1746 lines
62 KiB
Java
1746 lines
62 KiB
Java
/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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*
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* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Rhino code, released
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* May 6, 1999.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1997-1999
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Norris Boyd
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* Mike McCabe
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* Igor Bukanov
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*
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* Alternatively, the contents of this file may be used under the terms of
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* the GNU General Public License Version 2 or later (the "GPL"), in which
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* case the provisions of the GPL are applicable instead of those above. If
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* you wish to allow use of your version of this file only under the terms of
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* the GPL and not to allow others to use your version of this file under the
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* MPL, indicate your decision by deleting the provisions above and replacing
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* them with the notice and other provisions required by the GPL. If you do
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* not delete the provisions above, a recipient may use your version of this
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* file under either the MPL or the GPL.
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*
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* ***** END LICENSE BLOCK ***** */
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package org.mozilla.javascript;
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import java.util.Arrays;
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/**
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* This class implements the Array native object.
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* @author Norris Boyd
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* @author Mike McCabe
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*/
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public class NativeArray extends IdScriptableObject
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{
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static final long serialVersionUID = 7331366857676127338L;
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/*
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* Optimization possibilities and open issues:
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* - Long vs. double schizophrenia. I suspect it might be better
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* to use double throughout.
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*
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* - Functions that need a new Array call "new Array" in the
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* current scope rather than using a hardwired constructor;
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* "Array" could be redefined. It turns out that js calls the
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* equivalent of "new Array" in the current scope, except that it
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* always gets at least an object back, even when Array == null.
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*/
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private static final Object ARRAY_TAG = "Array";
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private static final Integer NEGATIVE_ONE = new Integer(-1);
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static void init(Scriptable scope, boolean sealed)
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{
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NativeArray obj = new NativeArray(0);
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obj.exportAsJSClass(MAX_PROTOTYPE_ID, scope, sealed);
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}
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static int getMaximumInitialCapacity() {
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return maximumInitialCapacity;
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}
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static void setMaximumInitialCapacity(int maximumInitialCapacity) {
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NativeArray.maximumInitialCapacity = maximumInitialCapacity;
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}
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public NativeArray(long lengthArg)
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{
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denseOnly = lengthArg <= maximumInitialCapacity;
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if (denseOnly) {
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int intLength = (int) lengthArg;
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if (intLength < DEFAULT_INITIAL_CAPACITY)
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intLength = DEFAULT_INITIAL_CAPACITY;
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dense = new Object[intLength];
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Arrays.fill(dense, Scriptable.NOT_FOUND);
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}
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length = lengthArg;
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}
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public NativeArray(Object[] array)
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{
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denseOnly = true;
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dense = array;
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length = array.length;
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}
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@Override
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public String getClassName()
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{
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return "Array";
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}
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private static final int
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Id_length = 1,
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MAX_INSTANCE_ID = 1;
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@Override
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protected int getMaxInstanceId()
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{
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return MAX_INSTANCE_ID;
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}
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@Override
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protected int findInstanceIdInfo(String s)
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{
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if (s.equals("length")) {
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return instanceIdInfo(DONTENUM | PERMANENT, Id_length);
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}
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return super.findInstanceIdInfo(s);
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}
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@Override
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protected String getInstanceIdName(int id)
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{
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if (id == Id_length) { return "length"; }
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return super.getInstanceIdName(id);
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}
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@Override
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protected Object getInstanceIdValue(int id)
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{
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if (id == Id_length) {
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return ScriptRuntime.wrapNumber(length);
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}
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return super.getInstanceIdValue(id);
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}
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@Override
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protected void setInstanceIdValue(int id, Object value)
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{
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if (id == Id_length) {
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setLength(value); return;
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}
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super.setInstanceIdValue(id, value);
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}
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@Override
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protected void fillConstructorProperties(IdFunctionObject ctor)
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{
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addIdFunctionProperty(ctor, ARRAY_TAG, ConstructorId_join,
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"join", 2);
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addIdFunctionProperty(ctor, ARRAY_TAG, ConstructorId_reverse,
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"reverse", 1);
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addIdFunctionProperty(ctor, ARRAY_TAG, ConstructorId_sort,
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"sort", 2);
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addIdFunctionProperty(ctor, ARRAY_TAG, ConstructorId_push,
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"push", 2);
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addIdFunctionProperty(ctor, ARRAY_TAG, ConstructorId_pop,
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"pop", 2);
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addIdFunctionProperty(ctor, ARRAY_TAG, ConstructorId_shift,
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"shift", 2);
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addIdFunctionProperty(ctor, ARRAY_TAG, ConstructorId_unshift,
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"unshift", 2);
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addIdFunctionProperty(ctor, ARRAY_TAG, ConstructorId_splice,
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"splice", 2);
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addIdFunctionProperty(ctor, ARRAY_TAG, ConstructorId_concat,
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"concat", 2);
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addIdFunctionProperty(ctor, ARRAY_TAG, ConstructorId_slice,
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"slice", 2);
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addIdFunctionProperty(ctor, ARRAY_TAG, ConstructorId_indexOf,
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"indexOf", 2);
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addIdFunctionProperty(ctor, ARRAY_TAG, ConstructorId_lastIndexOf,
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"lastIndexOf", 2);
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addIdFunctionProperty(ctor, ARRAY_TAG, ConstructorId_every,
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"every", 2);
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addIdFunctionProperty(ctor, ARRAY_TAG, ConstructorId_filter,
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"filter", 2);
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addIdFunctionProperty(ctor, ARRAY_TAG, ConstructorId_forEach,
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"forEach", 2);
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addIdFunctionProperty(ctor, ARRAY_TAG, ConstructorId_map,
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"map", 2);
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addIdFunctionProperty(ctor, ARRAY_TAG, ConstructorId_some,
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"some", 2);
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super.fillConstructorProperties(ctor);
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}
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@Override
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protected void initPrototypeId(int id)
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{
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String s;
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int arity;
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switch (id) {
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case Id_constructor: arity=1; s="constructor"; break;
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case Id_toString: arity=0; s="toString"; break;
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case Id_toLocaleString: arity=1; s="toLocaleString"; break;
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case Id_toSource: arity=0; s="toSource"; break;
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case Id_join: arity=1; s="join"; break;
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case Id_reverse: arity=0; s="reverse"; break;
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case Id_sort: arity=1; s="sort"; break;
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case Id_push: arity=1; s="push"; break;
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case Id_pop: arity=1; s="pop"; break;
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case Id_shift: arity=1; s="shift"; break;
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case Id_unshift: arity=1; s="unshift"; break;
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case Id_splice: arity=1; s="splice"; break;
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case Id_concat: arity=1; s="concat"; break;
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case Id_slice: arity=1; s="slice"; break;
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case Id_indexOf: arity=1; s="indexOf"; break;
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case Id_lastIndexOf: arity=1; s="lastIndexOf"; break;
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case Id_every: arity=1; s="every"; break;
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case Id_filter: arity=1; s="filter"; break;
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case Id_forEach: arity=1; s="forEach"; break;
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case Id_map: arity=1; s="map"; break;
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case Id_some: arity=1; s="some"; break;
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default: throw new IllegalArgumentException(String.valueOf(id));
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}
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initPrototypeMethod(ARRAY_TAG, id, s, arity);
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}
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@Override
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public Object execIdCall(IdFunctionObject f, Context cx, Scriptable scope,
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Scriptable thisObj, Object[] args)
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{
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if (!f.hasTag(ARRAY_TAG)) {
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return super.execIdCall(f, cx, scope, thisObj, args);
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}
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int id = f.methodId();
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again:
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for (;;) {
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switch (id) {
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case ConstructorId_join:
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case ConstructorId_reverse:
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case ConstructorId_sort:
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case ConstructorId_push:
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case ConstructorId_pop:
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case ConstructorId_shift:
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case ConstructorId_unshift:
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case ConstructorId_splice:
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case ConstructorId_concat:
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case ConstructorId_slice:
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case ConstructorId_indexOf:
