src/assets/js/tar.js

/*
 Copyright 2020 TATA ELXSI

 Licensed under the Apache License, Version 2.0 (the 'License');
 you may not use this file except in compliance with the License.
 You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

 Unless required by applicable law or agreed to in writing, software
 distributed under the License is distributed on an "AS IS" BASIS,
 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.

 Author: KUMARAN M (kumaran.m@tataelxsi.co.in), RAJESH S (rajesh.s@tataelxsi.co.in), BARATH KUMAR R (barath.r@tataelxsi.co.in)
 */
var Tar =
/******/ (function(modules) { // webpackBootstrap
/******/ 	// The module cache
/******/ 	var installedModules = {};
/******/
/******/ 	// The require function
/******/ 	function __webpack_require__(moduleId) {
/******/
/******/ 		// Check if module is in cache
/******/ 		if(installedModules[moduleId]) {
/******/ 			return installedModules[moduleId].exports;
/******/ 		}
/******/ 		// Create a new module (and put it into the cache)
/******/ 		var module = installedModules[moduleId] = {
/******/ 			i: moduleId,
/******/ 			l: false,
/******/ 			exports: {}
/******/ 		};
/******/
/******/ 		// Execute the module function
/******/ 		modules[moduleId].call(module.exports, module, module.exports, __webpack_require__);
/******/
/******/ 		// Flag the module as loaded
/******/ 		module.l = true;
/******/
/******/ 		// Return the exports of the module
/******/ 		return module.exports;
/******/ 	}
/******/
/******/
/******/ 	// expose the modules object (__webpack_modules__)
/******/ 	__webpack_require__.m = modules;
/******/
/******/ 	// expose the module cache
/******/ 	__webpack_require__.c = installedModules;
/******/
/******/ 	// identity function for calling harmony imports with the correct context
/******/ 	__webpack_require__.i = function(value) { return value; };
/******/
/******/ 	// define getter function for harmony exports
/******/ 	__webpack_require__.d = function(exports, name, getter) {
/******/ 		if(!__webpack_require__.o(exports, name)) {
/******/ 			Object.defineProperty(exports, name, {
/******/ 				configurable: false,
/******/ 				enumerable: true,
/******/ 				get: getter
/******/ 			});
/******/ 		}
/******/ 	};
/******/
/******/ 	// getDefaultExport function for compatibility with non-harmony modules
/******/ 	__webpack_require__.n = function(module) {
/******/ 		var getter = module && module.__esModule ?
/******/ 			function getDefault() { return module['default']; } :
/******/ 			function getModuleExports() { return module; };
/******/ 		__webpack_require__.d(getter, 'a', getter);
/******/ 		return getter;
/******/ 	};
/******/
/******/ 	// Object.prototype.hasOwnProperty.call
/******/ 	__webpack_require__.o = function(object, property) { return Object.prototype.hasOwnProperty.call(object, property); };
/******/
/******/ 	// __webpack_public_path__
/******/ 	__webpack_require__.p = "";
/******/
/******/ 	// Load entry module and return exports
/******/ 	return __webpack_require__(__webpack_require__.s = 2);
/******/ })
/************************************************************************/
/******/ ([
/* 0 */
/***/ (function(module, exports) {

/*
 * tar-js
 * MIT (c) 2011 T. Jameson Little
 */

(function () {
	"use strict";

	var lookup = [
			'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H',
			'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P',
			'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X',
			'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f',
			'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n',
			'o', 'p', 'q', 'r', 's', 't', 'u', 'v',
			'w', 'x', 'y', 'z', '0', '1', '2', '3',
			'4', '5', '6', '7', '8', '9', '+', '/'
		];
	function clean(length) {
		var i, buffer = new Uint8Array(length);
		for (i = 0; i < length; i += 1) {
			buffer[i] = 0;
		}
		return buffer;
	}

	function extend(orig, length, addLength, multipleOf) {
		var newSize = length + addLength,
			buffer = clean((parseInt(newSize / multipleOf) + 1) * multipleOf);

		buffer.set(orig);

		return buffer;
	}

	function pad(num, bytes, base) {
		num = num.toString(base || 8);
		return "000000000000".substr(num.length + 12 - bytes) + num;
	}	
	
	function stringToUint8 (input, out, offset) {
		var i, length;

		out = out || clean(input.length);

		offset = offset || 0;
		for (i = 0, length = input.length; i < length; i += 1) {
			out[offset] = input.charCodeAt(i);
			offset += 1;
		}

		return out;
	}

	function uint8ToBase64(uint8) {
		var i,
			extraBytes = uint8.length % 3, // if we have 1 byte left, pad 2 bytes
			output = "",
			temp, length;

		function tripletToBase64 (num) {
			return lookup[num >> 18 & 0x3F] + lookup[num >> 12 & 0x3F] + lookup[num >> 6 & 0x3F] + lookup[num & 0x3F];
		};

		// go through the array every three bytes, we'll deal with trailing stuff later
		for (i = 0, length = uint8.length - extraBytes; i < length; i += 3) {
			temp = (uint8[i] << 16) + (uint8[i + 1] << 8) + (uint8[i + 2]);
			output += tripletToBase64(temp);
		}

		// this prevents an ERR_INVALID_URL in Chrome (Firefox okay)
		switch (output.length % 4) {
			case 1:
				output += '=';
				break;
			case 2:
				output += '==';
				break;
			default:
				break;
		}

		return output;
	}

	module.exports.clean = clean;
	module.exports.pad = pad;
	module.exports.extend = extend;
	module.exports.stringToUint8 = stringToUint8;
	module.exports.uint8ToBase64 = uint8ToBase64;
}());


