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<title>Blaze/ByteString/Builder/Internal/Write.hs</title>
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<pre><a name="line-1"></a><span class='hs-comment'>{-# LANGUAGE CPP, BangPatterns, 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.WriteIO</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'>-- (c) 2010 Jasper van der Jeugt</span>
<a name="line-6"></a><span class='hs-comment'>-- License : BSD3-style (see LICENSE)</span>
<a name="line-7"></a><span class='hs-comment'>-- </span>
<a name="line-8"></a><span class='hs-comment'>-- Maintainer : Simon Meier <iridcode@gmail.com></span>
<a name="line-9"></a><span class='hs-comment'>-- Stability : experimental</span>
<a name="line-10"></a><span class='hs-comment'>-- Portability : tested on GHC only</span>
<a name="line-11"></a><span class='hs-comment'>--</span>
<a name="line-12"></a><span class='hs-comment'>-- A general and efficient write type that allows for the easy construction of</span>
<a name="line-13"></a><span class='hs-comment'>-- builders for (smallish) bounded size writes to a buffer.</span>
<a name="line-14"></a><span class='hs-comment'>--</span>
<a name="line-15"></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'>Write</span> <span class='hs-layout'>(</span>
<a name="line-16"></a> <span class='hs-comment'>-- * Abstracting writes to a buffer</span>
<a name="line-17"></a> <span class='hs-conid'>Write</span>
<a name="line-18"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>WriteIO</span>
<a name="line-19"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>writeN</span>
<a name="line-20"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>exactWrite</span>
<a name="line-21"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>boundedWrite</span>
<a name="line-22"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>runWrite</span>
<a name="line-23"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>runWriteIO</span>
<a name="line-24"></a>
<a name="line-25"></a> <span class='hs-comment'>-- * Constructing builders from writes</span>
<a name="line-26"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>fromWrite</span>
<a name="line-27"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>fromWriteSingleton</span>
<a name="line-28"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>fromWriteList</span>
<a name="line-29"></a>
<a name="line-30"></a> <span class='hs-comment'>-- * Writing 'Storable's</span>
<a name="line-31"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>writeStorable</span>
<a name="line-32"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>fromStorable</span>
<a name="line-33"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>fromStorables</span>
<a name="line-34"></a>
<a name="line-35"></a> <span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-36"></a>
<a name="line-37"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Foreign</span>
<a name="line-38"></a>
<a name="line-39"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Monoid</span>
<a name="line-40"></a>
<a name="line-41"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Monad</span>
<a name="line-42"></a>
<a name="line-43"></a><span class='hs-keyword'>import</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'>Types</span>
<a name="line-44"></a>
<a name="line-45"></a>
<a name="line-46"></a><span class='hs-comment'>------------------------------------------------------------------------------</span>
<a name="line-47"></a><span class='hs-comment'>-- The Write WriteIO Type</span>
<a name="line-48"></a><span class='hs-comment'>------------------------------------------------------------------------------</span>
<a name="line-49"></a>
<a name="line-50"></a><span class='hs-comment'>-- Sadly GHC is not smart enough: code where we branch and each branch should</span>
<a name="line-51"></a><span class='hs-comment'>-- execute a few IO actions and then return a value cannot be taught to GHC. At</span>
<a name="line-52"></a><span class='hs-comment'>-- least not such that it returns the value of the branches unpacked.</span>
<a name="line-53"></a><span class='hs-comment'>--</span>
<a name="line-54"></a><span class='hs-comment'>-- Hmm.. at least he behaves much better for the Monoid instance of Write</span>
<a name="line-55"></a><span class='hs-comment'>-- than the one for WriteIO. Serializing UTF-8 chars gets a slowdown of a</span>
<a name="line-56"></a><span class='hs-comment'>-- factor 2 when 2 chars are composed. Perhaps I should try out the writeList</span>
<a name="line-57"></a><span class='hs-comment'>-- instances also, as they may be more sensitive to to much work per Char.</span>
<a name="line-58"></a><span class='hs-comment'>--</span>
<a name="line-59"></a>
