FM / lib

/var/www/cobraambalaj/node_modules/memfs/lib/

/var/www/cobraambalaj/node_modules/memfs/lib

Name	Size	Mode	Actions
internal/	-	0755	rm
constants.d.ts	1334	0644	edit dl rm
constants.js	1048	0644	edit dl rm
Dirent.d.ts	535	0644	edit dl rm
Dirent.js	1868	0644	edit dl rm
encoding.d.ts	366	0644	edit dl rm
encoding.js	831	0644	edit dl rm
getBigInt.js	191	0644	edit dl rm
index.d.ts	854	0644	edit dl rm
index.js	2162	0644	edit dl rm
node.d.ts	3995	0644	edit dl rm
node.js	13281	0644	edit dl rm
process.d.ts	372	0644	edit dl rm
process.js	1327	0644	edit dl rm
promises.d.ts	4218	0644	edit dl rm
promises.js	6234	0644	edit dl rm
setImmediate.d.ts	151	0644	edit dl rm
setImmediate.js	266	0644	edit dl rm
setTimeoutUnref.d.ts	339	0644	edit dl rm
setTimeoutUnref.js	442	0644	edit dl rm
Stats.d.ts	900	0644	edit dl rm
Stats.js	2895	0644	edit dl rm
volume-localstorage.d.ts	471	0644	edit dl rm
volume-localstorage.js	4175	0644	edit dl rm
volume.d.ts	16431	0644	edit dl rm
volume.js	84127	0644	edit dl rm

Edit: /var/www/cobraambalaj/node_modules/memfs/lib/volume.js (84127B)

"use strict";
var __extends = (this && this.__extends) || (function () {
    var extendStatics = function (d, b) {
        extendStatics = Object.setPrototypeOf ||
            ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
            function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
        return extendStatics(d, b);
    };
    return function (d, b) {
        extendStatics(d, b);
        function __() { this.constructor = d; }
        d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
    };
})();
var __spreadArrays = (this && this.__spreadArrays) || function () {
    for (var s = 0, i = 0, il = arguments.length; i < il; i++) s += arguments[i].length;
    for (var r = Array(s), k = 0, i = 0; i < il; i++)
        for (var a = arguments[i], j = 0, jl = a.length; j < jl; j++, k++)
            r[k] = a[j];
    return r;
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.FSWatcher = exports.StatWatcher = exports.Volume = exports.toUnixTimestamp = exports.bufferToEncoding = exports.dataToBuffer = exports.dataToStr = exports.pathToSteps = exports.filenameToSteps = exports.pathToFilename = exports.flagsToNumber = exports.FLAGS = void 0;
var pathModule = require("path");
var node_1 = require("./node");
var Stats_1 = require("./Stats");
var Dirent_1 = require("./Dirent");
var buffer_1 = require("./internal/buffer");
var setImmediate_1 = require("./setImmediate");
var process_1 = require("./process");
var setTimeoutUnref_1 = require("./setTimeoutUnref");
var stream_1 = require("stream");
var constants_1 = require("./constants");
var events_1 = require("events");
var encoding_1 = require("./encoding");
var errors = require("./internal/errors");
var util = require("util");
var promises_1 = require("./promises");
var resolveCrossPlatform = pathModule.resolve;
var O_RDONLY = constants_1.constants.O_RDONLY, O_WRONLY = constants_1.constants.O_WRONLY, O_RDWR = constants_1.constants.O_RDWR, O_CREAT = constants_1.constants.O_CREAT, O_EXCL = constants_1.constants.O_EXCL, O_TRUNC = constants_1.constants.O_TRUNC, O_APPEND = constants_1.constants.O_APPEND, O_SYNC = constants_1.constants.O_SYNC, O_DIRECTORY = constants_1.constants.O_DIRECTORY, F_OK = constants_1.constants.F_OK, COPYFILE_EXCL = constants_1.constants.COPYFILE_EXCL, COPYFILE_FICLONE_FORCE = constants_1.constants.COPYFILE_FICLONE_FORCE;
var _a = pathModule.posix ? pathModule.posix : pathModule, sep = _a.sep, relative = _a.relative, join = _a.join, dirname = _a.dirname;
var isWin = process_1.default.platform === 'win32';
var kMinPoolSpace = 128;
// const kMaxLength = require('buffer').kMaxLength;
// ---------------------------------------- Error messages
// TODO: Use `internal/errors.js` in the future.
var ERRSTR = {
    PATH_STR: 'path must be a string or Buffer',
    // FD:             'file descriptor must be a unsigned 32-bit integer',
    FD: 'fd must be a file descriptor',
    MODE_INT: 'mode must be an int',
    CB: 'callback must be a function',
    UID: 'uid must be an unsigned int',
    GID: 'gid must be an unsigned int',
    LEN: 'len must be an integer',
    ATIME: 'atime must be an integer',
    MTIME: 'mtime must be an integer',
    PREFIX: 'filename prefix is required',
    BUFFER: 'buffer must be an instance of Buffer or StaticBuffer',
    OFFSET: 'offset must be an integer',
    LENGTH: 'length must be an integer',
    POSITION: 'position must be an integer',
};
var ERRSTR_OPTS = function (tipeof) { return "Expected options to be either an object or a string, but got " + tipeof + " instead"; };
// const ERRSTR_FLAG = flag => `Unknown file open flag: ${flag}`;
var ENOENT = 'ENOENT';
var EBADF = 'EBADF';
var EINVAL = 'EINVAL';
var EPERM = 'EPERM';
var EPROTO = 'EPROTO';
var EEXIST = 'EEXIST';
var ENOTDIR = 'ENOTDIR';
var EMFILE = 'EMFILE';
var EACCES = 'EACCES';
var EISDIR = 'EISDIR';
var ENOTEMPTY = 'ENOTEMPTY';
var ENOSYS = 'ENOSYS';
function formatError(errorCode, func, path, path2) {
    if (func === void 0) { func = ''; }
    if (path === void 0) { path = ''; }
    if (path2 === void 0) { path2 = ''; }
    var pathFormatted = '';
    if (path)
        pathFormatted = " '" + path + "'";
    if (path2)
        pathFormatted += " -> '" + path2 + "'";
    switch (errorCode) {
        case ENOENT:
            return "ENOENT: no such file or directory, " + func + pathFormatted;
        case EBADF:
            return "EBADF: bad file descriptor, " + func + pathFormatted;
        case EINVAL:
            return "EINVAL: invalid argument, " + func + pathFormatted;
        case EPERM:
            return "EPERM: operation not permitted, " + func + pathFormatted;
        case EPROTO:
            return "EPROTO: protocol error, " + func + pathFormatted;
        case EEXIST:
            return "EEXIST: file already exists, " + func + pathFormatted;
        case ENOTDIR:
            return "ENOTDIR: not a directory, " + func + pathFormatted;
        case EISDIR:
            return "EISDIR: illegal operation on a directory, " + func + pathFormatted;
        case EACCES:
            return "EACCES: permission denied, " + func + pathFormatted;
        case ENOTEMPTY:
            return "ENOTEMPTY: directory not empty, " + func + pathFormatted;
        case EMFILE:
            return "EMFILE: too many open files, " + func + pathFormatted;
        case ENOSYS:
            return "ENOSYS: function not implemented, " + func + pathFormatted;
        default:
            return errorCode + ": error occurred, " + func + pathFormatted;
    }
}
function createError(errorCode, func, path, path2, Constructor) {
    if (func === void 0) { func = ''; }
    if (path === void 0) { path = ''; }
    if (path2 === void 0) { path2 = ''; }
    if (Constructor === void 0) { Constructor = Error; }
    var error = new Constructor(formatError(errorCode, func, path, path2));
    error.code = errorCode;
    return error;
}
// ---------------------------------------- Flags
// List of file `flags` as defined by Node.
var FLAGS;
(function (FLAGS) {
    // Open file for reading. An exception occurs if the file does not exist.
    FLAGS[FLAGS["r"] = O_RDONLY] = "r";
    // Open file for reading and writing. An exception occurs if the file does not exist.
    FLAGS[FLAGS["r+"] = O_RDWR] = "r+";
    // Open file for reading in synchronous mode. Instructs the operating system to bypass the local file system cache.
    FLAGS[FLAGS["rs"] = O_RDONLY | O_SYNC] = "rs";
    FLAGS[FLAGS["sr"] = FLAGS.rs] = "sr";
    // Open file for reading and writing, telling the OS to open it synchronously. See notes for 'rs' about using this with caution.
    FLAGS[FLAGS["rs+"] = O_RDWR | O_SYNC] = "rs+";
    FLAGS[FLAGS["sr+"] = FLAGS['rs+']] = "sr+";
    // Open file for writing. The file is created (if it does not exist) or truncated (if it exists).
    FLAGS[FLAGS["w"] = O_WRONLY | O_CREAT | O_TRUNC] = "w";
    // Like 'w' but fails if path exists.
    FLAGS[FLAGS["wx"] = O_WRONLY | O_CREAT | O_TRUNC | O_EXCL] = "wx";
    FLAGS[FLAGS["xw"] = FLAGS.wx] = "xw";
    // Open file for reading and writing. The file is created (if it does not exist) or truncated (if it exists).
    FLAGS[FLAGS["w+"] = O_RDWR | O_CREAT | O_TRUNC] = "w+";
    // Like 'w+' but fails if path exists.
    FLAGS[FLAGS["wx+"] = O_RDWR | O_CREAT | O_TRUNC | O_EXCL] = "wx+";
    FLAGS[FLAGS["xw+"] = FLAGS['wx+']] = "xw+";
    // Open file for appending. The file is created if it does not exist.
    FLAGS[FLAGS["a"] = O_WRONLY | O_APPEND | O_CREAT] = "a";
    // Like 'a' but fails if path exists.
    FLAGS[FLAGS["ax"] = O_WRONLY | O_APPEND | O_CREAT | O_EXCL] = "ax";
    FLAGS[FLAGS["xa"] = FLAGS.ax] = "xa";
    // Open file for reading and appending. The file is created if it does not exist.
    FLAGS[FLAGS["a+"] = O_RDWR | O_APPEND | O_CREAT] = "a+";
    // Like 'a+' but fails if path exists.
