aboutsummaryrefslogtreecommitdiffstats
path: root/trunk/infrastructure/rhino1_7R1/src/org/mozilla/javascript/NativeArray.java
diff options
context:
space:
mode:
Diffstat (limited to 'trunk/infrastructure/rhino1_7R1/src/org/mozilla/javascript/NativeArray.java')
-rw-r--r--trunk/infrastructure/rhino1_7R1/src/org/mozilla/javascript/NativeArray.java1727
1 files changed, 1727 insertions, 0 deletions
diff --git a/trunk/infrastructure/rhino1_7R1/src/org/mozilla/javascript/NativeArray.java b/trunk/infrastructure/rhino1_7R1/src/org/mozilla/javascript/NativeArray.java
new file mode 100644
index 0000000..b170ff4
--- /dev/null
+++ b/trunk/infrastructure/rhino1_7R1/src/org/mozilla/javascript/NativeArray.java
@@ -0,0 +1,1727 @@
+/* -*- 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
+ * Mike McCabe
+ * Igor Bukanov
+ *
+ * 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;
+
+import java.util.Arrays;
+
+/**
+ * This class implements the Array native object.
+ * @author Norris Boyd
+ * @author Mike McCabe
+ */
+public class NativeArray extends IdScriptableObject
+{
+ static final long serialVersionUID = 7331366857676127338L;
+
+ /*
+ * Optimization possibilities and open issues:
+ * - Long vs. double schizophrenia. I suspect it might be better
+ * to use double throughout.
+ *
+ * - Functions that need a new Array call "new Array" in the
+ * current scope rather than using a hardwired constructor;
+ * "Array" could be redefined. It turns out that js calls the
+ * equivalent of "new Array" in the current scope, except that it
+ * always gets at least an object back, even when Array == null.
+ */
+
+ private static final Object ARRAY_TAG = new Object();
+ private static final Integer NEGATIVE_ONE = new Integer(-1);
+
+ static void init(Scriptable scope, boolean sealed)
+ {
+ NativeArray obj = new NativeArray(0);
+ obj.exportAsJSClass(MAX_PROTOTYPE_ID, scope, sealed);
+ }
+
+ static int getMaximumInitialCapacity() {
+ return maximumInitialCapacity;
+ }
+
+ static void setMaximumInitialCapacity(int maximumInitialCapacity) {
+ NativeArray.maximumInitialCapacity = maximumInitialCapacity;
+ }
+
+ public NativeArray(long lengthArg)
+ {
+ denseOnly = lengthArg <= maximumInitialCapacity;
+ if (denseOnly) {
+ int intLength = (int) lengthArg;
+ if (intLength < DEFAULT_INITIAL_CAPACITY)
+ intLength = DEFAULT_INITIAL_CAPACITY;
+ dense = new Object[intLength];
+ Arrays.fill(dense, Scriptable.NOT_FOUND);
+ }
+ length = lengthArg;
+ }
+
+ public NativeArray(Object[] array)
+ {
+ denseOnly = true;
+ dense = array;
+ length = array.length;
+ }
+
+ public String getClassName()
+ {
+ return "Array";
+ }
+
+ private static final int
+ Id_length = 1,
+ MAX_INSTANCE_ID = 1;
+
+ protected int getMaxInstanceId()
+ {
+ return MAX_INSTANCE_ID;
+ }
+
+ protected int findInstanceIdInfo(String s)
+ {
+ if (s.equals("length")) {
+ return instanceIdInfo(DONTENUM | PERMANENT, Id_length);
+ }
+ return super.findInstanceIdInfo(s);
+ }
+
+ protected String getInstanceIdName(int id)
+ {
+ if (id == Id_length) { return "length"; }
+ return super.getInstanceIdName(id);
+ }
+
+ protected Object getInstanceIdValue(int id)
+ {
+ if (id == Id_length) {
+ return ScriptRuntime.wrapNumber(length);
+ }
+ return super.getInstanceIdValue(id);
+ }
+
+ protected void setInstanceIdValue(int id, Object value)
+ {
+ if (id == Id_length) {
+ setLength(value); return;
+ }
+ super.setInstanceIdValue(id, value);
+ }
+
+ protected void fillConstructorProperties(IdFunctionObject ctor)
+ {
+ addIdFunctionProperty(ctor, ARRAY_TAG, ConstructorId_join,
+ "join", 2);
+ addIdFunctionProperty(ctor, ARRAY_TAG, ConstructorId_reverse,
