The Simons     Component Library

           

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Stream.h

//
//  SCL : Simons Component Library
//
//
//  Filename:   Stream.h
//  Contents:   Stream class
//  Author:     Anthony J H Simons
//  Revised:    2 November 2005

// This software is distributed free in the hope that others will
// find it useful.  However, it comes WITHOUT ANY WARRANTY.  No
// liability can be accepted for software failure, merchantability
// or fitness for a particular purpose.  You can redistribute this
// software in its original form, or in a modified form, provided
// that this disclaimer is retained in the file banner.

#ifndef SCL_STREAM
#define SCL_STREAM

#include "Object.h"             // Include my superclass type
#include "StreamID.h"           // Include my pointer type

#include "StringID.h"           // Depend on the pointer type


class Stream : public Object {
protected:
        Void readFailure(StringID, ObjectID) const;
        Void writeFailure(StringID, ObjectID) const;
        Stream(const Stream&);
public:
        Stream();
        virtual ~Stream();
        virtual Void openOn(StringID);
        virtual Void open();
        virtual Void close();
        virtual StringID name() const;
        virtual Boolean exists() const;
        virtual Boolean empty() const;
        virtual Boolean ready() const;
        virtual Boolean failed() const;
        virtual Boolean source() const;
        virtual Boolean sink() const;
};


inline StreamID::StreamID() {}

inline StreamID::~StreamID() {}

inline StreamID::StreamID(const Null* null) :
        ObjectID(null) {}
        
inline StreamID::StreamID(const Stream* stream) :
        ObjectID(stream) {}
        
inline StreamID::StreamID(const StreamID& pointer) :
        ObjectID(pointer) {}
        
inline StreamID& StreamID::operator=(const Stream* stream) {
        assign(stream);
        return *this;
}

inline StreamID& StreamID::operator=(const StreamID& pointer) {
        assign(pointer);
        return *this;
}


#endif

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