861 lines
39 KiB
JavaScript
861 lines
39 KiB
JavaScript
/*! JSON v3.2.6 | http://bestiejs.github.io/json3 | Copyright 2012-2013, Kit Cambridge | http://kit.mit-license.org */
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;(function (window) {
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// Convenience aliases.
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var getClass = {}.toString, isProperty, forEach, undef;
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// Detect the `define` function exposed by asynchronous module loaders. The
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// strict `define` check is necessary for compatibility with `r.js`.
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var isLoader = typeof define === "function" && define.amd;
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// Detect native implementations.
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var nativeJSON = typeof JSON == "object" && JSON;
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// Set up the JSON 3 namespace, preferring the CommonJS `exports` object if
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// available.
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var JSON3 = typeof exports == "object" && exports && !exports.nodeType && exports;
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if (JSON3 && nativeJSON) {
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// Explicitly delegate to the native `stringify` and `parse`
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// implementations in CommonJS environments.
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JSON3.stringify = nativeJSON.stringify;
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JSON3.parse = nativeJSON.parse;
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} else {
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// Export for web browsers, JavaScript engines, and asynchronous module
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// loaders, using the global `JSON` object if available.
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JSON3 = window.JSON = nativeJSON || {};
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}
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// Test the `Date#getUTC*` methods. Based on work by @Yaffle.
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var isExtended = new Date(-3509827334573292);
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try {
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// The `getUTCFullYear`, `Month`, and `Date` methods return nonsensical
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// results for certain dates in Opera >= 10.53.
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isExtended = isExtended.getUTCFullYear() == -109252 && isExtended.getUTCMonth() === 0 && isExtended.getUTCDate() === 1 &&
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// Safari < 2.0.2 stores the internal millisecond time value correctly,
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// but clips the values returned by the date methods to the range of
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// signed 32-bit integers ([-2 ** 31, 2 ** 31 - 1]).
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isExtended.getUTCHours() == 10 && isExtended.getUTCMinutes() == 37 && isExtended.getUTCSeconds() == 6 && isExtended.getUTCMilliseconds() == 708;
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} catch (exception) {}
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// Internal: Determines whether the native `JSON.stringify` and `parse`
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// implementations are spec-compliant. Based on work by Ken Snyder.
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function has(name) {
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if (has[name] !== undef) {
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// Return cached feature test result.
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return has[name];
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}
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var isSupported;
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if (name == "bug-string-char-index") {
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// IE <= 7 doesn't support accessing string characters using square
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// bracket notation. IE 8 only supports this for primitives.
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isSupported = "a"[0] != "a";
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} else if (name == "json") {
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// Indicates whether both `JSON.stringify` and `JSON.parse` are
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// supported.
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isSupported = has("json-stringify") && has("json-parse");
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} else {
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var value, serialized = '{"a":[1,true,false,null,"\\u0000\\b\\n\\f\\r\\t"]}';
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// Test `JSON.stringify`.
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if (name == "json-stringify") {
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var stringify = JSON3.stringify, stringifySupported = typeof stringify == "function" && isExtended;
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if (stringifySupported) {
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// A test function object with a custom `toJSON` method.
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(value = function () {
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return 1;
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}).toJSON = value;
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try {
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stringifySupported =
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// Firefox 3.1b1 and b2 serialize string, number, and boolean
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// primitives as object literals.
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stringify(0) === "0" &&
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// FF 3.1b1, b2, and JSON 2 serialize wrapped primitives as object
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// literals.
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stringify(new Number()) === "0" &&
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stringify(new String()) == '""' &&
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// FF 3.1b1, 2 throw an error if the value is `null`, `undefined`, or
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// does not define a canonical JSON representation (this applies to
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// objects with `toJSON` properties as well, *unless* they are nested
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// within an object or array).
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stringify(getClass) === undef &&
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// IE 8 serializes `undefined` as `"undefined"`. Safari <= 5.1.7 and
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// FF 3.1b3 pass this test.
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stringify(undef) === undef &&
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// Safari <= 5.1.7 and FF 3.1b3 throw `Error`s and `TypeError`s,
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// respectively, if the value is omitted entirely.
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stringify() === undef &&
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// FF 3.1b1, 2 throw an error if the given value is not a number,
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// string, array, object, Boolean, or `null` literal. This applies to
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// objects with custom `toJSON` methods as well, unless they are nested
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// inside object or array literals. YUI 3.0.0b1 ignores custom `toJSON`
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// methods entirely.
