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
|
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim: set ts=8 sts=2 et sw=2 tw=80:
*/
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "mozilla/FloatingPoint.h" // mozilla::{PositiveInfinity,UnspecifiedNaN}
#include <stddef.h> // size_t
#include <string.h> // memcmp, memset
#include "js/Conversions.h" // JS::NumberToString, JS::MaximumNumberToStringLength
#include "jsapi-tests/tests.h" // BEGIN_TEST, CHECK_EQUAL, END_TEST
#include "util/Text.h" // js_strlen
#define REST(x) x, (js_strlen(x)), __LINE__
static const struct NumberToStringTest {
double number;
const char* expected;
size_t expectedLength;
size_t lineno;
} numberToStringTests[] = {
{5e-324, REST("5e-324")}, // 2**-1074
{9.5367431640625e-7, REST("9.5367431640625e-7")}, // 2**-20
{0.0000010984284297360395, REST("0.0000010984284297360395")},
{0.0000019073486328125, REST("0.0000019073486328125")}, // 2**-19
{0.000003814697265625, REST("0.000003814697265625")}, // 2**-18
{0.0000057220458984375, REST("0.0000057220458984375")}, // 2**-18 + 2**-19
{0.000244140625, REST("0.000244140625")}, // 2**-12
{0.125, REST("0.125")},
{0.25, REST("0.25")},
{0.5, REST("0.5")},
{1, REST("1")},
{1.5, REST("1.5")},
{2, REST("2")},
{9, REST("9")},
{10, REST("10")},
{15, REST("15")},
{16, REST("16")},
{389427, REST("389427")},
{1073741823, REST("1073741823")},
{1073741824, REST("1073741824")},
{1073741825, REST("1073741825")},
{2147483647, REST("2147483647")},
{2147483648, REST("2147483648")},
{2147483649, REST("2147483649")},
{4294967294, REST("4294967294")},
{4294967295, REST("4294967295")},
{4294967296, REST("4294967296")},
{999999999999999900000.0, REST("999999999999999900000")},
{999999999999999900000.0 + 65535, REST("999999999999999900000")},
{999999999999999900000.0 + 65536, REST("1e+21")},
{1.7976931348623157e+308, REST("1.7976931348623157e+308")}, // MAX_VALUE
};
static constexpr char PoisonChar = 0x37;
struct StorageForNumberToString {
char out[JS::MaximumNumberToStringLength];
char overflow;
} storage;
BEGIN_TEST(testNumberToString) {
StorageForNumberToString storage;
if (!testNormalValues(false, storage)) {
return false;
}
if (!testNormalValues(true, storage)) {
return false;
}
NumberToStringTest zeroTest = {0.0, REST("0")};
if (!testOne(zeroTest, false, storage)) {
return false;
}
NumberToStringTest negativeZeroTest = {-0.0, REST("0")};
if (!testOne(negativeZeroTest, false, storage)) {
return false;
}
NumberToStringTest infTest = {mozilla::PositiveInfinity<double>(),
REST("Infinity")};
if (!testOne(infTest, false, storage)) {
return false;
}
if (!testOne(infTest, true, storage)) {
return false;
}
NumberToStringTest nanTest = {mozilla::UnspecifiedNaN<double>(), REST("NaN")};
return testOne(nanTest, false, storage);
}
bool testNormalValues(bool hasMinusSign, StorageForNumberToString& storage) {
for (const auto& test : numberToStringTests) {
if (!testOne(test, hasMinusSign, storage)) {
return false;
}
}
return true;
}
bool testOne(const NumberToStringTest& test, bool hasMinusSign,
StorageForNumberToString& storage) {
memset(&storage, PoisonChar, sizeof(storage));
JS::NumberToString(hasMinusSign ? -test.number : test.number, storage.out);
CHECK_EQUAL(storage.overflow, PoisonChar);
const char* start = storage.out;
if (hasMinusSign) {
CHECK_EQUAL(start[0], '-');
start++;
}
if (!checkEqual(memcmp(start, test.expected, test.expectedLength), 0, start,
test.expected, __FILE__, test.lineno)) {
return false;
}
char actualTerminator[] = {start[test.expectedLength], '\0'};
return checkEqual(actualTerminator[0], '\0', actualTerminator, "'\\0'",
__FILE__, test.lineno);
}
END_TEST(testNumberToString)
#undef REST
|