<a name="line-60"></a><a name="WriteIO"></a><span class='hs-comment'>-- | A write to a buffer.</span>
<a name="line-61"></a><a name="WriteIO"></a><span class='hs-comment'>--</span>
<a name="line-62"></a><a name="WriteIO"></a><span class='hs-comment'>-- FIXME: Find better name: what about 'Poke' ?</span>
<a name="line-63"></a><a name="WriteIO"></a><span class='hs-keyword'>newtype</span> <span class='hs-conid'>WriteIO</span> <span class='hs-keyglyph'>=</span>
<a name="line-64"></a> <span class='hs-conid'>WriteIO</span> <span class='hs-layout'>{</span> <span class='hs-varid'>runWriteIO</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'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>Word8</span><span class='hs-layout'>)</span> <span class='hs-layout'>}</span>
<a name="line-65"></a>
<a name="line-66"></a><a name="Write"></a><span class='hs-comment'>-- | A write of a bounded number of bytes.</span>
<a name="line-67"></a><a name="Write"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>Write</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Write</span> <span class='hs-comment'>{-# UNPACK #-}</span> <span class='hs-varop'>!</span><span class='hs-conid'>Int</span> <span class='hs-conid'>WriteIO</span>
<a name="line-68"></a>
<a name="line-69"></a><a name="runWrite"></a><span class='hs-comment'>-- | Extract the 'WriteIO' action of a write.</span>
<a name="line-70"></a><span class='hs-comment'>{-# INLINE runWrite #-}</span>
<a name="line-71"></a><span class='hs-definition'>runWrite</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Write</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>WriteIO</span>
<a name="line-72"></a><span class='hs-definition'>runWrite</span> <span class='hs-layout'>(</span><span class='hs-conid'>Write</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>wio</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>wio</span>
<a name="line-73"></a>
<a name="line-74"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Monoid</span> <span class='hs-conid'>WriteIO</span> <span class='hs-keyword'>where</span>
<a name="line-75"></a> <span class='hs-varid'>mempty</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>WriteIO</span> <span class='hs-varop'>$</span> <span class='hs-varid'>return</span>
<a name="line-76"></a> <span class='hs-comment'>{-# INLINE mempty #-}</span>
<a name="line-77"></a> <span class='hs-layout'>(</span><span class='hs-conid'>WriteIO</span> <span class='hs-varid'>w1</span><span class='hs-layout'>)</span> <span class='hs-varop'>`mappend`</span> <span class='hs-layout'>(</span><span class='hs-conid'>WriteIO</span> <span class='hs-varid'>w2</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>WriteIO</span> <span class='hs-varop'>$</span> <span class='hs-varid'>w1</span> <span class='hs-varop'>>=></span> <span class='hs-varid'>w2</span>
<a name="line-78"></a> <span class='hs-comment'>{-# INLINE mappend #-}</span>
<a name="line-79"></a> <span class='hs-varid'>mconcat</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>foldr</span> <span class='hs-varid'>mappend</span> <span class='hs-varid'>mempty</span>
<a name="line-80"></a> <span class='hs-comment'>{-# INLINE mconcat #-}</span>
<a name="line-81"></a>
<a name="line-82"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Monoid</span> <span class='hs-conid'>Write</span> <span class='hs-keyword'>where</span>
<a name="line-83"></a> <span class='hs-varid'>mempty</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Write</span> <span class='hs-num'>0</span> <span class='hs-varid'>mempty</span>
<a name="line-84"></a> <span class='hs-comment'>{-# INLINE mempty #-}</span>
<a name="line-85"></a> <span class='hs-layout'>(</span><span class='hs-conid'>Write</span> <span class='hs-varid'>bound1</span> <span class='hs-varid'>w1</span><span class='hs-layout'>)</span> <span class='hs-varop'>`mappend`</span> <span class='hs-layout'>(</span><span class='hs-conid'>Write</span> <span class='hs-varid'>bound2</span> <span class='hs-varid'>w2</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-86"></a> <span class='hs-conid'>Write</span> <span class='hs-layout'>(</span><span class='hs-varid'>bound1</span> <span class='hs-varop'>+</span> <span class='hs-varid'>bound2</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>w1</span> <span class='hs-varop'>`mappend`</span> <span class='hs-varid'>w2</span><span class='hs-layout'>)</span>
<a name="line-87"></a> <span class='hs-comment'>{-# INLINE mappend #-}</span>
<a name="line-88"></a> <span class='hs-varid'>mconcat</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>foldr</span> <span class='hs-varid'>mappend</span> <span class='hs-varid'>mempty</span>
<a name="line-89"></a> <span class='hs-comment'>{-# INLINE mconcat #-}</span>
<a name="line-90"></a>
