1 /*
2 * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package jdk.nashorn.internal.objects;
27
28 import static jdk.nashorn.internal.codegen.CompilerConstants.specialCall;
29
30 import java.lang.invoke.MethodHandle;
31 import java.lang.invoke.MethodHandles;
32 import java.nio.ByteBuffer;
33 import java.nio.ByteOrder;
34 import java.nio.IntBuffer;
35 import jdk.nashorn.internal.objects.annotations.Attribute;
36 import jdk.nashorn.internal.objects.annotations.Constructor;
37 import jdk.nashorn.internal.objects.annotations.Function;
38 import jdk.nashorn.internal.objects.annotations.Property;
39 import jdk.nashorn.internal.objects.annotations.ScriptClass;
40 import jdk.nashorn.internal.objects.annotations.Where;
41 import jdk.nashorn.internal.runtime.JSType;
42 import jdk.nashorn.internal.runtime.PropertyMap;
43 import jdk.nashorn.internal.runtime.ScriptObject;
44 import jdk.nashorn.internal.runtime.arrays.ArrayData;
45 import jdk.nashorn.internal.runtime.arrays.TypedArrayData;
46
47 /**
48 * Uint32 array for TypedArray extension
49 */
50 @ScriptClass("Uint32Array")
51 public final class NativeUint32Array extends ArrayBufferView {
52 /**
53 * The size in bytes of each element in the array.
54 */
55 @Property(attributes = Attribute.NOT_ENUMERABLE | Attribute.NOT_WRITABLE | Attribute.NOT_CONFIGURABLE, where = Where.CONSTRUCTOR)
56 public static final int BYTES_PER_ELEMENT = 4;
57
58 // initialized by nasgen
59 @SuppressWarnings("unused")
60 private static PropertyMap $nasgenmap$;
61
62 private static final Factory FACTORY = new Factory(BYTES_PER_ELEMENT) {
63 @Override
64 public ArrayBufferView construct(final NativeArrayBuffer buffer, final int byteBegin, final int length) {
65 return new NativeUint32Array(buffer, byteBegin, length);
66 }
67
68 @Override
69 public Uint32ArrayData createArrayData(final ByteBuffer nb, final int start, final int end) {
70 return new Uint32ArrayData(nb.order(ByteOrder.nativeOrder()).asIntBuffer(), start, end);
71 }
72
73 @Override
74 public String getClassName() {
75 return "Uint32Array";
76 }
77 };
78
79 private static final class Uint32ArrayData extends TypedArrayData<IntBuffer> {
80
81 private static final MethodHandle GET_ELEM = specialCall(MethodHandles.lookup(), Uint32ArrayData.class, "getElem", long.class, int.class).methodHandle();
82 private static final MethodHandle SET_ELEM = specialCall(MethodHandles.lookup(), Uint32ArrayData.class, "setElem", void.class, int.class, int.class).methodHandle();
83
84 private Uint32ArrayData(final IntBuffer nb, final int start, final int end) {
85 super(((IntBuffer)nb.position(start).limit(end)).slice(), end - start);
86 }
87
88 @Override
89 protected MethodHandle getGetElem() {
90 return GET_ELEM;
91 }
92
93 @Override
94 protected MethodHandle getSetElem() {
95 return SET_ELEM;
96 }
97
98 @Override
99 public MethodHandle getElementGetter(final Class<?> returnType, final int programPoint) {
100 if (returnType == int.class) {
101 return null;
102 }
103 return getContinuousElementGetter(getClass(), GET_ELEM, returnType, programPoint);
104 }
105
106 private long getElem(final int index) {
107 try {
108 return JSType.toUint32(nb.get(index));
109 } catch (final IndexOutOfBoundsException e) {
110 throw new ClassCastException(); //force relink - this works for unoptimistic too
111 }
112 }
113
114 private void setElem(final int index, final int elem) {
115 try {
116 if (index < nb.limit()) {
117 nb.put(index, elem);
118 }
119 } catch (final IndexOutOfBoundsException e) {
120 throw new ClassCastException();
121 }
122 }
123
124 @Override
125 public boolean isUnsigned() {
126 return true;
127 }
128
129 @Override
130 public Class<?> getElementType() {
131 return long.class;
132 }
