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- 'use strict';
- var $ = require('../internals/export');
- var getBuiltIn = require('../internals/get-built-in');
- var apply = require('../internals/function-apply');
- var call = require('../internals/function-call');
- var uncurryThis = require('../internals/function-uncurry-this');
- var fails = require('../internals/fails');
- var isArray = require('../internals/is-array');
- var isCallable = require('../internals/is-callable');
- var isRawJSON = require('../internals/is-raw-json');
- var isSymbol = require('../internals/is-symbol');
- var classof = require('../internals/classof-raw');
- var toString = require('../internals/to-string');
- var arraySlice = require('../internals/array-slice');
- var parseJSONString = require('../internals/parse-json-string');
- var uid = require('../internals/uid');
- var NATIVE_SYMBOL = require('../internals/symbol-constructor-detection');
- var NATIVE_RAW_JSON = require('../internals/native-raw-json');
- var $String = String;
- var $stringify = getBuiltIn('JSON', 'stringify');
- var exec = uncurryThis(/./.exec);
- var charAt = uncurryThis(''.charAt);
- var charCodeAt = uncurryThis(''.charCodeAt);
- var replace = uncurryThis(''.replace);
- var slice = uncurryThis(''.slice);
- var push = uncurryThis([].push);
- var numberToString = uncurryThis(1.1.toString);
- var surrogates = /[\uD800-\uDFFF]/g;
- var lowSurrogates = /^[\uD800-\uDBFF]$/;
- var hiSurrogates = /^[\uDC00-\uDFFF]$/;
- var MARK = uid();
- var MARK_LENGTH = MARK.length;
- var WRONG_SYMBOLS_CONVERSION = !NATIVE_SYMBOL || fails(function () {
- var symbol = getBuiltIn('Symbol')('stringify detection');
- // MS Edge converts symbol values to JSON as {}
- return $stringify([symbol]) !== '[null]'
- // WebKit converts symbol values to JSON as null
- || $stringify({ a: symbol }) !== '{}'
- // V8 throws on boxed symbols
- || $stringify(Object(symbol)) !== '{}';
- });
- // https://github.com/tc39/proposal-well-formed-stringify
- var ILL_FORMED_UNICODE = fails(function () {
- return $stringify('\uDF06\uD834') !== '"\\udf06\\ud834"'
- || $stringify('\uDEAD') !== '"\\udead"';
- });
- var stringifyWithProperSymbolsConversion = WRONG_SYMBOLS_CONVERSION ? function (it, replacer) {
- var args = arraySlice(arguments);
- var $replacer = getReplacerFunction(replacer);
- if (!isCallable($replacer) && (it === undefined || isSymbol(it))) return; // IE8 returns string on undefined
- args[1] = function (key, value) {
- // some old implementations (like WebKit) could pass numbers as keys
- if (isCallable($replacer)) value = call($replacer, this, $String(key), value);
- if (!isSymbol(value)) return value;
- };
- return apply($stringify, null, args);
- } : $stringify;
- var fixIllFormedJSON = function (match, offset, string) {
- var prev = charAt(string, offset - 1);
- var next = charAt(string, offset + 1);
- if ((exec(lowSurrogates, match) && !exec(hiSurrogates, next)) || (exec(hiSurrogates, match) && !exec(lowSurrogates, prev))) {
- return '\\u' + numberToString(charCodeAt(match, 0), 16);
- } return match;
- };
- var getReplacerFunction = function (replacer) {
- if (isCallable(replacer)) return replacer;
- if (!isArray(replacer)) return;
- var rawLength = replacer.length;
- var keys = [];
- for (var i = 0; i < rawLength; i++) {
- var element = replacer[i];
- if (typeof element == 'string') push(keys, element);
- else if (typeof element == 'number' || classof(element) === 'Number' || classof(element) === 'String') push(keys, toString(element));
- }
- var keysLength = keys.length;
- var root = true;
- return function (key, value) {
- if (root) {
- root = false;
- return value;
- }
- if (isArray(this)) return value;
- for (var j = 0; j < keysLength; j++) if (keys[j] === key) return value;
- };
- };
- // `JSON.stringify` method
- // https://tc39.es/ecma262/#sec-json.stringify
- // https://github.com/tc39/proposal-json-parse-with-source
- if ($stringify) $({ target: 'JSON', stat: true, arity: 3, forced: WRONG_SYMBOLS_CONVERSION || ILL_FORMED_UNICODE || !NATIVE_RAW_JSON }, {
- stringify: function stringify(text, replacer, space) {
- var replacerFunction = getReplacerFunction(replacer);
- var rawStrings = [];
- var json = stringifyWithProperSymbolsConversion(text, function (key, value) {
- // some old implementations (like WebKit) could pass numbers as keys
- var v = isCallable(replacerFunction) ? call(replacerFunction, this, $String(key), value) : value;
- return !NATIVE_RAW_JSON && isRawJSON(v) ? MARK + (push(rawStrings, v.rawJSON) - 1) : v;
- }, space);
- if (typeof json != 'string') return json;
- if (ILL_FORMED_UNICODE) json = replace(json, surrogates, fixIllFormedJSON);
- if (NATIVE_RAW_JSON) return json;
- var result = '';
- var length = json.length;
- for (var i = 0; i < length; i++) {
- var chr = charAt(json, i);
- if (chr === '"') {
- var end = parseJSONString(json, ++i).end - 1;
- var string = slice(json, i, end);
- result += slice(string, 0, MARK_LENGTH) === MARK
- ? rawStrings[slice(string, MARK_LENGTH)]
- : '"' + string + '"';
- i = end;
- } else result += chr;
- }
- return result;
- }
- });
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