<a name="line-91"></a>
<a name="line-92"></a><a name="writeN"></a><span class='hs-comment'>-- | @writeN size io@ creates a write that denotes the writing of @size@ bytes</span>
<a name="line-93"></a><span class='hs-comment'>-- to a buffer using the IO action @io@. Note that @io@ MUST write EXACTLY @size@</span>
<a name="line-94"></a><span class='hs-comment'>-- bytes to the buffer!</span>
<a name="line-95"></a><span class='hs-definition'>writeN</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int</span>
<a name="line-96"></a> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>Word8</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'>WriteIO</span>
<a name="line-97"></a><span class='hs-definition'>writeN</span> <span class='hs-varid'>size</span> <span class='hs-varid'>io</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>WriteIO</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>op</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>io</span> <span class='hs-varid'>op</span> <span class='hs-varop'>>></span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>op</span> <span class='hs-varop'>`plusPtr`</span> <span class='hs-varid'>size</span><span class='hs-layout'>)</span>
<a name="line-98"></a><span class='hs-comment'>{-# INLINE writeN #-}</span>
<a name="line-99"></a>
<a name="line-100"></a>
<a name="line-101"></a><a name="exactWrite"></a><span class='hs-comment'>-- | @exactWrite size io@ creates a bounded write that can later be converted to</span>
<a name="line-102"></a><span class='hs-comment'>-- a builder that writes exactly @size@ bytes. Note that @io@ MUST write</span>
<a name="line-103"></a><span class='hs-comment'>-- EXACTLY @size@ bytes to the buffer!</span>
<a name="line-104"></a><span class='hs-definition'>exactWrite</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int</span>
<a name="line-105"></a> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>Word8</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span><span class='hs-layout'>)</span>
<a name="line-106"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Write</span>
<a name="line-107"></a><span class='hs-definition'>exactWrite</span> <span class='hs-varid'>size</span> <span class='hs-varid'>io</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Write</span> <span class='hs-varid'>size</span> <span class='hs-layout'>(</span><span class='hs-varid'>writeN</span> <span class='hs-varid'>size</span> <span class='hs-varid'>io</span><span class='hs-layout'>)</span>
<a name="line-108"></a><span class='hs-comment'>{-# INLINE exactWrite #-}</span>
<a name="line-109"></a>
<a name="line-110"></a><a name="boundedWrite"></a><span class='hs-comment'>-- | @boundedWrite size write@ creates a bounded write from a @write@ that does</span>
<a name="line-111"></a><span class='hs-comment'>-- not write more than @size@ bytes.</span>
<a name="line-112"></a><span class='hs-definition'>boundedWrite</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>WriteIO</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Write</span>
<a name="line-113"></a><span class='hs-definition'>boundedWrite</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Write</span>
<a name="line-114"></a><span class='hs-comment'>{-# INLINE boundedWrite #-}</span>
<a name="line-115"></a>
<a name="line-116"></a><a name="fromWrite"></a><span class='hs-definition'>fromWrite</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Write</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Builder</span>
<a name="line-117"></a><span class='hs-definition'>fromWrite</span> <span class='hs-layout'>(</span><span class='hs-conid'>Write</span> <span class='hs-varid'>maxSize</span> <span class='hs-varid'>wio</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-118"></a> <span class='hs-varid'>fromBuildStepCont</span> <span class='hs-varid'>step</span>
<a name="line-119"></a> <span class='hs-keyword'>where</span>
<a name="line-120"></a> <span class='hs-varid'>step</span> <span class='hs-varid'>k</span> <span class='hs-layout'>(</span><span class='hs-conid'>BufRange</span> <span class='hs-varid'>op</span> <span class='hs-varid'>ope</span><span class='hs-layout'>)</span>
<a name="line-121"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>op</span> <span class='hs-varop'>`plusPtr`</span> <span class='hs-varid'>maxSize</span> <span class='hs-varop'><=</span> <span class='hs-varid'>ope</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-122"></a> <span class='hs-varid'>op'</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>runWriteIO</span> <span class='hs-varid'>wio</span> <span class='hs-varid'>op</span>
<a name="line-123"></a> <span class='hs-keyword'>let</span> <span class='hs-varop'>!</span><span class='hs-varid'>br'</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>BufRange</span> <span class='hs-varid'>op'</span> <span class='hs-varid'>ope</span>