+ "reverse", 1);
+ addIdFunctionProperty(ctor, ARRAY_TAG, ConstructorId_sort,
+ "sort", 2);
+ addIdFunctionProperty(ctor, ARRAY_TAG, ConstructorId_push,
+ "push", 2);
+ addIdFunctionProperty(ctor, ARRAY_TAG, ConstructorId_pop,
+ "pop", 2);
+ addIdFunctionProperty(ctor, ARRAY_TAG, ConstructorId_shift,
+ "shift", 2);
+ addIdFunctionProperty(ctor, ARRAY_TAG, ConstructorId_unshift,
+ "unshift", 2);
+ addIdFunctionProperty(ctor, ARRAY_TAG, ConstructorId_splice,
+ "splice", 2);
+ addIdFunctionProperty(ctor, ARRAY_TAG, ConstructorId_concat,
+ "concat", 2);
+ addIdFunctionProperty(ctor, ARRAY_TAG, ConstructorId_slice,
+ "slice", 2);
+ addIdFunctionProperty(ctor, ARRAY_TAG, ConstructorId_indexOf,
+ "indexOf", 2);
+ addIdFunctionProperty(ctor, ARRAY_TAG, ConstructorId_lastIndexOf,
+ "lastIndexOf", 2);
+ addIdFunctionProperty(ctor, ARRAY_TAG, ConstructorId_every,
+ "every", 2);
+ addIdFunctionProperty(ctor, ARRAY_TAG, ConstructorId_filter,
+ "filter", 2);
+ addIdFunctionProperty(ctor, ARRAY_TAG, ConstructorId_forEach,
+ "forEach", 2);
+ addIdFunctionProperty(ctor, ARRAY_TAG, ConstructorId_map,
+ "map", 2);
+ addIdFunctionProperty(ctor, ARRAY_TAG, ConstructorId_some,
+ "some", 2);
+ 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=0; s="toString"; break;
+ case Id_toLocaleString: arity=1; s="toLocaleString"; break;
+ case Id_toSource: arity=0; s="toSource"; break;
+ case Id_join: arity=1; s="join"; break;
+ case Id_reverse: arity=0; s="reverse"; break;
+ case Id_sort: arity=1; s="sort"; break;
+ case Id_push: arity=1; s="push"; break;
+ case Id_pop: arity=1; s="pop"; break;
+ case Id_shift: arity=1; s="shift"; break;
+ case Id_unshift: arity=1; s="unshift"; break;
+ case Id_splice: arity=1; s="splice"; break;
+ case Id_concat: arity=1; s="concat"; break;
+ case Id_slice: arity=1; s="slice"; break;
+ case Id_indexOf: arity=1; s="indexOf"; break;
+ case Id_lastIndexOf: arity=1; s="lastIndexOf"; break;
+ case Id_every: arity=1; s="every"; break;
+ case Id_filter: arity=1; s="filter"; break;
+ case Id_forEach: arity=1; s="forEach"; break;
+ case Id_map: arity=1; s="map"; break;
+ case Id_some: arity=1; s="some"; break;
+ default: throw new IllegalArgumentException(String.valueOf(id));
+ }
+ initPrototypeMethod(ARRAY_TAG, id, s, arity);
+ }
+
+ public Object execIdCall(IdFunctionObject f, Context cx, Scriptable scope,
+ Scriptable thisObj, Object[] args)
+ {
+ if (!f.hasTag(ARRAY_TAG)) {
+ return super.execIdCall(f, cx, scope, thisObj, args);
+ }
+ int id = f.methodId();
+ again:
+ for (;;) {
+ switch (id) {
+ case ConstructorId_join:
+ case ConstructorId_reverse:
+ case ConstructorId_sort:
+ case ConstructorId_push:
+ case ConstructorId_pop:
+ case ConstructorId_shift:
+ case ConstructorId_unshift:
+ case ConstructorId_splice:
+ case ConstructorId_concat:
+ case ConstructorId_slice:
+ case ConstructorId_indexOf:
+ case ConstructorId_lastIndexOf:
+ case ConstructorId_every:
+ case ConstructorId_filter:
+ case ConstructorId_forEach:
+ case ConstructorId_map:
+ case ConstructorId_some: {
+ thisObj = ScriptRuntime.toObject(scope, args[0]);
+ Object[] newArgs = new Object[args.length-1];
+ for (int i=0; i < newArgs.length; i++)
+ newArgs[i] = args[i+1];
+ args = newArgs;
+ id = -id;
+ continue again;
+ }
+
+ case Id_constructor: {
+ boolean inNewExpr = (thisObj == null);
+ if (!inNewExpr) {
+ // IdFunctionObject.construct will set up parent, proto
+ return f.construct(cx, scope, args);
+ }
+ return jsConstructor(cx, scope, args);
+ }
+
+ case Id_toString:
+ return toStringHelper(cx, scope, thisObj,
+ cx.hasFeature(Context.FEATURE_TO_STRING_AS_SOURCE), false);
