1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
|
# -*- mode: perl; -*-
use strict;
use warnings;
use Test::More tests => 792;
use Math::BigInt;
while (<DATA>) {
s/#.*$//; # remove comments
s/\s+$//; # remove trailing whitespace
next unless length; # skip empty lines
my ($x_str, $mant_str, $expo_str) = split /:/;
note(qq|\n\$x = Math::BigInt -> new("$x_str");|,
qq| (\$m, \$e) = \$x -> sparts();\n\n|);
{
my $x = Math::BigInt -> new($x_str);
my ($mant_got, $expo_got) = $x -> sparts();
isa_ok($mant_got, "Math::BigInt");
isa_ok($expo_got, "Math::BigInt");
is($mant_got, $mant_str, "value of mantissa");
is($expo_got, $expo_str, "value of exponent");
is($x, $x_str, "input is unmodified");
}
note(qq|\n\$x = Math::BigInt -> new("$x_str");|,
qq| \$m = \$x -> sparts();\n\n|);
{
my $x = Math::BigInt -> new($x_str);
my $mant_got = $x -> sparts();
isa_ok($mant_got, "Math::BigInt");
is($mant_got, $mant_str, "value of mantissa");
is($x, $x_str, "input is unmodified");
}
}
# Verify that the accuracy of the significand and the exponent depends on the
# accuracy of the invocand, if set, not the class.
note(qq|\nVerify that accuracy depends on invocand, not class.\n\n|);
{
Math::BigInt -> accuracy(20);
my $x = Math::BigInt -> new("3"); # accuracy is 20
$x -> accuracy(10); # reduce accuracy to 10
my ($mant, $expo) = $x -> sparts();
cmp_ok($mant, '==', 3, "value of significand");
cmp_ok($expo, '==', 0, "value of exponent");
cmp_ok($mant -> accuracy(), '==', 10, "accuracy of significand");
cmp_ok($expo -> accuracy(), '==', 20, "accuracy of exponent");
}
note(qq|\nVerify that precision depends on invocand, not class.\n\n|);
{
Math::BigInt -> precision(20);
my $x = Math::BigInt -> new("3"); # precision is 20
$x -> precision(10); # reduce precision to 10
my ($mant, $expo) = $x -> sparts();
cmp_ok($mant, '==', 3, "value of significand");
cmp_ok($expo, '==', 0, "value of exponent");
cmp_ok($mant -> precision(), '==', 10, "precision of significand");
cmp_ok($expo -> precision(), '==', 20, "precision of exponent");
}
__DATA__
NaN:NaN:NaN
inf:inf:inf
-inf:-inf:inf
0:0:0
# positive numbers
1:1:0
10:1:1
100:1:2
1000:1:3
10000:1:4
100000:1:5
1000000:1:6
10000000:1:7
100000000:1:8
1000000000:1:9
10000000000:1:10
100000000000:1:11
1000000000000:1:12
12:12:0
120:12:1
1200:12:2
12000:12:3
120000:12:4
1200000:12:5
12000000:12:6
120000000:12:7
1200000000:12:8
12000000000:12:9
120000000000:12:10
1200000000000:12:11
123:123:0
1230:123:1
12300:123:2
123000:123:3
1230000:123:4
12300000:123:5
123000000:123:6
1230000000:123:7
12300000000:123:8
123000000000:123:9
1230000000000:123:10
1234:1234:0
12340:1234:1
123400:1234:2
1234000:1234:3
12340000:1234:4
123400000:1234:5
1234000000:1234:6
12340000000:1234:7
123400000000:1234:8
1234000000000:1234:9
3141592:3141592:0
# negativ: numbers
-1:-1:0
-10:-1:1
-100:-1:2
-1000:-1:3
-10000:-1:4
-100000:-1:5
-1000000:-1:6
-10000000:-1:7
-100000000:-1:8
-1000000000:-1:9
-10000000000:-1:10
-100000000000:-1:11
-1000000000000:-1:12
-12:-12:0
-120:-12:1
-1200:-12:2
-12000:-12:3
-120000:-12:4
-1200000:-12:5
-12000000:-12:6
-120000000:-12:7
-1200000000:-12:8
-12000000000:-12:9
-120000000000:-12:10
-1200000000000:-12:11
-123:-123:0
-1230:-123:1
-12300:-123:2
-123000:-123:3
-1230000:-123:4
-12300000:-123:5
-123000000:-123:6
-1230000000:-123:7
-12300000000:-123:8
-123000000000:-123:9
-1230000000000:-123:10
-1234:-1234:0
-12340:-1234:1
-123400:-1234:2
-1234000:-1234:3
-12340000:-1234:4
-123400000:-1234:5
-1234000000:-1234:6
-12340000000:-1234:7
-123400000000:-1234:8
-1234000000000:-1234:9
-3141592:-3141592:0
|
