="line-166"></a><a name="snoc"></a><span class='hs-definition'>snoc</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Storable</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Array</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></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-167"></a><span class='hs-definition'>snoc</span> <span class='hs-layout'>(</span><span class='hs-conid'>Array</span> <span class='hs-varid'>ref</span><span class='hs-layout'>)</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-168"></a> <span class='hs-varid'>ac</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-conid'>AC</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>len</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>readIORef</span> <span class='hs-varid'>ref</span>
<a name="line-169"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>len'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>len</span> <span class='hs-varop'>+</span> <span class='hs-num'>1</span>
<a name="line-170"></a> <span class='hs-varid'>ac'</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-conid'>AC</span> <span class='hs-varid'>es</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>cap</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>ensureCapacity'</span> <span class='hs-varid'>ac</span> <span class='hs-varid'>len'</span>
<a name="line-171"></a> <span class='hs-varid'>unsafeWrite'</span> <span class='hs-varid'>ac'</span> <span class='hs-varid'>len</span> <span class='hs-varid'>e</span>
<a name="line-172"></a> <span class='hs-varid'>writeIORef</span> <span class='hs-varid'>ref</span> <span class='hs-layout'>(</span><span class='hs-conid'>AC</span> <span class='hs-varid'>es</span> <span class='hs-varid'>len'</span> <span class='hs-varid'>cap</span><span class='hs-layout'>)</span>
<a name="line-173"></a>
<a name="line-174"></a><a name="clear"></a><span class='hs-definition'>clear</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Storable</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Array</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-175"></a><span class='hs-definition'>clear</span> <span class='hs-layout'>(</span><span class='hs-conid'>Array</span> <span class='hs-varid'>ref</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-176"></a> <span class='hs-varop'>!</span><span class='hs-keyword'>_</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>atomicModifyIORef</span> <span class='hs-varid'>ref</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-layout'>(</span><span class='hs-conid'>AC</span> <span class='hs-varid'>es</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>cap</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span>
<a name="line-177"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>AC</span> <span class='hs-varid'>es</span> <span class='hs-num'>0</span> <span class='hs-varid'>cap</span> <span class='hs-keyword'>in</span> <span class='hs-layout'>(</span><span class='hs-varid'>e</span><span class='hs-layout'>,</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span>
<a name="line-178"></a> <span class='hs-varid'>return</span> <span class='hs-conid'>()</span>
<a name="line-179"></a>
<a name="line-180"></a><a name="forM_"></a><span class='hs-definition'>forM_</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Storable</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Array</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-181"></a><span class='hs-definition'>forM_</span> <span class='hs-varid'>ary</span> <span class='hs-varid'>g</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>forHack</span> <span class='hs-varid'>ary</span> <span class='hs-varid'>g</span> <span class='hs-varid'>undefined</span>
<a name="line-182"></a> <span class='hs-keyword'>where</span>
<a name="line-183"></a> <span class='hs-varid'>forHack</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Storable</span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Array</span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-184"></a> <span class='hs-varid'>forHack</span> <span class='hs-layout'>(</span><span class='hs-conid'>Array</span> <span class='hs-varid'>ref</span><span class='hs-layout'>)</span> <span class='hs-varid'>f</span> <span class='hs-varid'>dummy</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-185"></a> <span class='hs-conid'>AC</span> <span class='hs-varid'>es</span> <span class='hs-varid'>len</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>readIORef</span> <span class='hs-varid'>ref</span>
<a name="line-186"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>size</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>sizeOf</span> <span class='hs-varid'>dummy</span>
<a name="line-187"></a> <span class='hs-varid'>offset</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>len</span> <span class='hs-varop'>*</span> <span class='hs-varid'>size</span>
<a name="line-188"></a> <span class='hs-varid'>withForeignPtr</span> <span class='hs-varid'>es</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>p</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-189"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>go</span> <span class='hs-varid'>n</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>n</span> <span class='hs-varop'>>=</span> <span class='hs-varid'>offset</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-conid'>()</span>