    FLAGS[FLAGS["ax+"] = O_RDWR | O_APPEND | O_CREAT | O_EXCL] = "ax+";
    FLAGS[FLAGS["xa+"] = FLAGS['ax+']] = "xa+";
})(FLAGS = exports.FLAGS || (exports.FLAGS = {}));
function flagsToNumber(flags) {
    if (typeof flags === 'number')
        return flags;
    if (typeof flags === 'string') {
        var flagsNum = FLAGS[flags];
        if (typeof flagsNum !== 'undefined')
            return flagsNum;
    }
    // throw new TypeError(formatError(ERRSTR_FLAG(flags)));
    throw new errors.TypeError('ERR_INVALID_OPT_VALUE', 'flags', flags);
}
exports.flagsToNumber = flagsToNumber;
// ---------------------------------------- Options
function getOptions(defaults, options) {
    var opts;
    if (!options)
        return defaults;
    else {
        var tipeof = typeof options;
        switch (tipeof) {
            case 'string':
                opts = Object.assign({}, defaults, { encoding: options });
                break;
            case 'object':
                opts = Object.assign({}, defaults, options);
                break;
            default:
                throw TypeError(ERRSTR_OPTS(tipeof));
        }
    }
    if (opts.encoding !== 'buffer')
        encoding_1.assertEncoding(opts.encoding);
    return opts;
}
function optsGenerator(defaults) {
    return function (options) { return getOptions(defaults, options); };
}
function validateCallback(callback) {
    if (typeof callback !== 'function')
        throw TypeError(ERRSTR.CB);
    return callback;
}
function optsAndCbGenerator(getOpts) {
    return function (options, callback) {
        return typeof options === 'function' ? [getOpts(), options] : [getOpts(options), validateCallback(callback)];
    };
}
var optsDefaults = {
    encoding: 'utf8',
};
var getDefaultOpts = optsGenerator(optsDefaults);
var getDefaultOptsAndCb = optsAndCbGenerator(getDefaultOpts);
var readFileOptsDefaults = {
    flag: 'r',
};
var getReadFileOptions = optsGenerator(readFileOptsDefaults);
var writeFileDefaults = {
    encoding: 'utf8',
    mode: 438 /* DEFAULT */,
    flag: FLAGS[FLAGS.w],
};
var getWriteFileOptions = optsGenerator(writeFileDefaults);
var appendFileDefaults = {
    encoding: 'utf8',
    mode: 438 /* DEFAULT */,
    flag: FLAGS[FLAGS.a],
};
var getAppendFileOpts = optsGenerator(appendFileDefaults);
var getAppendFileOptsAndCb = optsAndCbGenerator(getAppendFileOpts);
var realpathDefaults = optsDefaults;
var getRealpathOptions = optsGenerator(realpathDefaults);
var getRealpathOptsAndCb = optsAndCbGenerator(getRealpathOptions);
var mkdirDefaults = {
    mode: 511 /* DIR */,
    recursive: false,
};
var getMkdirOptions = function (options) {
    if (typeof options === 'number')
        return Object.assign({}, mkdirDefaults, { mode: options });
    return Object.assign({}, mkdirDefaults, options);
};
var rmdirDefaults = {
    recursive: false,
};
var getRmdirOptions = function (options) {
    return Object.assign({}, rmdirDefaults, options);
};
var readdirDefaults = {
    encoding: 'utf8',
    withFileTypes: false,
};
var getReaddirOptions = optsGenerator(readdirDefaults);
var getReaddirOptsAndCb = optsAndCbGenerator(getReaddirOptions);
var statDefaults = {
    bigint: false,
};
var getStatOptions = function (options) {
    if (options === void 0) { options = {}; }
    return Object.assign({}, statDefaults, options);
};
var getStatOptsAndCb = function (options, callback) {
    return typeof options === 'function' ? [getStatOptions(), options] : [getStatOptions(options), validateCallback(callback)];
};
// ---------------------------------------- Utility functions
function getPathFromURLPosix(url) {
    if (url.hostname !== '') {
        throw new errors.TypeError('ERR_INVALID_FILE_URL_HOST', process_1.default.platform);
    }
    var pathname = url.pathname;
    for (var n = 0; n < pathname.length; n++) {
        if (pathname[n] === '%') {
            var third = pathname.codePointAt(n + 2) | 0x20;
            if (pathname[n + 1] === '2' && third === 102) {
                throw new errors.TypeError('ERR_INVALID_FILE_URL_PATH', 'must not include encoded / characters');
            }
        }
    }
    return decodeURIComponent(pathname);
}
function pathToFilename(path) {
    if (typeof path !== 'string' && !buffer_1.Buffer.isBuffer(path)) {
        try {
            if (!(path instanceof require('url').URL))
                throw new TypeError(ERRSTR.PATH_STR);
        }
        catch (err) {
            throw new TypeError(ERRSTR.PATH_STR);
        }
        path = getPathFromURLPosix(path);
    }
    var pathString = String(path);
    nullCheck(pathString);
    // return slash(pathString);
    return pathString;
}
exports.pathToFilename = pathToFilename;
var resolve = function (filename, base) {
    if (base === void 0) { base = process_1.default.cwd(); }
    return resolveCrossPlatform(base, filename);
};
if (isWin) {
    var _resolve_1 = resolve;
    var unixify_1 = require('fs-monkey/lib/correctPath').unixify;
    resolve = function (filename, base) { return unixify_1(_resolve_1(filename, base)); };
}
function filenameToSteps(filename, base) {
    var fullPath = resolve(filename, base);
    var fullPathSansSlash = fullPath.substr(1);
    if (!fullPathSansSlash)
        return [];
    return fullPathSansSlash.split(sep);
}
exports.filenameToSteps = filenameToSteps;
function pathToSteps(path) {
    return filenameToSteps(pathToFilename(path));
}
exports.pathToSteps = pathToSteps;
function dataToStr(data, encoding) {
    if (encoding === void 0) { encoding = encoding_1.ENCODING_UTF8; }
    if (buffer_1.Buffer.isBuffer(data))
        return data.toString(encoding);
    else if (data instanceof Uint8Array)
        return buffer_1.bufferFrom(data).toString(encoding);
    else
        return String(data);
}
exports.dataToStr = dataToStr;
function dataToBuffer(data, encoding) {
    if (encoding === void 0) { encoding = encoding_1.ENCODING_UTF8; }
    if (buffer_1.Buffer.isBuffer(data))
        return data;
    else if (data instanceof Uint8Array)
        return buffer_1.bufferFrom(data);
    else
        return buffer_1.bufferFrom(String(data), encoding);
}
exports.dataToBuffer = dataToBuffer;
function bufferToEncoding(buffer, encoding) {
    if (!encoding || encoding === 'buffer')
        return buffer;
    else
        return buffer.toString(encoding);
}
exports.bufferToEncoding = bufferToEncoding;
function nullCheck(path, callback) {
    if (('' + path).indexOf('\u0000') !== -1) {
        var er = new Error('Path must be a string without null bytes');
        er.code = ENOENT;
        if (typeof callback !== 'function')
            throw er;
        process_1.default.nextTick(callback, er);
        return false;
    }
    return true;
}
function _modeToNumber(mode, def) {
    if (typeof mode === 'number')
        return mode;
    if (typeof mode === 'string')
        return parseInt(mode, 8);
    if (def)
        return modeToNumber(def);
    return undefined;
}
function modeToNumber(mode, def) {
    var result = _modeToNumber(mode, def);
    if (typeof result !== 'number' || isNaN(result))
        throw new TypeError(ERRSTR.MODE_INT);
    return result;
}
function isFd(path) {
    return path >>> 0 === path;
}
function validateFd(fd) {
    if (!isFd(fd))
        throw TypeError(ERRSTR.FD);
}
// converts Date or number to a fractional UNIX timestamp
function toUnixTimestamp(time) {
    // tslint:disable-next-line triple-equals
    if (typeof time === 'string' && +time == time) {
        return +time;
    }
    if (time instanceof Date) {
        return time.getTime() / 1000;
    }
    if (isFinite(time)) {
        if (time < 0) {
            return Date.now() / 1000;
        }
        return time;
    }
    throw new Error('Cannot parse time: ' + time);
}
exports.toUnixTimestamp = toUnixTimestamp;
function validateUid(uid) {
    if (typeof uid !== 'number')
        throw TypeError(ERRSTR.UID);
}
function validateGid(gid) {
    if (typeof gid !== 'number')
        throw TypeError(ERRSTR.GID);
}
function flattenJSON(nestedJSON) {
    var flatJSON = {};
    function flatten(pathPrefix, node) {
        for (var path in node) {
            var contentOrNode = node[path];
            var joinedPath = join(pathPrefix, path);
            if (typeof contentOrNode === 'string') {
                flatJSON[joinedPath] = contentOrNode;
            }
            else if (typeof contentOrNode === 'object' && contentOrNode !== null && Object.keys(contentOrNode).length > 0) {
                // empty directories need an explicit entry and therefore get handled in `else`, non-empty ones are implicitly considered
                flatten(joinedPath, contentOrNode);
            }
            else {
                // without this branch null, empty-object or non-object entries would not be handled in the same way
                // by both fromJSON() and fromNestedJSON()
                flatJSON[joinedPath] = null;
            }
        }
    }
    flatten('', nestedJSON);
    return flatJSON;
}
/**
 * `Volume` represents a file system.
