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<pre><a name="line-1"></a><span class='hs-comment'>{-# LANGUAGE BangPatterns, ForeignFunctionInterface, CPP, ScopedTypeVariables #-}</span>
<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 : ByteStringUtils</span>
<a name="line-6"></a><span class='hs-comment'>-- Copyright : (c) The University of Glasgow 2001,</span>
<a name="line-7"></a><span class='hs-comment'>-- David Roundy 2003-2005</span>
<a name="line-8"></a><span class='hs-comment'>-- License : GPL (I'm happy to also license this file BSD style but don't</span>
<a name="line-9"></a><span class='hs-comment'>-- want to bother distributing two license files with darcs.</span>
<a name="line-10"></a><span class='hs-comment'>--</span>
<a name="line-11"></a><span class='hs-comment'>-- Maintainer : droundy@abridgegame.org</span>
<a name="line-12"></a><span class='hs-comment'>-- Stability : experimental</span>
<a name="line-13"></a><span class='hs-comment'>-- Portability : portable</span>
<a name="line-14"></a><span class='hs-comment'>--</span>
<a name="line-15"></a><span class='hs-comment'>-- GZIp and MMap IO for ByteStrings, encoding utilities, and miscellaneous</span>
<a name="line-16"></a><span class='hs-comment'>-- functions for Data.ByteString</span>
<a name="line-17"></a><span class='hs-comment'>--</span>
<a name="line-18"></a>
<a name="line-19"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>ByteStringUtils</span> <span class='hs-layout'>(</span>
<a name="line-20"></a>
<a name="line-21"></a> <span class='hs-varid'>unsafeWithInternals</span><span class='hs-layout'>,</span>
<a name="line-22"></a> <span class='hs-varid'>unpackPSFromUTF8</span><span class='hs-layout'>,</span>
<a name="line-23"></a> <span class='hs-varid'>packStringToUTF8</span><span class='hs-layout'>,</span>
<a name="line-24"></a>
<a name="line-25"></a> <span class='hs-comment'>-- IO with mmap or gzip</span>
<a name="line-26"></a> <span class='hs-varid'>gzReadFilePS</span><span class='hs-layout'>,</span>
<a name="line-27"></a> <span class='hs-varid'>mmapFilePS</span><span class='hs-layout'>,</span>
<a name="line-28"></a> <span class='hs-varid'>gzWriteFilePS</span><span class='hs-layout'>,</span>
<a name="line-29"></a> <span class='hs-varid'>gzWriteFilePSs</span><span class='hs-layout'>,</span>
<a name="line-30"></a> <span class='hs-varid'>gzReadStdin</span><span class='hs-layout'>,</span>
<a name="line-31"></a>
<a name="line-32"></a> <span class='hs-comment'>-- gzip handling</span>
<a name="line-33"></a> <span class='hs-varid'>isGZFile</span><span class='hs-layout'>,</span>
<a name="line-34"></a> <span class='hs-varid'>gzDecompress</span><span class='hs-layout'>,</span>
<a name="line-35"></a>
<a name="line-36"></a> <span class='hs-comment'>-- list utilities</span>
<a name="line-37"></a> <span class='hs-varid'>dropSpace</span><span class='hs-layout'>,</span>
<a name="line-38"></a> <span class='hs-varid'>breakSpace</span><span class='hs-layout'>,</span>
<a name="line-39"></a> <span class='hs-varid'>linesPS</span><span class='hs-layout'>,</span>
<a name="line-40"></a> <span class='hs-varid'>unlinesPS</span><span class='hs-layout'>,</span>
<a name="line-41"></a> <span class='hs-varid'>hashPS</span><span class='hs-layout'>,</span>
<a name="line-42"></a> <span class='hs-varid'>breakFirstPS</span><span class='hs-layout'>,</span>
<a name="line-43"></a> <span class='hs-varid'>breakLastPS</span><span class='hs-layout'>,</span>
<a name="line-44"></a> <span class='hs-varid'>substrPS</span><span class='hs-layout'>,</span>
<a name="line-45"></a> <span class='hs-varid'>readIntPS</span><span class='hs-layout'>,</span>
<a name="line-46"></a> <span class='hs-varid'>isFunky</span><span class='hs-layout'>,</span>
<a name="line-47"></a> <span class='hs-varid'>fromHex2PS</span><span class='hs-layout'>,</span>
<a name="line-48"></a> <span class='hs-varid'>fromPS2Hex</span><span class='hs-layout'>,</span>
<a name="line-49"></a> <span class='hs-varid'>betweenLinesPS</span><span class='hs-layout'>,</span>
<a name="line-50"></a> <span class='hs-varid'>breakAfterNthNewline</span><span class='hs-layout'>,</span>
<a name="line-51"></a> <span class='hs-varid'>breakBeforeNthNewline</span><span class='hs-layout'>,</span>
<a name="line-52"></a> <span class='hs-varid'>intercalate</span><span class='hs-layout'>,</span>
<a name="line-53"></a>
<a name="line-54"></a> <span class='hs-comment'>-- encoding and unicode utilities</span>
<a name="line-55"></a> <span class='hs-varid'>isAscii</span><span class='hs-layout'>,</span>
<a name="line-56"></a> <span class='hs-varid'>decodeLocale</span><span class='hs-layout'>,</span>
<a name="line-57"></a> <span class='hs-varid'>encodeLocale</span><span class='hs-layout'>,</span>
<a name="line-58"></a> <span class='hs-varid'>decodeString</span>
<a name="line-59"></a> <span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-60"></a>
<a name="line-61"></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'>catch</span> <span class='hs-layout'>)</span>
<a name="line-62"></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-63"></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'>Char8</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>BC</span>
<a name="line-64"></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'>Internal</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>BI</span>
<a name="line-65"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-layout'>(</span><span class='hs-varid'>intercalate</span><span class='hs-layout'>)</span>
<a name="line-66"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span><span class='hs-varop'>.</span><span class='hs-conid'>Internal</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromForeignPtr</span><span class='hs-layout'>)</span>
<a name="line-67"></a>
<a name="line-68"></a><span class='hs-cpp'>#if defined (HAVE_MMAP)</span>
<a name="line-69"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Exception</span><span class='hs-varop'>.</span><span class='hs-conid'>Extensible</span> <span class='hs-layout'>(</span> <span class='hs-varid'>catch</span><span class='hs-layout'>,</span> <span class='hs-conid'>SomeException</span> <span class='hs-layout'>)</span>
<a name="line-70"></a><span class='hs-cpp'>#endif</span>
<a name="line-71"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>IO</span>
<a name="line-72"></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'>Unsafe</span> <span class='hs-layout'>(</span> <span class='hs-varid'>unsafePerformIO</span> <span class='hs-layout'>)</span>
<a name="line-73"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>Console</span><span class='hs-varop'>.</span><span class='hs-conid'>Haskeline</span> <span class='hs-layout'>(</span> <span class='hs-conid'>InputT</span><span class='hs-layout'>,</span> <span class='hs-varid'>runInputTBehavior</span><span class='hs-layout'>,</span> <span class='hs-varid'>defaultSettings</span><span class='hs-layout'>,</span> <span class='hs-varid'>useFileHandle</span> <span class='hs-layout'>)</span>
<a name="line-74"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>Console</span><span class='hs-varop'>.</span><span class='hs-conid'>Haskeline</span><span class='hs-varop'>.</span><span class='hs-conid'>Encoding</span> <span class='hs-layout'>(</span> <span class='hs-varid'>decode</span><span class='hs-layout'>,</span> <span class='hs-varid'>encode</span> <span class='hs-layout'>)</span>
<a name="line-75"></a>
<a name="line-76"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Foreign</span><span class='hs-varop'>.</span><span class='hs-conid'>Storable</span> <span class='hs-layout'>(</span> <span class='hs-varid'>peekElemOff</span><span class='hs-layout'>,</span> <span class='hs-varid'>peek</span> <span class='hs-layout'>)</span>
<a name="line-77"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Foreign</span><span class='hs-varop'>.</span><span class='hs-conid'>Marshal</span><span class='hs-varop'>.</span><span class='hs-conid'>Array</span> <span class='hs-layout'>(</span> <span class='hs-varid'>advancePtr</span> <span class='hs-layout'>)</span>
<a name="line-78"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Foreign</span><span class='hs-varop'>.</span><span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-conid'>Types</span> <span class='hs-layout'>(</span> <span class='hs-conid'>CInt</span> <span class='hs-layout'>)</span>
<a name="line-79"></a>
<a name="line-80"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Bits</span> <span class='hs-layout'>(</span> <span class='hs-varid'>rotateL</span> <span class='hs-layout'>)</span>
<a name="line-81"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Char</span> <span class='hs-layout'>(</span> <span class='hs-varid'>ord</span><span class='hs-layout'>,</span> <span class='hs-varid'>isSpace</span> <span class='hs-layout'>)</span>
<a name="line-82"></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-83"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Int</span> <span class='hs-layout'>(</span> <span class='hs-conid'>Int32</span> <span class='hs-layout'>)</span>
<a name="line-84"></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'>Text</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>T</span> <span class='hs-layout'>(</span> <span class='hs-varid'>pack</span><span class='hs-layout'>,</span> <span class='hs-varid'>unpack</span> <span class='hs-layout'>)</span>
<a name="line-85"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Text</span><span class='hs-varop'>.</span><span class='hs-conid'>Encoding</span> <span class='hs-layout'>(</span> <span class='hs-varid'>encodeUtf8</span><span class='hs-layout'>,</span> <span class='hs-varid'>decodeUtf8With</span> <span class='hs-layout'>)</span>
<a name="line-86"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Text</span><span class='hs-varop'>.</span><span class='hs-conid'>Encoding</span><span class='hs-varop'>.</span><span class='hs-conid'>Error</span> <span class='hs-layout'>(</span> <span class='hs-varid'>lenientDecode</span> <span class='hs-layout'>)</span>
<a name="line-87"></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'>when</span> <span class='hs-layout'>)</span>
<a name="line-88"></a>
<a name="line-89"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Foreign</span><span class='hs-varop'>.</span><span class='hs-conid'>Ptr</span> <span class='hs-layout'>(</span> <span class='hs-varid'>plusPtr</span><span class='hs-layout'>,</span> <span class='hs-conid'>Ptr</span> <span class='hs-layout'>)</span>
<a name="line-90"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Foreign</span><span class='hs-varop'>.</span><span class='hs-conid'>ForeignPtr</span> <span class='hs-layout'>(</span> <span class='hs-varid'>withForeignPtr</span> <span class='hs-layout'>)</span>
<a name="line-91"></a>
<a name="line-92"></a><span class='hs-cpp'>#ifdef DEBUG_PS</span>
