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<pre><a name="line-1"></a><span class='hs-comment'>{-
<a name="line-2"></a> DpkgVersion.hs: Haskell bindings to libdpkg
<a name="line-3"></a> Copyright (C) 2011-2012 Clint Adams
<a name="line-4"></a>
<a name="line-5"></a> This program is free software; you can redistribute it and/or modify
<a name="line-6"></a> it under the terms of the GNU General Public License as published by
<a name="line-7"></a> the Free Software Foundation; either version 3 of the License, or
<a name="line-8"></a> (at your option) any later version.
<a name="line-9"></a>
<a name="line-10"></a> This program is distributed in the hope that it will be useful,
<a name="line-11"></a> but WITHOUT ANY WARRANTY; without even the implied warranty of
<a name="line-12"></a> MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
<a name="line-13"></a> GNU General Public License for more details.
<a name="line-14"></a>
<a name="line-15"></a> You should have received a copy of the GNU General Public License
<a name="line-16"></a> along with this program; if not, write to the Free Software
<a name="line-17"></a> Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
<a name="line-18"></a>-}</span>
<a name="line-19"></a>
<a name="line-20"></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'>DpkgVersion</span> <span class='hs-layout'>(</span>
<a name="line-21"></a> <span class='hs-varid'>peekDpkgVersion</span>
<a name="line-22"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>getConfigVersion</span>
<a name="line-23"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>DpkgVersion</span><span class='hs-layout'>(</span><span class='hs-conid'>DpkgVersion</span><span class='hs-layout'>,</span><span class='hs-varid'>vr_epoch</span><span class='hs-layout'>,</span><span class='hs-varid'>vr_version</span><span class='hs-layout'>,</span><span class='hs-varid'>vr_revision</span><span class='hs-layout'>)</span>
<a name="line-24"></a><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-25"></a>
<a name="line-26"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span><span class='hs-varop'>.</span><span class='hs-conid'>Char8</span> <span class='hs-layout'>(</span><span class='hs-varid'>unpack</span><span class='hs-layout'>)</span>
<a name="line-27"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Foreign</span><span class='hs-varop'>.</span><span class='hs-conid'>Ptr</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span><span class='hs-layout'>)</span>
<a name="line-28"></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-29"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>IO</span><span class='hs-varop'>.</span><span class='hs-conid'>Unsafe</span> <span class='hs-layout'>(</span><span class='hs-varid'>unsafePerformIO</span><span class='hs-layout'>)</span>
<a name="line-30"></a>
<a name="line-31"></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-32"></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'>DB</span> <span class='hs-layout'>(</span><span class='hs-varid'>c'parseversion</span><span class='hs-layout'>,</span> <span class='hs-varid'>c'dpkg_version_compare</span><span class='hs-layout'>)</span>
<a name="line-33"></a>
<a name="line-34"></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-35"></a>
<a name="line-36"></a><span class='hs-comment'>-- #starttype struct dpkg_version</span>
<a name="line-37"></a><span class='hs-comment'>-- #field epoch , CInt</span>
<a name="line-38"></a><span class='hs-comment'>-- #field version , CString</span>
<a name="line-39"></a><span class='hs-comment'>-- #field revision , CString</span>
<a name="line-40"></a><span class='hs-comment'>-- #stoptype</span>
<a name="line-41"></a>
<a name="line-42"></a><a name="peekDpkgVersion"></a><span class='hs-definition'>peekDpkgVersion</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>C'dpkg_version</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>DpkgVersion</span>
<a name="line-43"></a><span class='hs-definition'>peekDpkgVersion</span> <span class='hs-varid'>vr</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-44"></a> <span class='hs-varid'>v</span> <span class='hs-keyglyph'><-</span> <span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>packCString</span> <span class='hs-layout'>(</span><span class='hs-varid'>c'dpkg_version'version</span> <span class='hs-varid'>vr</span><span class='hs-layout'>)</span>
<a name="line-45"></a> <span class='hs-varid'>r</span> <span class='hs-keyglyph'><-</span> <span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>packCString</span> <span class='hs-layout'>(</span><span class='hs-varid'>c'dpkg_version'revision</span> <span class='hs-varid'>vr</span><span class='hs-layout'>)</span>
<a name="line-46"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-conid'>DpkgVersion</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-layout'>(</span><span class='hs-varid'>c'dpkg_version'epoch</span> <span class='hs-varid'>vr</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>v</span> <span class='hs-varid'>r</span>
<a name="line-47"></a>
<a name="line-48"></a><a name="getConfigVersion"></a><span class='hs-definition'>getConfigVersion</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>C'pkginfo</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>String</span>
<a name="line-49"></a><span class='hs-definition'>getConfigVersion</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-50"></a> <span class='hs-varid'>vr</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>peekDpkgVersion</span> <span class='hs-layout'>(</span><span class='hs-varid'>c'pkginfo'configversion</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span>