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stringify(value) === "1" &&
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stringify([value]) == "[1]" &&
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// Prototype <= 1.6.1 serializes `[undefined]` as `"[]"` instead of
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// `"[null]"`.
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stringify([undef]) == "[null]" &&
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// YUI 3.0.0b1 fails to serialize `null` literals.
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stringify(null) == "null" &&
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// FF 3.1b1, 2 halts serialization if an array contains a function:
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// `[1, true, getClass, 1]` serializes as "[1,true,],". FF 3.1b3
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// elides non-JSON values from objects and arrays, unless they
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// define custom `toJSON` methods.
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stringify([undef, getClass, null]) == "[null,null,null]" &&
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// Simple serialization test. FF 3.1b1 uses Unicode escape sequences
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// where character escape codes are expected (e.g., `\b` => `\u0008`).
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stringify({ "a": [value, true, false, null, "\x00\b\n\f\r\t"] }) == serialized &&
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// FF 3.1b1 and b2 ignore the `filter` and `width` arguments.
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stringify(null, value) === "1" &&
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stringify([1, 2], null, 1) == "[\n 1,\n 2\n]" &&
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// JSON 2, Prototype <= 1.7, and older WebKit builds incorrectly
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// serialize extended years.
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stringify(new Date(-8.64e15)) == '"-271821-04-20T00:00:00.000Z"' &&
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// The milliseconds are optional in ES 5, but required in 5.1.
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stringify(new Date(8.64e15)) == '"+275760-09-13T00:00:00.000Z"' &&
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// Firefox <= 11.0 incorrectly serializes years prior to 0 as negative
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// four-digit years instead of six-digit years. Credits: @Yaffle.
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stringify(new Date(-621987552e5)) == '"-000001-01-01T00:00:00.000Z"' &&
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// Safari <= 5.1.5 and Opera >= 10.53 incorrectly serialize millisecond
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// values less than 1000. Credits: @Yaffle.
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stringify(new Date(-1)) == '"1969-12-31T23:59:59.999Z"';
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} catch (exception) {
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stringifySupported = false;
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}
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}
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isSupported = stringifySupported;
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}
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// Test `JSON.parse`.
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if (name == "json-parse") {
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var parse = JSON3.parse;
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if (typeof parse == "function") {
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try {
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// FF 3.1b1, b2 will throw an exception if a bare literal is provided.
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// Conforming implementations should also coerce the initial argument to
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// a string prior to parsing.
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if (parse("0") === 0 && !parse(false)) {
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// Simple parsing test.
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value = parse(serialized);
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var parseSupported = value["a"].length == 5 && value["a"][0] === 1;
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if (parseSupported) {
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try {
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// Safari <= 5.1.2 and FF 3.1b1 allow unescaped tabs in strings.
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parseSupported = !parse('"\t"');
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} catch (exception) {}
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if (parseSupported) {
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try {
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// FF 4.0 and 4.0.1 allow leading `+` signs and leading
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// decimal points. FF 4.0, 4.0.1, and IE 9-10 also allow
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// certain octal literals.
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parseSupported = parse("01") !== 1;
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} catch (exception) {}
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}
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if (parseSupported) {
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try {
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// FF 4.0, 4.0.1, and Rhino 1.7R3-R4 allow trailing decimal
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// points. These environments, along with FF 3.1b1 and 2,
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// also allow trailing commas in JSON objects and arrays.
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parseSupported = parse("1.") !== 1;
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} catch (exception) {}
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}
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}
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}
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} catch (exception) {
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parseSupported = false;
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}
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}
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isSupported = parseSupported;
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}
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}
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return has[name] = !!isSupported;
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}
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if (!has("json")) {
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// Common `[[Class]]` name aliases.
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var functionClass = "[object Function]";
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var dateClass = "[object Date]";
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var numberClass = "[object Number]";
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var stringClass = "[object String]";
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var arrayClass = "[object Array]";
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var booleanClass = "[object Boolean]";
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// Detect incomplete support for accessing string characters by index.
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var charIndexBuggy = has("bug-string-char-index");
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// Define additional utility methods if the `Date` methods are buggy.
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if (!isExtended) {
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var floor = Math.floor;
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// A mapping between the months of the year and the number of days between
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// January 1st and the first of the respective month.
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var Months = [0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334];
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// Internal: Calculates the number of days between the Unix epoch and the
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// first day of the given month.
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var getDay = function (year, month) {
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return Months[month] + 365 * (year - 1970) + floor((year - 1969 + (month = +(month > 1))) / 4) - floor((year - 1901 + month) / 100) + floor((year - 1601 + month) / 400);
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};
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}
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// Internal: Determines if a property is a direct property of the given
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// object. Delegates to the native `Object#hasOwnProperty` method.
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if (!(isProperty = {}.hasOwnProperty)) {
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isProperty = function (property) {
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var members = {}, constructor;
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if ((members.__proto__ = null, members.__proto__ = {
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// The *proto* property cannot be set multiple times in recent
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// versions of Firefox and SeaMonkey.
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"toString": 1
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}, members).toString != getClass) {
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// Safari <= 2.0.3 doesn't implement `Object#hasOwnProperty`, but
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// supports the mutable *proto* property.
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isProperty = function (property) {
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// Capture and break the object's prototype chain (see section 8.6.2
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// of the ES 5.1 spec). The parenthesized expression prevents an
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// unsafe transformation by the Closure Compiler.
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var original = this.__proto__, result = property in (this.__proto__ = null, this);
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// Restore the original prototype chain.
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this.__proto__ = original;
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return result;
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};
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} else {
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// Capture a reference to the top-level `Object` constructor.
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constructor = members.constructor;
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// Use the `constructor` property to simulate `Object#hasOwnProperty` in
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// other environments.
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isProperty = function (property) {
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var parent = (this.constructor || constructor).prototype;
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return property in this && !(property in parent && this[property] === parent[property]);
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};
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}
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members = null;
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return isProperty.call(this, property);
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};
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}
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// Internal: A set of primitive types used by `isHostType`.
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var PrimitiveTypes = {
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'boolean': 1,
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'number': 1,
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'string': 1,
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'undefined': 1
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};
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// Internal: Determines if the given object `property` value is a
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// non-primitive.
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var isHostType = function (object, property) {
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var type = typeof object[property];
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return type == 'object' ? !!object[property] : !PrimitiveTypes[type];
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};
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// Internal: Normalizes the `for...in` iteration algorithm across
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// environments. Each enumerated key is yielded to a `callback` function.
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forEach = function (object, callback) {
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var size = 0, Properties, members, property;
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// Tests for bugs in the current environment's `for...in` algorithm. The
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// `valueOf` property inherits the non-enumerable flag from
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// `Object.prototype` in older versions of IE, Netscape, and Mozilla.
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(Properties = function () {
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this.valueOf = 0;
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}).prototype.valueOf = 0;
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// Iterate over a new instance of the `Properties` class.
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members = new Properties();
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for (property in members) {
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// Ignore all properties inherited from `Object.prototype`.
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if (isProperty.call(members, property)) {
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size++;
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}
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}
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Properties = members = null;
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// Normalize the iteration algorithm.
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if (!size) {
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// A list of non-enumerable properties inherited from `Object.prototype`.
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members = ["valueOf", "toString", "toLocaleString", "propertyIsEnumerable", "isPrototypeOf", "hasOwnProperty", "constructor"];
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// IE <= 8, Mozilla 1.0, and Netscape 6.2 ignore shadowed non-enumerable
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// properties.
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forEach = function (object, callback) {
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var isFunction = getClass.call(object) == functionClass, property, length;
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var hasProperty = !isFunction && typeof object.constructor != 'function' && isHostType(object, 'hasOwnProperty') ? object.hasOwnProperty : isProperty;
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for (property in object) {
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// Gecko <= 1.0 enumerates the `prototype` property of functions under
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// certain conditions; IE does not.
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if (!(isFunction && property == "prototype") && hasProperty.call(object, property)) {
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callback(property);
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}
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}
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// Manually invoke the callback for each non-enumerable property.
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for (length = members.length; property = members[--length]; hasProperty.call(object, property) && callback(property));
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};
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} else if (size == 2) {
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// Safari <= 2.0.4 enumerates shadowed properties twice.
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forEach = function (object, callback) {
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// Create a set of iterated properties.
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var members = {}, isFunction = getClass.call(object) == functionClass, property;
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for (property in object) {
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// Store each property name to prevent double enumeration. The
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// `prototype` property of functions is not enumerated due to cross-
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// environment inconsistencies.
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if (!(isFunction && property == "prototype") && !isProperty.call(members, property) && (members[property] = 1) && isProperty.call(object, property)) {
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callback(property);
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}
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}
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};
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} else {
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// No bugs detected; use the standard `for...in` algorithm.
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forEach = function (object, callback) {
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var isFunction = getClass.call(object) == functionClass, property, isConstructor;
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for (property in object) {
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if (!(isFunction && property == "prototype") && isProperty.call(object, property) && !(isConstructor = property === "constructor")) {
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callback(property);
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}
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}
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// Manually invoke the callback for the `constructor` property due to
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// cross-environment inconsistencies.
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if (isConstructor || isProperty.call(object, (property = "constructor"))) {
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callback(property);
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}
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};
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}
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return forEach(object, callback);
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};
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// Public: Serializes a JavaScript `value` as a JSON string. The optional
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// `filter` argument may specify either a function that alters how object and
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// array members are serialized, or an array of strings and numbers that
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// indicates which properties should be serialized. The optional `width`
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// argument may be either a string or number that specifies the indentation
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// level of the output.
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if (!has("json-stringify")) {
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// Internal: A map of control characters and their escaped equivalents.
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var Escapes = {
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92: "\\\\",
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34: '\\"',
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8: "\\b",
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12: "\\f",
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10: "\\n",
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13: "\\r",
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9: "\\t"
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};
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// Internal: Converts `value` into a zero-padded string such that its
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// length is at least equal to `width`. The `width` must be <= 6.
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var leadingZeroes = "000000";
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var toPaddedString = function (width, value) {
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// The `|| 0` expression is necessary to work around a bug in
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// Opera <= 7.54u2 where `0 == -0`, but `String(-0) !== "0"`.
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return (leadingZeroes + (value || 0)).slice(-width);
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};
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// Internal: Double-quotes a string `value`, replacing all ASCII control
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// characters (characters with code unit values between 0 and 31) with
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// their escaped equivalents. This is an implementation of the
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// `Quote(value)` operation defined in ES 5.1 section 15.12.3.
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var unicodePrefix = "\\u00";
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var quote = function (value) {
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var result = '"', index = 0, length = value.length, isLarge = length > 10 && charIndexBuggy, symbols;
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if (isLarge) {
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symbols = value.split("");
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}
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for (; index < length; index++) {
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var charCode = value.charCodeAt(index);
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// If the character is a control character, append its Unicode or
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// shorthand escape sequence; otherwise, append the character as-is.
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switch (charCode) {
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case 8: case 9: case 10: case 12: case 13: case 34: case 92:
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result += Escapes[charCode];
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break;
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default:
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if (charCode < 32) {
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result += unicodePrefix + toPaddedString(2, charCode.toString(16));
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break;
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}
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result += isLarge ? symbols[index] : charIndexBuggy ? value.charAt(index) : value[index];
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}
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}
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return result + '"';
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};
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// Internal: Recursively serializes an object. Implements the
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// `Str(key, holder)`, `JO(value)`, and `JA(value)` operations.
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var serialize = function (property, object, callback, properties, whitespace, indentation, stack) {
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var value, className, year, month, date, time, hours, minutes, seconds, milliseconds, results, element, index, length, prefix, result;
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try {
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// Necessary for host object support.
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value = object[property];
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} catch (exception) {}
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if (typeof value == "object" && value) {
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className = getClass.call(value);
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if (className == dateClass && !isProperty.call(value, "toJSON")) {
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if (value > -1 / 0 && value < 1 / 0) {
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// Dates are serialized according to the `Date#toJSON` method
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// specified in ES 5.1 section 15.9.5.44. See section 15.9.1.15
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// for the ISO 8601 date time string format.
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if (getDay) {
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// Manually compute the year, month, date, hours, minutes,
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// seconds, and milliseconds if the `getUTC*` methods are
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// buggy. Adapted from @Yaffle's `date-shim` project.
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date = floor(value / 864e5);
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for (year = floor(date / 365.2425) + 1970 - 1; getDay(year + 1, 0) <= date; year++);
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for (month = floor((date - getDay(year, 0)) / 30.42); getDay(year, month + 1) <= date; month++);
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date = 1 + date - getDay(year, month);
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// The `time` value specifies the time within the day (see ES
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// 5.1 section 15.9.1.2). The formula `(A % B + B) % B` is used
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// to compute `A modulo B`, as the `%` operator does not
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// correspond to the `modulo` operation for negative numbers.
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time = (value % 864e5 + 864e5) % 864e5;
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// The hours, minutes, seconds, and milliseconds are obtained by
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// decomposing the time within the day. See section 15.9.1.10.
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hours = floor(time / 36e5) % 24;
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minutes = floor(time / 6e4) % 60;
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seconds = floor(time / 1e3) % 60;
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milliseconds = time % 1e3;
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} else {
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year = value.getUTCFullYear();
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month = value.getUTCMonth();
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date = value.getUTCDate();
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hours = value.getUTCHours();
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minutes = value.getUTCMinutes();
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seconds = value.getUTCSeconds();
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milliseconds = value.getUTCMilliseconds();
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}
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// Serialize extended years correctly.
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value = (year <= 0 || year >= 1e4 ? (year < 0 ? "-" : "+") + toPaddedString(6, year < 0 ? -year : year) : toPaddedString(4, year)) +
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"-" + toPaddedString(2, month + 1) + "-" + toPaddedString(2, date) +
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// Months, dates, hours, minutes, and seconds should have two
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// digits; milliseconds should have three.
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"T" + toPaddedString(2, hours) + ":" + toPaddedString(2, minutes) + ":" + toPaddedString(2, seconds) +
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// Milliseconds are optional in ES 5.0, but required in 5.1.
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"." + toPaddedString(3, milliseconds) + "Z";
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} else {
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value = null;
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}
|
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} else if (typeof value.toJSON == "function" && ((className != numberClass && className != stringClass && className != arrayClass) || isProperty.call(value, "toJSON"))) {
|
|
// Prototype <= 1.6.1 adds non-standard `toJSON` methods to the
|
|
// `Number`, `String`, `Date`, and `Array` prototypes. JSON 3
|
|
// ignores all `toJSON` methods on these objects unless they are
|
|
// defined directly on an instance.
|
|
value = value.toJSON(property);
|
|
}
|
|
}
|
|
if (callback) {
|
|
// If a replacement function was provided, call it to obtain the value
|
|
// for serialization.
|
|
value = callback.call(object, property, value);
|
|
}
|
|
if (value === null) {
|
|
return "null";
|
|
}
|
|
className = getClass.call(value);
|
|
if (className == booleanClass) {
|
|
// Booleans are represented literally.
|
|
return "" + value;
|
|
} else if (className == numberClass) {
|
|
// JSON numbers must be finite. `Infinity` and `NaN` are serialized as
|
|
// `"null"`.
|
|
return value > -1 / 0 && value < 1 / 0 ? "" + value : "null";
|
|
} else if (className == stringClass) {
|
|
// Strings are double-quoted and escaped.
|
|
return quote("" + value);
|
|
}
|
|
// Recursively serialize objects and arrays.
|
|
if (typeof value == "object") {
|
|
// Check for cyclic structures. This is a linear search; performance
|
|
// is inversely proportional to the number of unique nested objects.
|
|
for (length = stack.length; length--;) {
|
|
if (stack[length] === value) {
|
|
// Cyclic structures cannot be serialized by `JSON.stringify`.
|
|
throw TypeError();
|
|
}
|
|
}
|
|
// Add the object to the stack of traversed objects.
|
|
stack.push(value);
|
|
results = [];
|
|
// Save the current indentation level and indent one additional level.
|
|
prefix = indentation;
|
|
indentation += whitespace;
|
|
if (className == arrayClass) {
|
|
// Recursively serialize array elements.
|
|
for (index = 0, length = value.length; index < length; index++) {
|
|
element = serialize(index, value, callback, properties, whitespace, indentation, stack);
|
|
results.push(element === undef ? "null" : element);
|
|
}
|
|
result = results.length ? (whitespace ? "[\n" + indentation + results.join(",\n" + indentation) + "\n" + prefix + "]" : ("[" + results.join(",") + "]")) : "[]";
|
|
} else {
|
|
// Recursively serialize object members. Members are selected from
|
|
// either a user-specified list of property names, or the object
|
|
// itself.
|
|
forEach(properties || value, function (property) {
|
|
var element = serialize(property, value, callback, properties, whitespace, indentation, stack);
|
|
if (element !== undef) {
|
|
// According to ES 5.1 section 15.12.3: "If `gap` {whitespace}
|
|
// is not the empty string, let `member` {quote(property) + ":"}
|
|
// be the concatenation of `member` and the `space` character."
|
|
// The "`space` character" refers to the literal space
|
|
// character, not the `space` {width} argument provided to
|
|
// `JSON.stringify`.
|
|
results.push(quote(property) + ":" + (whitespace ? " " : "") + element);
|
|
}
|
|
});
|
|
result = results.length ? (whitespace ? "{\n" + indentation + results.join(",\n" + indentation) + "\n" + prefix + "}" : ("{" + results.join(",") + "}")) : "{}";
|
|
}
|
|
// Remove the object from the traversed object stack.
|
|
stack.pop();
|
|
return result;
|
|
}
|
|
};
|
|
|
|
// Public: `JSON.stringify`. See ES 5.1 section 15.12.3.
|
|
JSON3.stringify = function (source, filter, width) {
|
|
var whitespace, callback, properties, className;
|
|
if (typeof filter == "function" || typeof filter == "object" && filter) {
|
|
if ((className = getClass.call(filter)) == functionClass) {
|
|
callback = filter;
|
|
} else if (className == arrayClass) {
|
|
// Convert the property names array into a makeshift set.
|
|
properties = {};
|
|
for (var index = 0, length = filter.length, value; index < length; value = filter[index++], ((className = getClass.call(value)), className == stringClass || className == numberClass) && (properties[value] = 1));
|
|
}
|
|
}
|
|
if (width) {
|
|
if ((className = getClass.call(width)) == numberClass) {
|
|
// Convert the `width` to an integer and create a string containing
|
|
// `width` number of space characters.
|
|
if ((width -= width % 1) > 0) {
|
|
for (whitespace = "", width > 10 && (width = 10); whitespace.length < width; whitespace += " ");
|
|
}
|
|
} else if (className == stringClass) {
|
|
whitespace = width.length <= 10 ? width : width.slice(0, 10);
|
|
}
|
|
}
|
|
// Opera <= 7.54u2 discards the values associated with empty string keys
|
|
// (`""`) only if they are used directly within an object member list
|
|
// (e.g., `!("" in { "": 1})`).
|
|
return serialize("", (value = {}, value[""] = source, value), callback, properties, whitespace, "", []);
|
|
};
|
|
}
|
|
|
|
// Public: Parses a JSON source string.
|
|
if (!has("json-parse")) {
|
|
var fromCharCode = String.fromCharCode;
|
|
|
|
// Internal: A map of escaped control characters and their unescaped
|
|
// equivalents.
|
|
var Unescapes = {
|
|
92: "\\",
|
|
34: '"',
|
|
47: "/",
|
|
98: "\b",
|
|
116: "\t",
|
|
110: "\n",
|
|
102: "\f",
|
|
114: "\r"
|
|
};
|
|
|
|
// Internal: Stores the parser state.
|
|
var Index, Source;
|
|
|
|
// Internal: Resets the parser state and throws a `SyntaxError`.
|
|
var abort = function() {
|
|
Index = Source = null;
|
|
throw SyntaxError();
|
|
};
|
|
|
|
// Internal: Returns the next token, or `"$"` if the parser has reached
|
|
// the end of the source string. A token may be a string, number, `null`
|
|
// literal, or Boolean literal.
|
|
var lex = function () {
|
|
var source = Source, length = source.length, value, begin, position, isSigned, charCode;
|
|
while (Index < length) {
|
|
charCode = source.charCodeAt(Index);
|
|
switch (charCode) {
|
|
case 9: case 10: case 13: case 32:
|
|
// Skip whitespace tokens, including tabs, carriage returns, line
|
|
// feeds, and space characters.
|
|
Index++;
|
|
break;
|
|
case 123: case 125: case 91: case 93: case 58: case 44:
|
|
// Parse a punctuator token (`{`, `}`, `[`, `]`, `:`, or `,`) at
|
|
// the current position.
|
|
value = charIndexBuggy ? source.charAt(Index) : source[Index];
|
|
Index++;
|
|
return value;
|
|
case 34:
|
|
// `"` delimits a JSON string; advance to the next character and
|
|
// begin parsing the string. String tokens are prefixed with the
|
|
// sentinel `@` character to distinguish them from punctuators and
|
|
// end-of-string tokens.
|
|
for (value = "@", Index++; Index < length;) {
|
|
charCode = source.charCodeAt(Index);
|
|
if (charCode < 32) {
|
|
// Unescaped ASCII control characters (those with a code unit
|
|
// less than the space character) are not permitted.
|
|
abort();
|
|
} else if (charCode == 92) {
|
|
// A reverse solidus (`\`) marks the beginning of an escaped
|
|
// control character (including `"`, `\`, and `/`) or Unicode
|
|
// escape sequence.
|
|
charCode = source.charCodeAt(++Index);
|
|
switch (charCode) {
|
|
case 92: case 34: case 47: case 98: case 116: case 110: case 102: case 114:
|
|
// Revive escaped control characters.
|
|
value += Unescapes[charCode];
|
|
Index++;
|
|
break;
|
|
case 117:
|
|
// `\u` marks the beginning of a Unicode escape sequence.
|
|
// Advance to the first character and validate the
|
|
// four-digit code point.
|
|
begin = ++Index;
|
|
for (position = Index + 4; Index < position; Index++) {
|
|
charCode = source.charCodeAt(Index);
|
|
// A valid sequence comprises four hexdigits (case-
|
|
// insensitive) that form a single hexadecimal value.
|
|
if (!(charCode >= 48 && charCode <= 57 || charCode >= 97 && charCode <= 102 || charCode >= 65 && charCode <= 70)) {
|
|
// Invalid Unicode escape sequence.
|
|
abort();
|
|
}
|
|
}
|
|
// Revive the escaped character.
|
|
value += fromCharCode("0x" + source.slice(begin, Index));
|
|
break;
|
|
default:
|
|
// Invalid escape sequence.
|
|
abort();
|
|
}
|
|
} else {
|
|
if (charCode == 34) {
|
|
// An unescaped double-quote character marks the end of the
|
|
// string.
|
|
break;
|
|
}
|
|
charCode = source.charCodeAt(Index);
|
|
begin = Index;
|
|
// Optimize for the common case where a string is valid.
|
|
while (charCode >= 32 && charCode != 92 && charCode != 34) {
|
|
charCode = source.charCodeAt(++Index);
|
|
}
|
|
// Append the string as-is.
|
|
value += source.slice(begin, Index);
|
|
}
|
|
}
|
|
if (source.charCodeAt(Index) == 34) {
|
|
// Advance to the next character and return the revived string.
|
|
Index++;
|
|
return value;
|
|
}
|
|
// Unterminated string.
|
|
abort();
|
|
default:
|
|
// Parse numbers and literals.
|
|
begin = Index;
|
|
// Advance past the negative sign, if one is specified.
|
|
if (charCode == 45) {
|
|
isSigned = true;
|
|
charCode = source.charCodeAt(++Index);
|
|
}
|
|
// Parse an integer or floating-point value.
|
|
if (charCode >= 48 && charCode <= 57) {
|
|
// Leading zeroes are interpreted as octal literals.
|
|
if (charCode == 48 && ((charCode = source.charCodeAt(Index + 1)), charCode >= 48 && charCode <= 57)) {
|
|
// Illegal octal literal.
|
|
abort();
|
|
}
|
|
isSigned = false;
|
|
// Parse the integer component.
|
|
for (; Index < length && ((charCode = source.charCodeAt(Index)), charCode >= 48 && charCode <= 57); Index++);
|
|
// Floats cannot contain a leading decimal point; however, this
|
|
// case is already accounted for by the parser.
|
|
if (source.charCodeAt(Index) == 46) {
|
|
position = ++Index;
|
|
// Parse the decimal component.
|
|
for (; position < length && ((charCode = source.charCodeAt(position)), charCode >= 48 && charCode <= 57); position++);
|
|
if (position == Index) {
|
|
// Illegal trailing decimal.
|
|
abort();
|
|
}
|
|
Index = position;
|
|
}
|
|
// Parse exponents. The `e` denoting the exponent is
|
|
// case-insensitive.
|
|
charCode = source.charCodeAt(Index);
|
|
if (charCode == 101 || charCode == 69) {
|
|
charCode = source.charCodeAt(++Index);
|
|
// Skip past the sign following the exponent, if one is
|
|
// specified.
|
|
if (charCode == 43 || charCode == 45) {
|
|
Index++;
|
|
}
|
|
// Parse the exponential component.
|
|
for (position = Index; position < length && ((charCode = source.charCodeAt(position)), charCode >= 48 && charCode <= 57); position++);
|
|
if (position == Index) {
|
|
// Illegal empty exponent.
|
|
abort();
|
|
}
|
|
Index = position;
|
|
}
|
|
// Coerce the parsed value to a JavaScript number.
|
|
return +source.slice(begin, Index);
|
|
}
|
|
// A negative sign may only precede numbers.
|
|
if (isSigned) {
|
|
abort();
|
|
}
|
|
// `true`, `false`, and `null` literals.
|
|
if (source.slice(Index, Index + 4) == "true") {
|
|
Index += 4;
|
|
return true;
|
|
} else if (source.slice(Index, Index + 5) == "false") {
|
|
Index += 5;
|
|
return false;
|
|
} else if (source.slice(Index, Index + 4) == "null") {
|
|
Index += 4;
|
|
return null;
|
|
}
|
|
// Unrecognized token.
|
|
abort();
|
|
}
|
|
}
|
|
// Return the sentinel `$` character if the parser has reached the end
|
|
// of the source string.
|
|
return "$";
|
|
};
|
|
|
|
// Internal: Parses a JSON `value` token.
|
|
var get = function (value) {
|
|
var results, hasMembers;
|
|
if (value == "$") {
|
|
// Unexpected end of input.
|
|
abort();
|
|
}
|
|
if (typeof value == "string") {
|
|
if ((charIndexBuggy ? value.charAt(0) : value[0]) == "@") {
|
|
// Remove the sentinel `@` character.
|
|
return value.slice(1);
|
|
}
|
|
// Parse object and array literals.
|
|
if (value == "[") {
|
|
// Parses a JSON array, returning a new JavaScript array.
|
|
results = [];
|
|
for (;; hasMembers || (hasMembers = true)) {
|
|
value = lex();
|
|
// A closing square bracket marks the end of the array literal.
|
|
if (value == "]") {
|
|
break;
|
|
}
|
|
// If the array literal contains elements, the current token
|
|
// should be a comma separating the previous element from the
|
|
// next.
|
|
if (hasMembers) {
|
|
if (value == ",") {
|
|
value = lex();
|
|
if (value == "]") {
|
|
// Unexpected trailing `,` in array literal.
|
|
abort();
|
|
}
|
|
} else {
|
|
// A `,` must separate each array element.
|
|
abort();
|
|
}
|
|
}
|
|
// Elisions and leading commas are not permitted.
|
|
if (value == ",") {
|
|
abort();
|
|
}
|
|
results.push(get(value));
|
|
}
|
|
return results;
|
|
} else if (value == "{") {
|
|
// Parses a JSON object, returning a new JavaScript object.
|
|
results = {};
|
|
for (;; hasMembers || (hasMembers = true)) {
|
|
value = lex();
|
|
// A closing curly brace marks the end of the object literal.
|
|
if (value == "}") {
|
|
break;
|
|
}
|
|
// If the object literal contains members, the current token
|
|
// should be a comma separator.
|
|
if (hasMembers) {
|
|
if (value == ",") {
|
|
value = lex();
|
|
if (value == "}") {
|
|
// Unexpected trailing `,` in object literal.
|
|
abort();
|
|
}
|
|
} else {
|
|
// A `,` must separate each object member.
|
|
abort();
|
|
}
|
|
}
|
|
// Leading commas are not permitted, object property names must be
|
|
// double-quoted strings, and a `:` must separate each property
|
|
// name and value.
|
|
if (value == "," || typeof value != "string" || (charIndexBuggy ? value.charAt(0) : value[0]) != "@" || lex() != ":") {
|
|
abort();
|
|
}
|
|
results[value.slice(1)] = get(lex());
|
|
}
|
|
return results;
|
|
}
|
|
// Unexpected token encountered.
|
|
abort();
|
|
}
|
|
return value;
|
|
};
|
|
|
|
// Internal: Updates a traversed object member.
|
|
var update = function(source, property, callback) {
|
|
var element = walk(source, property, callback);
|
|
if (element === undef) {
|
|
delete source[property];
|
|
} else {
|
|
source[property] = element;
|
|
}
|
|
};
|
|
|
|
// Internal: Recursively traverses a parsed JSON object, invoking the
|
|
// `callback` function for each value. This is an implementation of the
|
|
// `Walk(holder, name)` operation defined in ES 5.1 section 15.12.2.
|
|
var walk = function (source, property, callback) {
|
|
var value = source[property], length;
|
|
if (typeof value == "object" && value) {
|
|
// `forEach` can't be used to traverse an array in Opera <= 8.54
|
|
// because its `Object#hasOwnProperty` implementation returns `false`
|
|
// for array indices (e.g., `![1, 2, 3].hasOwnProperty("0")`).
|
|
if (getClass.call(value) == arrayClass) {
|
|
for (length = value.length; length--;) {
|
|
update(value, length, callback);
|
|
}
|
|
} else {
|
|
forEach(value, function (property) {
|
|
update(value, property, callback);
|
|
});
|
|
}
|
|
}
|
|
return callback.call(source, property, value);
|
|
};
|
|
|
|
// Public: `JSON.parse`. See ES 5.1 section 15.12.2.
|
|
JSON3.parse = function (source, callback) {
|
|
var result, value;
|
|
Index = 0;
|
|
Source = "" + source;
|
|
result = get(lex());
|
|
// If a JSON string contains multiple tokens, it is invalid.
|
|
if (lex() != "$") {
|
|
abort();
|
|
}
|
|
// Reset the parser state.
|
|
Index = Source = null;
|
|
return callback && getClass.call(callback) == functionClass ? walk((value = {}, value[""] = result, value), "", callback) : result;
|
|
};
|
|
}
|
|
}
|
|
|
|
// Export for asynchronous module loaders.
|
|
if (isLoader) {
|
|
define(function () {
|
|
return JSON3;
|
|
});
|
|
}
|
|
}(this));
|