<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html> <head> <!-- Generated by HsColour, http://www.cs.york.ac.uk/fp/darcs/hscolour/ --> <title>hs/Data/Enumerator/Binary.hs</title> <link type='text/css' rel='stylesheet' href='hscolour.css' /> </head> <body> <pre><a name="line-1"></a> <a name="line-2"></a> <a name="line-3"></a><span class='hs-comment'>-----------------------------------------------------------------------------</span> <a name="line-4"></a><span class='hs-comment'>-- |</span> <a name="line-5"></a><span class='hs-comment'>-- Module: Data.Enumerator.Binary</span> <a name="line-6"></a><span class='hs-comment'>-- Copyright: 2010 John Millikin</span> <a name="line-7"></a><span class='hs-comment'>-- License: MIT</span> <a name="line-8"></a><span class='hs-comment'>--</span> <a name="line-9"></a><span class='hs-comment'>-- Maintainer: jmillikin@gmail.com</span> <a name="line-10"></a><span class='hs-comment'>-- Portability: portable</span> <a name="line-11"></a><span class='hs-comment'>--</span> <a name="line-12"></a><span class='hs-comment'>-- Byte-oriented alternatives to "Data.Enumerator.List". Note that the</span> <a name="line-13"></a><span class='hs-comment'>-- enumeratees in this module must unpack their inputs to work properly. If</span> <a name="line-14"></a><span class='hs-comment'>-- you do not need to handle leftover input on a byte-by-byte basis, the</span> <a name="line-15"></a><span class='hs-comment'>-- chunk-oriented versions will be much faster.</span> <a name="line-16"></a><span class='hs-comment'>--</span> <a name="line-17"></a><span class='hs-comment'>-- This module is intended to be imported qualified:</span> <a name="line-18"></a><span class='hs-comment'>--</span> <a name="line-19"></a><span class='hs-comment'>-- @</span> <a name="line-20"></a><span class='hs-comment'>-- import qualified Data.Enumerator.Binary as EB</span> <a name="line-21"></a><span class='hs-comment'>-- @</span> <a name="line-22"></a><span class='hs-comment'>--</span> <a name="line-23"></a><span class='hs-comment'>-- Since: 0.4.5</span> <a name="line-24"></a><span class='hs-comment'>--</span> <a name="line-25"></a><span class='hs-comment'>-----------------------------------------------------------------------------</span> <a name="line-26"></a> <a name="line-27"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Enumerator</span><span class='hs-varop'>.</span><span class='hs-conid'>Binary</span> <span class='hs-layout'>(</span> <a name="line-28"></a> <a name="line-29"></a> <span class='hs-comment'>-- * IO</span> <a name="line-30"></a> <span class='hs-varid'>enumHandle</span> <a name="line-31"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>enumHandleRange</span> <a name="line-32"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>enumFile</span> <a name="line-33"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>enumFileRange</span> <a name="line-34"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>iterHandle</span> <a name="line-35"></a> <a name="line-36"></a> <span class='hs-comment'>-- * List analogues</span> <a name="line-37"></a> <a name="line-38"></a> <span class='hs-comment'>-- ** Folds</span> <a name="line-39"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>fold</span> <a name="line-40"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>foldM</span> <a name="line-41"></a> <a name="line-42"></a> <span class='hs-comment'>-- ** Maps</span> <a name="line-43"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Enumerator</span><span class='hs-varop'>.</span><span class='hs-conid'>Binary</span><span class='hs-varop'>.</span><span class='hs-varid'>map</span> <a name="line-44"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Enumerator</span><span class='hs-varop'>.</span><span class='hs-conid'>Binary</span><span class='hs-varop'>.</span><span class='hs-varid'>mapM</span> <a name="line-45"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Enumerator</span><span class='hs-varop'>.</span><span class='hs-conid'>Binary</span><span class='hs-varop'>.</span><span class='hs-varid'>mapM_</span> <a name="line-46"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Enumerator</span><span class='hs-varop'>.</span><span class='hs-conid'>Binary</span><span class='hs-varop'>.</span><span class='hs-varid'>concatMap</span> <a name="line-47"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>concatMapM</span> <a name="line-48"></a> <a name="line-49"></a> <span class='hs-comment'>-- ** Accumulating maps</span> <a name="line-50"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>mapAccum</span> <a name="line-51"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>mapAccumM</span> <a name="line-52"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>concatMapAccum</span> <a name="line-53"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>concatMapAccumM</span> <a name="line-54"></a> <a name="line-55"></a> <span class='hs-comment'>-- ** Infinite streams</span> <a name="line-56"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Enumerator</span><span class='hs-varop'>.</span><span class='hs-conid'>Binary</span><span class='hs-varop'>.</span><span class='hs-varid'>iterate</span> <a name="line-57"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>iterateM</span> <a name="line-58"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Enumerator</span><span class='hs-varop'>.</span><span class='hs-conid'>Binary</span><span class='hs-varop'>.</span><span class='hs-varid'>repeat</span> <a name="line-59"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>repeatM</span> <a name="line-60"></a> <a name="line-61"></a> <span class='hs-comment'>-- ** Bounded streams</span> <a name="line-62"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Enumerator</span><span class='hs-varop'>.</span><span class='hs-conid'>Binary</span><span class='hs-varop'>.</span><span class='hs-varid'>replicate</span> <a name="line-63"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>replicateM</span> <a name="line-64"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>generateM</span> <a name="line-65"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>unfold</span> <a name="line-66"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>unfoldM</span> <a name="line-67"></a> <a name="line-68"></a> <span class='hs-comment'>-- ** Filters</span> <a name="line-69"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Enumerator</span><span class='hs-varop'>.</span><span class='hs-conid'>Binary</span><span class='hs-varop'>.</span><span class='hs-varid'>filter</span> <a name="line-70"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>filterM</span> <a name="line-71"></a> <a name="line-72"></a> <span class='hs-comment'>-- ** Consumers</span> <a name="line-73"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Enumerator</span><span class='hs-varop'>.</span><span class='hs-conid'>Binary</span><span class='hs-varop'>.</span><span class='hs-varid'>take</span> <a name="line-74"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>takeWhile</span> <a name="line-75"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>consume</span> <a name="line-76"></a> <a name="line-77"></a> <span class='hs-comment'>-- ** Unsorted</span> <a name="line-78"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Enumerator</span><span class='hs-varop'>.</span><span class='hs-conid'>Binary</span><span class='hs-varop'>.</span><span class='hs-varid'>head</span> <a name="line-79"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Enumerator</span><span class='hs-varop'>.</span><span class='hs-conid'>Binary</span><span class='hs-varop'>.</span><span class='hs-varid'>drop</span> <a name="line-80"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Enumerator</span><span class='hs-varop'>.</span><span class='hs-conid'>Binary</span><span class='hs-varop'>.</span><span class='hs-varid'>dropWhile</span> <a name="line-81"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>require</span> <a name="line-82"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>isolate</span> <a name="line-83"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>splitWhen</span> <a name="line-84"></a> <a name="line-85"></a> <a name="line-86"></a> <span class='hs-layout'>)</span> <span class='hs-keyword'>where</span> <a name="line-87"></a> <a name="line-88"></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'>head</span><span class='hs-layout'>,</span> <span class='hs-varid'>drop</span><span class='hs-layout'>,</span> <span class='hs-varid'>takeWhile</span><span class='hs-layout'>,</span> <span class='hs-varid'>mapM_</span><span class='hs-layout'>)</span> <a name="line-89"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Enumerator</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'>drop</span><span class='hs-layout'>,</span> <span class='hs-varid'>iterateM</span><span class='hs-layout'>,</span> <span class='hs-varid'>repeatM</span><span class='hs-layout'>,</span> <span class='hs-varid'>replicateM</span> <a name="line-90"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>generateM</span><span class='hs-layout'>,</span> <span class='hs-varid'>filterM</span><span class='hs-layout'>,</span> <span class='hs-varid'>consume</span><span class='hs-layout'>,</span> <span class='hs-varid'>foldM</span> <a name="line-91"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>concatMapM</span><span class='hs-layout'>)</span> <a name="line-92"></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-varop'>.</span><span class='hs-conid'>IO</span><span class='hs-varop'>.</span><span class='hs-conid'>Class</span> <span class='hs-layout'>(</span><span class='hs-conid'>MonadIO</span><span class='hs-layout'>)</span> <a name="line-93"></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-keyword'>as</span> <span class='hs-conid'>B</span> <a name="line-94"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>IO</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>IO</span> <a name="line-95"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Exception</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>Exc</span> <a name="line-96"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>IO</span><span class='hs-varop'>.</span><span class='hs-conid'>Error</span> <span class='hs-layout'>(</span><span class='hs-varid'>isEOFError</span><span class='hs-layout'>)</span> <a name="line-97"></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'>Word8</span><span class='hs-layout'>)</span> <a name="line-98"></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'>Enumerator</span><span class='hs-varop'>.</span><span class='hs-conid'>List</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>EL</span> <a name="line-99"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Monad</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>CM</span> <a name="line-100"></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-keyword'>as</span> <span class='hs-conid'>BL</span> <a name="line-101"></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-varop'>.</span><span class='hs-conid'>Trans</span><span class='hs-varop'>.</span><span class='hs-conid'>Class</span> <span class='hs-layout'>(</span><span class='hs-varid'>lift</span><span class='hs-layout'>)</span> <a name="line-102"></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-layout'>(</span><span class='hs-varid'>liftM</span><span class='hs-layout'>)</span> <a name="line-103"></a> <a name="line-104"></a> <a name="line-105"></a> <a name="line-106"></a><span class='hs-comment'>-- | Consume the entire input stream with a strict left fold, one byte</span> <a name="line-107"></a><span class='hs-comment'>-- at a time.</span> <a name="line-108"></a><span class='hs-comment'>--</span> <a name="line-109"></a><span class='hs-comment'>-- Since: 0.4.8</span> <a name="line-110"></a> <a name="line-111"></a><a name="fold"></a><span class='hs-definition'>fold</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Monad</span> <span class='hs-varid'>m</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'>Word8</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>b</span> <a name="line-112"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Iteratee</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-varid'>m</span> <span class='hs-varid'>b</span> <a name="line-113"></a><span class='hs-definition'>fold</span> <span class='hs-varid'>step</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>EL</span><span class='hs-varop'>.</span><span class='hs-varid'>fold</span> <span class='hs-layout'>(</span><span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-varid'>foldl'</span> <span class='hs-varid'>step</span><span class='hs-layout'>)</span> <a name="line-114"></a> <a name="line-115"></a> <a name="line-116"></a><span class='hs-comment'>-- | Consume the entire input stream with a strict monadic left fold, one</span> <a name="line-117"></a><span class='hs-comment'>-- byte at a time.