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Douglas Crockford 2015-05-03 06:03:46 -07:00
parent 40e6d9942c
commit 04768c45a7
1 changed files with 24 additions and 19 deletions
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43
json2.js
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@ -1,6 +1,6 @@
/*
json2.js
2015-05-02
2015-05-03
Public Domain.
@ -17,7 +17,9 @@
This file creates a global JSON object containing two methods: stringify
and parse.
and parse. This file is provides the ES5 JSON capability to ES3 systems.
If a project might run on IE8 or earlier, then this file should be included.
This file does nothing on ES5 systems.
JSON.stringify(value, replacer, space)
value any JavaScript value, usually an object or array.
@ -170,6 +172,13 @@ if (typeof JSON !== 'object') {
(function () {
'use strict';
var rx_one = /^[\],:{}\s]*$/,
rx_two = /\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g,
rx_three = /"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g,
rx_four = /(?:^|:|,)(?:\s*\[)+/g,
rx_escapable = /[\\\"\u0000-\u001f\u007f-\u009f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
rx_dangerous = /[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g;
function f(n) {
// Format integers to have at least two digits.
@ -201,9 +210,7 @@ if (typeof JSON !== 'object') {
String.prototype.toJSON = this_value;
}
var cx,
escapable,
gap,
var gap,
indent,
meta,
rep;
@ -216,13 +223,13 @@ if (typeof JSON !== 'object') {
// Otherwise we must also replace the offending characters with safe escape
// sequences.
escapable.lastIndex = 0;
return escapable.test(string)
? '"' + string.replace(escapable, function (a) {
rx_escapable.lastIndex = 0;
return rx_escapable.test(string)
? '"' + string.replace(rx_escapable, function (a) {
var c = meta[a];
return typeof c === 'string'
? c
: '\\u' + ('0000' + a.charCodeAt(0).toString(16)).slice(-4);
? c
: '\\u' + ('0000' + a.charCodeAt(0).toString(16)).slice(-4);
}) + '"'
: '"' + string + '"';
}
@ -369,7 +376,6 @@ if (typeof JSON !== 'object') {
// If the JSON object does not yet have a stringify method, give it one.
if (typeof JSON.stringify !== 'function') {
escapable = /[\\\"\u0000-\u001f\u007f-\u009f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g;
meta = { // table of character substitutions
'\b': '\\b',
'\t': '\\t',
@ -426,7 +432,6 @@ if (typeof JSON !== 'object') {
// If the JSON object does not yet have a parse method, give it one.
if (typeof JSON.parse !== 'function') {
cx = /[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g;
JSON.parse = function (text, reviver) {
// The parse method takes a text and an optional reviver function, and returns
@ -461,9 +466,9 @@ if (typeof JSON !== 'object') {
// incorrectly, either silently deleting them, or treating them as line endings.
text = String(text);
cx.lastIndex = 0;
if (cx.test(text)) {
text = text.replace(cx, function (a) {
rx_dangerous.lastIndex = 0;
if (rx_dangerous.test(text)) {
text = text.replace(rx_dangerous, function (a) {
return '\\u' +
('0000' + a.charCodeAt(0).toString(16)).slice(-4);
});
@ -483,11 +488,11 @@ if (typeof JSON !== 'object') {
// ',' or ':' or '{' or '}'. If that is so, then the text is safe for eval.
if (
/^[\],:{}\s]*$/.test(
rx_one.test(
text
.replace(/\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g, '@')
.replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g, ']')
.replace(/(?:^|:|,)(?:\s*\[)+/g, '')
.replace(rx_two, '@')
.replace(rx_three, ']')
.replace(rx_four, '')
)
) {