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<pre><a name="line-1"></a><span class='hs-comment'>{-# LANGUAGE BangPatterns, CPP, MagicHash, OverloadedStrings, UnboxedTuples #-}</span>
<a name="line-2"></a>
<a name="line-3"></a><span class='hs-comment'>-- Module: Blaze.Text.Int</span>
<a name="line-4"></a><span class='hs-comment'>-- Copyright: (c) 2011 MailRank, Inc.</span>
<a name="line-5"></a><span class='hs-comment'>-- License: BSD3</span>
<a name="line-6"></a><span class='hs-comment'>-- Maintainer: Bryan O'Sullivan <bos@serpentine.com></span>
<a name="line-7"></a><span class='hs-comment'>-- Stability: experimental</span>
<a name="line-8"></a><span class='hs-comment'>-- Portability: portable</span>
<a name="line-9"></a><span class='hs-comment'>--</span>
<a name="line-10"></a><span class='hs-comment'>-- Efficiently serialize an integral value as a lazy 'L.ByteString'.</span>
<a name="line-11"></a>
<a name="line-12"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>Blaze</span><span class='hs-varop'>.</span><span class='hs-conid'>Text</span><span class='hs-varop'>.</span><span class='hs-conid'>Int</span>
<a name="line-13"></a> <span class='hs-layout'>(</span>
<a name="line-14"></a> <span class='hs-varid'>digit</span>
<a name="line-15"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>integral</span>
<a name="line-16"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>minus</span>
<a name="line-17"></a> <span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-18"></a>
<a name="line-19"></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>
<a name="line-20"></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'>Char8</span>
<a name="line-21"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span><span class='hs-varop'>.</span><span class='hs-conid'>Char8</span> <span class='hs-conid'>()</span>
<a name="line-22"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Int</span> <span class='hs-layout'>(</span><span class='hs-conid'>Int8</span><span class='hs-layout'>,</span> <span class='hs-conid'>Int16</span><span class='hs-layout'>,</span> <span class='hs-conid'>Int32</span><span class='hs-layout'>,</span> <span class='hs-conid'>Int64</span><span class='hs-layout'>)</span>
<a name="line-23"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Monoid</span> <span class='hs-layout'>(</span><span class='hs-varid'>mappend</span><span class='hs-layout'>,</span> <span class='hs-varid'>mempty</span><span class='hs-layout'>)</span>
<a name="line-24"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Word</span> <span class='hs-layout'>(</span><span class='hs-conid'>Word</span><span class='hs-layout'>,</span> <span class='hs-conid'>Word8</span><span class='hs-layout'>,</span> <span class='hs-conid'>Word16</span><span class='hs-layout'>,</span> <span class='hs-conid'>Word32</span><span class='hs-layout'>,</span> <span class='hs-conid'>Word64</span><span class='hs-layout'>)</span>
<a name="line-25"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>GHC</span><span class='hs-varop'>.</span><span class='hs-conid'>Base</span> <span class='hs-layout'>(</span><span class='hs-varid'>quotInt</span><span class='hs-layout'>,</span> <span class='hs-varid'>remInt</span><span class='hs-layout'>)</span>
<a name="line-26"></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-varid'>quotRemInteger</span><span class='hs-layout'>)</span>
<a name="line-27"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>GHC</span><span class='hs-varop'>.</span><span class='hs-conid'>Types</span> <span class='hs-layout'>(</span><span class='hs-conid'>Int</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-28"></a>
<a name="line-29"></a><span class='hs-cpp'>#if defined(INTEGER_GMP)</span>
<a name="line-30"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>GHC</span><span class='hs-varop'>.</span><span class='hs-conid'>Integer</span><span class='hs-varop'>.</span><span class='hs-conid'>GMP</span><span class='hs-varop'>.</span><span class='hs-conid'>Internals</span>
<a name="line-31"></a><span class='hs-cpp'>#elif defined(INTEGER_SIMPLE)</span>
<a name="line-32"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>GHC</span><span class='hs-varop'>.</span><span class='hs-conid'>Integer</span><span class='hs-varop'>.</span><span class='hs-conid'>Simple</span><span class='hs-varop'>.</span><span class='hs-conid'>Internals</span>
<a name="line-33"></a><span class='hs-cpp'>#endif</span>
<a name="line-34"></a>
