'use strict';

const uv = process.binding('uv');

const Buffer = require('buffer').Buffer;

const Debug = require('vm').runInDebugContext('Debug');

const internalUtil = require('internal/util');

const formatRegExp = /%[sdj%]/g;

exports.format = function(f) {

if (typeof f !== 'string') {

var objects = [];

for (var i = 0; i < arguments.length; i++) {

objects.push(inspect(arguments[i]));

}

return objects.join(' ');

}

if (arguments.length === 1) return f;

var i = 1;

var args = arguments;

var len = args.length;

var str = String(f).replace(formatRegExp, function(x) {

if (x === '%%') return '%';

if (i >= len) return x;

switch (x) {

case '%s': return String(args[i++]);

case '%d': return Number(args[i++]);

case '%j':

try {

return JSON.stringify(args[i++]);

} catch (_) {

return '[Circular]';

}

// falls through

default:

return x;

}

});

for (var x = args[i]; i < len; x = args[++i]) {

if (x === null || (typeof x !== 'object' && typeof x !== 'symbol')) {

str += ' ' + x;

} else {

str += ' ' + inspect(x);

}

}

return str;

};

exports.deprecate = internalUtil.deprecate;

var debugs = {};

var debugEnviron;

exports.debuglog = function(set) {

if (debugEnviron === undefined)

debugEnviron = process.env.NODE_DEBUG || '';

set = set.toUpperCase();

if (!debugs[set]) {

if (new RegExp('\\b' + set + '\\b', 'i').test(debugEnviron)) {

var pid = process.pid;

debugs[set] = function() {

var msg = exports.format.apply(exports, arguments);

console.error('%s %d: %s', set, pid, msg);

};

} else {

debugs[set] = function() {};

}

}

return debugs[set];

};

/**

* Echos the value of a value. Trys to print the value out

* in the best way possible given the different types.

*

* @param {Object} obj The object to print out.

* @param {Object} opts Optional options object that alters the output.

*/

/* legacy: obj, showHidden, depth, colors*/

function inspect(obj, opts) {

// default options

var ctx = {

seen: [],

stylize: stylizeNoColor

};

// legacy...

if (arguments.length >= 3) ctx.depth = arguments[2];

if (arguments.length >= 4) ctx.colors = arguments[3];

if (typeof opts === 'boolean') {

// legacy...

ctx.showHidden = opts;

} else if (opts) {

// got an "options" object

exports._extend(ctx, opts);

}

// set default options

if (ctx.showHidden === undefined) ctx.showHidden = false;

if (ctx.depth === undefined) ctx.depth = 2;

if (ctx.colors === undefined) ctx.colors = false;

if (ctx.customInspect === undefined) ctx.customInspect = true;

if (ctx.colors) ctx.stylize = stylizeWithColor;

return formatValue(ctx, obj, ctx.depth);

}

exports.inspect = inspect;

// http://en.wikipedia.org/wiki/ANSI_escape_code#graphics

inspect.colors = {

'bold' : [1, 22],

'italic' : [3, 23],

'underline' : [4, 24],

'inverse' : [7, 27],

'white' : [37, 39],

'grey' : [90, 39],

'black' : [30, 39],

'blue' : [34, 39],

'cyan' : [36, 39],

'green' : [32, 39],

'magenta' : [35, 39],

'red' : [31, 39],

'yellow' : [33, 39]

};

// Don't use 'blue' not visible on cmd.exe

inspect.styles = {

'special': 'cyan',

'number': 'yellow',

'boolean': 'yellow',

'undefined': 'grey',

'null': 'bold',

'string': 'green',

'symbol': 'green',

'date': 'magenta',

// "name": intentionally not styling

'regexp': 'red'

};

function stylizeWithColor(str, styleType) {

var style = inspect.styles[styleType];

if (style) {

return '\u001b[' + inspect.colors[style][0] + 'm' + str +

'\u001b[' + inspect.colors[style][1] + 'm';

} else {

return str;

}

}

function stylizeNoColor(str, styleType) {

return str;

}

function arrayToHash(array) {

var hash = {};

array.forEach(function(val, idx) {

hash[val] = true;

});

return hash;

}

function inspectPromise(p) {

var mirror = Debug.MakeMirror(p, true);

if (!mirror.isPromise())

return null;

return {status: mirror.status(), value: mirror.promiseValue().value_};

}

function formatValue(ctx, value, recurseTimes) {

// Provide a hook for user-specified inspect functions.