</span> <a name="line-118"></a><span class='hs-comment'>--</span> <a name="line-119"></a><span class='hs-comment'>-- Since: 0.4.8</span> <a name="line-120"></a> <a name="line-121"></a><a name="foldM"></a><span class='hs-definition'>foldM</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Monad</span> <span class='hs-varid'>m</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'>Word8</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>m</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>b</span> <a name="line-122"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Iteratee</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-varid'>m</span> <span class='hs-varid'>b</span> <a name="line-123"></a><span class='hs-definition'>foldM</span> <span class='hs-varid'>step</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>EL</span><span class='hs-varop'>.</span><span class='hs-varid'>foldM</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>b</span> <span class='hs-varid'>bytes</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>CM</span><span class='hs-varop'>.</span><span class='hs-varid'>foldM</span> <span class='hs-varid'>step</span> <span class='hs-varid'>b</span> <span class='hs-layout'>(</span><span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-varid'>unpack</span> <span class='hs-varid'>bytes</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <a name="line-124"></a> <a name="line-125"></a> <a name="line-126"></a><span class='hs-comment'>-- | Enumerates a stream of bytes by repeatedly applying a function to</span> <a name="line-127"></a><span class='hs-comment'>-- some state.</span> <a name="line-128"></a><span class='hs-comment'>--</span> <a name="line-129"></a><span class='hs-comment'>-- Similar to 'iterate'.</span> <a name="line-130"></a><span class='hs-comment'>--</span> <a name="line-131"></a><span class='hs-comment'>-- Since: 0.4.8</span> <a name="line-132"></a> <a name="line-133"></a><a name="unfold"></a><span class='hs-definition'>unfold</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Monad</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=></span> <span class='hs-layout'>(</span><span class='hs-varid'>s</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-layout'>(</span><span class='hs-conid'>Word8</span><span class='hs-layout'>,</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Enumerator</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-varid'>m</span> <span class='hs-varid'>b</span> <a name="line-134"></a><span class='hs-definition'>unfold</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>checkContinue1</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>loop</span> <span class='hs-varid'>s</span> <span class='hs-varid'>k</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>case</span> <span class='hs-varid'>f</span> <span class='hs-varid'>s</span> <span class='hs-keyword'>of</span> <a name="line-135"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>continue</span> <span class='hs-varid'>k</span> <a name="line-136"></a> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-varid'>b</span><span class='hs-layout'>,</span> <span class='hs-varid'>s'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>k</span> <span class='hs-layout'>(</span><span class='hs-conid'>Chunks</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-varid'>singleton</span> <span class='hs-varid'>b</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span> <span class='hs-varop'>>>==</span> <span class='hs-varid'>loop</span> <span class='hs-varid'>s'</span> <a name="line-137"></a> <a name="line-138"></a> <a name="line-139"></a><span class='hs-comment'>-- | Enumerates a stream of bytes by repeatedly applying a computation to</span> <a name="line-140"></a><span class='hs-comment'>-- some state.</span> <a name="line-141"></a><span class='hs-comment'>--</span> <a name="line-142"></a><span class='hs-comment'>-- Similar to 'iterateM'.</span> <a name="line-143"></a><span class='hs-comment'>--</span> <a name="line-144"></a><span class='hs-comment'>-- Since: 0.4.8</span> <a name="line-145"></a> <a name="line-146"></a><a name="unfoldM"></a><span class='hs-definition'>unfoldM</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Monad</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=></span> <span class='hs-layout'>(</span><span class='hs-varid'>s</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>m</span> <span class='hs-layout'>(</span><span class='hs-conid'>Maybe</span> <span class='hs-layout'>(</span><span class='hs-conid'>Word8</span><span class='hs-layout'>,</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Enumerator</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-varid'>m</span> <span class='hs-varid'>b</span> <a name="line-147"></a><span class='hs-definition'>unfoldM</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>checkContinue1</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>loop</span> <span class='hs-varid'>s</span> <span class='hs-varid'>k</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span> <a name="line-148"></a> <span class='hs-varid'>fs</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>lift</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <a name="line-149"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>fs</span> <span class='hs-keyword'>of</span> <a name="line-150"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>continue</span> <span class='hs-varid'>k</span> <a name="line-151"></a> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-varid'>b</span><span class='hs-layout'>,</span> <span class='hs-varid'>s'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>k</span> <span class='hs-layout'>(</span><span class='hs-conid'>Chunks</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-varid'>singleton</span> <span class='hs-varid'>b</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span> <span class='hs-varop'>>>==</span> <span class='hs-varid'>loop</span> <span class='hs-varid'>s'</span> <a name="line-152"></a> <a name="line-153"></a> <a name="line-154"></a><span class='hs-comment'>-- | @'map' f@ applies /f/ to each input byte and feeds the</span> <a name="line-155"></a><span class='hs-comment'>-- resulting outputs to the inner iteratee.</span> <a name="line-156"></a><span class='hs-comment'>--</span> <a name="line-157"></a><span class='hs-comment'>-- Since: 0.4.8</span> <a name="line-158"></a> <a name="line-159"></a><a name="map"></a><span class='hs-definition'>map</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Monad</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=></span> <span class='hs-layout'>(</span><span class='hs-conid'>Word8</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Word8</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Enumeratee</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-varid'>m</span> <span class='hs-varid'>b</span> <a name="line-160"></a><span class='hs-definition'>map</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Enumerator</span><span class='hs-varop'>.</span><span class='hs-conid'>Binary</span><span class='hs-varop'>.</span><span class='hs-varid'>concatMap</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>x</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-varid'>singleton</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <a name="line-161"></a> <a name="line-162"></a> <a name="line-163"></a><span class='hs-comment'>-- | @'mapM' f@ applies /f/ to each input byte and feeds the</span> <a name="line-164"></a><span class='hs-comment'>-- resulting outputs to the inner iteratee.</span> <a name="line-165"></a><span class='hs-comment'>--</span> <a name="line-166"></a><span class='hs-comment'>-- Since: 0.4.8</span> <a name="line-167"></a> <a name="line-168"></a><a name="mapM"></a><span class='hs-definition'>mapM</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Monad</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=></span> <span class='hs-layout'>(</span><span class='hs-conid'>Word8</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>m</span> <span class='hs-conid'>Word8</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Enumeratee</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-varid'>m</span> <span class='hs-varid'>b</span> <a name="line-169"></a><span class='hs-definition'>mapM</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Enumerator</span><span class='hs-varop'>.</span><span class='hs-conid'>Binary</span><span class='hs-varop'>.</span><span class='hs-varid'>concatMapM</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>x</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>liftM</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-varid'>singleton</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <a name="line-170"></a> <a name="line-171"></a> <a name="line-172"></a><span class='hs-comment'>-- | @'mapM_' f@ applies /f/ to each input byte, and discards the results.</span> <a name="line-173"></a><span class='hs-comment'>--</span> <a name="line-174"></a><span class='hs-comment'>-- Since: 0.4.11</span> <a name="line-175"></a> <a name="line-176"></a><a name="mapM_"></a><span class='hs-definition'>mapM_</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Monad</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=></span> <span class='hs-layout'>(</span><span class='hs-conid'>Word8</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>m</span> <span class='hs-conid'>()</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Iteratee</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-varid'>m</span> <span class='hs-conid'>()</span> <a name="line-177"></a><span class='hs-definition'>mapM_</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>foldM</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-keyword'>_</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>f</span> <span class='hs-varid'>x</span> <span class='hs-varop'>>></span> <span class='hs-varid'>return</span> <span class='hs-conid'>()</span><span class='hs-layout'>)</span> <span class='hs-conid'>()</span> <a name="line-178"></a> <a name="line-179"></a> <a name="line-180"></a><span class='hs-comment'>-- | @'concatMap' f@ applies /f/ to each input byte and feeds the</span> <a name="line-181"></a><span class='hs-comment'>-- resulting outputs to the inner iteratee.</span> <a name="line-182"></a><span class='hs-comment'>--</span> <a name="line-183"></a><span class='hs-comment'>-- Since: 0.4.8</span> <a name="line-184"></a> <a name="line-185"></a><a name="concatMap"></a><span class='hs-definition'>concatMap</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Monad</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=></span> <span class='hs-layout'>(</span><span class='hs-conid'>Word8</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Enumeratee</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-varid'>m</span> <span class='hs-varid'>b</span> <a name="line-186"></a><span class='hs-definition'>concatMap</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Enumerator</span><span class='hs-varop'>.</span><span class='hs-conid'>Binary</span><span class='hs-varop'>.</span><span class='hs-varid'>concatMapM</span> <span class='hs-layout'>(</span><span class='hs-varid'>return</span> <span class='hs-varop'>.</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <a name="line-187"></a> <a name="line-188"></a> <a name="line-189"></a><span class='hs-comment'>-- | @'concatMapM' f@ applies /f/ to each input byte and feeds the</span> <a name="line-190"></a><span class='hs-comment'>-- resulting outputs to the inner iteratee.</span> <a name="line-191"></a><span class='hs-comment'>--</span> <a name="line-192"></a><span class='hs-comment'>-- Since: 0.4.8</span> <a name="line-193"></a> <a name="line-194"></a><a name="concatMapM"></a><span class='hs-definition'>concatMapM</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Monad</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=></span> <span class='hs-layout'>(</span><span class='hs-conid'>Word8</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>m</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Enumeratee</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-varid'>m</span> <span class='hs-varid'>b</span> <a name="line-195"></a><span class='hs-definition'>concatMapM</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>checkDone</span> <span class='hs-layout'>(</span><span class='hs-varid'>continue</span> <span class='hs-varop'>.</span> <span class='hs-varid'>step</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span> <a name="line-196"></a> <span class='hs-varid'>step</span> <span class='hs-varid'>k</span> <span class='hs-conid'>EOF</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>yield</span> <span class='hs-layout'>(</span><span class='hs-conid'>Continue</span> <span class='hs-varid'>k</span><span class='hs-layout'>)</span> <span class='hs-conid'>EOF</span> <a name="line-197"></a> <span class='hs-varid'>step</span> <span class='hs-varid'>k</span> <span class='hs-layout'>(</span><span class='hs-conid'>Chunks</span> <span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>loop</span> <span class='hs-varid'>k</span> <span class='hs-layout'>(</span><span class='hs-conid'>BL</span><span class='hs-varop'>.