<a name="line-124"></a> <span class='hs-varid'>k</span> <span class='hs-varid'>br'</span>
<a name="line-125"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-varid'>bufferFull</span> <span class='hs-varid'>maxSize</span> <span class='hs-varid'>op</span> <span class='hs-layout'>(</span><span class='hs-varid'>step</span> <span class='hs-varid'>k</span><span class='hs-layout'>)</span>
<a name="line-126"></a><span class='hs-comment'>{-# INLINE fromWrite #-}</span>
<a name="line-127"></a>
<a name="line-128"></a><a name="fromWriteSingleton"></a><span class='hs-definition'>fromWriteSingleton</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'>Write</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Builder</span>
<a name="line-129"></a><span class='hs-definition'>fromWriteSingleton</span> <span class='hs-varid'>write</span> <span class='hs-keyglyph'>=</span>
<a name="line-130"></a> <span class='hs-varid'>mkBuilder</span>
<a name="line-131"></a> <span class='hs-keyword'>where</span>
<a name="line-132"></a> <span class='hs-varid'>mkBuilder</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromBuildStepCont</span> <span class='hs-varid'>step</span>
<a name="line-133"></a> <span class='hs-keyword'>where</span>
<a name="line-134"></a> <span class='hs-varid'>step</span> <span class='hs-varid'>k</span> <span class='hs-layout'>(</span><span class='hs-conid'>BufRange</span> <span class='hs-varid'>op</span> <span class='hs-varid'>ope</span><span class='hs-layout'>)</span>
<a name="line-135"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>op</span> <span class='hs-varop'>`plusPtr`</span> <span class='hs-varid'>maxSize</span> <span class='hs-varop'><=</span> <span class='hs-varid'>ope</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-136"></a> <span class='hs-varid'>op'</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>runWriteIO</span> <span class='hs-varid'>wio</span> <span class='hs-varid'>op</span>
<a name="line-137"></a> <span class='hs-keyword'>let</span> <span class='hs-varop'>!</span><span class='hs-varid'>br'</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>BufRange</span> <span class='hs-varid'>op'</span> <span class='hs-varid'>ope</span>
<a name="line-138"></a> <span class='hs-varid'>k</span> <span class='hs-varid'>br'</span>
<a name="line-139"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-varid'>bufferFull</span> <span class='hs-varid'>maxSize</span> <span class='hs-varid'>op</span> <span class='hs-layout'>(</span><span class='hs-varid'>step</span> <span class='hs-varid'>k</span><span class='hs-layout'>)</span>
<a name="line-140"></a> <span class='hs-keyword'>where</span>
<a name="line-141"></a> <span class='hs-conid'>Write</span> <span class='hs-varid'>maxSize</span> <span class='hs-varid'>wio</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>write</span> <span class='hs-varid'>x</span>
<a name="line-142"></a><span class='hs-comment'>{-# INLINE fromWriteSingleton #-}</span>
<a name="line-143"></a>
<a name="line-144"></a><a name="fromWriteList"></a><span class='hs-comment'>-- | Construct a 'Builder' writing a list of data one element at a time.</span>
<a name="line-145"></a><span class='hs-definition'>fromWriteList</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Write</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>a</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Builder</span>
<a name="line-146"></a><span class='hs-definition'>fromWriteList</span> <span class='hs-varid'>write</span> <span class='hs-keyglyph'>=</span>
<a name="line-147"></a> <span class='hs-varid'>makeBuilder</span>
<a name="line-148"></a> <span class='hs-keyword'>where</span>
<a name="line-149"></a> <span class='hs-varid'>makeBuilder</span> <span class='hs-varid'>xs0</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromBuildStepCont</span> <span class='hs-varop'>$</span> <span class='hs-varid'>step</span> <span class='hs-varid'>xs0</span>
<a name="line-150"></a> <span class='hs-keyword'>where</span>
<a name="line-151"></a> <span class='hs-varid'>step</span> <span class='hs-varid'>xs1</span> <span class='hs-varid'>k</span> <span class='hs-varop'>!</span><span class='hs-layout'>(</span><span class='hs-conid'>BufRange</span> <span class='hs-varid'>op0</span> <span class='hs-varid'>ope0</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>go</span> <span class='hs-varid'>xs1</span> <span class='hs-varid'>op0</span>
<a name="line-152"></a> <span class='hs-keyword'>where</span>