<a name="line-35"></a><span class='hs-cpp'>#define PAIR(a,b) (# a,b #)</span>
<a name="line-36"></a>
<a name="line-37"></a><a name="integral"></a><span class='hs-definition'>integral</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Integral</span> <span class='hs-varid'>a</span><span class='hs-layout'>,</span> <span class='hs-conid'>Show</span> <span class='hs-varid'>a</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-38"></a><span class='hs-comment'>{-# RULES "integral/Int" integral = bounded :: Int -> Builder #-}</span>
<a name="line-39"></a><span class='hs-comment'>{-# RULES "integral/Int8" integral = bounded :: Int8 -> Builder #-}</span>
<a name="line-40"></a><span class='hs-comment'>{-# RULES "integral/Int16" integral = bounded :: Int16 -> Builder #-}</span>
<a name="line-41"></a><span class='hs-comment'>{-# RULES "integral/Int32" integral = bounded :: Int32 -> Builder #-}</span>
<a name="line-42"></a><span class='hs-comment'>{-# RULES "integral/Int64" integral = bounded :: Int64 -> Builder #-}</span>
<a name="line-43"></a><span class='hs-comment'>{-# RULES "integral/Word" integral = nonNegative :: Word -> Builder #-}</span>
<a name="line-44"></a><span class='hs-comment'>{-# RULES "integral/Word8" integral = nonNegative :: Word8 -> Builder #-}</span>
<a name="line-45"></a><span class='hs-comment'>{-# RULES "integral/Word16" integral = nonNegative :: Word16 -> Builder #-}</span>
<a name="line-46"></a><span class='hs-comment'>{-# RULES "integral/Word32" integral = nonNegative :: Word32 -> Builder #-}</span>
<a name="line-47"></a><span class='hs-comment'>{-# RULES "integral/Word64" integral = nonNegative :: Word64 -> Builder #-}</span>
<a name="line-48"></a><span class='hs-comment'>{-# RULES "integral/Integer" integral = integer :: Integer -> Builder #-}</span>
<a name="line-49"></a>
<a name="line-50"></a><span class='hs-comment'>-- This definition of the function is here PURELY to be used by ghci</span>
<a name="line-51"></a><span class='hs-comment'>-- and those rare cases where GHC is being invoked without</span>
<a name="line-52"></a><span class='hs-comment'>-- optimization, as otherwise the rewrite rules above should fire. The</span>
<a name="line-53"></a><span class='hs-comment'>-- test for "-0" catches an overflow if we render minBound.</span>
<a name="line-54"></a><span class='hs-definition'>integral</span> <span class='hs-varid'>i</span>
<a name="line-55"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>i</span> <span class='hs-varop'>>=</span> <span class='hs-num'>0</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>nonNegative</span> <span class='hs-varid'>i</span>
<a name="line-56"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>toByteString</span> <span class='hs-varid'>b</span> <span class='hs-varop'>==</span> <span class='hs-str'>"-0"</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromString</span> <span class='hs-layout'>(</span><span class='hs-varid'>show</span> <span class='hs-varid'>i</span><span class='hs-layout'>)</span>
<a name="line-57"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>b</span>
<a name="line-58"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>minus</span> <span class='hs-varop'>`mappend`</span> <span class='hs-varid'>nonNegative</span> <span class='hs-layout'>(</span><span class='hs-comment'>-</span><span class='hs-varid'>i</span><span class='hs-layout'>)</span>
<a name="line-59"></a><span class='hs-comment'>{-# NOINLINE integral #-}</span>
<a name="line-60"></a>
<a name="line-61"></a><a name="bounded"></a><span class='hs-definition'>bounded</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Bounded</span> <span class='hs-varid'>a</span><span class='hs-layout'>,</span> <span class='hs-conid'>Integral</span> <span class='hs-varid'>a</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-62"></a><span class='hs-comment'>{-# SPECIALIZE bounded :: Int -> Builder #-}</span>
<a name="line-63"></a><span class='hs-comment'>{-# SPECIALIZE bounded :: Int8 -> Builder #-}</span>
<a name="line-64"></a><span class='hs-comment'>{-# SPECIALIZE bounded :: Int16 -> Builder #-}</span>
<a name="line-65"></a><span class='hs-comment'>{-# SPECIALIZE bounded :: Int32 -> Builder #-}</span>
<a name="line-66"></a><span class='hs-comment'>{-# SPECIALIZE bounded :: Int64 -> Builder #-}</span>
<a name="line-67"></a><span class='hs-definition'>bounded</span> <span class='hs-varid'>i</span>
