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<pre><a name="line-1"></a><span class='hs-comment'>{-# LINE 1 "Debian/Dpkg/DB.hsc" #-}</span>
<a name="line-2"></a><span class='hs-comment'>{-
<a name="line-3"></a>{-# LINE 2 "Debian/Dpkg/DB.hsc" #-}
<a name="line-4"></a> DB.hsc: Haskell bindings to libdpkg
<a name="line-5"></a> Copyright (C) 2011, 2012 Clint Adams
<a name="line-6"></a>
<a name="line-7"></a> This program is free software; you can redistribute it and/or modify
<a name="line-8"></a> it under the terms of the GNU General Public License as published by
<a name="line-9"></a> the Free Software Foundation; either version 3 of the License, or
<a name="line-10"></a> (at your option) any later version.
<a name="line-11"></a>
<a name="line-12"></a> This program is distributed in the hope that it will be useful,
<a name="line-13"></a> but WITHOUT ANY WARRANTY; without even the implied warranty of
<a name="line-14"></a> MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
<a name="line-15"></a> GNU General Public License for more details.
<a name="line-16"></a>
<a name="line-17"></a> You should have received a copy of the GNU General Public License
<a name="line-18"></a> along with this program; if not, write to the Free Software
<a name="line-19"></a> Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
<a name="line-20"></a>-}</span>
<a name="line-21"></a>
<a name="line-22"></a><span class='hs-comment'>{-# LANGUAGE CPP, ForeignFunctionInterface #-}</span>
<a name="line-23"></a>
<a name="line-24"></a>
<a name="line-25"></a><span class='hs-comment'>{-# LINE 23 "Debian/Dpkg/DB.hsc" #-}</span>
<a name="line-26"></a>
<a name="line-27"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>Debian</span><span class='hs-varop'>.</span><span class='hs-conid'>Dpkg</span><span class='hs-varop'>.</span><span class='hs-conid'>DB</span> <span class='hs-layout'>(</span>
<a name="line-28"></a> <span class='hs-varid'>msdbInit</span>
<a name="line-29"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>setDbDir</span>
<a name="line-30"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>pkgList</span>
<a name="line-31"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>parseVersion</span>
<a name="line-32"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>c'parseversion</span>
<a name="line-33"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>c'dpkg_version_compare</span>
<a name="line-34"></a><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-35"></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-conid'>FunPtr</span><span class='hs-layout'>,</span><span class='hs-varid'>plusPtr</span><span class='hs-layout'>)</span>
<a name="line-36"></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'>wordPtrToPtr</span><span class='hs-layout'>,</span><span class='hs-varid'>castPtrToFunPtr</span><span class='hs-layout'>)</span>
<a name="line-37"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Foreign</span><span class='hs-varop'>.</span><span class='hs-conid'>Storable</span>
<a name="line-38"></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>
<a name="line-39"></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-conid'>CStringLen</span><span class='hs-layout'>,</span><span class='hs-conid'>CWString</span><span class='hs-layout'>,</span><span class='hs-conid'>CWStringLen</span><span class='hs-layout'>)</span>
<a name="line-40"></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'>alloca</span><span class='hs-layout'>)</span>
<a name="line-41"></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'>peekArray</span><span class='hs-layout'>,</span><span class='hs-varid'>pokeArray</span><span class='hs-layout'>)</span>
<a name="line-42"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Int</span>
<a name="line-43"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Word</span>
<a name="line-44"></a>
<a name="line-45"></a><span class='hs-comment'>{-# LINE 33 "Debian/Dpkg/DB.hsc" #-}</span>
<a name="line-46"></a>
<a name="line-47"></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'>nullPtr</span><span class='hs-layout'>)</span>
<a name="line-48"></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-varid'>withCString</span><span class='hs-layout'>,</span> <span class='hs-varid'>peekCString</span><span class='hs-layout'>)</span>
<a name="line-49"></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'>with</span><span class='hs-layout'>)</span>
<a name="line-50"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Monad</span> <span class='hs-layout'>(</span><span class='hs-varid'>liftM</span><span class='hs-layout'>,</span> <span class='hs-varid'>join</span><span class='hs-layout'>)</span>
<a name="line-51"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Monad</span><span class='hs-varop'>.</span><span class='hs-conid'>Loops</span> <span class='hs-layout'>(</span><span class='hs-varid'>unfoldrM</span><span class='hs-layout'>)</span>
<a name="line-52"></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'>BS</span>
<a name="line-53"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Debian</span><span class='hs-varop'>.</span><span class='hs-conid'>Dpkg</span><span class='hs-varop'>.</span><span class='hs-conid'>Types</span>
<a name="line-54"></a>
<a name="line-55"></a>
<a name="line-56"></a><span class='hs-comment'>{-# LINE 43 "Debian/Dpkg/DB.hsc" #-}</span>
<a name="line-57"></a>
<a name="line-58"></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'>"modstatdb_open"</span> <span class='hs-varid'>c'modstatdb_open</span>
<a name="line-59"></a> <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-60"></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'>"&modstatdb_open"</span> <span class='hs-varid'>p'modstatdb_open</span>
<a name="line-61"></a> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FunPtr</span> <span class='hs-layout'>(</span><span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span><span class='hs-layout'>)</span>
<a name="line-62"></a>
