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<title>Data/ByteString/Nums/Careless/Float.hs</title>
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<a name="line-3"></a><span class='hs-comment'>{-# LANGUAGE MultiParamTypeClasses
<a name="line-4"></a> , TypeSynonymInstances
<a name="line-5"></a> #-}</span>
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<a name="line-8"></a><span class='hs-keyword'>module</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'>Nums</span><span class='hs-varop'>.</span><span class='hs-conid'>Careless</span><span class='hs-varop'>.</span><span class='hs-conid'>Float</span> <span class='hs-keyword'>where</span>
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<a name="line-11"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Char</span>
<a name="line-12"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Prelude</span> <span class='hs-varid'>hiding</span> <span class='hs-layout'>(</span><span class='hs-varid'>break</span><span class='hs-layout'>,</span> <span class='hs-varid'>length</span><span class='hs-layout'>,</span> <span class='hs-varid'>null</span><span class='hs-layout'>,</span> <span class='hs-varid'>drop</span><span class='hs-layout'>,</span> <span class='hs-varid'>tail</span><span class='hs-layout'>,</span> <span class='hs-varid'>head</span><span class='hs-layout'>)</span>
<a name="line-13"></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-varid'>hiding</span> <span class='hs-layout'>(</span><span class='hs-varid'>head</span><span class='hs-layout'>,</span> <span class='hs-varid'>break</span><span class='hs-layout'>,</span> <span class='hs-varid'>pack</span><span class='hs-layout'>)</span>
<a name="line-14"></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-varid'>hiding</span> <span class='hs-layout'>(</span><span class='hs-varid'>inits</span><span class='hs-layout'>,</span> <span class='hs-varid'>elem</span><span class='hs-layout'>,</span> <span class='hs-varid'>last</span><span class='hs-layout'>,</span> <span class='hs-varid'>foldl'</span><span class='hs-layout'>)</span>
<a name="line-15"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</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'>Lazy</span><span class='hs-varop'>.</span><span class='hs-conid'>Internal</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>Lazy</span>
<a name="line-16"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</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'>Lazy</span><span class='hs-varop'>.</span><span class='hs-conid'>Char8</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>Lazy</span>
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<a name="line-19"></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'>Nums</span><span class='hs-varop'>.</span><span class='hs-conid'>Careless</span><span class='hs-varop'>.</span><span class='hs-conid'>Int</span>
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<a name="line-25"></a><a name="Floatable"></a><span class='hs-comment'>{-| Types that can be read from floating point strings. A floating point
<a name="line-26"></a> string is taken to be a string of digits with up to one comma or period
<a name="line-27"></a> mixed in with the digits.
<a name="line-28"></a> -}</span>
<a name="line-29"></a><a name="Floatable"></a><span class='hs-keyword'>class</span> <span class='hs-layout'>(</span><span class='hs-conid'>Intable</span> <span class='hs-varid'>b</span> <span class='hs-varid'>f</span><span class='hs-layout'>,</span> <span class='hs-conid'>Fractional</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Floatable</span> <span class='hs-varid'>b</span> <span class='hs-varid'>f</span> <span class='hs-keyword'>where</span>
<a name="line-30"></a> <span class='hs-varid'>float</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>f</span>
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<a name="line-32"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Floatable</span> <span class='hs-conid'>ByteString</span> <span class='hs-conid'>Float</span> <span class='hs-keyword'>where</span>
<a name="line-33"></a> <span class='hs-varid'>float</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>strict_float</span>
<a name="line-34"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Floatable</span> <span class='hs-conid'>ByteString</span> <span class='hs-conid'>Double</span> <span class='hs-keyword'>where</span>
<a name="line-35"></a> <span class='hs-varid'>float</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>strict_float</span>
<a name="line-36"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Floatable</span> <span class='hs-conid'>ByteString</span> <span class='hs-conid'>Rational</span> <span class='hs-keyword'>where</span>
<a name="line-37"></a> <span class='hs-varid'>float</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>strict_float</span>