<a name="line-93"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Foreign</span><span class='hs-varop'>.</span><span class='hs-conid'>ForeignPtr</span> <span class='hs-layout'>(</span> <span class='hs-varid'>addForeignPtrFinalizer</span> <span class='hs-layout'>)</span>
<a name="line-94"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Foreign</span><span class='hs-varop'>.</span><span class='hs-conid'>Ptr</span> <span class='hs-layout'>(</span> <span class='hs-conid'>FunPtr</span> <span class='hs-layout'>)</span>
<a name="line-95"></a><span class='hs-cpp'>#endif</span>
<a name="line-96"></a>
<a name="line-97"></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-98"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Codec</span><span class='hs-varop'>.</span><span class='hs-conid'>Compression</span><span class='hs-varop'>.</span><span class='hs-conid'>GZip</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>GZ</span>
<a name="line-99"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Codec</span><span class='hs-varop'>.</span><span class='hs-conid'>Compression</span><span class='hs-varop'>.</span><span class='hs-conid'>Zlib</span><span class='hs-varop'>.</span><span class='hs-conid'>Internal</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>ZI</span>
<a name="line-100"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Darcs</span><span class='hs-varop'>.</span><span class='hs-conid'>Global</span> <span class='hs-layout'>(</span> <span class='hs-varid'>addCRCWarning</span> <span class='hs-layout'>)</span>
<a name="line-101"></a>
<a name="line-102"></a><span class='hs-cpp'>#ifdef HAVE_MMAP</span>
<a name="line-103"></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'>MMap</span><span class='hs-layout'>(</span> <span class='hs-varid'>mmapFileByteString</span> <span class='hs-layout'>)</span>
<a name="line-104"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>Mem</span><span class='hs-layout'>(</span> <span class='hs-varid'>performGC</span> <span class='hs-layout'>)</span>
<a name="line-105"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>Posix</span><span class='hs-varop'>.</span><span class='hs-conid'>Files</span><span class='hs-layout'>(</span> <span class='hs-varid'>fileSize</span><span class='hs-layout'>,</span> <span class='hs-varid'>getSymbolicLinkStatus</span> <span class='hs-layout'>)</span>
<a name="line-106"></a><span class='hs-cpp'>#endif</span>
<a name="line-107"></a>
<a name="line-108"></a><span class='hs-comment'>-- -----------------------------------------------------------------------------</span>
<a name="line-109"></a><span class='hs-comment'>-- obsolete debugging code</span>
<a name="line-110"></a>
<a name="line-111"></a><span class='hs-comment'>-- -----------------------------------------------------------------------------</span>
<a name="line-112"></a><span class='hs-comment'>-- unsafeWithInternals</span>
<a name="line-113"></a>
<a name="line-114"></a><a name="unsafeWithInternals"></a><span class='hs-comment'>-- | Do something with the internals of a PackedString. Beware of</span>
<a name="line-115"></a><span class='hs-comment'>-- altering the contents!</span>
<a name="line-116"></a><span class='hs-definition'>unsafeWithInternals</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-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>Word8</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>a</span>
<a name="line-117"></a><span class='hs-definition'>unsafeWithInternals</span> <span class='hs-varid'>ps</span> <span class='hs-varid'>f</span>
<a name="line-118"></a> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-conid'>BI</span><span class='hs-varop'>.</span><span class='hs-varid'>toForeignPtr</span> <span class='hs-varid'>ps</span> <span class='hs-keyword'>of</span>
<a name="line-119"></a> <span class='hs-layout'>(</span><span class='hs-varid'>fp</span><span class='hs-layout'>,</span><span class='hs-varid'>s</span><span class='hs-layout'>,</span><span class='hs-varid'>l</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>withForeignPtr</span> <span class='hs-varid'>fp</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>p</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-varid'>p</span> <span class='hs-varop'>`plusPtr`</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-varid'>l</span>
<a name="line-120"></a>
<a name="line-121"></a><span class='hs-comment'>-- | readIntPS skips any whitespace at the beginning of its argument, and</span>
<a name="line-122"></a><span class='hs-comment'>-- reads an Int from the beginning of the PackedString. If there is no</span>
<a name="line-123"></a><span class='hs-comment'>-- integer at the beginning of the string, it returns Nothing, otherwise it</span>
<a name="line-124"></a><span class='hs-comment'>-- just returns the int read, along with a B.ByteString containing the</span>
<a name="line-125"></a><span class='hs-comment'>-- remainder of its input.</span>
<a name="line-126"></a>
<a name="line-127"></a><a name="readIntPS"></a><span class='hs-definition'>readIntPS</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-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-layout'>(</span><span class='hs-conid'>Int</span><span class='hs-layout'>,</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span><span class='hs-layout'>)</span>
<a name="line-128"></a><span class='hs-definition'>readIntPS</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>BC</span><span class='hs-varop'>.</span><span class='hs-varid'>readInt</span> <span class='hs-varop'>.</span> <span class='hs-conid'>BC</span><span class='hs-varop'>.</span><span class='hs-varid'>dropWhile</span> <span class='hs-varid'>isSpace</span>
<a name="line-129"></a>
<a name="line-130"></a><span class='hs-comment'>-- -----------------------------------------------------------------------------</span>
<a name="line-131"></a><span class='hs-comment'>-- Destructor functions (taking PackedStrings apart)</span>
<a name="line-132"></a>
<a name="line-133"></a><a name="unpackPSFromUTF8"></a><span class='hs-comment'>-- | Decodes a 'ByteString' containing UTF-8 to a 'String'. Decoding errors are</span>
<a name="line-134"></a><span class='hs-comment'>-- flagged with the U+FFFD character.</span>
<a name="line-135"></a><span class='hs-definition'>unpackPSFromUTF8</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-keyglyph'>-></span> <span class='hs-conid'>String</span>
<a name="line-136"></a><span class='hs-definition'>unpackPSFromUTF8</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-varid'>unpack</span> <span class='hs-varop'>.</span> <span class='hs-varid'>decodeUtf8With</span> <span class='hs-varid'>lenientDecode</span>
<a name="line-137"></a>
<a name="line-138"></a><a name="packStringToUTF8"></a><span class='hs-definition'>packStringToUTF8</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span>
<a name="line-139"></a><span class='hs-definition'>packStringToUTF8</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>encodeUtf8</span> <span class='hs-varop'>.</span> <span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-varid'>pack</span>
<a name="line-140"></a>
<a name="line-141"></a><span class='hs-comment'>------------------------------------------------------------------------</span>
<a name="line-142"></a><span class='hs-comment'>-- A reimplementation of Data.ByteString.Char8.dropSpace, but</span>
<a name="line-143"></a><span class='hs-comment'>-- specialised to darcs' need for a 4 way isspace.</span>
<a name="line-144"></a><span class='hs-comment'>--</span>
<a name="line-145"></a><span class='hs-comment'>-- TODO: if it is safe to use the expanded definition of isSpaceWord8</span>
<a name="line-146"></a><span class='hs-comment'>-- provided by Data.ByteString.Char8, then all this can go.</span>
<a name="line-147"></a>
<a name="line-148"></a><a name="isSpaceWord8"></a><span class='hs-comment'>-- A locale-independent isspace(3) so patches are interpreted the same everywhere.</span>
<a name="line-149"></a><span class='hs-comment'>-- ((c) == ' ' || (c) == '\t' || (c) == '\n' || (c) == '\r')</span>
<a name="line-150"></a><span class='hs-definition'>isSpaceWord8</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Word8</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span>
<a name="line-151"></a><span class='hs-definition'>isSpaceWord8</span> <span class='hs-varid'>w</span> <span class='hs-keyglyph'>=</span>
<a name="line-152"></a> <span class='hs-varid'>w</span> <span class='hs-varop'>==</span> <span class='hs-num'>0x20</span> <span class='hs-varop'>||</span> <span class='hs-comment'>-- ' '</span>
<a name="line-153"></a> <span class='hs-varid'>w</span> <span class='hs-varop'>==</span> <span class='hs-num'>0x09</span> <span class='hs-varop'>||</span> <span class='hs-comment'>-- '\t'</span>
<a name="line-154"></a> <span class='hs-varid'>w</span> <span class='hs-varop'>==</span> <span class='hs-num'>0x0A</span> <span class='hs-varop'>||</span> <span class='hs-comment'>-- '\n'</span>
<a name="line-155"></a> <span class='hs-varid'>w</span> <span class='hs-varop'>==</span> <span class='hs-num'>0x0D</span> <span class='hs-comment'>-- '\r'</span>
<a name="line-156"></a><span class='hs-comment'>{-# INLINE isSpaceWord8 #-}</span>
<a name="line-157"></a>
<a name="line-158"></a><a name="firstnonspace"></a><span class='hs-definition'>firstnonspace</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>Word8</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Int</span>
<a name="line-159"></a><a name="!"></a><span class='hs-definition'>firstnonspace</span> <span class='hs-varop'>!</span><span class='hs-varid'>ptr</span> <span class='hs-varop'>!</span><span class='hs-varid'>n</span> <span class='hs-varop'>!</span><span class='hs-varid'>m</span>
<a name="line-160"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>n</span> <span class='hs-varop'>>=</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-varid'>n</span>
<a name="line-161"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>w</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>peekElemOff</span> <span class='hs-varid'>ptr</span> <span class='hs-varid'>n</span>
<a name="line-162"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>isSpaceWord8</span> <span class='hs-varid'>w</span> <span class='hs-keyword'>then</span> <span class='hs-varid'>firstnonspace</span> <span class='hs-varid'>ptr</span> <span class='hs-layout'>(</span><span class='hs-varid'>n</span><span class='hs-varop'>+</span><span class='hs-num'>1</span><span class='hs-layout'>)</span> <span class='hs-varid'>m</span> <span class='hs-keyword'>else</span> <span class='hs-varid'>return</span> <span class='hs-varid'>n</span>
<a name="line-163"></a>
<a name="line-164"></a><a name="firstspace"></a><span class='hs-definition'>firstspace</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>Word8</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Int</span>
<a name="line-165"></a><span class='hs-definition'>firstspace</span> <span class='hs-varop'>!</span><span class='hs-varid'>ptr</span> <span class='hs-varop'>!</span><span class='hs-varid'>n</span> <span class='hs-varop'>!</span><span class='hs-varid'>m</span>
