/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0
*
* 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 Rhino code, released
* May 6, 1999.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1997-1999
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Norris Boyd
* Igor Bukanov
* Mike McCabe
*
* Alternatively, the contents of this file may be used under the terms of
* the GNU General Public License Version 2 or later (the "GPL"), in which
* case the provisions of the GPL are applicable instead of those above. If
* you wish to allow use of your version of this file only under the terms of
* the GPL and not to allow others to use your version of this file under the
* MPL, indicate your decision by deleting the provisions above and replacing
* them with the notice and other provisions required by the GPL. If you do
* not delete the provisions above, a recipient may use your version of this
* file under either the MPL or the GPL.
*
* ***** END LICENSE BLOCK ***** */
package org.mozilla.javascript;
/**
* This class implements the Number native object.
*
* See ECMA 15.7.
*
* @author Norris Boyd
*/
final class NativeNumber extends IdScriptableObject
{
static final long serialVersionUID = 3504516769741512101L;
private static final Object NUMBER_TAG = "Number";
private static final int MAX_PRECISION = 100;
static void init(Scriptable scope, boolean sealed)
{
NativeNumber obj = new NativeNumber(0.0);
obj.exportAsJSClass(MAX_PROTOTYPE_ID, scope, sealed);
}
NativeNumber(double number)
{
doubleValue = number;
}
@Override
public String getClassName()
{
return "Number";
}
@Override
protected void fillConstructorProperties(IdFunctionObject ctor)
{
final int attr = ScriptableObject.DONTENUM |
ScriptableObject.PERMANENT |
ScriptableObject.READONLY;
ctor.defineProperty("NaN", ScriptRuntime.NaNobj, attr);
ctor.defineProperty("POSITIVE_INFINITY",
ScriptRuntime.wrapNumber(Double.POSITIVE_INFINITY),
attr);
ctor.defineProperty("NEGATIVE_INFINITY",
ScriptRuntime.wrapNumber(Double.NEGATIVE_INFINITY),
attr);
ctor.defineProperty("MAX_VALUE",
ScriptRuntime.wrapNumber(Double.MAX_VALUE),
attr);
ctor.defineProperty("MIN_VALUE",
ScriptRuntime.wrapNumber(Double.MIN_VALUE),
attr);
super.fillConstructorProperties(ctor);
}
@Override
protected void initPrototypeId(int id)
{
String s;
int arity;
switch (id) {
case Id_constructor: arity=1; s="constructor"; break;
case Id_toString: arity=1; s="toString"; break;
case Id_toLocaleString: arity=1; s="toLocaleString"; break;
case Id_toSource: arity=0; s="toSource"; break;
case Id_valueOf: arity=0; s="valueOf"; break;
case Id_toFixed: arity=1; s="toFixed"; break;
case Id_toExponential: arity=1; s="toExponential"; break;
case Id_toPrecision: arity=1; s="toPrecision"; break;
default: throw new IllegalArgumentException(String.valueOf(id));
}
initPrototypeMethod(NUMBER_TAG, id, s, arity);
}
@Override
public Object execIdCall(IdFunctionObject f, Context cx, Scriptable scope,
Scriptable thisObj, Object[] args)
{
if (!f.hasTag(NUMBER_TAG)) {
return super.execIdCall(f, cx, scope, thisObj, args);
}
int id = f.methodId();
if (id == Id_constructor) {
double val = (args.length >= 1)
? ScriptRuntime.toNumber(args[0]) : 0.0;
if (thisObj == null) {
// new Number(val) creates a new Number object.
return new NativeNumber(val);
}
// Number(val) converts val to a number value.
