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<?php
/*
+---------------------------------------------------------------------------
| Invision Power Services Kernel Module
| Invision Power Board
| ========================================
| by Matthew Mecham
| (c) 2005 Invision Power Services
| Nullified by Terabyte
| ========================================
+---------------------------------------------------------------------------
|
| > Difference Engine.
| > Script written by Matt Mecham
| > Date started: Thursday 10th February 2005 (10:47)
|
+---------------------------------------------------------------------------
*/
/**
* Differences class
*
* Get file differences
*
* @package IPS_KERNEL
* @author Matt Mecham
* @version 2.1
*/
if ( ! defined( 'IPS_CLASSES_PATH' ) )
{
/**
* Define classes path
*/
define( 'IPS_CLASSES_PATH', dirname(__FILE__) );
}
/**
* Differences class
*
* Get file differences
*
* @package IPS_KERNEL
* @author Matt Mecham
* @version 2.1
*/
class class_difference
{
# Globals
/**
* Shell command
*
* @var string
*/
var $diff_command = 'diff';
/**
* Type of diff to use
*
* @var integer
*/
var $method = 'exec';
/**
* Differences found?
*
* @var integer
*/
var $diff_found = 0;
/**
* Post process DIFF result?
*
* @var integer
*/
var $post_process = 1;
/*-------------------------------------------------------------------------*/
// Constructor
/*-------------------------------------------------------------------------*/
function class_difference()
{
//-------------------------------
// Server?
//-------------------------------
if ( (substr(PHP_OS, 0, 3) == 'WIN') OR ( ! function_exists('exec') ) )
{
$this->method = 'CGI';
}
}
/*-------------------------------------------------------------------------*/
// Produce difference output
// //@header("Content-type: text/plain"); print_r($diff_res_array); exit();
/*-------------------------------------------------------------------------*/
/**
* Wrapper function to get differences
*
* @return string Diff data
*/
function get_differences( $str1, $str2 )
{
$this->diff_found = 0;
$str1 = $this->_diff_tag_space($str1);
$str2 = $this->_diff_tag_space($str2);
$str1_lines = $this->_diff_explode_string_into_words($str1);
$str2_lines = $this->_diff_explode_string_into_words($str2);
if ( $this->method == 'CGI' )
{
$diff_res = $this->_get_cgi_diff( implode( chr(10), $str1_lines ).chr(10), implode( chr(10), $str2_lines ).chr(10) );
}
else if ( $this->method == 'PHP' )
{
$diff_res = $this->_get_php_diff( implode( chr(10), $str1_lines ).chr(10), implode( chr(10), $str2_lines ).chr(10) );
}
else
{
$diff_res = $this->_get_exec_diff( implode( chr(10), $str1_lines ).chr(10), implode( chr(10), $str2_lines ).chr(10) );
}
//-------------------------------
// Post process?
//-------------------------------
if ( $this->post_process )
{
if ( is_array($diff_res) )
{
reset($diff_res);
$c = 0;
$diff_res_array = array();
foreach( $diff_res as $l_val )
{
if ( intval($l_val) )
{
$c = intval($l_val);
$diff_res_array[$c]['changeInfo'] = $l_val;
}
if (substr($l_val,0,1) == '<')
{
$diff_res_array[$c]['old'][] = substr($l_val,2);
}
if (substr($l_val,0,1) == '>')
{
$diff_res_array[$c]['new'][] = substr($l_val,2);
}
}
$out_str = '';
$clr_buffer = '';
for ( $a = -1; $a < count($str1_lines); $a++ )
{
if ( is_array( $diff_res_array[$a+1] ) )
{
if ( strstr( $diff_res_array[$a+1]['changeInfo'], 'a') )
{
$this->diff_found = 1;
$clr_buffer .= htmlspecialchars($str1_lines[$a]).' ';
}
$out_str .= $clr_buffer;
$clr_buffer = '';
if (is_array($diff_res_array[$a+1]['old']))
{
$this->diff_found = 1;
$out_str.='<del style="-ips-match:1">'.htmlspecialchars(implode(' ',$diff_res_array[$a+1]['old'])).'</del> ';
}
if (is_array($diff_res_array[$a+1]['new']))
{
$this->diff_found = 1;
$out_str.='<ins style="-ips-match:1">'.htmlspecialchars(implode(' ',$diff_res_array[$a+1]['new'])).'</ins> ';
}
$cip = explode(',',$diff_res_array[$a+1]['changeInfo']);
if ( ! strcmp( $cip[0], $a + 1 ) )
{
$new_line = intval($cip[1])-1;
if ( $new_line > $a )
{
$a = $new_line;
}
}
}
else
{
$clr_buffer .= htmlspecialchars($str1_lines[$a]).' ';
}
}
$out_str .= $clr_buffer;
$out_str = str_replace(' ',chr(10),$out_str);
$out_str = $this->_diff_tag_space($out_str,1);
return $out_str;
}
}
else
{
return $diff_res;
}
}
/*-------------------------------------------------------------------------*/
// Adds space character after HTML tags
/*-------------------------------------------------------------------------*/
/**
* Adds space character after HTML tags
*
* @return string Converted string
*/
function _diff_tag_space( $str, $rev=0 )
{
if ( $rev )
{
return str_replace(' <','<',str_replace('> ','>',$str) );
}
else
{
return str_replace('<',' <',str_replace('>','> ',$str) );
}
}
/*-------------------------------------------------------------------------*/