<a name="line-63"></a><span class='hs-comment'>{-# LINE 45 "Debian/Dpkg/DB.hsc" #-}</span>
<a name="line-64"></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'>"push_error_context"</span> <span class='hs-varid'>c'push_error_context</span>
<a name="line-65"></a> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-66"></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'>"&push_error_context"</span> <span class='hs-varid'>p'push_error_context</span>
<a name="line-67"></a> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FunPtr</span> <span class='hs-layout'>(</span><span class='hs-conid'>IO</span> <span class='hs-conid'>()</span><span class='hs-layout'>)</span>
<a name="line-68"></a>
<a name="line-69"></a><span class='hs-comment'>{-# LINE 46 "Debian/Dpkg/DB.hsc" #-}</span>
<a name="line-70"></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'>"dpkg_set_progname"</span> <span class='hs-varid'>c'dpkg_set_progname</span>
<a name="line-71"></a> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CString</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-72"></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'>"&dpkg_set_progname"</span> <span class='hs-varid'>p'dpkg_set_progname</span>
<a name="line-73"></a> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FunPtr</span> <span class='hs-layout'>(</span><span class='hs-conid'>CString</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span><span class='hs-layout'>)</span>
<a name="line-74"></a>
<a name="line-75"></a><span class='hs-comment'>{-# LINE 47 "Debian/Dpkg/DB.hsc" #-}</span>
<a name="line-76"></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'>"dpkg_db_set_dir"</span> <span class='hs-varid'>c'dpkg_db_set_dir</span>
<a name="line-77"></a> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CString</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-78"></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'>"&dpkg_db_set_dir"</span> <span class='hs-varid'>p'dpkg_db_set_dir</span>
<a name="line-79"></a> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FunPtr</span> <span class='hs-layout'>(</span><span class='hs-conid'>CString</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span><span class='hs-layout'>)</span>
<a name="line-80"></a>
<a name="line-81"></a><span class='hs-comment'>{-# LINE 48 "Debian/Dpkg/DB.hsc" #-}</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'>"pkg_db_iter_new"</span> <span class='hs-varid'>c'pkg_db_iter_new</span>
<a name="line-84"></a> <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-conid'>C'pkgiterator</span><span class='hs-layout'>)</span>
<a name="line-85"></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'>"&pkg_db_iter_new"</span> <span class='hs-varid'>p'pkg_db_iter_new</span>
<a name="line-86"></a> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FunPtr</span> <span class='hs-layout'>(</span><span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>C'pkgiterator</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-87"></a>
<a name="line-88"></a><span class='hs-comment'>{-# LINE 50 "Debian/Dpkg/DB.hsc" #-}</span>
<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'>"pkg_db_iter_next_pkg"</span> <span class='hs-varid'>c'pkg_db_iter_next_pkg</span>
<a name="line-90"></a> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>C'pkgiterator</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-conid'>C'pkginfo</span><span class='hs-layout'>)</span>
<a name="line-91"></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'>"&pkg_db_iter_next_pkg"</span> <span class='hs-varid'>p'pkg_db_iter_next_pkg</span>
<a name="line-92"></a> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FunPtr</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>C'pkgiterator</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-conid'>C'pkginfo</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-93"></a>
<a name="line-94"></a><span class='hs-comment'>{-# LINE 51 "Debian/Dpkg/DB.hsc" #-}</span>
<a name="line-95"></a>
<a name="line-96"></a><a name="msdbInit"></a><span class='hs-definition'>msdbInit</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-97"></a><span class='hs-definition'>msdbInit</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-98"></a> <span class='hs-varid'>c'push_error_context</span>
<a name="line-99"></a> <span class='hs-varid'>c'modstatdb_open</span> <span class='hs-num'>0</span>
<a name="line-100"></a> <span class='hs-varid'>withCString</span> <span class='hs-str'>"haskell-dpkg"</span> <span class='hs-varid'>c'dpkg_set_progname</span>
<a name="line-101"></a>
<a name="line-102"></a><a name="setDbDir"></a><span class='hs-definition'>setDbDir</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-103"></a><span class='hs-definition'>setDbDir</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>withCString</span> <span class='hs-varid'>x</span> <span class='hs-varid'>c'dpkg_db_set_dir</span>
<a name="line-104"></a>
<a name="line-105"></a><a name="pkgDbIterNext"></a><span class='hs-definition'>pkgDbIterNext</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>C'pkgiterator</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-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>C'pkginfo</span><span class='hs-layout'>,</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>C'pkgiterator</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-106"></a><span class='hs-definition'>pkgDbIterNext</span> <span class='hs-varid'>i</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-107"></a> <span class='hs-varid'>pptr</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>c'pkg_db_iter_next_pkg</span> <span class='hs-varid'>i</span>
<a name="line-108"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>pptr</span> <span class='hs-varop'>==</span> <span class='hs-varid'>nullPtr</span>
<a name="line-109"></a> <span class='hs-keyword'>then</span>
<a name="line-110"></a> <span class='hs-varid'>return</span> <span class='hs-conid'>Nothing</span>
<a name="line-111"></a> <span class='hs-keyword'>else</span>
