244 lines
8.9 KiB
Plaintext
244 lines
8.9 KiB
Plaintext
"use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.default = void 0;
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var _lang = require("../common/lang");
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var _error = _interopRequireDefault(require("./error"));
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function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
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function _typeof(o) { "@babel/helpers - typeof"; return _typeof = "function" == typeof Symbol && "symbol" == typeof Symbol.iterator ? function (o) { return typeof o; } : function (o) { return o && "function" == typeof Symbol && o.constructor === Symbol && o !== Symbol.prototype ? "symbol" : typeof o; }, _typeof(o); }
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function _slicedToArray(arr, i) { return _arrayWithHoles(arr) || _iterableToArrayLimit(arr, i) || _unsupportedIterableToArray(arr, i) || _nonIterableRest(); }
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function _nonIterableRest() { throw new TypeError("Invalid attempt to destructure non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); }
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function _unsupportedIterableToArray(o, minLen) { if (!o) return; if (typeof o === "string") return _arrayLikeToArray(o, minLen); var n = Object.prototype.toString.call(o).slice(8, -1); if (n === "Object" && o.constructor) n = o.constructor.name; if (n === "Map" || n === "Set") return Array.from(o); if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen); }
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function _arrayLikeToArray(arr, len) { if (len == null || len > arr.length) len = arr.length; for (var i = 0, arr2 = new Array(len); i < len; i++) arr2[i] = arr[i]; return arr2; }
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function _iterableToArrayLimit(r, l) { var t = null == r ? null : "undefined" != typeof Symbol && r[Symbol.iterator] || r["@@iterator"]; if (null != t) { var e, n, i, u, a = [], f = !0, o = !1; try { if (i = (t = t.call(r)).next, 0 === l) { if (Object(t) !== t) return; f = !1; } else for (; !(f = (e = i.call(t)).done) && (a.push(e.value), a.length !== l); f = !0); } catch (r) { o = !0, n = r; } finally { try { if (!f && null != t.return && (u = t.return(), Object(u) !== u)) return; } finally { if (o) throw n; } } return a; } }
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function _arrayWithHoles(arr) { if (Array.isArray(arr)) return arr; }
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function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
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function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, _toPropertyKey(descriptor.key), descriptor); } }
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function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); Object.defineProperty(Constructor, "prototype", { writable: false }); return Constructor; }
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function _toPropertyKey(t) { var i = _toPrimitive(t, "string"); return "symbol" == _typeof(i) ? i : i + ""; }
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function _toPrimitive(t, r) { if ("object" != _typeof(t) || !t) return t; var e = t[Symbol.toPrimitive]; if (void 0 !== e) { var i = e.call(t, r || "default"); if ("object" != _typeof(i)) return i; throw new TypeError("@@toPrimitive must return a primitive value."); } return ("string" === r ? String : Number)(t); } /**
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* @file 数据读取器
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* @author mengke01(kekee000@gmail.com)
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*
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* thanks to：
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* ynakajima/ttf.js
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* https://github.com/ynakajima/ttf.js
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*/
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// 检查数组支持情况
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if (typeof ArrayBuffer === 'undefined' || typeof DataView === 'undefined') {
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throw new Error('not support ArrayBuffer and DataView');
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}
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// 数据类型
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var dataType = {
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Int8: 1,
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Int16: 2,
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Int32: 4,
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Uint8: 1,
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Uint16: 2,
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Uint32: 4,
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Float32: 4,
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Float64: 8
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};
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var Reader = exports.default = /*#__PURE__*/function () {
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/**
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* 读取器
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*
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* @constructor
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* @param {Array.<byte>} buffer 缓冲数组
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* @param {number} offset 起始偏移
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* @param {number} length 数组长度
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* @param {boolean} littleEndian 是否小尾
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*/
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function Reader(buffer, offset, length, littleEndian) {
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_classCallCheck(this, Reader);
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var bufferLength = buffer.byteLength || buffer.length;
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this.offset = offset || 0;
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this.length = length || bufferLength - this.offset;
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this.littleEndian = littleEndian || false;
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this.view = new DataView(buffer, this.offset, this.length);
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}
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/**
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* 读取指定的数据类型
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*
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* @param {string} type 数据类型
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* @param {number=} offset 位移
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* @param {boolean=} littleEndian 是否小尾
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* @return {number} 返回值
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*/
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return _createClass(Reader, [{
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key: "read",
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value: function read(type, offset, littleEndian) {
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// 使用当前位移
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if (undefined === offset) {
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offset = this.offset;
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}
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// 使用小尾
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if (undefined === littleEndian) {
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littleEndian = this.littleEndian;
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}
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// 扩展方法
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if (undefined === dataType[type]) {
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return this['read' + type](offset, littleEndian);
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}
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var size = dataType[type];
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this.offset = offset + size;
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return this.view['get' + type](offset, littleEndian);
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}
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/**
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* 获取指定的字节数组
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*
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* @param {number} offset 偏移
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* @param {number} length 字节长度
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* @return {Array} 字节数组
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*/
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}, {
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key: "readBytes",
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value: function readBytes(offset) {
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var length = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : null;
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if (length == null) {
