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Diffstat (limited to 'lib/common/ReadLoggingStream.cpp')
| -rw-r--r-- | lib/common/ReadLoggingStream.cpp | 245 |
1 files changed, 245 insertions, 0 deletions
diff --git a/lib/common/ReadLoggingStream.cpp b/lib/common/ReadLoggingStream.cpp new file mode 100644 index 00000000..7bf0cc9e --- /dev/null +++ b/lib/common/ReadLoggingStream.cpp @@ -0,0 +1,245 @@ +// distribution boxbackup-0.11rc1 (svn version: 2023_2024) +// +// Copyright (c) 2003 - 2006 +// Ben Summers and contributors. All rights reserved. +// +// Redistribution and use in source and binary forms, with or without +// modification, are permitted provided that the following conditions +// are met: +// 1. Redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer. +// 2. Redistributions in binary form must reproduce the above copyright +// notice, this list of conditions and the following disclaimer in the +// documentation and/or other materials provided with the distribution. +// 3. All use of this software and associated advertising materials must +// display the following acknowledgment: +// This product includes software developed by Ben Summers. +// 4. The names of the Authors may not be used to endorse or promote +// products derived from this software without specific prior written +// permission. +// +// [Where legally impermissible the Authors do not disclaim liability for +// direct physical injury or death caused solely by defects in the software +// unless it is modified by a third party.] +// +// THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR +// IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED +// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE +// DISCLAIMED. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, +// INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES +// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR +// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) +// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, +// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN +// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE +// POSSIBILITY OF SUCH DAMAGE. +// +// +// +// -------------------------------------------------------------------------- +// +// File +// Name: ReadLoggingStream.cpp +// Purpose: Buffering wrapper around IOStreams +// Created: 2007/01/16 +// +// -------------------------------------------------------------------------- + +#include "Box.h" + +#include <string.h> + +#include "ReadLoggingStream.h" +#include "CommonException.h" +#include "Logging.h" + +#include "MemLeakFindOn.h" + +// -------------------------------------------------------------------------- +// +// Function +// Name: ReadLoggingStream::ReadLoggingStream(const char *, int, int) +// Purpose: Constructor, set up buffer +// Created: 2007/01/16 +// +// -------------------------------------------------------------------------- +ReadLoggingStream::ReadLoggingStream(IOStream& rSource) +: mrSource(rSource), + mOffset(0), + mLength(mrSource.BytesLeftToRead()), + mTotalRead(0), + mStartTime(GetCurrentBoxTime()) +{ } + + +// -------------------------------------------------------------------------- +// +// Function +// Name: ReadLoggingStream::Read(void *, int) +// Purpose: Reads bytes from the file +// Created: 2007/01/16 +// +// -------------------------------------------------------------------------- +int ReadLoggingStream::Read(void *pBuffer, int NBytes, int Timeout) +{ + int numBytesRead = mrSource.Read(pBuffer, NBytes, Timeout); + + if (numBytesRead > 0) + { + mTotalRead += numBytesRead; + mOffset += numBytesRead; + } + + if (mLength >= 0 && mTotalRead > 0) + { + box_time_t timeNow = GetCurrentBoxTime(); + box_time_t elapsed = timeNow - mStartTime; + box_time_t finish = (elapsed * mLength) / mTotalRead; + box_time_t remain = finish - elapsed; + + BOX_TRACE("Read " << numBytesRead << " bytes at " << mOffset << + ", " << (mLength - mOffset) << " remain, eta " << + BoxTimeToSeconds(remain) << "s"); + } + else if (mLength >= 0 && mTotalRead == 0) + { + BOX_TRACE("Read " << numBytesRead << " bytes at " << mOffset << + ", " << (mLength - mOffset) << " remain"); + } + else + { + BOX_TRACE("Read " << numBytesRead << " bytes at " << mOffset << + ", unknown bytes remaining"); + } + + return numBytesRead; +} + + +// -------------------------------------------------------------------------- +// +// Function +// Name: ReadLoggingStream::BytesLeftToRead() +// Purpose: Returns number of bytes to read (may not be most efficient function ever) +// Created: 2007/01/16 +// +// -------------------------------------------------------------------------- +IOStream::pos_type ReadLoggingStream::BytesLeftToRead() +{ + return mLength - mOffset; +} + + +// -------------------------------------------------------------------------- +// +// Function +// Name: ReadLoggingStream::Write(void *, int) +// Purpose: Writes bytes to the underlying stream (not supported) +// Created: 2003/07/31 +// +// -------------------------------------------------------------------------- +void ReadLoggingStream::Write(const void *pBuffer, int NBytes) +{ + THROW_EXCEPTION(CommonException, NotSupported); +} + + +// -------------------------------------------------------------------------- +// +// Function +// Name: ReadLoggingStream::GetPosition() +// Purpose: Get position in stream +// Created: 2003/08/21 +// +// -------------------------------------------------------------------------- +IOStream::pos_type ReadLoggingStream::GetPosition() const +{ + return mOffset; +} + + +// -------------------------------------------------------------------------- +// +// Function +// Name: ReadLoggingStream::Seek(pos_type, int) +// Purpose: Seeks within file, as lseek, invalidate buffer +// Created: 2003/07/31 +// +// -------------------------------------------------------------------------- +void ReadLoggingStream::Seek(IOStream::pos_type Offset, int SeekType) +{ + mrSource.Seek(Offset, SeekType); + + switch (SeekType) + { + case SeekType_Absolute: + { + // just go there + mOffset = Offset; + } + break; + + case SeekType_Relative: + { + // Actual underlying file position is + // (mBufferSize - mBufferPosition) ahead of us. + // Need to subtract that amount from the seek + // to seek forward that much less, putting the + // real pointer in the right place. + mOffset += Offset; + } + break; + + case SeekType_End: + { + // Actual underlying file position is + // (mBufferSize - mBufferPosition) ahead of us. + // Need to add that amount to the seek + // to seek backwards that much more, putting the + // real pointer in the right place. + mOffset = mLength - Offset; + } + } +} + + +// -------------------------------------------------------------------------- +// +// Function +// Name: ReadLoggingStream::Close() +// Purpose: Closes the underlying stream (not needed) +// Created: 2003/07/31 +// +// -------------------------------------------------------------------------- +void ReadLoggingStream::Close() +{ + THROW_EXCEPTION(CommonException, NotSupported); +} + + +// -------------------------------------------------------------------------- +// +// Function +// Name: ReadLoggingStream::StreamDataLeft() +// Purpose: Any data left to write? +// Created: 2003/08/02 +// +// -------------------------------------------------------------------------- +bool ReadLoggingStream::StreamDataLeft() +{ + return mrSource.StreamDataLeft(); +} + +// -------------------------------------------------------------------------- +// +// Function +// Name: ReadLoggingStream::StreamClosed() +// Purpose: Is the stream closed? +// Created: 2003/08/02 +// +// -------------------------------------------------------------------------- +bool ReadLoggingStream::StreamClosed() +{ + return mrSource.StreamClosed(); +} + |