133
134 @Override
135 public Class<?> getBoxedElementType() {
136 return Integer.class;
137 }
138
139 @Override
140 public int getInt(final int index) {
141 return (int)getLong(index);
142 }
143
144 @Override
145 public long getLong(final int index) {
146 return getElem(index);
147 }
148
149 @Override
150 public long getLongOptimistic(final int index, final int programPoint) {
151 return getElem(index);
152 }
153
154 @Override
155 public double getDouble(final int index) {
156 return getLong(index);
157 }
158
159 @Override
160 public double getDoubleOptimistic(final int index, final int programPoint) {
161 return getLong(index);
162 }
163
164 @Override
165 public Object getObject(final int index) {
166 return getLong(index);
167 }
168
169 @Override
170 public ArrayData set(final int index, final Object value, final boolean strict) {
171 return set(index, JSType.toInt32(value), strict);
172 }
173
174 @Override
175 public ArrayData set(final int index, final int value, final boolean strict) {
176 setElem(index, value);
177 return this;
178 }
179
180 @Override
181 public ArrayData set(final int index, final long value, final boolean strict) {
182 return set(index, (int)value, strict);
183 }
184
185 @Override
186 public ArrayData set(final int index, final double value, final boolean strict) {
187 return set(index, (int)value, strict);
188 }
189 }
190
191 /**
192 * Constructor
193 *
194 * @param newObj is this typed array instantiated with the new operator
195 * @param self self reference
196 * @param args args
197 *
198 * @return new typed array
199 */
200 @Constructor(arity = 1)
201 public static NativeUint32Array constructor(final boolean newObj, final Object self, final Object... args) {
202 return (NativeUint32Array)constructorImpl(newObj, args, FACTORY);
203 }
204
205 NativeUint32Array(final NativeArrayBuffer buffer, final int byteOffset, final int length) {
206 super(buffer, byteOffset, length);
207 }
208
209 @Override
210 protected Factory factory() {
211 return FACTORY;
212 }
213
214 /**
215 * Set values
216 * @param self self reference
217 * @param array multiple values of array's type to set
218 * @param offset optional start index, interpreted 0 if undefined
219 * @return undefined
220 */
221 @Function(attributes = Attribute.NOT_ENUMERABLE)
222 protected static Object set(final Object self, final Object array, final Object offset) {
223 return ArrayBufferView.setImpl(self, array, offset);
224 }
225
226 /**
227 * Returns a new TypedArray view of the ArrayBuffer store for this TypedArray,
228 * referencing the elements at begin, inclusive, up to end, exclusive. If either
229 * begin or end is negative, it refers to an index from the end of the array,
230 * as opposed to from the beginning.
231 * <p>
232 * If end is unspecified, the subarray contains all elements from begin to the end
233 * of the TypedArray. The range specified by the begin and end values is clamped to
234 * the valid index range for the current array. If the computed length of the new
235 * TypedArray would be negative, it is clamped to zero.
236 * <p>
237 * The returned TypedArray will be of the same type as the array on which this
238 * method is invoked.
239 *
240 * @param self self reference
241 * @param begin begin position
242 * @param end end position
243 *
244 * @return sub array
245 */
246 @Function(attributes = Attribute.NOT_ENUMERABLE)
247 protected static NativeUint32Array subarray(final Object self, final Object begin, final Object end) {
248 return (NativeUint32Array)ArrayBufferView.subarrayImpl(self, begin, end);
249 }
250
251 @Override
252 protected ScriptObject getPrototype(final Global global) {
253 return global.getUint32ArrayPrototype();
254 }
255 }