42 lines
947 B
JavaScript
42 lines
947 B
JavaScript
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/**
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* Parse byte `size` string.
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*
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* @param {String} size
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* @return {Number}
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* @api public
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*/
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module.exports = function(size) {
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if ('number' == typeof size) return convert(size);
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var parts = size.match(/^(\d+(?:\.\d+)?) *(kb|mb|gb|tb)$/)
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, n = parseFloat(parts[1])
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, type = parts[2];
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var map = {
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kb: 1 << 10
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, mb: 1 << 20
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, gb: 1 << 30
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, tb: ((1 << 30) * 1024)
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};
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return map[type] * n;
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};
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/**
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* convert bytes into string.
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*
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* @param {Number} b - bytes to convert
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* @return {String}
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* @api public
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*/
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function convert (b) {
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var tb = ((1 << 30) * 1024), gb = 1 << 30, mb = 1 << 20, kb = 1 << 10, abs = Math.abs(b);
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if (abs >= tb) return (Math.round(b / tb * 100) / 100) + 'tb';
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if (abs >= gb) return (Math.round(b / gb * 100) / 100) + 'gb';
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if (abs >= mb) return (Math.round(b / mb * 100) / 100) + 'mb';
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if (abs >= kb) return (Math.round(b / kb * 100) / 100) + 'kb';
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return b + 'b';
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}
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