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1065 lines (913 loc) · 30.5 KB
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'use strict';
const uv = process.binding('uv');
const Buffer = require('buffer').Buffer;
const internalUtil = require('internal/util');
const binding = process.binding('util');
const isError = internalUtil.isError;
const inspectDefaultOptions = Object.seal({
showHidden: false,
depth: 2,
colors: false,
customInspect: true,
showProxy: false,
maxArrayLength: 100,
breakLength: 60
});
var Debug;
var simdFormatters;
// SIMD is only available when --harmony_simd is specified on the command line
// and the set of available types differs between v5 and v6, that's why we use
// a map to look up and store the formatters. It also provides a modicum of
// protection against users monkey-patching the SIMD object.
if (typeof global.SIMD === 'object' && global.SIMD !== null) {
simdFormatters = new Map();
const make = (extractLane, count) => {
return (ctx, value, recurseTimes, visibleKeys, keys) => {
const output = new Array(count);
for (let i = 0; i < count; i += 1)
output[i] = formatPrimitive(ctx, extractLane(value, i));
return output;
};
};
const SIMD = global.SIMD; // Pacify eslint.
if (typeof SIMD.Bool16x8 === 'function')
simdFormatters.set(SIMD.Bool16x8, make(SIMD.Bool16x8.extractLane, 8));
if (typeof SIMD.Bool32x4 === 'function')
simdFormatters.set(SIMD.Bool32x4, make(SIMD.Bool32x4.extractLane, 4));
if (typeof SIMD.Bool8x16 === 'function')
simdFormatters.set(SIMD.Bool8x16, make(SIMD.Bool8x16.extractLane, 16));
if (typeof SIMD.Float32x4 === 'function')
simdFormatters.set(SIMD.Float32x4, make(SIMD.Float32x4.extractLane, 4));
if (typeof SIMD.Int16x8 === 'function')
simdFormatters.set(SIMD.Int16x8, make(SIMD.Int16x8.extractLane, 8));
if (typeof SIMD.Int32x4 === 'function')
simdFormatters.set(SIMD.Int32x4, make(SIMD.Int32x4.extractLane, 4));
if (typeof SIMD.Int8x16 === 'function')
simdFormatters.set(SIMD.Int8x16, make(SIMD.Int8x16.extractLane, 16));
if (typeof SIMD.Uint16x8 === 'function')
simdFormatters.set(SIMD.Uint16x8, make(SIMD.Uint16x8.extractLane, 8));
if (typeof SIMD.Uint32x4 === 'function')
simdFormatters.set(SIMD.Uint32x4, make(SIMD.Uint32x4.extractLane, 4));
if (typeof SIMD.Uint8x16 === 'function')
simdFormatters.set(SIMD.Uint8x16, make(SIMD.Uint8x16.extractLane, 16));
}
function tryStringify(arg) {
try {
return JSON.stringify(arg);
} catch (_) {
return '[Circular]';
}
}
exports.format = function(f) {
if (typeof f !== 'string') {
const objects = new Array(arguments.length);
for (var index = 0; index < arguments.length; index++) {
objects[index] = inspect(arguments[index]);
}
return objects.join(' ');
}
var argLen = arguments.length;
if (argLen === 1) return f;
var str = '';
var a = 1;
var lastPos = 0;
for (var i = 0; i < f.length;) {
if (f.charCodeAt(i) === 37/*'%'*/ && i + 1 < f.length) {
switch (f.charCodeAt(i + 1)) {
case 100: // 'd'
if (a >= argLen)
break;
if (lastPos < i)
str += f.slice(lastPos, i);
str += Number(arguments[a++]);
lastPos = i = i + 2;
continue;
case 106: // 'j'
if (a >= argLen)
break;
if (lastPos < i)
str += f.slice(lastPos, i);
str += tryStringify(arguments[a++]);
lastPos = i = i + 2;
continue;
case 115: // 's'
if (a >= argLen)
break;
if (lastPos < i)
str += f.slice(lastPos, i);
str += String(arguments[a++]);
lastPos = i = i + 2;
continue;
case 37: // '%'
if (lastPos < i)
str += f.slice(lastPos, i);
str += '%';
lastPos = i = i + 2;
continue;
}
}
++i;
}
if (lastPos === 0)
str = f;
else if (lastPos < f.length)
str += f.slice(lastPos);
while (a < argLen) {
const x = arguments[a++];
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. Tries 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[2] !== undefined) ctx.depth = arguments[2];
if (arguments[3] !== undefined) ctx.colors = arguments[3];
if (typeof opts === 'boolean') {
// legacy...
