The Simons     Component Library

           

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Input.h

//
//  SCL : Simons Component Library
//
//
//  Filename:   Input.h
//  Contents:   Input class
//  Author:     Anthony J H Simons
//  Revised:    6 December 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_INPUT
#define SCL_INPUT

#include "FileStream.h"         // Include my superclass type
#include "InputID.h"            // Include my pointer type

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

#include <iosfwd>               // In ANSI standard C++; cannot forward
                                // declare 'class istream;' because it is a
                                // 'typedef basic_istream<char> istream;'


class Input : public FileStream {
private:
        static std::istream closed;     
protected:
        std::istream* filesystem;       
        Input(const Input&);
public:
        Input();
        virtual ~Input();
        Input(StringID);
        virtual Void open();
        virtual Void close();
        virtual Boolean exists() const;
        virtual Boolean empty() const;
        virtual Boolean ready() const;
        virtual Boolean failed() const;
        virtual Boolean source() const;
        virtual InputID get(Boolean&);
        virtual InputID get(Character&);
        virtual InputID get(Natural&);
        virtual InputID get(Integer&);
        virtual InputID get(Decimal&);
        virtual InputID get(StringID&, Character = '\n');
        virtual InputID get(Character[], Natural, Character = '\n');
        virtual InputID skip(Character = '\n');         
};


inline InputID::InputID() {}

inline InputID::~InputID() {}

inline InputID::InputID(const Null* null) :
        FileStreamID(null) {}
        
inline InputID::InputID(const Input* stream) :
        FileStreamID(stream) {}
        
inline InputID::InputID(const InputID& pointer) :
        FileStreamID(pointer) {}
        
inline InputID& InputID::operator=(const Input* stream) {
        assign(stream);
        return *this;
}

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

#endif

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