30 lines
699 B
JavaScript
30 lines
699 B
JavaScript
'use strict';
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var MAX_SAFE_INTEGER = 0x1fffffffffffff; // 2 ^ 53 - 1
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var utils = {};
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utils.isHash = function isHash(value) {
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return typeof value === 'string' && value.length === 64 && /^[0-9a-fA-F]+$/.test(value);
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};
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utils.isSafeNatural = function isSafeNatural(value) {
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return typeof value === 'number' &&
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isFinite(value) &&
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Math.floor(value) === value &&
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value >= 0 &&
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value <= MAX_SAFE_INTEGER;
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};
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utils.startAtZero = function startAtZero(obj, key) {
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if (!obj.hasOwnProperty(key)) {
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obj[key] = 0;
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}
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};
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utils.isAbsolutePath = require('path').isAbsolute;
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if (!utils.isAbsolutePath) {
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utils.isAbsolutePath = require('path-is-absolute');
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}
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module.exports = utils;
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