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<ul class='indexList indexList1'>
<li class='indexItem indexItem1'><a href='#NAME'>NAME</a>
<li class='indexItem indexItem1'><a href='#SYNOPSIS'>SYNOPSIS</a>
<li class='indexItem indexItem1'><a href='#DESCRIPTION'>DESCRIPTION</a>
<li class='indexItem indexItem1'><a href='#FUNCTIONS'>FUNCTIONS</a>
<li class='indexItem indexItem1'><a href='#AUTHOR'>AUTHOR</a>
<li class='indexItem indexItem1'><a href='#SEE_ALSO'>SEE ALSO</a>
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<h1><a class='u' href='#___top' title='click to go to top of document'
name="NAME"
>NAME</a></h1>
<p>Lintian::Relation::Version - Comparison operators on Debian versions</p>
<h1><a class='u' href='#___top' title='click to go to top of document'
name="SYNOPSIS"
>SYNOPSIS</a></h1>
<pre> print "yes\n" if versions_equal('1.0', '1.00');
print "yes\n" if versions_gte('1.1', '1.0');
print "no\n" if versions_lte('1.1', '1.0');
print "yes\n" if versions_gt('1.1', '1.0');
print "no\n" if versions_lt('1.1', '1.1');
print "yes\n" if versions_compare('1.1', '<=', '1.1');</pre>
<h1><a class='u' href='#___top' title='click to go to top of document'
name="DESCRIPTION"
>DESCRIPTION</a></h1>
<p>This module provides five functions for comparing version numbers. The underlying implementation uses <code>libapt-pkg-perl</code> to ensure that the results match what dpkg will expect.</p>
<h1><a class='u' href='#___top' title='click to go to top of document'
name="FUNCTIONS"
>FUNCTIONS</a></h1>
<dl>
<dt><a name="versions_equal(A,_B)"
>versions_equal(A, B)</a></dt>
<dd>
<p>Returns true if A is equal to B (<code>=</code>) and false otherwise.</p>
<dt><a name="versions_lte(A,_B)"
>versions_lte(A, B)</a></dt>
<dd>
<p>Returns true if A is less than or equal (<code><=</code>) to B and false otherwise.</p>
<dt><a name="versions_gte(A,_B)"
>versions_gte(A, B)</a></dt>
<dd>
<p>Returns true if A is greater than or equal (<code>>=</code>) to B and false otherwise.</p>
<dt><a name="versions_lt(A,_B)"
>versions_lt(A, B)</a></dt>
<dd>
<p>Returns true if A is less than (<code><<</code>) B and false otherwise.</p>
<dt><a name="versions_gt(A,_B)"
>versions_gt(A, B)</a></dt>
<dd>
<p>Returns true if A is greater than (<code>>></code>) B and false otherwise.</p>
<dt><a name="versions_compare(A,_OP,_B)"
>versions_compare(A, OP, B)</a></dt>
<dd>
<p>Returns true if A OP B, where OP is one of <code>=</code>, <code><=</code>, <code>>=</code>, <code><<</code>, or <code>>></code>, and false otherwise.</p>
<dt><a name="versions_comparator_(A,_B)"
>versions_comparator (A, B)</a></dt>
<dd>
<p>Returns -1, 0 or 1 if the version A is (respectively) less than, equal to or greater than B. This is useful for (e.g.) sorting a list of versions:</p>
<pre> foreach my $version (sort versions_comparator @versions) {
...
}</pre>
</dd>
</dl>
<h1><a class='u' href='#___top' title='click to go to top of document'
name="AUTHOR"
>AUTHOR</a></h1>
<p>Originally written by Russ Allbery <rra@debian.org> for Lintian and adapted to use libapt-pkg-perl by Adam D. Barratt <adam@adam-barratt-org.uk>.</p>
<h1><a class='u' href='#___top' title='click to go to top of document'
name="SEE_ALSO"
>SEE ALSO</a></h1>
<p>lintian(1)</p>
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