</span><span class='hs-varid'>unpack</span> <span class='hs-layout'>(</span><span class='hs-conid'>BL</span><span class='hs-varop'>.</span><span class='hs-varid'>fromChunks</span> <span class='hs-varid'>xs</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <a name="line-198"></a> <a name="line-199"></a> <span class='hs-varid'>loop</span> <span class='hs-varid'>k</span> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>continue</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-200"></a> <span class='hs-varid'>loop</span> <span class='hs-varid'>k</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-keyglyph'>=</span> <span class='hs-keyword'>do</span> <a name="line-201"></a> <span class='hs-varid'>fx</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>lift</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <a name="line-202"></a> <span class='hs-varid'>k</span> <span class='hs-layout'>(</span><span class='hs-conid'>Chunks</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>fx</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span> <span class='hs-varop'>>>==</span> <a name="line-203"></a> <span class='hs-varid'>checkDoneEx</span> <span class='hs-layout'>(</span><span class='hs-conid'>Chunks</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-varid'>pack</span> <span class='hs-varid'>xs</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>k'</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>loop</span> <span class='hs-varid'>k'</span> <span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <a name="line-204"></a> <a name="line-205"></a> <a name="line-206"></a><span class='hs-comment'>-- | Similar to 'concatMap', but with a stateful step function.</span> <a name="line-207"></a><span class='hs-comment'>--</span> <a name="line-208"></a><span class='hs-comment'>-- Since: 0.4.11</span> <a name="line-209"></a> <a name="line-210"></a><a name="concatMapAccum"></a><span class='hs-definition'>concatMapAccum</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Monad</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=></span> <span class='hs-layout'>(</span><span class='hs-varid'>s</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Word8</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>s</span><span class='hs-layout'>,</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Enumeratee</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-varid'>m</span> <span class='hs-varid'>b</span> <a name="line-211"></a><span class='hs-definition'>concatMapAccum</span> <span class='hs-varid'>f</span> <span class='hs-varid'>s0</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>checkDone</span> <span class='hs-layout'>(</span><span class='hs-varid'>continue</span> <span class='hs-varop'>.</span> <span class='hs-varid'>step</span> <span class='hs-varid'>s0</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span> <a name="line-212"></a> <span class='hs-varid'>step</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>k</span> <span class='hs-conid'>EOF</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>yield</span> <span class='hs-layout'>(</span><span class='hs-conid'>Continue</span> <span class='hs-varid'>k</span><span class='hs-layout'>)</span> <span class='hs-conid'>EOF</span> <a name="line-213"></a> <span class='hs-varid'>step</span> <span class='hs-varid'>s</span> <span class='hs-varid'>k</span> <span class='hs-layout'>(</span><span class='hs-conid'>Chunks</span> <span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>loop</span> <span class='hs-varid'>s</span> <span class='hs-varid'>k</span> <span class='hs-varid'>xs</span> <a name="line-214"></a> <a name="line-215"></a> <span class='hs-varid'>loop</span> <span class='hs-varid'>s</span> <span class='hs-varid'>k</span> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>continue</span> <span class='hs-layout'>(</span><span class='hs-varid'>step</span> <span class='hs-varid'>s</span> <span class='hs-varid'>k</span><span class='hs-layout'>)</span> <a name="line-216"></a> <span class='hs-varid'>loop</span> <span class='hs-varid'>s</span> <span class='hs-varid'>k</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-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-varid'>uncons</span> <span class='hs-varid'>x</span> <span class='hs-keyword'>of</span> <a name="line-217"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>loop</span> <span class='hs-varid'>s</span> <span class='hs-varid'>k</span> <span class='hs-varid'>xs</span> <a name="line-218"></a> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-varid'>b</span><span class='hs-layout'>,</span> <span class='hs-varid'>x'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>case</span> <span class='hs-varid'>f</span> <span class='hs-varid'>s</span> <span class='hs-varid'>b</span> <span class='hs-keyword'>of</span> <a name="line-219"></a> <span class='hs-layout'>(</span><span class='hs-varid'>s'</span><span class='hs-layout'>,</span> <span class='hs-varid'>ai</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>k</span> <span class='hs-layout'>(</span><span class='hs-conid'>Chunks</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>ai</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span> <span class='hs-varop'>>>==</span> <a name="line-220"></a> <span class='hs-varid'>checkDoneEx</span> <span class='hs-layout'>(</span><span class='hs-conid'>Chunks</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-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>k'</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>loop</span> <span class='hs-varid'>s'</span> <span class='hs-varid'>k'</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-layout'>)</span> <a name="line-221"></a> <a name="line-222"></a> <a name="line-223"></a><span class='hs-comment'>-- | Similar to 'concatMapM', but with a stateful step function.</span> <a name="line-224"></a><span class='hs-comment'>--</span> <a name="line-225"></a><span class='hs-comment'>-- Since: 0.4.11</span> <a name="line-226"></a> <a name="line-227"></a><a name="concatMapAccumM"></a><span class='hs-definition'>concatMapAccumM</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Monad</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=></span> <span class='hs-layout'>(</span><span class='hs-varid'>s</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Word8</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>m</span> <span class='hs-layout'>(</span><span class='hs-varid'>s</span><span class='hs-layout'>,</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Enumeratee</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-varid'>m</span> <span class='hs-varid'>b</span> <a name="line-228"></a><span class='hs-definition'>concatMapAccumM</span> <span class='hs-varid'>f</span> <span class='hs-varid'>s0</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>checkDone</span> <span class='hs-layout'>(</span><span class='hs-varid'>continue</span> <span class='hs-varop'>.</span> <span class='hs-varid'>step</span> <span class='hs-varid'>s0</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span> <a name="line-229"></a> <span class='hs-varid'>step</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>k</span> <span class='hs-conid'>EOF</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>yield</span> <span class='hs-layout'>(</span><span class='hs-conid'>Continue</span> <span class='hs-varid'>k</span><span class='hs-layout'>)</span> <span class='hs-conid'>EOF</span> <a name="line-230"></a> <span class='hs-varid'>step</span> <span class='hs-varid'>s</span> <span class='hs-varid'>k</span> <span class='hs-layout'>(</span><span class='hs-conid'>Chunks</span> <span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>loop</span> <span class='hs-varid'>s</span> <span class='hs-varid'>k</span> <span class='hs-varid'>xs</span> <a name="line-231"></a> <a name="line-232"></a> <span class='hs-varid'>loop</span> <span class='hs-varid'>s</span> <span class='hs-varid'>k</span> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>continue</span> <span class='hs-layout'>(</span><span class='hs-varid'>step</span> <span class='hs-varid'>s</span> <span class='hs-varid'>k</span><span class='hs-layout'>)</span> <a name="line-233"></a> <span class='hs-varid'>loop</span> <span class='hs-varid'>s</span> <span class='hs-varid'>k</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-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-varid'>uncons</span> <span class='hs-varid'>x</span> <span class='hs-keyword'>of</span> <a name="line-234"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>loop</span> <span class='hs-varid'>s</span> <span class='hs-varid'>k</span> <span class='hs-varid'>xs</span> <a name="line-235"></a> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-varid'>b</span><span class='hs-layout'>,</span> <span class='hs-varid'>x'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span> <a name="line-236"></a> <span class='hs-layout'>(</span><span class='hs-varid'>s'</span><span class='hs-layout'>,</span> <span class='hs-varid'>ai</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>lift</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>s</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <a name="line-237"></a> <span class='hs-varid'>k</span> <span class='hs-layout'>(</span><span class='hs-conid'>Chunks</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>ai</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span> <span class='hs-varop'>>>==</span> <a name="line-238"></a> <span class='hs-varid'>checkDoneEx</span> <span class='hs-layout'>(</span><span class='hs-conid'>Chunks</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-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>k'</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>loop</span> <span class='hs-varid'>s'</span> <span class='hs-varid'>k'</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-layout'>)</span> <a name="line-239"></a> <a name="line-240"></a> <a name="line-241"></a><span class='hs-comment'>-- | Similar to 'map', but with a stateful step function.</span> <a name="line-242"></a><span class='hs-comment'>--</span> <a name="line-243"></a><span class='hs-comment'>-- Since: 0.4.9</span> <a name="line-244"></a> <a name="line-245"></a><a name="mapAccum"></a><span class='hs-definition'>mapAccum</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Monad</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=></span> <span class='hs-layout'>(</span><span class='hs-varid'>s</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Word8</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>s</span><span class='hs-layout'>,</span> <span class='hs-conid'>Word8</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Enumeratee</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-varid'>m</span> <span class='hs-varid'>b</span> <a name="line-246"></a><span class='hs-definition'>mapAccum</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>concatMapAccum</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>s</span> <span class='hs-varid'>w</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>case</span> <span class='hs-varid'>f</span> <span class='hs-varid'>s</span> <span class='hs-varid'>w</span> <span class='hs-keyword'>of</span> <span class='hs-layout'>(</span><span class='hs-varid'>s'</span><span class='hs-layout'>,</span> <span class='hs-varid'>w'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>s'</span><span class='hs-layout'>,</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-varid'>singleton</span> <span class='hs-varid'>w'</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <a name="line-247"></a> <a name="line-248"></a> <a name="line-249"></a><span class='hs-comment'>-- | Similar to 'mapM', but with a stateful step function.</span> <a name="line-250"></a><span class='hs-comment'>--</span> <a name="line-251"></a><span class='hs-comment'>-- Since: 0.4.9</span> <a name="line-252"></a> <a name="line-253"></a><a name="mapAccumM"></a><span class='hs-definition'>mapAccumM</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Monad</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=></span> <span class='hs-layout'>(</span><span class='hs-varid'>s</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Word8</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>m</span> <span class='hs-layout'>(</span><span class='hs-varid'>s</span><span class='hs-layout'>,</span> <span class='hs-conid'>Word8</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Enumeratee</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-varid'>m</span> <span class='hs-varid'>b</span> <a name="line-254"></a><span class='hs-definition'>mapAccumM</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>concatMapAccumM</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>s</span> <span class='hs-varid'>w</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span> <a name="line-255"></a> <span class='hs-layout'>(</span><span class='hs-varid'>s'</span><span class='hs-layout'>,</span> <span class='hs-varid'>w'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>f</span> <span class='hs-varid'>s</span> <span class='hs-varid'>w</span> <a name="line-256"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>s'</span><span class='hs-layout'>,</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-varid'>singleton</span> <span class='hs-varid'>w'</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <a name="line-257"></a> <a name="line-258"></a> <a name="line-259"></a><span class='hs-comment'>-- | @'iterate' f x@ enumerates an infinite stream of repeated applications</span> <a name="line-260"></a><span class='hs-comment'>-- of /f/ to /x/.