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<title>Codec/Zlib/Lowlevel.hs</title>
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<pre><a name="line-1"></a><span class='hs-comment'>{-# LANGUAGE ForeignFunctionInterface #-}</span>
<a name="line-2"></a><span class='hs-comment'>{-# LANGUAGE EmptyDataDecls #-}</span>
<a name="line-3"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>Codec</span><span class='hs-varop'>.</span><span class='hs-conid'>Zlib</span><span class='hs-varop'>.</span><span class='hs-conid'>Lowlevel</span>
<a name="line-4"></a>    <span class='hs-layout'>(</span> <span class='hs-conid'>ZStreamStruct</span>
<a name="line-5"></a>    <span class='hs-layout'>,</span> <span class='hs-conid'>ZStream'</span>
<a name="line-6"></a>    <span class='hs-layout'>,</span> <span class='hs-varid'>zstreamNew</span>
<a name="line-7"></a>    <span class='hs-layout'>,</span> <span class='hs-conid'>Strategy</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span>
<a name="line-8"></a>    <span class='hs-layout'>,</span> <span class='hs-varid'>deflateInit2</span>
<a name="line-9"></a>    <span class='hs-layout'>,</span> <span class='hs-varid'>inflateInit2</span>
<a name="line-10"></a>    <span class='hs-layout'>,</span> <span class='hs-varid'>c_free_z_stream_inflate</span>
<a name="line-11"></a>    <span class='hs-layout'>,</span> <span class='hs-varid'>c_free_z_stream_deflate</span>
<a name="line-12"></a>    <span class='hs-layout'>,</span> <span class='hs-varid'>c_set_avail_in</span>
<a name="line-13"></a>    <span class='hs-layout'>,</span> <span class='hs-varid'>c_set_avail_out</span>
<a name="line-14"></a>    <span class='hs-layout'>,</span> <span class='hs-varid'>c_get_avail_out</span>
<a name="line-15"></a>    <span class='hs-layout'>,</span> <span class='hs-varid'>c_get_avail_in</span>
<a name="line-16"></a>    <span class='hs-layout'>,</span> <span class='hs-varid'>c_get_next_in</span>
<a name="line-17"></a>    <span class='hs-layout'>,</span> <span class='hs-varid'>c_call_inflate_noflush</span>
<a name="line-18"></a>    <span class='hs-layout'>,</span> <span class='hs-varid'>c_call_deflate_noflush</span>
<a name="line-19"></a>    <span class='hs-layout'>,</span> <span class='hs-varid'>c_call_deflate_finish</span>
<a name="line-20"></a>    <span class='hs-layout'>,</span> <span class='hs-varid'>c_call_deflate_flush</span>
<a name="line-21"></a>    <span class='hs-layout'>,</span> <span class='hs-varid'>c_call_deflate_set_dictionary</span>
<a name="line-22"></a>    <span class='hs-layout'>,</span> <span class='hs-varid'>c_call_inflate_set_dictionary</span>
<a name="line-23"></a>    <span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-24"></a>
<a name="line-25"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Foreign</span><span class='hs-varop'>.</span><span class='hs-conid'>C</span>
<a name="line-26"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Foreign</span><span class='hs-varop'>.</span><span class='hs-conid'>Ptr</span>
<a name="line-27"></a><span class='hs-keyword'>import</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-layout'>(</span><span class='hs-conid'>WindowBits</span> <span class='hs-layout'>(</span><span class='hs-conid'>WindowBits</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-28"></a>
<a name="line-29"></a><a name="ZStreamStruct"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>ZStreamStruct</span>
<a name="line-30"></a><a name="ZStream'"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>ZStream'</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>ZStreamStruct</span>
<a name="line-31"></a>
<a name="line-32"></a><a name="Strategy"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>Strategy</span> <span class='hs-keyglyph'>=</span>
<a name="line-33"></a>      <span class='hs-conid'>StrategyDefault</span>
<a name="line-34"></a>    <span class='hs-keyglyph'>|</span> <span class='hs-conid'>StrategyFiltered</span>
<a name="line-35"></a>    <span class='hs-keyglyph'>|</span> <span class='hs-conid'>StrategyHuffman</span>
<a name="line-36"></a>    <span class='hs-keyglyph'>|</span> <span class='hs-conid'>StrategyRLE</span>
<a name="line-37"></a>    <span class='hs-keyglyph'>|</span> <span class='hs-conid'>StrategyFixed</span>
<a name="line-38"></a>    <span class='hs-keyword'>deriving</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><span class='hs-conid'>Ord</span><span class='hs-layout'>,</span><span class='hs-conid'>Enum</span><span class='hs-layout'>)</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-keyword'>unsafe</span> <span class='hs-str'>"create_z_stream"</span>
<a name="line-41"></a>    <span class='hs-varid'>zstreamNew</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>ZStream'</span>
<a name="line-42"></a>
<a name="line-43"></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'>"deflate_init2"</span>
<a name="line-44"></a>    <span class='hs-varid'>c_deflateInit2</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>ZStream'</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span>
<a name="line-45"></a>                   <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-46"></a>
<a name="line-47"></a><a name="deflateInit2"></a><span class='hs-definition'>deflateInit2</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>ZStream'</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>WindowBits</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Strategy</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-48"></a><span class='hs-definition'>deflateInit2</span> <span class='hs-varid'>zstream</span> <span class='hs-varid'>level</span> <span class='hs-varid'>windowBits</span> <span class='hs-varid'>memlevel</span> <span class='hs-varid'>strategy</span> <span class='hs-keyglyph'>=</span>
<a name="line-49"></a>    <span class='hs-varid'>c_deflateInit2</span> <span class='hs-varid'>zstream</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>level</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>wbToInt</span> <span class='hs-varid'>windowBits</span><span class='hs-layout'>)</span>
<a name="line-50"></a>                   <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>memlevel</span><span class='hs-layout'>)</span>
<a name="line-51"></a>                   <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-varop'>$</span> <span class='hs-varid'>fromEnum</span> <span class='hs-varid'>strategy</span><span class='hs-layout'>)</span>
