#ifndef __STDIOSTREAM_H
#define __STDIOSTREAM_H

/*-------------------------------------------------------------------*/
/* Copyright (c) 1993-1996        by SAS Institute Inc., Cary NC     */
/*                                                                   */
/* NAME:       stdiostream.h                                         */
/* AUTHOR:     Gavin Koch - IBM 370 C Compiler department            */
/* DATE:                                                             */
/* SUPPORT:    sasgak - IBM 370 C Compiler department                */
/* PRODUCT:    C++ Library                                           */
/* LANGUAGE:   C++                                                   */
/* MACHINE:    all                                                   */
/* PURPOSE:                                                          */
/*                                                                   */
/* HISTORY:    action                                   date   name  */
/*             spilt iobase.h out of iostream.h       96/03/27  gak  */
/*             Added __alignmem to each class def.    94/03/16  led  */
/*             Added #ifndef's around each #include   93/07/02  hlc  */
/*             Added this description header.         93/03/18  gww  */
/*             Changed __alignmem to #define          94/10/04  gak  */
/* NOTES:                                                            */
/* ALGORITHM:                                                        */
/* END                                                               */
/*-------------------------------------------------------------------*/
#ifndef _STDDEFH
#include <stddef.h>
#endif

#ifndef __IOBASE_H
#include <iobase.h>
#endif

/********

class stdiobuf
    stdiobufs are a simple interface to FILE*.
    stdiobufs will probably not be part of ANSI C++.

    Calls to a stdiobuf are mapped directly to calls to
    ANSI C stdio functions.

********/

/* All include's for this file must happen before here. */

#ifdef __I370__
#define __SASCXXLIB_CLASS_DEF_KEYS __alignmem
#else
#define __SASCXXLIB_CLASS_DEF_KEYS 
#endif 

__SASCXXLIB_CLASS_DEF_KEYS class stdiobuf : public streambuf {
    public:

           // Attach to a FILE*.
      stdiobuf( FILE* _file ) : x_file( _file ) {}

           // disconnect
      virtual ~stdiobuf() {}

          // Return the attached FILE*.
      FILE* stdiofile() { return x_file; }

           // Override or replace from streambuf.
      virtual int        overflow(int=EOF);
      virtual int        underflow();
      virtual int        sync();
      virtual int xsputn(const char* s,int n);
      virtual int xsgetn(char*  s,int n);
      virtual streampos seekoff(streamoff offset, ios::seek_dir dir,
                        int mode);
      virtual streampos seekpos(streampos, int =ios::in|ios::out);
      virtual int pbackfail(int c);
      virtual streambuf* setbuf(char* p, size_t len);

    private:
        FILE* x_file;
        char  _buf[2];      // buffer for i/o
    };



__SASCXXLIB_CLASS_DEF_KEYS class stdiostream : public iostream {

    public:

           // Attach to a FILE*.
      stdiostream( FILE* _file )
          : ios( &buffer ), buffer( _file )
          {
          }

      stdiobuf* rdbuf() { return &buffer; }

    private:
      stdiobuf buffer;
    };

#undef __SASCXXLIB_CLASS_DEF_KEYS

#endif  /* __STDIOSTREAM_H */