<a name="line-166"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>n</span> <span class='hs-varop'>>=</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-varid'>n</span>
<a name="line-167"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>w</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>peekElemOff</span> <span class='hs-varid'>ptr</span> <span class='hs-varid'>n</span>
<a name="line-168"></a> <span class='hs-keyword'>if</span> <span class='hs-layout'>(</span><span class='hs-varid'>not</span> <span class='hs-varop'>.</span> <span class='hs-varid'>isSpaceWord8</span><span class='hs-layout'>)</span> <span class='hs-varid'>w</span> <span class='hs-keyword'>then</span> <span class='hs-varid'>firstspace</span> <span class='hs-varid'>ptr</span> <span class='hs-layout'>(</span><span class='hs-varid'>n</span><span class='hs-varop'>+</span><span class='hs-num'>1</span><span class='hs-layout'>)</span> <span class='hs-varid'>m</span> <span class='hs-keyword'>else</span> <span class='hs-varid'>return</span> <span class='hs-varid'>n</span>
<a name="line-169"></a>
<a name="line-170"></a><a name="dropSpace"></a><span class='hs-comment'>-- | 'dropSpace' efficiently returns the 'ByteString' argument with</span>
<a name="line-171"></a><span class='hs-comment'>-- white space Chars removed from the front. It is more efficient than</span>
<a name="line-172"></a><span class='hs-comment'>-- calling dropWhile for removing whitespace. I.e.</span>
<a name="line-173"></a><span class='hs-comment'>--</span>
<a name="line-174"></a><span class='hs-comment'>-- > dropWhile isSpace == dropSpace</span>
<a name="line-175"></a><span class='hs-comment'>--</span>
<a name="line-176"></a><span class='hs-definition'>dropSpace</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-keyglyph'>-></span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span>
<a name="line-177"></a><span class='hs-definition'>dropSpace</span> <span class='hs-layout'>(</span><span class='hs-conid'>BI</span><span class='hs-varop'>.</span><span class='hs-conid'>PS</span> <span class='hs-varid'>x</span> <span class='hs-varid'>s</span> <span class='hs-varid'>l</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>BI</span><span class='hs-varop'>.</span><span class='hs-varid'>inlinePerformIO</span> <span class='hs-varop'>$</span> <span class='hs-varid'>withForeignPtr</span> <span class='hs-varid'>x</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>p</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-178"></a> <span class='hs-varid'>i</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>firstnonspace</span> <span class='hs-layout'>(</span><span class='hs-varid'>p</span> <span class='hs-varop'>`plusPtr`</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-num'>0</span> <span class='hs-varid'>l</span>
<a name="line-179"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$!</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>i</span> <span class='hs-varop'>==</span> <span class='hs-varid'>l</span> <span class='hs-keyword'>then</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-varid'>empty</span> <span class='hs-keyword'>else</span> <span class='hs-conid'>BI</span><span class='hs-varop'>.</span><span class='hs-conid'>PS</span> <span class='hs-varid'>x</span> <span class='hs-layout'>(</span><span class='hs-varid'>s</span><span class='hs-varop'>+</span><span class='hs-varid'>i</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>l</span><span class='hs-comment'>-</span><span class='hs-varid'>i</span><span class='hs-layout'>)</span>
<a name="line-180"></a><span class='hs-comment'>{-# INLINE dropSpace #-}</span>
<a name="line-181"></a>
<a name="line-182"></a><a name="breakSpace"></a><span class='hs-comment'>-- | 'breakSpace' returns the pair of ByteStrings when the argument is</span>
<a name="line-183"></a><span class='hs-comment'>-- broken at the first whitespace byte. I.e.</span>
<a name="line-184"></a><span class='hs-comment'>--</span>
<a name="line-185"></a><span class='hs-comment'>-- > break isSpace == breakSpace</span>
<a name="line-186"></a><span class='hs-comment'>--</span>
<a name="line-187"></a><span class='hs-definition'>breakSpace</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-keyglyph'>-></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-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span><span class='hs-layout'>)</span>
<a name="line-188"></a><span class='hs-definition'>breakSpace</span> <span class='hs-layout'>(</span><span class='hs-conid'>BI</span><span class='hs-varop'>.</span><span class='hs-conid'>PS</span> <span class='hs-varid'>x</span> <span class='hs-varid'>s</span> <span class='hs-varid'>l</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>BI</span><span class='hs-varop'>.</span><span class='hs-varid'>inlinePerformIO</span> <span class='hs-varop'>$</span> <span class='hs-varid'>withForeignPtr</span> <span class='hs-varid'>x</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>p</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-189"></a> <span class='hs-varid'>i</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>firstspace</span> <span class='hs-layout'>(</span><span class='hs-varid'>p</span> <span class='hs-varop'>`plusPtr`</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-num'>0</span> <span class='hs-varid'>l</span>
<a name="line-190"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$!</span> <span class='hs-keyword'>case</span> <span class='hs-conid'>()</span> <span class='hs-keyword'>of</span> <span class='hs-layout'>{</span><span class='hs-keyword'>_</span>
<a name="line-191"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>i</span> <span class='hs-varop'>==</span> <span class='hs-num'>0</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-varid'>empty</span><span class='hs-layout'>,</span> <span class='hs-conid'>BI</span><span class='hs-varop'>.</span><span class='hs-conid'>PS</span> <span class='hs-varid'>x</span> <span class='hs-varid'>s</span> <span class='hs-varid'>l</span><span class='hs-layout'>)</span>
<a name="line-192"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>i</span> <span class='hs-varop'>==</span> <span class='hs-varid'>l</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>BI</span><span class='hs-varop'>.</span><span class='hs-conid'>PS</span> <span class='hs-varid'>x</span> <span class='hs-varid'>s</span> <span class='hs-varid'>l</span><span class='hs-layout'>,</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-varid'>empty</span><span class='hs-layout'>)</span>
<a name="line-193"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>BI</span><span class='hs-varop'>.</span><span class='hs-conid'>PS</span> <span class='hs-varid'>x</span> <span class='hs-varid'>s</span> <span class='hs-varid'>i</span><span class='hs-layout'>,</span> <span class='hs-conid'>BI</span><span class='hs-varop'>.</span><span class='hs-conid'>PS</span> <span class='hs-varid'>x</span> <span class='hs-layout'>(</span><span class='hs-varid'>s</span><span class='hs-varop'>+</span><span class='hs-varid'>i</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>l</span><span class='hs-comment'>-</span><span class='hs-varid'>i</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-194"></a> <span class='hs-layout'>}</span>
<a name="line-195"></a><span class='hs-comment'>{-# INLINE breakSpace #-}</span>
<a name="line-196"></a>
<a name="line-197"></a><span class='hs-comment'>------------------------------------------------------------------------</span>
<a name="line-198"></a>
<a name="line-199"></a><a name="isFunky"></a><span class='hs-comment'>{-# INLINE isFunky #-}</span>
<a name="line-200"></a><span class='hs-definition'>isFunky</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-keyglyph'>-></span> <span class='hs-conid'>Bool</span>
<a name="line-201"></a><span class='hs-definition'>isFunky</span> <span class='hs-varid'>ps</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-conid'>BI</span><span class='hs-varop'>.</span><span class='hs-varid'>toForeignPtr</span> <span class='hs-varid'>ps</span> <span class='hs-keyword'>of</span>
<a name="line-202"></a> <span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-layout'>,</span><span class='hs-varid'>s</span><span class='hs-layout'>,</span><span class='hs-varid'>l</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span>
<a name="line-203"></a> <span class='hs-varid'>unsafePerformIO</span> <span class='hs-varop'>$</span> <span class='hs-varid'>withForeignPtr</span> <span class='hs-varid'>x</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>p</span><span class='hs-keyglyph'>-></span>
<a name="line-204"></a> <span class='hs-layout'>(</span><span class='hs-varop'>/=</span><span class='hs-num'>0</span><span class='hs-layout'>)</span> <span class='hs-varop'>`fmap`</span> <span class='hs-varid'>has_funky_char</span> <span class='hs-layout'>(</span><span class='hs-varid'>p</span> <span class='hs-varop'>`plusPtr`</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>l</span><span class='hs-layout'>)</span>
<a name="line-205"></a>
<a name="line-206"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-keyword'>unsafe</span> <span class='hs-str'>"fpstring.h has_funky_char"</span> <span class='hs-varid'>has_funky_char</span>
<a name="line-207"></a> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>Word8</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>CInt</span>
<a name="line-208"></a>
<a name="line-209"></a><span class='hs-comment'>------------------------------------------------------------------------</span>
<a name="line-210"></a>
<a name="line-211"></a><span class='hs-comment'>-- ByteString rewrites break (=='x') to breakByte 'x'</span>
<a name="line-212"></a><span class='hs-comment'>-- break ((==) x) = breakChar x</span>
<a name="line-213"></a><span class='hs-comment'>-- break (==x) = breakChar x</span>
<a name="line-214"></a><span class='hs-comment'>--</span>
<a name="line-215"></a>
<a name="line-216"></a><span class='hs-comment'>{-
<a name="line-217"></a>{-# INLINE breakOnPS #-}
<a name="line-218"></a>breakOnPS :: Char -> B.ByteString -> (B.ByteString, B.ByteString)
<a name="line-219"></a>breakOnPS c p = case BC.elemIndex c p of
<a name="line-220"></a> Nothing -> (p, BC.empty)
<a name="line-221"></a> Just n -> (B.take n p, B.drop n p)
<a name="line-222"></a>-}</span>
<a name="line-223"></a>
<a name="line-224"></a><a name="hashPS"></a><span class='hs-comment'>{-# INLINE hashPS #-}</span>
<a name="line-225"></a><span class='hs-definition'>hashPS</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-keyglyph'>-></span> <span class='hs-conid'>Int32</span>
<a name="line-226"></a><span class='hs-definition'>hashPS</span> <span class='hs-varid'>ps</span> <span class='hs-keyglyph'>=</span>
<a name="line-227"></a> <span class='hs-keyword'>case</span> <span class='hs-conid'>BI</span><span class='hs-varop'>.</span><span class='hs-varid'>toForeignPtr</span> <span class='hs-varid'>ps</span> <span class='hs-keyword'>of</span>
