<?php

function exec_sql($sql)
{
	if(!mysql_query($sql))
	{
		print "Unable to execute SQL statement ($sql): ".mysql_error()."\n";
		exit(1);
	}
}

function split_sql($sql, $handler_func)
{
	$in_string = false;
	$in_comment = false;
	$start = 0;
	$len = strlen($sql);

	for($i = 0; $i < $len; $i++)
	{
		if(($sql[$i] == "#" || ($sql[$i] == "-" && $sql[$i + 1] == "-")) && !$in_string)
		{
			$in_comment = true;
			continue;
		}

		if($sql[$i] == "\n" && $in_comment)
		{
			$in_comment = false;
			$start = $i + 1;
			continue;
		}

		if($in_comment)
		{
			continue;
		}

		if($sql[$i] == ";" && !$in_string)
		{
			$statement = substr($sql, $start, $i - $start);
			if(!preg_match("/^[ \n\r\t]*$/", $statement))
			{
				call_user_func($handler_func, $statement);
			}
			$start = $i + 1;
		}

		if($sql[$i] == $in_string && $sql[$i - 1] != "\\")
		{
			$in_string = false;
		}
		elseif(($sql[$i] == '"' || $sql[$i] == "'") && !$in_string && ($i > 0 && $sql[$i - 1] != "\\"))
		{
			$in_string = $sql[$i];
		}
	}

	if(!$in_comment)
	{
		$statement = substr($sql, $start);

		if(!preg_match("/^[ \n\r\t]*$/", $statement))
		{
			call_user_func($handler_func, $statement);
		}
	}
}

function mysql_db_connect($dbaddress, $dblogin, $dbpassword, $dbname)
{
	if(!mysql_connect($dbaddress, $dblogin, $dbpassword))
	{
		print "Unable to connect to DB: ".mysql_error()."\n";
		exit(1);
	}

	if(!mysql_select_db($dbname))
	{
		print "Unable to select $dbname database: ".mysql_error()."\n";
		exit(1);
	}
}

function populate_mysql_db($sql)
{
	$sql = split_sql($sql, "exec_sql");
}