From cdc1597550cd76aecf67c1f6d254e398a1cb8396 Mon Sep 17 00:00:00 2001
From: natec <natec@users.sourceforge.net>
Date: Mon, 24 Sep 2001 21:50:04 +0000
Subject: Even speedier version (at least 15 times faster) of split_sql_file().
 wheeeeee.

git-svn-id: file:///svn/phpbb/trunk@1072 89ea8834-ac86-4346-8a33-228a782c2dd0
---
 phpBB/includes/sql_parse.php | 51 +++++++++++++++++++++++++++++++++++++++-----
 1 file changed, 46 insertions(+), 5 deletions(-)

(limited to 'phpBB/includes/sql_parse.php')

diff --git a/phpBB/includes/sql_parse.php b/phpBB/includes/sql_parse.php
index dcb0482e04..8f8a52b8f9 100644
--- a/phpBB/includes/sql_parse.php
+++ b/phpBB/includes/sql_parse.php
@@ -101,7 +101,8 @@ function split_sql_file($sql, $delimiter)
 {
 	// Split up our string into "possible" SQL statements.
 	$tokens = explode($delimiter, $sql);
-	// try to save memory.
+
+	// try to save mem.
 	$sql = "";
 	$output = array();
 	
@@ -133,11 +134,51 @@ function split_sql_file($sql, $delimiter)
 			}
 			else
 			{
-				// it's not complete, so prepend it onto the next token and continue the loop as usual.
-				$tokens[$i + 1] = $tokens[$i] . $delimiter .  $tokens[$i + 1];
-				// save memory.
+				// 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
 		}
 	}
 
-- 
cgit v1.2.1