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case ConstructorId_lastIndexOf:
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case ConstructorId_every:
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case ConstructorId_filter:
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case ConstructorId_forEach:
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case ConstructorId_map:
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case ConstructorId_some: {
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thisObj = ScriptRuntime.toObject(scope, args[0]);
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Object[] newArgs = new Object[args.length-1];
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for (int i=0; i < newArgs.length; i++)
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newArgs[i] = args[i+1];
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args = newArgs;
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id = -id;
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continue again;
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}
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case Id_constructor: {
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boolean inNewExpr = (thisObj == null);
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if (!inNewExpr) {
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// IdFunctionObject.construct will set up parent, proto
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return f.construct(cx, scope, args);
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}
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return jsConstructor(cx, scope, args);
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}
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case Id_toString:
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return toStringHelper(cx, scope, thisObj,
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cx.hasFeature(Context.FEATURE_TO_STRING_AS_SOURCE), false);
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case Id_toLocaleString:
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return toStringHelper(cx, scope, thisObj, false, true);
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case Id_toSource:
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return toStringHelper(cx, scope, thisObj, true, false);
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case Id_join:
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return js_join(cx, thisObj, args);
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case Id_reverse:
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return js_reverse(cx, thisObj, args);
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case Id_sort:
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return js_sort(cx, scope, thisObj, args);
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case Id_push:
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return js_push(cx, thisObj, args);
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case Id_pop:
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return js_pop(cx, thisObj, args);
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case Id_shift:
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return js_shift(cx, thisObj, args);
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case Id_unshift:
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return js_unshift(cx, thisObj, args);
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case Id_splice:
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return js_splice(cx, scope, thisObj, args);
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case Id_concat:
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return js_concat(cx, scope, thisObj, args);
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case Id_slice:
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return js_slice(cx, thisObj, args);
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case Id_indexOf:
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return indexOfHelper(cx, thisObj, args, false);
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case Id_lastIndexOf:
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return indexOfHelper(cx, thisObj, args, true);
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case Id_every:
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case Id_filter:
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case Id_forEach:
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case Id_map:
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case Id_some:
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return iterativeMethod(cx, id, scope, thisObj, args);
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}
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throw new IllegalArgumentException(String.valueOf(id));
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}
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}
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@Override
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public Object get(int index, Scriptable start)
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{
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if (!denseOnly && isGetterOrSetter(null, index, false))
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return super.get(index, start);
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if (dense != null && 0 <= index && index < dense.length)
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return dense[index];
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return super.get(index, start);
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}
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@Override
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public boolean has(int index, Scriptable start)
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{
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if (!denseOnly && isGetterOrSetter(null, index, false))
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return super.has(index, start);
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if (dense != null && 0 <= index && index < dense.length)
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return dense[index] != NOT_FOUND;
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return super.has(index, start);
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}
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// if id is an array index (ECMA 15.4.0), return the number,
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// otherwise return -1L
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private static long toArrayIndex(String id)
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{
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double d = ScriptRuntime.toNumber(id);
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if (d == d) {
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long index = ScriptRuntime.toUint32(d);
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if (index == d && index != 4294967295L) {
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// Assume that ScriptRuntime.toString(index) is the same
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// as java.lang.Long.toString(index) for long
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if (Long.toString(index).equals(id)) {
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return index;
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}
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}
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}
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return -1;
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}
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@Override
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public void put(String id, Scriptable start, Object value)
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{
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super.put(id, start, value);
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if (start == this) {
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// If the object is sealed, super will throw exception
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long index = toArrayIndex(id);
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if (index >= length) {
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length = index + 1;
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denseOnly = false;
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}
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}
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}
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private boolean ensureCapacity(int capacity)
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{
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if (capacity > dense.length) {
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if (capacity > MAX_PRE_GROW_SIZE) {
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denseOnly = false;
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return false;
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}
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capacity = Math.max(capacity, (int)(dense.length * GROW_FACTOR));
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Object[] newDense = new Object[capacity];
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System.arraycopy(dense, 0, newDense, 0, dense.length);
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Arrays.fill(newDense, dense.length, newDense.length,
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Scriptable.NOT_FOUND);
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dense = newDense;
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}
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return true;
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}
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@Override
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public void put(int index, Scriptable start, Object value)
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{
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if (start == this && !isSealed() && dense != null && 0 <= index &&
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(denseOnly || !isGetterOrSetter(null, index, true)))
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{
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if (index < dense.length) {
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dense[index] = value;
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if (this.length <= index)
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this.length = (long)index + 1;
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return;
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} else if (denseOnly && index < dense.length * GROW_FACTOR &&
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ensureCapacity(index+1))
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{
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dense[index] = value;
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this.length = (long)index + 1;
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return;
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} else {
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denseOnly = false;
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}
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}
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super.put(index, start, value);
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if (start == this) {
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// only set the array length if given an array index (ECMA 15.4.0)
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if (this.length <= index) {
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// avoid overflowing index!
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this.length = (long)index + 1;
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}
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}
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}
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@Override
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public void delete(int index)
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{
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if (dense != null && 0 <= index && index < dense.length &&
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!isSealed() && (denseOnly || !isGetterOrSetter(null, index, true)))
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{
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dense[index] = NOT_FOUND;
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} else {
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super.delete(index);
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}
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}
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@Override
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public Object[] getIds()
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{
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Object[] superIds = super.getIds();
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if (dense == null) { return superIds; }
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int N = dense.length;
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long currentLength = length;
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if (N > currentLength) {
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N = (int)currentLength;
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}
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if (N == 0) { return superIds; }
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int superLength = superIds.length;
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Object[] ids = new Object[N + superLength];
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int presentCount = 0;
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for (int i = 0; i != N; ++i) {
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// Replace existing elements by their indexes
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if (dense[i] != NOT_FOUND) {
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ids[presentCount] = new Integer(i);
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++presentCount;
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}
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}
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if (presentCount != N) {
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// dense contains deleted elems, need to shrink the result
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Object[] tmp = new Object[presentCount + superLength];
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System.arraycopy(ids, 0, tmp, 0, presentCount);
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ids = tmp;
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}
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System.arraycopy(superIds, 0, ids, presentCount, superLength);
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return ids;
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}
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@Override
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public Object getDefaultValue(Class<?> hint)
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{
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if (hint == ScriptRuntime.NumberClass) {
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Context cx = Context.getContext();
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if (cx.getLanguageVersion() == Context.VERSION_1_2)
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return new Long(length);
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}
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return super.getDefaultValue(hint);
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}
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/**
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* See ECMA 15.4.1,2
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*/
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private static Object jsConstructor(Context cx, Scriptable scope,
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Object[] args)
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{
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if (args.length == 0)
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return new NativeArray(0);
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|
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// Only use 1 arg as first element for version 1.2; for
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// any other version (including 1.3) follow ECMA and use it as
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// a length.