<a name="line-190"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-191"></a> <span class='hs-varid'>f</span> <span class='hs-varop'>=<<</span> <span class='hs-varid'>peek</span> <span class='hs-layout'>(</span><span class='hs-varid'>p</span> <span class='hs-varop'>`plusPtr`</span> <span class='hs-varid'>n</span><span class='hs-layout'>)</span>
<a name="line-192"></a> <span class='hs-varid'>go</span> <span class='hs-layout'>(</span><span class='hs-varid'>n</span> <span class='hs-varop'>+</span> <span class='hs-varid'>size</span><span class='hs-layout'>)</span>
<a name="line-193"></a> <span class='hs-varid'>go</span> <span class='hs-num'>0</span>
<a name="line-194"></a>
<a name="line-195"></a><a name="loop"></a><span class='hs-definition'>loop</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Storable</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Array</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-varid'>b</span><span class='hs-layout'>,</span><span class='hs-conid'>Bool</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-196"></a><span class='hs-definition'>loop</span> <span class='hs-varid'>ary</span> <span class='hs-varid'>z</span> <span class='hs-varid'>g</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>loopHack</span> <span class='hs-varid'>ary</span> <span class='hs-varid'>z</span> <span class='hs-varid'>g</span> <span class='hs-varid'>undefined</span>
<a name="line-197"></a> <span class='hs-keyword'>where</span>
<a name="line-198"></a> <span class='hs-varid'>loopHack</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Storable</span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Array</span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>c</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-varid'>c</span><span class='hs-layout'>,</span><span class='hs-conid'>Bool</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>b</span>
<a name="line-199"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-200"></a> <span class='hs-varid'>loopHack</span> <span class='hs-layout'>(</span><span class='hs-conid'>Array</span> <span class='hs-varid'>ref</span><span class='hs-layout'>)</span> <span class='hs-varid'>y</span> <span class='hs-varid'>f</span> <span class='hs-varid'>dummy</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-201"></a> <span class='hs-conid'>AC</span> <span class='hs-varid'>es</span> <span class='hs-varid'>len</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>readIORef</span> <span class='hs-varid'>ref</span>
<a name="line-202"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>size</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>sizeOf</span> <span class='hs-varid'>dummy</span>
<a name="line-203"></a> <span class='hs-varid'>offset</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>len</span> <span class='hs-varop'>*</span> <span class='hs-varid'>size</span>
<a name="line-204"></a> <span class='hs-varid'>withForeignPtr</span> <span class='hs-varid'>es</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>p</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-205"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>go</span> <span class='hs-varid'>n</span> <span class='hs-varid'>k</span>
<a name="line-206"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>n</span> <span class='hs-varop'>>=</span> <span class='hs-varid'>offset</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-conid'>()</span>
<a name="line-207"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-208"></a> <span class='hs-layout'>(</span><span class='hs-varid'>k'</span><span class='hs-layout'>,</span><span class='hs-varid'>cont</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>f</span> <span class='hs-varid'>k</span> <span class='hs-varop'>=<<</span> <span class='hs-varid'>peek</span> <span class='hs-layout'>(</span><span class='hs-varid'>p</span> <span class='hs-varop'>`plusPtr`</span> <span class='hs-varid'>n</span><span class='hs-layout'>)</span>
<a name="line-209"></a> <span class='hs-varid'>when</span> <span class='hs-varid'>cont</span> <span class='hs-varop'>$</span> <span class='hs-varid'>go</span> <span class='hs-layout'>(</span><span class='hs-varid'>n</span> <span class='hs-varop'>+</span> <span class='hs-varid'>size</span><span class='hs-layout'>)</span> <span class='hs-varid'>k'</span>
<a name="line-210"></a> <span class='hs-varid'>go</span> <span class='hs-num'>0</span> <span class='hs-varid'>y</span>
<a name="line-211"></a>
<a name="line-212"></a><a name="findIndex"></a><span class='hs-definition'>findIndex</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Storable</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Array</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>Maybe</span> <span class='hs-layout'>(</span><span class='hs-conid'>Int</span><span class='hs-layout'>,</span><span class='hs-varid'>a</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-213"></a><span class='hs-definition'>findIndex</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>findHack</span> <span class='hs-varid'>undefined</span>
<a name="line-214"></a> <span class='hs-keyword'>where</span>