// Explodes input string into words
/*-------------------------------------------------------------------------*/
/**
* Explodes input string into words
*
* @return array
*/
function _diff_explode_string_into_words( $str )
{
$str_array = $this->_explode_trim( chr(10), $str );
$out_array = array();
reset($str_array);
foreach( $str_array as $low )
{
$all_words = $this->_explode_trim( ' ', $low, 1 );
$out_array = array_merge($out_array, $all_words);
$out_array[] = '';
$out_array[] = '';
}
return $out_array;
}
/*-------------------------------------------------------------------------*/
// Explode into array and trim
/*-------------------------------------------------------------------------*/
/**
* Explode into array and trim
*
* @return array
*/
function _explode_trim( $delim, $str, $remove_blank=0 )
{
$tmp = explode( $delim, trim($str) );
$final = array();
foreach( $tmp as $i )
{
if ( $remove_blank AND ! $i )
{
continue;
}
else
{
$final[] = trim($i);
}
}
return $final;
}
/*-------------------------------------------------------------------------*/
// Produce differences using PHP
/*-------------------------------------------------------------------------*/
/**
* Produce differences using PHP
*
* @param string comapre string 1
* @param string comapre string 2
* @return string
*/
function _get_php_diff( $str1 , $str2 )
{
$str1 = explode( "\n", str_replace( "\r\n", "\n", $str1 ) );
$str2 = explode( "\n", str_replace( "\r\n", "\n", $str2 ) );
include_once KERNEL_PATH.'PEAR/Text/Diff.php';
include_once KERNEL_PATH.'PEAR/Text/Diff/Renderer.php';
include_once KERNEL_PATH.'PEAR/Text/Diff/Renderer/inline.php';
$diff = new Text_Diff( $str1,$str2 );
$renderer = new Text_Diff_Renderer_inline();
$result = $renderer->render($diff);
# Inline formatting adjustments
$result = htmlspecialchars( $result );
$result = str_replace( "<ins>", '<ins style="-ips-match:1">', $result );
$result = str_replace( "<del>", '<del style="-ips-match:1">', $result );
$result = preg_replace( "#</(ins|del)>#", "</\\1>", $result );
# Got a match?
if ( strstr( $result, 'style="-ips-match:1"' ) )
{
$this->diff_found = 1;
}
# No post processing please
$this->post_process = 0;
# Convert lines to a space, and two spaces to a single line
$result = str_replace(' ', chr(10), str_replace( "\n", " ", $result ) );
$result = $this->_diff_tag_space($result,1);
return $result;
}
/*-------------------------------------------------------------------------*/
// Produce differences using unix
/*-------------------------------------------------------------------------*/
/**
* Produce differences using unix
*
* @return string
*/
function _get_exec_diff( $str1, $str2 )
{
//-------------------------------
// Write the tmp files
//-------------------------------
$file1 = ROOT_PATH.'uploads/'.time().'-1';
$file2 = ROOT_PATH.'uploads/'.time().'-2';
if ( $FH1 = @fopen( $file1, 'w' ) )
{
@fwrite( $FH1, $str1, strlen($str1) );
@fclose( $FH1 );
}
if ( $FH2 = @fopen( $file2, 'w' ) )
{
@fwrite( $FH2, $str2, strlen($str2) );
@fclose( $FH2 );
}
//-------------------------------
// Check
//-------------------------------
if ( file_exists( $file1 ) and file_exists( $file2 ) )
{
exec( $this->diff_command.' '.$file1.' '.$file2, $result );
@unlink( $file1 );
@unlink( $file2 );
return $result;
}
else
{
return "Error, files not written to disk";
}
}
/*-------------------------------------------------------------------------*/
// Produce differences using unix
/*-------------------------------------------------------------------------*/
/**
* Produce differences using CGI
*
* @return string
*/
function _get_cgi_diff( $str1, $str2 )
{
//-----------------------------------------
// Load file management class
//-----------------------------------------
require_once( IPS_CLASSES_PATH.'/class_file_management.php' );
$this->class_file_management = new class_file_management();
$this->class_file_management->use_sockets = $this->ipsclass->vars['enable_sockets'];
//-------------------------------
// Write the tmp files
//-------------------------------
$file1 = 'tmp-1';
$file2 = 'tmp-2';
if ( $FH1 = @fopen( ROOT_PATH.'uploads/'.$file1, 'w' ) )
{
@fwrite( $FH1, $str1, strlen($str1) );
@fclose( $FH1 );
}
if ( $FH2 = @fopen( ROOT_PATH.'uploads/'.$file2, 'w' ) )
{
@fwrite( $FH2, $str2, strlen($str2) );
@fclose( $FH2 );
}
//-------------------------------
// Check
//-------------------------------
if ( file_exists( ROOT_PATH.'uploads/'.$file1 ) AND file_exists( ROOT_PATH.'uploads/'.$file2 ) )
{
$result = $this->class_file_management->get_file_contents( $this->ipsclass->vars['base_url']."/".CP_DIRECTORY."/".IPS_CGI_DIRECTORY."/cgi_getdifference.cgi" );
@unlink( ROOT_PATH.'uploads/'.$file1 );
@unlink( ROOT_PATH.'uploads/'.$file2 );
return explode( "\n", $result );
}
else
{
return "Error, files not written to disk";
}
}
}
?>