</span> <a name="line-261"></a><span class='hs-comment'>--</span> <a name="line-262"></a><span class='hs-comment'>-- Analogous to 'Prelude.iterate'.</span> <a name="line-263"></a><span class='hs-comment'>--</span> <a name="line-264"></a><span class='hs-comment'>-- Since: 0.4.8</span> <a name="line-265"></a> <a name="line-266"></a><a name="iterate"></a><span class='hs-definition'>iterate</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Monad</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=></span> <span class='hs-layout'>(</span><span class='hs-conid'>Word8</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Word8</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Word8</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Enumerator</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-varid'>m</span> <span class='hs-varid'>b</span> <a name="line-267"></a><span class='hs-definition'>iterate</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>checkContinue1</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>loop</span> <span class='hs-varid'>s</span> <span class='hs-varid'>k</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>k</span> <span class='hs-layout'>(</span><span class='hs-conid'>Chunks</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-varid'>singleton</span> <span class='hs-varid'>s</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span> <span class='hs-varop'>>>==</span> <span class='hs-varid'>loop</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <a name="line-268"></a> <a name="line-269"></a> <a name="line-270"></a><span class='hs-comment'>-- | Similar to 'iterate', except the iteration function is monadic.</span> <a name="line-271"></a><span class='hs-comment'>--</span> <a name="line-272"></a><span class='hs-comment'>-- Since: 0.4.8</span> <a name="line-273"></a> <a name="line-274"></a><a name="iterateM"></a><span class='hs-definition'>iterateM</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Monad</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=></span> <span class='hs-layout'>(</span><span class='hs-conid'>Word8</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>m</span> <span class='hs-conid'>Word8</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Word8</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Enumerator</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-varid'>m</span> <span class='hs-varid'>b</span> <a name="line-275"></a><span class='hs-definition'>iterateM</span> <span class='hs-varid'>f</span> <span class='hs-varid'>base</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>worker</span> <span class='hs-layout'>(</span><span class='hs-varid'>return</span> <span class='hs-varid'>base</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span> <a name="line-276"></a> <span class='hs-varid'>worker</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>checkContinue1</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>loop</span> <span class='hs-varid'>m_byte</span> <span class='hs-varid'>k</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span> <a name="line-277"></a> <span class='hs-varid'>byte</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>lift</span> <span class='hs-varid'>m_byte</span> <a name="line-278"></a> <span class='hs-varid'>k</span> <span class='hs-layout'>(</span><span class='hs-conid'>Chunks</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-varid'>singleton</span> <span class='hs-varid'>byte</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span> <span class='hs-varop'>>>==</span> <span class='hs-varid'>loop</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>byte</span><span class='hs-layout'>)</span> <a name="line-279"></a> <a name="line-280"></a> <a name="line-281"></a><span class='hs-comment'>-- | Enumerates an infinite stream of a single byte.</span> <a name="line-282"></a><span class='hs-comment'>--</span> <a name="line-283"></a><span class='hs-comment'>-- Analogous to 'Prelude.repeat'.</span> <a name="line-284"></a><span class='hs-comment'>--</span> <a name="line-285"></a><span class='hs-comment'>-- Since: 0.4.8</span> <a name="line-286"></a> <a name="line-287"></a><a name="repeat"></a><span class='hs-definition'>repeat</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Monad</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Word8</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Enumerator</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-varid'>m</span> <span class='hs-varid'>b</span> <a name="line-288"></a><span class='hs-definition'>repeat</span> <span class='hs-varid'>byte</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>EL</span><span class='hs-varop'>.</span><span class='hs-varid'>repeat</span> <span class='hs-layout'>(</span><span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-varid'>singleton</span> <span class='hs-varid'>byte</span><span class='hs-layout'>)</span> <a name="line-289"></a> <a name="line-290"></a> <a name="line-291"></a><span class='hs-comment'>-- | Enumerates an infinite stream of byte. Each byte is computed by the</span> <a name="line-292"></a><span class='hs-comment'>-- underlying monad.</span> <a name="line-293"></a><span class='hs-comment'>--</span> <a name="line-294"></a><span class='hs-comment'>-- Since: 0.4.8</span> <a name="line-295"></a> <a name="line-296"></a><a name="repeatM"></a><span class='hs-definition'>repeatM</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Monad</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=></span> <span class='hs-varid'>m</span> <span class='hs-conid'>Word8</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Enumerator</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-varid'>m</span> <span class='hs-varid'>b</span> <a name="line-297"></a><span class='hs-definition'>repeatM</span> <span class='hs-varid'>next</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>EL</span><span class='hs-varop'>.</span><span class='hs-varid'>repeatM</span> <span class='hs-layout'>(</span><span class='hs-varid'>liftM</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-varid'>singleton</span> <span class='hs-varid'>next</span><span class='hs-layout'>)</span> <a name="line-298"></a> <a name="line-299"></a> <a name="line-300"></a><span class='hs-comment'>-- | @'replicate' n x@ enumerates a stream containing /n/ copies of /x/.</span> <a name="line-301"></a><span class='hs-comment'>--</span> <a name="line-302"></a><span class='hs-comment'>-- Since: 0.4.8</span> <a name="line-303"></a> <a name="line-304"></a><a name="replicate"></a><span class='hs-definition'>replicate</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Monad</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Integer</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Word8</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Enumerator</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-varid'>m</span> <span class='hs-varid'>b</span> <a name="line-305"></a><span class='hs-definition'>replicate</span> <span class='hs-varid'>n</span> <span class='hs-varid'>byte</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>EL</span><span class='hs-varop'>.</span><span class='hs-varid'>replicate</span> <span class='hs-varid'>n</span> <span class='hs-layout'>(</span><span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-varid'>singleton</span> <span class='hs-varid'>byte</span><span class='hs-layout'>)</span> <a name="line-306"></a> <a name="line-307"></a> <a name="line-308"></a><span class='hs-comment'>-- | @'replicateM' n m_x@ enumerates a stream of /n/ bytes, with each byte</span> <a name="line-309"></a><span class='hs-comment'>-- computed by /m_x/.</span> <a name="line-310"></a><span class='hs-comment'>--</span> <a name="line-311"></a><span class='hs-comment'>-- Since: 0.4.8</span> <a name="line-312"></a> <a name="line-313"></a><a name="replicateM"></a><span class='hs-definition'>replicateM</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Monad</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Integer</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>m</span> <span class='hs-conid'>Word8</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Enumerator</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-varid'>m</span> <span class='hs-varid'>b</span> <a name="line-314"></a><span class='hs-definition'>replicateM</span> <span class='hs-varid'>n</span> <span class='hs-varid'>next</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>EL</span><span class='hs-varop'>.</span><span class='hs-varid'>replicateM</span> <span class='hs-varid'>n</span> <span class='hs-layout'>(</span><span class='hs-varid'>liftM</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-varid'>singleton</span> <span class='hs-varid'>next</span><span class='hs-layout'>)</span> <a name="line-315"></a> <a name="line-316"></a> <a name="line-317"></a><span class='hs-comment'>-- | Like 'repeatM', except the computation may terminate the stream by</span> <a name="line-318"></a><span class='hs-comment'>-- returning 'Nothing'.</span> <a name="line-319"></a><span class='hs-comment'>--</span> <a name="line-320"></a><span class='hs-comment'>-- Since: 0.4.8</span> <a name="line-321"></a> <a name="line-322"></a><a name="generateM"></a><span class='hs-definition'>generateM</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Monad</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=></span> <span class='hs-varid'>m</span> <span class='hs-layout'>(</span><span class='hs-conid'>Maybe</span> <span class='hs-conid'>Word8</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Enumerator</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-varid'>m</span> <span class='hs-varid'>b</span> <a name="line-323"></a><span class='hs-definition'>generateM</span> <span class='hs-varid'>next</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>EL</span><span class='hs-varop'>.</span><span class='hs-varid'>generateM</span> <span class='hs-layout'>(</span><span class='hs-varid'>liftM</span> <span class='hs-layout'>(</span><span class='hs-varid'>liftM</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-varid'>singleton</span><span class='hs-layout'>)</span> <span class='hs-varid'>next</span><span class='hs-layout'>)</span> <a name="line-324"></a> <a name="line-325"></a> <a name="line-326"></a><span class='hs-comment'>-- | Applies a predicate to the stream. The inner iteratee only receives</span> <a name="line-327"></a><span class='hs-comment'>-- characters for which the predicate is @True@.</span> <a name="line-328"></a><span class='hs-comment'>--</span> <a name="line-329"></a><span class='hs-comment'>-- Since: 0.4.8</span> <a name="line-330"></a> <a name="line-331"></a><a name="filter"></a><span class='hs-definition'>filter</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Monad</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=></span> <span class='hs-layout'>(</span><span class='hs-conid'>Word8</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'>Enumeratee</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-varid'>m</span> <span class='hs-varid'>b</span> <a name="line-332"></a><span class='hs-definition'>filter</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Enumerator</span><span class='hs-varop'>.</span><span class='hs-conid'>Binary</span><span class='hs-varop'>.</span><span class='hs-varid'>concatMap</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>x</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-varid'>pack</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>x</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>p</span> <span class='hs-varid'>x</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span> <a name="line-333"></a> <a name="line-334"></a> <a name="line-335"></a><span class='hs-comment'>-- | Applies a monadic predicate to the stream. The inner iteratee only</span> <a name="line-336"></a><span class='hs-comment'>-- receives bytes for which the predicate returns @True@.