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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "mozilla/dom/TextEncoder.h"
#include "mozilla/CheckedInt.h"
#include "mozilla/ErrorResult.h"
#include "mozilla/UniquePtrExtensions.h"
#include "nsReadableUtils.h"
namespace mozilla::dom {
void TextEncoder::Encode(JSContext* aCx, JS::Handle<JSObject*> aObj,
const nsACString& aUtf8String,
JS::MutableHandle<JSObject*> aRetval,
ErrorResult& aRv) {
JSAutoRealm ar(aCx, aObj);
JSObject* outView = Uint8Array::Create(aCx, aUtf8String, aRv);
if (aRv.Failed()) {
return;
}
aRetval.set(outView);
}
void TextEncoder::EncodeInto(JSContext* aCx, JS::Handle<JSString*> aSrc,
const Uint8Array& aDst,
TextEncoderEncodeIntoResult& aResult,
OOMReporter& aError) {
DebugOnly<size_t> dstLength = 0;
auto maybe = aDst.ProcessData(
[&](const Span<uint8_t>& aData, JS::AutoCheckCannotGC&&) {
dstLength = aData.Length();
return JS_EncodeStringToUTF8BufferPartial(aCx, aSrc,
AsWritableChars(aData));
});
if (!maybe) {
aError.ReportOOM();
return;
}
size_t read;
size_t written;
std::tie(read, written) = *maybe;
MOZ_ASSERT(written <= dstLength);
aResult.mRead.Construct() = read;
aResult.mWritten.Construct() = written;
}
void TextEncoder::GetEncoding(nsACString& aEncoding) {
aEncoding.AssignLiteral("utf-8");
}
} // namespace mozilla::dom
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