Emilio Cobos Álvarez
2223a8bee2
Automatically generated with:
cp dom/.clang-format xpcom/ && mach format xpcom/**.{cpp,h}
Manual changes:
* nsTDependentSubstring.cpp was relying on include order, prevent that
from being changed by clang-format.
* Missing nsAtom.h include from nsGkAtoms.h
* nsWindowsHelpers.h needed to keep the include order
* MemoryPressureLevelMac.h needed mozilla/Attributes.h
Differential Revision: https://phabricator.services.mozilla.com/D311687
66 lines
2.1 KiB
C++
66 lines
2.1 KiB
C++
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_SnappyCompressOutputStream_h_
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#define mozilla_SnappyCompressOutputStream_h_
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#include "SnappyFrameUtils.h"
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#include "mozilla/UniquePtr.h"
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#include "nsCOMPtr.h"
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#include "nsIOutputStream.h"
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#include "nsISupportsImpl.h"
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namespace mozilla {
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class SnappyCompressOutputStream final : public nsIOutputStream,
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protected detail::SnappyFrameUtils {
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public:
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// Maximum compression block size.
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static const size_t kMaxBlockSize;
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// Construct a new blocking output stream to compress data to
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// the given base stream. The base stream must also be blocking.
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// The compression block size may optionally be set to a value
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// up to kMaxBlockSize.
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explicit SnappyCompressOutputStream(nsIOutputStream* aBaseStream,
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size_t aBlockSize = kMaxBlockSize);
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// The compression block size. To optimize stream performance
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// try to write to the stream in segments at least this size.
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size_t BlockSize() const;
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private:
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virtual ~SnappyCompressOutputStream();
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nsresult FlushToBaseStream();
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nsresult MaybeFlushStreamIdentifier();
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nsresult WriteAll(const char* aBuf, uint32_t aCount,
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uint32_t* aBytesWrittenOut);
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nsCOMPtr<nsIOutputStream> mBaseStream;
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const size_t mBlockSize;
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// Buffer holding copied uncompressed data. This must be copied here
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// so that the compression can be performed on a single flat buffer.
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mozilla::UniquePtr<char[]> mBuffer;
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// The next byte in the uncompressed data to copy incoming data to.
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size_t mNextByte;
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// Buffer holding the resulting compressed data.
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mozilla::UniquePtr<char[]> mCompressedBuffer;
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size_t mCompressedBufferLength;
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// The first thing written to the stream must be a stream identifier.
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bool mStreamIdentifierWritten;
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public:
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NS_DECL_THREADSAFE_ISUPPORTS
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NS_DECL_NSIOUTPUTSTREAM
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};
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} // namespace mozilla
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#endif // mozilla_SnappyCompressOutputStream_h_
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