</span> <a name="line-337"></a><span class='hs-comment'>--</span> <a name="line-338"></a><span class='hs-comment'>-- Since: 0.4.8</span> <a name="line-339"></a> <a name="line-340"></a><a name="filterM"></a><span class='hs-definition'>filterM</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Monad</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=></span> <span class='hs-layout'>(</span><span class='hs-conid'>Word8</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>m</span> <span class='hs-conid'>Bool</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Enumeratee</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-varid'>m</span> <span class='hs-varid'>b</span> <a name="line-341"></a><span class='hs-definition'>filterM</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Enumerator</span><span class='hs-varop'>.</span><span class='hs-conid'>Binary</span><span class='hs-varop'>.</span><span class='hs-varid'>concatMapM</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>x</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>liftM</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-varid'>pack</span> <span class='hs-layout'>(</span><span class='hs-conid'>CM</span><span class='hs-varop'>.</span><span class='hs-varid'>filterM</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>x</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <a name="line-342"></a> <a name="line-343"></a> <a name="line-344"></a><span class='hs-comment'>-- | @'take' n@ extracts the next /n/ bytes from the stream, as a lazy</span> <a name="line-345"></a><span class='hs-comment'>-- ByteString.</span> <a name="line-346"></a><span class='hs-comment'>--</span> <a name="line-347"></a><span class='hs-comment'>-- Since: 0.4.5</span> <a name="line-348"></a> <a name="line-349"></a><a name="take"></a><span class='hs-definition'>take</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Monad</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Integer</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Iteratee</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-varid'>m</span> <span class='hs-conid'>BL</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <a name="line-350"></a><span class='hs-definition'>take</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'>0</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-conid'>BL</span><span class='hs-varop'>.</span><span class='hs-varid'>empty</span> <a name="line-351"></a><span class='hs-definition'>take</span> <span class='hs-varid'>n</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>continue</span> <span class='hs-layout'>(</span><span class='hs-varid'>loop</span> <span class='hs-varid'>id</span> <span class='hs-varid'>n</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span> <a name="line-352"></a> <span class='hs-varid'>loop</span> <span class='hs-varid'>acc</span> <span class='hs-varid'>n'</span> <span class='hs-layout'>(</span><span class='hs-conid'>Chunks</span> <span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>iter</span> <span class='hs-keyword'>where</span> <a name="line-353"></a> <span class='hs-varid'>lazy</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>BL</span><span class='hs-varop'>.</span><span class='hs-varid'>fromChunks</span> <span class='hs-varid'>xs</span> <a name="line-354"></a> <span class='hs-varid'>len</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>toInteger</span> <span class='hs-layout'>(</span><span class='hs-conid'>BL</span><span class='hs-varop'>.</span><span class='hs-varid'>length</span> <span class='hs-varid'>lazy</span><span class='hs-layout'>)</span> <a name="line-355"></a> <a name="line-356"></a> <span class='hs-varid'>iter</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>len</span> <span class='hs-varop'><</span> <span class='hs-varid'>n'</span> <a name="line-357"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>continue</span> <span class='hs-layout'>(</span><span class='hs-varid'>loop</span> <span class='hs-layout'>(</span><span class='hs-varid'>acc</span> <span class='hs-varop'>.</span> <span class='hs-layout'>(</span><span class='hs-conid'>BL</span><span class='hs-varop'>.</span><span class='hs-varid'>append</span> <span class='hs-varid'>lazy</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>n'</span> <span class='hs-comment'>-</span> <span class='hs-varid'>len</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <a name="line-358"></a> <span class='hs-keyword'>else</span> <span class='hs-keyword'>let</span> <a name="line-359"></a> <span class='hs-layout'>(</span><span class='hs-varid'>xs'</span><span class='hs-layout'>,</span> <span class='hs-varid'>extra</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>BL</span><span class='hs-varop'>.</span><span class='hs-varid'>splitAt</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromInteger</span> <span class='hs-varid'>n'</span><span class='hs-layout'>)</span> <span class='hs-varid'>lazy</span> <a name="line-360"></a> <span class='hs-keyword'>in</span> <span class='hs-varid'>yield</span> <span class='hs-layout'>(</span><span class='hs-varid'>acc</span> <span class='hs-varid'>xs'</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>toChunks</span> <span class='hs-varid'>extra</span><span class='hs-layout'>)</span> <a name="line-361"></a> <span class='hs-varid'>loop</span> <span class='hs-varid'>acc</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>EOF</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>yield</span> <span class='hs-layout'>(</span><span class='hs-varid'>acc</span> <span class='hs-conid'>BL</span><span class='hs-varop'>.</span><span class='hs-varid'>empty</span><span class='hs-layout'>)</span> <span class='hs-conid'>EOF</span> <a name="line-362"></a> <a name="line-363"></a> <a name="line-364"></a><span class='hs-comment'>-- | @'takeWhile' p@ extracts input from the stream until the first byte which</span> <a name="line-365"></a><span class='hs-comment'>-- does not match the predicate.</span> <a name="line-366"></a><span class='hs-comment'>--</span> <a name="line-367"></a><span class='hs-comment'>-- Since: 0.4.5</span> <a name="line-368"></a> <a name="line-369"></a><a name="takeWhile"></a><span class='hs-definition'>takeWhile</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Monad</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=></span> <span class='hs-layout'>(</span><span class='hs-conid'>Word8</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'>Iteratee</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-varid'>m</span> <span class='hs-conid'>BL</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <a name="line-370"></a><span class='hs-definition'>takeWhile</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>continue</span> <span class='hs-layout'>(</span><span class='hs-varid'>loop</span> <span class='hs-varid'>id</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span> <a name="line-371"></a> <span class='hs-varid'>loop</span> <span class='hs-varid'>acc</span> <span class='hs-layout'>(</span><span class='hs-conid'>Chunks</span> <span class='hs-conid'>[]</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>continue</span> <span class='hs-layout'>(</span><span class='hs-varid'>loop</span> <span class='hs-varid'>acc</span><span class='hs-layout'>)</span> <a name="line-372"></a> <span class='hs-varid'>loop</span> <span class='hs-varid'>acc</span> <span class='hs-layout'>(</span><span class='hs-conid'>Chunks</span> <span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>iter</span> <span class='hs-keyword'>where</span> <a name="line-373"></a> <span class='hs-varid'>lazy</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>BL</span><span class='hs-varop'>.</span><span class='hs-varid'>fromChunks</span> <span class='hs-varid'>xs</span> <a name="line-374"></a> <span class='hs-layout'>(</span><span class='hs-varid'>xs'</span><span class='hs-layout'>,</span> <span class='hs-varid'>extra</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>BL</span><span class='hs-varop'>.</span><span class='hs-varid'>span</span> <span class='hs-varid'>p</span> <span class='hs-varid'>lazy</span> <a name="line-375"></a> <span class='hs-varid'>iter</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>if</span> <span class='hs-conid'>BL</span><span class='hs-varop'>.</span><span class='hs-varid'>null</span> <span class='hs-varid'>extra</span> <a name="line-376"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>continue</span> <span class='hs-layout'>(</span><span class='hs-varid'>loop</span> <span class='hs-layout'>(</span><span class='hs-varid'>acc</span> <span class='hs-varop'>.</span> <span class='hs-layout'>(</span><span class='hs-conid'>BL</span><span class='hs-varop'>.</span><span class='hs-varid'>append</span> <span class='hs-varid'>lazy</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <a name="line-377"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>yield</span> <span class='hs-layout'>(</span><span class='hs-varid'>acc</span> <span class='hs-varid'>xs'</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>toChunks</span> <span class='hs-varid'>extra</span><span class='hs-layout'>)</span> <a name="line-378"></a> <span class='hs-varid'>loop</span> <span class='hs-varid'>acc</span> <span class='hs-conid'>EOF</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>yield</span> <span class='hs-layout'>(</span><span class='hs-varid'>acc</span> <span class='hs-conid'>BL</span><span class='hs-varop'>.</span><span class='hs-varid'>empty</span><span class='hs-layout'>)</span> <span class='hs-conid'>EOF</span> <a name="line-379"></a> <a name="line-380"></a> <a name="line-381"></a><span class='hs-comment'>-- | @'consume' = 'takeWhile' (const True)@</span> <a name="line-382"></a><span class='hs-comment'>--</span> <a name="line-383"></a><span class='hs-comment'>-- Since: 0.4.5</span> <a name="line-384"></a> <a name="line-385"></a><a name="consume"></a><span class='hs-definition'>consume</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Monad</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Iteratee</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-varid'>m</span> <span class='hs-conid'>BL</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <a name="line-386"></a><span class='hs-definition'>consume</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>continue</span> <span class='hs-layout'>(</span><span class='hs-varid'>loop</span> <span class='hs-varid'>id</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span> <a name="line-387"></a> <span class='hs-varid'>loop</span> <span class='hs-varid'>acc</span> <span class='hs-layout'>(</span><span class='hs-conid'>Chunks</span> <span class='hs-conid'>[]</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>continue</span> <span class='hs-layout'>(</span><span class='hs-varid'>loop</span> <span class='hs-varid'>acc</span><span class='hs-layout'>)</span> <a name="line-388"></a> <span class='hs-varid'>loop</span> <span class='hs-varid'>acc</span> <span class='hs-layout'>(</span><span class='hs-conid'>Chunks</span> <span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>iter</span> <span class='hs-keyword'>where</span> <a name="line-389"></a> <span class='hs-varid'>lazy</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>BL</span><span class='hs-varop'>.</span><span class='hs-varid'>fromChunks</span> <span class='hs-varid'>xs</span> <a name="line-390"></a> <span class='hs-varid'>iter</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>continue</span> <span class='hs-layout'>(</span><span class='hs-varid'>loop</span> <span class='hs-layout'>(</span><span class='hs-varid'>acc</span> <span class='hs-varop'>.</span> <span class='hs-layout'>(</span><span class='hs-conid'>BL</span><span class='hs-varop'>.</span><span class='hs-varid'>append</span> <span class='hs-varid'>lazy</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <a name="line-391"></a> <span class='hs-varid'>loop</span> <span class='hs-varid'>acc</span> <span class='hs-conid'>EOF</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>yield</span> <span class='hs-layout'>(</span><span class='hs-varid'>acc</span> <span class='hs-conid'>BL</span><span class='hs-varop'>.</span><span class='hs-varid'>empty</span><span class='hs-layout'>)</span> <span class='hs-conid'>EOF</span> <a name="line-392"></a> <a name="line-393"></a> <a name="line-394"></a><span class='hs-comment'>-- | Get the next byte from the stream, or 'Nothing' if the stream has</span> <a name="line-395"></a><span class='hs-comment'>-- ended.</span> <a name="line-396"></a><span class='hs-comment'>--</span> <a name="line-397"></a><span class='hs-comment'>-- Since: 0.4.5</span> <a name="line-398"></a> <a name="line-399"></a><a name="head"></a><span class='hs-definition'>head</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Monad</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Iteratee</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-varid'>m</span> <span class='hs-layout'>(</span><span class='hs-conid'>Maybe</span> <span class='hs-conid'>Word8</span><span class='hs-layout'>)</span> <a name="line-400"></a><span class='hs-definition'>head</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>continue</span> <span class='hs-varid'>loop</span> <span class='hs-keyword'>where</span> <a name="line-401"></a> <span class='hs-varid'>loop</span> <span class='hs-layout'>(</span><span class='hs-conid'>Chunks</span> <span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-conid'>BL</span><span class='hs-varop'>.