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Diffstat (limited to 'trunk/infrastructure/rhino1_7R1/src/org/mozilla/javascript/NativeNumber.java')
| -rw-r--r-- | trunk/infrastructure/rhino1_7R1/src/org/mozilla/javascript/NativeNumber.java | 244 |
1 files changed, 244 insertions, 0 deletions
diff --git a/trunk/infrastructure/rhino1_7R1/src/org/mozilla/javascript/NativeNumber.java b/trunk/infrastructure/rhino1_7R1/src/org/mozilla/javascript/NativeNumber.java new file mode 100644 index 0000000..8fc9fb0 --- /dev/null +++ b/trunk/infrastructure/rhino1_7R1/src/org/mozilla/javascript/NativeNumber.java @@ -0,0 +1,244 @@ +/* -*- 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 = 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: 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; +} |