// Check that value is an object with an inspect function on it

if (ctx.customInspect &&

value &&

typeof value.inspect === 'function' &&

// Filter out the util module, it's inspect function is special

value.inspect !== exports.inspect &&

// Also filter out any prototype objects using the circular check.

!(value.constructor && value.constructor.prototype === value)) {

var ret = value.inspect(recurseTimes, ctx);

if (typeof ret !== 'string') {

ret = formatValue(ctx, ret, recurseTimes);

}

return ret;

}

// Primitive types cannot have properties

var primitive = formatPrimitive(ctx, value);

if (primitive) {

return primitive;

}

// Look up the keys of the object.

var keys = Object.keys(value);

var visibleKeys = arrayToHash(keys);

if (ctx.showHidden) {

keys = Object.getOwnPropertyNames(value);

keys = keys.concat(Object.getOwnPropertySymbols(value));

}

// This could be a boxed primitive (new String(), etc.), check valueOf()

// NOTE: Avoid calling `valueOf` on `Date` instance because it will return

// a number which, when object has some additional user-stored `keys`,

// will be printed out.

var formatted;

var raw = value;

try {

// the .valueOf() call can fail for a multitude of reasons

if (!isDate(value))

raw = value.valueOf();

} catch (e) {

// ignore...

}

if (typeof raw === 'string') {

// for boxed Strings, we have to remove the 0-n indexed entries,

// since they just noisey up the output and are redundant

keys = keys.filter(function(key) {

return !(key >= 0 && key < raw.length);

});

}

// Some type of object without properties can be shortcutted.

if (keys.length === 0) {

if (typeof value === 'function') {

var name = value.name ? ': ' + value.name : '';

return ctx.stylize('[Function' + name + ']', 'special');

}

if (isRegExp(value)) {

return ctx.stylize(RegExp.prototype.toString.call(value), 'regexp');

}

if (isDate(value)) {

return ctx.stylize(Date.prototype.toString.call(value), 'date');

}

if (isError(value)) {

return formatError(value);

}

// now check the `raw` value to handle boxed primitives

if (typeof raw === 'string') {

formatted = formatPrimitiveNoColor(ctx, raw);

return ctx.stylize('[String: ' + formatted + ']', 'string');

}

if (typeof raw === 'number') {

formatted = formatPrimitiveNoColor(ctx, raw);

return ctx.stylize('[Number: ' + formatted + ']', 'number');

}

if (typeof raw === 'boolean') {

formatted = formatPrimitiveNoColor(ctx, raw);

return ctx.stylize('[Boolean: ' + formatted + ']', 'boolean');

}

}

var base = '', empty = false, braces, formatter;

if (Array.isArray(value)) {

braces = ['[', ']'];

empty = value.length === 0;

formatter = formatArray;

} else if (value instanceof Set) {

braces = ['Set {', '}'];

// With `showHidden`, `length` will display as a hidden property for

// arrays. For consistency's sake, do the same for `size`, even though this

// property isn't selected by Object.getOwnPropertyNames().

if (ctx.showHidden)

keys.unshift('size');

empty = value.size === 0;

formatter = formatSet;

} else if (value instanceof Map) {

braces = ['Map {', '}'];

// Ditto.

if (ctx.showHidden)

keys.unshift('size');

empty = value.size === 0;

formatter = formatMap;

} else {

// Only create a mirror if the object superficially looks like a Promise.

var promiseInternals = value instanceof Promise && inspectPromise(value);

if (promiseInternals) {

braces = ['Promise {', '}'];

formatter = formatPromise;

} else {

braces = ['{', '}'];

empty = true; // No other data than keys.

formatter = formatObject;

}

}

empty = empty === true && keys.length === 0;

// Make functions say that they are functions

if (typeof value === 'function') {

var n = value.name ? ': ' + value.name : '';

base = ' [Function' + n + ']';

}

// Make RegExps say that they are RegExps

if (isRegExp(value)) {

base = ' ' + RegExp.prototype.toString.call(value);

}

// Make dates with properties first say the date

if (isDate(value)) {

base = ' ' + Date.prototype.toUTCString.call(value);

}

// Make error with message first say the error

if (isError(value)) {

base = ' ' + formatError(value);

}

// Make boxed primitive Strings look like such

if (typeof raw === 'string') {

formatted = formatPrimitiveNoColor(ctx, raw);

base = ' ' + '[String: ' + formatted + ']';

}

// Make boxed primitive Numbers look like such

if (typeof raw === 'number') {

formatted = formatPrimitiveNoColor(ctx, raw);

base = ' ' + '[Number: ' + formatted + ']';

