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<?php
/*************************
Coppermine Photo Gallery
************************
Copyright (c) 2003-2008 Dev Team
v1.1 originally written by Gregory DEMAR
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License version 3
as published by the Free Software Foundation.
********************************************
Coppermine version: 1.4.18
$HeadURL: https://coppermine.svn.sourceforge.net/svnroot/coppermine/trunk/cpg1.4.x/include/sql_parse.php $
$Revision: 4380 $
$Author: gaugau $
$Date: 2008-04-12 12:00:19 +0200 (Sa, 12 Apr 2008) $
**********************************************/
/**
* sql_parse.php
* -------------------
* begin : Thu May 31, 2001
* copyright : (C) 2001 The phpBB Group
* email : support@phpbb.com
*
* $Id: sql_parse.php 4380 2008-04-12 10:00:19Z gaugau $
*/
/**
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 3
* as published by the Free Software Foundation.
*
*/
/**
* These functions are mainly for use in the db_utilities under the admin
* however in order to make these functions available elsewhere, specifically
* in the installation phase of phpBB I have seperated out a couple of
* functions into this file. JLH
*
* \**************************************************************************
*/
// remove_comments will strip the sql comment lines out of an uploaded sql file
// specifically for mssql and postgres type files in the install....
function remove_comments(&$output)
{
$lines = explode("\n", $output);
$output = "";
// try to keep mem. use down
$linecount = count($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 $output;
}
// remove_remarks will strip the sql comment lines out of an uploaded sql file
function remove_remarks($sql)
{
$lines = explode("\n", $sql);
// try to keep mem. use down
$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";
}
// Trading a bit of speed for lower mem. use here.
$lines[$i] = "";
}
}
return $output;
}
// split_sql_file will split an uploaded sql file into single sql statements.
// Note: expects trim() to have already been run on $sql.
function split_sql_file($sql, $delimiter)
{
// Split up our string into "possible" SQL statements.
$tokens = explode($delimiter, $sql);
// try to save mem.
$sql = "";
$output = array();
// we don't actually care about the matches preg gives us.
$matches = array();
// this is faster than calling count($oktens) every time thru the loop.
$token_count = count($tokens);
for ($i = 0; $i < $token_count; $i++) {
// Don't wanna add an empty string as the last thing in the array.
if (($i != ($token_count - 1)) || (strlen($tokens[$i] > 0))) {
// This is the total number of single quotes in the token.
$total_quotes = preg_match_all("/'/", $tokens[$i], $matches);
// Counts single quotes that are preceded by an odd number of backslashes,
// which means they're escaped quotes.
$escaped_quotes = preg_match_all("/(?<!\\\\)(\\\\\\\\)*\\\\'/", $tokens[$i], $matches);
$unescaped_quotes = $total_quotes - $escaped_quotes;
// If the number of unescaped quotes is even, then the delimiter did NOT occur inside a string literal.
if (($unescaped_quotes % 2) == 0) {
// It's a complete sql statement.
$output[] = $tokens[$i];
// save memory.
$tokens[$i] = "";
} else {
// incomplete sql statement. keep adding tokens until we have a complete one.
// $temp will hold what we have so far.
$temp = $tokens[$i] . $delimiter;
// save memory..
$tokens[$i] = "";
// Do we have a complete statement yet?
$complete_stmt = false;
for ($j = $i + 1; (!$complete_stmt && ($j < $token_count)); $j++) {
// This is the total number of single quotes in the token.
$total_quotes = preg_match_all("/'/", $tokens[$j], $matches);
// Counts single quotes that are preceded by an odd number of backslashes,
// which means they're escaped quotes.
$escaped_quotes = preg_match_all("/(?<!\\\\)(\\\\\\\\)*\\\\'/", $tokens[$j], $matches);
$unescaped_quotes = $total_quotes - $escaped_quotes;
if (($unescaped_quotes % 2) == 1) {
// odd number of unescaped quotes. In combination with the previous incomplete
// statement(s), we now have a complete statement. (2 odds always make an even)
$output[] = $temp . $tokens[$j];
// save memory.
$tokens[$j] = "";
$temp = "";
// exit the loop.
$complete_stmt = true;
// make sure the outer loop continues at the right point.
$i = $j;
} else {
// even number of unescaped quotes. We still don't have a complete statement.
// (1 odd and 1 even always make an odd)
$temp .= $tokens[$j] . $delimiter;
// save memory.
$tokens[$j] = "";
}
} // for..
} // else
}
}
return $output;
}
?>
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