 */
var Volume = /** @class */ (function () {
    function Volume(props) {
        if (props === void 0) { props = {}; }
        // I-node number counter.
        this.ino = 0;
        // A mapping for i-node numbers to i-nodes (`Node`);
        this.inodes = {};
        // List of released i-node numbers, for reuse.
        this.releasedInos = [];
        // A mapping for file descriptors to `File`s.
        this.fds = {};
        // A list of reusable (opened and closed) file descriptors, that should be
        // used first before creating a new file descriptor.
        this.releasedFds = [];
        // Max number of open files.
        this.maxFiles = 10000;
        // Current number of open files.
        this.openFiles = 0;
        this.promisesApi = promises_1.default(this);
        this.statWatchers = {};
        this.props = Object.assign({ Node: node_1.Node, Link: node_1.Link, File: node_1.File }, props);
        var root = this.createLink();
        root.setNode(this.createNode(true));
        var self = this; // tslint:disable-line no-this-assignment
        this.StatWatcher = /** @class */ (function (_super) {
            __extends(StatWatcher, _super);
            function StatWatcher() {
                return _super.call(this, self) || this;
            }
            return StatWatcher;
        }(StatWatcher));
        var _ReadStream = FsReadStream;
        this.ReadStream = /** @class */ (function (_super) {
            __extends(class_1, _super);
            function class_1() {
                var args = [];
                for (var _i = 0; _i < arguments.length; _i++) {
                    args[_i] = arguments[_i];
                }
                return _super.apply(this, __spreadArrays([self], args)) || this;
            }
            return class_1;
        }(_ReadStream));
        var _WriteStream = FsWriteStream;
        this.WriteStream = /** @class */ (function (_super) {
            __extends(class_2, _super);
            function class_2() {
                var args = [];
                for (var _i = 0; _i < arguments.length; _i++) {
                    args[_i] = arguments[_i];
                }
                return _super.apply(this, __spreadArrays([self], args)) || this;
            }
            return class_2;
        }(_WriteStream));
        this.FSWatcher = /** @class */ (function (_super) {
            __extends(FSWatcher, _super);
            function FSWatcher() {
                return _super.call(this, self) || this;
            }
            return FSWatcher;
        }(FSWatcher));
        // root.setChild('.', root);
        // root.getNode().nlink++;
        // root.setChild('..', root);
        // root.getNode().nlink++;
        this.root = root;
    }
    Volume.fromJSON = function (json, cwd) {
        var vol = new Volume();
        vol.fromJSON(json, cwd);
        return vol;
    };
    Volume.fromNestedJSON = function (json, cwd) {
        var vol = new Volume();
        vol.fromNestedJSON(json, cwd);
        return vol;
    };
    Object.defineProperty(Volume.prototype, "promises", {
        get: function () {
            if (this.promisesApi === null)
                throw new Error('Promise is not supported in this environment.');
            return this.promisesApi;
        },
        enumerable: false,
        configurable: true
    });
    Volume.prototype.createLink = function (parent, name, isDirectory, perm) {
        if (isDirectory === void 0) { isDirectory = false; }
        if (!parent) {
            return new this.props.Link(this, null, '');
        }
        if (!name) {
            throw new Error('createLink: name cannot be empty');
        }
        return parent.createChild(name, this.createNode(isDirectory, perm));
    };
    Volume.prototype.deleteLink = function (link) {
        var parent = link.parent;
        if (parent) {
            parent.deleteChild(link);
            return true;
        }
        return false;
    };
    Volume.prototype.newInoNumber = function () {
        var releasedFd = this.releasedInos.pop();
        if (releasedFd)
            return releasedFd;
        else {
            this.ino = (this.ino + 1) % 0xffffffff;
            return this.ino;
        }
    };
    Volume.prototype.newFdNumber = function () {
        var releasedFd = this.releasedFds.pop();
        return typeof releasedFd === 'number' ? releasedFd : Volume.fd--;
    };
    Volume.prototype.createNode = function (isDirectory, perm) {
        if (isDirectory === void 0) { isDirectory = false; }
        var node = new this.props.Node(this.newInoNumber(), perm);
        if (isDirectory)
            node.setIsDirectory();
        this.inodes[node.ino] = node;
        return node;
    };
    Volume.prototype.getNode = function (ino) {
        return this.inodes[ino];
    };
    Volume.prototype.deleteNode = function (node) {
        node.del();
        delete this.inodes[node.ino];
        this.releasedInos.push(node.ino);
    };
    // Generates 6 character long random string, used by `mkdtemp`.
    Volume.prototype.genRndStr = function () {
        var str = (Math.random() + 1).toString(36).substr(2, 6);
        if (str.length === 6)
            return str;
        else
            return this.genRndStr();
    };
    // Returns a `Link` (hard link) referenced by path "split" into steps.
    Volume.prototype.getLink = function (steps) {
        return this.root.walk(steps);
    };
    // Just link `getLink`, but throws a correct user error, if link to found.
    Volume.prototype.getLinkOrThrow = function (filename, funcName) {
        var steps = filenameToSteps(filename);
        var link = this.getLink(steps);
        if (!link)
            throw createError(ENOENT, funcName, filename);
        return link;
    };
    // Just like `getLink`, but also dereference/resolves symbolic links.
    Volume.prototype.getResolvedLink = function (filenameOrSteps) {
        var steps = typeof filenameOrSteps === 'string' ? filenameToSteps(filenameOrSteps) : filenameOrSteps;
        var link = this.root;
        var i = 0;
        while (i < steps.length) {
            var step = steps[i];
            link = link.getChild(step);
            if (!link)
                return null;
            var node = link.getNode();
            if (node.isSymlink()) {
                steps = node.symlink.concat(steps.slice(i + 1));
                link = this.root;
                i = 0;
                continue;
            }
            i++;
        }
        return link;
    };
    // Just like `getLinkOrThrow`, but also dereference/resolves symbolic links.
    Volume.prototype.getResolvedLinkOrThrow = function (filename, funcName) {
        var link = this.getResolvedLink(filename);
        if (!link)
            throw createError(ENOENT, funcName, filename);
        return link;
    };
    Volume.prototype.resolveSymlinks = function (link) {
        // let node: Node = link.getNode();
        // while(link && node.isSymlink()) {
        //     link = this.getLink(node.symlink);
        //     if(!link) return null;
        //     node = link.getNode();
        // }
        // return link;
        return this.getResolvedLink(link.steps.slice(1));
    };
    // Just like `getLinkOrThrow`, but also verifies that the link is a directory.
    Volume.prototype.getLinkAsDirOrThrow = function (filename, funcName) {
        var link = this.getLinkOrThrow(filename, funcName);
        if (!link.getNode().isDirectory())
            throw createError(ENOTDIR, funcName, filename);
        return link;
    };
    // Get the immediate parent directory of the link.
    Volume.prototype.getLinkParent = function (steps) {
        return this.root.walk(steps, steps.length - 1);
    };
    Volume.prototype.getLinkParentAsDirOrThrow = function (filenameOrSteps, funcName) {
        var steps = filenameOrSteps instanceof Array ? filenameOrSteps : filenameToSteps(filenameOrSteps);
        var link = this.getLinkParent(steps);
        if (!link)
            throw createError(ENOENT, funcName, sep + steps.join(sep));
        if (!link.getNode().isDirectory())
            throw createError(ENOTDIR, funcName, sep + steps.join(sep));
        return link;
    };
    Volume.prototype.getFileByFd = function (fd) {
        return this.fds[String(fd)];
    };
    Volume.prototype.getFileByFdOrThrow = function (fd, funcName) {
        if (!isFd(fd))
            throw TypeError(ERRSTR.FD);
        var file = this.getFileByFd(fd);
        if (!file)
            throw createError(EBADF, funcName);
        return file;
    };
    Volume.prototype.getNodeByIdOrCreate = function (id, flags, perm) {
        if (typeof id === 'number') {
            var file = this.getFileByFd(id);
            if (!file)
                throw Error('File nto found');
            return file.node;
        }
        else {
            var steps = pathToSteps(id);
            var link = this.getLink(steps);
            if (link)
                return link.getNode();
            // Try creating a node if not found.
            if (flags & O_CREAT) {
                var dirLink = this.getLinkParent(steps);
                if (dirLink) {
                    var name_1 = steps[steps.length - 1];
                    link = this.createLink(dirLink, name_1, false, perm);
                    return link.getNode();
                }
            }
            throw createError(ENOENT, 'getNodeByIdOrCreate', pathToFilename(id));
        }
    };
    Volume.prototype.wrapAsync = function (method, args, callback) {
        var _this = this;
        validateCallback(callback);
        setImmediate_1.default(function () {
            try {
                callback(null, method.apply(_this, args));
            }
            catch (err) {
                callback(err);
            }
        });
    };
    Volume.prototype._toJSON = function (link, json, path) {
        var _a;
        if (link === void 0) { link = this.root; }
        if (json === void 0) { json = {}; }
        var isEmpty = true;
        var children = link.children;
        if (link.getNode().isFile()) {
            children = (_a = {}, _a[link.getName()] = link.parent.getChild(link.getName()), _a);
            link = link.parent;
        }
        for (var name_2 in children) {
            isEmpty = false;
            var child = link.getChild(name_2);
            if (!child) {
                throw new Error('_toJSON: unexpected undefined');
            }
            var node = child.getNode();
            if (node.isFile()) {
                var filename = child.getPath();
                if (path)
                    filename = relative(path, filename);
                json[filename] = node.getString();
            }
            else if (node.isDirectory()) {
                this._toJSON(child, json, path);
            }
        }
        var dirPath = link.getPath();
        if (path)
            dirPath = relative(path, dirPath);
        if (dirPath && isEmpty) {
            json[dirPath] = null;
        }
        return json;
    };
    Volume.prototype.toJSON = function (paths, json, isRelative) {
        if (json === void 0) { json = {}; }
        if (isRelative === void 0) { isRelative = false; }
        var links = [];
        if (paths) {
            if (!(paths instanceof Array))
                paths = [paths];
            for (var _i = 0, paths_1 = paths; _i < paths_1.length; _i++) {
                var path = paths_1[_i];
                var filename = pathToFilename(path);
                var link = this.getResolvedLink(filename);
                if (!link)
                    continue;
                links.push(link);
            }
        }
        else {
            links.push(this.root);
        }
        if (!links.length)
            return json;
        for (var _a = 0, links_1 = links; _a < links_1.length; _a++) {
            var link = links_1[_a];
            this._toJSON(link, json, isRelative ? link.getPath() : '');
        }
        return json;
    };
    Volume.prototype.fromJSON = function (json, cwd) {
        if (cwd === void 0) { cwd = process_1.default.cwd(); }
        for (var filename in json) {
            var data = json[filename];
            filename = resolve(filename, cwd);
            if (typeof data === 'string') {
                var dir = dirname(filename);
                this.mkdirpBase(dir, 511 /* DIR */);
                this.writeFileSync(filename, data);
            }
            else {
                this.mkdirpBase(filename, 511 /* DIR */);
            }
        }
    };
    Volume.prototype.fromNestedJSON = function (json, cwd) {
        this.fromJSON(flattenJSON(json), cwd);
    };
    Volume.prototype.reset = function () {
        this.ino = 0;
        this.inodes = {};
        this.releasedInos = [];
        this.fds = {};
        this.releasedFds = [];
        this.openFiles = 0;
        this.root = this.createLink();
        this.root.setNode(this.createNode(true));
    };
    // Legacy interface
    Volume.prototype.mountSync = function (mountpoint, json) {
        this.fromJSON(json, mountpoint);
    };
    Volume.prototype.openLink = function (link, flagsNum, resolveSymlinks) {
        if (resolveSymlinks === void 0) { resolveSymlinks = true; }
        if (this.openFiles >= this.maxFiles) {
            // Too many open files.