<a name="line-68"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>i</span> <span class='hs-varop'>>=</span> <span class='hs-num'>0</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>nonNegative</span> <span class='hs-varid'>i</span>
<a name="line-69"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>i</span> <span class='hs-varop'>></span> <span class='hs-varid'>minBound</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>minus</span> <span class='hs-varop'>`mappend`</span> <span class='hs-varid'>nonNegative</span> <span class='hs-layout'>(</span><span class='hs-comment'>-</span><span class='hs-varid'>i</span><span class='hs-layout'>)</span>
<a name="line-70"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>minus</span> <span class='hs-varop'>`mappend`</span>
<a name="line-71"></a> <span class='hs-varid'>nonNegative</span> <span class='hs-layout'>(</span><span class='hs-varid'>negate</span> <span class='hs-layout'>(</span><span class='hs-varid'>k</span> <span class='hs-varop'>`quot`</span> <span class='hs-num'>10</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varop'>`mappend`</span>
<a name="line-72"></a> <span class='hs-varid'>digit</span> <span class='hs-layout'>(</span><span class='hs-varid'>negate</span> <span class='hs-layout'>(</span><span class='hs-varid'>k</span> <span class='hs-varop'>`rem`</span> <span class='hs-num'>10</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-73"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>k</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>minBound</span> <span class='hs-varop'>`asTypeOf`</span> <span class='hs-varid'>i</span>
<a name="line-74"></a>
<a name="line-75"></a><a name="nonNegative"></a><span class='hs-definition'>nonNegative</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Integral</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-76"></a><span class='hs-comment'>{-# SPECIALIZE nonNegative :: Int -> Builder #-}</span>
<a name="line-77"></a><span class='hs-comment'>{-# SPECIALIZE nonNegative :: Int8 -> Builder #-}</span>
<a name="line-78"></a><span class='hs-comment'>{-# SPECIALIZE nonNegative :: Int16 -> Builder #-}</span>
<a name="line-79"></a><span class='hs-comment'>{-# SPECIALIZE nonNegative :: Int32 -> Builder #-}</span>
<a name="line-80"></a><span class='hs-comment'>{-# SPECIALIZE nonNegative :: Int64 -> Builder #-}</span>
<a name="line-81"></a><span class='hs-comment'>{-# SPECIALIZE nonNegative :: Word -> Builder #-}</span>
<a name="line-82"></a><span class='hs-comment'>{-# SPECIALIZE nonNegative :: Word8 -> Builder #-}</span>
<a name="line-83"></a><span class='hs-comment'>{-# SPECIALIZE nonNegative :: Word16 -> Builder #-}</span>
<a name="line-84"></a><span class='hs-comment'>{-# SPECIALIZE nonNegative :: Word32 -> Builder #-}</span>
<a name="line-85"></a><span class='hs-comment'>{-# SPECIALIZE nonNegative :: Word64 -> Builder #-}</span>
<a name="line-86"></a><span class='hs-definition'>nonNegative</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>go</span>
<a name="line-87"></a> <span class='hs-keyword'>where</span>
<a name="line-88"></a> <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-num'>10</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>digit</span> <span class='hs-varid'>n</span>
<a name="line-89"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>go</span> <span class='hs-layout'>(</span><span class='hs-varid'>n</span> <span class='hs-varop'>`quot`</span> <span class='hs-num'>10</span><span class='hs-layout'>)</span> <span class='hs-varop'>`mappend`</span> <span class='hs-varid'>digit</span> <span class='hs-layout'>(</span><span class='hs-varid'>n</span> <span class='hs-varop'>`rem`</span> <span class='hs-num'>10</span><span class='hs-layout'>)</span>
<a name="line-90"></a>
<a name="line-91"></a><a name="digit"></a><span class='hs-definition'>digit</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Integral</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-92"></a><span class='hs-definition'>digit</span> <span class='hs-varid'>n</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromWord8</span> <span class='hs-varop'>$!</span> <span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>n</span> <span class='hs-varop'>+</span> <span class='hs-num'>48</span>
<a name="line-93"></a><span class='hs-comment'>{-# INLINE digit #-}</span>
<a name="line-94"></a>
<a name="line-95"></a><a name="minus"></a><span class='hs-definition'>minus</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Builder</span>
