usr/src/old/lib2648/outchar.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[] = "@(#)outchar.c   5.1 (Berkeley) %G%";
#endif not lint

#include "2648.h"

outchar(c)
char c;
{
        extern int QUIET;
#ifdef TRACE
        if (trace)
                fprintf(trace, "%s", rdchar(c));
#endif
        if (QUIET)
                return;
        _outcount++;
        putchar(c);

        /* Do 2648 ^E/^F handshake */
        if (_outcount > TBLKSIZ && _on2648) {
#ifdef TRACE
                if (trace)
                        fprintf(trace, "ENQ .. ");
#endif
                putchar(ENQ);
                fflush(stdout);
                c = getchar();
                while (c != ACK) {
                        if (_pb_front == NULL) {
                                _pb_front = _pushback;
                                _pb_back = _pb_front - 1;
                        }
                        *++_pb_back = c;
#ifdef TRACE
                        if (trace)
                                fprintf(trace, "push back %s, front=%d, back=%d, ", rdchar(c), _pb_front-_pushback, _pb_front-_pushback);
#endif
                        c = getchar();
                }
#ifdef TRACE
                if (trace)
                        fprintf(trace, "ACK\n");
#endif
                _outcount = 0;
        }
}