+
+ case Id_toLocaleString:
+ return toStringHelper(cx, scope, thisObj, false, true);
+
+ case Id_toSource:
+ return toStringHelper(cx, scope, thisObj, true, false);
+
+ case Id_join:
+ return js_join(cx, thisObj, args);
+
+ case Id_reverse:
+ return js_reverse(cx, thisObj, args);
+
+ case Id_sort:
+ return js_sort(cx, scope, thisObj, args);
+
+ case Id_push:
+ return js_push(cx, thisObj, args);
+
+ case Id_pop:
+ return js_pop(cx, thisObj, args);
+
+ case Id_shift:
+ return js_shift(cx, thisObj, args);
+
+ case Id_unshift:
+ return js_unshift(cx, thisObj, args);
+
+ case Id_splice:
+ return js_splice(cx, scope, thisObj, args);
+
+ case Id_concat:
+ return js_concat(cx, scope, thisObj, args);
+
+ case Id_slice:
+ return js_slice(cx, thisObj, args);
+
+ case Id_indexOf:
+ return indexOfHelper(cx, thisObj, args, false);
+
+ case Id_lastIndexOf:
+ return indexOfHelper(cx, thisObj, args, true);
+
+ case Id_every:
+ case Id_filter:
+ case Id_forEach:
+ case Id_map:
+ case Id_some:
+ return iterativeMethod(cx, id, scope, thisObj, args);
+ }
+ throw new IllegalArgumentException(String.valueOf(id));
+ }
+ }
+
+ public Object get(int index, Scriptable start)
+ {
+ if (!denseOnly && isGetterOrSetter(null, index, false))
+ return super.get(index, start);
+ if (dense != null && 0 <= index && index < dense.length)
+ return dense[index];
+ return super.get(index, start);
+ }
+
+ public boolean has(int index, Scriptable start)
+ {
+ if (!denseOnly && isGetterOrSetter(null, index, false))
+ return super.has(index, start);
+ if (dense != null && 0 <= index && index < dense.length)
+ return dense[index] != NOT_FOUND;
+ return super.has(index, start);
+ }
+
+ // if id is an array index (ECMA 15.4.0), return the number,
+ // otherwise return -1L
+ private static long toArrayIndex(String id)
+ {
+ double d = ScriptRuntime.toNumber(id);
+ if (d == d) {
+ long index = ScriptRuntime.toUint32(d);
+ if (index == d && index != 4294967295L) {
+ // Assume that ScriptRuntime.toString(index) is the same
+ // as java.lang.Long.toString(index) for long
+ if (Long.toString(index).equals(id)) {
+ return index;
+ }
+ }
+ }
+ return -1;
+ }
+
+ public void put(String id, Scriptable start, Object value)
+ {
+ super.put(id, start, value);
+ if (start == this) {
+ // If the object is sealed, super will throw exception
+ long index = toArrayIndex(id);
+ if (index >= length) {
+ length = index + 1;
+ denseOnly = false;
+ }
+ }
+ }
+
+ private boolean ensureCapacity(int capacity)
+ {
+ if (capacity > dense.length) {
+ if (capacity > MAX_PRE_GROW_SIZE) {
+ denseOnly = false;
+ return false;
+ }
+ capacity = Math.max(capacity, (int)(dense.length * GROW_FACTOR));
+ Object[] newDense = new Object[capacity];
+ System.arraycopy(dense, 0, newDense, 0, dense.length);
+ Arrays.fill(newDense, dense.length, newDense.length,
+ Scriptable.NOT_FOUND);
+ dense = newDense;
+ }
+ return true;
+ }
+
+ public void put(int index, Scriptable start, Object value)
+ {
+ if (start == this && !isSealed() && dense != null && 0 <= index &&
+ (denseOnly || !isGetterOrSetter(null, index, true)))
+ {
+ if (index < dense.length) {
+ dense[index] = value;
+ if (this.length <= index)
+ this.length = (long)index + 1;
+ return;
+ } else if (denseOnly && index < dense.length * GROW_FACTOR &&
+ ensureCapacity(index+1))
+ {
+ dense[index] = value;
+ this.length = (long)index + 1;
+ return;
+ } else {
+ denseOnly = false;
+ }
+ }
+ super.put(index, start, value);
+ if (start == this) {
+ // only set the array length if given an array index (ECMA 15.4.0)
+ if (this.length <= index) {
+ // avoid overflowing index!
