1 /*
2 * Copyright (c) 2003, 2011, 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.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24 /*
25 * @test
26 * @bug 4826774
27 * @summary Numerical tests for hexadecimal inputs to parseDouble, parseFloat
28 * @author Joseph D. Darcy
29 */
30
31
32 import java.util.regex.*;
33
34 public class ParseHexFloatingPoint {
35 private ParseHexFloatingPoint(){}
36
37 public static final double infinityD = Double.POSITIVE_INFINITY;
38 public static final double NaND = Double.NaN;
39
40 static int test(String testName, String input,
41 double result, double expected) {
42 int failures =0;
43
44 if (Double.compare(result, expected) != 0 ) {
45 System.err.println("Failure for " + testName +
46 ": For input " + input +
47 " expected " + expected +
48 " got " + result + ".");
49 }
50
51 return failures;
52 }
53
238 new PairSD("0x1.fffffffffffff4p1023", Double.MAX_VALUE),
239 new PairSD("0x1.fffffffffffff7fffffp1023", Double.MAX_VALUE),
240 new PairSD("0x1.fffffffffffff8p1023", infinityD),
241 new PairSD("0x1.fffffffffffff8000001p1023", infinityD),
242
243 new PairSD("0x1.ffffffffffffep1023", Math.nextDown(Double.MAX_VALUE)),
244 new PairSD("0x1.ffffffffffffe0000p1023", Math.nextDown(Double.MAX_VALUE)),
245 new PairSD("0x1.ffffffffffffe8p1023", Math.nextDown(Double.MAX_VALUE)),
246 new PairSD("0x1.ffffffffffffe7p1023", Math.nextDown(Double.MAX_VALUE)),
247 new PairSD("0x1.ffffffffffffeffffffp1023", Double.MAX_VALUE),
248 new PairSD("0x1.ffffffffffffe8000001p1023", Double.MAX_VALUE),
249 };
250
251 for (int i = 0; i < testCases.length; i++) {
252 failures += testCase(testCases[i].s,testCases[i].d);
253 }
254
255 failures += significandAlignmentTests();
256
257 {
258 java.util.Random rand = new java.util.Random();
259 // Consistency check; double => hexadecimal => double
260 // preserves the original value.
261 for(int i = 0; i < 1000; i++) {
262 double d = rand.nextDouble();
263 failures += testCase(Double.toHexString(d), d);
264 }
265 }
266
267 return failures;
268 }
269
270 /*
271 * Verify rounding works the same regardless of how the
272 * significand is aligned on input. A useful extension could be
273 * to have this sort of test for strings near the overflow
274 * threshold.
275 */
276 static int significandAlignmentTests() {
277 int failures = 0;
278 // baseSignif * 2^baseExp = nextDown(2.0)
|
1 /*
2 * Copyright (c) 2003, 2015, 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.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24 /*
25 * @test
26 * @library ..
27 * @bug 4826774 8078586
28 * @summary Numerical tests for hexadecimal inputs to parseDouble, parseFloat
29 * @author Joseph D. Darcy
30 */
31
32 public class ParseHexFloatingPoint {
33 private ParseHexFloatingPoint(){}
34
35 public static final double infinityD = Double.POSITIVE_INFINITY;
36 public static final double NaND = Double.NaN;
37
38 static int test(String testName, String input,
39 double result, double expected) {
40 int failures =0;
41
42 if (Double.compare(result, expected) != 0 ) {
43 System.err.println("Failure for " + testName +
44 ": For input " + input +
45 " expected " + expected +
46 " got " + result + ".");
47 }
48
49 return failures;
50 }
51
236 new PairSD("0x1.fffffffffffff4p1023", Double.MAX_VALUE),
237 new PairSD("0x1.fffffffffffff7fffffp1023", Double.MAX_VALUE),
238 new PairSD("0x1.fffffffffffff8p1023", infinityD),
239 new PairSD("0x1.fffffffffffff8000001p1023", infinityD),
240
241 new PairSD("0x1.ffffffffffffep1023", Math.nextDown(Double.MAX_VALUE)),
242 new PairSD("0x1.ffffffffffffe0000p1023", Math.nextDown(Double.MAX_VALUE)),
243 new PairSD("0x1.ffffffffffffe8p1023", Math.nextDown(Double.MAX_VALUE)),
244 new PairSD("0x1.ffffffffffffe7p1023", Math.nextDown(Double.MAX_VALUE)),
245 new PairSD("0x1.ffffffffffffeffffffp1023", Double.MAX_VALUE),
246 new PairSD("0x1.ffffffffffffe8000001p1023", Double.MAX_VALUE),
247 };
248
249 for (int i = 0; i < testCases.length; i++) {
250 failures += testCase(testCases[i].s,testCases[i].d);
251 }
252
253 failures += significandAlignmentTests();
254
255 {
256 long seed = RandomSeedFactory.getSeed();
257 java.util.Random rand = new java.util.Random(seed);
258 // Consistency check; double => hexadecimal => double
259 // preserves the original value.
260 for(int i = 0; i < 1000; i++) {
261 double d = rand.nextDouble();
262 failures += testCase(Double.toHexString(d), d);
263 }
264 }
265
266 return failures;
267 }
268
269 /*
270 * Verify rounding works the same regardless of how the
271 * significand is aligned on input. A useful extension could be
272 * to have this sort of test for strings near the overflow
273 * threshold.
274 */
275 static int significandAlignmentTests() {
276 int failures = 0;
277 // baseSignif * 2^baseExp = nextDown(2.0)
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