}

// Make boxed primitive Booleans look like such

if (typeof raw === 'boolean') {

formatted = formatPrimitiveNoColor(ctx, raw);

base = ' ' + '[Boolean: ' + formatted + ']';

}

if (empty === true) {

return braces[0] + base + braces[1];

}

if (recurseTimes < 0) {

if (isRegExp(value)) {

return ctx.stylize(RegExp.prototype.toString.call(value), 'regexp');

} else {

return ctx.stylize('[Object]', 'special');

}

}

ctx.seen.push(value);

var output = formatter(ctx, value, recurseTimes, visibleKeys, keys);

ctx.seen.pop();

return reduceToSingleString(output, base, braces);

}

function formatPrimitive(ctx, value) {

if (value === undefined)

return ctx.stylize('undefined', 'undefined');

// For some reason typeof null is "object", so special case here.

if (value === null)

return ctx.stylize('null', 'null');

var type = typeof value;

if (type === 'string') {

var simple = '\'' + JSON.stringify(value).replace(/^"|"$/g, '')

.replace(/'/g, "\\'")

.replace(/\\"/g, '"') + '\'';

return ctx.stylize(simple, 'string');

}

if (type === 'number') {

// Format -0 as '-0'. Strict equality won't distinguish 0 from -0,

// so instead we use the fact that 1 / -0 < 0 whereas 1 / 0 > 0 .

if (value === 0 && 1 / value < 0)

return ctx.stylize('-0', 'number');

return ctx.stylize('' + value, 'number');

}

if (type === 'boolean')

return ctx.stylize('' + value, 'boolean');

// es6 symbol primitive

if (type === 'symbol')

return ctx.stylize(value.toString(), 'symbol');

}

function formatPrimitiveNoColor(ctx, value) {

var stylize = ctx.stylize;

ctx.stylize = stylizeNoColor;

var str = formatPrimitive(ctx, value);

ctx.stylize = stylize;

return str;

}

function formatError(value) {

return '[' + Error.prototype.toString.call(value) + ']';

}

function formatObject(ctx, value, recurseTimes, visibleKeys, keys) {

return keys.map(function(key) {

return formatProperty(ctx, value, recurseTimes, visibleKeys, key, false);

});

}

function formatArray(ctx, value, recurseTimes, visibleKeys, keys) {

var output = [];

for (var i = 0, l = value.length; i < l; ++i) {

if (hasOwnProperty(value, String(i))) {

output.push(formatProperty(ctx, value, recurseTimes, visibleKeys,

String(i), true));

} else {

output.push('');

}

}

keys.forEach(function(key) {

if (typeof key === 'symbol' || !key.match(/^\d+$/)) {

output.push(formatProperty(ctx, value, recurseTimes, visibleKeys,

key, true));

}

});

return output;

}

function formatSet(ctx, value, recurseTimes, visibleKeys, keys) {

var output = [];

value.forEach(function(v) {

var nextRecurseTimes = recurseTimes === null ? null : recurseTimes - 1;

var str = formatValue(ctx, v, nextRecurseTimes);

output.push(str);

});

keys.forEach(function(key) {

output.push(formatProperty(ctx, value, recurseTimes, visibleKeys,

key, false));

});

return output;

}

function formatMap(ctx, value, recurseTimes, visibleKeys, keys) {

var output = [];

value.forEach(function(v, k) {

var nextRecurseTimes = recurseTimes === null ? null : recurseTimes - 1;

var str = formatValue(ctx, k, nextRecurseTimes);

str += ' => ';

str += formatValue(ctx, v, nextRecurseTimes);

output.push(str);

});

keys.forEach(function(key) {

output.push(formatProperty(ctx, value, recurseTimes, visibleKeys,

key, false));

});

return output;

}

function formatPromise(ctx, value, recurseTimes, visibleKeys, keys) {

var output = [];

var internals = inspectPromise(value);

if (internals.status === 'pending') {

output.push('<pending>');

} else {

var nextRecurseTimes = recurseTimes === null ? null : recurseTimes - 1;

var str = formatValue(ctx, internals.value, nextRecurseTimes);

if (internals.status === 'rejected') {

output.push('<rejected> ' + str);

} else {

output.push(str);

}

}

keys.forEach(function(key) {

output.push(formatProperty(ctx, value, recurseTimes, visibleKeys,

key, false));

});

return output;