<a name="line-96"></a><span class='hs-definition'>minus</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromWord8</span> <span class='hs-num'>45</span>
<a name="line-97"></a>
<a name="line-98"></a><a name="int"></a><span class='hs-definition'>int</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Builder</span>
<a name="line-99"></a><span class='hs-definition'>int</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>integral</span>
<a name="line-100"></a><span class='hs-comment'>{-# INLINE int #-}</span>
<a name="line-101"></a>
<a name="line-102"></a><a name="integer"></a><span class='hs-definition'>integer</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Integer</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Builder</span>
<a name="line-103"></a><span class='hs-cpp'>#if defined(INTEGER_GMP)</span>
<a name="line-104"></a><span class='hs-definition'>integer</span> <span class='hs-layout'>(</span><span class='hs-conid'>S</span><span class='hs-cpp'>#</span> <span class='hs-varid'>i</span><span class='hs-cpp'>#</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>int</span> <span class='hs-layout'>(</span><span class='hs-conid'>I</span><span class='hs-cpp'>#</span> <span class='hs-varid'>i</span><span class='hs-cpp'>#</span><span class='hs-layout'>)</span>
<a name="line-105"></a><span class='hs-cpp'>#endif</span>
<a name="line-106"></a><span class='hs-definition'>integer</span> <span class='hs-varid'>i</span>
<a name="line-107"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>i</span> <span class='hs-varop'><</span> <span class='hs-num'>0</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>minus</span> <span class='hs-varop'>`mappend`</span> <span class='hs-varid'>go</span> <span class='hs-layout'>(</span><span class='hs-comment'>-</span><span class='hs-varid'>i</span><span class='hs-layout'>)</span>
<a name="line-108"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>go</span> <span class='hs-varid'>i</span>
<a name="line-109"></a> <span class='hs-keyword'>where</span>
<a name="line-110"></a> <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'>maxInt</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>int</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromInteger</span> <span class='hs-varid'>n</span><span class='hs-layout'>)</span>
<a name="line-111"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>putH</span> <span class='hs-layout'>(</span><span class='hs-varid'>splitf</span> <span class='hs-layout'>(</span><span class='hs-varid'>maxInt</span> <span class='hs-varop'>*</span> <span class='hs-varid'>maxInt</span><span class='hs-layout'>)</span> <span class='hs-varid'>n</span><span class='hs-layout'>)</span>
<a name="line-112"></a>
<a name="line-113"></a> <span class='hs-varid'>splitf</span> <span class='hs-varid'>p</span> <span class='hs-varid'>n</span>
<a name="line-114"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>p</span> <span class='hs-varop'>></span> <span class='hs-varid'>n</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>n</span><span class='hs-keyglyph'>]</span>
<a name="line-115"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>splith</span> <span class='hs-varid'>p</span> <span class='hs-layout'>(</span><span class='hs-varid'>splitf</span> <span class='hs-layout'>(</span><span class='hs-varid'>p</span><span class='hs-varop'>*</span><span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-varid'>n</span><span class='hs-layout'>)</span>
<a name="line-116"></a>
<a name="line-117"></a> <span class='hs-varid'>splith</span> <span class='hs-varid'>p</span> <span class='hs-layout'>(</span><span class='hs-varid'>n</span><span class='hs-conop'>:</span><span class='hs-varid'>ns</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>n</span> <span class='hs-varop'>`quotRemInteger`</span> <span class='hs-varid'>p</span> <span class='hs-keyword'>of</span>
<a name="line-118"></a> <span class='hs-conid'>PAIR</span><span class='hs-layout'>(</span><span class='hs-varid'>q</span><span class='hs-layout'>,</span><span class='hs-varid'>r</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>q</span> <span class='hs-varop'>></span> <span class='hs-num'>0</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>q</span> <span class='hs-conop'>:</span> <span class='hs-varid'>r</span> <span class='hs-conop'>:</span> <span class='hs-varid'>splitb</span> <span class='hs-varid'>p</span> <span class='hs-varid'>ns</span>