/***/ }),
/* 1 */
/***/ (function(module, exports, __webpack_require__) {

/*
 * tar-js
 * MIT (c) 2011 T. Jameson Little
 */

(function () {
	"use strict";
	
/*
struct posix_header {             // byte offset
	char name[100];               //   0
	char mode[8];                 // 100
	char uid[8];                  // 108
	char gid[8];                  // 116
	char size[12];                // 124
	char mtime[12];               // 136
	char chksum[8];               // 148
	char typeflag;                // 156
	char linkname[100];           // 157
	char magic[6];                // 257
	char version[2];              // 263
	char uname[32];               // 265
	char gname[32];               // 297
	char devmajor[8];             // 329
	char devminor[8];             // 337
	char prefix[155];             // 345
                                  // 500
};
*/

	var utils = __webpack_require__(0),
		headerFormat;
	
	headerFormat = [
		{
			'field': 'fileName',
			'length': 100
		},
		{
			'field': 'fileMode',
			'length': 8
		},
		{
			'field': 'uid',
			'length': 8
		},
		{
			'field': 'gid',
			'length': 8
		},
		{
			'field': 'fileSize',
			'length': 12
		},
		{
			'field': 'mtime',
			'length': 12
		},
		{
			'field': 'checksum',
			'length': 8
		},
		{
			'field': 'type',
			'length': 1
		},
		{
			'field': 'linkName',
			'length': 100
		},
		{
			'field': 'ustar',
			'length': 8
		},
		{
			'field': 'owner',
			'length': 32
		},
		{
			'field': 'group',
			'length': 32
		},
		{
			'field': 'majorNumber',
			'length': 8
		},
		{
			'field': 'minorNumber',
			'length': 8
		},
		{
			'field': 'filenamePrefix',
			'length': 155
		},
		{
			'field': 'padding',
			'length': 12
		}
	];

	function formatHeader(data, cb) {
		var buffer = utils.clean(512),
			offset = 0;

		headerFormat.forEach(function (value) {
			var str = data[value.field] || "",
				i, length;

			for (i = 0, length = str.length; i < length; i += 1) {
				buffer[offset] = str.charCodeAt(i);
				offset += 1;
			}

			offset += value.length - i; // space it out with nulls
		});

		if (typeof cb === 'function') {
			return cb(buffer, offset);
		}
		return buffer;
	}
	
	module.exports.structure = headerFormat;
	module.exports.format = formatHeader;
}());


/***/ }),
/* 2 */
/***/ (function(module, exports, __webpack_require__) {

/*
 * tar-js
 * MIT (c) 2011 T. Jameson Little
 */

(function () {
	"use strict";

	var header = __webpack_require__(1),
		utils = __webpack_require__(0),
		recordSize = 512,
		blockSize;
	
	function Tar(recordsPerBlock) {
		this.written = 0;
		blockSize = (recordsPerBlock || 20) * recordSize;
		this.out = utils.clean(blockSize);
	}

	Tar.prototype.append = function (filepath, input, opts, callback) {
		var data,
			checksum,
			mode,
			mtime,
			uid,
			gid,
			headerArr;

		if (typeof input === 'string') {
			input = utils.stringToUint8(input);
		} else if (input.constructor !== Uint8Array.prototype.constructor) {
			throw 'Invalid input type. You gave me: ' + input.constructor.toString().match(/function\s*([$A-Za-z_][0-9A-Za-z_]*)\s*\(/)[1];
		}

		if (typeof opts === 'function') {
			callback = opts;
			opts = {};
		}

		opts = opts || {};

		mode = opts.mode || parseInt('777', 8) & 0xfff;
		mtime = opts.mtime || Math.floor(+new Date() / 1000);
		uid = opts.uid || 0;
		gid = opts.gid || 0;

		data = {
			fileName: filepath,
			fileMode: utils.pad(mode, 7),
			uid: utils.pad(uid, 7),
			gid: utils.pad(gid, 7),
			fileSize: utils.pad(input.length, 11),
			mtime: utils.pad(mtime, 11),
			checksum: '        ',
			type: opts.type || '0',
			ustar: 'ustar  ',
			owner: opts.owner || '',
			group: opts.group || ''
		};

		// calculate the checksum
		checksum = 0;
		Object.keys(data).forEach(function (key) {
			var i, value = data[key], length;

			for (i = 0, length = value.length; i < length; i += 1) {
				checksum += value.charCodeAt(i);
			}
		});

		data.checksum = utils.pad(checksum, 6) + "\u0000 ";

		headerArr = header.format(data);

		var i, offset, length;

		this.out.set(headerArr, this.written);

		this.written += headerArr.length;

		// If there is not enough space in this.out, we need to expand it to
		// fit the new input.
		if (this.written + input.length > this.out.length) {
			this.out = utils.extend(this.out, this.written, input.length, blockSize);
		}

		this.out.set(input, this.written);

		// to the nearest multiple of recordSize
		this.written += input.length + (recordSize - (input.length % recordSize || recordSize));

		// make sure there's at least 2 empty records worth of extra space
		if (this.out.length - this.written < recordSize * 2) {
			this.out = utils.extend(this.out, this.written, recordSize * 2, blockSize);
		}

		if (typeof callback === 'function') {
			callback(this.out);
		}

		return this.out;
	};

	Tar.prototype.clear = function () {
		this.written = 0;
		this.out = utils.clean(blockSize);
	};
	
	module.exports = Tar;
}());


/***/ })
/******/ ]);