binary_i_socket.cpp

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/** @file
 *  @author Bram de Greve (bram@cocamware.com)
 *  @author Tom De Muer (tom@cocamware.com)
 *
 *  *** BEGIN LICENSE INFORMATION ***
 *  
 *  The contents of this file are subject to the Common Public Attribution License 
 *  Version 1.0 (the "License"); you may not use this file except in compliance with 
 *  the License. You may obtain a copy of the License at 
 *  http://lass.sourceforge.net/cpal-license. The License is based on the 
 *  Mozilla Public License Version 1.1 but Sections 14 and 15 have been added to cover 
 *  use of software over a computer network and provide for limited attribution for 
 *  the Original Developer. In addition, Exhibit A has been modified to be consistent 
 *  with Exhibit B.
 *  
 *  Software distributed under the License is distributed on an "AS IS" basis, WITHOUT 
 *  WARRANTY OF ANY KIND, either express or implied. See the License for the specific 
 *  language governing rights and limitations under the License.
 *  
 *  The Original Code is LASS - Library of Assembled Shared Sources.
 *  
 *  The Initial Developer of the Original Code is Bram de Greve and Tom De Muer.
 *  The Original Developer is the Initial Developer.
 *  
 *  All portions of the code written by the Initial Developer are:
 *  Copyright (C) 2004-2024 the Initial Developer.
 *  All Rights Reserved.
 *  
 *  Contributor(s):
 *
 *  Alternatively, the contents of this file may be used under the terms of the 
 *  GNU General Public License Version 2 or later (the GPL), in which case the 
 *  provisions of GPL are applicable instead of those above.  If you wish to allow use
 *  of your version of this file only under the terms of the GPL and not to allow 
 *  others to use your version of this file under the CPAL, indicate your decision by 
 *  deleting the provisions above and replace them with the notice and other 
 *  provisions required by the GPL License. If you do not delete the provisions above,
 *  a recipient may use your version of this file under either the CPAL or the GPL.
 *  
 *  *** END LICENSE INFORMATION ***
 */
 
#include "lass_common.h"
#include "binary_i_socket.h"
#include "socket.h"
 
namespace lass
{
namespace io
{
 
BinaryISocket::BinaryISocket():
    BinaryIStream(),
    socket_(0)
{
}
 
 
 
/**
 *  @param socket [in] BinaryISocket does _not_ take ownership of socket, and it must be alive as long as BinaryISocket needs it 
 *      (until BinaryISocket goes out of scope, or another socket is installed).
 */
BinaryISocket::BinaryISocket(Socket* socket):
    BinaryIStream(),
    socket_(socket)
{
}
 
 
 
Socket* BinaryISocket::socket() const
{
    return socket_;
}
 
 
 
/**
 *  @param socket [in] BinaryISocket does _not_ take ownership of socket, and it must be alive as long as BinaryISocket needs it 
 *      (until BinaryISocket goes out of scope, or another socket is installed).
 */
void BinaryISocket::setSocket(Socket* socket)
{
    socket_ = socket;
    setstate(std::ios_base::goodbit);
}
 
 
 
// --- private -------------------------------------------------------------------------------------
 
size_t BinaryISocket::doRead(void* oBegin, size_t iNumberOfBytes)
{
    if (!good())
    {
        return 0;
    }
    if (!socket_)
    {
        setstate(std::ios_base::failbit);
        return 0;
    }
    char* begin = static_cast<char*>(oBegin);
    int numberOfBytes = static_cast<int>(iNumberOfBytes);
    LASS_ASSERT(numberOfBytes >= 0 && static_cast<size_t>(numberOfBytes) == iNumberOfBytes);
    size_t bytesRead = 0;
    while (numberOfBytes > 0)
    {
        try
        {
            const int read = socket_->receive(begin, numberOfBytes);
            if (read == 0)
            {
                setstate(std::ios_base::eofbit);
                return 0;
            }
            LASS_ASSERT(read >= 0 && read <= numberOfBytes);
            begin += read;
            bytesRead += static_cast<size_t>(read);
            numberOfBytes -= read;
        }
        catch (const util::Exception&)
        {
            setstate(std::ios_base::badbit);
            return bytesRead;
        }
    }
    return bytesRead;
}
 
 
 
BinaryISocket::pos_type BinaryISocket::doTellg() const
{
    LASS_THROW("no position in network streams!");
    // return 0;
}
 
 
 
void BinaryISocket::doSeekg(pos_type)
{
    LASS_THROW("no seeking in network streams!");
}
 
 
 
void BinaryISocket::doSeekg(off_type, std::ios_base::seekdir)
{
    LASS_THROW("no seeking in network streams!");
}
 
 
}
 
}