ctx.showHidden = opts;
}
// Set default and user-specified options
ctx = Object.assign({}, inspect.defaultOptions, ctx, opts);
if (ctx.colors) ctx.stylize = stylizeWithColor;
if (ctx.maxArrayLength === null) ctx.maxArrayLength = Infinity;
return formatValue(ctx, obj, ctx.depth);
}
Object.defineProperty(inspect, 'defaultOptions', {
get: function() {
return inspectDefaultOptions;
},
set: function(options) {
if (options === null || typeof options !== 'object') {
throw new TypeError('"options" must be an object');
}
Object.assign(inspectDefaultOptions, options);
return inspectDefaultOptions;
}
});
// 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'
};
const customInspectSymbol = internalUtil.customInspectSymbol;
exports.inspect = inspect;
exports.inspect.custom = customInspectSymbol;
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 = Object.create(null);
for (var i = 0; i < array.length; i++) {
var val = array[i];
hash[val] = true;
}
return hash;
}
function getConstructorOf(obj) {
while (obj) {
var descriptor = Object.getOwnPropertyDescriptor(obj, 'constructor');
if (descriptor !== undefined &&
typeof descriptor.value === 'function' &&
descriptor.value.name !== '') {
return descriptor.value;
}
obj = Object.getPrototypeOf(obj);
}
return null;
}
function ensureDebugIsInitialized() {
if (Debug === undefined) {
const runInDebugContext = require('vm').runInDebugContext;
Debug = runInDebugContext('Debug');
}
}
function inspectPromise(p) {
ensureDebugIsInitialized();
// Only create a mirror if the object is a Promise.
if (!binding.isPromise(p))
return null;
const mirror = Debug.MakeMirror(p, true);
return {status: mirror.status(), value: mirror.promiseValue().value_};
}
function formatValue(ctx, value, recurseTimes) {
if (ctx.showProxy &&
((typeof value === 'object' && value !== null) ||
typeof value === 'function')) {
var proxy = undefined;
var proxyCache = ctx.proxyCache;
if (!proxyCache)
proxyCache = ctx.proxyCache = new Map();
// Determine if we've already seen this object and have
// determined that it either is or is not a proxy.
if (proxyCache.has(value)) {
// We've seen it, if the value is not undefined, it's a Proxy.
proxy = proxyCache.get(value);
} else {
// Haven't seen it. Need to check.
// If it's not a Proxy, this will return undefined.
// Otherwise, it'll return an array. The first item
// is the target, the second item is the handler.
// We ignore (and do not return) the Proxy isRevoked property.
proxy = binding.getProxyDetails(value);
if (proxy) {
// We know for a fact that this isn't a Proxy.
// Mark it as having already been evaluated.
// We do this because this object is passed
// recursively to formatValue below in order
// for it to get proper formatting, and because
// the target and handle objects also might be
// proxies... it's unfortunate but necessary.
proxyCache.set(proxy, undefined);
}
// If the object is not a Proxy, then this stores undefined.
// This tells the code above that we've already checked and
// ruled it out. If the object is a proxy, this caches the
// results of the getProxyDetails call.
proxyCache.set(value, proxy);
}
if (proxy) {
return 'Proxy ' + formatValue(ctx, proxy, 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) {
const maybeCustomInspect = value[customInspectSymbol] || value.inspect;
if (typeof maybeCustomInspect === 'function' &&
// Filter out the util module, its inspect function is special
maybeCustomInspect !== exports.inspect &&
// Also filter out any prototype objects using the circular check.
!(value.constructor && value.constructor.prototype === value)) {
let ret = maybeCustomInspect.call(value, recurseTimes, ctx);
// If the custom inspection method returned `this`, don't go into
// infinite recursion.
if (ret !== value) {
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 noisy 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)) {
if (Number.isNaN(value.getTime())) {
return ctx.stylize(value.toString(), 'date');
} else {
return ctx.stylize(Date.prototype.toISOString.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 === 'symbol') {
formatted = formatPrimitiveNoColor(ctx, raw);
return ctx.stylize('[Symbol: ' + formatted + ']', 'symbol');
}
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');
}
// Fast path for ArrayBuffer. Can't do the same for DataView because it
// has a non-primitive .buffer property that we need to recurse for.
if (binding.isArrayBuffer(value)) {
return `${getConstructorOf(value).name}` +
` { byteLength: ${formatNumber(ctx, value.byteLength)} }`;
}
}
var constructor = getConstructorOf(value);
var base = '', empty = false, braces;
var formatter = formatObject;
// We can't compare constructors for various objects using a comparison like
// `constructor === Array` because the object could have come from a different
// context and thus the constructor won't match. Instead we check the
// constructor names (including those up the prototype chain where needed) to
// determine object types.
if (Array.isArray(value)) {
// Unset the constructor to prevent "Array [...]" for ordinary arrays.
if (constructor && constructor.name === 'Array')
constructor = null;
braces = ['[', ']'];
empty = value.length === 0;
formatter = formatArray;
} else if (binding.isSet(value)) {
braces = ['{', '}'];
// 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 (binding.isMap(value)) {
braces = ['{', '}'];
// Ditto.