</span><span class='hs-varid'>uncons</span> <span class='hs-layout'>(</span><span class='hs-conid'>BL</span><span class='hs-varop'>.</span><span class='hs-varid'>fromChunks</span> <span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-keyword'>of</span> <a name="line-402"></a> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-varid'>char</span><span class='hs-layout'>,</span> <span class='hs-varid'>extra</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>yield</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>char</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>toChunks</span> <span class='hs-varid'>extra</span><span class='hs-layout'>)</span> <a name="line-403"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>head</span> <a name="line-404"></a> <span class='hs-varid'>loop</span> <span class='hs-conid'>EOF</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>yield</span> <span class='hs-conid'>Nothing</span> <span class='hs-conid'>EOF</span> <a name="line-405"></a> <a name="line-406"></a> <a name="line-407"></a><span class='hs-comment'>-- | @'drop' n@ ignores /n/ bytes of input from the stream.</span> <a name="line-408"></a><span class='hs-comment'>--</span> <a name="line-409"></a><span class='hs-comment'>-- Since: 0.4.5</span> <a name="line-410"></a> <a name="line-411"></a><a name="drop"></a><span class='hs-definition'>drop</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Monad</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Integer</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Iteratee</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-varid'>m</span> <span class='hs-conid'>()</span> <a name="line-412"></a><span class='hs-definition'>drop</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'>0</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-conid'>()</span> <a name="line-413"></a><span class='hs-definition'>drop</span> <span class='hs-varid'>n</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>continue</span> <span class='hs-layout'>(</span><span class='hs-varid'>loop</span> <span class='hs-varid'>n</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span> <a name="line-414"></a> <span class='hs-varid'>loop</span> <span class='hs-varid'>n'</span> <span class='hs-layout'>(</span><span class='hs-conid'>Chunks</span> <span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>iter</span> <span class='hs-keyword'>where</span> <a name="line-415"></a> <span class='hs-varid'>lazy</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>BL</span><span class='hs-varop'>.</span><span class='hs-varid'>fromChunks</span> <span class='hs-varid'>xs</span> <a name="line-416"></a> <span class='hs-varid'>len</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>toInteger</span> <span class='hs-layout'>(</span><span class='hs-conid'>BL</span><span class='hs-varop'>.</span><span class='hs-varid'>length</span> <span class='hs-varid'>lazy</span><span class='hs-layout'>)</span> <a name="line-417"></a> <span class='hs-varid'>iter</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>len</span> <span class='hs-varop'><</span> <span class='hs-varid'>n'</span> <a name="line-418"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>drop</span> <span class='hs-layout'>(</span><span class='hs-varid'>n'</span> <span class='hs-comment'>-</span> <span class='hs-varid'>len</span><span class='hs-layout'>)</span> <a name="line-419"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>yield</span> <span class='hs-conid'>()</span> <span class='hs-layout'>(</span><span class='hs-varid'>toChunks</span> <span class='hs-layout'>(</span><span class='hs-conid'>BL</span><span class='hs-varop'>.</span><span class='hs-varid'>drop</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromInteger</span> <span class='hs-varid'>n'</span><span class='hs-layout'>)</span> <span class='hs-varid'>lazy</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <a name="line-420"></a> <span class='hs-varid'>loop</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>EOF</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>yield</span> <span class='hs-conid'>()</span> <span class='hs-conid'>EOF</span> <a name="line-421"></a> <a name="line-422"></a> <a name="line-423"></a><span class='hs-comment'>-- | @'dropWhile' p@ ignores input from the stream until the first byte</span> <a name="line-424"></a><span class='hs-comment'>-- which does not match the predicate.</span> <a name="line-425"></a><span class='hs-comment'>--</span> <a name="line-426"></a><span class='hs-comment'>-- Since: 0.4.5</span> <a name="line-427"></a> <a name="line-428"></a><a name="dropWhile"></a><span class='hs-definition'>dropWhile</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Monad</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=></span> <span class='hs-layout'>(</span><span class='hs-conid'>Word8</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'>Iteratee</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-varid'>m</span> <span class='hs-conid'>()</span> <a name="line-429"></a><span class='hs-definition'>dropWhile</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>continue</span> <span class='hs-varid'>loop</span> <span class='hs-keyword'>where</span> <a name="line-430"></a> <span class='hs-varid'>loop</span> <span class='hs-layout'>(</span><span class='hs-conid'>Chunks</span> <span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>iter</span> <span class='hs-keyword'>where</span> <a name="line-431"></a> <span class='hs-varid'>lazy</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>BL</span><span class='hs-varop'>.</span><span class='hs-varid'>dropWhile</span> <span class='hs-varid'>p</span> <span class='hs-layout'>(</span><span class='hs-conid'>BL</span><span class='hs-varop'>.</span><span class='hs-varid'>fromChunks</span> <span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <a name="line-432"></a> <span class='hs-varid'>iter</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>if</span> <span class='hs-conid'>BL</span><span class='hs-varop'>.</span><span class='hs-varid'>null</span> <span class='hs-varid'>lazy</span> <a name="line-433"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>continue</span> <span class='hs-varid'>loop</span> <a name="line-434"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>yield</span> <span class='hs-conid'>()</span> <span class='hs-layout'>(</span><span class='hs-varid'>toChunks</span> <span class='hs-varid'>lazy</span><span class='hs-layout'>)</span> <a name="line-435"></a> <span class='hs-varid'>loop</span> <span class='hs-conid'>EOF</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>yield</span> <span class='hs-conid'>()</span> <span class='hs-conid'>EOF</span> <a name="line-436"></a> <a name="line-437"></a> <a name="line-438"></a><span class='hs-comment'>-- | @'require' n@ buffers input until at least /n/ bytes are available, or</span> <a name="line-439"></a><span class='hs-comment'>-- throws an error if the stream ends early.</span> <a name="line-440"></a><span class='hs-comment'>--</span> <a name="line-441"></a><span class='hs-comment'>-- Since: 0.4.5</span> <a name="line-442"></a> <a name="line-443"></a><a name="require"></a><span class='hs-definition'>require</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Monad</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Integer</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Iteratee</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-varid'>m</span> <span class='hs-conid'>()</span> <a name="line-444"></a><span class='hs-definition'>require</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'>0</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-conid'>()</span> <a name="line-445"></a><span class='hs-definition'>require</span> <span class='hs-varid'>n</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>continue</span> <span class='hs-layout'>(</span><span class='hs-varid'>loop</span> <span class='hs-varid'>id</span> <span class='hs-varid'>n</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span> <a name="line-446"></a> <span class='hs-varid'>loop</span> <span class='hs-varid'>acc</span> <span class='hs-varid'>n'</span> <span class='hs-layout'>(</span><span class='hs-conid'>Chunks</span> <span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>iter</span> <span class='hs-keyword'>where</span> <a name="line-447"></a> <span class='hs-varid'>lazy</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>BL</span><span class='hs-varop'>.</span><span class='hs-varid'>fromChunks</span> <span class='hs-varid'>xs</span> <a name="line-448"></a> <span class='hs-varid'>len</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>toInteger</span> <span class='hs-layout'>(</span><span class='hs-conid'>BL</span><span class='hs-varop'>.</span><span class='hs-varid'>length</span> <span class='hs-varid'>lazy</span><span class='hs-layout'>)</span> <a name="line-449"></a> <span class='hs-varid'>iter</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>len</span> <span class='hs-varop'><</span> <span class='hs-varid'>n'</span> <a name="line-450"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>continue</span> <span class='hs-layout'>(</span><span class='hs-varid'>loop</span> <span class='hs-layout'>(</span><span class='hs-varid'>acc</span> <span class='hs-varop'>.</span> <span class='hs-layout'>(</span><span class='hs-conid'>BL</span><span class='hs-varop'>.</span><span class='hs-varid'>append</span> <span class='hs-varid'>lazy</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>n'</span> <span class='hs-comment'>-</span> <span class='hs-varid'>len</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <a name="line-451"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>yield</span> <span class='hs-conid'>()</span> <span class='hs-layout'>(</span><span class='hs-varid'>toChunks</span> <span class='hs-layout'>(</span><span class='hs-varid'>acc</span> <span class='hs-varid'>lazy</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <a name="line-452"></a> <span class='hs-varid'>loop</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>EOF</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>throwError</span> <span class='hs-layout'>(</span><span class='hs-conid'>Exc</span><span class='hs-varop'>.</span><span class='hs-conid'>ErrorCall</span> <span class='hs-str'>"require: Unexpected EOF"</span><span class='hs-layout'>)</span> <a name="line-453"></a> <a name="line-454"></a> <a name="line-455"></a><span class='hs-comment'>-- | @'isolate' n@ reads at most /n/ bytes from the stream, and passes them</span> <a name="line-456"></a><span class='hs-comment'>-- to its iteratee. If the iteratee finishes early, bytes continue to be</span> <a name="line-457"></a><span class='hs-comment'>-- consumed from the outer stream until /n/ have been consumed.</span> <a name="line-458"></a><span class='hs-comment'>--</span> <a name="line-459"></a><span class='hs-comment'>-- Since: 0.4.5</span> <a name="line-460"></a> <a name="line-461"></a><a name="isolate"></a><span class='hs-definition'>isolate</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Monad</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Integer</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Enumeratee</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-varid'>m</span> <span class='hs-varid'>b</span> <a name="line-462"></a><span class='hs-definition'>isolate</span> <span class='hs-varid'>n</span> <span class='hs-varid'>step</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>n</span> <span class='hs-varop'><=</span> <span class='hs-num'>0</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-varid'>step</span> <a name="line-463"></a><span class='hs-definition'>isolate</span> <span class='hs-varid'>n</span> <span class='hs-layout'>(</span><span class='hs-conid'>Continue</span> <span class='hs-varid'>k</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>continue</span> <span class='hs-varid'>loop</span> <span class='hs-keyword'>where</span> <a name="line-464"></a> <span class='hs-varid'>loop</span> <span class='hs-layout'>(</span><span class='hs-conid'>Chunks</span> <span class='hs-conid'>[]</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>continue</span> <span class='hs-varid'>loop</span> <a name="line-465"></a> <span class='hs-varid'>loop</span> <span class='hs-layout'>(</span><span class='hs-conid'>Chunks</span> <span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>iter</span> <span class='hs-keyword'>where</span> <a name="line-466"></a> <span class='hs-varid'>lazy</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>BL</span><span class='hs-varop'>.