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length = offset;
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offset = this.offset;
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}
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if (length < 0 || offset + length > this.length) {
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_error.default.raise(10001, this.length, offset + length);
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}
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var buffer = [];
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for (var i = 0; i < length; ++i) {
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buffer.push(this.view.getUint8(offset + i));
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}
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this.offset = offset + length;
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return buffer;
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}
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/**
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* 读取一个string
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*
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* @param {number} offset 偏移
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* @param {number} length 长度
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* @return {string} 字符串
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*/
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}, {
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key: "readString",
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value: function readString(offset) {
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var length = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : null;
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if (length == null) {
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length = offset;
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offset = this.offset;
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}
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if (length < 0 || offset + length > this.length) {
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_error.default.raise(10001, this.length, offset + length);
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}
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var value = '';
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for (var i = 0; i < length; ++i) {
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var c = this.readUint8(offset + i);
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value += String.fromCharCode(c);
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}
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this.offset = offset + length;
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return value;
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}
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/**
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* 读取一个字符
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*
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* @param {number} offset 偏移
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* @return {string} 字符串
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*/
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}, {
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key: "readChar",
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value: function readChar(offset) {
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return this.readString(offset, 1);
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}
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/**
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* 读取一个uint24整形
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*
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* @param {number} offset 偏移
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* @return {number}
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*/
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}, {
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key: "readUint24",
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value: function readUint24(offset) {
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var _this$readBytes = this.readBytes(offset || this.offset, 3),
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_this$readBytes2 = _slicedToArray(_this$readBytes, 3),
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i = _this$readBytes2[0],
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j = _this$readBytes2[1],
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k = _this$readBytes2[2];
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return (i << 16) + (j << 8) + k;
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}
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/**
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* 读取fixed类型
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*
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* @param {number} offset 偏移
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* @return {number} float
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*/
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}, {
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key: "readFixed",
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value: function readFixed(offset) {
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if (undefined === offset) {
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offset = this.offset;
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}
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var val = this.readInt32(offset, false) / 65536.0;
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return Math.ceil(val * 100000) / 100000;
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}
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/**
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* 读取长日期
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*
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* @param {number} offset 偏移
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* @return {Date} Date对象
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*/
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}, {
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key: "readLongDateTime",
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value: function readLongDateTime(offset) {
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if (undefined === offset) {
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offset = this.offset;
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}
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// new Date(1970, 1, 1).getTime() - new Date(1904, 1, 1).getTime();
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var delta = -2077545600000;
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var time = this.readUint32(offset + 4, false);
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var date = new Date();
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date.setTime(time * 1000 + delta);
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return date;
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}
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/**
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* 跳转到指定偏移
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*
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* @param {number} offset 偏移
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* @return {Object} this
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*/
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}, {
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key: "seek",
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value: function seek(offset) {
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if (undefined === offset) {
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this.offset = 0;
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}
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if (offset < 0 || offset > this.length) {
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_error.default.raise(10001, this.length, offset);
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}
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this.offset = offset;
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return this;
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}
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/**
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* 注销
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*/
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}, {
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key: "dispose",
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value: function dispose() {
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delete this.view;
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}
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}]);
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}(); // 直接支持的数据类型
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Object.keys(dataType).forEach(function (type) {
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Reader.prototype['read' + type] = (0, _lang.curry)(Reader.prototype.read, type);
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}); |