<a name="line-228"></a> <span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-layout'>,</span><span class='hs-varid'>s</span><span class='hs-layout'>,</span><span class='hs-varid'>l</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span>
<a name="line-229"></a> <span class='hs-varid'>unsafePerformIO</span> <span class='hs-varop'>$</span> <span class='hs-varid'>withForeignPtr</span> <span class='hs-varid'>x</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>p</span><span class='hs-keyglyph'>-></span>
<a name="line-230"></a> <span class='hs-varid'>hash</span> <span class='hs-layout'>(</span><span class='hs-varid'>p</span> <span class='hs-varop'>`plusPtr`</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-varid'>l</span>
<a name="line-231"></a>
<a name="line-232"></a><a name="hash"></a><span class='hs-definition'>hash</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>Word8</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Int32</span>
<a name="line-233"></a><span class='hs-definition'>hash</span> <span class='hs-varid'>ptr</span> <span class='hs-varid'>len</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-num'>0</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int32</span><span class='hs-layout'>)</span> <span class='hs-varid'>ptr</span> <span class='hs-varid'>len</span>
<a name="line-234"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>f</span> <span class='hs-varid'>h</span> <span class='hs-keyword'>_</span> <span class='hs-num'>0</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-varid'>h</span>
<a name="line-235"></a> <span class='hs-varid'>f</span> <span class='hs-varid'>h</span> <span class='hs-varid'>p</span> <span class='hs-varid'>n</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>peek</span> <span class='hs-varid'>p</span>
<a name="line-236"></a> <span class='hs-keyword'>let</span> <span class='hs-varop'>!</span><span class='hs-varid'>h'</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-varop'>+</span> <span class='hs-layout'>(</span><span class='hs-varid'>rotateL</span> <span class='hs-varid'>h</span> <span class='hs-num'>8</span><span class='hs-layout'>)</span>
<a name="line-237"></a> <span class='hs-varid'>f</span> <span class='hs-varid'>h'</span> <span class='hs-layout'>(</span><span class='hs-varid'>p</span> <span class='hs-varop'>`advancePtr`</span> <span class='hs-num'>1</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-num'>1</span><span class='hs-layout'>)</span>
<a name="line-238"></a>
<a name="line-239"></a><a name="substrPS"></a><span class='hs-comment'>{-# INLINE substrPS #-}</span>
<a name="line-240"></a><span class='hs-definition'>substrPS</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-keyglyph'>-></span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-conid'>Int</span>
<a name="line-241"></a><span class='hs-definition'>substrPS</span> <span class='hs-varid'>tok</span> <span class='hs-varid'>str</span>
<a name="line-242"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-varid'>null</span> <span class='hs-varid'>tok</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Just</span> <span class='hs-num'>0</span>
<a name="line-243"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-varid'>length</span> <span class='hs-varid'>tok</span> <span class='hs-varop'>></span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-varid'>length</span> <span class='hs-varid'>str</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Nothing</span>
<a name="line-244"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>n</span> <span class='hs-keyglyph'><-</span> <span class='hs-conid'>BC</span><span class='hs-varop'>.</span><span class='hs-varid'>elemIndex</span> <span class='hs-layout'>(</span><span class='hs-conid'>BC</span><span class='hs-varop'>.</span><span class='hs-varid'>head</span> <span class='hs-varid'>tok</span><span class='hs-layout'>)</span> <span class='hs-varid'>str</span>
<a name="line-245"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>ttok</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-varid'>tail</span> <span class='hs-varid'>tok</span>
<a name="line-246"></a> <span class='hs-varid'>reststr</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-varid'>drop</span> <span class='hs-layout'>(</span><span class='hs-varid'>n</span><span class='hs-varop'>+</span><span class='hs-num'>1</span><span class='hs-layout'>)</span> <span class='hs-varid'>str</span>
<a name="line-247"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>ttok</span> <span class='hs-varop'>==</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-varid'>take</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'>ttok</span><span class='hs-layout'>)</span> <span class='hs-varid'>reststr</span>
<a name="line-248"></a> <span class='hs-keyword'>then</span> <span class='hs-conid'>Just</span> <span class='hs-varid'>n</span>
<a name="line-249"></a> <span class='hs-keyword'>else</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varid'>n</span><span class='hs-varop'>+</span><span class='hs-num'>1</span><span class='hs-layout'>)</span><span class='hs-varop'>+</span><span class='hs-layout'>)</span> <span class='hs-varop'>`fmap`</span> <span class='hs-varid'>substrPS</span> <span class='hs-varid'>tok</span> <span class='hs-varid'>reststr</span>
<a name="line-250"></a>
<a name="line-251"></a><span class='hs-comment'>------------------------------------------------------------------------</span>
<a name="line-252"></a>
<a name="line-253"></a><a name="breakFirstPS"></a><span class='hs-comment'>-- TODO: replace breakFirstPS and breakLastPS with definitions based on</span>
<a name="line-254"></a><span class='hs-comment'>-- ByteString's break/breakEnd</span>
<a name="line-255"></a><span class='hs-comment'>{-# INLINE breakFirstPS #-}</span>
<a name="line-256"></a><span class='hs-definition'>breakFirstPS</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Char</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-keyglyph'>-></span> <span class='hs-conid'>Maybe</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-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span><span class='hs-layout'>)</span>
<a name="line-257"></a><span class='hs-definition'>breakFirstPS</span> <span class='hs-varid'>c</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-conid'>BC</span><span class='hs-varop'>.</span><span class='hs-varid'>elemIndex</span> <span class='hs-varid'>c</span> <span class='hs-varid'>p</span> <span class='hs-keyword'>of</span>
<a name="line-258"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Nothing</span>
<a name="line-259"></a> <span class='hs-conid'>Just</span> <span class='hs-varid'>n</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-varid'>take</span> <span class='hs-varid'>n</span> <span class='hs-varid'>p</span><span class='hs-layout'>,</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-varid'>drop</span> <span class='hs-layout'>(</span><span class='hs-varid'>n</span><span class='hs-varop'>+</span><span class='hs-num'>1</span><span class='hs-layout'>)</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span>
<a name="line-260"></a>
<a name="line-261"></a><a name="breakLastPS"></a><span class='hs-comment'>{-# INLINE breakLastPS #-}</span>
<a name="line-262"></a><span class='hs-definition'>breakLastPS</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Char</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-keyglyph'>-></span> <span class='hs-conid'>Maybe</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-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span><span class='hs-layout'>)</span>
<a name="line-263"></a><span class='hs-definition'>breakLastPS</span> <span class='hs-varid'>c</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-conid'>BC</span><span class='hs-varop'>.</span><span class='hs-varid'>elemIndexEnd</span> <span class='hs-varid'>c</span> <span class='hs-varid'>p</span> <span class='hs-keyword'>of</span>
<a name="line-264"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Nothing</span>
<a name="line-265"></a> <span class='hs-conid'>Just</span> <span class='hs-varid'>n</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-varid'>take</span> <span class='hs-varid'>n</span> <span class='hs-varid'>p</span><span class='hs-layout'>,</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-varid'>drop</span> <span class='hs-layout'>(</span><span class='hs-varid'>n</span><span class='hs-varop'>+</span><span class='hs-num'>1</span><span class='hs-layout'>)</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span>
<a name="line-266"></a>
<a name="line-267"></a><a name="linesPS"></a><span class='hs-comment'>-- TODO: rename</span>
<a name="line-268"></a><span class='hs-comment'>{-# INLINE linesPS #-}</span>
<a name="line-269"></a><span class='hs-definition'>linesPS</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-keyglyph'>-></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-keyglyph'>]</span>
<a name="line-270"></a><span class='hs-definition'>linesPS</span> <span class='hs-varid'>ps</span>
<a name="line-271"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-varid'>null</span> <span class='hs-varid'>ps</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-varid'>empty</span><span class='hs-keyglyph'>]</span>
<a name="line-272"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>BC</span><span class='hs-varop'>.</span><span class='hs-varid'>split</span> <span class='hs-chr'>'\n'</span> <span class='hs-varid'>ps</span>
<a name="line-273"></a>
<a name="line-274"></a><span class='hs-comment'>{- QuickCheck property:
<a name="line-275"></a>
<a name="line-276"></a>import Test.QuickCheck
<a name="line-277"></a>import qualified Data.ByteString.Char8 as BC
<a name="line-278"></a>import Data.Char
<a name="line-279"></a>instance Arbitrary BC.ByteString where
<a name="line-280"></a> arbitrary = fmap BC.pack arbitrary
<a name="line-281"></a>instance Arbitrary Char where
<a name="line-282"></a> arbitrary = chr `fmap` choose (32,127)
<a name="line-283"></a>deepCheck = check (defaultConfig { configMaxTest = 10000})
<a name="line-284"></a>testLines = deepCheck (\x -> (linesPS x == linesPSOld x))
<a name="line-285"></a>linesPSOld ps = case BC.elemIndex '\n' ps of
<a name="line-286"></a> Nothing -> [ps]
<a name="line-287"></a> Just n -> B.take n ps : linesPS (B.drop (n+1) ps) -}</span>
<a name="line-288"></a>
<a name="line-289"></a><a name="unlinesPS"></a><span class='hs-comment'>{-| This function acts exactly like the "Prelude" unlines function, or like
<a name="line-290"></a>"Data.ByteString.Char8" 'unlines', but with one important difference: it will
<a name="line-291"></a>produce a string which may not end with a newline! That is:
<a name="line-292"></a>
<a name="line-293"></a>> unlinesPS ["foo", "bar"]
<a name="line-294"></a>
<a name="line-295"></a>evaluates to \"foo\\nbar\", not \"foo\\nbar\\n\"! This point should hold true for
<a name="line-296"></a>'linesPS' as well.
