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<?xml version='1.0' encoding="utf-8"?>
<!-- $Revision: 297078 $ -->
<!-- Generated by xml_proto.php v2.0. Found in /scripts directory of phpdoc. -->
<refentry xml:id="function.xdiff-file-rabdiff" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
<refnamediv>
<refname>xdiff_file_rabdiff</refname>
<refpurpose>Make binary diff of two files using the Rabin's polynomial fingerprinting algorithm</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type>bool</type><methodname>xdiff_file_rabdiff</methodname>
<methodparam><type>string</type><parameter>old_file</parameter></methodparam>
<methodparam><type>string</type><parameter>new_file</parameter></methodparam>
<methodparam><type>string</type><parameter>dest</parameter></methodparam>
</methodsynopsis>
<para>
Makes a binary diff of two files and stores the result in a patch file.
The difference between this function and <function>xdiff_file_bdiff</function> is different
algorithm used which should result in faster execution and smaller diff produced.
This function works with both text and binary files. Resulting patch
file can be later applied using <function>xdiff_file_bpatch</function>/<function>xdiff_string_bpatch</function>.
</para>
<para>
For more details about differences between algorithm used please check <link xlink:href="&url.xdiff;">libxdiff</link>
website.
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>old_file</parameter></term>
<listitem>
<para>
Path to the first file. This file acts as "old" file.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>new_file</parameter></term>
<listitem>
<para>
Path to the second file. This file acts as "new" file.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>dest</parameter></term>
<listitem>
<para>
Path of the resulting patch file. Resulting file contains differences
between "old" and "new" files. It is in binary format and is human-unreadable.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
&return.success;
</para>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<para>
<example>
<title><function>xdiff_file_rabdiff</function> example</title>
<para>
The following code makes binary diff of two archives.
</para>
<programlisting role="php">
<![CDATA[
<?php
$old_version = 'my_script_1.0.tgz';
$new_version = 'my_script_1.1.tgz';
xdiff_file_rabdiff($old_version, $new_version, 'my_script.bdiff');
?>
]]>
</programlisting>
</example>
</para>
</refsect1>
<refsect1 role="notes">
&reftitle.notes;
<note>
<para>
Both files will be loaded into memory so ensure that your memory_limit is
set high enough.
</para>
</note>
</refsect1>
<refsect1 role="seealso">
&reftitle.seealso;
<para>
<simplelist>
<member><function>xdiff_file_bpatch</function></member>
</simplelist>
</para>
</refsect1>
</refentry>
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