mirror of
https://github.com/react/react-native-devtools-frontend.git
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Tim van der Lippe
2c89197d0d
R=jacktfranklin@chromium.org No-Presubmit: True Bug: none Change-Id: I52dc24b12e350787085c5e3d131cface7ea87142 Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/3060705 Commit-Queue: Tim van der Lippe <tvanderlippe@chromium.org> Reviewed-by: Paul Lewis <aerotwist@chromium.org>
22 lines
823 B
JavaScript
22 lines
823 B
JavaScript
'use strict';
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var GetIntrinsic = require('get-intrinsic');
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var $TypeError = GetIntrinsic('%TypeError%');
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var $fromCharCode = GetIntrinsic('%String.fromCharCode%');
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// https://262.ecma-international.org/7.0/#sec-utf16decode
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var isLeadingSurrogate = require('../helpers/isLeadingSurrogate');
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var isTrailingSurrogate = require('../helpers/isTrailingSurrogate');
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// https://262.ecma-international.org/11.0/#sec-utf16decodesurrogatepair
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module.exports = function UTF16Decode(lead, trail) {
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if (!isLeadingSurrogate(lead) || !isTrailingSurrogate(trail)) {
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throw new $TypeError('Assertion failed: `lead` must be a leading surrogate char code, and `trail` must be a trailing surrogate char code');
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}
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// var cp = (lead - 0xD800) * 0x400 + (trail - 0xDC00) + 0x10000;
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return $fromCharCode(lead) + $fromCharCode(trail);
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};
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