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- /* TTY input driver */
- #include <stdio.h>
- #include <ctype.h>
- #include "config.h"
-
- #define NULLCHAR (char *)0;
- int ttymode;
- #define TTY_LIT 0 /* Send next char literally */
- #define TTY_RAW 1
- #define TTY_COOKED 2
-
- int ttyecho=1;
- #define TTY_NOECHO 0
- #define TTY_ECHO 1
-
- #ifdef FLOW
- int ttyflow=1;
- #endif
-
- #define LINESIZE 256
-
- #define CTLR 18
- #define CTLU 21
- #define CTLV 22
- #define CTLW 23
- #define CTLZ 26
- #define RUBOUT 127
-
- raw()
- {
- ttymode = TTY_RAW;
- #ifdef ATARI_ST
- set_stdout(ttymode); /* CR/LF vs LF madness... -- hyc */
- #endif
- }
-
- cooked()
- {
- ttymode = TTY_COOKED;
- #ifdef ATARI_ST
- set_stdout(ttymode);
- #endif
- }
-
- void
- echo()
- {
- ttyecho = TTY_ECHO;
- }
-
- void
- noecho()
- {
- ttyecho = TTY_NOECHO;
- }
-
- /* Accept characters from the incoming tty buffer and process them
- * (if in cooked mode) or just pass them directly (if in raw mode).
- * Returns the number of characters available for use; if non-zero,
- * also stashes a pointer to the character(s) in the "buf" argument.
- */
- /*Control-R added by df for retype of lines - useful in Telnet */
- /*Then df got impatient and added Control-W for erasing words */
- /* Control-V for the literal-next function, slightly improved
- * flow control, local echo stuff -- hyc */
- int
- ttydriv(c,buf)
- char c;
- char **buf;
- {
- static char linebuf[LINESIZE];
- static char *cp = linebuf;
- char *rp ;
- int cnt;
- int seenprint;
-
- if(buf == (char **)NULL)
- return 0; /* paranoia check */
-
- cnt = 0;
- switch(ttymode){
- case TTY_LIT:
- ttymode = TTY_COOKED; /* Reset to cooked mode */
- case TTY_RAW:
- *cp++ = c;
- cnt = cp - linebuf;
- cp = linebuf;
- break;
- case TTY_COOKED:
- /* Perform cooked-mode line editing */
- #ifdef PC9801
- switch(c){
- #else
- switch(c & 0x7f){
- #endif
- case '\r': /* CR and LF are equivalent */
- case '\n':
- *cp++ = '\r';
- *cp++ = '\n';
- printf("\n");
- cnt = cp - linebuf;
- cp = linebuf;
- break;
- case RUBOUT:
- case '\b': /* Backspace */
- if(cp != linebuf){
- cp--;
- if (ttyecho)
- printf("\b \b");
- }
- break;
- case CTLR: /* print line buffer */
- if(ttyecho)
- printf("^R");
- printf("\n");
- if(ttyecho) {
- rp = linebuf ;
- while (rp < cp)
- putchar(*rp++) ;
- }
- break ;
- case CTLU: /* Line kill */
- if(ttyecho) {
- while(cp != linebuf){
- cp--;
- printf("\b \b");
- }
- } else
- cp = linebuf;
- break;
- case CTLV:
- ttymode = TTY_LIT;
- break;
- case CTLW: /* erase word */
- seenprint = 0 ; /* we haven't seen a printable char yet */
- while (cp != linebuf) {
- cp--;
- if(ttyecho)
- printf("\b \b") ;
- if (isspace(*cp)) {
- if (seenprint)
- break ;
- }
- else
- seenprint = 1 ;
- }
- break ;
- default: /* Ordinary character */
- *cp++ = c;
- #ifndef AMIGA
- /* ^Z apparently hangs the terminal emulators under
- * DoubleDos and Desqview. I REALLY HATE having to patch
- * around other people's bugslike this!!!
- */
- if (ttyecho && (c != CTLZ))
- putchar(c);
- #endif
- if(cp >= &linebuf[LINESIZE]){
- cnt = cp - linebuf;
- cp = linebuf;
- }
- break;
- }
- }
- if(cnt > 0)
- *buf = linebuf;
- else
- *buf = NULLCHAR;
- #ifdef FLOW
- if(cp > linebuf)
- ttyflow = 0;
- else
- ttyflow = 1;
- #endif
- fflush(stdout);
- return cnt;
- }
-