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
// deno-fmt-ignore-file// deno-lint-ignore-file
// Copyright Joyent and Node contributors. All rights reserved. MIT license.// Taken from Node 18.12.0// This file is automatically generated by "node/_tools/setup.ts". Do not modify this file manually
'use strict';
require('../common');const assert = require('assert');
// Test (64 bit) doubleconst 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;// eslint-disable-next-line no-loss-of-precisionassert.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}`      });  });});