1 /*
2 * Copyright 1999-2005 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 */
23
24 /*
25 * @test
26 * @bug 4103117 4331084 4488017 4490929 6255285 6268365
27 * @summary Tests the BigDecimal string constructor.
28 */
29
30 import java.math.*;
31 import java.util.Random;
32
33 public class StringConstructor {
34
35 private static int seed = new Random().nextInt();
36 private static Random rnd = new Random(seed);
37
38 public static void main(String[] args) throws Exception {
39 constructWithError("");
40 constructWithError("+");
41 constructWithError("-");
42 constructWithError("+e");
43 constructWithError("-e");
44 constructWithError("e+");
45 constructWithError("1.-0");
46 constructWithError(".-123");
47 constructWithError("-");
48 constructWithError("--1.1");
49 constructWithError("-+1.1");
50 constructWithError("+-1.1");
51 constructWithError("1-.1");
52 constructWithError("1+.1");
53 constructWithError("1.111+1");
54 constructWithError("1.111-1");
55 constructWithError("11.e+");
56 constructWithError("11.e-");
57 constructWithError("11.e+-");
58 constructWithError("11.e-+");
59 constructWithError("11.e-+1");
60 constructWithError("11.e+-1");
61
62 // Range checks
63 constructWithError("1e"+Integer.MIN_VALUE);
64 constructWithError("10e"+Integer.MIN_VALUE);
65 constructWithError("0.01e"+Integer.MIN_VALUE);
66 constructWithError("1e"+((long)Integer.MIN_VALUE-1));
67 constructWithError("1e"+((long)Integer.MAX_VALUE + 1));
68
69 leadingExponentZeroTest();
70 nonAsciiZeroTest();
71
72 // Roundtrip tests
73 for (int i=0; i<100; i++) {
74 int size = rnd.nextInt(100) + 1;
75 BigInteger bi = new BigInteger(size, rnd);
76 if (rnd.nextBoolean())
77 bi = bi.negate();
78 int decimalLength = bi.toString().length();
79 int scale = rnd.nextInt(decimalLength);
80 BigDecimal bd = new BigDecimal(bi, scale);
81 String bdString = bd.toString();
82 // System.err.println("bi" + bi.toString() + "\tscale " + scale);
83 // System.err.println("bd string: " + bdString);
84 BigDecimal bdDoppel = new BigDecimal(bdString);
85 if (!bd.equals(bdDoppel)) {
86 System.err.println("Random number seed = " + seed);
87 System.err.println("bd string: scale: " + bd.scale() +
88 "\t" + bdString);
89 System.err.println("bd doppel: scale: " + bdDoppel.scale() +
90 "\t" + bdDoppel.toString());
91 throw new RuntimeException("String constructor failure.");
92 }
93 }
94 }
95
96
97 /*
98 * Verify precision is set properly if the significand has
99 * non-ASCII leading zeros.
100 */
101 private static void nonAsciiZeroTest() {
102 String values[] = {
103 "00004e5",
104 "\u0660\u0660\u0660\u06604e5",
105 };
106
107 BigDecimal expected = new BigDecimal("4e5");
108
109 for(String s : values) {
110 BigDecimal tmp = new BigDecimal(s);
111 // System.err.println("Testing " + s);
112 if (! expected.equals(tmp) || tmp.precision() != 1) {
113 System.err.println("Bad conversion of " + s + "got " +
114 tmp + "precision = " + tmp.precision());
115 throw new RuntimeException("String constructor failure.");
116 }
117 }
118
119 }
120
121 private static void leadingExponentZeroTest() {
122 BigDecimal twelve = new BigDecimal("12");
123 BigDecimal onePointTwo = new BigDecimal("1.2");
124
125 String start = "1.2e0";
126 String end = "1";
127 String middle = "";
128
129 // Test with more excess zeros than the largest number of
130 // decimal digits needed to represent a long
131 int limit = ((int)Math.log10(Long.MAX_VALUE)) + 6;
132 for(int i = 0; i < limit; i++, middle += "0") {
133 String t1 = start + middle;
134 String t2 = t1 + end;
135
136 // System.out.println(i + "\t" + t1 + "\t" + t2);
137 testString(t1, onePointTwo);
138 testString(t2, twelve);
139 }
140 }
141
142 private static void testString(String s, BigDecimal expected) {
143 testString0(s, expected);
144 testString0(switchZero(s), expected);
145 }
146
147 private static void testString0(String s, BigDecimal expected) {
148 if (!expected.equals(new BigDecimal(s)))
149 throw new RuntimeException(s + " is not equal to " + expected);
150 }
151
152 private static String switchZero(String s) {
153 return s.replace('0', '\u0660'); // Arabic-Indic zero
154 }
155
156 private static void constructWithError(String badString) {
157 try {
158 BigDecimal d = new BigDecimal(badString);
159 throw new RuntimeException(badString + " accepted");
160 } catch(NumberFormatException e) {
161 }
162 }
163 }