/usr/include/thunderbird/mozilla/SnappyCompressOutputStream.h is in thunderbird-dev 1:38.6.0+build1-0ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 | /* -*- 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/. */
#ifndef mozilla_SnappyCompressOutputStream_h__
#define mozilla_SnappyCompressOutputStream_h__
#include "mozilla/Attributes.h"
#include "mozilla/UniquePtr.h"
#include "nsCOMPtr.h"
#include "nsIOutputStream.h"
#include "nsISupportsImpl.h"
#include "SnappyFrameUtils.h"
namespace mozilla {
class SnappyCompressOutputStream final : public nsIOutputStream
, protected detail::SnappyFrameUtils
{
public:
// Maximum compression block size.
static const size_t kMaxBlockSize;
// Construct a new blocking output stream to compress data to
// the given base stream. The base stream must also be blocking.
// The compression block size may optionally be set to a value
// up to kMaxBlockSize.
explicit SnappyCompressOutputStream(nsIOutputStream* aBaseStream,
size_t aBlockSize = kMaxBlockSize);
// The compression block size. To optimize stream performance
// try to write to the stream in segments at least this size.
size_t BlockSize() const;
private:
virtual ~SnappyCompressOutputStream();
nsresult FlushToBaseStream();
nsresult MaybeFlushStreamIdentifier();
nsresult WriteAll(const char* aBuf, uint32_t aCount,
uint32_t* aBytesWrittenOut);
nsCOMPtr<nsIOutputStream> mBaseStream;
const size_t mBlockSize;
// Buffer holding copied uncompressed data. This must be copied here
// so that the compression can be performed on a single flat buffer.
mozilla::UniquePtr<char[]> mBuffer;
// The next byte in the uncompressed data to copy incoming data to.
size_t mNextByte;
// Buffer holding the resulting compressed data.
mozilla::UniquePtr<char[]> mCompressedBuffer;
size_t mCompressedBufferLength;
// The first thing written to the stream must be a stream identifier.
bool mStreamIdentifierWritten;
public:
NS_DECL_THREADSAFE_ISUPPORTS
NS_DECL_NSIOUTPUTSTREAM
};
} // namespace mozilla
#endif // mozilla_SnappyCompressOutputStream_h__
|