<a name="line-215"></a> <span class='hs-varid'>findHack</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Storable</span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>=></span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Array</span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>Maybe</span> <span class='hs-layout'>(</span><span class='hs-conid'>Int</span><span class='hs-layout'>,</span><span class='hs-varid'>b</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-216"></a> <span class='hs-varid'>findHack</span> <span class='hs-varid'>dummy</span> <span class='hs-varid'>p</span> <span class='hs-layout'>(</span><span class='hs-conid'>Array</span> <span class='hs-varid'>ref</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-217"></a> <span class='hs-conid'>AC</span> <span class='hs-varid'>es</span> <span class='hs-varid'>len</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>readIORef</span> <span class='hs-varid'>ref</span>
<a name="line-218"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>size</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>sizeOf</span> <span class='hs-varid'>dummy</span>
<a name="line-219"></a> <span class='hs-varid'>offset</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>len</span> <span class='hs-varop'>*</span> <span class='hs-varid'>size</span>
<a name="line-220"></a> <span class='hs-varid'>withForeignPtr</span> <span class='hs-varid'>es</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>ptr</span> <span class='hs-keyglyph'>-></span>
<a name="line-221"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>go</span> <span class='hs-varop'>!</span><span class='hs-varid'>n</span> <span class='hs-varop'>!</span><span class='hs-varid'>i</span>
<a name="line-222"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>n</span> <span class='hs-varop'>>=</span> <span class='hs-varid'>offset</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-conid'>Nothing</span>
<a name="line-223"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-224"></a> <span class='hs-varid'>val</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>peek</span> <span class='hs-layout'>(</span><span class='hs-varid'>ptr</span> <span class='hs-varop'>`plusPtr`</span> <span class='hs-varid'>n</span><span class='hs-layout'>)</span>
<a name="line-225"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>p</span> <span class='hs-varid'>val</span>
<a name="line-226"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-varid'>i</span><span class='hs-layout'>,</span> <span class='hs-varid'>val</span><span class='hs-layout'>)</span>
<a name="line-227"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>go</span> <span class='hs-layout'>(</span><span class='hs-varid'>n</span> <span class='hs-varop'>+</span> <span class='hs-varid'>size</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>i</span> <span class='hs-varop'>+</span> <span class='hs-num'>1</span><span class='hs-layout'>)</span>
<a name="line-228"></a> <span class='hs-keyword'>in</span> <span class='hs-varid'>go</span> <span class='hs-num'>0</span> <span class='hs-num'>0</span>
<a name="line-229"></a>
<a name="line-230"></a><a name="concat"></a><span class='hs-definition'>concat</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Storable</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Array</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Array</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-231"></a><span class='hs-definition'>concat</span> <span class='hs-layout'>(</span><span class='hs-conid'>Array</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Array</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-232"></a> <span class='hs-varid'>da</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-conid'>AC</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>dlen</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>readIORef</span> <span class='hs-varid'>d</span>
<a name="line-233"></a> <span class='hs-varid'>sa</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-conid'>AC</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>slen</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>readIORef</span> <span class='hs-varid'>s</span>
<a name="line-234"></a> <span class='hs-varid'>writeIORef</span> <span class='hs-varid'>d</span> <span class='hs-varop'>=<<</span> <span class='hs-varid'>copy'</span> <span class='hs-varid'>da</span> <span class='hs-varid'>dlen</span> <span class='hs-varid'>sa</span> <span class='hs-num'>0</span> <span class='hs-varid'>slen</span>
<a name="line-235"></a>
<a name="line-236"></a><a name="copy"></a><span class='hs-comment'>-- | Copy part of the source array into the destination array. The</span>
<a name="line-237"></a><span class='hs-comment'>-- destination array is resized if not large enough.</span>
<a name="line-238"></a><span class='hs-definition'>copy</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Storable</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Array</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Array</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-239"></a><span class='hs-definition'>copy</span> <span class='hs-layout'>(</span><span class='hs-conid'>Array</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-varid'>dstart</span> <span class='hs-layout'>(</span><span class='hs-conid'>Array</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-varid'>sstart</span> <span class='hs-varid'>maxCount</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-240"></a> <span class='hs-varid'>da</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>readIORef</span> <span class='hs-varid'>d</span>