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if (cx.getLanguageVersion() == Context.VERSION_1_2) {
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return new NativeArray(args);
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} else {
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Object arg0 = args[0];
|
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if (args.length > 1 || !(arg0 instanceof Number)) {
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return new NativeArray(args);
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} else {
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long len = ScriptRuntime.toUint32(arg0);
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if (len != ((Number)arg0).doubleValue())
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throw Context.reportRuntimeError0("msg.arraylength.bad");
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return new NativeArray(len);
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}
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}
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}
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public long getLength() {
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return length;
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}
|
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|
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/** @deprecated Use {@link #getLength()} instead. */
|
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public long jsGet_length() {
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return getLength();
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}
|
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|
|
/**
|
|
* Change the value of the internal flag that determines whether all
|
|
* storage is handed by a dense backing array rather than an associative
|
|
* store.
|
|
* @param denseOnly new value for denseOnly flag
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|
* @throws IllegalArgumentException if an attempt is made to enable
|
|
* denseOnly after it was disabled; NativeArray code is not written
|
|
* to handle switching back to a dense representation
|
|
*/
|
|
void setDenseOnly(boolean denseOnly) {
|
|
if (denseOnly && !this.denseOnly)
|
|
throw new IllegalArgumentException();
|
|
this.denseOnly = denseOnly;
|
|
}
|
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|
|
private void setLength(Object val) {
|
|
/* XXX do we satisfy this?
|
|
* 15.4.5.1 [[Put]](P, V):
|
|
* 1. Call the [[CanPut]] method of A with name P.
|
|
* 2. If Result(1) is false, return.
|
|
* ?
|
|
*/
|
|
|
|
double d = ScriptRuntime.toNumber(val);
|
|
long longVal = ScriptRuntime.toUint32(d);
|
|
if (longVal != d)
|
|
throw Context.reportRuntimeError0("msg.arraylength.bad");
|
|
|
|
if (denseOnly) {
|
|
if (longVal < length) {
|
|
// downcast okay because denseOnly
|
|
Arrays.fill(dense, (int) longVal, dense.length, NOT_FOUND);
|
|
length = longVal;
|
|
return;
|
|
} else if (longVal < MAX_PRE_GROW_SIZE &&
|
|
longVal < (length * GROW_FACTOR) &&
|
|
ensureCapacity((int)longVal))
|
|
{
|
|
length = longVal;
|
|
return;
|
|
} else {
|
|
denseOnly = false;
|
|
}
|
|
}
|
|
if (longVal < length) {
|
|
// remove all properties between longVal and length
|
|
if (length - longVal > 0x1000) {
|
|
// assume that the representation is sparse
|
|
Object[] e = getIds(); // will only find in object itself
|
|
for (int i=0; i < e.length; i++) {
|
|
Object id = e[i];
|
|
if (id instanceof String) {
|
|
// > MAXINT will appear as string
|
|
String strId = (String)id;
|
|
long index = toArrayIndex(strId);
|
|
if (index >= longVal)
|
|
delete(strId);
|
|
} else {
|
|
int index = ((Integer)id).intValue();
|
|
if (index >= longVal)
|
|
delete(index);
|
|
}
|
|
}
|
|
} else {
|
|
// assume a dense representation
|
|
for (long i = longVal; i < length; i++) {
|
|
deleteElem(this, i);
|
|
}
|
|
}
|
|
}
|
|
length = longVal;
|
|
}
|
|
|
|
/* Support for generic Array-ish objects. Most of the Array
|
|
* functions try to be generic; anything that has a length
|
|
* property is assumed to be an array.
|
|
* getLengthProperty returns 0 if obj does not have the length property
|
|
* or its value is not convertible to a number.
|
|
*/
|
|
static long getLengthProperty(Context cx, Scriptable obj) {
|
|
// These will both give numeric lengths within Uint32 range.
|
|
if (obj instanceof NativeString) {
|
|
return ((NativeString)obj).getLength();
|
|
} else if (obj instanceof NativeArray) {
|
|
return ((NativeArray)obj).getLength();
|
|
}
|
|
return ScriptRuntime.toUint32(
|
|
ScriptRuntime.getObjectProp(obj, "length", cx));
|
|
}
|
|
|
|
private static Object setLengthProperty(Context cx, Scriptable target,
|
|
long length)
|
|
{
|
|
return ScriptRuntime.setObjectProp(
|
|
target, "length", ScriptRuntime.wrapNumber(length), cx);
|
|
}
|
|
|
|
/* Utility functions to encapsulate index > Integer.MAX_VALUE
|
|
* handling. Also avoids unnecessary object creation that would
|
|
* be necessary to use the general ScriptRuntime.get/setElem
|
|
* functions... though this is probably premature optimization.
|
|
*/
|
|
private static void deleteElem(Scriptable target, long index) {
|
|
int i = (int)index;
|
|
if (i == index) { target.delete(i); }
|
|
else { target.delete(Long.toString(index)); }
|
|
}
|
|
|
|
private static Object getElem(Context cx, Scriptable target, long index)
|
|
{
|
|
if (index > Integer.MAX_VALUE) {
|
|
String id = Long.toString(index);
|
|
return ScriptRuntime.getObjectProp(target, id, cx);
|
|
} else {
|
|
return ScriptRuntime.getObjectIndex(target, (int)index, cx);
|
|
}
|
|
}
|
|
|
|
private static void setElem(Context cx, Scriptable target, long index,
|
|
Object value)
|
|
{
|
|
if (index > Integer.MAX_VALUE) {
|
|
String id = Long.toString(index);
|
|
ScriptRuntime.setObjectProp(target, id, value, cx);
|
|
} else {
|
|
ScriptRuntime.setObjectIndex(target, (int)index, value, cx);
|
|
}
|
|
}
|
|
|
|
private static String toStringHelper(Context cx, Scriptable scope,
|
|
Scriptable thisObj,
|
|
boolean toSource, boolean toLocale)
|
|
{
|
|
/* It's probably redundant to handle long lengths in this
|
|
* function; StringBuilders are limited to 2^31 in java.
|
|
*/
|
|
|
|
long length = getLengthProperty(cx, thisObj);
|
|
|
|
StringBuilder result = new StringBuilder(256);
|
|
|
|
// whether to return '4,unquoted,5' or '[4, "quoted", 5]'
|
|
String separator;
|
|
|
|
if (toSource) {
|
|
result.append('[');
|
|
separator = ", ";
|
|
} else {
|
|
separator = ",";
|
|
}
|
|
|
|
boolean haslast = false;
|
|
long i = 0;
|
|
|
|
boolean toplevel, iterating;
|
|
if (cx.iterating == null) {
|
|
toplevel = true;
|
|
iterating = false;
|
|
cx.iterating = new ObjToIntMap(31);
|
|
} else {
|
|
toplevel = false;
|
|
iterating = cx.iterating.has(thisObj);
|
|
}
|
|
|
|
// Make sure cx.iterating is set to null when done
|
|
// so we don't leak memory
|
|
try {
|
|
if (!iterating) {
|
|
cx.iterating.put(thisObj, 0); // stop recursion.
|
|
for (i = 0; i < length; i++) {
|
|
if (i > 0) result.append(separator);
|
|
Object elem = getElem(cx, thisObj, i);
|
|
if (elem == null || elem == Undefined.instance) {
|
|
haslast = false;
|
|
continue;
|
|
}
|
|
haslast = true;
|
|
|
|
if (toSource) {
|
|
result.append(ScriptRuntime.uneval(cx, scope, elem));
|
|
|
|
} else if (elem instanceof String) {
|
|
String s = (String)elem;
|
|
if (toSource) {
|
|
result.append('\"');
|
|
result.append(ScriptRuntime.escapeString(s));
|
|
result.append('\"');
|
|
} else {
|
|
result.append(s);
|
|
}
|
|
|
|
} else {
|
|
if (toLocale)
|
|
{
|
|
Callable fun;
|
|
Scriptable funThis;
|
|
fun = ScriptRuntime.getPropFunctionAndThis(
|
|
elem, "toLocaleString", cx);
|
|
funThis = ScriptRuntime.lastStoredScriptable(cx);
|
|
elem = fun.call(cx, scope, funThis,
|
|
ScriptRuntime.emptyArgs);
|
|
}
|
|
result.append(ScriptRuntime.toString(elem));
|
|
}
|
|
}
|
|
}
|
|
} finally {
|
|
if (toplevel) {
|
|
cx.iterating = null;
|
|
}
|
|
}
|
|
|
|
if (toSource) {
|
|
//for [,,].length behavior; we want toString to be symmetric.
