| 1 | 'use strict';
|
| 2 | var $ = require('../internals/export');
|
| 3 | var global = require('../internals/global');
|
| 4 | var uncurryThis = require('../internals/function-uncurry-this');
|
| 5 | var aString = require('../internals/a-string');
|
| 6 |
|
| 7 | var Uint8Array = global.Uint8Array;
|
| 8 | var SyntaxError = global.SyntaxError;
|
| 9 | var parseInt = global.parseInt;
|
| 10 | var NOT_HEX = /[^\da-f]/i;
|
| 11 | var exec = uncurryThis(NOT_HEX.exec);
|
| 12 | var stringSlice = uncurryThis(''.slice);
|
| 13 |
|
| 14 |
|
| 15 |
|
| 16 | if (Uint8Array) $({ target: 'Uint8Array', stat: true, forced: true }, {
|
| 17 | fromHex: function fromHex(string) {
|
| 18 | aString(string);
|
| 19 | var stringLength = string.length;
|
| 20 | if (stringLength % 2) throw new SyntaxError('String should have an even number of characters');
|
| 21 | if (exec(NOT_HEX, string)) throw new SyntaxError('String should only contain hex characters');
|
| 22 | var result = new Uint8Array(stringLength / 2);
|
| 23 | for (var i = 0; i < stringLength; i += 2) {
|
| 24 | result[i / 2] = parseInt(stringSlice(string, i, i + 2), 16);
|
| 25 | }
|
| 26 | return result;
|
| 27 | }
|
| 28 | });
|