<a name="line-241"></a> <span class='hs-varid'>sa</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>readIORef</span> <span class='hs-varid'>s</span>
<a name="line-242"></a> <span class='hs-varid'>writeIORef</span> <span class='hs-varid'>d</span> <span class='hs-varop'>=<<</span> <span class='hs-varid'>copy'</span> <span class='hs-varid'>da</span> <span class='hs-varid'>dstart</span> <span class='hs-varid'>sa</span> <span class='hs-varid'>sstart</span> <span class='hs-varid'>maxCount</span>
<a name="line-243"></a>
<a name="line-244"></a><a name="copy'"></a><span class='hs-comment'>-- | Copy part of the source array into the destination array. The</span>
<a name="line-245"></a><span class='hs-comment'>-- destination array is resized if not large enough.</span>
<a name="line-246"></a><span class='hs-definition'>copy'</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Storable</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>AC</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>AC</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>AC</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-247"></a><span class='hs-definition'>copy'</span> <span class='hs-varid'>d</span> <span class='hs-varid'>dstart</span> <span class='hs-varid'>s</span> <span class='hs-varid'>sstart</span> <span class='hs-varid'>maxCount</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>copyHack</span> <span class='hs-varid'>d</span> <span class='hs-varid'>s</span> <span class='hs-varid'>undefined</span>
<a name="line-248"></a> <span class='hs-keyword'>where</span>
<a name="line-249"></a> <span class='hs-varid'>copyHack</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Storable</span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>AC</span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>AC</span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>AC</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span>
<a name="line-250"></a> <span class='hs-varid'>copyHack</span> <span class='hs-varid'>dac</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-conid'>AC</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>oldLen</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>AC</span> <span class='hs-varid'>src</span> <span class='hs-varid'>slen</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-varid'>dummy</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-251"></a> <span class='hs-varid'>when</span> <span class='hs-layout'>(</span><span class='hs-varid'>maxCount</span> <span class='hs-varop'><</span> <span class='hs-num'>0</span> <span class='hs-varop'>||</span> <span class='hs-varid'>dstart</span> <span class='hs-varop'><</span> <span class='hs-num'>0</span> <span class='hs-varop'>||</span> <span class='hs-varid'>dstart</span> <span class='hs-varop'>></span> <span class='hs-varid'>oldLen</span> <span class='hs-varop'>||</span> <span class='hs-varid'>sstart</span> <span class='hs-varop'><</span> <span class='hs-num'>0</span> <span class='hs-varop'>||</span>
<a name="line-252"></a> <span class='hs-varid'>sstart</span> <span class='hs-varop'>></span> <span class='hs-varid'>slen</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>error</span> <span class='hs-str'>"copy: bad offsets or lengths"</span>
<a name="line-253"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>size</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>sizeOf</span> <span class='hs-varid'>dummy</span>
<a name="line-254"></a> <span class='hs-varid'>count</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>min</span> <span class='hs-varid'>maxCount</span> <span class='hs-layout'>(</span><span class='hs-varid'>slen</span> <span class='hs-comment'>-</span> <span class='hs-varid'>sstart</span><span class='hs-layout'>)</span>
<a name="line-255"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>count</span> <span class='hs-varop'>==</span> <span class='hs-num'>0</span>
<a name="line-256"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>return</span> <span class='hs-varid'>dac</span>
<a name="line-257"></a> <span class='hs-keyword'>else</span> <span class='hs-keyword'>do</span>
<a name="line-258"></a> <span class='hs-conid'>AC</span> <span class='hs-varid'>dst</span> <span class='hs-varid'>dlen</span> <span class='hs-varid'>dcap</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>ensureCapacity'</span> <span class='hs-varid'>dac</span> <span class='hs-layout'>(</span><span class='hs-varid'>dstart</span> <span class='hs-varop'>+</span> <span class='hs-varid'>count</span><span class='hs-layout'>)</span>
<a name="line-259"></a> <span class='hs-varid'>withForeignPtr</span> <span class='hs-varid'>dst</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>dptr</span> <span class='hs-keyglyph'>-></span>