            throw createError(EMFILE, 'open', link.getPath());
        }
        // Resolve symlinks.
        var realLink = link;
        if (resolveSymlinks)
            realLink = this.resolveSymlinks(link);
        if (!realLink)
            throw createError(ENOENT, 'open', link.getPath());
        var node = realLink.getNode();
        // Check whether node is a directory
        if (node.isDirectory()) {
            if ((flagsNum & (O_RDONLY | O_RDWR | O_WRONLY)) !== O_RDONLY)
                throw createError(EISDIR, 'open', link.getPath());
        }
        else {
            if (flagsNum & O_DIRECTORY)
                throw createError(ENOTDIR, 'open', link.getPath());
        }
        // Check node permissions
        if (!(flagsNum & O_WRONLY)) {
            if (!node.canRead()) {
                throw createError(EACCES, 'open', link.getPath());
            }
        }
        if (flagsNum & O_RDWR) {
        }
        var file = new this.props.File(link, node, flagsNum, this.newFdNumber());
        this.fds[file.fd] = file;
        this.openFiles++;
        if (flagsNum & O_TRUNC)
            file.truncate();
        return file;
    };
    Volume.prototype.openFile = function (filename, flagsNum, modeNum, resolveSymlinks) {
        if (resolveSymlinks === void 0) { resolveSymlinks = true; }
        var steps = filenameToSteps(filename);
        var link = resolveSymlinks ? this.getResolvedLink(steps) : this.getLink(steps);
        // Try creating a new file, if it does not exist.
        if (!link && flagsNum & O_CREAT) {
            // const dirLink: Link = this.getLinkParent(steps);
            var dirLink = this.getResolvedLink(steps.slice(0, steps.length - 1));
            // if(!dirLink) throw createError(ENOENT, 'open', filename);
            if (!dirLink)
                throw createError(ENOENT, 'open', sep + steps.join(sep));
            if (flagsNum & O_CREAT && typeof modeNum === 'number') {
                link = this.createLink(dirLink, steps[steps.length - 1], false, modeNum);
            }
        }
        if (link)
            return this.openLink(link, flagsNum, resolveSymlinks);
        throw createError(ENOENT, 'open', filename);
    };
    Volume.prototype.openBase = function (filename, flagsNum, modeNum, resolveSymlinks) {
        if (resolveSymlinks === void 0) { resolveSymlinks = true; }
        var file = this.openFile(filename, flagsNum, modeNum, resolveSymlinks);
        if (!file)
            throw createError(ENOENT, 'open', filename);
        return file.fd;
    };
    Volume.prototype.openSync = function (path, flags, mode) {
        if (mode === void 0) { mode = 438 /* DEFAULT */; }
        // Validate (1) mode; (2) path; (3) flags - in that order.
        var modeNum = modeToNumber(mode);
        var fileName = pathToFilename(path);
        var flagsNum = flagsToNumber(flags);
        return this.openBase(fileName, flagsNum, modeNum);
    };
    Volume.prototype.open = function (path, flags, a, b) {
        var mode = a;
        var callback = b;
        if (typeof a === 'function') {
            mode = 438 /* DEFAULT */;
            callback = a;
        }
        mode = mode || 438 /* DEFAULT */;
        var modeNum = modeToNumber(mode);
        var fileName = pathToFilename(path);
        var flagsNum = flagsToNumber(flags);
        this.wrapAsync(this.openBase, [fileName, flagsNum, modeNum], callback);
    };
    Volume.prototype.closeFile = function (file) {
        if (!this.fds[file.fd])
            return;
        this.openFiles--;
        delete this.fds[file.fd];
        this.releasedFds.push(file.fd);
    };
    Volume.prototype.closeSync = function (fd) {
        validateFd(fd);
        var file = this.getFileByFdOrThrow(fd, 'close');
        this.closeFile(file);
    };
    Volume.prototype.close = function (fd, callback) {
        validateFd(fd);
        this.wrapAsync(this.closeSync, [fd], callback);
    };
    Volume.prototype.openFileOrGetById = function (id, flagsNum, modeNum) {
        if (typeof id === 'number') {
            var file = this.fds[id];
            if (!file)
                throw createError(ENOENT);
            return file;
        }
        else {
            return this.openFile(pathToFilename(id), flagsNum, modeNum);
        }
    };
    Volume.prototype.readBase = function (fd, buffer, offset, length, position) {
        var file = this.getFileByFdOrThrow(fd);
        return file.read(buffer, Number(offset), Number(length), position);
    };
    Volume.prototype.readSync = function (fd, buffer, offset, length, position) {
        validateFd(fd);
        return this.readBase(fd, buffer, offset, length, position);
    };
    Volume.prototype.read = function (fd, buffer, offset, length, position, callback) {
        var _this = this;
        validateCallback(callback);
        // This `if` branch is from Node.js
        if (length === 0) {
            return process_1.default.nextTick(function () {
                if (callback)
                    callback(null, 0, buffer);
            });
        }
        setImmediate_1.default(function () {
            try {
                var bytes = _this.readBase(fd, buffer, offset, length, position);
                callback(null, bytes, buffer);
            }
            catch (err) {
                callback(err);
            }
        });
    };
    Volume.prototype.readFileBase = function (id, flagsNum, encoding) {
        var result;
        var isUserFd = typeof id === 'number';
        var userOwnsFd = isUserFd && isFd(id);
        var fd;
        if (userOwnsFd)
            fd = id;
        else {
            var filename = pathToFilename(id);
            var steps = filenameToSteps(filename);
            var link = this.getResolvedLink(steps);
            if (link) {
                var node = link.getNode();
                if (node.isDirectory())
                    throw createError(EISDIR, 'open', link.getPath());
            }
            fd = this.openSync(id, flagsNum);
        }
        try {
            result = bufferToEncoding(this.getFileByFdOrThrow(fd).getBuffer(), encoding);
        }
        finally {
            if (!userOwnsFd) {
                this.closeSync(fd);
            }
        }
        return result;
    };
    Volume.prototype.readFileSync = function (file, options) {
        var opts = getReadFileOptions(options);
        var flagsNum = flagsToNumber(opts.flag);
        return this.readFileBase(file, flagsNum, opts.encoding);
    };
    Volume.prototype.readFile = function (id, a, b) {
        var _a = optsAndCbGenerator(getReadFileOptions)(a, b), opts = _a[0], callback = _a[1];
        var flagsNum = flagsToNumber(opts.flag);
        this.wrapAsync(this.readFileBase, [id, flagsNum, opts.encoding], callback);
    };
    Volume.prototype.writeBase = function (fd, buf, offset, length, position) {
        var file = this.getFileByFdOrThrow(fd, 'write');
        return file.write(buf, offset, length, position);
    };
    Volume.prototype.writeSync = function (fd, a, b, c, d) {
        validateFd(fd);
        var encoding;
        var offset;
        var length;
        var position;
        var isBuffer = typeof a !== 'string';
        if (isBuffer) {
            offset = (b || 0) | 0;
            length = c;
            position = d;
        }
        else {
            position = b;
            encoding = c;
        }
        var buf = dataToBuffer(a, encoding);
        if (isBuffer) {
            if (typeof length === 'undefined') {
                length = buf.length;
            }
        }
        else {
            offset = 0;
            length = buf.length;
        }
        return this.writeBase(fd, buf, offset, length, position);
    };
    Volume.prototype.write = function (fd, a, b, c, d, e) {
        var _this = this;
        validateFd(fd);
        var offset;
        var length;
        var position;
        var encoding;
        var callback;
        var tipa = typeof a;
        var tipb = typeof b;
        var tipc = typeof c;
        var tipd = typeof d;
        if (tipa !== 'string') {
            if (tipb === 'function') {
                callback = b;
            }
            else if (tipc === 'function') {
                offset = b | 0;
                callback = c;
            }
            else if (tipd === 'function') {
                offset = b | 0;
                length = c;
                callback = d;
            }
            else {
                offset = b | 0;
                length = c;
                position = d;
                callback = e;
            }
        }
        else {
            if (tipb === 'function') {
                callback = b;
            }
            else if (tipc === 'function') {
                position = b;
                callback = c;
            }
            else if (tipd === 'function') {
                position = b;
                encoding = c;
                callback = d;
            }
        }
        var buf = dataToBuffer(a, encoding);
        if (tipa !== 'string') {
            if (typeof length === 'undefined')
                length = buf.length;
        }
        else {
            offset = 0;
            length = buf.length;
        }
        var cb = validateCallback(callback);
        setImmediate_1.default(function () {
            try {
                var bytes = _this.writeBase(fd, buf, offset, length, position);
                if (tipa !== 'string') {
                    cb(null, bytes, buf);
                }
                else {
                    cb(null, bytes, a);
                }
            }
            catch (err) {
                cb(err);
            }
        });
    };
    Volume.prototype.writeFileBase = function (id, buf, flagsNum, modeNum) {
        // console.log('writeFileBase', id, buf, flagsNum, modeNum);
        // const node = this.getNodeByIdOrCreate(id, flagsNum, modeNum);
        // node.setBuffer(buf);
        var isUserFd = typeof id === 'number';
        var fd;
        if (isUserFd)
            fd = id;
        else {
            fd = this.openBase(pathToFilename(id), flagsNum, modeNum);
            // fd = this.openSync(id as PathLike, flagsNum, modeNum);
        }
        var offset = 0;
        var length = buf.length;
        var position = flagsNum & O_APPEND ? undefined : 0;
        try {
            while (length > 0) {
                var written = this.writeSync(fd, buf, offset, length, position);
                offset += written;
                length -= written;
                if (position !== undefined)
                    position += written;
            }
        }
        finally {
            if (!isUserFd)
                this.closeSync(fd);
        }
    };
    Volume.prototype.writeFileSync = function (id, data, options) {
        var opts = getWriteFileOptions(options);
        var flagsNum = flagsToNumber(opts.flag);
        var modeNum = modeToNumber(opts.mode);
        var buf = dataToBuffer(data, opts.encoding);
        this.writeFileBase(id, buf, flagsNum, modeNum);
    };
    Volume.prototype.writeFile = function (id, data, a, b) {
        var options = a;
        var callback = b;
        if (typeof a === 'function') {
            options = writeFileDefaults;
            callback = a;
        }
        var cb = validateCallback(callback);
        var opts = getWriteFileOptions(options);
        var flagsNum = flagsToNumber(opts.flag);
        var modeNum = modeToNumber(opts.mode);
        var buf = dataToBuffer(data, opts.encoding);
        this.wrapAsync(this.writeFileBase, [id, buf, flagsNum, modeNum], cb);
    };
    Volume.prototype.linkBase = function (filename1, filename2) {
        var steps1 = filenameToSteps(filename1);
        var link1 = this.getLink(steps1);
        if (!link1)
            throw createError(ENOENT, 'link', filename1, filename2);
        var steps2 = filenameToSteps(filename2);
        // Check new link directory exists.
