browserfs
Version:
A filesystem in your browser!
86 lines • 13.3 kB
JavaScript
"use strict";
(function (FileType) {
FileType[FileType["FILE"] = 32768] = "FILE";
FileType[FileType["DIRECTORY"] = 16384] = "DIRECTORY";
FileType[FileType["SYMLINK"] = 40960] = "SYMLINK";
})(exports.FileType || (exports.FileType = {}));
var FileType = exports.FileType;
var Stats = (function () {
function Stats(item_type, size, mode, atime, mtime, ctime) {
if (atime === void 0) { atime = new Date(); }
if (mtime === void 0) { mtime = new Date(); }
if (ctime === void 0) { ctime = new Date(); }
this.size = size;
this.mode = mode;
this.atime = atime;
this.mtime = mtime;
this.ctime = ctime;
this.dev = 0;
this.ino = 0;
this.rdev = 0;
this.nlink = 1;
this.blksize = 4096;
this.uid = 0;
this.gid = 0;
this.birthtime = new Date(0);
this.file_data = null;
if (this.mode == null) {
switch (item_type) {
case FileType.FILE:
this.mode = 0x1a4;
break;
case FileType.DIRECTORY:
default:
this.mode = 0x1ff;
}
}
this.blocks = Math.ceil(size / 512);
if (this.mode < 0x1000) {
this.mode |= item_type;
}
}
Stats.prototype.toBuffer = function () {
var buffer = new Buffer(32);
buffer.writeUInt32LE(this.size, 0);
buffer.writeUInt32LE(this.mode, 4);
buffer.writeDoubleLE(this.atime.getTime(), 8);
buffer.writeDoubleLE(this.mtime.getTime(), 16);
buffer.writeDoubleLE(this.ctime.getTime(), 24);
return buffer;
};
Stats.fromBuffer = function (buffer) {
var size = buffer.readUInt32LE(0), mode = buffer.readUInt32LE(4), atime = buffer.readDoubleLE(8), mtime = buffer.readDoubleLE(16), ctime = buffer.readDoubleLE(24);
return new Stats(mode & 0xF000, size, mode & 0xFFF, new Date(atime), new Date(mtime), new Date(ctime));
};
Stats.prototype.clone = function () {
return new Stats(this.mode & 0xF000, this.size, this.mode & 0xFFF, this.atime, this.mtime, this.ctime);
};
Stats.prototype.isFile = function () {
return (this.mode & 0xF000) === FileType.FILE;
};
Stats.prototype.isDirectory = function () {
return (this.mode & 0xF000) === FileType.DIRECTORY;
};
Stats.prototype.isSymbolicLink = function () {
return (this.mode & 0xF000) === FileType.SYMLINK;
};
Stats.prototype.chmod = function (mode) {
this.mode = (this.mode & 0xF000) | mode;
};
Stats.prototype.isSocket = function () {
return false;
};
Stats.prototype.isBlockDevice = function () {
return false;
};
Stats.prototype.isCharacterDevice = function () {
return false;
};
Stats.prototype.isFIFO = function () {
return false;
};
return Stats;
}());
exports.__esModule = true;
exports["default"] = Stats;
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Applied to 'mode'.\n */\nexport enum FileType {\n  FILE = 0x8000,\n  DIRECTORY = 0x4000,\n  SYMLINK = 0xA000\n}\n\n/**\n * Emulation of Node's `fs.Stats` object.\n *\n * Attribute descriptions are from `man 2 stat'\n * @see http://nodejs.org/api/fs.html#fs_class_fs_stats\n * @see http://man7.org/linux/man-pages/man2/stat.2.html\n * @class\n */\nexport default class Stats implements fs.Stats {\n  public blocks: number;\n  /**\n   * UNSUPPORTED ATTRIBUTES\n   * I assume no one is going to need these details, although we could fake\n   * appropriate values if need be.\n   */\n  // ID of device containing file\n  public dev: number = 0;\n  // inode number\n  public ino: number = 0;\n  // device ID (if special file)\n  public rdev: number = 0;\n  // number of hard links\n  public nlink: number = 1;\n  // blocksize for file system I/O\n  public blksize: number = 4096;\n  // @todo Maybe support these? atm, it's a one-user filesystem.