<a name="line-260"></a> <span class='hs-varid'>withForeignPtr</span> <span class='hs-varid'>src</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>sptr</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-261"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>memcpy</span> <span class='hs-layout'>(</span><span class='hs-varid'>dptr</span> <span class='hs-varop'>`plusPtr`</span> <span class='hs-layout'>(</span><span class='hs-varid'>dstart</span> <span class='hs-varop'>*</span> <span class='hs-varid'>size</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-262"></a> <span class='hs-layout'>(</span><span class='hs-varid'>sptr</span> <span class='hs-varop'>`plusPtr`</span> <span class='hs-layout'>(</span><span class='hs-varid'>sstart</span> <span class='hs-varop'>*</span> <span class='hs-varid'>size</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-263"></a> <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-layout'>(</span><span class='hs-varid'>count</span> <span class='hs-varop'>*</span> <span class='hs-varid'>size</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-264"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-conid'>AC</span> <span class='hs-varid'>dst</span> <span class='hs-layout'>(</span><span class='hs-varid'>max</span> <span class='hs-varid'>dlen</span> <span class='hs-layout'>(</span><span class='hs-varid'>dstart</span> <span class='hs-varop'>+</span> <span class='hs-varid'>count</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>dcap</span>
<a name="line-265"></a>
<a name="line-266"></a><a name="removeAt"></a><span class='hs-definition'>removeAt</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Storable</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Array</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-267"></a><span class='hs-definition'>removeAt</span> <span class='hs-varid'>a</span> <span class='hs-varid'>i</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>removeHack</span> <span class='hs-varid'>a</span> <span class='hs-varid'>undefined</span>
<a name="line-268"></a> <span class='hs-keyword'>where</span>
<a name="line-269"></a> <span class='hs-varid'>removeHack</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Storable</span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Array</span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-270"></a> <span class='hs-varid'>removeHack</span> <span class='hs-layout'>(</span><span class='hs-conid'>Array</span> <span class='hs-varid'>ary</span><span class='hs-layout'>)</span> <span class='hs-varid'>dummy</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-271"></a> <span class='hs-conid'>AC</span> <span class='hs-varid'>fp</span> <span class='hs-varid'>oldLen</span> <span class='hs-varid'>cap</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>readIORef</span> <span class='hs-varid'>ary</span>
<a name="line-272"></a> <span class='hs-varid'>when</span> <span class='hs-layout'>(</span><span class='hs-varid'>i</span> <span class='hs-varop'><</span> <span class='hs-num'>0</span> <span class='hs-varop'>||</span> <span class='hs-varid'>i</span> <span class='hs-varop'>>=</span> <span class='hs-varid'>oldLen</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>error</span> <span class='hs-str'>"removeAt: invalid index"</span>
<a name="line-273"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>size</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>sizeOf</span> <span class='hs-varid'>dummy</span>
<a name="line-274"></a> <span class='hs-varid'>newLen</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>oldLen</span> <span class='hs-comment'>-</span> <span class='hs-num'>1</span>
<a name="line-275"></a> <span class='hs-varid'>when</span> <span class='hs-layout'>(</span><span class='hs-varid'>newLen</span> <span class='hs-varop'>></span> <span class='hs-num'>0</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>i</span> <span class='hs-varop'><</span> <span class='hs-varid'>newLen</span><span class='hs-layout'>)</span> <span class='hs-varop'>.</span>
<a name="line-276"></a> <span class='hs-varid'>withForeignPtr</span> <span class='hs-varid'>fp</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>ptr</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-277"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>memmove</span> <span class='hs-layout'>(</span><span class='hs-varid'>ptr</span> <span class='hs-varop'>`plusPtr`</span> <span class='hs-layout'>(</span><span class='hs-varid'>size</span> <span class='hs-varop'>*</span> <span class='hs-varid'>i</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-278"></a> <span class='hs-layout'>(</span><span class='hs-varid'>ptr</span> <span class='hs-varop'>`plusPtr`</span> <span class='hs-layout'>(</span><span class='hs-varid'>size</span> <span class='hs-varop'>*</span> <span class='hs-layout'>(</span><span class='hs-varid'>i</span><span class='hs-varop'>+</span><span class='hs-num'>1</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-279"></a> <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-layout'>(</span><span class='hs-varid'>size</span> <span class='hs-varop'>*</span> <span class='hs-layout'>(</span><span class='hs-varid'>newLen</span><span class='hs-comment'>-</span><span class='hs-varid'>i</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-280"></a> <span class='hs-varid'>return</span> <span class='hs-conid'>()</span>
<a name="line-281"></a> <span class='hs-varid'>writeIORef</span> <span class='hs-varid'>ary</span> <span class='hs-layout'>(</span><span class='hs-conid'>AC</span> <span class='hs-varid'>fp</span> <span class='hs-varid'>newLen</span> <span class='hs-varid'>cap</span><span class='hs-layout'>)</span>
<a name="line-282"></a>
<a name="line-283"></a><span class='hs-comment'>{-The firstPowerOf2 function works by setting all bits on the right-hand
<a name="line-284"></a>side of the most significant flagged bit to 1, and then incrementing
<a name="line-285"></a>the entire value at the end so it "rolls over" to the nearest power of
<a name="line-286"></a>two.
