forked from mirrors/gecko-dev
222487304c
Instead, mark them as "can OOM", since we have that concept now. Differential Revision: https://phabricator.services.mozilla.com/D45251 --HG-- extra : moz-landing-system : lando
81 lines
2.5 KiB
C++
81 lines
2.5 KiB
C++
/* -*- 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/UniquePtrExtensions.h"
|
|
#include "nsReadableUtils.h"
|
|
|
|
namespace mozilla {
|
|
namespace dom {
|
|
|
|
void TextEncoder::Encode(JSContext* aCx, JS::Handle<JSObject*> aObj,
|
|
JS::Handle<JSString*> aString,
|
|
JS::MutableHandle<JSObject*> aRetval,
|
|
OOMReporter& aRv) {
|
|
CheckedInt<size_t> bufLen(JS::GetStringLength(aString));
|
|
bufLen *= 3; // from the contract for JS_EncodeStringToUTF8BufferPartial
|
|
// Uint8Array::Create takes uint32_t as the length.
|
|
if (!bufLen.isValid() || bufLen.value() > UINT32_MAX) {
|
|
aRv.ReportOOM();
|
|
return;
|
|
}
|
|
|
|
// TODO: Avoid malloc and use a stack-allocated buffer if bufLen
|
|
// is small.
|
|
auto data = mozilla::MakeUniqueFallible<uint8_t[]>(bufLen.value());
|
|
if (!data) {
|
|
aRv.ReportOOM();
|
|
return;
|
|
}
|
|
|
|
size_t read;
|
|
size_t written;
|
|
auto maybe = JS_EncodeStringToUTF8BufferPartial(
|
|
aCx, aString, AsWritableChars(MakeSpan(data.get(), bufLen.value())));
|
|
if (!maybe) {
|
|
aRv.ReportOOM();
|
|
return;
|
|
}
|
|
Tie(read, written) = *maybe;
|
|
MOZ_ASSERT(written <= bufLen.value());
|
|
MOZ_ASSERT(read == JS::GetStringLength(aString));
|
|
|
|
JSAutoRealm ar(aCx, aObj);
|
|
JSObject* outView = Uint8Array::Create(aCx, written, data.get());
|
|
if (!outView) {
|
|
aRv.ReportOOM();
|
|
return;
|
|
}
|
|
|
|
aRetval.set(outView);
|
|
}
|
|
|
|
void TextEncoder::EncodeInto(JSContext* aCx, JS::Handle<JSString*> aSrc,
|
|
const Uint8Array& aDst,
|
|
TextEncoderEncodeIntoResult& aResult,
|
|
OOMReporter& aError) {
|
|
aDst.ComputeLengthAndData();
|
|
size_t read;
|
|
size_t written;
|
|
auto maybe = JS_EncodeStringToUTF8BufferPartial(
|
|
aCx, aSrc, AsWritableChars(MakeSpan(aDst.Data(), aDst.Length())));
|
|
if (!maybe) {
|
|
aError.ReportOOM();
|
|
return;
|
|
}
|
|
Tie(read, written) = *maybe;
|
|
MOZ_ASSERT(written <= aDst.Length());
|
|
aResult.mRead.Construct() = read;
|
|
aResult.mWritten.Construct() = written;
|
|
}
|
|
|
|
void TextEncoder::GetEncoding(nsACString& aEncoding) {
|
|
aEncoding.AssignLiteral("utf-8");
|
|
}
|
|
|
|
} // namespace dom
|
|
} // namespace mozilla
|