usr/src/old/lib2648/rawchar.c

/*
 * Copyright (c) 1980 Regents of the University of California.
 * All rights reserved.  The Berkeley software License Agreement
 * specifies the terms and conditions for redistribution.
 */

#ifndef lint
static char sccsid[] = "@(#)rawchar.c   5.1 (Berkeley) %G%";
#endif not lint

/*
 * get a character from the terminal, with no line buffering.
 */

#include "2648.h"

rawchar()
{
        char c;

        sync();
        escseq(NONE);
        fflush(stdout);
        if (_pb_front && _on2648) {
                c = *_pb_front++;
#ifdef TRACE
                if (trace)
                        fprintf(trace, "%s from queue, front=%d, back=%d\n", rdchar(c), _pb_front-_pushback, _pb_back-_pushback);
#endif
                if (_pb_front > _pb_back) {
                        _pb_front = _pb_back = NULL;
#ifdef TRACE
                        if (trace)
                                fprintf(trace, "reset pushback to null\n");
#endif
                }
                return (c);
        }
        _outcount = 0;
        c = getchar();
#ifdef TRACE
        if (trace)
                fprintf(trace, "rawchar '%s'\n", rdchar(c));
#endif
        return (c);
}