<a name="line-297"></a>
<a name="line-298"></a>TODO: rename this function. -}</span>
<a name="line-299"></a><span class='hs-definition'>unlinesPS</span> <span class='hs-keyglyph'>::</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-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span>
<a name="line-300"></a><span class='hs-definition'>unlinesPS</span> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>BC</span><span class='hs-varop'>.</span><span class='hs-varid'>empty</span>
<a name="line-301"></a><span class='hs-definition'>unlinesPS</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>BC</span><span class='hs-varop'>.</span><span class='hs-varid'>init</span> <span class='hs-varop'>$</span> <span class='hs-conid'>BC</span><span class='hs-varop'>.</span><span class='hs-varid'>unlines</span> <span class='hs-varid'>x</span>
<a name="line-302"></a><span class='hs-comment'>{-# INLINE unlinesPS #-}</span>
<a name="line-303"></a><span class='hs-comment'>{- QuickCheck property:
<a name="line-304"></a>
<a name="line-305"></a>testUnlines = deepCheck (\x -> (unlinesPS x == unlinesPSOld x))
<a name="line-306"></a>unlinesPSOld ss = BC.concat $ intersperse_newlines ss
<a name="line-307"></a> where intersperse_newlines (a:b:s) = a : newline : intersperse_newlines (b:s)
<a name="line-308"></a> intersperse_newlines s = s
<a name="line-309"></a> newline = BC.pack "\n" -}</span>
<a name="line-310"></a>
<a name="line-311"></a><span class='hs-comment'>-- -----------------------------------------------------------------------------</span>
<a name="line-312"></a><span class='hs-comment'>-- gzReadFilePS</span>
<a name="line-313"></a>
<a name="line-314"></a><a name="gzDecompress"></a><span class='hs-comment'>-- |Decompress the given bytestring into a lazy list of chunks, along with a boolean</span>
<a name="line-315"></a><span class='hs-comment'>-- flag indicating (if True) that the CRC was corrupted.</span>
<a name="line-316"></a><span class='hs-comment'>-- Inspecting the flag will cause the entire list of chunks to be evaluated (but if</span>
<a name="line-317"></a><span class='hs-comment'>-- you throw away the list immediately this should run in constant space).</span>
<a name="line-318"></a><span class='hs-definition'>gzDecompress</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Maybe</span> <span class='hs-conid'>Int</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-layout'>(</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-keyglyph'>]</span><span class='hs-layout'>,</span> <span class='hs-conid'>Bool</span><span class='hs-layout'>)</span>
<a name="line-319"></a><span class='hs-definition'>gzDecompress</span> <span class='hs-varid'>mbufsize</span> <span class='hs-keyglyph'>=</span>
<a name="line-320"></a> <span class='hs-comment'>-- This is what the code would be without the bad CRC recovery logic:</span>
<a name="line-321"></a> <span class='hs-comment'>-- return . BL.toChunks . GZ.decompressWith decompressParams</span>
<a name="line-322"></a> <span class='hs-varid'>toListWarn</span> <span class='hs-varop'>.</span> <span class='hs-conid'>ZI</span><span class='hs-varop'>.</span><span class='hs-varid'>decompressWithErrors</span> <span class='hs-conid'>ZI</span><span class='hs-varop'>.</span><span class='hs-varid'>gzipFormat</span> <span class='hs-varid'>decompressParams</span>
<a name="line-323"></a> <span class='hs-keyword'>where</span>
<a name="line-324"></a> <span class='hs-varid'>decompressParams</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>mbufsize</span> <span class='hs-keyword'>of</span>
<a name="line-325"></a> <span class='hs-conid'>Just</span> <span class='hs-varid'>bufsize</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GZ</span><span class='hs-varop'>.</span><span class='hs-varid'>defaultDecompressParams</span> <span class='hs-layout'>{</span> <span class='hs-conid'>GZ</span><span class='hs-varop'>.</span><span class='hs-varid'>decompressBufferSize</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>bufsize</span> <span class='hs-layout'>}</span>
<a name="line-326"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GZ</span><span class='hs-varop'>.</span><span class='hs-varid'>defaultDecompressParams</span>
<a name="line-327"></a>
<a name="line-328"></a> <span class='hs-varid'>toListWarn</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>ZI</span><span class='hs-varop'>.</span><span class='hs-conid'>DecompressStream</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</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-keyglyph'>]</span><span class='hs-layout'>,</span> <span class='hs-conid'>Bool</span><span class='hs-layout'>)</span>
<a name="line-329"></a> <span class='hs-varid'>toListWarn</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>foldDecompressStream</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-layout'>(</span><span class='hs-varid'>xs</span><span class='hs-layout'>,</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-conop'>:</span><span class='hs-varid'>xs</span><span class='hs-layout'>,</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>[]</span><span class='hs-layout'>,</span> <span class='hs-conid'>False</span><span class='hs-layout'>)</span> <span class='hs-varid'>handleBad</span>
<a name="line-330"></a>
<a name="line-331"></a> <span class='hs-comment'>-- cut and paste from Zlib since it's not currently exported (interface not yet certain)</span>
<a name="line-332"></a> <span class='hs-varid'>foldDecompressStream</span> <span class='hs-keyglyph'>::</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-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span>
<a name="line-333"></a> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>ZI</span><span class='hs-varop'>.</span><span class='hs-conid'>DecompressError</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-334"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>ZI</span><span class='hs-varop'>.</span><span class='hs-conid'>DecompressStream</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span>
<a name="line-335"></a> <span class='hs-varid'>foldDecompressStream</span> <span class='hs-varid'>chunk</span> <span class='hs-varid'>end</span> <span class='hs-varid'>err</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fold</span>
<a name="line-336"></a> <span class='hs-keyword'>where</span>
<a name="line-337"></a> <span class='hs-varid'>fold</span> <span class='hs-conid'>ZI</span><span class='hs-varop'>.</span><span class='hs-conid'>StreamEnd</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>end</span>
<a name="line-338"></a> <span class='hs-varid'>fold</span> <span class='hs-layout'>(</span><span class='hs-conid'>ZI</span><span class='hs-varop'>.</span><span class='hs-conid'>StreamChunk</span> <span class='hs-varid'>bs</span> <span class='hs-varid'>stream</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>chunk</span> <span class='hs-varid'>bs</span> <span class='hs-layout'>(</span><span class='hs-varid'>fold</span> <span class='hs-varid'>stream</span><span class='hs-layout'>)</span>
<a name="line-339"></a> <span class='hs-varid'>fold</span> <span class='hs-layout'>(</span><span class='hs-conid'>ZI</span><span class='hs-varop'>.</span><span class='hs-conid'>StreamError</span> <span class='hs-varid'>code</span> <span class='hs-varid'>msg</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>err</span> <span class='hs-varid'>code</span> <span class='hs-varid'>msg</span>
<a name="line-340"></a>
<a name="line-341"></a> <span class='hs-comment'>-- For a while a bug in darcs caused gzip files with good data but bad CRCs to be</span>
<a name="line-342"></a> <span class='hs-comment'>-- produced. Trap bad CRC messages, run the specified action to report that it happened,</span>
<a name="line-343"></a> <span class='hs-comment'>-- but continue on the assumption that the data is valid.</span>
<a name="line-344"></a> <span class='hs-varid'>handleBad</span> <span class='hs-conid'>ZI</span><span class='hs-varop'>.</span><span class='hs-conid'>DataError</span> <span class='hs-str'>"incorrect data check"</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-conid'>[]</span><span class='hs-layout'>,</span> <span class='hs-conid'>True</span><span class='hs-layout'>)</span>
<a name="line-345"></a> <span class='hs-varid'>handleBad</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>msg</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>error</span> <span class='hs-varid'>msg</span>
<a name="line-346"></a>
<a name="line-347"></a><a name="isGZFile"></a><span class='hs-definition'>isGZFile</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FilePath</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>Maybe</span> <span class='hs-conid'>Int</span><span class='hs-layout'>)</span>
<a name="line-348"></a><span class='hs-definition'>isGZFile</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-349"></a> <span class='hs-varid'>h</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>openBinaryFile</span> <span class='hs-varid'>f</span> <span class='hs-conid'>ReadMode</span>
<a name="line-350"></a> <span class='hs-varid'>header</span> <span class='hs-keyglyph'><-</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-varid'>hGet</span> <span class='hs-varid'>h</span> <span class='hs-num'>2</span>
<a name="line-351"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>header</span> <span class='hs-varop'>/=</span> <span class='hs-conid'>BC</span><span class='hs-varop'>.</span><span class='hs-varid'>pack</span> <span class='hs-str'>"\31\139"</span>
<a name="line-352"></a> <span class='hs-keyword'>then</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>hClose</span> <span class='hs-varid'>h</span>
<a name="line-353"></a> <span class='hs-varid'>return</span> <span class='hs-conid'>Nothing</span>
<a name="line-354"></a> <span class='hs-keyword'>else</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>hSeek</span> <span class='hs-varid'>h</span> <span class='hs-conid'>SeekFromEnd</span> <span class='hs-layout'>(</span><span class='hs-comment'>-</span><span class='hs-num'>4</span><span class='hs-layout'>)</span>
<a name="line-355"></a> <span class='hs-varid'>len</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>hGetLittleEndInt</span> <span class='hs-varid'>h</span>
<a name="line-356"></a> <span class='hs-varid'>hClose</span> <span class='hs-varid'>h</span>
<a name="line-357"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>len</span><span class='hs-layout'>)</span>
<a name="line-358"></a>
<a name="line-359"></a><a name="gzReadFilePS"></a><span class='hs-comment'>-- | Read an entire file, which may or may not be gzip compressed, directly</span>
<a name="line-360"></a><span class='hs-comment'>-- into a 'B.ByteString'.</span>
<a name="line-361"></a><span class='hs-definition'>gzReadFilePS</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FilePath</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-362"></a><span class='hs-definition'>gzReadFilePS</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-363"></a> <span class='hs-varid'>mlen</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>isGZFile</span> <span class='hs-varid'>f</span>
<a name="line-364"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>mlen</span> <span class='hs-keyword'>of</span>
<a name="line-365"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>mmapFilePS</span> <span class='hs-varid'>f</span>