|
|
if (!haslast && i > 0)
|
|
result.append(", ]");
|
|
else
|
|
result.append(']');
|
|
}
|
|
return result.toString();
|
|
}
|
|
|
|
/**
|
|
* See ECMA 15.4.4.3
|
|
*/
|
|
private static String js_join(Context cx, Scriptable thisObj,
|
|
Object[] args)
|
|
{
|
|
long llength = getLengthProperty(cx, thisObj);
|
|
int length = (int)llength;
|
|
if (llength != length) {
|
|
throw Context.reportRuntimeError1(
|
|
"msg.arraylength.too.big", String.valueOf(llength));
|
|
}
|
|
// if no args, use "," as separator
|
|
String separator = (args.length < 1 || args[0] == Undefined.instance)
|
|
? ","
|
|
: ScriptRuntime.toString(args[0]);
|
|
if (thisObj instanceof NativeArray) {
|
|
NativeArray na = (NativeArray) thisObj;
|
|
if (na.denseOnly) {
|
|
StringBuilder sb = new StringBuilder();
|
|
for (int i = 0; i < length; i++) {
|
|
if (i != 0) {
|
|
sb.append(separator);
|
|
}
|
|
if (i < na.dense.length) {
|
|
Object temp = na.dense[i];
|
|
if (temp != null && temp != Undefined.instance &&
|
|
temp != Scriptable.NOT_FOUND)
|
|
{
|
|
sb.append(ScriptRuntime.toString(temp));
|
|
}
|
|
}
|
|
}
|
|
return sb.toString();
|
|
}
|
|
}
|
|
if (length == 0) {
|
|
return "";
|
|
}
|
|
String[] buf = new String[length];
|
|
int total_size = 0;
|
|
for (int i = 0; i != length; i++) {
|
|
Object temp = getElem(cx, thisObj, i);
|
|
if (temp != null && temp != Undefined.instance) {
|
|
String str = ScriptRuntime.toString(temp);
|
|
total_size += str.length();
|
|
buf[i] = str;
|
|
}
|
|
}
|
|
total_size += (length - 1) * separator.length();
|
|
StringBuilder sb = new StringBuilder(total_size);
|
|
for (int i = 0; i != length; i++) {
|
|
if (i != 0) {
|
|
sb.append(separator);
|
|
}
|
|
String str = buf[i];
|
|
if (str != null) {
|
|
// str == null for undefined or null
|
|
sb.append(str);
|
|
}
|
|
}
|
|
return sb.toString();
|
|
}
|
|
|
|
/**
|
|
* See ECMA 15.4.4.4
|
|
*/
|
|
private static Scriptable js_reverse(Context cx, Scriptable thisObj,
|
|
Object[] args)
|
|
{
|
|
if (thisObj instanceof NativeArray) {
|
|
NativeArray na = (NativeArray) thisObj;
|
|
if (na.denseOnly) {
|
|
for (int i=0, j=((int)na.length)-1; i < j; i++,j--) {
|
|
Object temp = na.dense[i];
|
|
na.dense[i] = na.dense[j];
|
|
na.dense[j] = temp;
|
|
}
|
|
return thisObj;
|
|
}
|
|
}
|
|
long len = getLengthProperty(cx, thisObj);
|
|
|
|
long half = len / 2;
|
|
for(long i=0; i < half; i++) {
|
|
long j = len - i - 1;
|
|
Object temp1 = getElem(cx, thisObj, i);
|
|
Object temp2 = getElem(cx, thisObj, j);
|
|
setElem(cx, thisObj, i, temp2);
|
|
setElem(cx, thisObj, j, temp1);
|
|
}
|
|
return thisObj;
|
|
}
|
|
|
|
/**
|
|
* See ECMA 15.4.4.5
|
|
*/
|
|
private static Scriptable js_sort(Context cx, Scriptable scope,
|
|
Scriptable thisObj, Object[] args)
|
|
{
|
|
long length = getLengthProperty(cx, thisObj);
|
|
|
|
if (length <= 1) { return thisObj; }
|
|
|
|
Object compare;
|
|
Object[] cmpBuf;
|
|
|
|
if (args.length > 0 && Undefined.instance != args[0]) {
|
|
// sort with given compare function
|
|
compare = args[0];
|
|
cmpBuf = new Object[2]; // Buffer for cmp arguments
|
|
} else {
|
|
// sort with default compare
|
|
compare = null;
|
|
cmpBuf = null;
|
|
}
|
|
if (thisObj instanceof NativeArray) {
|
|
NativeArray na = (NativeArray) thisObj;
|
|
if (na.denseOnly) {
|
|
int ilength = (int) length;
|
|
heapsort(cx, scope, na.dense, ilength, compare, cmpBuf);
|
|
return thisObj;
|
|
}
|
|
}
|
|
|
|
// Should we use the extended sort function, or the faster one?
|
|
if (length >= Integer.MAX_VALUE) {
|
|
heapsort_extended(cx, scope, thisObj, length, compare, cmpBuf);
|
|
} else {
|
|
int ilength = (int)length;
|
|
// copy the JS array into a working array, so it can be
|
|
// sorted cheaply.
|
|
Object[] working = new Object[ilength];
|
|
for (int i = 0; i != ilength; ++i) {
|
|
working[i] = getElem(cx, thisObj, i);
|
|
}
|
|
|
|
heapsort(cx, scope, working, ilength, compare, cmpBuf);
|
|
|
|
// copy the working array back into thisObj
|
|
for (int i = 0; i != ilength; ++i) {
|
|
setElem(cx, thisObj, i, working[i]);
|
|
}
|
|
}
|
|
return thisObj;
|
|
}
|
|
|
|
// Return true only if x > y
|
|
private static boolean isBigger(Context cx, Scriptable scope,
|
|
Object x, Object y,
|
|
Object cmp, Object[] cmpBuf)
|
|
{
|
|
if (cmp == null) {
|
|
if (cmpBuf != null) Kit.codeBug();
|
|
} else {
|
|
if (cmpBuf == null || cmpBuf.length != 2) Kit.codeBug();
|
|
}
|
|
|
|
Object undef = Undefined.instance;
|
|
Object notfound = Scriptable.NOT_FOUND;
|
|
|
|
// sort undefined to end
|
|
if (y == undef || y == notfound) {
|
|
return false; // x can not be bigger then undef
|
|
} else if (x == undef || x == notfound) {
|
|
return true; // y != undef here, so x > y
|
|
}
|
|
|
|
if (cmp == null) {
|
|
// if no cmp function supplied, sort lexicographically
|
|
String a = ScriptRuntime.toString(x);
|
|
String b = ScriptRuntime.toString(y);
|
|
return a.compareTo(b) > 0;
|
|
}
|
|
else {
|
|
// assemble args and call supplied JS cmp function
|
|
cmpBuf[0] = x;
|
|
cmpBuf[1] = y;
|
|
Callable fun = ScriptRuntime.getValueFunctionAndThis(cmp, cx);
|
|
Scriptable funThis = ScriptRuntime.lastStoredScriptable(cx);
|
|
|
|
Object ret = fun.call(cx, scope, funThis, cmpBuf);
|
|
double d = ScriptRuntime.toNumber(ret);
|
|
|
|
// XXX what to do when cmp function returns NaN? ECMA states
|
|
// that it's then not a 'consistent comparison function'... but
|
|
// then what do we do? Back out and start over with the generic
|
|
// cmp function when we see a NaN? Throw an error?
|
|
|
|
// for now, just ignore it:
|
|
|
|
return d > 0;
|
|
}
|
|
}
|
|
|
|
/** Heapsort implementation.