        var dir2 = this.getLinkParent(steps2);
        if (!dir2)
            throw createError(ENOENT, 'link', filename1, filename2);
        var name = steps2[steps2.length - 1];
        // Check if new file already exists.
        if (dir2.getChild(name))
            throw createError(EEXIST, 'link', filename1, filename2);
        var node = link1.getNode();
        node.nlink++;
        dir2.createChild(name, node);
    };
    Volume.prototype.copyFileBase = function (src, dest, flags) {
        var buf = this.readFileSync(src);
        if (flags & COPYFILE_EXCL) {
            if (this.existsSync(dest)) {
                throw createError(EEXIST, 'copyFile', src, dest);
            }
        }
        if (flags & COPYFILE_FICLONE_FORCE) {
            throw createError(ENOSYS, 'copyFile', src, dest);
        }
        this.writeFileBase(dest, buf, FLAGS.w, 438 /* DEFAULT */);
    };
    Volume.prototype.copyFileSync = function (src, dest, flags) {
        var srcFilename = pathToFilename(src);
        var destFilename = pathToFilename(dest);
        return this.copyFileBase(srcFilename, destFilename, (flags || 0) | 0);
    };
    Volume.prototype.copyFile = function (src, dest, a, b) {
        var srcFilename = pathToFilename(src);
        var destFilename = pathToFilename(dest);
        var flags;
        var callback;
        if (typeof a === 'function') {
            flags = 0;
            callback = a;
        }
        else {
            flags = a;
            callback = b;
        }
        validateCallback(callback);
        this.wrapAsync(this.copyFileBase, [srcFilename, destFilename, flags], callback);
    };
    Volume.prototype.linkSync = function (existingPath, newPath) {
        var existingPathFilename = pathToFilename(existingPath);
        var newPathFilename = pathToFilename(newPath);
        this.linkBase(existingPathFilename, newPathFilename);
    };
    Volume.prototype.link = function (existingPath, newPath, callback) {
        var existingPathFilename = pathToFilename(existingPath);
        var newPathFilename = pathToFilename(newPath);
        this.wrapAsync(this.linkBase, [existingPathFilename, newPathFilename], callback);
    };
    Volume.prototype.unlinkBase = function (filename) {
        var steps = filenameToSteps(filename);
        var link = this.getLink(steps);
        if (!link)
            throw createError(ENOENT, 'unlink', filename);
        // TODO: Check if it is file, dir, other...
        if (link.length)
            throw Error('Dir not empty...');
        this.deleteLink(link);
        var node = link.getNode();
        node.nlink--;
        // When all hard links to i-node are deleted, remove the i-node, too.
        if (node.nlink <= 0) {
            this.deleteNode(node);
        }
    };
    Volume.prototype.unlinkSync = function (path) {
        var filename = pathToFilename(path);
        this.unlinkBase(filename);
    };
    Volume.prototype.unlink = function (path, callback) {
        var filename = pathToFilename(path);
        this.wrapAsync(this.unlinkBase, [filename], callback);
    };
    Volume.prototype.symlinkBase = function (targetFilename, pathFilename) {
        var pathSteps = filenameToSteps(pathFilename);
        // Check if directory exists, where we about to create a symlink.
        var dirLink = this.getLinkParent(pathSteps);
        if (!dirLink)
            throw createError(ENOENT, 'symlink', targetFilename, pathFilename);
        var name = pathSteps[pathSteps.length - 1];
        // Check if new file already exists.
        if (dirLink.getChild(name))
            throw createError(EEXIST, 'symlink', targetFilename, pathFilename);
        // Create symlink.
        var symlink = dirLink.createChild(name);
        symlink.getNode().makeSymlink(filenameToSteps(targetFilename));
        return symlink;
    };
    // `type` argument works only on Windows.
    Volume.prototype.symlinkSync = function (target, path, type) {
        var targetFilename = pathToFilename(target);
        var pathFilename = pathToFilename(path);
        this.symlinkBase(targetFilename, pathFilename);
    };
    Volume.prototype.symlink = function (target, path, a, b) {
        var callback = validateCallback(typeof a === 'function' ? a : b);
        var targetFilename = pathToFilename(target);
        var pathFilename = pathToFilename(path);
        this.wrapAsync(this.symlinkBase, [targetFilename, pathFilename], callback);
    };
    Volume.prototype.realpathBase = function (filename, encoding) {
        var steps = filenameToSteps(filename);
        var realLink = this.getResolvedLink(steps);
        if (!realLink)
            throw createError(ENOENT, 'realpath', filename);
        return encoding_1.strToEncoding(realLink.getPath(), encoding);
    };
    Volume.prototype.realpathSync = function (path, options) {
        return this.realpathBase(pathToFilename(path), getRealpathOptions(options).encoding);
    };
    Volume.prototype.realpath = function (path, a, b) {
        var _a = getRealpathOptsAndCb(a, b), opts = _a[0], callback = _a[1];
        var pathFilename = pathToFilename(path);
        this.wrapAsync(this.realpathBase, [pathFilename, opts.encoding], callback);
    };
    Volume.prototype.lstatBase = function (filename, bigint) {
        if (bigint === void 0) { bigint = false; }
        var link = this.getLink(filenameToSteps(filename));
        if (!link)
            throw createError(ENOENT, 'lstat', filename);
        return Stats_1.default.build(link.getNode(), bigint);
    };
    Volume.prototype.lstatSync = function (path, options) {
        return this.lstatBase(pathToFilename(path), getStatOptions(options).bigint);
    };
    Volume.prototype.lstat = function (path, a, b) {
        var _a = getStatOptsAndCb(a, b), opts = _a[0], callback = _a[1];
        this.wrapAsync(this.lstatBase, [pathToFilename(path), opts.bigint], callback);
    };
    Volume.prototype.statBase = function (filename, bigint) {
        if (bigint === void 0) { bigint = false; }
        var link = this.getResolvedLink(filenameToSteps(filename));
        if (!link)
            throw createError(ENOENT, 'stat', filename);
        return Stats_1.default.build(link.getNode(), bigint);
    };
    Volume.prototype.statSync = function (path, options) {
        return this.statBase(pathToFilename(path), getStatOptions(options).bigint);
    };
    Volume.prototype.stat = function (path, a, b) {
        var _a = getStatOptsAndCb(a, b), opts = _a[0], callback = _a[1];
        this.wrapAsync(this.statBase, [pathToFilename(path), opts.bigint], callback);
    };
    Volume.prototype.fstatBase = function (fd, bigint) {
        if (bigint === void 0) { bigint = false; }
        var file = this.getFileByFd(fd);
        if (!file)
            throw createError(EBADF, 'fstat');
        return Stats_1.default.build(file.node, bigint);
    };
    Volume.prototype.fstatSync = function (fd, options) {
        return this.fstatBase(fd, getStatOptions(options).bigint);
    };
    Volume.prototype.fstat = function (fd, a, b) {
        var _a = getStatOptsAndCb(a, b), opts = _a[0], callback = _a[1];
        this.wrapAsync(this.fstatBase, [fd, opts.bigint], callback);
    };
    Volume.prototype.renameBase = function (oldPathFilename, newPathFilename) {
        var link = this.getLink(filenameToSteps(oldPathFilename));
        if (!link)
            throw createError(ENOENT, 'rename', oldPathFilename, newPathFilename);
        // TODO: Check if it is directory, if non-empty, we cannot move it, right?
        var newPathSteps = filenameToSteps(newPathFilename);
        // Check directory exists for the new location.
        var newPathDirLink = this.getLinkParent(newPathSteps);
        if (!newPathDirLink)
            throw createError(ENOENT, 'rename', oldPathFilename, newPathFilename);
        // TODO: Also treat cases with directories and symbolic links.
