<?php
/** 
* @package	uForum 
* @file		includes/sql_parse.php
* @version	$Id$ 
* @copyright	2007-2010 (c) PioDer <pioder@wp.pl>
* @link    		http://www.pioder.pl/
* @license	see LICENSE.txt
* @note		Originally, phpMyAdmin function
**/
function remove_comments(&$output)
{
	$lines = explode("\n", $output);
	$output = "";
	$linecount = count($lines);
	$in_comment = false;
	for($i = 0; $i < $linecount; $i++)
	{
		if( preg_match("/^\/\*/", preg_quote($lines[$i])) )
		{
			$in_comment = true;
		}
		if( !$in_comment )
		{
			$output .= $lines[$i] . "\n";
		}
		if( preg_match("/\*\/$/", preg_quote($lines[$i])) )
		{
			$in_comment = false;
		}
	}
	unset($lines);
	return $output;
}

function remove_remarks($sql)
{
	$lines = explode("\n", $sql);
	$sql = "";
	$linecount = count($lines);
	$output = "";
	for ($i = 0; $i < $linecount; $i++)
	{
		if (($i != ($linecount - 1)) || (strlen($lines[$i]) > 0))
		{
			if ($lines[$i][0] != "#")
			{
				$output .= $lines[$i] . "\n";
			}
			else
			{
				$output .= "\n";
			}
			$lines[$i] = "";
		}
	}
	return $output;	
}

function split_sql_file($sql)
{
	$delimiter = ';';
	$tokens = explode($delimiter, $sql);
	$sql = "";
	$output = array();
	$matches = array();
	$token_count = count($tokens);
	for ($i = 0; $i < $token_count; $i++)
	{
		if (($i != ($token_count - 1)) || (strlen($tokens[$i] > 0)))
		{
			$total_quotes = preg_match_all("/'/", $tokens[$i], $matches);
			$escaped_quotes = preg_match_all("/(?<!\\\\)(\\\\\\\\)*\\\\'/", $tokens[$i], $matches);
			$unescaped_quotes = $total_quotes - $escaped_quotes;			
			if (($unescaped_quotes % 2) == 0)
			{
				$output[] = $tokens[$i];
				$tokens[$i] = "";
			}
			else
			{
				$temp = $tokens[$i] . $delimiter;
				$tokens[$i] = ""; 
				$complete_stmt = false;
				for ($j = $i + 1; (!$complete_stmt && ($j < $token_count)); $j++)
				{
					$total_quotes = preg_match_all("/'/", $tokens[$j], $matches);
					$escaped_quotes = preg_match_all("/(?<!\\\\)(\\\\\\\\)*\\\\'/", $tokens[$j], $matches);
					$unescaped_quotes = $total_quotes - $escaped_quotes;
					if (($unescaped_quotes % 2) == 1)
					{
						$output[] = $temp . $tokens[$j];
						$tokens[$j] = "";
						$temp = "";
						$complete_stmt = true;
						$i = $j;
					}
					else
					{
						$temp .= $tokens[$j] . $delimiter;
						$tokens[$j] = "";
					}
					
				}
			}
		}
	}
	return $output;
}
?>