<a name="line-366"></a> <span class='hs-conid'>Just</span> <span class='hs-varid'>len</span> <span class='hs-keyglyph'>-></span>
<a name="line-367"></a> <span class='hs-keyword'>do</span> <span class='hs-comment'>-- Passing the length to gzDecompress means that it produces produces one chunk,</span>
<a name="line-368"></a> <span class='hs-comment'>-- which in turn means that B.concat won't need to copy data.</span>
<a name="line-369"></a> <span class='hs-comment'>-- If the length is wrong this will just affect efficiency, not correctness</span>
<a name="line-370"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>doDecompress</span> <span class='hs-varid'>buf</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>let</span> <span class='hs-layout'>(</span><span class='hs-varid'>res</span><span class='hs-layout'>,</span> <span class='hs-varid'>bad</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>gzDecompress</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>len</span><span class='hs-layout'>)</span> <span class='hs-varid'>buf</span>
<a name="line-371"></a> <span class='hs-keyword'>in</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>when</span> <span class='hs-varid'>bad</span> <span class='hs-varop'>$</span> <span class='hs-varid'>addCRCWarning</span> <span class='hs-varid'>f</span>
<a name="line-372"></a> <span class='hs-varid'>return</span> <span class='hs-varid'>res</span>
<a name="line-373"></a> <span class='hs-varid'>compressed</span> <span class='hs-keyglyph'><-</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-varop'>.</span> <span class='hs-varid'>return</span><span class='hs-layout'>)</span> <span class='hs-varop'>`fmap`</span> <span class='hs-varid'>mmapFilePS</span> <span class='hs-varid'>f</span>
<a name="line-374"></a> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-varid'>concat</span> <span class='hs-varop'>`fmap`</span> <span class='hs-varid'>doDecompress</span> <span class='hs-varid'>compressed</span>
<a name="line-375"></a>
<a name="line-376"></a><a name="hGetLittleEndInt"></a><span class='hs-definition'>hGetLittleEndInt</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Handle</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Int</span>
<a name="line-377"></a><span class='hs-definition'>hGetLittleEndInt</span> <span class='hs-varid'>h</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-378"></a> <span class='hs-varid'>b1</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>ord</span> <span class='hs-varop'>`fmap`</span> <span class='hs-varid'>hGetChar</span> <span class='hs-varid'>h</span>
<a name="line-379"></a> <span class='hs-varid'>b2</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>ord</span> <span class='hs-varop'>`fmap`</span> <span class='hs-varid'>hGetChar</span> <span class='hs-varid'>h</span>
<a name="line-380"></a> <span class='hs-varid'>b3</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>ord</span> <span class='hs-varop'>`fmap`</span> <span class='hs-varid'>hGetChar</span> <span class='hs-varid'>h</span>
<a name="line-381"></a> <span class='hs-varid'>b4</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>ord</span> <span class='hs-varop'>`fmap`</span> <span class='hs-varid'>hGetChar</span> <span class='hs-varid'>h</span>
<a name="line-382"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-varid'>b1</span> <span class='hs-varop'>+</span> <span class='hs-num'>256</span><span class='hs-varop'>*</span><span class='hs-varid'>b2</span> <span class='hs-varop'>+</span> <span class='hs-num'>65536</span><span class='hs-varop'>*</span><span class='hs-varid'>b3</span> <span class='hs-varop'>+</span> <span class='hs-num'>16777216</span><span class='hs-varop'>*</span><span class='hs-varid'>b4</span>
<a name="line-383"></a>
<a name="line-384"></a><a name="gzWriteFilePS"></a><span class='hs-definition'>gzWriteFilePS</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FilePath</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-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-385"></a><span class='hs-definition'>gzWriteFilePS</span> <span class='hs-varid'>f</span> <span class='hs-varid'>ps</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>gzWriteFilePSs</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>ps</span><span class='hs-keyglyph'>]</span>
<a name="line-386"></a>
<a name="line-387"></a><a name="gzWriteFilePSs"></a><span class='hs-definition'>gzWriteFilePSs</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FilePath</span> <span class='hs-keyglyph'>-></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-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-388"></a><span class='hs-definition'>gzWriteFilePSs</span> <span class='hs-varid'>f</span> <span class='hs-varid'>pss</span> <span class='hs-keyglyph'>=</span>
<a name="line-389"></a> <span class='hs-conid'>BL</span><span class='hs-varop'>.</span><span class='hs-varid'>writeFile</span> <span class='hs-varid'>f</span> <span class='hs-varop'>$</span> <span class='hs-conid'>GZ</span><span class='hs-varop'>.</span><span class='hs-varid'>compress</span> <span class='hs-varop'>$</span> <span class='hs-conid'>BL</span><span class='hs-varop'>.</span><span class='hs-varid'>fromChunks</span> <span class='hs-varid'>pss</span>
<a name="line-390"></a>
<a name="line-391"></a><a name="gzReadStdin"></a><span class='hs-comment'>-- | Read standard input, which may or may not be gzip compressed, directly</span>
<a name="line-392"></a><span class='hs-comment'>-- into a 'B.ByteString'.</span>
<a name="line-393"></a><span class='hs-definition'>gzReadStdin</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-394"></a><span class='hs-definition'>gzReadStdin</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>header</span> <span class='hs-keyglyph'><-</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-varid'>hGet</span> <span class='hs-varid'>stdin</span> <span class='hs-num'>2</span>
<a name="line-395"></a> <span class='hs-varid'>rest</span> <span class='hs-keyglyph'><-</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-varid'>hGetContents</span> <span class='hs-varid'>stdin</span>
<a name="line-396"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>allStdin</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-keyglyph'>[</span><span class='hs-varid'>header</span><span class='hs-layout'>,</span><span class='hs-varid'>rest</span><span class='hs-keyglyph'>]</span>
<a name="line-397"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span>
<a name="line-398"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>header</span> <span class='hs-varop'>/=</span> <span class='hs-conid'>BC</span><span class='hs-varop'>.</span><span class='hs-varid'>pack</span> <span class='hs-str'>"\31\139"</span>
<a name="line-399"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>allStdin</span>
<a name="line-400"></a> <span class='hs-keyword'>else</span> <span class='hs-keyword'>let</span> <span class='hs-varid'>decompress</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fst</span> <span class='hs-varop'>.</span> <span class='hs-varid'>gzDecompress</span> <span class='hs-conid'>Nothing</span>
<a name="line-401"></a> <span class='hs-varid'>compressed</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>BL</span><span class='hs-varop'>.</span><span class='hs-varid'>fromChunks</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>allStdin</span><span class='hs-keyglyph'>]</span>
<a name="line-402"></a> <span class='hs-keyword'>in</span>
<a name="line-403"></a> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-varid'>concat</span> <span class='hs-varop'>$</span> <span class='hs-varid'>decompress</span> <span class='hs-varid'>compressed</span>
<a name="line-404"></a>
<a name="line-405"></a><span class='hs-comment'>-- -----------------------------------------------------------------------------</span>
<a name="line-406"></a><span class='hs-comment'>-- mmapFilePS</span>
<a name="line-407"></a>
<a name="line-408"></a><span class='hs-comment'>-- | Like readFilePS, this reads an entire file directly into a</span>
<a name="line-409"></a><span class='hs-comment'>-- 'B.ByteString', but it is even more efficient. It involves directly</span>
<a name="line-410"></a><span class='hs-comment'>-- mapping the file to memory. This has the advantage that the contents of</span>
<a name="line-411"></a><span class='hs-comment'>-- the file never need to be copied. Also, under memory pressure the page</span>
<a name="line-412"></a><span class='hs-comment'>-- may simply be discarded, wile in the case of readFilePS it would need to</span>
<a name="line-413"></a><span class='hs-comment'>-- be written to swap. If you read many small files, mmapFilePS will be</span>
<a name="line-414"></a><span class='hs-comment'>-- less memory-efficient than readFilePS, since each mmapFilePS takes up a</span>
<a name="line-415"></a><span class='hs-comment'>-- separate page of memory. Also, you can run into bus errors if the file</span>
<a name="line-416"></a><span class='hs-comment'>-- is modified. NOTE: as with 'readFilePS', the string representation in</span>
<a name="line-417"></a><span class='hs-comment'>-- the file is assumed to be ISO-8859-1.</span>
<a name="line-418"></a>
<a name="line-419"></a><a name="mmapFilePS"></a><span class='hs-definition'>mmapFilePS</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FilePath</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-420"></a><span class='hs-cpp'>#ifdef HAVE_MMAP</span>
<a name="line-421"></a><span class='hs-definition'>mmapFilePS</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-422"></a> <span class='hs-varid'>x</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>mmapFileByteString</span> <span class='hs-varid'>f</span> <span class='hs-conid'>Nothing</span>
<a name="line-423"></a> <span class='hs-varop'>`catch`</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-layout'>(</span><span class='hs-keyword'>_</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>SomeException</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-424"></a> <span class='hs-varid'>size</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>fileSize</span> <span class='hs-varop'>`fmap`</span> <span class='hs-varid'>getSymbolicLinkStatus</span> <span class='hs-varid'>f</span>
<a name="line-425"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>size</span> <span class='hs-varop'>==</span> <span class='hs-num'>0</span>
<a name="line-426"></a> <span class='hs-keyword'>then</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-427"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>performGC</span> <span class='hs-varop'>>></span> <span class='hs-varid'>mmapFileByteString</span> <span class='hs-varid'>f</span> <span class='hs-conid'>Nothing</span><span class='hs-layout'>)</span>
<a name="line-428"></a> <span class='hs-varid'>return</span> <span class='hs-varid'>x</span>
<a name="line-429"></a><span class='hs-cpp'>#else</span>
<a name="line-430"></a><span class='hs-definition'>mmapFilePS</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-varid'>readFile</span>
<a name="line-431"></a><span class='hs-cpp'>#endif</span>
<a name="line-432"></a>
<a name="line-433"></a><span class='hs-comment'>-- -------------------------------------------------------------------------</span>
<a name="line-434"></a><span class='hs-comment'>-- fromPS2Hex</span>
<a name="line-435"></a>