|
|
* See "Introduction to Algorithms" by Cormen, Leiserson, Rivest for details.
|
|
* Adjusted for zero based indexes.
|
|
*/
|
|
private static void heapsort(Context cx, Scriptable scope,
|
|
Object[] array, int length,
|
|
Object cmp, Object[] cmpBuf)
|
|
{
|
|
if (length <= 1) Kit.codeBug();
|
|
|
|
// Build heap
|
|
for (int i = length / 2; i != 0;) {
|
|
--i;
|
|
Object pivot = array[i];
|
|
heapify(cx, scope, pivot, array, i, length, cmp, cmpBuf);
|
|
}
|
|
|
|
// Sort heap
|
|
for (int i = length; i != 1;) {
|
|
--i;
|
|
Object pivot = array[i];
|
|
array[i] = array[0];
|
|
heapify(cx, scope, pivot, array, 0, i, cmp, cmpBuf);
|
|
}
|
|
}
|
|
|
|
/** pivot and child heaps of i should be made into heap starting at i,
|
|
* original array[i] is never used to have less array access during sorting.
|
|
*/
|
|
private static void heapify(Context cx, Scriptable scope,
|
|
Object pivot, Object[] array, int i, int end,
|
|
Object cmp, Object[] cmpBuf)
|
|
{
|
|
for (;;) {
|
|
int child = i * 2 + 1;
|
|
if (child >= end) {
|
|
break;
|
|
}
|
|
Object childVal = array[child];
|
|
if (child + 1 < end) {
|
|
Object nextVal = array[child + 1];
|
|
if (isBigger(cx, scope, nextVal, childVal, cmp, cmpBuf)) {
|
|
++child; childVal = nextVal;
|
|
}
|
|
}
|
|
if (!isBigger(cx, scope, childVal, pivot, cmp, cmpBuf)) {
|
|
break;
|
|
}
|
|
array[i] = childVal;
|
|
i = child;
|
|
}
|
|
array[i] = pivot;
|
|
}
|
|
|
|
/** Version of heapsort that call getElem/setElem on target to query/assign
|
|
* array elements instead of Java array access
|
|
*/
|
|
private static void heapsort_extended(Context cx, Scriptable scope,
|
|
Scriptable target, long length,
|
|
Object cmp, Object[] cmpBuf)
|
|
{
|
|
if (length <= 1) Kit.codeBug();
|
|
|
|
// Build heap
|
|
for (long i = length / 2; i != 0;) {
|
|
--i;
|
|
Object pivot = getElem(cx, target, i);
|
|
heapify_extended(cx, scope, pivot, target, i, length, cmp, cmpBuf);
|
|
}
|
|
|
|
// Sort heap
|
|
for (long i = length; i != 1;) {
|
|
--i;
|
|
Object pivot = getElem(cx, target, i);
|
|
setElem(cx, target, i, getElem(cx, target, 0));
|
|
heapify_extended(cx, scope, pivot, target, 0, i, cmp, cmpBuf);
|
|
}
|
|
}
|
|
|
|
private static void heapify_extended(Context cx, Scriptable scope,
|
|
Object pivot, Scriptable target,
|
|
long i, long end,
|
|
Object cmp, Object[] cmpBuf)
|
|
{
|
|
for (;;) {
|
|
long child = i * 2 + 1;
|
|
if (child >= end) {
|
|
break;
|
|
}
|
|
Object childVal = getElem(cx, target, child);
|
|
if (child + 1 < end) {
|
|
Object nextVal = getElem(cx, target, child + 1);
|
|
if (isBigger(cx, scope, nextVal, childVal, cmp, cmpBuf)) {
|
|
++child; childVal = nextVal;
|
|
}
|
|
}
|
|
if (!isBigger(cx, scope, childVal, pivot, cmp, cmpBuf)) {
|
|
break;
|
|
}
|
|
setElem(cx, target, i, childVal);
|
|
i = child;
|
|
}
|
|
setElem(cx, target, i, pivot);
|
|
}
|
|
|
|
/**
|
|
* Non-ECMA methods.
|
|
*/
|
|
|
|
private static Object js_push(Context cx, Scriptable thisObj,
|
|
Object[] args)
|
|
{
|
|
if (thisObj instanceof NativeArray) {
|
|
NativeArray na = (NativeArray) thisObj;
|
|
if (na.denseOnly &&
|
|
na.ensureCapacity((int) na.length + args.length))
|
|
{
|
|
for (int i = 0; i < args.length; i++) {
|
|
na.dense[(int)na.length++] = args[i];
|
|
}
|
|
return ScriptRuntime.wrapNumber(na.length);
|
|
}
|
|
}
|
|
long length = getLengthProperty(cx, thisObj);
|
|
for (int i = 0; i < args.length; i++) {
|
|
setElem(cx, thisObj, length + i, args[i]);
|
|
}
|
|
|
|
length += args.length;
|
|
Object lengthObj = setLengthProperty(cx, thisObj, length);
|
|
|
|
/*
|
|
* If JS1.2, follow Perl4 by returning the last thing pushed.
|
|
* Otherwise, return the new array length.
|
|
*/
|
|
if (cx.getLanguageVersion() == Context.VERSION_1_2)
|
|
// if JS1.2 && no arguments, return undefined.
|
|
return args.length == 0
|
|
? Undefined.instance
|
|
: args[args.length - 1];
|
|
|
|
else
|
|
return lengthObj;
|
|
}
|
|
|
|
private static Object js_pop(Context cx, Scriptable thisObj,
|
|
Object[] args)
|
|
{
|
|
Object result;
|
|
if (thisObj instanceof NativeArray) {
|
|
NativeArray na = (NativeArray) thisObj;
|
|
if (na.denseOnly && na.length > 0) {
|
|
na.length--;
|
|
result = na.dense[(int)na.length];
|
|
na.dense[(int)na.length] = NOT_FOUND;
|
|
return result;
|
|
}
|
|
}
|
|
long length = getLengthProperty(cx, thisObj);
|
|
if (length > 0) {
|
|
length--;
|
|
|
|
// Get the to-be-deleted property's value.
|
|
result = getElem(cx, thisObj, length);
|
|
|
|
// We don't need to delete the last property, because
|
|
// setLength does that for us.
|
|
} else {
|
|
result = Undefined.instance;
|
|
}
|
|
// necessary to match js even when length < 0; js pop will give a
|
|
// length property to any target it is called on.
|
|
setLengthProperty(cx, thisObj, length);
|
|
|
|
return result;
|
|
}
|
|
|
|
private static Object js_shift(Context cx, Scriptable thisObj,
|
|
Object[] args)
|
|
{
|
|
if (thisObj instanceof NativeArray) {
|
|
NativeArray na = (NativeArray) thisObj;
|
|
if (na.denseOnly && na.length > 0) {
|
|
na.length--;
|
|
Object result = na.dense[0];
|
|
System.arraycopy(na.dense, 1, na.dense, 0, (int)na.length);
|
|
na.dense[(int)na.length] = NOT_FOUND;
|
|
return result;
|
|
}
|
|
}
|
|
Object result;
|
|
long length = getLengthProperty(cx, thisObj);
|
|
if (length > 0) {
|
|
long i = 0;
|
|
length--;
|
|
|
|
// Get the to-be-deleted property's value.
|
|
result = getElem(cx, thisObj, i);
|
|
|
|
/*
|
|
* Slide down the array above the first element. Leave i
|
|
* set to point to the last element.
|
|
*/
|
|
if (length > 0) {
|
|
for (i = 1; i <= length; i++) {
|
|
Object temp = getElem(cx, thisObj, i);
|
|
setElem(cx, thisObj, i - 1, temp);
|
|
}
|
|
}
|
|
// We don't need to delete the last property, because
|
|
// setLength does that for us.
