<?php
/***************************************************************************
*                             sql_parse.php
*                              -------------------
 *      Разработка: phpBB Group.
 *      Оптимизация под WAP: Гутник Игорь ( чел ).
 *          2010 год
****************************************************************************/

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;
}

?>