<a name="line-153"></a> <span class='hs-varid'>go</span> <span class='hs-conid'>[]</span> <span class='hs-varop'>!</span><span class='hs-varid'>op</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-154"></a> <span class='hs-keyword'>let</span> <span class='hs-varop'>!</span><span class='hs-varid'>br'</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>BufRange</span> <span class='hs-varid'>op</span> <span class='hs-varid'>ope0</span>
<a name="line-155"></a> <span class='hs-varid'>k</span> <span class='hs-varid'>br'</span>
<a name="line-156"></a>
<a name="line-157"></a> <span class='hs-varid'>go</span> <span class='hs-varid'>xs</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-varid'>x'</span><span class='hs-conop'>:</span><span class='hs-varid'>xs'</span><span class='hs-layout'>)</span> <span class='hs-varop'>!</span><span class='hs-varid'>op</span>
<a name="line-158"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>op</span> <span class='hs-varop'>`plusPtr`</span> <span class='hs-varid'>maxSize</span> <span class='hs-varop'><=</span> <span class='hs-varid'>ope0</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-159"></a> <span class='hs-varop'>!</span><span class='hs-varid'>op'</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>runWriteIO</span> <span class='hs-varid'>wio</span> <span class='hs-varid'>op</span>
<a name="line-160"></a> <span class='hs-varid'>go</span> <span class='hs-varid'>xs'</span> <span class='hs-varid'>op'</span>
<a name="line-161"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-varid'>bufferFull</span> <span class='hs-varid'>maxSize</span> <span class='hs-varid'>op</span> <span class='hs-layout'>(</span><span class='hs-varid'>step</span> <span class='hs-varid'>xs</span> <span class='hs-varid'>k</span><span class='hs-layout'>)</span>
<a name="line-162"></a> <span class='hs-keyword'>where</span>
<a name="line-163"></a> <span class='hs-conid'>Write</span> <span class='hs-varid'>maxSize</span> <span class='hs-varid'>wio</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>write</span> <span class='hs-varid'>x'</span>
<a name="line-164"></a><span class='hs-comment'>{-# INLINE fromWriteList #-}</span>
<a name="line-165"></a>
<a name="line-166"></a>
<a name="line-167"></a>
<a name="line-168"></a><span class='hs-comment'>------------------------------------------------------------------------------</span>
<a name="line-169"></a><span class='hs-comment'>-- Writing storables</span>
<a name="line-170"></a><span class='hs-comment'>------------------------------------------------------------------------------</span>
<a name="line-171"></a>
<a name="line-172"></a>
<a name="line-173"></a><a name="writeStorable"></a><span class='hs-comment'>-- | Write a storable value.</span>
<a name="line-174"></a><span class='hs-comment'>{-# INLINE writeStorable #-}</span>
<a name="line-175"></a><span class='hs-definition'>writeStorable</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'>Write</span>
<a name="line-176"></a><span class='hs-definition'>writeStorable</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>exactWrite</span> <span class='hs-layout'>(</span><span class='hs-varid'>sizeOf</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>op</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>poke</span> <span class='hs-layout'>(</span><span class='hs-varid'>castPtr</span> <span class='hs-varid'>op</span><span class='hs-layout'>)</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span>
<a name="line-177"></a>
<a name="line-178"></a><a name="fromStorable"></a><span class='hs-comment'>-- | A builder that serializes a storable value. No alignment is done.</span>
<a name="line-179"></a><span class='hs-comment'>{-# INLINE fromStorable #-}</span>
<a name="line-180"></a><span class='hs-definition'>fromStorable</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'>Builder</span>
<a name="line-181"></a><span class='hs-definition'>fromStorable</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromWriteSingleton</span> <span class='hs-varid'>writeStorable</span>
<a name="line-182"></a>
<a name="line-183"></a><a name="fromStorables"></a><span class='hs-comment'>-- | A builder that serializes a list of storable values by writing them</span>
<a name="line-184"></a><span class='hs-comment'>-- consecutively. No alignment is done. Parsing information needs to be</span>
<a name="line-185"></a><span class='hs-comment'>-- provided externally.</span>
<a name="line-186"></a><span class='hs-definition'>fromStorables</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-keyglyph'>[</span><span class='hs-varid'>a</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Builder</span>
<a name="line-187"></a><span class='hs-definition'>fromStorables</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromWriteList</span> <span class='hs-varid'>writeStorable</span>
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