<a name="line-51"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromIntegral</span> <span class='hs-layout'>(</span><span class='hs-varid'>vr_epoch</span> <span class='hs-varid'>vr</span><span class='hs-layout'>)</span>
<a name="line-52"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>v</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>vr_version</span> <span class='hs-varid'>vr</span>
<a name="line-53"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>r</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>vr_revision</span> <span class='hs-varid'>vr</span>
<a name="line-54"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-varid'>nonZeroEpoch</span> <span class='hs-varid'>e</span> <span class='hs-varop'>++</span> <span class='hs-layout'>(</span><span class='hs-varid'>unpack</span> <span class='hs-varid'>v</span><span class='hs-layout'>)</span> <span class='hs-varop'>++</span> <span class='hs-varid'>nonNativeRevision</span> <span class='hs-varid'>r</span>
<a name="line-55"></a> <span class='hs-keyword'>where</span>
<a name="line-56"></a> <span class='hs-varid'>nonZeroEpoch</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>e</span> <span class='hs-varop'>==</span> <span class='hs-num'>0</span> <span class='hs-keyword'>then</span> <span class='hs-str'>""</span> <span class='hs-keyword'>else</span> <span class='hs-layout'>(</span><span class='hs-varid'>show</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-varop'>++</span> <span class='hs-str'>":"</span>
<a name="line-57"></a> <span class='hs-varid'>nonNativeRevision</span> <span class='hs-varid'>r</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>r</span> <span class='hs-varop'>==</span> <span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>empty</span> <span class='hs-keyword'>then</span> <span class='hs-layout'>(</span><span class='hs-varid'>unpack</span> <span class='hs-varid'>r</span><span class='hs-layout'>)</span> <span class='hs-keyword'>else</span> <span class='hs-str'>"-"</span> <span class='hs-varop'>++</span> <span class='hs-layout'>(</span><span class='hs-varid'>unpack</span> <span class='hs-varid'>r</span><span class='hs-layout'>)</span>
<a name="line-58"></a>
<a name="line-59"></a><a name="DpkgVersion"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>DpkgVersion</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>DpkgVersion</span> <span class='hs-layout'>{</span>
<a name="line-60"></a> <span class='hs-varid'>vr_epoch</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int</span><span class='hs-layout'>,</span>
<a name="line-61"></a> <span class='hs-varid'>vr_version</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-layout'>,</span>
<a name="line-62"></a> <span class='hs-varid'>vr_revision</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span>
<a name="line-63"></a><span class='hs-layout'>}</span> <span class='hs-keyword'>deriving</span> <span class='hs-layout'>(</span><span class='hs-conid'>Eq</span><span class='hs-layout'>,</span><span class='hs-conid'>Show</span><span class='hs-layout'>)</span>
<a name="line-64"></a>
<a name="line-65"></a><a name="cvrpCompare"></a><span class='hs-definition'>cvrpCompare</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'>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'>Ordering</span>
<a name="line-66"></a><span class='hs-definition'>cvrpCompare</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-67"></a> <span class='hs-varid'>r</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>c'dpkg_version_compare</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span>
<a name="line-68"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>r</span> <span class='hs-keyword'>of</span>
<a name="line-69"></a> <span class='hs-comment'>-</span><span class='hs-num'>1</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-conid'>LT</span>
<a name="line-70"></a> <span class='hs-num'>0</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-conid'>EQ</span>
<a name="line-71"></a> <span class='hs-num'>1</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-conid'>GT</span>
<a name="line-72"></a>
<a name="line-73"></a><a name="cvrCompare"></a><span class='hs-definition'>cvrCompare</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>C'dpkg_version</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>C'dpkg_version</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ordering</span>
<a name="line-74"></a><span class='hs-definition'>cvrCompare</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>unsafePerformIO</span> <span class='hs-varop'>.</span><span class='hs-layout'>)</span> <span class='hs-varop'>.</span> <span class='hs-layout'>(</span><span class='hs-varop'>.</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varop'>.</span> <span class='hs-varid'>cvrpCompare</span><span class='hs-layout'>)</span> <span class='hs-varop'>.</span> <span class='hs-varid'>with</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varop'>.</span> <span class='hs-varid'>with</span>
<a name="line-75"></a>
<a name="line-76"></a><a name="instance%20Ord%20C'dpkg_version"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Ord</span> <span class='hs-conid'>C'dpkg_version</span> <span class='hs-keyword'>where</span>
<a name="line-77"></a> <span class='hs-varid'>compare</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>cvrCompare</span>
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