\n  // user ID of owner\n  public uid: number = 0;\n  // group ID of owner\n  public gid: number = 0;\n  // time file was created (currently unsupported)\n  public birthtime: Date = new Date(0);\n  // XXX: Some file systems stash data on stats objects.\n  public file_data: NodeBuffer = null;\n\n  /**\n   * Provides information about a particular entry in the file system.\n   * @param [Number] item_type type of the item (FILE, DIRECTORY, SYMLINK, or SOCKET)\n   * @param [Number] size Size of the item in bytes. For directories/symlinks,\n   *   this is normally the size of the struct that represents the item.\n   * @param [Number] mode Unix-style file mode (e.g. 0o644)\n   * @param [Date?] atime time of last access\n   * @param [Date?] mtime time of last modification\n   * @param [Date?] ctime time of creation\n   */\n  constructor(\n    item_type: FileType,\n    public size: number,\n    public mode?: number,\n    public atime: Date = new Date(),\n    public mtime: Date = new Date(),\n    public ctime: Date = new Date()) {\n    if (this.mode == null) {\n      switch(item_type) {\n        case FileType.FILE:\n          this.mode = 0x1a4;\n          break;\n        case FileType.DIRECTORY:\n        default:\n          this.mode = 0x1ff;\n      }\n    }\n    // number of 512B blocks allocated\n    this.blocks = Math.ceil(size / 512);\n    // Check if mode also includes top-most bits, which indicate the file's\n    // type.\n    if (this.mode < 0x1000) {\n      this.mode |= item_type;\n    }\n  }\n\n  public toBuffer(): Buffer {\n    var buffer = new Buffer(32);\n    buffer.writeUInt32LE(this.size, 0);\n    buffer.writeUInt32LE(this.mode, 4);\n    buffer.writeDoubleLE(this.atime.getTime(), 8);\n    buffer.writeDoubleLE(this.mtime.getTime(), 16);\n    buffer.writeDoubleLE(this.ctime.getTime(), 24);\n    return buffer;\n  }\n\n  public static fromBuffer(buffer: Buffer): Stats {\n    var size = buffer.readUInt32LE(0),\n      mode = buffer.readUInt32LE(4),\n      atime = buffer.readDoubleLE(8),\n      mtime = buffer.readDoubleLE(16),\n      ctime = buffer.readDoubleLE(24);\n\n    return new Stats(mode & 0xF000, size, mode & 0xFFF, new Date(atime), new Date(mtime), new Date(ctime));\n  }\n\n  /**\n   * **Nonstandard**: Clone the stats object.\n   * @return [BrowserFS.node.fs.Stats]\n   */\n  public clone(): Stats {\n    return new Stats(this.mode & 0xF000, this.size, this.mode & 0xFFF, this.atime, this.mtime, this.ctime);\n  }\n\n  /**\n   * @return [Boolean] True if this item is a file.\n   */\n  public isFile(): boolean {\n    return (this.mode & 0xF000) === FileType.FILE;\n  }\n\n  /**\n   * @return [Boolean] True if this item is a directory.\n   */\n  public isDirectory(): boolean {\n    return (this.mode & 0xF000) === FileType.DIRECTORY;\n  }\n\n  /**\n   * @return [Boolean] True if this item is a symbolic link (only valid through lstat)\n   */\n  public isSymbolicLink(): boolean {\n    return (this.mode & 0xF000) === FileType.SYMLINK;\n  }\n\n  /**\n   * Change the mode of the file. We use this helper function to prevent messing\n   * up the type of the file, which is encoded in mode.\n   */\n  public chmod(mode: number): void {\n    this.mode = (this.mode & 0xF000) | mode;\n  }\n\n  // We don't support the following types of files.\n\n  public isSocket(): boolean {\n    return false;\n  }\n\n  public isBlockDevice(): boolean {\n    return false;\n  }\n\n  public isCharacterDevice(): boolean {\n    return false;\n  }\n\n  public isFIFO(): boolean {\n    return false;\n  }\n}\n"]}