if (ctx.showHidden)
keys.unshift('size');
empty = value.size === 0;
formatter = formatMap;
} else if (binding.isArrayBuffer(value)) {
braces = ['{', '}'];
keys.unshift('byteLength');
visibleKeys.byteLength = true;
} else if (binding.isDataView(value)) {
braces = ['{', '}'];
// .buffer goes last, it's not a primitive like the others.
keys.unshift('byteLength', 'byteOffset', 'buffer');
visibleKeys.byteLength = true;
visibleKeys.byteOffset = true;
visibleKeys.buffer = true;
} else if (binding.isTypedArray(value)) {
braces = ['[', ']'];
formatter = formatTypedArray;
if (ctx.showHidden) {
// .buffer goes last, it's not a primitive like the others.
keys.unshift('BYTES_PER_ELEMENT',
'length',
'byteLength',
'byteOffset',
'buffer');
}
} else {
var promiseInternals = inspectPromise(value);
if (promiseInternals) {
braces = ['{', '}'];
formatter = formatPromise;
} else {
let maybeSimdFormatter;
if (binding.isMapIterator(value)) {
constructor = { name: 'MapIterator' };
braces = ['{', '}'];
empty = false;
formatter = formatCollectionIterator;
} else if (binding.isSetIterator(value)) {
constructor = { name: 'SetIterator' };
braces = ['{', '}'];
empty = false;
formatter = formatCollectionIterator;
} else if (simdFormatters &&
typeof constructor === 'function' &&
(maybeSimdFormatter = simdFormatters.get(constructor))) {
braces = ['[', ']'];
formatter = maybeSimdFormatter;
} else {
// Unset the constructor to prevent "Object {...}" for ordinary objects.
if (constructor && constructor.name === 'Object')
constructor = null;
braces = ['{', '}'];
empty = true; // No other data than keys.
}
}
}
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.toISOString.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 + ']';
}
// Add constructor name if available
if (base === '' && constructor)
braces[0] = constructor.name + ' ' + braces[0];
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, ctx.breakLength);
}
function formatNumber(ctx, value) {
// 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');
}
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')
return formatNumber(ctx, value);
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 value.stack || '[' + 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 = [];
const maxLength = Math.min(Math.max(0, ctx.maxArrayLength), value.length);
const remaining = value.length - maxLength;
for (var i = 0; i < maxLength; ++i) {
if (hasOwnProperty(value, String(i))) {
output.push(formatProperty(ctx, value, recurseTimes, visibleKeys,
String(i), true));
} else {
output.push('');
}
}
if (remaining > 0) {
output.push(`... ${remaining} more item${remaining > 1 ? 's' : ''}`);
}
keys.forEach(function(key) {
if (typeof key === 'symbol' || !key.match(/^\d+$/)) {
output.push(formatProperty(ctx, value, recurseTimes, visibleKeys,
key, true));
}
});
return output;
}
function formatTypedArray(ctx, value, recurseTimes, visibleKeys, keys) {
const maxLength = Math.min(Math.max(0, ctx.maxArrayLength), value.length);
const remaining = value.length - maxLength;
var output = new Array(maxLength);
for (var i = 0; i < maxLength; ++i)
output[i] = formatNumber(ctx, value[i]);
if (remaining > 0) {
output.push(`... ${remaining} more item${remaining > 1 ? 's' : ''}`);
}
for (const key of keys) {
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 formatCollectionIterator(ctx, value, recurseTimes, visibleKeys, keys) {
ensureDebugIsInitialized();
const mirror = Debug.MakeMirror(value, true);
var nextRecurseTimes = recurseTimes === null ? null : recurseTimes - 1;
var vals = mirror.preview();
var output = [];
for (const o of vals) {
output.push(formatValue(ctx, o, nextRecurseTimes));
}
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.replace(/\n/g, '\n ');
} else {
str = str.replace(/(^|\n)/g, '\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, breakLength) {
var length = output.reduce(function(prev, cur) {
return prev + cur.replace(/\u001b\[\d\d?m/g, '').length + 1;
}, 0);
if (length > breakLength) {
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 binding.isRegExp(re);
}
exports.isRegExp = isRegExp;
function isObject(arg) {
return arg !== null && typeof arg === 'object';
}
exports.isObject = isObject;
function isDate(d) {
return binding.isDate(d);
}
exports.isDate = isDate;
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;
exports.isBuffer = Buffer.isBuffer;
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;
Object.setPrototypeOf(ctor.prototype, superCtor.prototype);
};
exports._extend = function(target, source) {
// Don't do anything if source isn't an object
if (source === null || typeof source !== 'object') return target;
var keys = Object.keys(source);
var i = keys.length;
while (i--) {
target[keys[i]] = source[keys[i]];
}
return target;
};
function hasOwnProperty(obj, prop) {
return Object.prototype.hasOwnProperty.call(obj, prop);
}