forked from mirrors/gecko-dev
9e846bd48a
Differential Revision: https://phabricator.services.mozilla.com/D60514 --HG-- extra : moz-landing-system : lando
53 lines
1.6 KiB
C++
53 lines
1.6 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "mozilla/dom/TextEncoder.h"
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#include "mozilla/CheckedInt.h"
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#include "mozilla/UniquePtrExtensions.h"
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#include "nsReadableUtils.h"
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namespace mozilla {
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namespace dom {
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void TextEncoder::Encode(JSContext* aCx, JS::Handle<JSObject*> aObj,
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const nsACString& aUtf8String,
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JS::MutableHandle<JSObject*> aRetval,
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OOMReporter& aRv) {
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JSAutoRealm ar(aCx, aObj);
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JSObject* outView = Uint8Array::Create(aCx, aUtf8String);
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if (!outView) {
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aRv.ReportOOM();
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return;
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}
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aRetval.set(outView);
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}
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void TextEncoder::EncodeInto(JSContext* aCx, JS::Handle<JSString*> aSrc,
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const Uint8Array& aDst,
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TextEncoderEncodeIntoResult& aResult,
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OOMReporter& aError) {
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aDst.ComputeState();
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size_t read;
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size_t written;
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auto maybe = JS_EncodeStringToUTF8BufferPartial(
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aCx, aSrc, AsWritableChars(MakeSpan(aDst.Data(), aDst.Length())));
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if (!maybe) {
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aError.ReportOOM();
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return;
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}
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Tie(read, written) = *maybe;
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MOZ_ASSERT(written <= aDst.Length());
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aResult.mRead.Construct() = read;
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aResult.mWritten.Construct() = written;
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}
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void TextEncoder::GetEncoding(nsACString& aEncoding) {
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aEncoding.AssignLiteral("utf-8");
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}
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} // namespace dom
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} // namespace mozilla
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