}

function formatProperty(ctx, value, recurseTimes, visibleKeys, key, array) {

var name, str, desc;

desc = Object.getOwnPropertyDescriptor(value, key) || { value: value[key] };

if (desc.get) {

if (desc.set) {

str = ctx.stylize('[Getter/Setter]', 'special');

} else {

str = ctx.stylize('[Getter]', 'special');

}

} else {

if (desc.set) {

str = ctx.stylize('[Setter]', 'special');

}

}

if (!hasOwnProperty(visibleKeys, key)) {

if (typeof key === 'symbol') {

name = '[' + ctx.stylize(key.toString(), 'symbol') + ']';

} else {

name = '[' + key + ']';

}

}

if (!str) {

if (ctx.seen.indexOf(desc.value) < 0) {

if (recurseTimes === null) {

str = formatValue(ctx, desc.value, null);

} else {

str = formatValue(ctx, desc.value, recurseTimes - 1);

}

if (str.indexOf('\n') > -1) {

if (array) {

str = str.split('\n').map(function(line) {

return ' ' + line;

}).join('\n').substr(2);

} else {

str = '\n' + str.split('\n').map(function(line) {

return ' ' + line;

}).join('\n');

}

}

} else {

str = ctx.stylize('[Circular]', 'special');

}

}

if (name === undefined) {

if (array && key.match(/^\d+$/)) {

return str;

}

name = JSON.stringify('' + key);

if (name.match(/^"([a-zA-Z_][a-zA-Z_0-9]*)"$/)) {

name = name.substr(1, name.length - 2);

name = ctx.stylize(name, 'name');

} else {

name = name.replace(/'/g, "\\'")

.replace(/\\"/g, '"')

.replace(/(^"|"$)/g, "'")

.replace(/\\\\/g, '\\');

name = ctx.stylize(name, 'string');

}

}

return name + ': ' + str;

}

function reduceToSingleString(output, base, braces) {

var length = output.reduce(function(prev, cur) {

return prev + cur.replace(/\u001b\[\d\d?m/g, '').length + 1;

}, 0);

if (length > 60) {

return braces[0] +

// If the opening "brace" is too large, like in the case of "Set {",

// we need to force the first item to be on the next line or the

// items will not line up correctly.

(base === '' && braces[0].length === 1 ? '' : base + '\n ') +

' ' +

output.join(',\n ') +

' ' +

braces[1];

}

return braces[0] + base + ' ' + output.join(', ') + ' ' + braces[1];

}

// NOTE: These type checking functions intentionally don't use `instanceof`

// because it is fragile and can be easily faked with `Object.create()`.

exports.isArray = Array.isArray;

function isBoolean(arg) {

return typeof arg === 'boolean';

}

exports.isBoolean = isBoolean;

function isNull(arg) {

return arg === null;

}

exports.isNull = isNull;

function isNullOrUndefined(arg) {

return arg === null || arg === undefined;

}

exports.isNullOrUndefined = isNullOrUndefined;

function isNumber(arg) {

return typeof arg === 'number';

}

exports.isNumber = isNumber;

function isString(arg) {

return typeof arg === 'string';

}

exports.isString = isString;

function isSymbol(arg) {

return typeof arg === 'symbol';

}

exports.isSymbol = isSymbol;

function isUndefined(arg) {

return arg === undefined;

}

exports.isUndefined = isUndefined;

function isRegExp(re) {

return re !== null && typeof re === 'object' &&

objectToString(re) === '[object RegExp]';

}

exports.isRegExp = isRegExp;

function isObject(arg) {

return arg !== null && typeof arg === 'object';

}

exports.isObject = isObject;

function isDate(d) {

return d !== null && typeof d === 'object' &&

objectToString(d) === '[object Date]';

}

exports.isDate = isDate;

function isError(e) {

return e !== null && typeof e === 'object' &&

(objectToString(e) === '[object Error]' || e instanceof Error);

}

exports.isError = isError;

function isFunction(arg) {

return typeof arg === 'function';

}

exports.isFunction = isFunction;

function isPrimitive(arg) {

return arg === null ||

typeof arg !== 'object' && typeof arg !== 'function';

}

exports.isPrimitive = isPrimitive;

function isBuffer(arg) {

return arg instanceof Buffer;

}

exports.isBuffer = isBuffer;

function objectToString(o) {

return Object.prototype.toString.call(o);

}

function pad(n) {

return n < 10 ? '0' + n.toString(10) : n.toString(10);

}

const months = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep',

'Oct', 'Nov', 'Dec'];

// 26 Feb 16:19:34

function timestamp() {

var d = new Date();

var time = [pad(d.getHours()),

pad(d.getMinutes()),

pad(d.getSeconds())].join(':');

return [d.getDate(), months[d.getMonth()], time].join(' ');

}

// log is just a thin wrapper to console.log that prepends a timestamp

exports.log = function() {

console.log('%s - %s', timestamp(), exports.format.apply(exports, arguments));

};

/**

* Inherit the prototype methods from one constructor into another.