<a name="line-119"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>r</span> <span class='hs-conop'>:</span> <span class='hs-varid'>splitb</span> <span class='hs-varid'>p</span> <span class='hs-varid'>ns</span>
<a name="line-120"></a> <span class='hs-varid'>splith</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>error</span> <span class='hs-str'>"splith: the impossible happened."</span>
<a name="line-121"></a>
<a name="line-122"></a> <span class='hs-varid'>splitb</span> <span class='hs-varid'>p</span> <span class='hs-layout'>(</span><span class='hs-varid'>n</span><span class='hs-conop'>:</span><span class='hs-varid'>ns</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>n</span> <span class='hs-varop'>`quotRemInteger`</span> <span class='hs-varid'>p</span> <span class='hs-keyword'>of</span>
<a name="line-123"></a> <span class='hs-conid'>PAIR</span><span class='hs-layout'>(</span><span class='hs-varid'>q</span><span class='hs-layout'>,</span><span class='hs-varid'>r</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>q</span> <span class='hs-conop'>:</span> <span class='hs-varid'>r</span> <span class='hs-conop'>:</span> <span class='hs-varid'>splitb</span> <span class='hs-varid'>p</span> <span class='hs-varid'>ns</span>
<a name="line-124"></a> <span class='hs-varid'>splitb</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>[]</span>
<a name="line-125"></a>
<a name="line-126"></a><a name="T"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>T</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>T</span> <span class='hs-varop'>!</span><span class='hs-conid'>Integer</span> <span class='hs-varop'>!</span><span class='hs-conid'>Int</span>
<a name="line-127"></a>
<a name="line-128"></a><a name="fstT"></a><span class='hs-definition'>fstT</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>T</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Integer</span>
<a name="line-129"></a><span class='hs-definition'>fstT</span> <span class='hs-layout'>(</span><span class='hs-conid'>T</span> <span class='hs-varid'>a</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>a</span>
<a name="line-130"></a>
<a name="line-131"></a><a name="maxInt"></a><span class='hs-definition'>maxInt</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Integer</span>
<a name="line-132"></a><a name="maxDigits"></a><span class='hs-definition'>maxDigits</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int</span>
<a name="line-133"></a><span class='hs-conid'>T</span> <span class='hs-varid'>maxInt</span> <span class='hs-varid'>maxDigits</span> <span class='hs-keyglyph'>=</span>
<a name="line-134"></a> <span class='hs-varid'>until</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varop'>></span><span class='hs-varid'>mi</span><span class='hs-layout'>)</span> <span class='hs-varop'>.</span> <span class='hs-layout'>(</span><span class='hs-varop'>*</span><span class='hs-num'>10</span><span class='hs-layout'>)</span> <span class='hs-varop'>.</span> <span class='hs-varid'>fstT</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-layout'>(</span><span class='hs-conid'>T</span> <span class='hs-varid'>n</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>T</span> <span class='hs-layout'>(</span><span class='hs-varid'>n</span><span class='hs-varop'>*</span><span class='hs-num'>10</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>d</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><span class='hs-conid'>T</span> <span class='hs-num'>10</span> <span class='hs-num'>1</span><span class='hs-layout'>)</span>
<a name="line-135"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>mi</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromIntegral</span> <span class='hs-layout'>(</span><span class='hs-varid'>maxBound</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int</span><span class='hs-layout'>)</span>
<a name="line-136"></a>
<a name="line-137"></a><a name="putH"></a><span class='hs-definition'>putH</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Integer</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Builder</span>
<a name="line-138"></a><span class='hs-definition'>putH</span> <span class='hs-layout'>(</span><span class='hs-varid'>n</span><span class='hs-conop'>:</span><span class='hs-varid'>ns</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>n</span> <span class='hs-varop'>`quotRemInteger`</span> <span class='hs-varid'>maxInt</span> <span class='hs-keyword'>of</span>