<a name="line-436"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-keyword'>unsafe</span> <span class='hs-str'>"static fpstring.h conv_to_hex"</span> <span class='hs-varid'>conv_to_hex</span>
<a name="line-437"></a> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>Word8</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>Word8</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-438"></a>
<a name="line-439"></a><a name="fromPS2Hex"></a><span class='hs-definition'>fromPS2Hex</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-keyglyph'>-></span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span>
<a name="line-440"></a><span class='hs-definition'>fromPS2Hex</span> <span class='hs-varid'>ps</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-conid'>BI</span><span class='hs-varop'>.</span><span class='hs-varid'>toForeignPtr</span> <span class='hs-varid'>ps</span> <span class='hs-keyword'>of</span>
<a name="line-441"></a> <span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-layout'>,</span><span class='hs-varid'>s</span><span class='hs-layout'>,</span><span class='hs-varid'>l</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span>
<a name="line-442"></a> <span class='hs-conid'>BI</span><span class='hs-varop'>.</span><span class='hs-varid'>unsafeCreate</span> <span class='hs-layout'>(</span><span class='hs-num'>2</span><span class='hs-varop'>*</span><span class='hs-varid'>l</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>p</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>withForeignPtr</span> <span class='hs-varid'>x</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>f</span> <span class='hs-keyglyph'>-></span>
<a name="line-443"></a> <span class='hs-varid'>conv_to_hex</span> <span class='hs-varid'>p</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varop'>`plusPtr`</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>l</span>
<a name="line-444"></a>
<a name="line-445"></a><span class='hs-comment'>-- -------------------------------------------------------------------------</span>
<a name="line-446"></a><span class='hs-comment'>-- fromHex2PS</span>
<a name="line-447"></a>
<a name="line-448"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-keyword'>unsafe</span> <span class='hs-str'>"static fpstring.h conv_from_hex"</span> <span class='hs-varid'>conv_from_hex</span>
<a name="line-449"></a> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>Word8</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>Word8</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-450"></a>
<a name="line-451"></a><a name="fromHex2PS"></a><span class='hs-definition'>fromHex2PS</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-keyglyph'>-></span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span>
<a name="line-452"></a><span class='hs-definition'>fromHex2PS</span> <span class='hs-varid'>ps</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-conid'>BI</span><span class='hs-varop'>.</span><span class='hs-varid'>toForeignPtr</span> <span class='hs-varid'>ps</span> <span class='hs-keyword'>of</span>
<a name="line-453"></a> <span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-layout'>,</span><span class='hs-varid'>s</span><span class='hs-layout'>,</span><span class='hs-varid'>l</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span>
<a name="line-454"></a> <span class='hs-conid'>BI</span><span class='hs-varop'>.</span><span class='hs-varid'>unsafeCreate</span> <span class='hs-layout'>(</span><span class='hs-varid'>l</span> <span class='hs-varop'>`div`</span> <span class='hs-num'>2</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>p</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>withForeignPtr</span> <span class='hs-varid'>x</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>f</span> <span class='hs-keyglyph'>-></span>
<a name="line-455"></a> <span class='hs-varid'>conv_from_hex</span> <span class='hs-varid'>p</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varop'>`plusPtr`</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-varop'>$</span> <span class='hs-varid'>l</span> <span class='hs-varop'>`div`</span> <span class='hs-num'>2</span><span class='hs-layout'>)</span>
<a name="line-456"></a>
<a name="line-457"></a><span class='hs-comment'>-- -------------------------------------------------------------------------</span>
<a name="line-458"></a><span class='hs-comment'>-- betweenLinesPS</span>
<a name="line-459"></a>
<a name="line-460"></a><span class='hs-comment'>-- | betweenLinesPS returns the B.ByteString between the two lines given,</span>
<a name="line-461"></a><span class='hs-comment'>-- or Nothing if they do not appear.</span>
<a name="line-462"></a>
<a name="line-463"></a><a name="betweenLinesPS"></a><span class='hs-definition'>betweenLinesPS</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-keyglyph'>-></span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span>
<a name="line-464"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</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>
<a name="line-465"></a><span class='hs-definition'>betweenLinesPS</span> <span class='hs-varid'>start</span> <span class='hs-varid'>end</span> <span class='hs-varid'>ps</span>
<a name="line-466"></a> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>break</span> <span class='hs-layout'>(</span><span class='hs-varid'>start</span> <span class='hs-varop'>==</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>linesPS</span> <span class='hs-varid'>ps</span><span class='hs-layout'>)</span> <span class='hs-keyword'>of</span>
<a name="line-467"></a> <span class='hs-layout'>(</span><span class='hs-keyword'>_</span><span class='hs-layout'>,</span> <span class='hs-keyword'>_</span><span class='hs-conop'>:</span><span class='hs-varid'>rest</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-varid'>bs1</span><span class='hs-conop'>:</span><span class='hs-keyword'>_</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span>
<a name="line-468"></a> <span class='hs-keyword'>case</span> <span class='hs-conid'>BI</span><span class='hs-varop'>.</span><span class='hs-varid'>toForeignPtr</span> <span class='hs-varid'>bs1</span> <span class='hs-keyword'>of</span>
<a name="line-469"></a> <span class='hs-layout'>(</span><span class='hs-varid'>ps1</span><span class='hs-layout'>,</span><span class='hs-varid'>s1</span><span class='hs-layout'>,</span><span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span>
<a name="line-470"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>break</span> <span class='hs-layout'>(</span><span class='hs-varid'>end</span> <span class='hs-varop'>==</span><span class='hs-layout'>)</span> <span class='hs-varid'>rest</span> <span class='hs-keyword'>of</span>
<a name="line-471"></a> <span class='hs-layout'>(</span><span class='hs-keyword'>_</span><span class='hs-layout'>,</span> <span class='hs-varid'>bs2</span><span class='hs-conop'>:</span><span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>case</span> <span class='hs-conid'>BI</span><span class='hs-varop'>.</span><span class='hs-varid'>toForeignPtr</span> <span class='hs-varid'>bs2</span> <span class='hs-keyword'>of</span> <span class='hs-layout'>(</span><span class='hs-keyword'>_</span><span class='hs-layout'>,</span><span class='hs-varid'>s2</span><span class='hs-layout'>,</span><span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-varid'>fromForeignPtr</span> <span class='hs-varid'>ps1</span> <span class='hs-varid'>s1</span> <span class='hs-layout'>(</span><span class='hs-varid'>s2</span> <span class='hs-comment'>-</span> <span class='hs-varid'>s1</span><span class='hs-layout'>)</span>
<a name="line-472"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Nothing</span>
<a name="line-473"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Nothing</span>
<a name="line-474"></a>
<a name="line-475"></a><span class='hs-comment'>-- -------------------------------------------------------------------------</span>
<a name="line-476"></a><span class='hs-comment'>-- breakAfterNthNewline</span>
<a name="line-477"></a>
<a name="line-478"></a><a name="breakAfterNthNewline"></a><span class='hs-definition'>breakAfterNthNewline</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span>
<a name="line-479"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</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-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span><span class='hs-layout'>)</span>
<a name="line-480"></a><span class='hs-definition'>breakAfterNthNewline</span> <span class='hs-num'>0</span> <span class='hs-varid'>the_ps</span> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-varid'>null</span> <span class='hs-varid'>the_ps</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-varid'>empty</span><span class='hs-layout'>,</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-varid'>empty</span><span class='hs-layout'>)</span>
<a name="line-481"></a><span class='hs-definition'>breakAfterNthNewline</span> <span class='hs-varid'>n</span> <span class='hs-varid'>the_ps</span> <span class='hs-keyglyph'>=</span>
<a name="line-482"></a> <span class='hs-keyword'>case</span> <span class='hs-conid'>BI</span><span class='hs-varop'>.</span><span class='hs-varid'>toForeignPtr</span> <span class='hs-varid'>the_ps</span> <span class='hs-keyword'>of</span>
<a name="line-483"></a> <span class='hs-layout'>(</span><span class='hs-varid'>fp</span><span class='hs-layout'>,</span><span class='hs-varid'>the_s</span><span class='hs-layout'>,</span><span class='hs-varid'>l</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span>
<a name="line-484"></a> <span class='hs-varid'>unsafePerformIO</span> <span class='hs-varop'>$</span> <span class='hs-varid'>withForeignPtr</span> <span class='hs-varid'>fp</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>p</span> <span class='hs-keyglyph'>-></span>
<a name="line-485"></a> <span class='hs-keyword'>do</span> <span class='hs-keyword'>let</span> <span class='hs-varid'>findit</span> <span class='hs-num'>0</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>s</span> <span class='hs-varop'>==</span> <span class='hs-varid'>end</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-varid'>the_ps</span><span class='hs-layout'>,</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-varid'>empty</span><span class='hs-layout'>)</span>
<a name="line-486"></a> <span class='hs-varid'>findit</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>s</span> <span class='hs-varop'>==</span> <span class='hs-varid'>end</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-conid'>Nothing</span>
<a name="line-487"></a> <span class='hs-varid'>findit</span> <span class='hs-num'>0</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>let</span> <span class='hs-varid'>left_l</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>s</span> <span class='hs-comment'>-</span> <span class='hs-varid'>the_s</span>
<a name="line-488"></a> <span class='hs-keyword'>in</span> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromForeignPtr</span> <span class='hs-varid'>fp</span> <span class='hs-varid'>the_s</span> <span class='hs-varid'>left_l</span><span class='hs-layout'>,</span>