*

* The Function.prototype.inherits from lang.js rewritten as a standalone

* function (not on Function.prototype). NOTE: If this file is to be loaded

* during bootstrapping this function needs to be rewritten using some native

* functions as prototype setup using normal JavaScript does not work as

* expected during bootstrapping (see mirror.js in r114903).

*

* @param {function} ctor Constructor function which needs to inherit the

* prototype.

* @param {function} superCtor Constructor function to inherit prototype from.

* @throws {TypeError} Will error if either constructor is null, or if

* the super constructor lacks a prototype.

*/

exports.inherits = function(ctor, superCtor) {

if (ctor === undefined || ctor === null)

throw new TypeError('The constructor to `inherits` must not be ' +

'null or undefined.');

if (superCtor === undefined || superCtor === null)

throw new TypeError('The super constructor to `inherits` must not ' +

'be null or undefined.');

if (superCtor.prototype === undefined)

throw new TypeError('The super constructor to `inherits` must ' +

'have a prototype.');

ctor.super_ = superCtor;

ctor.prototype = Object.create(superCtor.prototype, {

constructor: {

value: ctor,

enumerable: false,

writable: true,

configurable: true

}

});

};

exports._extend = function(origin, add) {

// Don't do anything if add isn't an object

if (add === null || typeof add !== 'object') return origin;

var keys = Object.keys(add);

var i = keys.length;

while (i--) {

origin[keys[i]] = add[keys[i]];

}

return origin;

};

function hasOwnProperty(obj, prop) {

return Object.prototype.hasOwnProperty.call(obj, prop);

}

// Deprecated old stuff.

exports.p = exports.deprecate(function() {

for (var i = 0, len = arguments.length; i < len; ++i) {

console.error(exports.inspect(arguments[i]));

}

}, 'util.p: Use console.error() instead');

exports.exec = exports.deprecate(function() {

return require('child_process').exec.apply(this, arguments);

}, 'util.exec is now called `child_process.exec`.');

exports.print = exports.deprecate(function() {

for (var i = 0, len = arguments.length; i < len; ++i) {

process.stdout.write(String(arguments[i]));

}

}, 'util.print: Use console.log instead');

exports.puts = exports.deprecate(function() {

for (var i = 0, len = arguments.length; i < len; ++i) {

process.stdout.write(arguments[i] + '\n');

}

}, 'util.puts: Use console.log instead');

exports.debug = exports.deprecate(function(x) {

process.stderr.write('DEBUG: ' + x + '\n');

}, 'util.debug: Use console.error instead');

exports.error = exports.deprecate(function(x) {

for (var i = 0, len = arguments.length; i < len; ++i) {

process.stderr.write(arguments[i] + '\n');

}

}, 'util.error: Use console.error instead');

exports.pump = exports.deprecate(function(readStream, writeStream, callback) {

var callbackCalled = false;

function call(a, b, c) {

if (callback && !callbackCalled) {

callback(a, b, c);

callbackCalled = true;

}

}

readStream.addListener('data', function(chunk) {

if (writeStream.write(chunk) === false) readStream.pause();

});

writeStream.addListener('drain', function() {

readStream.resume();

});

readStream.addListener('end', function() {

writeStream.end();

});

readStream.addListener('close', function() {

call();

});

readStream.addListener('error', function(err) {

writeStream.end();

call(err);

});

writeStream.addListener('error', function(err) {

readStream.destroy();

call(err);

});

}, 'util.pump(): Use readableStream.pipe() instead');

exports._errnoException = function(err, syscall, original) {

var errname = uv.errname(err);

var message = syscall + ' ' + errname;

if (original)

message += ' ' + original;

var e = new Error(message);

e.code = errname;

e.errno = errname;

e.syscall = syscall;

return e;

};

exports._exceptionWithHostPort = function(err,

syscall,

address,

port,

additional) {

var details;

if (port && port > 0) {

details = address + ':' + port;

} else {

details = address;

}

if (additional) {

details += ' - Local (' + additional + ')';

}

var ex = exports._errnoException(err, syscall, details);

ex.address = address;

if (port) {

ex.port = port;

}

return ex;

};