        // TODO: See: http://man7.org/linux/man-pages/man2/rename.2.html
        // Remove hard link from old folder.
        var oldLinkParent = link.parent;
        if (oldLinkParent) {
            oldLinkParent.deleteChild(link);
        }
        // Rename should overwrite the new path, if that exists.
        var name = newPathSteps[newPathSteps.length - 1];
        link.steps = __spreadArrays(newPathDirLink.steps, [name]);
        newPathDirLink.setChild(link.getName(), link);
    };
    Volume.prototype.renameSync = function (oldPath, newPath) {
        var oldPathFilename = pathToFilename(oldPath);
        var newPathFilename = pathToFilename(newPath);
        this.renameBase(oldPathFilename, newPathFilename);
    };
    Volume.prototype.rename = function (oldPath, newPath, callback) {
        var oldPathFilename = pathToFilename(oldPath);
        var newPathFilename = pathToFilename(newPath);
        this.wrapAsync(this.renameBase, [oldPathFilename, newPathFilename], callback);
    };
    Volume.prototype.existsBase = function (filename) {
        return !!this.statBase(filename);
    };
    Volume.prototype.existsSync = function (path) {
        try {
            return this.existsBase(pathToFilename(path));
        }
        catch (err) {
            return false;
        }
    };
    Volume.prototype.exists = function (path, callback) {
        var _this = this;
        var filename = pathToFilename(path);
        if (typeof callback !== 'function')
            throw Error(ERRSTR.CB);
        setImmediate_1.default(function () {
            try {
                callback(_this.existsBase(filename));
            }
            catch (err) {
                callback(false);
            }
        });
    };
    Volume.prototype.accessBase = function (filename, mode) {
        var link = this.getLinkOrThrow(filename, 'access');
        // TODO: Verify permissions
    };
    Volume.prototype.accessSync = function (path, mode) {
        if (mode === void 0) { mode = F_OK; }
        var filename = pathToFilename(path);
        mode = mode | 0;
        this.accessBase(filename, mode);
    };
    Volume.prototype.access = function (path, a, b) {
        var mode = F_OK;
        var callback;
        if (typeof a !== 'function') {
            mode = a | 0; // cast to number
            callback = validateCallback(b);
        }
        else {
            callback = a;
        }
        var filename = pathToFilename(path);
        this.wrapAsync(this.accessBase, [filename, mode], callback);
    };
    Volume.prototype.appendFileSync = function (id, data, options) {
        if (options === void 0) { options = appendFileDefaults; }
        var opts = getAppendFileOpts(options);
        // force append behavior when using a supplied file descriptor
        if (!opts.flag || isFd(id))
            opts.flag = 'a';
        this.writeFileSync(id, data, opts);
    };
    Volume.prototype.appendFile = function (id, data, a, b) {
        var _a = getAppendFileOptsAndCb(a, b), opts = _a[0], callback = _a[1];
        // force append behavior when using a supplied file descriptor
        if (!opts.flag || isFd(id))
            opts.flag = 'a';
        this.writeFile(id, data, opts, callback);
    };
    Volume.prototype.readdirBase = function (filename, options) {
        var steps = filenameToSteps(filename);
        var link = this.getResolvedLink(steps);
        if (!link)
            throw createError(ENOENT, 'readdir', filename);
        var node = link.getNode();
        if (!node.isDirectory())
            throw createError(ENOTDIR, 'scandir', filename);
        if (options.withFileTypes) {
            var list_1 = [];
            for (var name_3 in link.children) {
                var child = link.getChild(name_3);
                if (!child) {
                    continue;
                }
                list_1.push(Dirent_1.default.build(child, options.encoding));
            }
            if (!isWin && options.encoding !== 'buffer')
                list_1.sort(function (a, b) {
                    if (a.name < b.name)
                        return -1;
                    if (a.name > b.name)
                        return 1;
                    return 0;
                });
            return list_1;
        }
        var list = [];
        for (var name_4 in link.children) {
            list.push(encoding_1.strToEncoding(name_4, options.encoding));
        }
        if (!isWin && options.encoding !== 'buffer')
            list.sort();
        return list;
    };
    Volume.prototype.readdirSync = function (path, options) {
        var opts = getReaddirOptions(options);
        var filename = pathToFilename(path);
        return this.readdirBase(filename, opts);
    };
    Volume.prototype.readdir = function (path, a, b) {
        var _a = getReaddirOptsAndCb(a, b), options = _a[0], callback = _a[1];
        var filename = pathToFilename(path);
        this.wrapAsync(this.readdirBase, [filename, options], callback);
    };
    Volume.prototype.readlinkBase = function (filename, encoding) {
        var link = this.getLinkOrThrow(filename, 'readlink');
        var node = link.getNode();
        if (!node.isSymlink())
            throw createError(EINVAL, 'readlink', filename);
        var str = sep + node.symlink.join(sep);
        return encoding_1.strToEncoding(str, encoding);
    };
    Volume.prototype.readlinkSync = function (path, options) {
        var opts = getDefaultOpts(options);
        var filename = pathToFilename(path);
        return this.readlinkBase(filename, opts.encoding);
    };
    Volume.prototype.readlink = function (path, a, b) {
        var _a = getDefaultOptsAndCb(a, b), opts = _a[0], callback = _a[1];
        var filename = pathToFilename(path);
        this.wrapAsync(this.readlinkBase, [filename, opts.encoding], callback);
    };
    Volume.prototype.fsyncBase = function (fd) {
        this.getFileByFdOrThrow(fd, 'fsync');
    };
    Volume.prototype.fsyncSync = function (fd) {
        this.fsyncBase(fd);
    };
    Volume.prototype.fsync = function (fd, callback) {
        this.wrapAsync(this.fsyncBase, [fd], callback);
    };
    Volume.prototype.fdatasyncBase = function (fd) {
        this.getFileByFdOrThrow(fd, 'fdatasync');
    };
    Volume.prototype.fdatasyncSync = function (fd) {
        this.fdatasyncBase(fd);
    };
    Volume.prototype.fdatasync = function (fd, callback) {
        this.wrapAsync(this.fdatasyncBase, [fd], callback);
    };
    Volume.prototype.ftruncateBase = function (fd, len) {
        var file = this.getFileByFdOrThrow(fd, 'ftruncate');
        file.truncate(len);
    };
    Volume.prototype.ftruncateSync = function (fd, len) {
        this.ftruncateBase(fd, len);
    };
    Volume.prototype.ftruncate = function (fd, a, b) {
        var len = typeof a === 'number' ? a : 0;
        var callback = validateCallback(typeof a === 'number' ? b : a);
        this.wrapAsync(this.ftruncateBase, [fd, len], callback);
    };
    Volume.prototype.truncateBase = function (path, len) {
        var fd = this.openSync(path, 'r+');
        try {
            this.ftruncateSync(fd, len);
        }
        finally {
            this.closeSync(fd);
        }
    };
    Volume.prototype.truncateSync = function (id, len) {
        if (isFd(id))
            return this.ftruncateSync(id, len);
        this.truncateBase(id, len);
    };
    Volume.prototype.truncate = function (id, a, b) {
        var len = typeof a === 'number' ? a : 0;
        var callback = validateCallback(typeof a === 'number' ? b : a);
        if (isFd(id))
            return this.ftruncate(id, len, callback);
        this.wrapAsync(this.truncateBase, [id, len], callback);
    };
    Volume.prototype.futimesBase = function (fd, atime, mtime) {
        var file = this.getFileByFdOrThrow(fd, 'futimes');
        var node = file.node;
        node.atime = new Date(atime * 1000);
        node.mtime = new Date(mtime * 1000);
    };
    Volume.prototype.futimesSync = function (fd, atime, mtime) {
        this.futimesBase(fd, toUnixTimestamp(atime), toUnixTimestamp(mtime));
    };
    Volume.prototype.futimes = function (fd, atime, mtime, callback) {
        this.wrapAsync(this.futimesBase, [fd, toUnixTimestamp(atime), toUnixTimestamp(mtime)], callback);
    };
    Volume.prototype.utimesBase = function (filename, atime, mtime) {
        var fd = this.openSync(filename, 'r+');
        try {
            this.futimesBase(fd, atime, mtime);
        }
        finally {
            this.closeSync(fd);
        }
    };
    Volume.prototype.utimesSync = function (path, atime, mtime) {
        this.utimesBase(pathToFilename(path), toUnixTimestamp(atime), toUnixTimestamp(mtime));
    };
    Volume.prototype.utimes = function (path, atime, mtime, callback) {
        this.wrapAsync(this.utimesBase, [pathToFilename(path), toUnixTimestamp(atime), toUnixTimestamp(mtime)], callback);
    };
    Volume.prototype.mkdirBase = function (filename, modeNum) {
        var steps = filenameToSteps(filename);
        // This will throw if user tries to create root dir `fs.mkdirSync('/')`.
        if (!steps.length) {
            throw createError(EEXIST, 'mkdir', filename);
        }
        var dir = this.getLinkParentAsDirOrThrow(filename, 'mkdir');
        // Check path already exists.
        var name = steps[steps.length - 1];
        if (dir.getChild(name))
            throw createError(EEXIST, 'mkdir', filename);
        dir.createChild(name, this.createNode(true, modeNum));
    };
    /**
     * Creates directory tree recursively.
     * @param filename
     * @param modeNum
     */
    Volume.prototype.mkdirpBase = function (filename, modeNum) {
        var steps = filenameToSteps(filename);
        var link = this.root;
        for (var i = 0; i < steps.length; i++) {
            var step = steps[i];
            if (!link.getNode().isDirectory())
                throw createError(ENOTDIR, 'mkdir', link.getPath());
            var child = link.getChild(step);
            if (child) {
                if (child.getNode().isDirectory())
                    link = child;
                else
                    throw createError(ENOTDIR, 'mkdir', child.getPath());
            }
            else {
                link = link.createChild(step, this.createNode(true, modeNum));
            }
        }
    };
    Volume.prototype.mkdirSync = function (path, options) {
        var opts = getMkdirOptions(options);
        var modeNum = modeToNumber(opts.mode, 511);
        var filename = pathToFilename(path);
        if (opts.recursive)
            this.mkdirpBase(filename, modeNum);
        else
            this.mkdirBase(filename, modeNum);
    };
    Volume.prototype.mkdir = function (path, a, b) {
        var opts = getMkdirOptions(a);
        var callback = validateCallback(typeof a === 'function' ? a : b);
        var modeNum = modeToNumber(opts.mode, 511);
        var filename = pathToFilename(path);
        if (opts.recursive)
            this.wrapAsync(this.mkdirpBase, [filename, modeNum], callback);
        else
            this.wrapAsync(this.mkdirBase, [filename, modeNum], callback);
    };
    // legacy interface
    Volume.prototype.mkdirpSync = function (path, mode) {
        this.mkdirSync(path, { mode: mode, recursive: true });
    };
    Volume.prototype.mkdirp = function (path, a, b) {
        var mode = typeof a === 'function' ? undefined : a;
        var callback = validateCallback(typeof a === 'function' ? a : b);
        this.mkdir(path, { mode: mode, recursive: true }, callback);
    };
    Volume.prototype.mkdtempBase = function (prefix, encoding, retry) {
        if (retry === void 0) { retry = 5; }
        var filename = prefix + this.genRndStr();
        try {
            this.mkdirBase(filename, 511 /* DIR */);
            return encoding_1.strToEncoding(filename, encoding);
        }
        catch (err) {
            if (err.code === EEXIST) {
                if (retry > 1)
                    return this.mkdtempBase(prefix, encoding, retry - 1);
                else
                    throw Error('Could not create temp dir.');
            }
            else
                throw err;
        }
    };
    Volume.prototype.mkdtempSync = function (prefix, options) {
        var encoding = getDefaultOpts(options).encoding;
        if (!prefix || typeof prefix !== 'string')
            throw new TypeError('filename prefix is required');
        nullCheck(prefix);
        return this.mkdtempBase(prefix, encoding);
    };
    Volume.prototype.mkdtemp = function (prefix, a, b) {
        var _a = getDefaultOptsAndCb(a, b), encoding = _a[0].encoding, callback = _a[1];
        if (!prefix || typeof prefix !== 'string')
            throw new TypeError('filename prefix is required');
        if (!nullCheck(prefix))
            return;
        this.wrapAsync(this.mkdtempBase, [prefix, encoding], callback);
    };
    Volume.prototype.rmdirBase = function (filename, options) {
        var opts = getRmdirOptions(options);
        var link = this.getLinkAsDirOrThrow(filename, 'rmdir');
        // Check directory is empty.
