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<pre><a name="line-1"></a><span class='hs-comment'>{-# OPTIONS_GHC -XNoImplicitPrelude #-}</span>
<a name="line-2"></a><span class='hs-comment'>-----------------------------------------------------------------------------</span>
<a name="line-3"></a><span class='hs-comment'>-- |</span>
<a name="line-4"></a><span class='hs-comment'>-- Module : Foreign.Marshal.Array</span>
<a name="line-5"></a><span class='hs-comment'>-- Copyright : (c) The FFI task force 2001</span>
<a name="line-6"></a><span class='hs-comment'>-- License : BSD-style (see the file libraries/base/LICENSE)</span>
<a name="line-7"></a><span class='hs-comment'>-- </span>
<a name="line-8"></a><span class='hs-comment'>-- Maintainer : ffi@haskell.org</span>
<a name="line-9"></a><span class='hs-comment'>-- Stability : provisional</span>
<a name="line-10"></a><span class='hs-comment'>-- Portability : portable</span>
<a name="line-11"></a><span class='hs-comment'>--</span>
<a name="line-12"></a><span class='hs-comment'>-- Marshalling support: routines allocating, storing, and retrieving Haskell</span>
<a name="line-13"></a><span class='hs-comment'>-- lists that are represented as arrays in the foreign language</span>
<a name="line-14"></a><span class='hs-comment'>--</span>
<a name="line-15"></a><span class='hs-comment'>-----------------------------------------------------------------------------</span>
<a name="line-16"></a>
<a name="line-17"></a><span class='hs-keyword'>module</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>
<a name="line-18"></a> <span class='hs-comment'>-- * Marshalling arrays</span>
<a name="line-19"></a>
<a name="line-20"></a> <span class='hs-comment'>-- ** Allocation</span>
<a name="line-21"></a> <span class='hs-comment'>--</span>
<a name="line-22"></a> <span class='hs-varid'>mallocArray</span><span class='hs-layout'>,</span> <span class='hs-comment'>-- :: Storable a => Int -> IO (Ptr a)</span>
<a name="line-23"></a> <span class='hs-varid'>mallocArray0</span><span class='hs-layout'>,</span> <span class='hs-comment'>-- :: Storable a => Int -> IO (Ptr a)</span>
<a name="line-24"></a>
<a name="line-25"></a> <span class='hs-varid'>allocaArray</span><span class='hs-layout'>,</span> <span class='hs-comment'>-- :: Storable a => Int -> (Ptr a -> IO b) -> IO b</span>
<a name="line-26"></a> <span class='hs-varid'>allocaArray0</span><span class='hs-layout'>,</span> <span class='hs-comment'>-- :: Storable a => Int -> (Ptr a -> IO b) -> IO b</span>
<a name="line-27"></a>
<a name="line-28"></a> <span class='hs-varid'>reallocArray</span><span class='hs-layout'>,</span> <span class='hs-comment'>-- :: Storable a => Ptr a -> Int -> IO (Ptr a)</span>
<a name="line-29"></a> <span class='hs-varid'>reallocArray0</span><span class='hs-layout'>,</span> <span class='hs-comment'>-- :: Storable a => Ptr a -> Int -> IO (Ptr a)</span>
<a name="line-30"></a>
<a name="line-31"></a> <span class='hs-comment'>-- ** Marshalling</span>
<a name="line-32"></a> <span class='hs-comment'>--</span>
<a name="line-33"></a> <span class='hs-varid'>peekArray</span><span class='hs-layout'>,</span> <span class='hs-comment'>-- :: Storable a => Int -> Ptr a -> IO [a]</span>
<a name="line-34"></a> <span class='hs-varid'>peekArray0</span><span class='hs-layout'>,</span> <span class='hs-comment'>-- :: (Storable a, Eq a) => a -> Ptr a -> IO [a]</span>
<a name="line-35"></a>
<a name="line-36"></a> <span class='hs-varid'>pokeArray</span><span class='hs-layout'>,</span> <span class='hs-comment'>-- :: Storable a => Ptr a -> [a] -> IO ()</span>
<a name="line-37"></a> <span class='hs-varid'>pokeArray0</span><span class='hs-layout'>,</span> <span class='hs-comment'>-- :: Storable a => a -> Ptr a -> [a] -> IO ()</span>
<a name="line-38"></a>
<a name="line-39"></a> <span class='hs-comment'>-- ** Combined allocation and marshalling</span>
<a name="line-40"></a> <span class='hs-comment'>--</span>
<a name="line-41"></a> <span class='hs-varid'>newArray</span><span class='hs-layout'>,</span> <span class='hs-comment'>-- :: Storable a => [a] -> IO (Ptr a)</span>
<a name="line-42"></a> <span class='hs-varid'>newArray0</span><span class='hs-layout'>,</span> <span class='hs-comment'>-- :: Storable a => a -> [a] -> IO (Ptr a)</span>
<a name="line-43"></a>
<a name="line-44"></a> <span class='hs-varid'>withArray</span><span class='hs-layout'>,</span> <span class='hs-comment'>-- :: Storable a => [a] -> (Ptr a -> IO b) -> IO b</span>
<a name="line-45"></a> <span class='hs-varid'>withArray0</span><span class='hs-layout'>,</span> <span class='hs-comment'>-- :: Storable a => a -> [a] -> (Ptr a -> IO b) -> IO b</span>
<a name="line-46"></a>
<a name="line-47"></a> <span class='hs-varid'>withArrayLen</span><span class='hs-layout'>,</span> <span class='hs-comment'>-- :: Storable a => [a] -> (Int -> Ptr a -> IO b) -> IO b</span>
<a name="line-48"></a> <span class='hs-varid'>withArrayLen0</span><span class='hs-layout'>,</span> <span class='hs-comment'>-- :: Storable a => a -> [a] -> (Int -> Ptr a -> IO b) -> IO b</span>
<a name="line-49"></a>
<a name="line-50"></a> <span class='hs-comment'>-- ** Copying</span>
