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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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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='#CLASS_METHODS'>CLASS METHODS</a>
  <li class='indexItem indexItem1'><a href='#INSTANCE_METHODS'>INSTANCE METHODS</a>
  <li class='indexItem indexItem1'><a href='#DIAGNOSTICS'>DIAGNOSTICS</a>
  <li class='indexItem indexItem1'><a href='#AUTHOR'>AUTHOR</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::SlidingWindow - Lintian interface to sliding window match</p>

<h1><a class='u' href='#___top' title='click to go to top of document'
name="SYNOPSIS"
>SYNOPSIS</a></h1>

<pre>    use Lintian::SlidingWindow;

    my $sfd = Lintian::SlidingWindow-&#62;new(&#39;&#60;&#39;,&#39;someevilfile.c&#39;, sub { $_ = lc($_); });
    my $window;
    while ($window = $sfd-&#62;readwindow()) {
       if (index($window, &#39;evil&#39;) &#62; -1) {
           if($window =~
                 m/software \s++ shall \s++
                   be \s++ used \s++ for \s++ good \s*+ ,?+ \s*+
                   not \s++ evil/xsim) {
              # do something like : tag &#39;license-problem-json-evil&#39;;
           }
       }
    }</pre>

<h1><a class='u' href='#___top' title='click to go to top of document'
name="DESCRIPTION"
>DESCRIPTION</a></h1>

<p>Lintian::SlidingWindow provides a way of matching some pattern, including multi line pattern, without needing to fully load the file in memory.</p>

<h1><a class='u' href='#___top' title='click to go to top of document'
name="CLASS_METHODS"
>CLASS METHODS</a></h1>

<dl>
<dt><a name="new(HANDLE[,_BLOCKSUB[,_BLOCKSIZE]])"
>new(HANDLE[, BLOCKSUB[, BLOCKSIZE]])</a></dt>

<dd>
<p>Create a new sliding window by reading from a given HANDLE, which must be open for reading. Optionally run BLOCKSUB against each block. Note that BLOCKSUB should apply transform byte by byte and does not depend of context.</p>

<p>Each window consists of up to two blocks of BLOCKSIZE characters.</p>
</dd>
</dl>

<h1><a class='u' href='#___top' title='click to go to top of document'
name="INSTANCE_METHODS"
>INSTANCE METHODS</a></h1>

<dl>
<dt><a name="readwindow"
>readwindow</a></dt>

<dd>
<p>Return a new block of sliding window. Return undef at end of file.</p>

<dt><a name="blocknumber"
>blocknumber</a></dt>

<dd>
<p>return the number of block read by the instance. Return undef if no block has been read.</p>
</dd>
</dl>

<h1><a class='u' href='#___top' title='click to go to top of document'
name="DIAGNOSTICS"
>DIAGNOSTICS</a></h1>

<dl>
<dt><a name="no_data_type_specified"
>no data type specified</a></dt>
</dl>

<h1><a class='u' href='#___top' title='click to go to top of document'
name="AUTHOR"
>AUTHOR</a></h1>

<p>Originally written by Bastien ROUCARIES for Lintian.</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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