mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-01 06:35:42 +00:00
91 lines
2.1 KiB
C++
91 lines
2.1 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* vim: set ts=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 "MemoryStreams.h"
|
|
|
|
#include "nsStreamUtils.h"
|
|
|
|
USING_FILE_NAMESPACE
|
|
|
|
// static
|
|
already_AddRefed<MemoryOutputStream>
|
|
MemoryOutputStream::Create(uint64_t aSize)
|
|
{
|
|
NS_ASSERTION(aSize, "Passed zero size!");
|
|
|
|
NS_ENSURE_TRUE(aSize <= UINT32_MAX, nullptr);
|
|
|
|
nsRefPtr<MemoryOutputStream> stream = new MemoryOutputStream();
|
|
|
|
char* dummy;
|
|
uint32_t length = stream->mData.GetMutableData(&dummy, aSize, fallible_t());
|
|
NS_ENSURE_TRUE(length == aSize, nullptr);
|
|
|
|
return stream.forget();
|
|
}
|
|
|
|
NS_IMPL_ISUPPORTS1(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)
|
|
{
|
|
NS_ASSERTION(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)) {
|
|
NS_ASSERTION(*_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;
|
|
}
|