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<pre><a name="line-1"></a><span class='hs-comment'>{-# LINE 1 "System/PosixFile.hsc" #-}</span>
<a name="line-2"></a><span class='hs-comment'>{-# LANGUAGE ForeignFunctionInterface #-}</span>
<a name="line-3"></a><span class='hs-comment'>{-# LINE 2 "System/PosixFile.hsc" #-}</span>
<a name="line-4"></a><span class='hs-comment'>{-# LANGUAGE GeneralizedNewtypeDeriving #-}</span>
<a name="line-5"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>PosixFile</span>
<a name="line-6"></a> <span class='hs-layout'>(</span> <span class='hs-varid'>openRead</span>
<a name="line-7"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>read</span>
<a name="line-8"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>close</span>
<a name="line-9"></a> <span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-10"></a>
<a name="line-11"></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'>String</span> <span class='hs-layout'>(</span><span class='hs-conid'>CString</span><span class='hs-layout'>,</span> <span class='hs-varid'>withCString</span><span class='hs-layout'>)</span>
<a name="line-12"></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'>Alloc</span> <span class='hs-layout'>(</span><span class='hs-varid'>mallocBytes</span><span class='hs-layout'>,</span> <span class='hs-varid'>free</span><span class='hs-layout'>)</span>
<a name="line-13"></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-14"></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'>Error</span> <span class='hs-layout'>(</span><span class='hs-varid'>throwErrno</span><span class='hs-layout'>)</span>
<a name="line-15"></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'>Ptr</span><span class='hs-layout'>)</span>
<a name="line-16"></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-conid'>Bits</span><span class='hs-layout'>)</span>
<a name="line-17"></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-18"></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'>S</span>
<a name="line-19"></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'>Unsafe</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>BU</span>
<a name="line-20"></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'>read</span><span class='hs-layout'>)</span>
<a name="line-21"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Conduit</span><span class='hs-varop'>.</span><span class='hs-conid'>Util</span><span class='hs-varop'>.</span><span class='hs-conid'>Source</span> <span class='hs-layout'>(</span><span class='hs-conid'>SourceIOResult</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-22"></a>
<a name="line-23"></a>
<a name="line-24"></a><span class='hs-comment'>{-# LINE 22 "System/PosixFile.hsc" #-}</span>
<a name="line-25"></a>
<a name="line-26"></a><a name="Flag"></a><span class='hs-keyword'>newtype</span> <span class='hs-conid'>Flag</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Flag</span> <span class='hs-conid'>CInt</span>
<a name="line-27"></a> <span class='hs-keyword'>deriving</span> <span class='hs-layout'>(</span><span class='hs-conid'>Num</span><span class='hs-layout'>,</span> <span class='hs-conid'>Bits</span><span class='hs-layout'>,</span> <span class='hs-conid'>Show</span><span class='hs-layout'>,</span> <span class='hs-conid'>Eq</span><span class='hs-layout'>)</span>
<a name="line-28"></a>
<a name="line-29"></a><a name="oRdonly"></a><span class='hs-definition'>oRdonly</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Flag</span>
<a name="line-30"></a><span class='hs-definition'>oRdonly</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Flag</span> <span class='hs-num'>0</span>
<a name="line-31"></a>
<a name="line-32"></a><span class='hs-comment'>{-# LINE 29 "System/PosixFile.hsc" #-}</span>
<a name="line-33"></a>
<a name="line-34"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-str'>"open"</span>
<a name="line-35"></a> <span class='hs-varid'>c_open</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CString</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Flag</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>CInt</span>
<a name="line-36"></a>
<a name="line-37"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-str'>"read"</span>
<a name="line-38"></a> <span class='hs-varid'>c_read</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FD</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'>CInt</span>
<a name="line-39"></a>
<a name="line-40"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-str'>"close"</span>
<a name="line-41"></a> <span class='hs-varid'>close</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FD</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-42"></a>
<a name="line-43"></a><a name="FD"></a><span class='hs-keyword'>newtype</span> <span class='hs-conid'>FD</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>FD</span> <span class='hs-conid'>CInt</span>
<a name="line-44"></a>
<a name="line-45"></a><a name="openRead"></a><span class='hs-definition'>openRead</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'>FD</span>
<a name="line-46"></a><span class='hs-definition'>openRead</span> <span class='hs-varid'>fp</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-47"></a> <span class='hs-varid'>h</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>withCString</span> <span class='hs-varid'>fp</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>str</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>c_open</span> <span class='hs-varid'>str</span> <span class='hs-varid'>oRdonly</span>
<a name="line-48"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>h</span> <span class='hs-varop'><</span> <span class='hs-num'>0</span>
<a name="line-49"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>throwErrno</span> <span class='hs-varop'>$</span> <span class='hs-str'>"Could not open file: "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>fp</span>
<a name="line-50"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-conid'>FD</span> <span class='hs-varid'>h</span>
<a name="line-51"></a>
<a name="line-52"></a><a name="read"></a><span class='hs-definition'>read</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FD</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>SourceIOResult</span> <span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span><span class='hs-layout'>)</span>
<a name="line-53"></a><span class='hs-definition'>read</span> <span class='hs-varid'>fd</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-54"></a> <span class='hs-varid'>cstr</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>mallocBytes</span> <span class='hs-num'>4096</span>
<a name="line-55"></a> <span class='hs-varid'>len</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>c_read</span> <span class='hs-varid'>fd</span> <span class='hs-varid'>cstr</span> <span class='hs-num'>4096</span>
<a name="line-56"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>len</span> <span class='hs-varop'>==</span> <span class='hs-num'>0</span>
<a name="line-57"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>free</span> <span class='hs-varid'>cstr</span> <span class='hs-varop'>>></span> <span class='hs-varid'>return</span> <span class='hs-conid'>IOClosed</span>
<a name="line-58"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>fmap</span> <span class='hs-conid'>IOOpen</span> <span class='hs-varop'>$</span> <span class='hs-conid'>BU</span><span class='hs-varop'>.</span><span class='hs-varid'>unsafePackCStringFinalizer</span>
<a name="line-59"></a> <span class='hs-varid'>cstr</span>
<a name="line-60"></a> <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>len</span><span class='hs-layout'>)</span>
<a name="line-61"></a> <span class='hs-layout'>(</span><span class='hs-varid'>free</span> <span class='hs-varid'>cstr</span><span class='hs-layout'>)</span>
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