<a name="line-287"></a>-}</span>
<a name="line-288"></a>
<a name="line-289"></a><a name="firstPowerOf2"></a><span class='hs-comment'>-- | Computes the next-highest power of two for a particular integer,</span>
<a name="line-290"></a><span class='hs-comment'>-- @n@. If @n@ is already a power of two, returns @n@. If @n@ is</span>
<a name="line-291"></a><span class='hs-comment'>-- zero, returns zero, even though zero is not a power of two.</span>
<a name="line-292"></a><span class='hs-definition'>firstPowerOf2</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span>
<a name="line-293"></a><a name="!"></a><span class='hs-definition'>firstPowerOf2</span> <span class='hs-varop'>!</span><span class='hs-varid'>n</span> <span class='hs-keyglyph'>=</span>
<a name="line-294"></a> <span class='hs-keyword'>let</span> <span class='hs-varop'>!</span><span class='hs-varid'>n1</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>n</span> <span class='hs-comment'>-</span> <span class='hs-num'>1</span>
<a name="line-295"></a> <span class='hs-varop'>!</span><span class='hs-varid'>n2</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>n1</span> <span class='hs-varop'>.|.</span> <span class='hs-layout'>(</span><span class='hs-varid'>n1</span> <span class='hs-varop'>`shiftR`</span> <span class='hs-num'>1</span><span class='hs-layout'>)</span>
<a name="line-296"></a> <span class='hs-varop'>!</span><span class='hs-varid'>n3</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>n2</span> <span class='hs-varop'>.|.</span> <span class='hs-layout'>(</span><span class='hs-varid'>n2</span> <span class='hs-varop'>`shiftR`</span> <span class='hs-num'>2</span><span class='hs-layout'>)</span>
<a name="line-297"></a> <span class='hs-varop'>!</span><span class='hs-varid'>n4</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>n3</span> <span class='hs-varop'>.|.</span> <span class='hs-layout'>(</span><span class='hs-varid'>n3</span> <span class='hs-varop'>`shiftR`</span> <span class='hs-num'>4</span><span class='hs-layout'>)</span>
<a name="line-298"></a> <span class='hs-varop'>!</span><span class='hs-varid'>n5</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>n4</span> <span class='hs-varop'>.|.</span> <span class='hs-layout'>(</span><span class='hs-varid'>n4</span> <span class='hs-varop'>`shiftR`</span> <span class='hs-num'>8</span><span class='hs-layout'>)</span>
<a name="line-299"></a> <span class='hs-varop'>!</span><span class='hs-varid'>n6</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>n5</span> <span class='hs-varop'>.|.</span> <span class='hs-layout'>(</span><span class='hs-varid'>n5</span> <span class='hs-varop'>`shiftR`</span> <span class='hs-num'>16</span><span class='hs-layout'>)</span>
<a name="line-300"></a><span class='hs-cpp'>#if WORD_SIZE_IN_BITS == 32</span>
<a name="line-301"></a> <span class='hs-keyword'>in</span> <span class='hs-varid'>n6</span> <span class='hs-varop'>+</span> <span class='hs-num'>1</span>
<a name="line-302"></a><span class='hs-cpp'>#elif WORD_SIZE_IN_BITS == 64</span>
<a name="line-303"></a> <span class='hs-varop'>!</span><span class='hs-varid'>n7</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>n6</span> <span class='hs-varop'>.|.</span> <span class='hs-layout'>(</span><span class='hs-varid'>n6</span> <span class='hs-varop'>`shiftR`</span> <span class='hs-num'>32</span><span class='hs-layout'>)</span>
<a name="line-304"></a> <span class='hs-keyword'>in</span> <span class='hs-varid'>n7</span> <span class='hs-varop'>+</span> <span class='hs-num'>1</span>
<a name="line-305"></a><span class='hs-cpp'>#else</span>
<a name="line-306"></a><span class='hs-cpp'># error firstPowerOf2 not defined on this architecture</span>
<a name="line-307"></a><span class='hs-cpp'>#endif</span>
<a name="line-308"></a>
<a name="line-309"></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-310"></a> <span class='hs-varid'>memcpy</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'>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-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-311"></a>
<a name="line-312"></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 memmove"</span>
<a name="line-313"></a> <span class='hs-varid'>memmove</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'>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-varid'>a</span><span class='hs-layout'>)</span>
</pre></body>
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