mirror of
https://github.com/Icinga/icinga2.git
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100 lines
3.2 KiB
C++
100 lines
3.2 KiB
C++
/******************************************************************************
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* Icinga 2 *
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* Copyright (C) 2012 Icinga Development Team (http://www.icinga.org/) *
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* *
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* This program is free software; you can redistribute it and/or *
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* modify it under the terms of the GNU General Public License *
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* as published by the Free Software Foundation; either version 2 *
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* of the License, or (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the Free Software Foundation *
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. *
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******************************************************************************/
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#include "i2-base.h"
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using namespace icinga;
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/**
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* Constructor for the StdioStream class.
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*
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* @param innerStream The inner stream.
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* @param ownsStream Whether the new object owns the inner stream. If true
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* the stream's destructor deletes the inner stream.
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*/
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StdioStream::StdioStream(iostream *innerStream, bool ownsStream)
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: m_InnerStream(innerStream), m_OwnsStream(ownsStream),
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m_ReadAheadBuffer(boost::make_shared<FIFO>())
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{
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m_ReadAheadBuffer->Start();
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}
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/**
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* Destructor for the StdioStream class.
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*/
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StdioStream::~StdioStream(void)
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{
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m_ReadAheadBuffer->Close();
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}
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void StdioStream::Start(void)
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{
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SetConnected(true);
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Stream::Start();
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}
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size_t StdioStream::GetAvailableBytes(void) const
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{
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if (m_InnerStream->eof() && m_ReadAheadBuffer->GetAvailableBytes() == 0)
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return 0;
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else
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return 1024; /* doesn't have to be accurate */
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}
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size_t StdioStream::Read(void *buffer, size_t size)
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{
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size_t peek_len, read_len;
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peek_len = m_ReadAheadBuffer->GetAvailableBytes();
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peek_len = m_ReadAheadBuffer->Read(buffer, peek_len);
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m_InnerStream->read(static_cast<char *>(buffer) + peek_len, size - peek_len);
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read_len = m_InnerStream->gcount();
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return peek_len + read_len;
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}
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size_t StdioStream::Peek(void *buffer, size_t size)
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{
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size_t peek_len, read_len;
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peek_len = m_ReadAheadBuffer->GetAvailableBytes();
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peek_len = m_ReadAheadBuffer->Peek(buffer, peek_len);
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m_InnerStream->read(static_cast<char *>(buffer) + peek_len, size - peek_len);
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read_len = m_InnerStream->gcount();
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m_ReadAheadBuffer->Write(static_cast<char *>(buffer) + peek_len, read_len);
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return peek_len + read_len;
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}
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void StdioStream::Write(const void *buffer, size_t size)
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{
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m_InnerStream->write(static_cast<const char *>(buffer), size);
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}
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void StdioStream::Close(void)
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{
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if (m_OwnsStream)
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delete m_InnerStream;
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Stream::Close();
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}
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