<a name="line-51"></a>
<a name="line-52"></a> <span class='hs-comment'>-- | (argument order: destination, source)</span>
<a name="line-53"></a> <span class='hs-varid'>copyArray</span><span class='hs-layout'>,</span> <span class='hs-comment'>-- :: Storable a => Ptr a -> Ptr a -> Int -> IO ()</span>
<a name="line-54"></a> <span class='hs-varid'>moveArray</span><span class='hs-layout'>,</span> <span class='hs-comment'>-- :: Storable a => Ptr a -> Ptr a -> Int -> IO ()</span>
<a name="line-55"></a>
<a name="line-56"></a> <span class='hs-comment'>-- ** Finding the length</span>
<a name="line-57"></a> <span class='hs-comment'>--</span>
<a name="line-58"></a> <span class='hs-varid'>lengthArray0</span><span class='hs-layout'>,</span> <span class='hs-comment'>-- :: (Storable a, Eq a) => a -> Ptr a -> IO Int</span>
<a name="line-59"></a>
<a name="line-60"></a> <span class='hs-comment'>-- ** Indexing</span>
<a name="line-61"></a> <span class='hs-comment'>--</span>
<a name="line-62"></a> <span class='hs-varid'>advancePtr</span><span class='hs-layout'>,</span> <span class='hs-comment'>-- :: Storable a => Ptr a -> Int -> Ptr a</span>
<a name="line-63"></a><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-64"></a>
<a name="line-65"></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> <span class='hs-varid'>plusPtr</span><span class='hs-layout'>)</span>
<a name="line-66"></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-conid'>Storable</span><span class='hs-layout'>(</span><span class='hs-varid'>alignment</span><span class='hs-layout'>,</span><span class='hs-varid'>sizeOf</span><span class='hs-layout'>,</span><span class='hs-varid'>peekElemOff</span><span class='hs-layout'>,</span><span class='hs-varid'>pokeElemOff</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-67"></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'>allocaBytesAligned</span><span class='hs-layout'>,</span> <span class='hs-varid'>reallocBytes</span><span class='hs-layout'>)</span>
<a name="line-68"></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'>Utils</span> <span class='hs-layout'>(</span><span class='hs-varid'>copyBytes</span><span class='hs-layout'>,</span> <span class='hs-varid'>moveBytes</span><span class='hs-layout'>)</span>
<a name="line-69"></a>
<a name="line-70"></a><span class='hs-cpp'>#ifdef __GLASGOW_HASKELL__</span>
<a name="line-71"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>GHC</span><span class='hs-varop'>.</span><span class='hs-conid'>Num</span>
<a name="line-72"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>GHC</span><span class='hs-varop'>.</span><span class='hs-conid'>List</span>
<a name="line-73"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>GHC</span><span class='hs-varop'>.</span><span class='hs-conid'>Err</span>
<a name="line-74"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>GHC</span><span class='hs-varop'>.</span><span class='hs-conid'>Base</span>
<a name="line-75"></a><span class='hs-cpp'>#else</span>
<a name="line-76"></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'>zipWithM_</span><span class='hs-layout'>)</span>
<a name="line-77"></a><span class='hs-cpp'>#endif</span>
<a name="line-78"></a>
<a name="line-79"></a><span class='hs-comment'>-- allocation</span>
<a name="line-80"></a><span class='hs-comment'>-- ----------</span>
<a name="line-81"></a>
<a name="line-82"></a><a name="mallocArray"></a><span class='hs-comment'>-- |Allocate storage for the given number of elements of a storable type</span>
<a name="line-83"></a><span class='hs-comment'>-- (like 'Foreign.Marshal.Alloc.malloc', but for multiple elements).</span>
<a name="line-84"></a><span class='hs-comment'>--</span>
<a name="line-85"></a><span class='hs-definition'>mallocArray</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Storable</span> <span class='hs-varid'>a</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-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-86"></a><span class='hs-definition'>mallocArray</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>doMalloc</span> <span class='hs-varid'>undefined</span>
<a name="line-87"></a> <span class='hs-keyword'>where</span>
<a name="line-88"></a> <span class='hs-varid'>doMalloc</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Storable</span> <span class='hs-varid'>a'</span> <span class='hs-keyglyph'>=></span> <span class='hs-varid'>a'</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-varid'>a'</span><span class='hs-layout'>)</span>
<a name="line-89"></a> <span class='hs-varid'>doMalloc</span> <span class='hs-varid'>dummy</span> <span class='hs-varid'>size</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>mallocBytes</span> <span class='hs-layout'>(</span><span class='hs-varid'>size</span> <span class='hs-varop'>*</span> <span class='hs-varid'>sizeOf</span> <span class='hs-varid'>dummy</span><span class='hs-layout'>)</span>
<a name="line-90"></a>
<a name="line-91"></a><a name="mallocArray0"></a><span class='hs-comment'>-- |Like 'mallocArray', but add an extra position to hold a special</span>
<a name="line-92"></a><span class='hs-comment'>-- termination element.</span>
