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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* pschwartau@netscape.com
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
/*
* Date: 14 Mar 2001
*
* SUMMARY: Utility functions for testing objects -
*
* Suppose obj is an instance of a native type, e.g. Number.
* Then obj.toString() invokes Number.prototype.toString().
* We would also like to access Object.prototype.toString().
*
* The difference is this: suppose obj = new Number(7).
* Invoking Number.prototype.toString() on this just returns 7.
* Object.prototype.toString() on this returns '[object Number]'.
*
* The getJSType() function below will return '[object Number]' for us.
* The getJSClass() function returns 'Number', the [[Class]] property of obj.
* See ECMA-262 Edition 3, 13-Oct-1999, Section 8.6.2
*/
//-----------------------------------------------------------------------------
gTestsubsuite = 'Object';
var cnNoObject = 'Unexpected Error!!! Parameter to this function must be an object';
var cnNoClass = 'Unexpected Error!!! Cannot find Class property';
var cnObjectToString = Object.prototype.toString;
var GLOBAL = 'global';
// checks that it's safe to call findType()
function getJSType(obj)
{
if (isObject(obj))
return findType(obj);
return cnNoObject;
}
// checks that it's safe to call findType()
function getJSClass(obj)
{
if (isObject(obj))
return findClass(findType(obj));
return cnNoObject;
}
function findType(obj)
{
return cnObjectToString.apply(obj);
}
// given '[object Number]', return 'Number'
function findClass(sType)
{
var re = /^\[.*\s+(\w+)\s*\]$/;
var a = sType.match(re);
if (a && a[1])
return a[1];
return cnNoClass;
}
function isObject(obj)
{
return obj instanceof Object;
}
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