Some sweeping syntax changes for consistency:

(! foo) changed to ( ! foo)
|| changed to OR
changed newline standardization code in various places from preg_replace to str_replace
diff --git a/system/libraries/Upload.php b/system/libraries/Upload.php
index 07cbd92..1225ee3 100644
--- a/system/libraries/Upload.php
+++ b/system/libraries/Upload.php
@@ -1,4 +1,4 @@
-<?php  if (!defined('BASEPATH')) exit('No direct script access allowed');

+<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');

 /**

  * CodeIgniter

  *

@@ -135,23 +135,23 @@
 	function do_upload($field = 'userfile')

 	{

 		// Is $_FILES[$field] set? If not, no reason to continue.

-		if (! isset($_FILES[$field]))

+		if ( ! isset($_FILES[$field]))

 		{

 			$this->set_error('upload_no_file_selected');

 			return FALSE;

 		}

 		

 		// Is the upload path valid?

-		if (! $this->validate_upload_path())

+		if ( ! $this->validate_upload_path())

 		{

 			// errors will already be set by validate_upload_path() so just return FALSE

 			return FALSE;

 		}

 						

 		// Was the file able to be uploaded? If not, determine the reason why.

-		if (! is_uploaded_file($_FILES[$field]['tmp_name']))

+		if ( ! is_uploaded_file($_FILES[$field]['tmp_name']))

 		{

-			$error = (! isset($_FILES[$field]['error'])) ? 4 : $_FILES[$field]['error'];

+			$error = ( ! isset($_FILES[$field]['error'])) ? 4 : $_FILES[$field]['error'];

 

 			switch($error)

 			{

@@ -198,14 +198,14 @@
 		}

 

 		// Is the file type allowed to be uploaded?

-		if (! $this->is_allowed_filetype())

+		if ( ! $this->is_allowed_filetype())

 		{

 			$this->set_error('upload_invalid_filetype');

 			return FALSE;

 		}

 

 		// Is the file size within the allowed maximum?

-		if (! $this->is_allowed_filesize())

+		if ( ! $this->is_allowed_filesize())

 		{

 			$this->set_error('upload_invalid_filesize');

 			return FALSE;

@@ -213,7 +213,7 @@
 

 		// Are the image dimensions within the allowed size?

 		// Note: This can fail if the server has an open_basdir restriction.

-		if (! $this->is_allowed_dimensions())

+		if ( ! $this->is_allowed_dimensions())

 		{

 			$this->set_error('upload_invalid_dimensions');

 			return FALSE;

@@ -253,9 +253,9 @@
 		 * we'll use move_uploaded_file().  One of the two should

 		 * reliably work in most environments

 		 */

-		if (! @copy($this->file_temp, $this->upload_path.$this->file_name))

+		if ( ! @copy($this->file_temp, $this->upload_path.$this->file_name))

 		{

-			if (! @move_uploaded_file($this->file_temp, $this->upload_path.$this->file_name))

+			if ( ! @move_uploaded_file($this->file_temp, $this->upload_path.$this->file_name))

 			{

 				 $this->set_error('upload_destination_error');

 				 return FALSE;

@@ -350,7 +350,7 @@
 			$filename = md5(uniqid(mt_rand())).$this->file_ext; 			

 		}

 	

-		if (! file_exists($path.$filename))

+		if ( ! file_exists($path.$filename))

 		{

 			return $filename;

 		}

@@ -360,7 +360,7 @@
 		$new_filename = '';

 		for ($i = 1; $i < 100; $i++)

 		{			

-			if (! file_exists($path.$filename.$i.$this->file_ext))

+			if ( ! file_exists($path.$filename.$i.$this->file_ext))

 			{

 				$new_filename = $filename.$i.$this->file_ext;

 				break;

@@ -389,7 +389,7 @@
 	 */	

 	function set_max_filesize($n)

 	{

-		$this->max_size = (! eregi("^[[:digit:]]+$", $n)) ? 0 : $n;

+		$this->max_size = ( ! eregi("^[[:digit:]]+$", $n)) ? 0 : $n;

 	}

 	

 	// --------------------------------------------------------------------

@@ -403,7 +403,7 @@
 	 */	

 	function set_max_width($n)

 	{

-		$this->max_width = (! eregi("^[[:digit:]]+$", $n)) ? 0 : $n;

+		$this->max_width = ( ! eregi("^[[:digit:]]+$", $n)) ? 0 : $n;

 	}

 	

 	// --------------------------------------------------------------------

@@ -417,7 +417,7 @@
 	 */	

 	function set_max_height($n)

 	{

-		$this->max_height = (! eregi("^[[:digit:]]+$", $n)) ? 0 : $n;

+		$this->max_height = ( ! eregi("^[[:digit:]]+$", $n)) ? 0 : $n;

 	}

 	

 	// --------------------------------------------------------------------

@@ -447,7 +447,7 @@
 	 */	

 	function set_image_properties($path = '')

 	{

-		if (! $this->is_image())

+		if ( ! $this->is_image())

 		{

 			return;

 		}

@@ -460,7 +460,7 @@
 

 				$this->image_width		= $D['0'];

 				$this->image_height		= $D['1'];

-				$this->image_type		= (! isset($types[$D['2']])) ? 'unknown' : $types[$D['2']];

+				$this->image_type		= ( ! isset($types[$D['2']])) ? 'unknown' : $types[$D['2']];

 				$this->image_size_str	= $D['3'];  // string containing height and width

 			}

 		}

@@ -528,7 +528,7 @@
 	 */	

 	function is_allowed_filetype()

 	{

-		if (count($this->allowed_types) == 0 || ! is_array($this->allowed_types))

+		if (count($this->allowed_types) == 0 OR ! is_array($this->allowed_types))

 		{

 			$this->set_error('upload_no_file_types');

 			return FALSE;

@@ -587,7 +587,7 @@
 	 */	

 	function is_allowed_dimensions()

 	{

-		if (! $this->is_image())

+		if ( ! $this->is_image())

 		{

 			return TRUE;

 		}

@@ -636,13 +636,13 @@
 			$this->upload_path = str_replace("\\", "/", realpath($this->upload_path));

 		}

 

-		if (! @is_dir($this->upload_path))

+		if ( ! @is_dir($this->upload_path))

 		{

 			$this->set_error('upload_no_filepath');

 			return FALSE;

 		}

 

-		if (! is_really_writable($this->upload_path))

+		if ( ! is_really_writable($this->upload_path))

 		{

 			$this->set_error('upload_not_writable');

 			return FALSE;

@@ -741,7 +741,7 @@
 			return FALSE;

 		}

 		

-		if (! $fp = @fopen($file, FOPEN_READ_WRITE))

+		if ( ! $fp = @fopen($file, FOPEN_READ_WRITE))

 		{

 			return FALSE;

 		}

@@ -830,7 +830,7 @@
 			}

 		}

 	

-		return (! isset($this->mimes[$mime])) ? FALSE : $this->mimes[$mime];

+		return ( ! isset($this->mimes[$mime])) ? FALSE : $this->mimes[$mime];

 	}

 

 	/**

@@ -875,6 +875,6 @@
 

 }

 // END Upload Class

-
-/* End of file Upload.php */
+

+/* End of file Upload.php */

 /* Location: ./system/libraries/Upload.php */
\ No newline at end of file