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- /*
- * Copyright (c) 1988, 1990 Regents of the University of California.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms are permitted provided
- * that: (1) source distributions retain this entire copyright notice and
- * comment, and (2) distributions including binaries display the following
- * acknowledgement: ``This product includes software developed by the
- * University of California, Berkeley and its contributors'' in the
- * documentation or other materials provided with the distribution and in
- * all advertising materials mentioning features or use of this software.
- * Neither the name of the University nor the names of its contributors may
- * be used to endorse or promote products derived from this software without
- * specific prior written permission.
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
- */
-
- #ifndef lint
- static char sccsid[] = "@(#)terminal.c 5.1 (Berkeley) 9/14/90";
- #endif /* not lint */
-
- #include <arpa/telnet.h>
- #include <sys/types.h>
-
- #include "ring.h"
-
- #include "externs.h"
- #include "types.h"
-
- Ring ttyoring, ttyiring;
- char ttyobuf[2*BUFSIZ], ttyibuf[BUFSIZ];
-
- int termdata; /* Debugging flag */
-
- cc_t termForw2Char;
- cc_t termAytChar;
-
- /*
- * initialize the terminal data structures.
- */
-
- init_terminal()
- {
- if (ring_init(&ttyoring, ttyobuf, sizeof ttyobuf) != 1) {
- exit(1);
- }
- if (ring_init(&ttyiring, ttyibuf, sizeof ttyibuf) != 1) {
- exit(1);
- }
- autoflush = TerminalAutoFlush();
- }
-
-
- /*
- * Send as much data as possible to the terminal.
- *
- * Return value:
- * -1: No useful work done, data waiting to go out.
- * 0: No data was waiting, so nothing was done.
- * 1: All waiting data was written out.
- * n: All data - n was written out.
- */
-
-
- int
- ttyflush(drop)
- int drop;
- {
- register int n, n0, n1;
-
- n0 = ring_full_count(&ttyoring);
- if ((n1 = n = ring_full_consecutive(&ttyoring)) > 0) {
- if (drop) {
- TerminalFlushOutput();
- /* we leave 'n' alone! */
- } else {
- n = TerminalWrite(ttyoring.consume, n);
- }
- }
- if (n > 0) {
- if (termdata && n) {
- Dump('>', ttyoring.consume, n);
- }
- /*
- * If we wrote everything, and the full count is
- * larger than what we wrote, then write the
- * rest of the buffer.
- */
- if (n1 == n && n0 > n) {
- n1 = n0 - n;
- if (!drop)
- n1 = TerminalWrite(ttyoring.bottom, n1);
- n += n1;
- }
- ring_consumed(&ttyoring, n);
- }
- if (n < 0)
- return -1;
- if (n == n0) {
- if (n0)
- return -1;
- return 0;
- }
- return n0 - n + 1;
- }
-
-
- /*
- * These routines decides on what the mode should be (based on the values
- * of various global variables).
- */
-
-
- int
- getconnmode()
- {
- extern int linemode;
- int mode = 0;
-
- if (my_want_state_is_dont(TELOPT_ECHO))
- mode |= MODE_ECHO;
-
- if (localflow)
- mode |= MODE_FLOW;
-
- if (my_want_state_is_will(TELOPT_BINARY))
- mode |= MODE_INBIN;
-
- if (his_want_state_is_will(TELOPT_BINARY))
- mode |= MODE_OUTBIN;
-
- if (my_want_state_is_will(TELOPT_LINEMODE))
- mode |= linemode;
- return(mode);
- }
-
- void
- setconnmode(force)
- {
- TerminalNewMode(getconnmode()|(force?MODE_FORCE:0));
- }
-
-
- void
- setcommandmode()
- {
- TerminalNewMode(-1);
- }
-