<a name="line-139"></a> <span class='hs-conid'>PAIR</span><span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-layout'>,</span><span class='hs-varid'>y</span><span class='hs-layout'>)</span>
<a name="line-140"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>q</span> <span class='hs-varop'>></span> <span class='hs-num'>0</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>int</span> <span class='hs-varid'>q</span> <span class='hs-varop'>`mappend`</span> <span class='hs-varid'>pblock</span> <span class='hs-varid'>r</span> <span class='hs-varop'>`mappend`</span> <span class='hs-varid'>putB</span> <span class='hs-varid'>ns</span>
<a name="line-141"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>int</span> <span class='hs-varid'>r</span> <span class='hs-varop'>`mappend`</span> <span class='hs-varid'>putB</span> <span class='hs-varid'>ns</span>
<a name="line-142"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>q</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromInteger</span> <span class='hs-varid'>x</span>
<a name="line-143"></a> <span class='hs-varid'>r</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromInteger</span> <span class='hs-varid'>y</span>
<a name="line-144"></a><span class='hs-definition'>putH</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>error</span> <span class='hs-str'>"putH: the impossible happened"</span>
<a name="line-145"></a>
<a name="line-146"></a><a name="putB"></a><span class='hs-definition'>putB</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Integer</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Builder</span>
<a name="line-147"></a><span class='hs-definition'>putB</span> <span class='hs-layout'>(</span><span class='hs-varid'>n</span><span class='hs-conop'>:</span><span class='hs-varid'>ns</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>n</span> <span class='hs-varop'>`quotRemInteger`</span> <span class='hs-varid'>maxInt</span> <span class='hs-keyword'>of</span>
<a name="line-148"></a> <span class='hs-conid'>PAIR</span><span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-layout'>,</span><span class='hs-varid'>y</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>pblock</span> <span class='hs-varid'>q</span> <span class='hs-varop'>`mappend`</span> <span class='hs-varid'>pblock</span> <span class='hs-varid'>r</span> <span class='hs-varop'>`mappend`</span> <span class='hs-varid'>putB</span> <span class='hs-varid'>ns</span>
<a name="line-149"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>q</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromInteger</span> <span class='hs-varid'>x</span>
<a name="line-150"></a> <span class='hs-varid'>r</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromInteger</span> <span class='hs-varid'>y</span>
<a name="line-151"></a><span class='hs-definition'>putB</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>mempty</span>
<a name="line-152"></a>
<a name="line-153"></a><a name="pblock"></a><span class='hs-definition'>pblock</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Builder</span>
<a name="line-154"></a><span class='hs-definition'>pblock</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>go</span> <span class='hs-varid'>maxDigits</span>
<a name="line-155"></a> <span class='hs-keyword'>where</span>
<a name="line-156"></a> <span class='hs-varid'>go</span> <span class='hs-varop'>!</span><span class='hs-varid'>d</span> <span class='hs-varop'>!</span><span class='hs-varid'>n</span>
<a name="line-157"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>d</span> <span class='hs-varop'>==</span> <span class='hs-num'>1</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>digit</span> <span class='hs-varid'>n</span>
<a name="line-158"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>go</span> <span class='hs-layout'>(</span><span class='hs-varid'>d</span><span class='hs-comment'>-</span><span class='hs-num'>1</span><span class='hs-layout'>)</span> <span class='hs-varid'>q</span> <span class='hs-varop'>`mappend`</span> <span class='hs-varid'>digit</span> <span class='hs-varid'>r</span>
<a name="line-159"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>q</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>n</span> <span class='hs-varop'>`quotInt`</span> <span class='hs-num'>10</span>
<a name="line-160"></a> <span class='hs-varid'>r</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>n</span> <span class='hs-varop'>`remInt`</span> <span class='hs-num'>10</span>
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