<a name="line-112"></a> <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'>pptr</span><span class='hs-layout'>,</span> <span class='hs-varid'>i</span><span class='hs-layout'>)</span>
<a name="line-113"></a>
<a name="line-114"></a><a name="pkgpList"></a><span class='hs-definition'>pkgpList</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>C'pkginfo</span><span class='hs-keyglyph'>]</span>
<a name="line-115"></a><span class='hs-definition'>pkgpList</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>c'pkg_db_iter_new</span> <span class='hs-varop'>>>=</span> <span class='hs-varid'>unfoldrM</span> <span class='hs-layout'>(</span><span class='hs-varid'>pkgDbIterNext</span><span class='hs-layout'>)</span>
<a name="line-116"></a>
<a name="line-117"></a><a name="pkgList"></a><span class='hs-definition'>pkgList</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>C'pkginfo</span><span class='hs-keyglyph'>]</span>
<a name="line-118"></a><span class='hs-definition'>pkgList</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>pkgpList</span> <span class='hs-varop'>>>=</span> <span class='hs-varid'>mapM</span> <span class='hs-varid'>peek</span>
<a name="line-119"></a>
<a name="line-120"></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'>"parseversion"</span> <span class='hs-varid'>c'parseversion</span>
<a name="line-121"></a> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>C'dpkg_version</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>CString</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>C'dpkg_error</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>CInt</span>
<a name="line-122"></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'>"&parseversion"</span> <span class='hs-varid'>p'parseversion</span>
<a name="line-123"></a> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FunPtr</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>C'dpkg_version</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>CString</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>C'dpkg_error</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>CInt</span><span class='hs-layout'>)</span>
<a name="line-124"></a>
<a name="line-125"></a><span class='hs-comment'>{-# LINE 77 "Debian/Dpkg/DB.hsc" #-}</span>
<a name="line-126"></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'>"dpkg_version_compare"</span> <span class='hs-varid'>c'dpkg_version_compare</span>
<a name="line-127"></a> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>C'dpkg_version</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>C'dpkg_version</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>CInt</span>
<a name="line-128"></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'>"&dpkg_version_compare"</span> <span class='hs-varid'>p'dpkg_version_compare</span>
<a name="line-129"></a> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FunPtr</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>C'dpkg_version</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>C'dpkg_version</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>CInt</span><span class='hs-layout'>)</span>
<a name="line-130"></a>
<a name="line-131"></a><span class='hs-comment'>{-# LINE 78 "Debian/Dpkg/DB.hsc" #-}</span>
<a name="line-132"></a>
<a name="line-133"></a><a name="parseVersion"></a><span class='hs-definition'>parseVersion</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>BS</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-layout'>(</span><span class='hs-conid'>Either</span> <span class='hs-conid'>String</span> <span class='hs-conid'>C'dpkg_version</span><span class='hs-layout'>)</span>
<a name="line-134"></a><span class='hs-definition'>parseVersion</span> <span class='hs-varid'>verstr</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>useAsCString</span> <span class='hs-varid'>verstr</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>vercstr</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>alloca</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>vrptr</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>alloca</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>deptr</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-135"></a> <span class='hs-varid'>i</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>c'parseversion</span> <span class='hs-varid'>vrptr</span> <span class='hs-varid'>vercstr</span> <span class='hs-varid'>deptr</span>
<a name="line-136"></a> <span class='hs-varid'>vr</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>peek</span> <span class='hs-varid'>vrptr</span>
<a name="line-137"></a> <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-138"></a> <span class='hs-keyword'>then</span>
<a name="line-139"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Right</span> <span class='hs-varid'>vr</span>
<a name="line-140"></a> <span class='hs-keyword'>else</span>
<a name="line-141"></a> <span class='hs-keyword'>do</span>
<a name="line-142"></a> <span class='hs-varid'>de</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>peek</span> <span class='hs-varid'>deptr</span>
<a name="line-143"></a> <span class='hs-varid'>errmsg</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>peekCString</span> <span class='hs-layout'>(</span><span class='hs-varid'>c'dpkg_error'str</span> <span class='hs-varid'>de</span><span class='hs-layout'>)</span>
<a name="line-144"></a> <span class='hs-keyword'>if</span> <span class='hs-layout'>(</span><span class='hs-varid'>c'dpkg_error'type</span> <span class='hs-varid'>de</span><span class='hs-layout'>)</span> <span class='hs-varop'>==</span> <span class='hs-num'>1</span>
<a name="line-145"></a> <span class='hs-keyword'>then</span>
<a name="line-146"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Right</span> <span class='hs-varid'>vr</span>
<a name="line-147"></a> <span class='hs-keyword'>else</span>
<a name="line-148"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Left</span> <span class='hs-varid'>errmsg</span>
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