<a name="line-93"></a><span class='hs-comment'>--</span>
<a name="line-94"></a><span class='hs-definition'>mallocArray0</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Storable</span> <span class='hs-varid'>a</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-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-95"></a><span class='hs-definition'>mallocArray0</span> <span class='hs-varid'>size</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>mallocArray</span> <span class='hs-layout'>(</span><span class='hs-varid'>size</span> <span class='hs-varop'>+</span> <span class='hs-num'>1</span><span class='hs-layout'>)</span>
<a name="line-96"></a>
<a name="line-97"></a><a name="allocaArray"></a><span class='hs-comment'>-- |Temporarily allocate space for the given number of elements</span>
<a name="line-98"></a><span class='hs-comment'>-- (like 'Foreign.Marshal.Alloc.alloca', but for multiple elements).</span>
<a name="line-99"></a><span class='hs-comment'>--</span>
<a name="line-100"></a><span class='hs-definition'>allocaArray</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Storable</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>b</span>
<a name="line-101"></a><span class='hs-definition'>allocaArray</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>doAlloca</span> <span class='hs-varid'>undefined</span>
<a name="line-102"></a> <span class='hs-keyword'>where</span>
<a name="line-103"></a> <span class='hs-varid'>doAlloca</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Storable</span> <span class='hs-varid'>a'</span> <span class='hs-keyglyph'>=></span> <span class='hs-varid'>a'</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-varid'>a'</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>b'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>b'</span>
<a name="line-104"></a> <span class='hs-varid'>doAlloca</span> <span class='hs-varid'>dummy</span> <span class='hs-varid'>size</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>allocaBytesAligned</span> <span class='hs-layout'>(</span><span class='hs-varid'>size</span> <span class='hs-varop'>*</span> <span class='hs-varid'>sizeOf</span> <span class='hs-varid'>dummy</span><span class='hs-layout'>)</span>
<a name="line-105"></a> <span class='hs-layout'>(</span><span class='hs-varid'>alignment</span> <span class='hs-varid'>dummy</span><span class='hs-layout'>)</span>
<a name="line-106"></a>
<a name="line-107"></a><a name="allocaArray0"></a><span class='hs-comment'>-- |Like 'allocaArray', but add an extra position to hold a special</span>
<a name="line-108"></a><span class='hs-comment'>-- termination element.</span>
<a name="line-109"></a><span class='hs-comment'>--</span>
<a name="line-110"></a><span class='hs-definition'>allocaArray0</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Storable</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>b</span>
<a name="line-111"></a><span class='hs-definition'>allocaArray0</span> <span class='hs-varid'>size</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>allocaArray</span> <span class='hs-layout'>(</span><span class='hs-varid'>size</span> <span class='hs-varop'>+</span> <span class='hs-num'>1</span><span class='hs-layout'>)</span>
<a name="line-112"></a><span class='hs-comment'>{-# INLINE allocaArray0 #-}</span>
<a name="line-113"></a> <span class='hs-comment'>-- needed to get allocaArray to inline into withCString, for unknown</span>
<a name="line-114"></a> <span class='hs-comment'>-- reasons --SDM 23/4/2010, see #4004 for benchmark</span>
<a name="line-115"></a>
<a name="line-116"></a><a name="reallocArray"></a><span class='hs-comment'>-- |Adjust the size of an array</span>
<a name="line-117"></a><span class='hs-comment'>--</span>
<a name="line-118"></a><span class='hs-definition'>reallocArray</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Storable</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Ptr</span> <span class='hs-varid'>a</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-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-119"></a><span class='hs-definition'>reallocArray</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>doRealloc</span> <span class='hs-varid'>undefined</span>
<a name="line-120"></a> <span class='hs-keyword'>where</span>
<a name="line-121"></a> <span class='hs-varid'>doRealloc</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Storable</span> <span class='hs-varid'>a'</span> <span class='hs-keyglyph'>=></span> <span class='hs-varid'>a'</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ptr</span> <span class='hs-varid'>a'</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-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-varid'>a'</span><span class='hs-layout'>)</span>
<a name="line-122"></a> <span class='hs-varid'>doRealloc</span> <span class='hs-varid'>dummy</span> <span class='hs-varid'>ptr</span> <span class='hs-varid'>size</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>reallocBytes</span> <span class='hs-varid'>ptr</span> <span class='hs-layout'>(</span><span class='hs-varid'>size</span> <span class='hs-varop'>*</span> <span class='hs-varid'>sizeOf</span> <span class='hs-varid'>dummy</span><span class='hs-layout'>)</span>
