source: trip-planner-front/node_modules/@webassemblyjs/floating-point-hex-parser/lib/index.js@ fa375fe

Last change on this file since fa375fe was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago

initial commit

  • Property mode set to 100644
File size: 1.2 KB
Line 
1"use strict";
2
3Object.defineProperty(exports, "__esModule", {
4 value: true
5});
6exports.default = parse;
7
8function parse(input) {
9 input = input.toUpperCase();
10 var splitIndex = input.indexOf("P");
11 var mantissa, exponent;
12
13 if (splitIndex !== -1) {
14 mantissa = input.substring(0, splitIndex);
15 exponent = parseInt(input.substring(splitIndex + 1));
16 } else {
17 mantissa = input;
18 exponent = 0;
19 }
20
21 var dotIndex = mantissa.indexOf(".");
22
23 if (dotIndex !== -1) {
24 var integerPart = parseInt(mantissa.substring(0, dotIndex), 16);
25 var sign = Math.sign(integerPart);
26 integerPart = sign * integerPart;
27 var fractionLength = mantissa.length - dotIndex - 1;
28 var fractionalPart = parseInt(mantissa.substring(dotIndex + 1), 16);
29 var fraction = fractionLength > 0 ? fractionalPart / Math.pow(16, fractionLength) : 0;
30
31 if (sign === 0) {
32 if (fraction === 0) {
33 mantissa = sign;
34 } else {
35 if (Object.is(sign, -0)) {
36 mantissa = -fraction;
37 } else {
38 mantissa = fraction;
39 }
40 }
41 } else {
42 mantissa = sign * (integerPart + fraction);
43 }
44 } else {
45 mantissa = parseInt(mantissa, 16);
46 }
47
48 return mantissa * (splitIndex !== -1 ? Math.pow(2, exponent) : 1);
49}
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