mirror of
https://github.com/pezkuwichain/pezkuwi-common.git
synced 2026-04-22 06:47:57 +00:00
24 lines
779 B
JavaScript
24 lines
779 B
JavaScript
export const REGEX_HEX_PREFIXED = /^0x[\da-fA-F]+$/;
|
|
export const REGEX_HEX_NOPREFIX = /^[\da-fA-F]+$/;
|
|
/**
|
|
* @name isHex
|
|
* @summary Tests for a hex string.
|
|
* @description
|
|
* Checks to see if the input value is a `0x` prefixed hex string. Optionally (`bitLength` !== -1) checks to see if the bitLength is correct.
|
|
* @example
|
|
* <BR>
|
|
*
|
|
* ```javascript
|
|
* import { isHex } from '@pezkuwi/util';
|
|
*
|
|
* isHex('0x1234'); // => true
|
|
* isHex('0x1234', 8); // => false
|
|
* ```
|
|
*/
|
|
export function isHex(value, bitLength = -1, ignoreLength) {
|
|
return (typeof value === 'string' && (value === '0x' ||
|
|
REGEX_HEX_PREFIXED.test(value))) && (bitLength === -1
|
|
? (ignoreLength || (value.length % 2 === 0))
|
|
: (value.length === (2 + Math.ceil(bitLength / 4))));
|
|
}
|