On Linux, move the passing of filedescriptors to a dedicated socketpair().

chrome/tools/test/reference_build/chrome_linux/resources/inspector/json.js

-// Copyright 2006 Google Inc.
-// All Rights Reserved.
-// 
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions
-// are met:
-// 
-//  * Redistributions of source code must retain the above copyright
-//    notice, this list of conditions and the following disclaimer.
-//  * Redistributions in binary form must reproduce the above copyright
-//    notice, this list of conditions and the following disclaimer in
-//    the documentation and/or other materials provided with the
-//    distribution.
-// 
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
-// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
-// COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
-// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
-// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
-// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
-// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
-// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-// POSSIBILITY OF SUCH DAMAGE. 
-
-// NOTE: This file has been changed from the one on doctype. The following
-// changes were made:
-// - Modified unsafeParse() to use new Function() instead of eval() because eval
-//   is not allowed inside v8 extensions.
-// - Modified parse() to delegate to unsafeParse() instead of calling eval()
-//   directly.
-
-/**
- * @fileoverview JSON utility functions
- */
-
-
-
-goog.provide('goog.json');
-goog.provide('goog.json.Serializer');
-
-
-/**
- * Tests if a string is an invalid JSON string. This only ensures that we are
- * not using any invalid characters
- * @param {string} s The string to test.
- * @return {boolean} True if the input is a valid JSON string.
- * @private
- */
-goog.json.isValid_ = function(s) {
-  // All empty whitespace is not valid.
-  if (/^\s*$/.test(s)) {
-    return false;
-  }
-
-  // This is taken from http://www.json.org/json2.js which is released to the
-  // public domain.
-  // Changes: We dissallow \u2028 Line separator and \u2029 Paragraph separator
-  // inside strings.  We also treat \u2028 and \u2029 as whitespace which they
-  // are in the RFC but IE and Safari does not match \s to these so we need to
-  // include them in the reg exps in all places where whitespace is allowed.
-
-  // Parsing happens in three stages. In the first stage, we run the text
-  // against regular expressions that look for non-JSON patterns. We are
-  // especially concerned with '()' and 'new' because they can cause invocation,
-  // and '=' because it can cause mutation. But just to be safe, we want to
-  // reject all unexpected forms.
-
-  // We split the first stage into 4 regexp operations in order to work around
-  // crippling inefficiencies in IE's and Safari's regexp engines. First we
-  // replace all backslash pairs with '@' (a non-JSON character). Second, we
-  // replace all simple value tokens with ']' characters. Third, we delete all
-  // open brackets that follow a colon or comma or that begin the text. Finally,
-  // we look to see that the remaining characters are only whitespace or ']' or
-  // ',' or ':' or '{' or '}'. If that is so, then the text is safe for eval.
-
-  // Don't make these static since they have the global flag.
-  var backslashesRe = /\\["\\\/bfnrtu]/g;
-  var simpleValuesRe =
-      /"[^"\\\n\r\u2028\u2029\x00-\x1f\x7f-\x9f]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g;
-  var openBracketsRe = /(?:^|:|,)(?:[\s\u2028\u2029]*\[)+/g;
-  var remainderRe = /^[\],:{}\s\u2028\u2029]*$/;
-
-  return remainderRe.test(s.replace(backslashesRe, '@').
-      replace(simpleValuesRe, ']').
-      replace(openBracketsRe, ''));
-};
-
-
-/**
- * Parses a JSON string and returns the result. This throws an exception if
- * the string is an invalid JSON string.
- *
- * If the user agent has built in support for parsing JSON (using
- * <code>String.prototype.parseJSON</code>) that will be used.
- *
- * Note that this is very slow on large strings. If you trust the source of
- * the string then you should use unsafeParse instead.
- *
- * @param {string} s The JSON string to parse.
- * @return {Object} The object generated from the JSON string.
- */
-goog.json.parse = function(s) {
-  s = String(s);
-  if (typeof s.parseJSON == 'function') {
-    return s.parseJSON();
-  }
-  if (goog.json.isValid_(s)) {
-    /** @preserveTry */
-    try {
-      return goog.json.unsafeParse(s);
-    } catch (ex) {
-    }
-  }
-  throw Error('Invalid JSON string: ' + s);
-};
-
-
-/**
- * Parses a JSON string and returns the result. This uses eval so it is open
- * to security issues and it should only be used if you trust the source.
- *
- * @param {string} s The JSON string to parse.
- * @return {Object} The object generated from the JSON string.
- */
-goog.json.unsafeParse = function(s) {
-  // This is lame. V8 disallows direct access to eval() in extensions (see:
-  // v8::internal::Parser::ParseLeftHandSideExpression()). So we must use this
-  // nasty hack instead.
-  return new Function('return ('+ s + ')')();
-};
-
-
-/**
- * Instance of the serializer object.
- * @type {goog.json.Serializer}
- * @private
- */
-goog.json.serializer_ = null;
-
-
-/**
- * Serializes an object or a value to a JSON string.
- *
- * If the user agent has built in support for serializing JSON (using
- * <code>Object.prototype.toJSONString</code>) that will be used.
- *
- * @param {Object} object The object to serialize.
