/*
 * Libraries and headers for PDC release 3.3 (C) 1989 Lionel Hummel.
 * PDC Software Distribution (C) 1989 Lionel Hummel and Paul Petersen.
 * PDC I/O Library (C) 1987 by J.A. Lydiatt.
 *
 * This code is freely redistributable upon the conditions that this 
 * notice remains intact and that modified versions of this file not
 * be included as part of the PDC Software Distribution without the
 * express consent of the copyright holders.  No warrantee of any
 * kind is provided with this code.  For further information, contact:
 *
 *  PDC Software Distribution    Internet:                     BIX:
 *  P.O. Box 4006             or hummel@cs.uiuc.edu            lhummel
 *  Urbana, IL  61801-8801       petersen@uicsrd.csrd.uiuc.edu
 */

/*  getc.c
 *
 *      Performs single-character buffered I/O
 */

#include <stdio.h>

extern int _filebfill();

int fgetc(fp)
FILE *fp;
{
    if ( fp->_filecpos >= fp->_fileend )
        return _filebfill( fp );
    return (*fp->_filecpos++ & 0xFF);
}


int ungetc(c, fp )
char c;
FILE *fp;
{
    if ( c == EOF || fp->_filecpos <= fp->_filebufp )
        return EOF;

    *--fp->_filecpos = c;
    return (c);
}