|
|
} else {
|
|
result = Undefined.instance;
|
|
}
|
|
setLengthProperty(cx, thisObj, length);
|
|
return result;
|
|
}
|
|
|
|
private static Object js_unshift(Context cx, Scriptable thisObj,
|
|
Object[] args)
|
|
{
|
|
if (thisObj instanceof NativeArray) {
|
|
NativeArray na = (NativeArray) thisObj;
|
|
if (na.denseOnly &&
|
|
na.ensureCapacity((int)na.length + args.length))
|
|
{
|
|
System.arraycopy(na.dense, 0, na.dense, args.length,
|
|
(int) na.length);
|
|
for (int i = 0; i < args.length; i++) {
|
|
na.dense[i] = args[i];
|
|
}
|
|
na.length += args.length;
|
|
return ScriptRuntime.wrapNumber(na.length);
|
|
}
|
|
}
|
|
long length = getLengthProperty(cx, thisObj);
|
|
int argc = args.length;
|
|
|
|
if (args.length > 0) {
|
|
/* Slide up the array to make room for args at the bottom */
|
|
if (length > 0) {
|
|
for (long last = length - 1; last >= 0; last--) {
|
|
Object temp = getElem(cx, thisObj, last);
|
|
setElem(cx, thisObj, last + argc, temp);
|
|
}
|
|
}
|
|
|
|
/* Copy from argv to the bottom of the array. */
|
|
for (int i = 0; i < args.length; i++) {
|
|
setElem(cx, thisObj, i, args[i]);
|
|
}
|
|
|
|
/* Follow Perl by returning the new array length. */
|
|
length += args.length;
|
|
return setLengthProperty(cx, thisObj, length);
|
|
}
|
|
return ScriptRuntime.wrapNumber(length);
|
|
}
|
|
|
|
private static Object js_splice(Context cx, Scriptable scope,
|
|
Scriptable thisObj, Object[] args)
|
|
{
|
|
NativeArray na = null;
|
|
boolean denseMode = false;
|
|
if (thisObj instanceof NativeArray) {
|
|
na = (NativeArray) thisObj;
|
|
denseMode = na.denseOnly;
|
|
}
|
|
|
|
/* create an empty Array to return. */
|
|
scope = getTopLevelScope(scope);
|
|
int argc = args.length;
|
|
if (argc == 0)
|
|
return ScriptRuntime.newObject(cx, scope, "Array", null);
|
|
long length = getLengthProperty(cx, thisObj);
|
|
|
|
/* Convert the first argument into a starting index. */
|
|
long begin = toSliceIndex(ScriptRuntime.toInteger(args[0]), length);
|
|
argc--;
|
|
|
|
/* Convert the second argument into count */
|
|
long count;
|
|
if (args.length == 1) {
|
|
count = length - begin;
|
|
} else {
|
|
double dcount = ScriptRuntime.toInteger(args[1]);
|
|
if (dcount < 0) {
|
|
count = 0;
|
|
} else if (dcount > (length - begin)) {
|
|
count = length - begin;
|
|
} else {
|
|
count = (long)dcount;
|
|
}
|
|
argc--;
|
|
}
|
|
|
|
long end = begin + count;
|
|
|
|
/* If there are elements to remove, put them into the return value. */
|
|
Object result;
|
|
if (count != 0) {
|
|
if (count == 1
|
|
&& (cx.getLanguageVersion() == Context.VERSION_1_2))
|
|
{
|
|
/*
|
|
* JS lacks "list context", whereby in Perl one turns the
|
|
* single scalar that's spliced out into an array just by
|
|
* assigning it to @single instead of $single, or by using it
|
|
* as Perl push's first argument, for instance.
|
|
*
|
|
* JS1.2 emulated Perl too closely and returned a non-Array for
|
|
* the single-splice-out case, requiring callers to test and
|
|
* wrap in [] if necessary. So JS1.3, default, and other
|
|
* versions all return an array of length 1 for uniformity.
|
|
*/
|
|
result = getElem(cx, thisObj, begin);
|
|
} else {
|
|
if (denseMode) {
|
|
int intLen = (int) (end - begin);
|
|
Object[] copy = new Object[intLen];
|
|
System.arraycopy(na.dense, (int) begin, copy, 0, intLen);
|
|
result = cx.newArray(scope, copy);
|
|
} else {
|
|
Scriptable resultArray = ScriptRuntime.newObject(cx, scope,
|
|
"Array", null);
|
|
for (long last = begin; last != end; last++) {
|
|
Object temp = getElem(cx, thisObj, last);
|
|
setElem(cx, resultArray, last - begin, temp);
|
|
}
|
|
result = resultArray;
|
|
}
|
|
}
|
|
} else { // (count == 0)
|
|
if (cx.getLanguageVersion() == Context.VERSION_1_2) {
|
|
/* Emulate C JS1.2; if no elements are removed, return undefined. */
|
|
result = Undefined.instance;
|
|
} else {
|
|
result = ScriptRuntime.newObject(cx, scope, "Array", null);
|
|
}
|
|
}
|
|
|
|
/* Find the direction (up or down) to copy and make way for argv. */
|
|
long delta = argc - count;
|
|
if (denseMode && length + delta < Integer.MAX_VALUE &&
|
|
na.ensureCapacity((int) (length + delta)))
|
|
{
|
|
System.arraycopy(na.dense, (int) end, na.dense,
|
|
(int) (begin + argc), (int) (length - end));
|
|
if (argc > 0) {
|
|
System.arraycopy(args, 2, na.dense, (int) begin, argc);
|
|
}
|
|
if (delta < 0) {
|
|
Arrays.fill(na.dense, (int) (length + delta), (int) length,
|
|
NOT_FOUND);
|
|
}
|
|
na.length = length + delta;
|
|
return result;
|
|
}
|
|
|
|
if (delta > 0) {
|
|
for (long last = length - 1; last >= end; last--) {
|
|
Object temp = getElem(cx, thisObj, last);
|
|
setElem(cx, thisObj, last + delta, temp);
|
|
}
|
|
} else if (delta < 0) {
|
|
for (long last = end; last < length; last++) {
|
|
Object temp = getElem(cx, thisObj, last);
|
|
setElem(cx, thisObj, last + delta, temp);
|
|
}
|
|
}
|
|
|
|
/* Copy from argv into the hole to complete the splice. */
|
|
int argoffset = args.length - argc;
|
|
for (int i = 0; i < argc; i++) {
|
|
setElem(cx, thisObj, begin + i, args[i + argoffset]);
|
|
}
|
|
|
|
/* Update length in case we deleted elements from the end. */
|
|
setLengthProperty(cx, thisObj, length + delta);
|
|
return result;
|
|
}
|
|
|
|
/*
|
|
* See Ecma 262v3 15.4.4.4
|
|
*/
|
|
private static Scriptable js_concat(Context cx, Scriptable scope,
|
|
Scriptable thisObj, Object[] args)
|
|
{
|
|
// create an empty Array to return.
