node/lib/util.js at debugProcess · wave2future/node · GitHub

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// Copyright Joyent, Inc. and other Node contributors.

// Permission is hereby granted, free of charge, to any person obtaining a

// copy of this software and associated documentation files (the

// "Software"), to deal in the Software without restriction, including

// without limitation the rights to use, copy, modify, merge, publish,

// distribute, sublicense, and/or sell copies of the Software, and to permit

// persons to whom the Software is furnished to do so, subject to the

// following conditions:

// The above copyright notice and this permission notice shall be included

// in all copies or substantial portions of the Software.

// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS

// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN

// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,

// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR

// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE

// USE OR OTHER DEALINGS IN THE SOFTWARE.

var events = require('events');

var 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(' ');

}

var i = 1;

var args = arguments;

var len = args.length;

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

if (i >= len) return x;

switch (x) {

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

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

case '%j': return JSON.stringify(args[i++]);

case '%%': return '%';

default:

return x;

}

});

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

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

str += ' ' + x;

} else {

str += ' ' + inspect(x);

}

return str;

};

exports.print = function() {

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

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

}

};

exports.puts = function() {

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

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

}

};

exports.debug = function(x) {

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

};

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

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

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

}

};

/**

* 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 {Boolean} showHidden Flag that shows hidden (not enumerable)

* properties of objects.

* @param {Number} depth Depth in which to descend in object. Default is 2.

* @param {Boolean} colors Flag to turn on ANSI escape codes to color the

* output. Default is false (no coloring).

function inspect(obj, showHidden, depth, colors) {

var ctx = {

showHidden: showHidden,

seen: [],

stylize: colors ? stylizeWithColor : stylizeNoColor

};

return formatValue(ctx, obj, (typeof depth === 'undefined' ? 2 : depth));

}

exports.inspect = inspect;

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

var 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]

};

var styles = {

'special': 'cyan',

'number': 'blue',

'boolean': 'yellow',

'undefined': 'grey',

'null': 'bold',

'string': 'green',

'date': 'magenta',

// "name": intentionally not styling

'regexp': 'red'

};

function stylizeWithColor(str, styleType) {

var style = styles[styleType];

if (style) {

return '\033[' + colors[style][0] + 'm' + str +

'\033[' + colors[style][1] + 'm';

} else {

return str;

}

function stylizeNoColor(str, styleType) {

return str;

}

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

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

value !== exports &&

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

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

return value.inspect(recurseTimes);

}

// Primitive types cannot have properties

var primitive = formatPrimitive(ctx, value);

if (primitive) {

return primitive;

}

// Look up the keys of the object.

var visibleKeys = Object.keys(value);

var keys = ctx.showHidden ? Object.getOwnPropertyNames(value) : visibleKeys;

// 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.toUTCString.call(value), 'date');

}

if (isError(value)) {

return formatError(value);

}

var base = '', array = false, braces = ['{', '}'];

// Make Array say that they are Array

if (isArray(value)) {

array = true;

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

}

// 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);

}

if (keys.length === 0 && (!array || value.length == 0)) {

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;

if (array) {

output = formatArray(ctx, value, recurseTimes, visibleKeys, keys);

} else {

output = keys.map(function(key) {

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

});

}

ctx.seen.pop();

return reduceToSingleString(output, base, braces);

}

function formatPrimitive(ctx, value) {

switch (typeof value) {

case 'undefined':

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

case 'string':

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

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

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

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

case 'number':

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

case 'boolean':

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

}

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

if (value === null) {

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

}

function formatError(value) {

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

}

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

var output = [];

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

if (Object.prototype.hasOwnProperty.call(value, String(i))) {

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

String(i), true));

} else {

output.push('');

}

keys.forEach(function(key) {

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

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

key, true));

}

});

return output;

}

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

var name, str;

if (value.__lookupGetter__) {

if (value.__lookupGetter__(key)) {

if (value.__lookupSetter__(key)) {

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

} else {

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

}

} else {

if (value.__lookupSetter__(key)) {

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

}

if (visibleKeys.indexOf(key) < 0) {

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

}

if (!str) {

if (ctx.seen.indexOf(value[key]) < 0) {

if (recurseTimes === null) {

str = formatValue(ctx, value[key], null);

} else {

str = formatValue(ctx, value[key], 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 (typeof 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, "'");

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

}

return name + ': ' + str;

}

function reduceToSingleString(output, base, braces) {

var numLinesEst = 0;

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

numLinesEst++;

if (cur.indexOf('\n') >= 0) numLinesEst++;

return prev + cur.length + 1;

}, 0);

if (length > 60) {

return braces[0] +

(base === '' ? '' : 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()`.

function isArray(ar) {

return Array.isArray(ar) ||

(typeof ar === 'object' && objectToString(ar) === '[object Array]');

}

exports.isArray = isArray;

function isRegExp(re) {

return typeof re === 'object' && objectToString(re) === '[object RegExp]';

}

exports.isRegExp = isRegExp;

function isDate(d) {

return typeof d === 'object' && objectToString(d) === '[object Date]';

}

exports.isDate = isDate;

function isError(e) {

return typeof e === 'object' && objectToString(e) === '[object Error]';

}

exports.isError = isError;

function objectToString(o) {

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

}

var pWarning;

exports.p = function() {

if (!pWarning) {

pWarning = 'util.p will be removed in future versions of Node. ' +

'Use util.puts(util.inspect()) instead.\n';

exports.error(pWarning);

}

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

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

}

};

function pad(n) {

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

}

var 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(' ');

}

exports.log = function(msg) {

exports.puts(timestamp() + ' - ' + msg.toString());

};

var execWarning;

exports.exec = function() {

if (!execWarning) {

execWarning = 'util.exec has moved to the "child_process" module.' +

' Please update your source code.';

error(execWarning);

}

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

};

exports.pump = 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);

});

};

/**

* 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 revritten 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.

exports.inherits = function(ctor, superCtor) {

ctor.super_ = superCtor;

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

constructor: {

value: ctor,

enumerable: false,

writable: true,

configurable: true

}

});

};

node/lib/util.js at debugProcess · wave2future/node · GitHub

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