| 1 | /* |
| 2 | * Copyright (c) 1980 Regents of the University of California. |
| 3 | * All rights reserved. The Berkeley software License Agreement |
| 4 | * specifies the terms and conditions for redistribution. |
| 5 | */ |
| 6 | |
| 7 | #ifndef lint |
| 8 | static char sccsid[] = "@(#)outchar.c 5.1 (Berkeley) %G%"; |
| 9 | #endif not lint |
| 10 | |
| 11 | #include "2648.h" |
| 12 | |
| 13 | outchar(c) |
| 14 | char c; |
| 15 | { |
| 16 | extern int QUIET; |
| 17 | #ifdef TRACE |
| 18 | if (trace) |
| 19 | fprintf(trace, "%s", rdchar(c)); |
| 20 | #endif |
| 21 | if (QUIET) |
| 22 | return; |
| 23 | _outcount++; |
| 24 | putchar(c); |
| 25 | |
| 26 | /* Do 2648 ^E/^F handshake */ |
| 27 | if (_outcount > TBLKSIZ && _on2648) { |
| 28 | #ifdef TRACE |
| 29 | if (trace) |
| 30 | fprintf(trace, "ENQ .. "); |
| 31 | #endif |
| 32 | putchar(ENQ); |
| 33 | fflush(stdout); |
| 34 | c = getchar(); |
| 35 | while (c != ACK) { |
| 36 | if (_pb_front == NULL) { |
| 37 | _pb_front = _pushback; |
| 38 | _pb_back = _pb_front - 1; |
| 39 | } |
| 40 | *++_pb_back = c; |
| 41 | #ifdef TRACE |
| 42 | if (trace) |
| 43 | fprintf(trace, "push back %s, front=%d, back=%d, ", rdchar(c), _pb_front-_pushback, _pb_front-_pushback); |
| 44 | #endif |
| 45 | c = getchar(); |
| 46 | } |
| 47 | #ifdef TRACE |
| 48 | if (trace) |
| 49 | fprintf(trace, "ACK\n"); |
| 50 | #endif |
| 51 | _outcount = 0; |
| 52 | } |
| 53 | } |