- * @throws Error if there are loops in the object graph.
- * @return {string} A JSON string representation of the input.
- */
-goog.json.serialize = function(object) {
-  if (!goog.json.serializer_) {
-    goog.json.serializer_ = new goog.json.Serializer;
-  }
-  return goog.json.serializer_.serialize(object);
-};
-
-
-
-/**
- * Class that is used to serialize JSON objects to a string.
- * @constructor
- */
-goog.json.Serializer = function() {
-};
-
-
-/**
- * Serializes an object or a value to a JSON string.
- *
- * If the user agent has built in support for serializing JSON (using
- * <code>Object.prototype.toJSONString</code>) that will be used.
- *
- * @param {Object?} object The object to serialize.
- * @throws Error if there are loops in the object graph.
- * @return {string} A JSON string representation of the input.
- */
-goog.json.Serializer.prototype.serialize = function(object) {
-  // null and undefined cannot have properties. (null == undefined)
-  if (object != null && typeof object.toJSONString == 'function') {
-    return object.toJSONString();
-  }
-  var sb = [];
-  this.serialize_(object, sb);
-  return sb.join('');
-};
-
-
-/**
- * Serializes a generic value to a JSON string
- * @private
- * @param {Object?} object The object to serialize.
- * @param {Array} sb Array used as a string builder.
- * @throws Error if there are loops in the object graph.
- */
-goog.json.Serializer.prototype.serialize_ = function(object, sb) {
-  switch (typeof object) {
-    case 'string':
-      this.serializeString_(object, sb);
-      break;
-    case 'number':
-      this.serializeNumber_(object, sb);
-      break;
-    case 'boolean':
-      sb.push(object);
-      break;
-    case 'undefined':
-      sb.push('null');
-      break;
-    case 'object':
-      if (object == null) {
-        sb.push('null');
-        break;
-      }
-      if (goog.isArray(object)) {
-        this.serializeArray_(object, sb);
-        break;
-      }
-      // should we allow new String, new Number and new Boolean to be treated
-      // as string, number and boolean? Most implementations do not and the
-      // need is not very big
-      this.serializeObject_(object, sb);
-      break;
-    default:
-      throw Error('Unknown type: ' + typeof object);
-  }
-};
-
-
-/**
- * Character mappings used internally for goog.string.quote
- * @private
- * @type {Object}
- */
-goog.json.Serializer.charToJsonCharCache_ = {
-  '\"': '\\"',
-  '\\': '\\\\',
-  '/': '\\/',
-  '\b': '\\b',
-  '\f': '\\f',
-  '\n': '\\n',
-  '\r': '\\r',
-  '\t': '\\t',
-
-  '\x0B': '\\u000b' // '\v' is not supported in JScript
-};
-
-
-/**
- * Serializes a string to a JSON string
- * @private
- * @param {string} s The string to serialize.
- * @param {Array} sb Array used as a string builder.
- */
-goog.json.Serializer.prototype.serializeString_ = function(s, sb) {
-  // The official JSON implementation does not work with international
-  // characters.
-  sb.push('"', s.replace(/[\\\"\x00-\x1f\x80-\uffff]/g, function(c) {
-    // caching the result improves performance by a factor 2-3
-    if (c in goog.json.Serializer.charToJsonCharCache_) {
-      return goog.json.Serializer.charToJsonCharCache_[c];
-    }
-
-    var cc = c.charCodeAt(0);
-    var rv = '\\u';
-    if (cc < 16) {
-      rv += '000';
-    } else if (cc < 256) {
-      rv += '00';
-    } else if (cc < 4096) { // \u1000
-      rv += '0';
-    }
-    return goog.json.Serializer.charToJsonCharCache_[c] = rv + cc.toString(16);
-  }), '"');
-};
-
-
-/**
- * Serializes a number to a JSON string
- * @private
- * @param {number} n The number to serialize.
- * @param {Array} sb Array used as a string builder.
- */
-goog.json.Serializer.prototype.serializeNumber_ = function(n, sb) {
-  sb.push(isFinite(n) && !isNaN(n) ? n : 'null');
-};
-
-
-/**
- * Serializes an array to a JSON string
- * @private
- * @param {Array} arr The array to serialize.
- * @param {Array} sb Array used as a string builder.
- */
-goog.json.Serializer.prototype.serializeArray_ = function(arr, sb) {
-  var l = arr.length;
-  sb.push('[');
-  var sep = '';
-  for (var i = 0; i < l; i++) {
-    sb.push(sep)
-    this.serialize_(arr[i], sb);
-    sep = ',';
-  }
-  sb.push(']');
-};
-
-
-/**
- * Serializes an object to a JSON string
- * @private
- * @param {Object} obj The object to serialize.
- * @param {Array} sb Array used as a string builder.
- */
-goog.json.Serializer.prototype.serializeObject_ = function(obj, sb) {
-  sb.push('{');
-  var sep = '';
-  for (var key in obj) {
-    sb.push(sep);
-    this.serializeString_(key, sb);
-    sb.push(':');
-    this.serialize_(obj[key], sb);
-    sep = ',';
-  }
-  sb.push('}');
-};