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comparison src/main/gov/nasa/jpf/vm/NamedFields.java @ 0:61d41facf527

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initial v8 import (history reset)
author Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
date Fri, 23 Jan 2015 10:14:01 -0800
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1 /*
2 * Copyright (C) 2014, United States Government, as represented by the
3 * Administrator of the National Aeronautics and Space Administration.
4 * All rights reserved.
5 *
6 * The Java Pathfinder core (jpf-core) platform is licensed under the
7 * Apache License, Version 2.0 (the "License"); you may not use this file except
8 * in compliance with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0.
11 *
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 */
18
19 package gov.nasa.jpf.vm;
20
21 import gov.nasa.jpf.util.HashData;
22 import gov.nasa.jpf.util.IntVector;
23
24 /**
25 * value container for non-array classes
26 */
27 public class NamedFields extends Fields {
28
29 /** this is where we store the instance data. Since field types are
30 * heterogenous, we have to map everything into int
31 */
32 protected int[] values;
33
34 public NamedFields (int dataSize) {
35 values = new int[dataSize];
36 }
37
38 @Override
39 public int[] asFieldSlots() {
40 return values;
41 }
42
43 /**
44 * give an approximation of the heap size in bytes - we assume fields are word
45 * aligned, hence the number of values*4 should be good. Note that this is
46 * overridden by ArrayFields (arrays would be packed)
47 */
48 @Override
49 public int getHeapSize () {
50 return values.length*4;
51 }
52
53 // our low level getters and setters
54 @Override
55 public int getIntValue (int index) {
56 return values[index];
57 }
58
59 public boolean isEqual(Fields o, int off, int len, int otherOff) {
60 if (o instanceof NamedFields) {
61 NamedFields other = (NamedFields) o;
62 int iEnd = off + len;
63 int jEnd = otherOff + len;
64 int[] v = other.values;
65
66 if ((iEnd > values.length) || (jEnd > v.length)) {
67 return false;
68 }
69
70 for (int i = off, j = otherOff; i < iEnd; i++, j++) {
71 if (values[i] != v[j]) {
72 return false;
73 }
74 }
75
76 return true;
77 } else {
78 return false;
79 }
80 }
81
82 // same as above, just here to make intentions clear
83 @Override
84 public int getReferenceValue (int index) {
85 return values[index];
86 }
87
88 @Override
89 public long getLongValue (int index) {
90 return Types.intsToLong(values[index + 1], values[index]);
91 }
92
93 @Override
94 public boolean getBooleanValue (int index) {
95 return Types.intToBoolean(values[index]);
96 }
97
98 @Override
99 public byte getByteValue (int index) {
100 return (byte) values[index];
101 }
102
103 @Override
104 public char getCharValue (int index) {
105 return (char) values[index];
106 }
107
108 @Override
109 public short getShortValue (int index) {
110 return (short) values[index];
111 }
112
113 // <2do> get rid of it!! this is only for internal use, to increase efficiency
114 public int[] getValues() {
115 return values;
116 }
117
118 //--- the field modifier methods (both instance and static)
119
120 @Override
121 public void setReferenceValue (int index, int newValue) {
122 values[index] = newValue;
123 }
124
125 @Override
126 public void setBooleanValue (int index, boolean newValue) {
127 values[index] = newValue ? 1 : 0;
128 }
129
130 @Override
131 public void setByteValue (int index, byte newValue) {
132 values[index] = newValue;
133 }
134
135 @Override
136 public void setCharValue (int index, char newValue) {
137 values[index] = newValue;
138 }
139
140 @Override
141 public void setShortValue (int index, short newValue) {
142 values[index] = newValue;
143 }
144
145 @Override
146 public void setFloatValue (int index, float newValue) {
147 values[index] = Types.floatToInt(newValue);
148 }
149
150 @Override
151 public void setIntValue (int index, int newValue) {
152 values[index] = newValue;
153 }
154
155 @Override
156 public void setLongValue (int index, long newValue) {
157 values[index++] = Types.hiLong(newValue);
158 values[index] = Types.loLong(newValue);
159 }
160
161 @Override
162 public void setDoubleValue (int index, double newValue) {
163 values[index++] = Types.hiDouble(newValue);
164 values[index] = Types.loDouble(newValue);
165 }
166
167
168 @Override
169 public float getFloatValue (int index) {
170 return Types.intToFloat(values[index]);
171 }
172
173 @Override
174 public double getDoubleValue (int index) {
175 return Types.intsToDouble( values[index+1], values[index]);
176 }
177
178 /**
179 * Creates a clone.
180 */
181 @Override
182 public NamedFields clone () {
183 NamedFields f = (NamedFields) cloneFields();
184 f.values = values.clone();
185 return f;
186 }
187
188 /**
189 * Checks for equality.
190 */
191 @Override
192 public boolean equals (Object o) {
193 if (o instanceof NamedFields) {
194 NamedFields other = (NamedFields) o;
195
196 //--- check values
197 int[] v1 = values;
198 int[] v2 = other.values;
199 int l = v1.length;
200 if (l != v2.length) {
201 return false;
202 }
203 for (int i = 0; i < l; i++) {
204 if (v1[i] != v2[i]) {
205 return false;
206 }
207 }
208
209 return super.compareAttrs(other);
210
211 } else {
212 return false;
213 }
214 }
215
216 // serialization interface
217 @Override
218 public void appendTo(IntVector v) {
219 v.append(values);
220 }
221
222
223 /**
224 * Adds some data to the computation of an hashcode.
225 */
226 @Override
227 public void hash (HashData hd) {
228 int[] v = values;
229 for (int i=0, l=v.length; i < l; i++) {
230 hd.add(v[i]);
231 }
232 }
233
234 /**
235 * Size of the fields.
236 */
237 public int size () {
238 return values.length;
239 }
240
241 @Override
242 public String toString () {
243 StringBuilder sb = new StringBuilder("NamedFields[");
244
245 sb.append("values=");
246 sb.append('[');
247
248 for (int i = 0; i < values.length; i++) {
249 if (i != 0) {
250 sb.append(',');
251 }
252
253 sb.append(values[i]);
254 }
255
256 sb.append(']');
257 sb.append(',');
258
259 sb.append(']');
260
261 return sb.toString();
262 }
263
264 // <2do> replace with copyTo() !!
265 public int[] getRawValues() {
266 return values;
267 }
268
269 public void copyFrom(Fields other) {
270 System.arraycopy(((NamedFields)other).values, 0, this.values, 0, values.length);
271 super.copyAttrs(other);
272 }
273
274 }