</span><span class='hs-varid'>fromChunks</span> <span class='hs-varid'>xs</span> <a name="line-467"></a> <span class='hs-varid'>len</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>toInteger</span> <span class='hs-layout'>(</span><span class='hs-conid'>BL</span><span class='hs-varop'>.</span><span class='hs-varid'>length</span> <span class='hs-varid'>lazy</span><span class='hs-layout'>)</span> <a name="line-468"></a> <a name="line-469"></a> <span class='hs-varid'>iter</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>len</span> <span class='hs-varop'><=</span> <span class='hs-varid'>n</span> <a name="line-470"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>k</span> <span class='hs-layout'>(</span><span class='hs-conid'>Chunks</span> <span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-varop'>>>==</span> <span class='hs-varid'>isolate</span> <span class='hs-layout'>(</span><span class='hs-varid'>n</span> <span class='hs-comment'>-</span> <span class='hs-varid'>len</span><span class='hs-layout'>)</span> <a name="line-471"></a> <span class='hs-keyword'>else</span> <span class='hs-keyword'>let</span> <a name="line-472"></a> <span class='hs-layout'>(</span><span class='hs-varid'>s1</span><span class='hs-layout'>,</span> <span class='hs-varid'>s2</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>BL</span><span class='hs-varop'>.</span><span class='hs-varid'>splitAt</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromInteger</span> <span class='hs-varid'>n</span><span class='hs-layout'>)</span> <span class='hs-varid'>lazy</span> <a name="line-473"></a> <span class='hs-keyword'>in</span> <span class='hs-varid'>k</span> <span class='hs-layout'>(</span><span class='hs-varid'>toChunks</span> <span class='hs-varid'>s1</span><span class='hs-layout'>)</span> <span class='hs-varop'>>>==</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>step</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>yield</span> <span class='hs-varid'>step</span> <span class='hs-layout'>(</span><span class='hs-varid'>toChunks</span> <span class='hs-varid'>s2</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <a name="line-474"></a> <span class='hs-varid'>loop</span> <span class='hs-conid'>EOF</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>k</span> <span class='hs-conid'>EOF</span> <span class='hs-varop'>>>==</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>step</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>yield</span> <span class='hs-varid'>step</span> <span class='hs-conid'>EOF</span><span class='hs-layout'>)</span> <a name="line-475"></a><span class='hs-definition'>isolate</span> <span class='hs-varid'>n</span> <span class='hs-varid'>step</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>drop</span> <span class='hs-varid'>n</span> <span class='hs-varop'>>></span> <span class='hs-varid'>return</span> <span class='hs-varid'>step</span> <a name="line-476"></a> <a name="line-477"></a> <a name="line-478"></a><span class='hs-comment'>-- | Split on bytes satisfying a given predicate.</span> <a name="line-479"></a><span class='hs-comment'>--</span> <a name="line-480"></a><span class='hs-comment'>-- Since: 0.4.8</span> <a name="line-481"></a> <a name="line-482"></a><a name="splitWhen"></a><span class='hs-definition'>splitWhen</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Monad</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=></span> <span class='hs-layout'>(</span><span class='hs-conid'>Word8</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'>Enumeratee</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-varid'>m</span> <span class='hs-varid'>b</span> <a name="line-483"></a><span class='hs-definition'>splitWhen</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>loop</span> <span class='hs-keyword'>where</span> <a name="line-484"></a> <span class='hs-varid'>loop</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>checkDone</span> <span class='hs-varid'>step</span> <a name="line-485"></a> <span class='hs-varid'>step</span> <span class='hs-varid'>k</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>isEOF</span> <span class='hs-varop'>>>=</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>eof</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>if</span> <span class='hs-varid'>eof</span> <a name="line-486"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>yield</span> <span class='hs-layout'>(</span><span class='hs-conid'>Continue</span> <span class='hs-varid'>k</span><span class='hs-layout'>)</span> <span class='hs-conid'>EOF</span> <a name="line-487"></a> <span class='hs-keyword'>else</span> <span class='hs-keyword'>do</span> <a name="line-488"></a> <span class='hs-varid'>lazy</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>takeWhile</span> <span class='hs-layout'>(</span><span class='hs-varid'>not</span> <span class='hs-varop'>.</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <a name="line-489"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>bytes</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-varid'>concat</span> <span class='hs-layout'>(</span><span class='hs-conid'>BL</span><span class='hs-varop'>.</span><span class='hs-varid'>toChunks</span> <span class='hs-varid'>lazy</span><span class='hs-layout'>)</span> <a name="line-490"></a> <span class='hs-varid'>eof</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>isEOF</span> <a name="line-491"></a> <span class='hs-varid'>drop</span> <span class='hs-num'>1</span> <a name="line-492"></a> <span class='hs-keyword'>if</span> <span class='hs-conid'>BL</span><span class='hs-varop'>.</span><span class='hs-varid'>null</span> <span class='hs-varid'>lazy</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>eof</span> <a name="line-493"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>yield</span> <span class='hs-layout'>(</span><span class='hs-conid'>Continue</span> <span class='hs-varid'>k</span><span class='hs-layout'>)</span> <span class='hs-conid'>EOF</span> <a name="line-494"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>k</span> <span class='hs-layout'>(</span><span class='hs-conid'>Chunks</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>bytes</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span> <span class='hs-varop'>>>==</span> <span class='hs-varid'>loop</span> <a name="line-495"></a> <a name="line-496"></a> <a name="line-497"></a> <a name="line-498"></a><span class='hs-comment'>-- | Read bytes (in chunks of the given buffer size) from the handle, and</span> <a name="line-499"></a><span class='hs-comment'>-- stream them to an 'Iteratee'. If an exception occurs during file IO,</span> <a name="line-500"></a><span class='hs-comment'>-- enumeration will stop and 'Error' will be returned. Exceptions from the</span> <a name="line-501"></a><span class='hs-comment'>-- iteratee are not caught.</span> <a name="line-502"></a><span class='hs-comment'>--</span> <a name="line-503"></a><span class='hs-comment'>-- This enumerator blocks until at least one byte is available from the</span> <a name="line-504"></a><span class='hs-comment'>-- handle, and might read less than the maximum buffer size in some</span> <a name="line-505"></a><span class='hs-comment'>-- cases.</span> <a name="line-506"></a><span class='hs-comment'>--</span> <a name="line-507"></a><span class='hs-comment'>-- The handle should be opened with no encoding, and in 'IO.ReadMode' or</span> <a name="line-508"></a><span class='hs-comment'>-- 'IO.ReadWriteMode'.</span> <a name="line-509"></a><span class='hs-comment'>--</span> <a name="line-510"></a><span class='hs-comment'>-- Since: 0.4.5</span> <a name="line-511"></a> <a name="line-512"></a><a name="enumHandle"></a><span class='hs-definition'>enumHandle</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>MonadIO</span> <span class='hs-varid'>m</span> <a name="line-513"></a> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Integer</span> <span class='hs-comment'>-- ^ Buffer size</span> <a name="line-514"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span><span class='hs-varop'>.</span><span class='hs-conid'>Handle</span> <a name="line-515"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Enumerator</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-varid'>m</span> <span class='hs-varid'>b</span> <a name="line-516"></a><span class='hs-definition'>enumHandle</span> <span class='hs-varid'>bufferSize</span> <span class='hs-varid'>h</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>checkContinue0</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>loop</span> <span class='hs-varid'>k</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span> <a name="line-517"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>intSize</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromInteger</span> <span class='hs-varid'>bufferSize</span> <a name="line-518"></a> <a name="line-519"></a> <span class='hs-varid'>bytes</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>tryIO</span> <span class='hs-layout'>(</span><span class='hs-varid'>getBytes</span> <span class='hs-varid'>h</span> <span class='hs-varid'>intSize</span><span class='hs-layout'>)</span> <a name="line-520"></a> <span class='hs-keyword'>if</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-varid'>null</span> <span class='hs-varid'>bytes</span> <a name="line-521"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>continue</span> <span class='hs-varid'>k</span> <a name="line-522"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>k</span> <span class='hs-layout'>(</span><span class='hs-conid'>Chunks</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>bytes</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span> <span class='hs-varop'>>>==</span> <span class='hs-varid'>loop</span> <a name="line-523"></a> <a name="line-524"></a> <a name="line-525"></a><span class='hs-comment'>-- | Read bytes (in chunks of the given buffer size) from the handle, and</span> <a name="line-526"></a><span class='hs-comment'>-- stream them to an 'Iteratee'. If an exception occurs during file IO,</span> <a name="line-527"></a><span class='hs-comment'>-- enumeration will stop and 'Error' will be returned. Exceptions from the</span> <a name="line-528"></a><span class='hs-comment'>-- iteratee are not caught.</span> <a name="line-529"></a><span class='hs-comment'>--</span> <a name="line-530"></a><span class='hs-comment'>-- This enumerator blocks until at least one byte is available from the</span> <a name="line-531"></a><span class='hs-comment'>-- handle, and might read less than the maximum buffer size in some</span> <a name="line-532"></a><span class='hs-comment'>-- cases.</span> <a name="line-533"></a><span class='hs-comment'>--</span> <a name="line-534"></a><span class='hs-comment'>-- The handle should be opened with no encoding, and in 'IO.ReadMode' or</span> <a name="line-535"></a><span class='hs-comment'>-- 'IO.ReadWriteMode'.</span> <a name="line-536"></a><span class='hs-comment'>--</span> <a name="line-537"></a><span class='hs-comment'>-- If an offset is specified, the handle will be seeked to that offset</span> <a name="line-538"></a><span class='hs-comment'>-- before reading. If the handle cannot be seeked, an error will be</span> <a name="line-539"></a><span class='hs-comment'>-- thrown.</span> <a name="line-540"></a><span class='hs-comment'>--</span> <a name="line-541"></a><span class='hs-comment'>-- If a maximum count is specified, the number of bytes read will not</span> <a name="line-542"></a><span class='hs-comment'>-- exceed that count.</span> <a name="line-543"></a><span class='hs-comment'>--</span> <a name="line-544"></a><span class='hs-comment'>-- Since: 0.4.8</span> <a name="line-545"></a> <a name="line-546"></a><a name="enumHandleRange"></a><span class='hs-definition'>enumHandleRange</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>MonadIO</span> <span class='hs-varid'>m</span> <a name="line-547"></a> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Integer</span> <span class='hs-comment'>-- ^ Buffer size</span> <a name="line-548"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-conid'>Integer</span> <span class='hs-comment'>-- ^ Offset</span> <a name="line-549"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-conid'>Integer</span> <span class='hs-comment'>-- ^ Maximum count</span> <a name="line-550"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span><span class='hs-varop'>.