Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 | 23x 23x 23x 23x 23x 23x 23x 23x 31x 11x 11x 1x 10x 10x 10x 10x 20x 12x 11x 10x 10x 1x 9x 1x 1x 8x 20x | const _b = 1
const _kb = _b * 1024
const _mb = _kb * 1024
const _gb = _mb * 1024
const _tb = _gb * 1024
const _pb = _tb * 1024
export type BytesUnit = 'PB' | 'TB' | 'GB' | 'MB' | 'KB' | 'B'
export type BytesNumberValue = number
export type BytesStringValue = `${number}${BytesUnit}`
export type BytesValue = BytesNumberValue | BytesStringValue
const unitToBytes: Record<BytesUnit, number> = Object.create({
PB: _pb,
TB: _tb,
GB: _gb,
MB: _mb,
KB: _kb,
B: _b,
})
const re = /^(\d+(?:\.\d+)?)(PB|TB|GB|MB|KB|B)$/
/**
* 获取字节值。
*
* @param value 值
* @param unit 单位
*/
export function bytes(value: number, unit: BytesUnit): number
/**
* 获取字节值。
*
* @param value 值
*/
export function bytes(value: BytesValue): number
export function bytes(value: BytesValue, unit?: BytesUnit): number {
let bytesValue!: number
if (typeof value === 'string' && value.length > 0) {
const match = re.exec(value)
if (!match) {
throw new TypeError(`value 值非法: value=${JSON.stringify(value)}`)
}
const v = parseFloat(match[1])
const u: BytesUnit = match[2] as any
const t = unitToBytes[u]
bytesValue = v * t
} else if (typeof value === 'number' && isFinite(value)) {
if (unit != null) {
if (typeof unit === 'string') {
const t = unitToBytes[unit]
if (!t) {
throw new TypeError(`unit 值非法: unit=${JSON.stringify(unit)}`)
}
bytesValue = value * t
} else {
throw new TypeError('unit 必须是一个字符串')
}
} else {
bytesValue = value
}
} else {
throw new TypeError('value 必须是字符串或数字')
}
return bytesValue
}
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