        if (link.length && !opts.recursive)
            throw createError(ENOTEMPTY, 'rmdir', filename);
        this.deleteLink(link);
    };
    Volume.prototype.rmdirSync = function (path, options) {
        this.rmdirBase(pathToFilename(path), options);
    };
    Volume.prototype.rmdir = function (path, a, b) {
        var opts = getRmdirOptions(a);
        var callback = validateCallback(typeof a === 'function' ? a : b);
        this.wrapAsync(this.rmdirBase, [pathToFilename(path), opts], callback);
    };
    Volume.prototype.fchmodBase = function (fd, modeNum) {
        var file = this.getFileByFdOrThrow(fd, 'fchmod');
        file.chmod(modeNum);
    };
    Volume.prototype.fchmodSync = function (fd, mode) {
        this.fchmodBase(fd, modeToNumber(mode));
    };
    Volume.prototype.fchmod = function (fd, mode, callback) {
        this.wrapAsync(this.fchmodBase, [fd, modeToNumber(mode)], callback);
    };
    Volume.prototype.chmodBase = function (filename, modeNum) {
        var fd = this.openSync(filename, 'r+');
        try {
            this.fchmodBase(fd, modeNum);
        }
        finally {
            this.closeSync(fd);
        }
    };
    Volume.prototype.chmodSync = function (path, mode) {
        var modeNum = modeToNumber(mode);
        var filename = pathToFilename(path);
        this.chmodBase(filename, modeNum);
    };
    Volume.prototype.chmod = function (path, mode, callback) {
        var modeNum = modeToNumber(mode);
        var filename = pathToFilename(path);
        this.wrapAsync(this.chmodBase, [filename, modeNum], callback);
    };
    Volume.prototype.lchmodBase = function (filename, modeNum) {
        var fd = this.openBase(filename, O_RDWR, 0, false);
        try {
            this.fchmodBase(fd, modeNum);
        }
        finally {
            this.closeSync(fd);
        }
    };
    Volume.prototype.lchmodSync = function (path, mode) {
        var modeNum = modeToNumber(mode);
        var filename = pathToFilename(path);
        this.lchmodBase(filename, modeNum);
    };
    Volume.prototype.lchmod = function (path, mode, callback) {
        var modeNum = modeToNumber(mode);
        var filename = pathToFilename(path);
        this.wrapAsync(this.lchmodBase, [filename, modeNum], callback);
    };
    Volume.prototype.fchownBase = function (fd, uid, gid) {
        this.getFileByFdOrThrow(fd, 'fchown').chown(uid, gid);
    };
    Volume.prototype.fchownSync = function (fd, uid, gid) {
        validateUid(uid);
        validateGid(gid);
        this.fchownBase(fd, uid, gid);
    };
    Volume.prototype.fchown = function (fd, uid, gid, callback) {
        validateUid(uid);
        validateGid(gid);
        this.wrapAsync(this.fchownBase, [fd, uid, gid], callback);
    };
    Volume.prototype.chownBase = function (filename, uid, gid) {
        var link = this.getResolvedLinkOrThrow(filename, 'chown');
        var node = link.getNode();
        node.chown(uid, gid);
        // if(node.isFile() || node.isSymlink()) {
        //
        // } else if(node.isDirectory()) {
        //
        // } else {
        // TODO: What do we do here?
        // }
    };
    Volume.prototype.chownSync = function (path, uid, gid) {
        validateUid(uid);
        validateGid(gid);
        this.chownBase(pathToFilename(path), uid, gid);
    };
    Volume.prototype.chown = function (path, uid, gid, callback) {
        validateUid(uid);
        validateGid(gid);
        this.wrapAsync(this.chownBase, [pathToFilename(path), uid, gid], callback);
    };
    Volume.prototype.lchownBase = function (filename, uid, gid) {
        this.getLinkOrThrow(filename, 'lchown')
            .getNode()
            .chown(uid, gid);
    };
    Volume.prototype.lchownSync = function (path, uid, gid) {
        validateUid(uid);
        validateGid(gid);
        this.lchownBase(pathToFilename(path), uid, gid);
    };
    Volume.prototype.lchown = function (path, uid, gid, callback) {
        validateUid(uid);
        validateGid(gid);
        this.wrapAsync(this.lchownBase, [pathToFilename(path), uid, gid], callback);
    };
    Volume.prototype.watchFile = function (path, a, b) {
        var filename = pathToFilename(path);
        var options = a;
        var listener = b;
        if (typeof options === 'function') {
            listener = a;
            options = null;
        }
        if (typeof listener !== 'function') {
            throw Error('"watchFile()" requires a listener function');
        }
        var interval = 5007;
        var persistent = true;
        if (options && typeof options === 'object') {
            if (typeof options.interval === 'number')
                interval = options.interval;
            if (typeof options.persistent === 'boolean')
                persistent = options.persistent;
        }
        var watcher = this.statWatchers[filename];
        if (!watcher) {
            watcher = new this.StatWatcher();
            watcher.start(filename, persistent, interval);
            this.statWatchers[filename] = watcher;
        }
        watcher.addListener('change', listener);
        return watcher;
    };
    Volume.prototype.unwatchFile = function (path, listener) {
        var filename = pathToFilename(path);
        var watcher = this.statWatchers[filename];
        if (!watcher)
            return;
        if (typeof listener === 'function') {
            watcher.removeListener('change', listener);
        }
        else {
            watcher.removeAllListeners('change');
        }
        if (watcher.listenerCount('change') === 0) {
            watcher.stop();
            delete this.statWatchers[filename];
        }
    };
    Volume.prototype.createReadStream = function (path, options) {
        return new this.ReadStream(path, options);
    };
    Volume.prototype.createWriteStream = function (path, options) {
        return new this.WriteStream(path, options);
    };
    // watch(path: PathLike): FSWatcher;
    // watch(path: PathLike, options?: IWatchOptions | string): FSWatcher;
    Volume.prototype.watch = function (path, options, listener) {
        var filename = pathToFilename(path);
        var givenOptions = options;
        if (typeof options === 'function') {
            listener = options;
            givenOptions = null;
        }
        // tslint:disable-next-line prefer-const
        var _a = getDefaultOpts(givenOptions), persistent = _a.persistent, recursive = _a.recursive, encoding = _a.encoding;
        if (persistent === undefined)
            persistent = true;
        if (recursive === undefined)
            recursive = false;
        var watcher = new this.FSWatcher();
        watcher.start(filename, persistent, recursive, encoding);
        if (listener) {
            watcher.addListener('change', listener);
        }
        return watcher;
    };
    /**
     * Global file descriptor counter. UNIX file descriptors start from 0 and go sequentially
     * up, so here, in order not to conflict with them, we choose some big number and descrease
     * the file descriptor of every new opened file.
     * @type {number}
     * @todo This should not be static, right?
     */
    Volume.fd = 0x7fffffff;
    return Volume;
}());
exports.Volume = Volume;
function emitStop(self) {
    self.emit('stop');
}
var StatWatcher = /** @class */ (function (_super) {
    __extends(StatWatcher, _super);
    function StatWatcher(vol) {
        var _this = _super.call(this) || this;
        _this.onInterval = function () {
            try {
                var stats = _this.vol.statSync(_this.filename);
                if (_this.hasChanged(stats)) {
                    _this.emit('change', stats, _this.prev);
                    _this.prev = stats;
                }
            }
            finally {
                _this.loop();
            }
        };
        _this.vol = vol;
        return _this;
    }
    StatWatcher.prototype.loop = function () {
        this.timeoutRef = this.setTimeout(this.onInterval, this.interval);
    };
    StatWatcher.prototype.hasChanged = function (stats) {
        // if(!this.prev) return false;
        if (stats.mtimeMs > this.prev.mtimeMs)
            return true;
        if (stats.nlink !== this.prev.nlink)
            return true;
        return false;
    };
    StatWatcher.prototype.start = function (path, persistent, interval) {
        if (persistent === void 0) { persistent = true; }
        if (interval === void 0) { interval = 5007; }
        this.filename = pathToFilename(path);
        this.setTimeout = persistent ? setTimeout : setTimeoutUnref_1.default;
        this.interval = interval;
        this.prev = this.vol.statSync(this.filename);
        this.loop();
    };
    StatWatcher.prototype.stop = function () {
        clearTimeout(this.timeoutRef);
        process_1.default.nextTick(emitStop, this);
    };
    return StatWatcher;
}(events_1.EventEmitter));
exports.StatWatcher = StatWatcher;
var pool;
function allocNewPool(poolSize) {
    pool = buffer_1.bufferAllocUnsafe(poolSize);
    pool.used = 0;
}
util.inherits(FsReadStream, stream_1.Readable);
exports.ReadStream = FsReadStream;
function FsReadStream(vol, path, options) {
    if (!(this instanceof FsReadStream))
        return new FsReadStream(vol, path, options);
    this._vol = vol;
    // a little bit bigger buffer and water marks by default
    options = Object.assign({}, getOptions(options, {}));
    if (options.highWaterMark === undefined)
        options.highWaterMark = 64 * 1024;
    stream_1.Readable.call(this, options);
    this.path = pathToFilename(path);
    this.fd = options.fd === undefined ? null : options.fd;
    this.flags = options.flags === undefined ? 'r' : options.flags;
    this.mode = options.mode === undefined ? 438 : options.mode;
    this.start = options.start;
    this.end = options.end;
    this.autoClose = options.autoClose === undefined ? true : options.autoClose;
    this.pos = undefined;
    this.bytesRead = 0;
    if (this.start !== undefined) {
        if (typeof this.start !== 'number') {
            throw new TypeError('"start" option must be a Number');
        }
        if (this.end === undefined) {
            this.end = Infinity;
        }
        else if (typeof this.end !== 'number') {
            throw new TypeError('"end" option must be a Number');
        }
        if (this.start > this.end) {
            throw new Error('"start" option must be <= "end" option');
        }
        this.pos = this.start;
    }
    if (typeof this.fd !== 'number')
        this.open();
    this.on('end', function () {
        if (this.autoClose) {
            if (this.destroy)
                this.destroy();
        }
    });
}
FsReadStream.prototype.open = function () {
    var self = this; // tslint:disable-line no-this-assignment
    this._vol.open(this.path, this.flags, this.mode, function (er, fd) {
        if (er) {
            if (self.autoClose) {
                if (self.destroy)
                    self.destroy();
            }
            self.emit('error', er);
            return;
        }
        self.fd = fd;
        self.emit('open', fd);
        // start the flow of data.
