mirror of
https://github.com/pezkuwichain/pezkuwi-common.git
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Satoshi Qazi MuhammedandClaude Opus 5.5
bebfcee609
The header rule takes the current year as the end of the range, as upstream's does; 581 sources still ended at 2025, which failed lint. Lint never ran to completion here, so this went unseen. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
37 lines
988 B
TypeScript
37 lines
988 B
TypeScript
// Copyright 2017-2026 @pezkuwi/util authors & contributors
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// SPDX-License-Identifier: Apache-2.0
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import type { HexString } from '../types.js';
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export const REGEX_HEX_PREFIXED = /^0x[\da-fA-F]+$/;
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export const REGEX_HEX_NOPREFIX = /^[\da-fA-F]+$/;
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/**
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* @name isHex
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* @summary Tests for a hex string.
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* @description
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* Checks to see if the input value is a `0x` prefixed hex string. Optionally (`bitLength` !== -1) checks to see if the bitLength is correct.
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* @example
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* <BR>
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*
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* ```javascript
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* import { isHex } from '@pezkuwi/util';
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*
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* isHex('0x1234'); // => true
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* isHex('0x1234', 8); // => false
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* ```
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*/
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export function isHex (value: unknown, bitLength = -1, ignoreLength?: boolean): value is HexString {
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return (
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typeof value === 'string' && (
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value === '0x' ||
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REGEX_HEX_PREFIXED.test(value)
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)
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) && (
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bitLength === -1
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? (ignoreLength || (value.length % 2 === 0))
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: (value.length === (2 + Math.ceil(bitLength / 4)))
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);
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}
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