<a name="line-489"></a> <span class='hs-varid'>fromForeignPtr</span> <span class='hs-varid'>fp</span> <span class='hs-varid'>s</span> <span class='hs-layout'>(</span><span class='hs-varid'>l</span> <span class='hs-comment'>-</span> <span class='hs-varid'>left_l</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-490"></a> <span class='hs-varid'>findit</span> <span class='hs-varid'>i</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>w</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>peekElemOff</span> <span class='hs-varid'>p</span> <span class='hs-varid'>s</span>
<a name="line-491"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>w</span> <span class='hs-varop'>==</span> <span class='hs-varid'>nl</span> <span class='hs-keyword'>then</span> <span class='hs-varid'>findit</span> <span class='hs-layout'>(</span><span class='hs-varid'>i</span><span class='hs-comment'>-</span><span class='hs-num'>1</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>s</span><span class='hs-varop'>+</span><span class='hs-num'>1</span><span class='hs-layout'>)</span>
<a name="line-492"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>findit</span> <span class='hs-varid'>i</span> <span class='hs-layout'>(</span><span class='hs-varid'>s</span><span class='hs-varop'>+</span><span class='hs-num'>1</span><span class='hs-layout'>)</span>
<a name="line-493"></a> <span class='hs-varid'>nl</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>BI</span><span class='hs-varop'>.</span><span class='hs-varid'>c2w</span> <span class='hs-chr'>'\n'</span>
<a name="line-494"></a> <span class='hs-varid'>end</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>the_s</span> <span class='hs-varop'>+</span> <span class='hs-varid'>l</span>
<a name="line-495"></a> <span class='hs-varid'>findit</span> <span class='hs-varid'>n</span> <span class='hs-varid'>the_s</span>
<a name="line-496"></a>
<a name="line-497"></a><span class='hs-comment'>-- -------------------------------------------------------------------------</span>
<a name="line-498"></a><span class='hs-comment'>-- breakBeforeNthNewline</span>
<a name="line-499"></a>
<a name="line-500"></a><a name="breakBeforeNthNewline"></a><span class='hs-definition'>breakBeforeNthNewline</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int</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-keyglyph'>-></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-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span><span class='hs-layout'>)</span>
<a name="line-501"></a><span class='hs-definition'>breakBeforeNthNewline</span> <span class='hs-num'>0</span> <span class='hs-varid'>the_ps</span>
<a name="line-502"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-varid'>null</span> <span class='hs-varid'>the_ps</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-varid'>empty</span><span class='hs-layout'>,</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-varid'>empty</span><span class='hs-layout'>)</span>
<a name="line-503"></a><span class='hs-definition'>breakBeforeNthNewline</span> <span class='hs-varid'>n</span> <span class='hs-varid'>the_ps</span> <span class='hs-keyglyph'>=</span>
<a name="line-504"></a> <span class='hs-keyword'>case</span> <span class='hs-conid'>BI</span><span class='hs-varop'>.</span><span class='hs-varid'>toForeignPtr</span> <span class='hs-varid'>the_ps</span> <span class='hs-keyword'>of</span>
<a name="line-505"></a> <span class='hs-layout'>(</span><span class='hs-varid'>fp</span><span class='hs-layout'>,</span><span class='hs-varid'>the_s</span><span class='hs-layout'>,</span><span class='hs-varid'>l</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span>
<a name="line-506"></a> <span class='hs-varid'>unsafePerformIO</span> <span class='hs-varop'>$</span> <span class='hs-varid'>withForeignPtr</span> <span class='hs-varid'>fp</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>p</span> <span class='hs-keyglyph'>-></span>
<a name="line-507"></a> <span class='hs-keyword'>do</span> <span class='hs-keyword'>let</span> <span class='hs-varid'>findit</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>s</span> <span class='hs-varop'>==</span> <span class='hs-varid'>end</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>the_ps</span><span class='hs-layout'>,</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-varid'>empty</span><span class='hs-layout'>)</span>
<a name="line-508"></a> <span class='hs-varid'>findit</span> <span class='hs-varid'>i</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>w</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>peekElemOff</span> <span class='hs-varid'>p</span> <span class='hs-varid'>s</span>
<a name="line-509"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>w</span> <span class='hs-varop'>==</span> <span class='hs-varid'>nl</span>
<a name="line-510"></a> <span class='hs-keyword'>then</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>i</span> <span class='hs-varop'>==</span> <span class='hs-num'>0</span>
<a name="line-511"></a> <span class='hs-keyword'>then</span> <span class='hs-keyword'>let</span> <span class='hs-varid'>left_l</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>s</span> <span class='hs-comment'>-</span> <span class='hs-varid'>the_s</span>
<a name="line-512"></a> <span class='hs-keyword'>in</span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromForeignPtr</span> <span class='hs-varid'>fp</span> <span class='hs-varid'>the_s</span> <span class='hs-varid'>left_l</span><span class='hs-layout'>,</span>
<a name="line-513"></a> <span class='hs-varid'>fromForeignPtr</span> <span class='hs-varid'>fp</span> <span class='hs-varid'>s</span> <span class='hs-layout'>(</span><span class='hs-varid'>l</span> <span class='hs-comment'>-</span> <span class='hs-varid'>left_l</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-514"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>findit</span> <span class='hs-layout'>(</span><span class='hs-varid'>i</span><span class='hs-comment'>-</span><span class='hs-num'>1</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>s</span><span class='hs-varop'>+</span><span class='hs-num'>1</span><span class='hs-layout'>)</span>
<a name="line-515"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>findit</span> <span class='hs-varid'>i</span> <span class='hs-layout'>(</span><span class='hs-varid'>s</span><span class='hs-varop'>+</span><span class='hs-num'>1</span><span class='hs-layout'>)</span>
<a name="line-516"></a> <span class='hs-varid'>nl</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>BI</span><span class='hs-varop'>.</span><span class='hs-varid'>c2w</span> <span class='hs-chr'>'\n'</span>
<a name="line-517"></a> <span class='hs-varid'>end</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>the_s</span> <span class='hs-varop'>+</span> <span class='hs-varid'>l</span>
<a name="line-518"></a> <span class='hs-varid'>findit</span> <span class='hs-varid'>n</span> <span class='hs-varid'>the_s</span>
<a name="line-519"></a>
<a name="line-520"></a><a name="unsafeRunInput"></a><span class='hs-comment'>-- we use a custom Behavior because otherwise on Windows haskeline tries to</span>
<a name="line-521"></a><span class='hs-comment'>-- do hGetEcho on stdin which fails if stdin is e.g. /dev/null</span>
<a name="line-522"></a><span class='hs-definition'>unsafeRunInput</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>InputT</span> <span class='hs-conid'>IO</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span>
<a name="line-523"></a><span class='hs-definition'>unsafeRunInput</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>unsafePerformIO</span> <span class='hs-varop'>.</span> <span class='hs-varid'>runInputTBehavior</span> <span class='hs-layout'>(</span><span class='hs-varid'>useFileHandle</span> <span class='hs-varid'>stdin</span><span class='hs-layout'>)</span> <span class='hs-varid'>defaultSettings</span>
<a name="line-524"></a>
<a name="line-525"></a><a name="isAscii"></a><span class='hs-comment'>-- | Test if a ByteString is made of ascii characters</span>
<a name="line-526"></a><span class='hs-definition'>isAscii</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-keyglyph'>-></span> <span class='hs-conid'>Bool</span>
<a name="line-527"></a><span class='hs-definition'>isAscii</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-varid'>all</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>w</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>w</span> <span class='hs-varop'><</span> <span class='hs-num'>128</span><span class='hs-layout'>)</span>
<a name="line-528"></a>
<a name="line-529"></a><a name="decodeLocale"></a><span class='hs-comment'>-- | Decode a ByteString to a String according to the current locale</span>
<a name="line-530"></a><span class='hs-comment'>-- unsafePerformIO in the locale function is ratified by the fact that GHC 6.12</span>
<a name="line-531"></a><span class='hs-comment'>-- and above also supply locale conversion with functions with a pure type.</span>
<a name="line-532"></a><span class='hs-comment'>-- Unrecognized byte sequences in the input are skipped.</span>
<a name="line-533"></a><span class='hs-definition'>decodeLocale</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-keyglyph'>-></span> <span class='hs-conid'>String</span>
<a name="line-534"></a><span class='hs-definition'>decodeLocale</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>unsafeRunInput</span> <span class='hs-varop'>.</span> <span class='hs-varid'>decode</span>
<a name="line-535"></a>
<a name="line-536"></a><a name="encodeLatin1"></a><span class='hs-comment'>-- | Encode a String to a ByteString with latin1 (i.e., the values of the</span>
<a name="line-537"></a><span class='hs-comment'>-- characters become the values of the bytes; if a character value is greater</span>
<a name="line-538"></a><span class='hs-comment'>-- than 255, its byte becomes the character value modulo 256)</span>
<a name="line-539"></a><span class='hs-definition'>encodeLatin1</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span>
<a name="line-540"></a><span class='hs-definition'>encodeLatin1</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-varop'>.</span> <span class='hs-layout'>(</span><span class='hs-varid'>map</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-varop'>.</span> <span class='hs-varid'>ord</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-541"></a>
<a name="line-542"></a><a name="encodeLocale"></a><span class='hs-comment'>-- | Encode a String to a ByteString according to the current locale</span>
<a name="line-543"></a><span class='hs-definition'>encodeLocale</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span>
<a name="line-544"></a><span class='hs-definition'>encodeLocale</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>unsafeRunInput</span> <span class='hs-varop'>.</span> <span class='hs-varid'>encode</span>
<a name="line-545"></a>
<a name="line-546"></a><a name="decodeString"></a><span class='hs-comment'>-- | Take a @String@ that represents byte values and re-decode it acording to</span>
<a name="line-547"></a><span class='hs-comment'>-- the current locale.</span>
<a name="line-548"></a><span class='hs-definition'>decodeString</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span>
<a name="line-549"></a><span class='hs-definition'>decodeString</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>decodeLocale</span> <span class='hs-varop'>.</span> <span class='hs-varid'>encodeLatin1</span>
<a name="line-550"></a>
<a name="line-551"></a>
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