зеркало из https://github.com/mozilla/gecko-dev.git
97 строки
2.4 KiB
C++
97 строки
2.4 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 "MemoryOutputStream.h"
|
|
|
|
#include "ErrorList.h"
|
|
#include "mozilla/Assertions.h"
|
|
#include "mozilla/MacroForEach.h"
|
|
#include "mozilla/RefPtr.h"
|
|
#include "mozilla/fallible.h"
|
|
#include "nsDebug.h"
|
|
#include "nsError.h"
|
|
#include "nsStreamUtils.h"
|
|
#include "nscore.h"
|
|
|
|
class nsIInputStream;
|
|
|
|
namespace mozilla::dom::quota {
|
|
|
|
// static
|
|
already_AddRefed<MemoryOutputStream> MemoryOutputStream::Create(
|
|
uint64_t aSize) {
|
|
MOZ_ASSERT(aSize, "Passed zero size!");
|
|
|
|
if (NS_WARN_IF(aSize > UINT32_MAX)) {
|
|
return nullptr;
|
|
}
|
|
|
|
RefPtr<MemoryOutputStream> stream = new MemoryOutputStream();
|
|
|
|
if (NS_WARN_IF(!stream->mData.SetLength(aSize, fallible))) {
|
|
return nullptr;
|
|
}
|
|
|
|
return stream.forget();
|
|
}
|
|
|
|
NS_IMPL_ISUPPORTS(MemoryOutputStream, nsIOutputStream)
|
|
|
|
NS_IMETHODIMP
|
|
MemoryOutputStream::Close() {
|
|
mData.Truncate(mOffset);
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
MemoryOutputStream::Write(const char* aBuf, uint32_t aCount,
|
|
uint32_t* _retval) {
|
|
return WriteSegments(NS_CopySegmentToBuffer, (char*)aBuf, aCount, _retval);
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
MemoryOutputStream::Flush() { return NS_OK; }
|
|
|
|
NS_IMETHODIMP
|
|
MemoryOutputStream::WriteFrom(nsIInputStream* aFromStream, uint32_t aCount,
|
|
uint32_t* _retval) {
|
|
return NS_ERROR_NOT_IMPLEMENTED;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
MemoryOutputStream::WriteSegments(nsReadSegmentFun aReader, void* aClosure,
|
|
uint32_t aCount, uint32_t* _retval) {
|
|
MOZ_ASSERT(mData.Length() >= mOffset, "Bad stream state!");
|
|
|
|
uint32_t maxCount = mData.Length() - mOffset;
|
|
if (maxCount == 0) {
|
|
*_retval = 0;
|
|
return NS_OK;
|
|
}
|
|
|
|
if (aCount > maxCount) {
|
|
aCount = maxCount;
|
|
}
|
|
|
|
nsresult rv = aReader(this, aClosure, mData.BeginWriting() + mOffset, 0,
|
|
aCount, _retval);
|
|
if (NS_SUCCEEDED(rv)) {
|
|
MOZ_ASSERT(*_retval <= aCount,
|
|
"Reader should not read more than we asked it to read!");
|
|
mOffset += *_retval;
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
MemoryOutputStream::IsNonBlocking(bool* _retval) {
|
|
*_retval = false;
|
|
return NS_OK;
|
|
}
|
|
|
|
} // namespace mozilla::dom::quota
|