return ScriptRuntime.wrapNumber(val);
}
// The rest of Number.prototype methods require thisObj to be Number
if (!(thisObj instanceof NativeNumber))
throw incompatibleCallError(f);
double value = ((NativeNumber)thisObj).doubleValue;
switch (id) {
case Id_toString:
case Id_toLocaleString:
{
// toLocaleString is just an alias for toString for now
int base = (args.length == 0)
? 10 : ScriptRuntime.toInt32(args[0]);
return ScriptRuntime.numberToString(value, base);
}
case Id_toSource:
return "(new Number("+ScriptRuntime.toString(value)+"))";
case Id_valueOf:
return ScriptRuntime.wrapNumber(value);
case Id_toFixed:
return num_to(value, args, DToA.DTOSTR_FIXED,
DToA.DTOSTR_FIXED, -20, 0);
case Id_toExponential: {
// Handle special values before range check
if(Double.isNaN(value)) {
return "NaN";
}
if(Double.isInfinite(value)) {
if(value >= 0) {
return "Infinity";
}
else {
return "-Infinity";
}
}
// General case
return num_to(value, args, DToA.DTOSTR_STANDARD_EXPONENTIAL,
DToA.DTOSTR_EXPONENTIAL, 0, 1);
}
case Id_toPrecision: {
// Undefined precision, fall back to ToString()
if(args.length == 0 || args[0] == Undefined.instance) {
return ScriptRuntime.numberToString(value, 10);
}
// Handle special values before range check
if(Double.isNaN(value)) {
return "NaN";
}
if(Double.isInfinite(value)) {
if(value >= 0) {
return "Infinity";
}
else {
return "-Infinity";
}
}
return num_to(value, args, DToA.DTOSTR_STANDARD,
DToA.DTOSTR_PRECISION, 1, 0);
}
default: throw new IllegalArgumentException(String.valueOf(id));
}
}
@Override
public String toString() {
return ScriptRuntime.numberToString(doubleValue, 10);
}
private static String num_to(double val,
Object[] args,
int zeroArgMode, int oneArgMode,
int precisionMin, int precisionOffset)
{
int precision;
if (args.length == 0) {
precision = 0;
oneArgMode = zeroArgMode;
} else {
/* We allow a larger range of precision than
ECMA requires; this is permitted by ECMA. */
precision = ScriptRuntime.toInt32(args[0]);
if (precision < precisionMin || precision > MAX_PRECISION) {
String msg = ScriptRuntime.getMessage1(
"msg.bad.precision", ScriptRuntime.toString(args[0]));
throw ScriptRuntime.constructError("RangeError", msg);
}
}
StringBuffer sb = new StringBuffer();
DToA.JS_dtostr(sb, oneArgMode, precision + precisionOffset, val);
return sb.toString();
}
// #string_id_map#
@Override
protected int findPrototypeId(String s)
{
int id;
// #generated# Last update: 2007-05-09 08:15:50 EDT
L0: { id = 0; String X = null; int c;
L: switch (s.length()) {
case 7: c=s.charAt(0);
if (c=='t') { X="toFixed";id=Id_toFixed; }
else if (c=='v') { X="valueOf";id=Id_valueOf; }
break L;
case 8: c=s.charAt(3);
if (c=='o') { X="toSource";id=Id_toSource; }
else if (c=='t') { X="toString";id=Id_toString; }
break L;
case 11: c=s.charAt(0);
if (c=='c') { X="constructor";id=Id_constructor; }
else if (c=='t') { X="toPrecision";id=Id_toPrecision; }
break L;
case 13: X="toExponential";id=Id_toExponential; break L;
case 14: X="toLocaleString";id=Id_toLocaleString; break L;
}
if (X!=null && X!=s && !X.equals(s)) id = 0;
break L0;
}
// #/generated#
return id;
}
private static final int
Id_constructor = 1,
Id_toString = 2,
Id_toLocaleString = 3,
Id_toSource = 4,
Id_valueOf = 5,
Id_toFixed = 6,
Id_toExponential = 7,
Id_toPrecision = 8,
MAX_PROTOTYPE_ID = 8;
// #/string_id_map#
private double doubleValue;
}