gecko/dom/filehandle/MemoryStreams.cpp
Jan Varga 6adeb3c23f Bug 975696 - Split ArchiveReader and FileHandle implementation into separate dirs. r=bent f=baku
--HG--
rename : dom/file/ArchiveEvent.cpp => dom/archivereader/ArchiveEvent.cpp
rename : dom/file/ArchiveEvent.h => dom/archivereader/ArchiveEvent.h
rename : dom/file/ArchiveReader.cpp => dom/archivereader/ArchiveReader.cpp
rename : dom/file/ArchiveReader.h => dom/archivereader/ArchiveReader.h
rename : dom/file/ArchiveRequest.cpp => dom/archivereader/ArchiveRequest.cpp
rename : dom/file/ArchiveRequest.h => dom/archivereader/ArchiveRequest.h
rename : dom/file/ArchiveZipEvent.cpp => dom/archivereader/ArchiveZipEvent.cpp
rename : dom/file/ArchiveZipEvent.h => dom/archivereader/ArchiveZipEvent.h
rename : dom/file/ArchiveZipFile.cpp => dom/archivereader/ArchiveZipFile.cpp
rename : dom/file/ArchiveZipFile.h => dom/archivereader/ArchiveZipFile.h
rename : dom/file/test/test_archivereader.html => dom/archivereader/test/test_basic.html
rename : dom/file/test/test_archivereader_nonUnicode.html => dom/archivereader/test/test_nonUnicode.html
rename : dom/file/test/test_archivereader_zip_in_zip.html => dom/archivereader/test/test_zip_in_zip.html
rename : dom/file/test/test_bug_793311.html => dom/base/test/test_bug793311.html
rename : dom/file/AsyncHelper.cpp => dom/filehandle/AsyncHelper.cpp
rename : dom/file/AsyncHelper.h => dom/filehandle/AsyncHelper.h
rename : dom/file/File.cpp => dom/filehandle/File.cpp
rename : dom/file/File.h => dom/filehandle/File.h
rename : dom/file/FileHandle.cpp => dom/filehandle/FileHandle.cpp
rename : dom/file/FileHandle.h => dom/filehandle/FileHandle.h
rename : dom/file/FileHelper.cpp => dom/filehandle/FileHelper.cpp
rename : dom/file/FileHelper.h => dom/filehandle/FileHelper.h
rename : dom/file/FileRequest.cpp => dom/filehandle/FileRequest.cpp
rename : dom/file/FileRequest.h => dom/filehandle/FileRequest.h
rename : dom/file/FileService.cpp => dom/filehandle/FileService.cpp
rename : dom/file/FileService.h => dom/filehandle/FileService.h
rename : dom/file/FileStreamWrappers.cpp => dom/filehandle/FileStreamWrappers.cpp
rename : dom/file/FileStreamWrappers.h => dom/filehandle/FileStreamWrappers.h
rename : dom/file/LockedFile.cpp => dom/filehandle/LockedFile.cpp
rename : dom/file/LockedFile.h => dom/filehandle/LockedFile.h
rename : dom/file/MemoryStreams.cpp => dom/filehandle/MemoryStreams.cpp
rename : dom/file/MemoryStreams.h => dom/filehandle/MemoryStreams.h
rename : dom/file/MetadataHelper.cpp => dom/filehandle/MetadataHelper.cpp
rename : dom/file/MetadataHelper.h => dom/filehandle/MetadataHelper.h
rename : dom/file/moz.build => dom/filehandle/moz.build
rename : dom/file/nsIFileStorage.h => dom/filehandle/nsIFileStorage.h
rename : dom/file/test/dummy_worker.js => dom/filehandle/test/dummy_worker.js
rename : dom/file/test/helpers.js => dom/filehandle/test/helpers.js
rename : dom/file/test/mochitest.ini => dom/filehandle/test/mochitest.ini
rename : dom/file/test/moz.build => dom/filehandle/test/moz.build
rename : dom/file/test/test_append_read_data.html => dom/filehandle/test/test_append_read_data.html
rename : dom/file/test/test_getFile.html => dom/filehandle/test/test_getFile.html
rename : dom/file/test/test_getFileId.html => dom/filehandle/test/test_getFileId.html
rename : dom/file/test/test_location.html => dom/filehandle/test/test_location.html
rename : dom/file/test/test_lockedfile_lifetimes.html => dom/filehandle/test/test_lockedfile_lifetimes.html
rename : dom/file/test/test_lockedfile_lifetimes_nested.html => dom/filehandle/test/test_lockedfile_lifetimes_nested.html
rename : dom/file/test/test_lockedfile_ordering.html => dom/filehandle/test/test_lockedfile_ordering.html
rename : dom/file/test/test_overlapping_lockedfiles.html => dom/filehandle/test/test_overlapping_lockedfiles.html
rename : dom/file/test/test_progress_events.html => dom/filehandle/test/test_progress_events.html
rename : dom/file/test/test_readonly_lockedfiles.html => dom/filehandle/test/test_readonly_lockedfiles.html
rename : dom/file/test/test_request_readyState.html => dom/filehandle/test/test_request_readyState.html
rename : dom/file/test/test_stream_tracking.html => dom/filehandle/test/test_stream_tracking.html
rename : dom/file/test/test_success_events_after_abort.html => dom/filehandle/test/test_success_events_after_abort.html
rename : dom/file/test/test_truncate.html => dom/filehandle/test/test_truncate.html
rename : dom/file/test/test_workers.html => dom/filehandle/test/test_workers.html
rename : dom/file/test/test_write_read_data.html => dom/filehandle/test/test_write_read_data.html
2014-05-07 16:32:12 +02:00

99 lines
2.3 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 "nsAutoPtr.h"
#include "nsCOMPtr.h"
#include "nsDebug.h"
#include "nsError.h"
#include "nsStreamUtils.h"
namespace mozilla {
namespace dom {
// 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_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)
{
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;
}
} // namespace dom
} // namespace mozilla