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
|
'use strict';
require('../common');
const assert = require('assert');
// Test (64 bit) double
const buffer = Buffer.allocUnsafe(8);
buffer[0] = 0x55;
buffer[1] = 0x55;
buffer[2] = 0x55;
buffer[3] = 0x55;
buffer[4] = 0x55;
buffer[5] = 0x55;
buffer[6] = 0xd5;
buffer[7] = 0x3f;
assert.strictEqual(buffer.readDoubleBE(0), 1.1945305291680097e+103);
assert.strictEqual(buffer.readDoubleLE(0), 0.3333333333333333);
buffer[0] = 1;
buffer[1] = 0;
buffer[2] = 0;
buffer[3] = 0;
buffer[4] = 0;
buffer[5] = 0;
buffer[6] = 0xf0;
buffer[7] = 0x3f;
assert.strictEqual(buffer.readDoubleBE(0), 7.291122019655968e-304);
assert.strictEqual(buffer.readDoubleLE(0), 1.0000000000000002);
buffer[0] = 2;
assert.strictEqual(buffer.readDoubleBE(0), 4.778309726801735e-299);
assert.strictEqual(buffer.readDoubleLE(0), 1.0000000000000004);
buffer[0] = 1;
buffer[6] = 0;
buffer[7] = 0;
assert.strictEqual(buffer.readDoubleBE(0), 7.291122019556398e-304);
assert.strictEqual(buffer.readDoubleLE(0), 5e-324);
buffer[0] = 0xff;
buffer[1] = 0xff;
buffer[2] = 0xff;
buffer[3] = 0xff;
buffer[4] = 0xff;
buffer[5] = 0xff;
buffer[6] = 0x0f;
buffer[7] = 0x00;
assert.ok(Number.isNaN(buffer.readDoubleBE(0)));
assert.strictEqual(buffer.readDoubleLE(0), 2.225073858507201e-308);
buffer[6] = 0xef;
buffer[7] = 0x7f;
assert.ok(Number.isNaN(buffer.readDoubleBE(0)));
assert.strictEqual(buffer.readDoubleLE(0), 1.7976931348623157e+308);
buffer[0] = 0;
buffer[1] = 0;
buffer[2] = 0;
buffer[3] = 0;
buffer[4] = 0;
buffer[5] = 0;
buffer[6] = 0xf0;
buffer[7] = 0x3f;
assert.strictEqual(buffer.readDoubleBE(0), 3.03865e-319);
assert.strictEqual(buffer.readDoubleLE(0), 1);
buffer[6] = 0;
buffer[7] = 0x40;
assert.strictEqual(buffer.readDoubleBE(0), 3.16e-322);
assert.strictEqual(buffer.readDoubleLE(0), 2);
buffer[7] = 0xc0;
assert.strictEqual(buffer.readDoubleBE(0), 9.5e-322);
assert.strictEqual(buffer.readDoubleLE(0), -2);
buffer[6] = 0x10;
buffer[7] = 0;
assert.strictEqual(buffer.readDoubleBE(0), 2.0237e-320);
assert.strictEqual(buffer.readDoubleLE(0), 2.2250738585072014e-308);
buffer[6] = 0;
assert.strictEqual(buffer.readDoubleBE(0), 0);
assert.strictEqual(buffer.readDoubleLE(0), 0);
assert.ok(1 / buffer.readDoubleLE(0) >= 0);
buffer[7] = 0x80;
assert.strictEqual(buffer.readDoubleBE(0), 6.3e-322);
assert.strictEqual(buffer.readDoubleLE(0), -0);
assert.ok(1 / buffer.readDoubleLE(0) < 0);
buffer[6] = 0xf0;
buffer[7] = 0x7f;
assert.strictEqual(buffer.readDoubleBE(0), 3.0418e-319);
assert.strictEqual(buffer.readDoubleLE(0), Infinity);
buffer[7] = 0xff;
assert.strictEqual(buffer.readDoubleBE(0), 3.04814e-319);
assert.strictEqual(buffer.readDoubleLE(0), -Infinity);
['readDoubleLE', 'readDoubleBE'].forEach((fn) => {
// Verify that default offset works fine.
buffer[fn](undefined);
buffer[fn]();
['', '0', null, {}, [], () => {}, true, false].forEach((off) => {
assert.throws(
() => buffer[fn](off),
{ code: 'ERR_INVALID_ARG_TYPE' }
);
});
[Infinity, -1, 1].forEach((offset) => {
assert.throws(
() => buffer[fn](offset),
{
code: 'ERR_OUT_OF_RANGE',
name: 'RangeError',
message: 'The value of "offset" is out of range. ' +
`It must be >= 0 and <= 0. Received ${offset}`
});
});
assert.throws(
() => Buffer.alloc(1)[fn](1),
{
code: 'ERR_BUFFER_OUT_OF_BOUNDS',
name: 'RangeError',
message: 'Attempt to access memory outside buffer bounds'
});
[NaN, 1.01].forEach((offset) => {
assert.throws(
() => buffer[fn](offset),
{
code: 'ERR_OUT_OF_RANGE',
name: 'RangeError',
message: 'The value of "offset" is out of range. ' +
`It must be an integer. Received ${offset}`
});
});
});
|
