var $ = require('../internals/export');
+var global = require('../internals/global');
var getBuiltIn = require('../internals/get-built-in');
+var apply = require('../internals/function-apply');
+var uncurryThis = require('../internals/function-uncurry-this');
var fails = require('../internals/fails');
+var Array = global.Array;
var $stringify = getBuiltIn('JSON', 'stringify');
-var re = /[\uD800-\uDFFF]/g;
+var exec = uncurryThis(/./.exec);
+var charAt = uncurryThis(''.charAt);
+var charCodeAt = uncurryThis(''.charCodeAt);
+var replace = uncurryThis(''.replace);
+var numberToString = uncurryThis(1.0.toString);
+
+var tester = /[\uD800-\uDFFF]/g;
var low = /^[\uD800-\uDBFF]$/;
var hi = /^[\uDC00-\uDFFF]$/;
var fix = function (match, offset, string) {
- var prev = string.charAt(offset - 1);
- var next = string.charAt(offset + 1);
- if ((low.test(match) && !hi.test(next)) || (hi.test(match) && !low.test(prev))) {
- return '\\u' + match.charCodeAt(0).toString(16);
+ var prev = charAt(string, offset - 1);
+ var next = charAt(string, offset + 1);
+ if ((exec(low, match) && !exec(hi, next)) || (exec(hi, match) && !exec(low, prev))) {
+ return '\\u' + numberToString(charCodeAt(match, 0), 16);
} return match;
};
$({ target: 'JSON', stat: true, forced: FORCED }, {
// eslint-disable-next-line no-unused-vars -- required for `.length`
stringify: function stringify(it, replacer, space) {
- var result = $stringify.apply(null, arguments);
- return typeof result == 'string' ? result.replace(re, fix) : result;
+ for (var i = 0, l = arguments.length, args = Array(l); i < l; i++) args[i] = arguments[i];
+ var result = apply($stringify, null, args);
+ return typeof result == 'string' ? replace(result, tester, fix) : result;
}
});
}