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Operations.cs
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Operations.cs
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//
// Operations.cs
//
// Authors:
// Marek Safar <marek.safar@gmail.com>
//
// Copyright (C) 2013 Xamarin, Inc (http://www.xamarin.com)
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
using System;
namespace PlayScript.Runtime
{
public static class Operations
{
public static bool Comparison (BinaryOperator binaryOperator, object left, object right)
{
if (right is int)
return Comparison (binaryOperator, left, (int) right);
if (right is string)
return Comparison (binaryOperator, left, (string) right);
// TODO: uint, string, double, etc
return false;
}
public static bool Comparison (BinaryOperator binaryOperator, object left, int right)
{
if (left is int) {
var l = (int) left;
switch (binaryOperator) {
case BinaryOperator.Equality:
case BinaryOperator.StrictEquality:
return l == right;
case BinaryOperator.Inequality:
return l != right;
case BinaryOperator.GreaterThan:
return l > right;
case BinaryOperator.GreaterThanOrEqual:
return l >= right;
case BinaryOperator.LessThan:
return l < right;
case BinaryOperator.LessThanOrEqual:
return l <= right;
default:
throw new NotImplementedException (binaryOperator.ToString ());
}
}
if ((binaryOperator & BinaryOperator.StrictMask) != 0)
return binaryOperator == BinaryOperator.StrictInequality;
// TODO: uint, string, double, etc
return false;
}
public static bool Comparison (BinaryOperator binaryOperator, int left, object right)
{
if (right is int) {
var r = (int) right;
switch (binaryOperator) {
case BinaryOperator.Equality:
case BinaryOperator.StrictEquality:
return left == r;
case BinaryOperator.Inequality:
case BinaryOperator.StrictInequality:
return left != r;
case BinaryOperator.GreaterThan:
return left > r;
case BinaryOperator.GreaterThanOrEqual:
return left >= r;
case BinaryOperator.LessThan:
return left < r;
case BinaryOperator.LessThanOrEqual:
return left <= r;
default:
throw new NotImplementedException (binaryOperator.ToString ());
}
}
if ((binaryOperator & BinaryOperator.StrictMask) != 0)
return binaryOperator == BinaryOperator.StrictInequality;
// TODO: uint, string, double, etc
return false;
}
public static bool Comparison (BinaryOperator binaryOperator, object left, string right)
{
if (right is string) {
var l = (string) left;
switch (binaryOperator) {
case BinaryOperator.Equality:
case BinaryOperator.StrictEquality:
return l == right;
case BinaryOperator.Inequality:
case BinaryOperator.StrictInequality:
return l != right;
/* TODO: rules base on char comparison but how does it work with unicode
case BinaryOperator.GreaterThan:
return l > right;
case BinaryOperator.GreaterThanOrEqual:
return l >= right;
case BinaryOperator.LessThan:
return l < right;
case BinaryOperator.LessThanOrEqual:
return l <= right;
default:
throw new NotImplementedException (binaryOperator.ToString ());
*/
}
}
if ((binaryOperator & BinaryOperator.StrictMask) != 0)
return binaryOperator == BinaryOperator.StrictInequality;
// TODO: uint, string, double, etc
return false;
}
public static Type ClassOf (object instance)
{
var type = instance as Type;
if (type == null)
throw new _root.TypeError (_root.Error.getErrorMessage (1007), 1007);
return type;
}
public static string TypeOf (object instance)
{
if (instance == null)
return "object";
if (instance is string)
return "string";
if (instance is int || instance is uint || instance is double)
return "number";
if (instance is bool)
return "boolean";
// TODO: Wrong, it has to be of a special type
if (instance == Undefined.Value)
return "undefined";
// TODO: Wrong, it has to be of a special type
if (instance is _root.XML || instance is _root.XMLList)
return "xml";
if (instance is Delegate)
return "function";
return "object";
}
}
}