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<a name="line-39"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Floatable</span> <span class='hs-conid'>Lazy</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-conid'>Float</span> <span class='hs-keyword'>where</span>
<a name="line-40"></a> <span class='hs-varid'>float</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>lazy_float</span>
<a name="line-41"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Floatable</span> <span class='hs-conid'>Lazy</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-conid'>Double</span> <span class='hs-keyword'>where</span>
<a name="line-42"></a> <span class='hs-varid'>float</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>lazy_float</span>
<a name="line-43"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Floatable</span> <span class='hs-conid'>Lazy</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-conid'>Rational</span> <span class='hs-keyword'>where</span>
<a name="line-44"></a> <span class='hs-varid'>float</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>lazy_float</span>
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<a name="line-49"></a><a name="strict_float"></a><span class='hs-definition'>strict_float</span> <span class='hs-varid'>bytes</span>
<a name="line-50"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>null</span> <span class='hs-varid'>bytes</span> <span class='hs-keyglyph'>=</span> <span class='hs-num'>0</span>
<a name="line-51"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>head</span> <span class='hs-varid'>bytes</span> <span class='hs-varop'>==</span> <span class='hs-chr'>'-'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>foldn</span> <span class='hs-num'>0</span> <span class='hs-layout'>(</span><span class='hs-varid'>tail</span> <span class='hs-varid'>integer</span><span class='hs-layout'>)</span> <span class='hs-varop'>+</span> <span class='hs-varid'>nfrac</span>
<a name="line-52"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>head</span> <span class='hs-varid'>bytes</span> <span class='hs-varop'>==</span> <span class='hs-chr'>'+'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>foldp</span> <span class='hs-num'>0</span> <span class='hs-layout'>(</span><span class='hs-varid'>tail</span> <span class='hs-varid'>integer</span><span class='hs-layout'>)</span> <span class='hs-varop'>+</span> <span class='hs-varid'>pfrac</span>
<a name="line-53"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>foldp</span> <span class='hs-num'>0</span> <span class='hs-varid'>integer</span> <span class='hs-varop'>+</span> <span class='hs-varid'>pfrac</span>
<a name="line-54"></a> <span class='hs-keyword'>where</span>
<a name="line-55"></a> <span class='hs-varid'>foldn</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>foldl'</span> <span class='hs-varid'>negative</span>
<a name="line-56"></a> <span class='hs-varid'>foldp</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>foldl'</span> <span class='hs-varid'>positive</span>
<a name="line-57"></a> <span class='hs-layout'>(</span><span class='hs-varid'>integer</span><span class='hs-layout'>,</span> <span class='hs-varid'>fractional</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>break</span> <span class='hs-varid'>point</span> <span class='hs-varid'>bytes</span>
<a name="line-58"></a> <span class='hs-varid'>fractional'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>tail</span> <span class='hs-varid'>fractional</span>
<a name="line-59"></a> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-num'>0.1</span> <span class='hs-varop'>^</span> <span class='hs-varid'>length</span> <span class='hs-varid'>fractional'</span>
<a name="line-60"></a> <span class='hs-varid'>nfrac</span>
<a name="line-61"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>null</span> <span class='hs-varid'>fractional</span> <span class='hs-keyglyph'>=</span> <span class='hs-num'>0</span>
<a name="line-62"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>foldn</span> <span class='hs-num'>0</span> <span class='hs-varid'>fractional'</span> <span class='hs-varop'>*</span> <span class='hs-varid'>p</span>
<a name="line-63"></a> <span class='hs-varid'>pfrac</span>
<a name="line-64"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>null</span> <span class='hs-varid'>fractional</span> <span class='hs-keyglyph'>=</span> <span class='hs-num'>0</span>
<a name="line-65"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>foldp</span> <span class='hs-num'>0</span> <span class='hs-varid'>fractional'</span> <span class='hs-varop'>*</span> <span class='hs-varid'>p</span>
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<a name="line-68"></a><a name="lazy_float"></a><span class='hs-definition'>lazy_float</span> <span class='hs-varid'>bytes</span>