|
|
scope = getTopLevelScope(scope);
|
|
Function ctor = ScriptRuntime.getExistingCtor(cx, scope, "Array");
|
|
Scriptable result = ctor.construct(cx, scope, ScriptRuntime.emptyArgs);
|
|
if (thisObj instanceof NativeArray && result instanceof NativeArray) {
|
|
NativeArray denseThis = (NativeArray) thisObj;
|
|
NativeArray denseResult = (NativeArray) result;
|
|
if (denseThis.denseOnly && denseResult.denseOnly) {
|
|
// First calculate length of resulting array
|
|
boolean canUseDense = true;
|
|
int length = (int) denseThis.length;
|
|
for (int i = 0; i < args.length && canUseDense; i++) {
|
|
if (args[i] instanceof NativeArray) {
|
|
// only try to use dense approach for Array-like
|
|
// objects that are actually NativeArrays
|
|
final NativeArray arg = (NativeArray) args[i];
|
|
canUseDense = arg.denseOnly;
|
|
length += arg.length;
|
|
} else {
|
|
length++;
|
|
}
|
|
}
|
|
if (canUseDense && denseResult.ensureCapacity(length)) {
|
|
System.arraycopy(denseThis.dense, 0, denseResult.dense,
|
|
0, (int) denseThis.length);
|
|
int cursor = (int) denseThis.length;
|
|
for (int i = 0; i < args.length && canUseDense; i++) {
|
|
if (args[i] instanceof NativeArray) {
|
|
NativeArray arg = (NativeArray) args[i];
|
|
System.arraycopy(arg.dense, 0,
|
|
denseResult.dense, cursor,
|
|
(int)arg.length);
|
|
cursor += (int)arg.length;
|
|
} else {
|
|
denseResult.dense[cursor++] = args[i];
|
|
}
|
|
}
|
|
denseResult.length = length;
|
|
return result;
|
|
}
|
|
}
|
|
}
|
|
|
|
long length;
|
|
long slot = 0;
|
|
|
|
/* Put the target in the result array; only add it as an array
|
|
* if it looks like one.
|
|
*/
|
|
if (ScriptRuntime.instanceOf(thisObj, ctor, cx)) {
|
|
length = getLengthProperty(cx, thisObj);
|
|
|
|
// Copy from the target object into the result
|
|
for (slot = 0; slot < length; slot++) {
|
|
Object temp = getElem(cx, thisObj, slot);
|
|
setElem(cx, result, slot, temp);
|
|
}
|
|
} else {
|
|
setElem(cx, result, slot++, thisObj);
|
|
}
|
|
|
|
/* Copy from the arguments into the result. If any argument
|
|
* has a numeric length property, treat it as an array and add
|
|
* elements separately; otherwise, just copy the argument.
|
|
*/
|
|
for (int i = 0; i < args.length; i++) {
|
|
if (ScriptRuntime.instanceOf(args[i], ctor, cx)) {
|
|
// ScriptRuntime.instanceOf => instanceof Scriptable
|
|
Scriptable arg = (Scriptable)args[i];
|
|
length = getLengthProperty(cx, arg);
|
|
for (long j = 0; j < length; j++, slot++) {
|
|
Object temp = getElem(cx, arg, j);
|
|
setElem(cx, result, slot, temp);
|
|
}
|
|
} else {
|
|
setElem(cx, result, slot++, args[i]);
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
private Scriptable js_slice(Context cx, Scriptable thisObj,
|
|
Object[] args)
|
|
{
|
|
Scriptable scope = getTopLevelScope(this);
|
|
Scriptable result = ScriptRuntime.newObject(cx, scope, "Array", null);
|
|
long length = getLengthProperty(cx, thisObj);
|
|
|
|
long begin, end;
|
|
if (args.length == 0) {
|
|
begin = 0;
|
|
end = length;
|
|
} else {
|
|
begin = toSliceIndex(ScriptRuntime.toInteger(args[0]), length);
|
|
if (args.length == 1) {
|
|
end = length;
|
|
} else {
|
|
end = toSliceIndex(ScriptRuntime.toInteger(args[1]), length);
|
|
}
|
|
}
|
|
|
|
for (long slot = begin; slot < end; slot++) {
|
|
Object temp = getElem(cx, thisObj, slot);
|
|
setElem(cx, result, slot - begin, temp);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
private static long toSliceIndex(double value, long length) {
|
|
long result;
|
|
if (value < 0.0) {
|
|
if (value + length < 0.0) {
|
|
result = 0;
|
|
} else {
|
|
result = (long)(value + length);
|
|
}
|
|
} else if (value > length) {
|
|
result = length;
|
|
} else {
|
|
result = (long)value;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Implements the methods "indexOf" and "lastIndexOf".
|
|
*/
|
|
private Object indexOfHelper(Context cx, Scriptable thisObj,
|
|
Object[] args, boolean isLast)
|
|
{
|
|
Object compareTo = args.length > 0 ? args[0] : Undefined.instance;
|
|
long length = getLengthProperty(cx, thisObj);
|
|
long start;
|
|
if (isLast) {
|
|
// lastIndexOf
|
|
/*
|
|
* From http://developer.mozilla.org/en/docs/Core_JavaScript_1.5_Reference:Objects:Array:lastIndexOf
|
|
* The index at which to start searching backwards. Defaults to the
|
|
* array's length, i.e. the whole array will be searched. If the
|
|
* index is greater than or equal to the length of the array, the
|
|
* whole array will be searched. If negative, it is taken as the
|
|
* offset from the end of the array. Note that even when the index
|
|
* is negative, the array is still searched from back to front. If
|
|
* the calculated index is less than 0, -1 is returned, i.e. the
|
|
* array will not be searched.
|
|
*/
|
|
if (args.length < 2) {
|
|
// default
|
|
start = length-1;
|
|
} else {
|
|
start = ScriptRuntime.toInt32(ScriptRuntime.toNumber(args[1]));
|
|
if (start >= length)
|
|
start = length-1;
|
|
else if (start < 0)
|
|
start += length;
|
|
// Note that start may be negative, but that's okay
|
|
// as the result of -1 will fall out from the code below
|
|
}
|
|
} else {
|
|
// indexOf
|
|
/*
|
|
* From http://developer.mozilla.org/en/docs/Core_JavaScript_1.5_Reference:Objects:Array:indexOf
|
|
* The index at which to begin the search. Defaults to 0, i.e. the
|
|
* whole array will be searched. If the index is greater than or
|
|
* equal to the length of the array, -1 is returned, i.e. the array
|
|
* will not be searched. If negative, it is taken as the offset from
|
|
* the end of the array. Note that even when the index is negative,
|
|
* the array is still searched from front to back. If the calculated
|
|
* index is less than 0, the whole array will be searched.
|
|
*/
|
|
if (args.length < 2) {
|
|
// default
|
|
start = 0;
|
|
} else {
|
|
start = ScriptRuntime.toInt32(ScriptRuntime.toNumber(args[1]));
|
|
if (start < 0) {
|
|
start += length;
|
|
if (start < 0)
|
|
start = 0;
|
|
}
|
|
// Note that start may be > length-1, but that's okay
|
|
// as the result of -1 will fall out from the code below
|
|
}
|
|
}
|
|
if (thisObj instanceof NativeArray) {
|
|
NativeArray na = (NativeArray) thisObj;
|
|
if (na.denseOnly) {
|
|
if (isLast) {
|
|
for (int i=(int)start; i >= 0; i--) {
|
|
if (na.dense[i] != Scriptable.NOT_FOUND &&
|
|
ScriptRuntime.shallowEq(na.dense[i], compareTo))
|
|
{
|
|
return new Long(i);
|
|
}
|
|
}
|
|
} else {
|
|
for (int i=(int)start; i < length; i++) {
|
|
if (na.dense[i] != Scriptable.NOT_FOUND &&
|
|
ScriptRuntime.shallowEq(na.dense[i], compareTo))
|
|
{
|
|
return new Long(i);
|
|
}
|
|
}
|
|
}
|
|
return NEGATIVE_ONE;
|
|
}
|
|
}
|
|
if (isLast) {
|
|
for (long i=start; i >= 0; i--) {
|
|
if (ScriptRuntime.shallowEq(getElem(cx, thisObj, i), compareTo)) {
|
|
return new Long(i);
|
|
}
|
|
}
|
|
} else {
|
|
for (long i=start; i < length; i++) {
|
|
if (ScriptRuntime.shallowEq(getElem(cx, thisObj, i), compareTo)) {
|
|
return new Long(i);
|
|
}
|
|
}
|
|
}
|
|
return NEGATIVE_ONE;
|
|
}
|
|
|
|
/**
|
|
* Implements the methods "every", "filter", "forEach", "map", and "some".