<a name="line-123"></a>
<a name="line-124"></a><a name="reallocArray0"></a><span class='hs-comment'>-- |Adjust the size of an array including an extra position for the end marker.</span>
<a name="line-125"></a><span class='hs-comment'>--</span>
<a name="line-126"></a><span class='hs-definition'>reallocArray0</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Storable</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Ptr</span> <span class='hs-varid'>a</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-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-127"></a><span class='hs-definition'>reallocArray0</span> <span class='hs-varid'>ptr</span> <span class='hs-varid'>size</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>reallocArray</span> <span class='hs-varid'>ptr</span> <span class='hs-layout'>(</span><span class='hs-varid'>size</span> <span class='hs-varop'>+</span> <span class='hs-num'>1</span><span class='hs-layout'>)</span>
<a name="line-128"></a>
<a name="line-129"></a>
<a name="line-130"></a><span class='hs-comment'>-- marshalling</span>
<a name="line-131"></a><span class='hs-comment'>-- -----------</span>
<a name="line-132"></a>
<a name="line-133"></a><a name="peekArray"></a><span class='hs-comment'>-- |Convert an array of given length into a Haskell list. The implementation</span>
<a name="line-134"></a><span class='hs-comment'>-- is tail-recursive and so uses constant stack space.</span>
<a name="line-135"></a><span class='hs-comment'>--</span>
<a name="line-136"></a><span class='hs-definition'>peekArray</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Storable</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ptr</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>a</span><span class='hs-keyglyph'>]</span>
<a name="line-137"></a><span class='hs-definition'>peekArray</span> <span class='hs-varid'>size</span> <span class='hs-varid'>ptr</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>size</span> <span class='hs-varop'><=</span> <span class='hs-num'>0</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-conid'>[]</span>
<a name="line-138"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-varid'>size</span><span class='hs-comment'>-</span><span class='hs-num'>1</span><span class='hs-layout'>)</span> <span class='hs-conid'>[]</span>
<a name="line-139"></a> <span class='hs-keyword'>where</span>
<a name="line-140"></a> <span class='hs-varid'>f</span> <span class='hs-num'>0</span> <span class='hs-varid'>acc</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>peekElemOff</span> <span class='hs-varid'>ptr</span> <span class='hs-num'>0</span><span class='hs-layout'>;</span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>e</span><span class='hs-conop'>:</span><span class='hs-varid'>acc</span><span class='hs-layout'>)</span>
<a name="line-141"></a> <span class='hs-varid'>f</span> <span class='hs-varid'>n</span> <span class='hs-varid'>acc</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>peekElemOff</span> <span class='hs-varid'>ptr</span> <span class='hs-varid'>n</span><span class='hs-layout'>;</span> <span class='hs-varid'>f</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> <span class='hs-layout'>(</span><span class='hs-varid'>e</span><span class='hs-conop'>:</span><span class='hs-varid'>acc</span><span class='hs-layout'>)</span>
<a name="line-142"></a>
<a name="line-143"></a><a name="peekArray0"></a><span class='hs-comment'>-- |Convert an array terminated by the given end marker into a Haskell list</span>
<a name="line-144"></a><span class='hs-comment'>--</span>
<a name="line-145"></a><span class='hs-definition'>peekArray0</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Storable</span> <span class='hs-varid'>a</span><span class='hs-layout'>,</span> <span class='hs-conid'>Eq</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ptr</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>a</span><span class='hs-keyglyph'>]</span>
<a name="line-146"></a><span class='hs-definition'>peekArray0</span> <span class='hs-varid'>marker</span> <span class='hs-varid'>ptr</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-147"></a> <span class='hs-varid'>size</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>lengthArray0</span> <span class='hs-varid'>marker</span> <span class='hs-varid'>ptr</span>
<a name="line-148"></a> <span class='hs-varid'>peekArray</span> <span class='hs-varid'>size</span> <span class='hs-varid'>ptr</span>
<a name="line-149"></a>
<a name="line-150"></a><a name="pokeArray"></a><span class='hs-comment'>-- |Write the list elements consecutive into memory</span>
<a name="line-151"></a><span class='hs-comment'>--</span>
<a name="line-152"></a><span class='hs-definition'>pokeArray</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Storable</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Ptr</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>a</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-153"></a><span class='hs-cpp'>#ifndef __GLASGOW_HASKELL__</span>