<a name="line-69"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Lazy</span><span class='hs-varop'>.</span><span class='hs-varid'>null</span> <span class='hs-varid'>bytes</span> <span class='hs-keyglyph'>=</span> <span class='hs-num'>0</span>
<a name="line-70"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Lazy</span><span class='hs-varop'>.</span><span class='hs-varid'>head</span> <span class='hs-varid'>bytes</span> <span class='hs-varop'>==</span> <span class='hs-chr'>'-'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>foldn</span> <span class='hs-num'>0</span> <span class='hs-layout'>(</span><span class='hs-conid'>Lazy</span><span class='hs-varop'>.</span><span class='hs-varid'>tail</span> <span class='hs-varid'>integer</span><span class='hs-layout'>)</span> <span class='hs-varop'>+</span> <span class='hs-varid'>nfrac</span>
<a name="line-71"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Lazy</span><span class='hs-varop'>.</span><span class='hs-varid'>head</span> <span class='hs-varid'>bytes</span> <span class='hs-varop'>==</span> <span class='hs-chr'>'+'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>foldp</span> <span class='hs-num'>0</span> <span class='hs-layout'>(</span><span class='hs-conid'>Lazy</span><span class='hs-varop'>.</span><span class='hs-varid'>tail</span> <span class='hs-varid'>integer</span><span class='hs-layout'>)</span> <span class='hs-varop'>+</span> <span class='hs-varid'>pfrac</span>
<a name="line-72"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>foldp</span> <span class='hs-num'>0</span> <span class='hs-varid'>integer</span> <span class='hs-varop'>+</span> <span class='hs-varid'>pfrac</span>
<a name="line-73"></a> <span class='hs-keyword'>where</span>
<a name="line-74"></a> <span class='hs-varid'>foldn</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Lazy</span><span class='hs-varop'>.</span><span class='hs-varid'>foldlChunks</span> <span class='hs-layout'>(</span><span class='hs-varid'>foldl'</span> <span class='hs-varid'>negative</span><span class='hs-layout'>)</span>
<a name="line-75"></a> <span class='hs-varid'>foldp</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Lazy</span><span class='hs-varop'>.</span><span class='hs-varid'>foldlChunks</span> <span class='hs-layout'>(</span><span class='hs-varid'>foldl'</span> <span class='hs-varid'>positive</span><span class='hs-layout'>)</span>
<a name="line-76"></a> <span class='hs-layout'>(</span><span class='hs-varid'>integer</span><span class='hs-layout'>,</span> <span class='hs-varid'>fractional</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Lazy</span><span class='hs-varop'>.</span><span class='hs-varid'>break</span> <span class='hs-varid'>point</span> <span class='hs-varid'>bytes</span>
<a name="line-77"></a> <span class='hs-varid'>fractional'</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Lazy</span><span class='hs-varop'>.</span><span class='hs-varid'>tail</span> <span class='hs-varid'>fractional</span>
<a name="line-78"></a> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-num'>0.1</span> <span class='hs-varop'>^</span> <span class='hs-conid'>Lazy</span><span class='hs-varop'>.</span><span class='hs-varid'>length</span> <span class='hs-varid'>fractional'</span>
<a name="line-79"></a> <span class='hs-varid'>nfrac</span>
<a name="line-80"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Lazy</span><span class='hs-varop'>.</span><span class='hs-varid'>null</span> <span class='hs-varid'>fractional</span> <span class='hs-keyglyph'>=</span> <span class='hs-num'>0</span>
<a name="line-81"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>foldn</span> <span class='hs-num'>0</span> <span class='hs-varid'>fractional'</span> <span class='hs-varop'>*</span> <span class='hs-varid'>p</span>
<a name="line-82"></a> <span class='hs-varid'>pfrac</span>
<a name="line-83"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Lazy</span><span class='hs-varop'>.</span><span class='hs-varid'>null</span> <span class='hs-varid'>fractional</span> <span class='hs-keyglyph'>=</span> <span class='hs-num'>0</span>
<a name="line-84"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>foldp</span> <span class='hs-num'>0</span> <span class='hs-varid'>fractional'</span> <span class='hs-varop'>*</span> <span class='hs-varid'>p</span>
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<a name="line-86"></a>
<a name="line-87"></a><a name="point"></a><span class='hs-definition'>point</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>c</span> <span class='hs-varop'>==</span> <span class='hs-chr'>'.'</span> <span class='hs-varop'>||</span> <span class='hs-varid'>c</span> <span class='hs-varop'>==</span> <span class='hs-chr'>','</span>
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