/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- * * The contents of this file are subject to the Netscape 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/NPL/ * * 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 Netscape are * Copyright (C) 1997-1999 Netscape Communications Corporation. 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 Public License (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 NPL, indicate your decision by * deleting the provisions above and replace 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 NPL or the GPL. */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 = new Object();    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);    }    private NativeNumber(double number)    {        doubleValue = number;    }    public String getClassName()    {        return "Number";    }    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);    }    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);    }    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:            return num_to(value, args, DToA.DTOSTR_STANDARD_EXPONENTIAL,                          DToA.DTOSTR_EXPONENTIAL, 0, 1);          case Id_toPrecision:            return num_to(value, args, DToA.DTOSTR_STANDARD,                          DToA.DTOSTR_PRECISION, 1, 0);          default: throw new IllegalArgumentException(String.valueOf(id));        }    }    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#    protected int findPrototypeId(String s)    {        int id;// #generated# Last update: 2004-03-17 13:41:35 CET        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;        }// #/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;}