<a name="line-154"></a><span class='hs-definition'>pokeArray</span> <span class='hs-varid'>ptr</span> <span class='hs-varid'>vals</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>zipWithM_</span> <span class='hs-layout'>(</span><span class='hs-varid'>pokeElemOff</span> <span class='hs-varid'>ptr</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>[</span><span class='hs-num'>0</span><span class='hs-keyglyph'>..</span><span class='hs-keyglyph'>]</span> <span class='hs-varid'>vals</span>
<a name="line-155"></a><span class='hs-cpp'>#else</span>
<a name="line-156"></a><span class='hs-definition'>pokeArray</span> <span class='hs-varid'>ptr</span> <span class='hs-varid'>vals0</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>go</span> <span class='hs-varid'>vals0</span> <span class='hs-num'>0</span><span class='hs-cpp'>#</span>
<a name="line-157"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>go</span> <span class='hs-conid'>[]</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-conid'>()</span>
<a name="line-158"></a> <span class='hs-varid'>go</span> <span class='hs-layout'>(</span><span class='hs-varid'>val</span><span class='hs-conop'>:</span><span class='hs-varid'>vals</span><span class='hs-layout'>)</span> <span class='hs-varid'>n</span><span class='hs-cpp'>#</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>pokeElemOff</span> <span class='hs-varid'>ptr</span> <span class='hs-layout'>(</span><span class='hs-conid'>I</span><span class='hs-cpp'>#</span> <span class='hs-varid'>n</span><span class='hs-cpp'>#</span><span class='hs-layout'>)</span> <span class='hs-varid'>val</span><span class='hs-layout'>;</span> <span class='hs-varid'>go</span> <span class='hs-varid'>vals</span> <span class='hs-layout'>(</span><span class='hs-varid'>n</span><span class='hs-cpp'>#</span> <span class='hs-varop'>+#</span> <span class='hs-num'>1</span><span class='hs-cpp'>#</span><span class='hs-layout'>)</span>
<a name="line-159"></a><span class='hs-cpp'>#endif</span>
<a name="line-160"></a>
<a name="line-161"></a><a name="pokeArray0"></a><span class='hs-comment'>-- |Write the list elements consecutive into memory and terminate them with the</span>
<a name="line-162"></a><span class='hs-comment'>-- given marker element</span>
<a name="line-163"></a><span class='hs-comment'>--</span>
<a name="line-164"></a><span class='hs-definition'>pokeArray0</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Storable</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ptr</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>a</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-165"></a><span class='hs-cpp'>#ifndef __GLASGOW_HASKELL__</span>
<a name="line-166"></a><span class='hs-definition'>pokeArray0</span> <span class='hs-varid'>marker</span> <span class='hs-varid'>ptr</span> <span class='hs-varid'>vals</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-167"></a> <span class='hs-varid'>pokeArray</span> <span class='hs-varid'>ptr</span> <span class='hs-varid'>vals</span>
<a name="line-168"></a> <span class='hs-varid'>pokeElemOff</span> <span class='hs-varid'>ptr</span> <span class='hs-layout'>(</span><span class='hs-varid'>length</span> <span class='hs-varid'>vals</span><span class='hs-layout'>)</span> <span class='hs-varid'>marker</span>
<a name="line-169"></a><span class='hs-cpp'>#else</span>
<a name="line-170"></a><span class='hs-definition'>pokeArray0</span> <span class='hs-varid'>marker</span> <span class='hs-varid'>ptr</span> <span class='hs-varid'>vals0</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>go</span> <span class='hs-varid'>vals0</span> <span class='hs-num'>0</span><span class='hs-cpp'>#</span>
<a name="line-171"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>go</span> <span class='hs-conid'>[]</span> <span class='hs-varid'>n</span><span class='hs-cpp'>#</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>pokeElemOff</span> <span class='hs-varid'>ptr</span> <span class='hs-layout'>(</span><span class='hs-conid'>I</span><span class='hs-cpp'>#</span> <span class='hs-varid'>n</span><span class='hs-cpp'>#</span><span class='hs-layout'>)</span> <span class='hs-varid'>marker</span>
<a name="line-172"></a> <span class='hs-varid'>go</span> <span class='hs-layout'>(</span><span class='hs-varid'>val</span><span class='hs-conop'>:</span><span class='hs-varid'>vals</span><span class='hs-layout'>)</span> <span class='hs-varid'>n</span><span class='hs-cpp'>#</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>pokeElemOff</span> <span class='hs-varid'>ptr</span> <span class='hs-layout'>(</span><span class='hs-conid'>I</span><span class='hs-cpp'>#</span> <span class='hs-varid'>n</span><span class='hs-cpp'>#</span><span class='hs-layout'>)</span> <span class='hs-varid'>val</span><span class='hs-layout'>;</span> <span class='hs-varid'>go</span> <span class='hs-varid'>vals</span> <span class='hs-layout'>(</span><span class='hs-varid'>n</span><span class='hs-cpp'>#</span> <span class='hs-varop'>+#</span> <span class='hs-num'>1</span><span class='hs-cpp'>#</span><span class='hs-layout'>)</span>
<a name="line-173"></a><span class='hs-cpp'>#endif</span>
<a name="line-174"></a>
<a name="line-175"></a>
