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101 lines
2.7 KiB
C++
101 lines
2.7 KiB
C++
//
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// AsyncStreamChannel.cpp
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//
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// $Id: //poco/svn/Foundation/src/AsyncStreamChannel.cpp#2 $
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//
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// Library: Foundation
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// Package: AsyncIO
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// Module: AsyncStreamChannel
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//
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// Copyright (c) 2007, Applied Informatics Software Engineering GmbH.
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// and Contributors.
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//
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// Permission is hereby granted, free of charge, to any person or organization
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// obtaining a copy of the software and accompanying documentation covered by
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// this license (the "Software") to use, reproduce, display, distribute,
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// execute, and transmit the Software, and to prepare derivative works of the
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// Software, and to permit third-parties to whom the Software is furnished to
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// do so, all subject to the following:
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//
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// The copyright notices in the Software and this entire statement, including
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// the above license grant, this restriction and the following disclaimer,
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// must be included in all copies of the Software, in whole or in part, and
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// all derivative works of the Software, unless such copies or derivative
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// works are solely in the form of machine-executable object code generated by
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// a source language processor.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
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// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
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// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
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// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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//
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#include "Poco/AsyncStreamChannel.h"
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#include "Poco/Exception.h"
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namespace Poco {
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AsyncStreamChannel::AsyncStreamChannel(std::istream& istr):
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_pIstr(&istr),
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_pOstr(0)
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{
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}
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AsyncStreamChannel::AsyncStreamChannel(std::ostream& ostr):
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_pIstr(0),
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_pOstr(&ostr)
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{
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}
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AsyncStreamChannel::AsyncStreamChannel(std::iostream& iostr):
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_pIstr(&iostr),
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_pOstr(&iostr)
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{
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}
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AsyncStreamChannel::~AsyncStreamChannel()
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{
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}
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int AsyncStreamChannel::write(const void* buffer, int length)
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{
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if (_pOstr)
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{
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_pOstr->write(reinterpret_cast<const char*>(buffer), length);
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return length;
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}
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else throw IOException("Cannot write to an input stream");
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}
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int AsyncStreamChannel::read(void* buffer, int length)
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{
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if (_pIstr)
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return static_cast<int>(_pIstr->read(reinterpret_cast<char*>(buffer), length).gcount());
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else
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throw IOException("Cannot read from an output stream");
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}
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int AsyncStreamChannel::seek(std::streamoff off, std::ios::seekdir dir)
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{
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if (_pIstr)
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_pIstr->seekg(off, dir);
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if (_pOstr)
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_pOstr->seekp(off, dir);
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return 0;
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}
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} // namespace Poco
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