</span><span class='hs-conid'>Handle</span> <a name="line-551"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Enumerator</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-varid'>m</span> <span class='hs-varid'>b</span> <a name="line-552"></a><span class='hs-definition'>enumHandleRange</span> <span class='hs-varid'>bufferSize</span> <span class='hs-varid'>offset</span> <span class='hs-varid'>count</span> <span class='hs-varid'>h</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>seek</span> <span class='hs-varop'>>></span> <span class='hs-varid'>enum</span> <span class='hs-keyword'>where</span> <a name="line-553"></a> <span class='hs-varid'>seek</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>offset</span> <span class='hs-keyword'>of</span> <a name="line-554"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-conid'>()</span> <a name="line-555"></a> <span class='hs-conid'>Just</span> <span class='hs-varid'>off</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>tryIO</span> <span class='hs-layout'>(</span><span class='hs-conid'>IO</span><span class='hs-varop'>.</span><span class='hs-varid'>hSeek</span> <span class='hs-varid'>h</span> <span class='hs-conid'>IO</span><span class='hs-varop'>.</span><span class='hs-conid'>AbsoluteSeek</span> <span class='hs-varid'>off</span><span class='hs-layout'>)</span> <a name="line-556"></a> <a name="line-557"></a> <span class='hs-varid'>enum</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>count</span> <span class='hs-keyword'>of</span> <a name="line-558"></a> <span class='hs-conid'>Just</span> <span class='hs-varid'>n</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>enumRange</span> <span class='hs-varid'>n</span> <span class='hs-varid'>s</span> <a name="line-559"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>enumHandle</span> <span class='hs-varid'>bufferSize</span> <span class='hs-varid'>h</span> <span class='hs-varid'>s</span> <a name="line-560"></a> <a name="line-561"></a> <span class='hs-varid'>enumRange</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>checkContinue1</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>loop</span> <span class='hs-varid'>n</span> <span class='hs-varid'>k</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>let</span> <a name="line-562"></a> <span class='hs-varid'>rem</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromInteger</span> <span class='hs-layout'>(</span><span class='hs-varid'>min</span> <span class='hs-varid'>bufferSize</span> <span class='hs-varid'>n</span><span class='hs-layout'>)</span> <a name="line-563"></a> <span class='hs-varid'>keepGoing</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <a name="line-564"></a> <span class='hs-varid'>bytes</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>tryIO</span> <span class='hs-layout'>(</span><span class='hs-varid'>getBytes</span> <span class='hs-varid'>h</span> <span class='hs-varid'>rem</span><span class='hs-layout'>)</span> <a name="line-565"></a> <span class='hs-keyword'>if</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-varid'>null</span> <span class='hs-varid'>bytes</span> <a name="line-566"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>continue</span> <span class='hs-varid'>k</span> <a name="line-567"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>feed</span> <span class='hs-varid'>bytes</span> <a name="line-568"></a> <span class='hs-varid'>feed</span> <span class='hs-varid'>bs</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>k</span> <span class='hs-layout'>(</span><span class='hs-conid'>Chunks</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>bs</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span> <span class='hs-varop'>>>==</span> <span class='hs-varid'>loop</span> <span class='hs-layout'>(</span><span class='hs-varid'>n</span> <span class='hs-comment'>-</span> <span class='hs-layout'>(</span><span class='hs-varid'>toInteger</span> <span class='hs-layout'>(</span><span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-varid'>length</span> <span class='hs-varid'>bs</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <a name="line-569"></a> <span class='hs-keyword'>in</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>rem</span> <span class='hs-varop'><=</span> <span class='hs-num'>0</span> <a name="line-570"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>continue</span> <span class='hs-varid'>k</span> <a name="line-571"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>keepGoing</span> <a name="line-572"></a> <a name="line-573"></a><a name="getBytes"></a><span class='hs-definition'>getBytes</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span><span class='hs-varop'>.</span><span class='hs-conid'>Handle</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'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <a name="line-574"></a><span class='hs-definition'>getBytes</span> <span class='hs-varid'>h</span> <span class='hs-varid'>n</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <a name="line-575"></a> <span class='hs-varid'>hasInput</span> <span class='hs-keyglyph'><-</span> <span class='hs-conid'>Exc</span><span class='hs-varop'>.</span><span class='hs-varid'>catch</span> <a name="line-576"></a> <span class='hs-layout'>(</span><span class='hs-conid'>IO</span><span class='hs-varop'>.</span><span class='hs-varid'>hWaitForInput</span> <span class='hs-varid'>h</span> <span class='hs-layout'>(</span><span class='hs-comment'>-</span><span class='hs-num'>1</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <a name="line-577"></a> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>err</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>if</span> <span class='hs-varid'>isEOFError</span> <span class='hs-varid'>err</span> <a name="line-578"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>return</span> <span class='hs-conid'>False</span> <a name="line-579"></a> <span class='hs-keyword'>else</span> <span class='hs-conid'>Exc</span><span class='hs-varop'>.</span><span class='hs-varid'>throwIO</span> <span class='hs-varid'>err</span><span class='hs-layout'>)</span> <a name="line-580"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>hasInput</span> <a name="line-581"></a> <span class='hs-keyword'>then</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-varid'>hGetNonBlocking</span> <span class='hs-varid'>h</span> <span class='hs-varid'>n</span> <a name="line-582"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>return</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-varid'>empty</span> <a name="line-583"></a> <a name="line-584"></a> <a name="line-585"></a><span class='hs-comment'>-- | Opens a file path in binary mode, and passes the handle to</span> <a name="line-586"></a><span class='hs-comment'>-- 'enumHandle'. The file will be closed when enumeration finishes.</span> <a name="line-587"></a><span class='hs-comment'>--</span> <a name="line-588"></a><span class='hs-comment'>-- Since: 0.4.5</span> <a name="line-589"></a> <a name="line-590"></a><a name="enumFile"></a><span class='hs-definition'>enumFile</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FilePath</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Enumerator</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-conid'>IO</span> <span class='hs-varid'>b</span> <a name="line-591"></a><span class='hs-definition'>enumFile</span> <span class='hs-varid'>path</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>enumFileRange</span> <span class='hs-varid'>path</span> <span class='hs-conid'>Nothing</span> <span class='hs-conid'>Nothing</span> <a name="line-592"></a> <a name="line-593"></a> <a name="line-594"></a><span class='hs-comment'>-- | Opens a file path in binary mode, and passes the handle to</span> <a name="line-595"></a><span class='hs-comment'>-- 'enumHandleRange'. The file will be closed when enumeration finishes.</span> <a name="line-596"></a><span class='hs-comment'>--</span> <a name="line-597"></a><span class='hs-comment'>-- Since: 0.4.8</span> <a name="line-598"></a> <a name="line-599"></a><a name="enumFileRange"></a><span class='hs-definition'>enumFileRange</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FilePath</span> <a name="line-600"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-conid'>Integer</span> <span class='hs-comment'>-- ^ Offset</span> <a name="line-601"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-conid'>Integer</span> <span class='hs-comment'>-- ^ Maximum count</span> <a name="line-602"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Enumerator</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-conid'>IO</span> <span class='hs-varid'>b</span> <a name="line-603"></a><span class='hs-definition'>enumFileRange</span> <span class='hs-varid'>path</span> <span class='hs-varid'>offset</span> <span class='hs-varid'>count</span> <span class='hs-varid'>step</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <a name="line-604"></a> <span class='hs-varid'>h</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>tryIO</span> <span class='hs-layout'>(</span><span class='hs-conid'>IO</span><span class='hs-varop'>.</span><span class='hs-varid'>openBinaryFile</span> <span class='hs-varid'>path</span> <span class='hs-conid'>IO</span><span class='hs-varop'>.</span><span class='hs-conid'>ReadMode</span><span class='hs-layout'>)</span> <a name="line-605"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>iter</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>enumHandleRange</span> <span class='hs-num'>4096</span> <span class='hs-varid'>offset</span> <span class='hs-varid'>count</span> <span class='hs-varid'>h</span> <span class='hs-varid'>step</span> <a name="line-606"></a> <span class='hs-conid'>Iteratee</span> <span class='hs-layout'>(</span><span class='hs-conid'>Exc</span><span class='hs-varop'>.</span><span class='hs-varid'>finally</span> <span class='hs-layout'>(</span><span class='hs-varid'>runIteratee</span> <span class='hs-varid'>iter</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>IO</span><span class='hs-varop'>.</span><span class='hs-varid'>hClose</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <a name="line-607"></a> <a name="line-608"></a> <a name="line-609"></a><span class='hs-comment'>-- | Read bytes from a stream and write them to a handle. If an exception</span> <a name="line-610"></a><span class='hs-comment'>-- occurs during file IO, enumeration will stop and 'Error' will be</span> <a name="line-611"></a><span class='hs-comment'>-- returned.</span> <a name="line-612"></a><span class='hs-comment'>--</span> <a name="line-613"></a><span class='hs-comment'>-- The handle should be opened with no encoding, and in 'IO.WriteMode' or</span> <a name="line-614"></a><span class='hs-comment'>-- 'IO.ReadWriteMode'.</span> <a name="line-615"></a><span class='hs-comment'>--</span> <a name="line-616"></a><span class='hs-comment'>-- Since: 0.4.5</span> <a name="line-617"></a> <a name="line-618"></a><a name="iterHandle"></a><span class='hs-definition'>iterHandle</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>MonadIO</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>IO</span><span class='hs-varop'>.</span><span class='hs-conid'>Handle</span> <a name="line-619"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Iteratee</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-varid'>m</span> <span class='hs-conid'>()</span> <a name="line-620"></a><span class='hs-definition'>iterHandle</span> <span class='hs-varid'>h</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>continue</span> <span class='hs-varid'>step</span> <span class='hs-keyword'>where</span> <a name="line-621"></a> <span class='hs-varid'>step</span> <span class='hs-conid'>EOF</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>yield</span> <span class='hs-conid'>()</span> <span class='hs-conid'>EOF</span> <a name="line-622"></a> <span class='hs-varid'>step</span> <span class='hs-layout'>(</span><span class='hs-conid'>Chunks</span> <span class='hs-conid'>[]</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>continue</span> <span class='hs-varid'>step</span> <a name="line-623"></a> <span class='hs-varid'>step</span> <span class='hs-layout'>(</span><span class='hs-conid'>Chunks</span> <span class='hs-varid'>bytes</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <a name="line-624"></a> <span class='hs-varid'>tryIO</span> <span class='hs-layout'>(</span><span class='hs-conid'>CM</span><span class='hs-varop'>.</span><span class='hs-varid'>mapM_</span> <span class='hs-layout'>(</span><span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-varid'>hPut</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span> <span class='hs-varid'>bytes</span><span class='hs-layout'>)</span> <a name="line-625"></a> <span class='hs-varid'>continue</span> <span class='hs-varid'>step</span> <a name="line-626"></a> <a name="line-627"></a> <a name="line-628"></a><a name="toChunks"></a><span class='hs-definition'>toChunks</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>BL</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Stream</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <a name="line-629"></a><span class='hs-definition'>toChunks</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Chunks</span> <span class='hs-varop'>.</span> <span class='hs-conid'>BL</span><span class='hs-varop'>.</span><span class='hs-varid'>toChunks</span> </pre></body> </html>
distrib
>
Fedora
>
14
>
x86_64
>
media
>
updates
>
by-pkgid
>
0b5d03d6b0fe6eec9f6a8cc33941032f
>
files
>
48