<a name="line-176"></a><span class='hs-comment'>-- combined allocation and marshalling</span>
<a name="line-177"></a><span class='hs-comment'>-- -----------------------------------</span>
<a name="line-178"></a>
<a name="line-179"></a><a name="newArray"></a><span class='hs-comment'>-- |Write a list of storable elements into a newly allocated, consecutive</span>
<a name="line-180"></a><span class='hs-comment'>-- sequence of storable values</span>
<a name="line-181"></a><span class='hs-comment'>-- (like 'Foreign.Marshal.Utils.new', but for multiple elements).</span>
<a name="line-182"></a><span class='hs-comment'>--</span>
<a name="line-183"></a><span class='hs-definition'>newArray</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Storable</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>a</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-184"></a><span class='hs-definition'>newArray</span> <span class='hs-varid'>vals</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-185"></a> <span class='hs-varid'>ptr</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>mallocArray</span> <span class='hs-layout'>(</span><span class='hs-varid'>length</span> <span class='hs-varid'>vals</span><span class='hs-layout'>)</span>
<a name="line-186"></a> <span class='hs-varid'>pokeArray</span> <span class='hs-varid'>ptr</span> <span class='hs-varid'>vals</span>
<a name="line-187"></a> <span class='hs-varid'>return</span> <span class='hs-varid'>ptr</span>
<a name="line-188"></a>
<a name="line-189"></a><a name="newArray0"></a><span class='hs-comment'>-- |Write a list of storable elements into a newly allocated, consecutive</span>
<a name="line-190"></a><span class='hs-comment'>-- sequence of storable values, where the end is fixed by the given end marker</span>
<a name="line-191"></a><span class='hs-comment'>--</span>
<a name="line-192"></a><span class='hs-definition'>newArray0</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Storable</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>a</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-193"></a><span class='hs-definition'>newArray0</span> <span class='hs-varid'>marker</span> <span class='hs-varid'>vals</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-194"></a> <span class='hs-varid'>ptr</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>mallocArray0</span> <span class='hs-layout'>(</span><span class='hs-varid'>length</span> <span class='hs-varid'>vals</span><span class='hs-layout'>)</span>
<a name="line-195"></a> <span class='hs-varid'>pokeArray0</span> <span class='hs-varid'>marker</span> <span class='hs-varid'>ptr</span> <span class='hs-varid'>vals</span>
<a name="line-196"></a> <span class='hs-varid'>return</span> <span class='hs-varid'>ptr</span>
<a name="line-197"></a>
<a name="line-198"></a><a name="withArray"></a><span class='hs-comment'>-- |Temporarily store a list of storable values in memory</span>
<a name="line-199"></a><span class='hs-comment'>-- (like 'Foreign.Marshal.Utils.with', but for multiple elements).</span>
<a name="line-200"></a><span class='hs-comment'>--</span>
<a name="line-201"></a><span class='hs-definition'>withArray</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Storable</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>a</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>b</span>
<a name="line-202"></a><span class='hs-definition'>withArray</span> <span class='hs-varid'>vals</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>withArrayLen</span> <span class='hs-varid'>vals</span> <span class='hs-varop'>.</span> <span class='hs-varid'>const</span>
<a name="line-203"></a>
<a name="line-204"></a><a name="withArrayLen"></a><span class='hs-comment'>-- |Like 'withArray', but the action gets the number of values</span>
<a name="line-205"></a><span class='hs-comment'>-- as an additional parameter</span>
<a name="line-206"></a><span class='hs-comment'>--</span>
<a name="line-207"></a><span class='hs-definition'>withArrayLen</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Storable</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>a</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ptr</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>b</span>
<a name="line-208"></a><span class='hs-definition'>withArrayLen</span> <span class='hs-varid'>vals</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span>
<a name="line-209"></a> <span class='hs-varid'>allocaArray</span> <span class='hs-varid'>len</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>ptr</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-210"></a> <span class='hs-varid'>pokeArray</span> <span class='hs-varid'>ptr</span> <span class='hs-varid'>vals</span>
<a name="line-211"></a> <span class='hs-varid'>res</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>f</span> <span class='hs-varid'>len</span> <span class='hs-varid'>ptr</span>
<a name="line-212"></a> <span class='hs-varid'>return</span> <span class='hs-varid'>res</span>
<a name="line-213"></a> <span class='hs-keyword'>where</span>
<a name="line-214"></a> <span class='hs-varid'>len</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>length</span> <span class='hs-varid'>vals</span>
