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127 lines
2.6 KiB
127 lines
2.6 KiB
//表示全局唯一标识符 (GUID)。
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function Guid(g) {
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var arr = new Array(); //存放32位数值的数组
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if (typeof (g) == "string") { //如果构造函数的参数为字符串
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InitByString(arr, g);
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}
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else {
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InitByOther(arr);
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}
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//返回一个值，该值指示 Guid 的两个实例是否表示同一个值。
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this.Equals = function (o) {
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if (o && o.IsGuid) {
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return this.ToString() == o.ToString();
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}
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else {
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return false;
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}
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}
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//Guid对象的标记
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this.IsGuid = function () { }
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//返回 Guid 类的此实例值的 String 表示形式。
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this.ToString = function (format) {
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if (typeof (format) == "string") {
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if (format == "N" || format == "D" || format == "B" || format == "P") {
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return ToStringWithFormat(arr, format);
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}
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else {
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return ToStringWithFormat(arr, "D");
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}
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}
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else {
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return ToStringWithFormat(arr, "D");
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}
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}
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//由字符串加载
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function InitByString(arr, g) {
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g = g.replace(/\{|\(|\)|\}|-/g, "");
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g = g.toLowerCase();
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if (g.length != 32 || g.search(/[^0-9,a-f]/i) != -1) {
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InitByOther(arr);
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}
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else {
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for (var i = 0; i < g.length; i++) {
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arr.push(g[i]);
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}
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}
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}
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//由其他类型加载
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function InitByOther(arr) {
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var i = 32;
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while (i--) {
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arr.push("0");
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}
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}
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function ToStringWithFormat(arr, format) {
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switch (format) {
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case "N":
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return arr.toString().replace(/,/g, "");
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case "D":
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var str = arr.slice(0, 8) + "-" + arr.slice(8, 12) + "-" + arr.slice(12, 16) + "-" + arr.slice(16, 20) + "-" + arr.slice(20, 32);
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str = str.replace(/,/g, "");
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return str;
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case "B":
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var str = ToStringWithFormat(arr, "D");
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str = "{" + str + "}";
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return str;
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case "P":
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var str = ToStringWithFormat(arr, "D");
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str = "(" + str + ")";
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return str;
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default:
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return new Guid();
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}
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}
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}
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//Guid 类的默认实例，其值保证均为零。
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Guid.Empty = new Guid();
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//初始化 Guid 类的一个新实例。
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Guid.NewGuid = function () {
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var g = "";
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var i = 32;
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while (i--) {
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g += Math.floor(Math.random() * 16.0).toString(16);
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}
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return new Guid(g);
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}
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