+ this.length = (long)index + 1;
+ }
+ }
+ }
+
+ public void delete(int index)
+ {
+ if (dense != null && 0 <= index && index < dense.length &&
+ !isSealed() && (denseOnly || !isGetterOrSetter(null, index, true)))
+ {
+ dense[index] = NOT_FOUND;
+ } else {
+ super.delete(index);
+ }
+ }
+
+ public Object[] getIds()
+ {
+ Object[] superIds = super.getIds();
+ if (dense == null) { return superIds; }
+ int N = dense.length;
+ long currentLength = length;
+ if (N > currentLength) {
+ N = (int)currentLength;
+ }
+ if (N == 0) { return superIds; }
+ int superLength = superIds.length;
+ Object[] ids = new Object[N + superLength];
+
+ int presentCount = 0;
+ for (int i = 0; i != N; ++i) {
+ // Replace existing elements by their indexes
+ if (dense[i] != NOT_FOUND) {
+ ids[presentCount] = new Integer(i);
+ ++presentCount;
+ }
+ }
+ if (presentCount != N) {
+ // dense contains deleted elems, need to shrink the result
+ Object[] tmp = new Object[presentCount + superLength];
+ System.arraycopy(ids, 0, tmp, 0, presentCount);
+ ids = tmp;
+ }
+ System.arraycopy(superIds, 0, ids, presentCount, superLength);
+ return ids;
+ }
+
+ public Object getDefaultValue(Class hint)
+ {
+ if (hint == ScriptRuntime.NumberClass) {
+ Context cx = Context.getContext();
+ if (cx.getLanguageVersion() == Context.VERSION_1_2)
+ return new Long(length);
+ }
+ return super.getDefaultValue(hint);
+ }
+
+ /**
+ * See ECMA 15.4.1,2
+ */
+ private static Object jsConstructor(Context cx, Scriptable scope,
+ Object[] args)
+ {
+ if (args.length == 0)
+ return new NativeArray(0);
+
+ // Only use 1 arg as first element for version 1.2; for
+ // any other version (including 1.3) follow ECMA and use it as
+ // a length.
+ if (cx.getLanguageVersion() == Context.VERSION_1_2) {
+ return new NativeArray(args);
+ } else {
+ Object arg0 = args[0];
+ if (args.length > 1 || !(arg0 instanceof Number)) {
+ return new NativeArray(args);
+ } else {
+ long len = ScriptRuntime.toUint32(arg0);
+ if (len != ((Number)arg0).doubleValue())
+ throw Context.reportRuntimeError0("msg.arraylength.bad");
+ return new NativeArray(len);
+ }
+ }
+ }
+
+ public long getLength() {
+ return length;
+ }
+
+ /** @deprecated Use {@link #getLength()} instead. */
+ public long jsGet_length() {
+ return getLength();
+ }
+
+ /**
+ * 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
+ * @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;
+ }
+
+ 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; StringBuffers are limited to 2^31 in java.
+ */
+
+ long length = getLengthProperty(cx, thisObj);
+
+ StringBuffer result = new StringBuffer(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) {
+ StringBuffer sb = new StringBuffer();
+ 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();
+ StringBuffer sb = new StringBuffer(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 (ScriptRuntime.instanceOf(args[i], ctor, cx)) {
+ // only try to use dense approach for Array-like
+ // objects that are actually NativeArrays
+ canUseDense = args[i] instanceof NativeArray;
+ length += ((NativeArray) args[i]).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#
+
+ 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);
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-18 12:29:49 +0000