<a name="line-215"></a>
<a name="line-216"></a><a name="withArray0"></a><span class='hs-comment'>-- |Like 'withArray', but a terminator indicates where the array ends</span>
<a name="line-217"></a><span class='hs-comment'>--</span>
<a name="line-218"></a><span class='hs-definition'>withArray0</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Storable</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>a</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>b</span>
<a name="line-219"></a><span class='hs-definition'>withArray0</span> <span class='hs-varid'>marker</span> <span class='hs-varid'>vals</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>withArrayLen0</span> <span class='hs-varid'>marker</span> <span class='hs-varid'>vals</span> <span class='hs-varop'>.</span> <span class='hs-varid'>const</span>
<a name="line-220"></a>
<a name="line-221"></a><a name="withArrayLen0"></a><span class='hs-comment'>-- |Like 'withArrayLen', but a terminator indicates where the array ends</span>
<a name="line-222"></a><span class='hs-comment'>--</span>
<a name="line-223"></a><span class='hs-definition'>withArrayLen0</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Storable</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>a</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ptr</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>b</span>
<a name="line-224"></a><span class='hs-definition'>withArrayLen0</span> <span class='hs-varid'>marker</span> <span class='hs-varid'>vals</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span>
<a name="line-225"></a> <span class='hs-varid'>allocaArray0</span> <span class='hs-varid'>len</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>ptr</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-226"></a> <span class='hs-varid'>pokeArray0</span> <span class='hs-varid'>marker</span> <span class='hs-varid'>ptr</span> <span class='hs-varid'>vals</span>
<a name="line-227"></a> <span class='hs-varid'>res</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>f</span> <span class='hs-varid'>len</span> <span class='hs-varid'>ptr</span>
<a name="line-228"></a> <span class='hs-varid'>return</span> <span class='hs-varid'>res</span>
<a name="line-229"></a> <span class='hs-keyword'>where</span>
<a name="line-230"></a> <span class='hs-varid'>len</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>length</span> <span class='hs-varid'>vals</span>
<a name="line-231"></a>
<a name="line-232"></a>
<a name="line-233"></a><span class='hs-comment'>-- copying (argument order: destination, source)</span>
<a name="line-234"></a><span class='hs-comment'>-- -------</span>
<a name="line-235"></a>
<a name="line-236"></a><a name="copyArray"></a><span class='hs-comment'>-- |Copy the given number of elements from the second array (source) into the</span>
<a name="line-237"></a><span class='hs-comment'>-- first array (destination); the copied areas may /not/ overlap</span>
<a name="line-238"></a><span class='hs-comment'>--</span>
<a name="line-239"></a><span class='hs-definition'>copyArray</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Storable</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Ptr</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ptr</span> <span class='hs-varid'>a</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'>()</span>
<a name="line-240"></a><span class='hs-definition'>copyArray</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>doCopy</span> <span class='hs-varid'>undefined</span>
<a name="line-241"></a> <span class='hs-keyword'>where</span>
<a name="line-242"></a> <span class='hs-varid'>doCopy</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Storable</span> <span class='hs-varid'>a'</span> <span class='hs-keyglyph'>=></span> <span class='hs-varid'>a'</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ptr</span> <span class='hs-varid'>a'</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ptr</span> <span class='hs-varid'>a'</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'>()</span>
<a name="line-243"></a> <span class='hs-varid'>doCopy</span> <span class='hs-varid'>dummy</span> <span class='hs-varid'>dest</span> <span class='hs-varid'>src</span> <span class='hs-varid'>size</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>copyBytes</span> <span class='hs-varid'>dest</span> <span class='hs-varid'>src</span> <span class='hs-layout'>(</span><span class='hs-varid'>size</span> <span class='hs-varop'>*</span> <span class='hs-varid'>sizeOf</span> <span class='hs-varid'>dummy</span><span class='hs-layout'>)</span>
<a name="line-244"></a>
<a name="line-245"></a><a name="moveArray"></a><span class='hs-comment'>-- |Copy the given number of elements from the second array (source) into the</span>
<a name="line-246"></a><span class='hs-comment'>-- first array (destination); the copied areas /may/ overlap</span>
<a name="line-247"></a><span class='hs-comment'>--</span>