|
|
*/
|
|
private Object iterativeMethod(Context cx, int id, Scriptable scope,
|
|
Scriptable thisObj, Object[] args)
|
|
{
|
|
Object callbackArg = args.length > 0 ? args[0] : Undefined.instance;
|
|
if (callbackArg == null || !(callbackArg instanceof Function)) {
|
|
throw ScriptRuntime.notFunctionError(
|
|
ScriptRuntime.toString(callbackArg));
|
|
}
|
|
Function f = (Function) callbackArg;
|
|
Scriptable parent = ScriptableObject.getTopLevelScope(f);
|
|
Scriptable thisArg;
|
|
if (args.length < 2 || args[1] == null || args[1] == Undefined.instance)
|
|
{
|
|
thisArg = parent;
|
|
} else {
|
|
thisArg = ScriptRuntime.toObject(cx, scope, args[1]);
|
|
}
|
|
long length = getLengthProperty(cx, thisObj);
|
|
Scriptable array = ScriptRuntime.newObject(cx, scope, "Array", null);
|
|
long j=0;
|
|
for (long i=0; i < length; i++) {
|
|
Object[] innerArgs = new Object[3];
|
|
Object elem = (i > Integer.MAX_VALUE)
|
|
? ScriptableObject.getProperty(thisObj, Long.toString(i))
|
|
: ScriptableObject.getProperty(thisObj, (int)i);
|
|
if (elem == Scriptable.NOT_FOUND) {
|
|
continue;
|
|
}
|
|
innerArgs[0] = elem;
|
|
innerArgs[1] = new Long(i);
|
|
innerArgs[2] = thisObj;
|
|
Object result = f.call(cx, parent, thisArg, innerArgs);
|
|
switch (id) {
|
|
case Id_every:
|
|
if (!ScriptRuntime.toBoolean(result))
|
|
return Boolean.FALSE;
|
|
break;
|
|
case Id_filter:
|
|
if (ScriptRuntime.toBoolean(result))
|
|
setElem(cx, array, j++, innerArgs[0]);
|
|
break;
|
|
case Id_forEach:
|
|
break;
|
|
case Id_map:
|
|
setElem(cx, array, i, result);
|
|
break;
|
|
case Id_some:
|
|
if (ScriptRuntime.toBoolean(result))
|
|
return Boolean.TRUE;
|
|
break;
|
|
}
|
|
}
|
|
switch (id) {
|
|
case Id_every:
|
|
return Boolean.TRUE;
|
|
case Id_filter:
|
|
case Id_map:
|
|
return array;
|
|
case Id_some:
|
|
return Boolean.FALSE;
|
|
case Id_forEach:
|
|
default:
|
|
return Undefined.instance;
|
|
}
|
|
}
|
|
|
|
// #string_id_map#
|
|
|
|
@Override
|
|
protected int findPrototypeId(String s)
|
|
{
|
|
int id;
|
|
// #generated# Last update: 2005-09-26 15:47:42 EDT
|
|
L0: { id = 0; String X = null; int c;
|
|
L: switch (s.length()) {
|
|
case 3: c=s.charAt(0);
|
|
if (c=='m') { if (s.charAt(2)=='p' && s.charAt(1)=='a') {id=Id_map; break L0;} }
|
|
else if (c=='p') { if (s.charAt(2)=='p' && s.charAt(1)=='o') {id=Id_pop; break L0;} }
|
|
break L;
|
|
case 4: switch (s.charAt(2)) {
|
|
case 'i': X="join";id=Id_join; break L;
|
|
case 'm': X="some";id=Id_some; break L;
|
|
case 'r': X="sort";id=Id_sort; break L;
|
|
case 's': X="push";id=Id_push; break L;
|
|
} break L;
|
|
case 5: c=s.charAt(1);
|
|
if (c=='h') { X="shift";id=Id_shift; }
|
|
else if (c=='l') { X="slice";id=Id_slice; }
|
|
else if (c=='v') { X="every";id=Id_every; }
|
|
break L;
|
|
case 6: c=s.charAt(0);
|
|
if (c=='c') { X="concat";id=Id_concat; }
|
|
else if (c=='f') { X="filter";id=Id_filter; }
|
|
else if (c=='s') { X="splice";id=Id_splice; }
|
|
break L;
|
|
case 7: switch (s.charAt(0)) {
|
|
case 'f': X="forEach";id=Id_forEach; break L;
|
|
case 'i': X="indexOf";id=Id_indexOf; break L;
|
|
case 'r': X="reverse";id=Id_reverse; break L;
|
|
case 'u': X="unshift";id=Id_unshift; break L;
|
|
} 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=='l') { X="lastIndexOf";id=Id_lastIndexOf; }
|
|
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_join = 5,
|
|
Id_reverse = 6,
|
|
Id_sort = 7,
|
|
Id_push = 8,
|
|
Id_pop = 9,
|
|
Id_shift = 10,
|
|
Id_unshift = 11,
|
|
Id_splice = 12,
|
|
Id_concat = 13,
|
|
Id_slice = 14,
|
|
Id_indexOf = 15,
|
|
Id_lastIndexOf = 16,
|
|
Id_every = 17,
|
|
Id_filter = 18,
|
|
Id_forEach = 19,
|
|
Id_map = 20,
|
|
Id_some = 21,
|
|
|
|
MAX_PROTOTYPE_ID = 21;
|
|
|
|
// #/string_id_map#
|
|
|
|
private static final int
|
|
ConstructorId_join = -Id_join,
|
|
ConstructorId_reverse = -Id_reverse,
|
|
ConstructorId_sort = -Id_sort,
|
|
ConstructorId_push = -Id_push,
|
|
ConstructorId_pop = -Id_pop,
|
|
ConstructorId_shift = -Id_shift,
|
|
ConstructorId_unshift = -Id_unshift,
|
|
ConstructorId_splice = -Id_splice,
|
|
ConstructorId_concat = -Id_concat,
|
|
ConstructorId_slice = -Id_slice,
|
|
ConstructorId_indexOf = -Id_indexOf,
|
|
ConstructorId_lastIndexOf = -Id_lastIndexOf,
|
|
ConstructorId_every = -Id_every,
|
|
ConstructorId_filter = -Id_filter,
|
|
ConstructorId_forEach = -Id_forEach,
|
|
ConstructorId_map = -Id_map,
|
|
ConstructorId_some = -Id_some;
|
|
|
|
/**
|
|
* Internal representation of the JavaScript array's length property.
|
|
*/
|
|
private long length;
|
|
|
|
/**
|
|
* Fast storage for dense arrays. Sparse arrays will use the superclass's
|
|
* hashtable storage scheme.
|
|
*/
|
|
private Object[] dense;
|
|
|
|
/**
|
|
* True if all numeric properties are stored in <code>dense</code>.
|
|
*/
|
|
private boolean denseOnly;
|
|
|
|
/**
|
|
* The maximum size of <code>dense</code> that will be allocated initially.
|
|
*/
|
|
private static int maximumInitialCapacity = 10000;
|
|
|
|
/**
|
|
* The default capacity for <code>dense</code>.
|
|
*/
|
|
private static final int DEFAULT_INITIAL_CAPACITY = 10;
|
|
|
|
/**
|
|
* The factor to grow <code>dense</code> by.
|
|
*/
|
|
private static final double GROW_FACTOR = 1.5;
|
|
private static final int MAX_PRE_GROW_SIZE = (int)(Integer.MAX_VALUE / GROW_FACTOR);
|
|
}
|