// ===========================================================================
// Copyright 2018 Autodesk, Inc. All rights reserved.
//
// Use of this software is subject to the terms of the Autodesk license
// agreement provided at the time of installation or download, or which
// otherwise accompanies this software in either electronic or hard copy form.
// ===========================================================================
//
//
//  Creation Date:  11.Apr.03
//
//<doc>
//<name fileExtension>
//
//<synopsis>
//		string fileExtension(string $file)
//
//<description>
//		Return the file extension.
//
//<flags>
//		string $file	A file that may contain a file extension.
//
//<returns>
//		string : The file extension.
//
//<examples>
//	fileExtension("file.txt");
//	// Result: txt //
//
//	fileExtension("c:/Images/image.bmp");
//	// Result: bmp //
//
//	fileExtension("/usr/images/picture.jpg");
//	// Result: jpg //
//
//	fileExtension("c:\Documents\Pictures\me.jpg");
//	// Result: jpg //
//
//	fileExtension("frame.012.tif");
//	// Result: tif //
//
//</doc>
//
global proc string fileExtension(string $file)
{
	string $result = "";

	if ("" == $file) return $result;

    string $buffer[];
	int $count;
	$count = `tokenize $file "." $buffer`;
	if ($count > 1) {
		$result = ($buffer[$count - 1]);
	}

	return $result;
}