<a name="line-248"></a><span class='hs-definition'>moveArray</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Storable</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Ptr</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ptr</span> <span class='hs-varid'>a</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'>()</span>
<a name="line-249"></a><span class='hs-definition'>moveArray</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>doMove</span> <span class='hs-varid'>undefined</span>
<a name="line-250"></a> <span class='hs-keyword'>where</span>
<a name="line-251"></a> <span class='hs-varid'>doMove</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Storable</span> <span class='hs-varid'>a'</span> <span class='hs-keyglyph'>=></span> <span class='hs-varid'>a'</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ptr</span> <span class='hs-varid'>a'</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ptr</span> <span class='hs-varid'>a'</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'>()</span>
<a name="line-252"></a> <span class='hs-varid'>doMove</span> <span class='hs-varid'>dummy</span> <span class='hs-varid'>dest</span> <span class='hs-varid'>src</span> <span class='hs-varid'>size</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>moveBytes</span> <span class='hs-varid'>dest</span> <span class='hs-varid'>src</span> <span class='hs-layout'>(</span><span class='hs-varid'>size</span> <span class='hs-varop'>*</span> <span class='hs-varid'>sizeOf</span> <span class='hs-varid'>dummy</span><span class='hs-layout'>)</span>
<a name="line-253"></a>
<a name="line-254"></a>
<a name="line-255"></a><span class='hs-comment'>-- finding the length</span>
<a name="line-256"></a><span class='hs-comment'>-- ------------------</span>
<a name="line-257"></a>
<a name="line-258"></a><a name="lengthArray0"></a><span class='hs-comment'>-- |Return the number of elements in an array, excluding the terminator</span>
<a name="line-259"></a><span class='hs-comment'>--</span>
<a name="line-260"></a><span class='hs-definition'>lengthArray0</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Storable</span> <span class='hs-varid'>a</span><span class='hs-layout'>,</span> <span class='hs-conid'>Eq</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ptr</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Int</span>
<a name="line-261"></a><span class='hs-definition'>lengthArray0</span> <span class='hs-varid'>marker</span> <span class='hs-varid'>ptr</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>loop</span> <span class='hs-num'>0</span>
<a name="line-262"></a> <span class='hs-keyword'>where</span>
<a name="line-263"></a> <span class='hs-varid'>loop</span> <span class='hs-varid'>i</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-264"></a> <span class='hs-varid'>val</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>peekElemOff</span> <span class='hs-varid'>ptr</span> <span class='hs-varid'>i</span>
<a name="line-265"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>val</span> <span class='hs-varop'>==</span> <span class='hs-varid'>marker</span> <span class='hs-keyword'>then</span> <span class='hs-varid'>return</span> <span class='hs-varid'>i</span> <span class='hs-keyword'>else</span> <span class='hs-varid'>loop</span> <span class='hs-layout'>(</span><span class='hs-varid'>i</span><span class='hs-varop'>+</span><span class='hs-num'>1</span><span class='hs-layout'>)</span>
<a name="line-266"></a>
<a name="line-267"></a>
<a name="line-268"></a><span class='hs-comment'>-- indexing</span>
<a name="line-269"></a><span class='hs-comment'>-- --------</span>
<a name="line-270"></a>
<a name="line-271"></a><a name="advancePtr"></a><span class='hs-comment'>-- |Advance a pointer into an array by the given number of elements</span>
<a name="line-272"></a><span class='hs-comment'>--</span>
<a name="line-273"></a><span class='hs-definition'>advancePtr</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Storable</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Ptr</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ptr</span> <span class='hs-varid'>a</span>
<a name="line-274"></a><span class='hs-definition'>advancePtr</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>doAdvance</span> <span class='hs-varid'>undefined</span>
<a name="line-275"></a> <span class='hs-keyword'>where</span>
<a name="line-276"></a> <span class='hs-varid'>doAdvance</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Storable</span> <span class='hs-varid'>a'</span> <span class='hs-keyglyph'>=></span> <span class='hs-varid'>a'</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ptr</span> <span class='hs-varid'>a'</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ptr</span> <span class='hs-varid'>a'</span>
<a name="line-277"></a> <span class='hs-varid'>doAdvance</span> <span class='hs-varid'>dummy</span> <span class='hs-varid'>ptr</span> <span class='hs-varid'>i</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>ptr</span> <span class='hs-varop'>`plusPtr`</span> <span class='hs-layout'>(</span><span class='hs-varid'>i</span> <span class='hs-varop'>*</span> <span class='hs-varid'>sizeOf</span> <span class='hs-varid'>dummy</span><span class='hs-layout'>)</span>
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