IOIFCStreamBuffer.cpp

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00001 /*******************************************************************************
00002 * Copyright (C) 2004 Vintela, Inc. All rights reserved.
00003 * Copyright (C) 2005 Novell, Inc. All rights reserved.
00004 *
00005 * Redistribution and use in source and binary forms, with or without
00006 * modification, are permitted provided that the following conditions are met:
00007 *
00008 *  - Redistributions of source code must retain the above copyright notice,
00009 *    this list of conditions and the following disclaimer.
00010 *
00011 *  - Redistributions in binary form must reproduce the above copyright notice,
00012 *    this list of conditions and the following disclaimer in the documentation
00013 *    and/or other materials provided with the distribution.
00014 *
00015 *  - Neither the name of Vintela, Inc., Novell, Inc., nor the names of its
00016 *    contributors may be used to endorse or promote products derived from this
00017 *    software without specific prior written permission.
00018 *
00019 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
00020 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
00021 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
00022 * ARE DISCLAIMED. IN NO EVENT SHALL Vintela, Inc., Novell, Inc., OR THE 
00023 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
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00025 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 
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00031 
00032 
00038 #include "blocxx/BLOCXX_config.h"
00039 #include "blocxx/IOIFCStreamBuffer.hpp"
00040 
00041 namespace BLOCXX_NAMESPACE
00042 {
00043 
00045 IOIFCStreamBuffer::IOIFCStreamBuffer(IOIFC* dev, int bufSize,
00046    const char* direction)
00047    : BaseStreamBuffer(bufSize, direction)
00048    , m_dev(dev)
00049 {
00050 }
00052 IOIFCStreamBuffer::~IOIFCStreamBuffer()
00053 {
00054    sync();
00055 }
00057 int
00058 IOIFCStreamBuffer::buffer_from_device(char* c, int n)
00059 {
00060    return m_dev->read(c,n);
00061 }
00063 int
00064 IOIFCStreamBuffer::buffer_to_device(const char* c, int n)
00065 {
00066    while (n > 0)
00067    {
00068       int cnt = m_dev->write(c, n);
00069       if (cnt == -1) // failure
00070       {
00071          return -1;
00072       }
00073       c += cnt;
00074       n -= cnt;
00075    }
00076    return 0;
00077 }
00078 
00080 void
00081 IOIFCStreamBuffer::reset()
00082 { 
00083    initBuffers(); 
00084 }
00085 
00086 } // end namespace BLOCXX_NAMESPACE
00087 

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