ReadStream.cc

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/*
 * ReadStream.cc
 *
 * Smalltalk like class library for C++
 * Internal read stream.
 *
 * Copyright (c) 2003 Milan Cermak
 */
/*
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
#include <stlib/ReadStream.h>
#include <stlib/SequenceableCollection.h>
#include <stlib/String.h>

ReadStream::ReadStream(SequenceableCollection *collection)
  : InternalStream(collection)
{
    /* Does nothing */
}

/* Class-accessing protocol */
String *ReadStream::className(void) const
{
    return new String("ReadStream");
}

/* Accessing protocol */
void ReadStream::flush(void)
{
    shouldNotImplement(new String(__PRETTY_FUNCTION__));
}

Object *ReadStream::next(void)
{
    if (_position >= read_limit) {
        return nil;
    } else
        return collection->at(_position++);
}

void ReadStream::nextPut(Object *object)
{
    shouldNotImplement(new String(__PRETTY_FUNCTION__));
}

long ReadStream::readPosition(void)
{
    return _position;
}

/* Testing protocol */
bool ReadStream::isReadable(void)
{
    return true;
}

bool ReadStream::isWritable(void)
{
    return false;
}

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