        self.read();
    });
};
FsReadStream.prototype._read = function (n) {
    if (typeof this.fd !== 'number') {
        return this.once('open', function () {
            this._read(n);
        });
    }
    if (this.destroyed)
        return;
    if (!pool || pool.length - pool.used < kMinPoolSpace) {
        // discard the old pool.
        allocNewPool(this._readableState.highWaterMark);
    }
    // Grab another reference to the pool in the case that while we're
    // in the thread pool another read() finishes up the pool, and
    // allocates a new one.
    var thisPool = pool;
    var toRead = Math.min(pool.length - pool.used, n);
    var start = pool.used;
    if (this.pos !== undefined)
        toRead = Math.min(this.end - this.pos + 1, toRead);
    // already read everything we were supposed to read!
    // treat as EOF.
    if (toRead <= 0)
        return this.push(null);
    // the actual read.
    var self = this; // tslint:disable-line no-this-assignment
    this._vol.read(this.fd, pool, pool.used, toRead, this.pos, onread);
    // move the pool positions, and internal position for reading.
    if (this.pos !== undefined)
        this.pos += toRead;
    pool.used += toRead;
    function onread(er, bytesRead) {
        if (er) {
            if (self.autoClose && self.destroy) {
                self.destroy();
            }
            self.emit('error', er);
        }
        else {
            var b = null;
            if (bytesRead > 0) {
                self.bytesRead += bytesRead;
                b = thisPool.slice(start, start + bytesRead);
            }
            self.push(b);
        }
    }
};
FsReadStream.prototype._destroy = function (err, cb) {
    this.close(function (err2) {
        cb(err || err2);
    });
};
FsReadStream.prototype.close = function (cb) {
    var _this = this;
    if (cb)
        this.once('close', cb);
    if (this.closed || typeof this.fd !== 'number') {
        if (typeof this.fd !== 'number') {
            this.once('open', closeOnOpen);
            return;
        }
        return process_1.default.nextTick(function () { return _this.emit('close'); });
    }
    this.closed = true;
    this._vol.close(this.fd, function (er) {
        if (er)
            _this.emit('error', er);
        else
            _this.emit('close');
    });
    this.fd = null;
};
// needed because as it will be called with arguments
// that does not match this.close() signature
function closeOnOpen(fd) {
    this.close();
}
util.inherits(FsWriteStream, stream_1.Writable);
exports.WriteStream = FsWriteStream;
function FsWriteStream(vol, path, options) {
    if (!(this instanceof FsWriteStream))
        return new FsWriteStream(vol, path, options);
    this._vol = vol;
    options = Object.assign({}, getOptions(options, {}));
    stream_1.Writable.call(this, options);
    this.path = pathToFilename(path);
    this.fd = options.fd === undefined ? null : options.fd;
    this.flags = options.flags === undefined ? 'w' : options.flags;
    this.mode = options.mode === undefined ? 438 : options.mode;
    this.start = options.start;
    this.autoClose = options.autoClose === undefined ? true : !!options.autoClose;
    this.pos = undefined;
    this.bytesWritten = 0;
    if (this.start !== undefined) {
        if (typeof this.start !== 'number') {
            throw new TypeError('"start" option must be a Number');
        }
        if (this.start < 0) {
            throw new Error('"start" must be >= zero');
        }
        this.pos = this.start;
    }
    if (options.encoding)
        this.setDefaultEncoding(options.encoding);
    if (typeof this.fd !== 'number')
        this.open();
    // dispose on finish.
    this.once('finish', function () {
        if (this.autoClose) {
            this.close();
        }
    });
}
FsWriteStream.prototype.open = function () {
    this._vol.open(this.path, this.flags, this.mode, function (er, fd) {
        if (er) {
            if (this.autoClose && this.destroy) {
                this.destroy();
            }
            this.emit('error', er);
            return;
        }
        this.fd = fd;
        this.emit('open', fd);
    }.bind(this));
};
FsWriteStream.prototype._write = function (data, encoding, cb) {
    if (!(data instanceof buffer_1.Buffer))
        return this.emit('error', new Error('Invalid data'));
    if (typeof this.fd !== 'number') {
        return this.once('open', function () {
            this._write(data, encoding, cb);
        });
    }
    var self = this; // tslint:disable-line no-this-assignment
    this._vol.write(this.fd, data, 0, data.length, this.pos, function (er, bytes) {
        if (er) {
            if (self.autoClose && self.destroy) {
                self.destroy();
            }
            return cb(er);
        }
        self.bytesWritten += bytes;
        cb();
    });
    if (this.pos !== undefined)
        this.pos += data.length;
};
FsWriteStream.prototype._writev = function (data, cb) {
    if (typeof this.fd !== 'number') {
        return this.once('open', function () {
            this._writev(data, cb);
        });
    }
    var self = this; // tslint:disable-line no-this-assignment
    var len = data.length;
    var chunks = new Array(len);
    var size = 0;
    for (var i = 0; i < len; i++) {
        var chunk = data[i].chunk;
        chunks[i] = chunk;
        size += chunk.length;
    }
    var buf = buffer_1.Buffer.concat(chunks);
    this._vol.write(this.fd, buf, 0, buf.length, this.pos, function (er, bytes) {
        if (er) {
            if (self.destroy)
                self.destroy();
            return cb(er);
        }
        self.bytesWritten += bytes;
        cb();
    });
    if (this.pos !== undefined)
        this.pos += size;
};
FsWriteStream.prototype._destroy = FsReadStream.prototype._destroy;
FsWriteStream.prototype.close = FsReadStream.prototype.close;
// There is no shutdown() for files.
FsWriteStream.prototype.destroySoon = FsWriteStream.prototype.end;
// ---------------------------------------- FSWatcher
var FSWatcher = /** @class */ (function (_super) {
    __extends(FSWatcher, _super);
    function FSWatcher(vol) {
        var _this = _super.call(this) || this;
        _this._filename = '';
        _this._filenameEncoded = '';
        // _persistent: boolean = true;
        _this._recursive = false;
        _this._encoding = encoding_1.ENCODING_UTF8;
        _this._onNodeChange = function () {
            _this._emit('change');
        };
        _this._onParentChild = function (link) {
            if (link.getName() === _this._getName()) {
                _this._emit('rename');
            }
        };
        _this._emit = function (type) {
            _this.emit('change', type, _this._filenameEncoded);
        };
        _this._persist = function () {
            _this._timer = setTimeout(_this._persist, 1e6);
        };
        _this._vol = vol;
        return _this;
        // TODO: Emit "error" messages when watching.
        // this._handle.onchange = function(status, eventType, filename) {
        //     if (status < 0) {
        //         self._handle.close();
        //         const error = !filename ?
        //             errnoException(status, 'Error watching file for changes:') :
        //             errnoException(status, `Error watching file ${filename} for changes:`);
        //         error.filename = filename;
        //         self.emit('error', error);
        //     } else {
        //         self.emit('change', eventType, filename);
        //     }
        // };
    }
    FSWatcher.prototype._getName = function () {
        return this._steps[this._steps.length - 1];
    };
    FSWatcher.prototype.start = function (path, persistent, recursive, encoding) {
        if (persistent === void 0) { persistent = true; }
        if (recursive === void 0) { recursive = false; }
        if (encoding === void 0) { encoding = encoding_1.ENCODING_UTF8; }
        this._filename = pathToFilename(path);
        this._steps = filenameToSteps(this._filename);
        this._filenameEncoded = encoding_1.strToEncoding(this._filename);
        // this._persistent = persistent;
        this._recursive = recursive;
        this._encoding = encoding;
        try {
            this._link = this._vol.getLinkOrThrow(this._filename, 'FSWatcher');
        }
        catch (err) {
            var error = new Error("watch " + this._filename + " " + err.code);
            error.code = err.code;
            error.errno = err.code;
            throw error;
        }
        this._link.getNode().on('change', this._onNodeChange);
        this._link.on('child:add', this._onNodeChange);
        this._link.on('child:delete', this._onNodeChange);
        var parent = this._link.parent;
        if (parent) {
            // parent.on('child:add', this._onParentChild);
            parent.setMaxListeners(parent.getMaxListeners() + 1);
            parent.on('child:delete', this._onParentChild);
        }
        if (persistent)
            this._persist();
    };
    FSWatcher.prototype.close = function () {
        clearTimeout(this._timer);
        this._link.getNode().removeListener('change', this._onNodeChange);
        var parent = this._link.parent;
        if (parent) {
            // parent.removeListener('child:add', this._onParentChild);
            parent.removeListener('child:delete', this._onParentChild);
        }
    };
    return FSWatcher;
}(events_1.EventEmitter));
exports.FSWatcher = FSWatcher;

cmd: