85 lines
3.2 KiB
JavaScript
85 lines
3.2 KiB
JavaScript
'use strict';
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var $ = require('../internals/export');
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var FREEZING = require('../internals/freezing');
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var NATIVE_RAW_JSON = require('../internals/native-raw-json');
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var getBuiltIn = require('../internals/get-built-in');
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var call = require('../internals/function-call');
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var uncurryThis = require('../internals/function-uncurry-this');
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var isCallable = require('../internals/is-callable');
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var isRawJSON = require('../internals/is-raw-json');
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var toString = require('../internals/to-string');
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var createProperty = require('../internals/create-property');
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var parseJSONString = require('../internals/parse-json-string');
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var getReplacerFunction = require('../internals/get-json-replacer-function');
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var uid = require('../internals/uid');
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var setInternalState = require('../internals/internal-state').set;
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var $String = String;
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var $SyntaxError = SyntaxError;
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var parse = getBuiltIn('JSON', 'parse');
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var $stringify = getBuiltIn('JSON', 'stringify');
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var create = getBuiltIn('Object', 'create');
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var freeze = getBuiltIn('Object', 'freeze');
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var at = uncurryThis(''.charAt);
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var slice = uncurryThis(''.slice);
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var exec = uncurryThis(/./.exec);
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var push = uncurryThis([].push);
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var MARK = uid();
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var MARK_LENGTH = MARK.length;
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var ERROR_MESSAGE = 'Unacceptable as raw JSON';
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var IS_WHITESPACE = /^[\t\n\r ]$/;
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// `JSON.parse` method
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// https://tc39.es/proposal-json-parse-with-source/#sec-json.israwjson
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// https://github.com/tc39/proposal-json-parse-with-source
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$({ target: 'JSON', stat: true, forced: !NATIVE_RAW_JSON }, {
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rawJSON: function rawJSON(text) {
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var jsonString = toString(text);
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if (jsonString === '' || exec(IS_WHITESPACE, at(jsonString, 0)) || exec(IS_WHITESPACE, at(jsonString, jsonString.length - 1))) {
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throw $SyntaxError(ERROR_MESSAGE);
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}
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var parsed = parse(jsonString);
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if (typeof parsed == 'object' && parsed !== null) throw $SyntaxError(ERROR_MESSAGE);
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var obj = create(null);
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setInternalState(obj, { type: 'RawJSON' });
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createProperty(obj, 'rawJSON', jsonString);
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return FREEZING ? freeze(obj) : obj;
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}
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});
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// `JSON.stringify` method
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// https://tc39.es/ecma262/#sec-json.stringify
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// https://github.com/tc39/proposal-json-parse-with-source
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if ($stringify) $({ target: 'JSON', stat: true, arity: 3, forced: !NATIVE_RAW_JSON }, {
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stringify: function stringify(text, replacer, space) {
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var replacerFunction = getReplacerFunction(replacer);
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var rawStrings = [];
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var json = $stringify(text, function (key, value) {
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// some old implementations (like WebKit) could pass numbers as keys
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var v = isCallable(replacerFunction) ? call(replacerFunction, this, $String(key), value) : value;
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return isRawJSON(v) ? MARK + (push(rawStrings, v.rawJSON) - 1) : v;
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}, space);
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if (typeof json != 'string') return json;
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var result = '';
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var length = json.length;
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for (var i = 0; i < length; i++) {
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var chr = at(json, i);
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if (chr === '"') {
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var end = parseJSONString(json, ++i).end - 1;
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var string = slice(json, i, end);
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result += slice(string, 0, MARK_LENGTH) === MARK
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? rawStrings[slice(string, MARK_LENGTH)]
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: '"' + string + '"';
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i = end;
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} else result += chr;
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}
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return result;
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}
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});
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