<a name="line-52"></a>
<a name="line-53"></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'>"inflate_init2"</span>
<a name="line-54"></a>    <span class='hs-varid'>c_inflateInit2</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>ZStream'</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-55"></a>
<a name="line-56"></a><a name="inflateInit2"></a><span class='hs-definition'>inflateInit2</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>ZStream'</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>WindowBits</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-57"></a><span class='hs-definition'>inflateInit2</span> <span class='hs-varid'>zstream</span> <span class='hs-varid'>wb</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>c_inflateInit2</span> <span class='hs-varid'>zstream</span> <span class='hs-layout'>(</span><span class='hs-varid'>wbToInt</span> <span class='hs-varid'>wb</span><span class='hs-layout'>)</span>
<a name="line-58"></a>
<a name="line-59"></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'>"&amp;free_z_stream_inflate"</span>
<a name="line-60"></a>    <span class='hs-varid'>c_free_z_stream_inflate</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FunPtr</span> <span class='hs-layout'>(</span><span class='hs-conid'>ZStream'</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span><span class='hs-layout'>)</span>
<a name="line-61"></a>
<a name="line-62"></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'>"&amp;free_z_stream_deflate"</span>
<a name="line-63"></a>    <span class='hs-varid'>c_free_z_stream_deflate</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FunPtr</span> <span class='hs-layout'>(</span><span class='hs-conid'>ZStream'</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span><span class='hs-layout'>)</span>
<a name="line-64"></a>
<a name="line-65"></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'>"set_avail_in"</span>
<a name="line-66"></a>    <span class='hs-varid'>c_set_avail_in</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>ZStream'</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>CChar</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CUInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-67"></a>
<a name="line-68"></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'>"set_avail_out"</span>
<a name="line-69"></a>    <span class='hs-varid'>c_set_avail_out</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>ZStream'</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>CChar</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CUInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-70"></a>
<a name="line-71"></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'>"get_avail_out"</span>
<a name="line-72"></a>    <span class='hs-varid'>c_get_avail_out</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>ZStream'</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>CUInt</span>
<a name="line-73"></a>
<a name="line-74"></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'>"get_avail_in"</span>
<a name="line-75"></a>    <span class='hs-varid'>c_get_avail_in</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>ZStream'</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>CUInt</span>
<a name="line-76"></a>
<a name="line-77"></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'>"get_next_in"</span>
<a name="line-78"></a>    <span class='hs-varid'>c_get_next_in</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>ZStream'</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>CChar</span><span class='hs-layout'>)</span>
<a name="line-79"></a>
<a name="line-80"></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'>"call_inflate_noflush"</span>
<a name="line-81"></a>    <span class='hs-varid'>c_call_inflate_noflush</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>ZStream'</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>CInt</span>
<a name="line-82"></a>
<a name="line-83"></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'>"call_deflate_noflush"</span>
<a name="line-84"></a>    <span class='hs-varid'>c_call_deflate_noflush</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>ZStream'</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>CInt</span>
<a name="line-85"></a>
<a name="line-86"></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'>"call_deflate_finish"</span>
<a name="line-87"></a>    <span class='hs-varid'>c_call_deflate_finish</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>ZStream'</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>CInt</span>
<a name="line-88"></a>
<a name="line-89"></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'>"call_deflate_flush"</span>
<a name="line-90"></a>    <span class='hs-varid'>c_call_deflate_flush</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>ZStream'</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>CInt</span>
<a name="line-91"></a>
<a name="line-92"></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'>"deflate_set_dictionary"</span>
<a name="line-93"></a>    <span class='hs-varid'>c_call_deflate_set_dictionary</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>ZStream'</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>CChar</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CUInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-94"></a>
<a name="line-95"></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'>"inflate_set_dictionary"</span>
<a name="line-96"></a>    <span class='hs-varid'>c_call_inflate_set_dictionary</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>ZStream'</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>CChar</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CUInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-97"></a>
<a name="line-98"></a><a name="wbToInt"></a><span class='hs-definition'>wbToInt</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>WindowBits</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span>
<a name="line-99"></a><span class='hs-definition'>wbToInt</span> <span class='hs-layout'>(</span><span class='hs-conid'>WindowBits</span> <span class='hs-varid'>i</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>i</span>
<a name="line-100"></a><span class='hs-definition'>wbToInt</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-num'>15</span>
<a name="line-101"></a>
</pre></body>
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