112 lines
2.0 KiB
TypeScript
112 lines
2.0 KiB
TypeScript
export enum Unit {
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/** B */
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B = "B",
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/** KB */
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KB = "KB",
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/** MB */
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MB = "MB",
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/** GB */
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GB = "GB",
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/** TB */
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TB = "TB",
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/** PB */
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PB = "PB",
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/** EB */
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EB = "EB"
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}
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/** 储存单位 */
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export default class IOSize {
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/** 1 字节 */
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public static BYTE = 1;
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/** 1 KB */
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public static KB = IOSize.BYTE << 10;
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/** 1 MB */
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public static MB = IOSize.KB << 10;
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/** 1 GB */
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public static GB = IOSize.MB << 10;
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/** 1 TB */
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public static TB = IOSize.GB << 10;
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/** 1 PB */
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public static PB = IOSize.TB << 10;
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/** 1 EB */
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public static EB = IOSize.PB << 10;
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public static Unit = Unit;
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/**
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* <p>格式化一个储存容量，保留两位小数
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* <pre>
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* // 返回 100.01 KB
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* format(102411, 2);
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* </pre>
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*
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* @param size 字节大小
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* @param fixed 保留小数
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* @param stopUnit 停止单位
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* @return
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*/
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public static format(size: number, fixed = 2, stopUnit?: Unit): string {
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const units = Object.keys(Unit);
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if (0 < size) {
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for (let i = 0; i < units.length; i++, size /= 1024) {
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const unit = units[i];
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if (size <= 1000 || i === units.length - 1 || unit === stopUnit) {
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if (i === 0) {
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// 最小单位不需要小数
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return size + " B";
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} else {
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return `${size.toFixed(fixed)} ${unit}`;
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}
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}
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}
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}
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return "0 B";
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}
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/**
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* <p>格式化一个储存容量，保留两位小数，不带单位
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* <pre>
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* // 返回 100.01
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* format(102411, 2);
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* </pre>
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*
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* @param size 字节大小
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* @param fixed 保留小数
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* @param stopUnit 停止单位
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* @return
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*/
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public static formatWithoutUnit(size: number, fixed = 2, stopUnit?: Unit): string {
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const units = Object.keys(Unit);
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if (0 < size) {
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for (let i = 0; i < units.length; i++, size /= 1024) {
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const unit = units[i];
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if (size <= 1000 || i === units.length - 1 || unit === stopUnit) {
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if (i === 0) {
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// 最小单位不需要小数
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return size.toFixed(0);
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} else {
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return size.toFixed(fixed);
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}
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}
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}
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}
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return "0";
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}
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}
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