56 lines
1.4 KiB
JavaScript
56 lines
1.4 KiB
JavaScript
'use strict';
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var GetIntrinsic = require('../GetIntrinsic');
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var $fromCharCode = GetIntrinsic('%String.fromCharCode%');
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var $TypeError = GetIntrinsic('%TypeError%');
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var callBound = require('../helpers/callBound');
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var forEach = require('../helpers/forEach');
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var isLeadingSurrogate = require('../helpers/isLeadingSurrogate');
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var isTrailingSurrogate = require('../helpers/isTrailingSurrogate');
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var $charCodeAt = callBound('String.prototype.charCodeAt');
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var Type = require('./Type');
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var UnicodeEscape = require('./UnicodeEscape');
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var UTF16Encoding = require('./UTF16Encoding');
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var UTF16DecodeString = require('./UTF16DecodeString');
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var has = require('has');
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// https://ecma-international.org/ecma-262/10.0/#sec-quotejsonstring
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var escapes = {
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'\u0008': '\\b',
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'\u0009': '\\t',
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'\u000A': '\\n',
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'\u000C': '\\f',
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'\u000D': '\\r',
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'\u0022': '\\"',
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'\u005c': '\\\\'
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};
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module.exports = function QuoteJSONString(value) {
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if (Type(value) !== 'String') {
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throw new $TypeError('Assertion failed: `value` must be a String');
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}
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var product = '"';
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if (value) {
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forEach(UTF16DecodeString(value), function (C) {
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if (has(escapes, C)) {
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product += escapes[C];
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} else {
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var cCharCode = $charCodeAt(C, 0);
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if (cCharCode < 0x20 || isLeadingSurrogate(C) || isTrailingSurrogate(C)) {
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product += UnicodeEscape(C);
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} else {
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product += $fromCharCode(UTF16Encoding(cCharCode));
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}
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}
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});
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}
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product += '"';
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return product;
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};
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