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- /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
- /* tty.c - version 1.0.3 */
- /* With thanks to the people who sent code for SYSV - hpscdi!jon,
- arnold@ucsf-cgl, wcs@bo95b, cbcephus!pds and others. */
-
- #include <stdio.h>
- #include "hack.h"
-
- #ifndef MSDOS
- #define MSDOS
- #endif
- #ifdef MSDOS
- static char erase_char, kill_char;
- static boolean settty_needed = FALSE;
- #else MSDOS
- /*
- * The distinctions here are not BSD - rest but rather USG - rest, as
- * BSD still has the old sgttyb structure, but SYSV has termio. Thus:
- */
- #ifdef BSD
- #define V7
- #else
- #define USG
- #endif BSD
-
- /*
- * Some systems may have getchar() return EOF for various reasons, and
- * we should not quit before seeing at least NR_OF_EOFS consecutive EOFs.
- */
- #ifndef BSD
- #define NR_OF_EOFS 20
- #endif BSD
-
-
- #ifdef USG
-
- #include <termio.h>
- #define termstruct termio
- #define kill_sym c_cc[VKILL]
- #define erase_sym c_cc[VERASE]
- #define EXTABS TAB3
- #define tabflgs c_oflag
- #define echoflgs c_lflag
- #define cbrkflgs c_lflag
- #define CBRKMASK ICANON
- #define CBRKON ! /* reverse condition */
- #define OSPEED(x) ((x).c_cflag & CBAUD)
- #define GTTY(x) (ioctl(0, TCGETA, x))
- #define STTY(x) (ioctl(0, TCSETA, x)) /* TCSETAF? TCSETAW? */
-
- #else /* V7 */
-
- #include <sgtty.h>
- #define termstruct sgttyb
- #define kill_sym sg_kill
- #define erase_sym sg_erase
- #define EXTABS XTABS
- #define tabflgs sg_flags
- #define echoflgs sg_flags
- #define cbrkflgs sg_flags
- #define CBRKMASK CBREAK
- #define CBRKON /* empty */
- #define OSPEED(x) (x).sg_ospeed
- #define GTTY(x) (gtty(0, x))
- #define STTY(x) (stty(0, x))
-
- #endif USG
-
- extern short ospeed;
- static char erase_char, kill_char;
- static boolean settty_needed = FALSE;
- struct termstruct inittyb, curttyb;
- #endif MSDOS
-
- /*
- * Get initial state of terminal, set ospeed (for termcap routines)
- * and switch off tab expansion if necessary.
- * Called by startup() in termcap.c and after returning from ! or ^Z
- */
- gettty(){
- #ifdef MSDOS
- erase_char = '\b';
- kill_char = 21; /* cntl-U */
- #else
- if(GTTY(&inittyb) < 0)
- perror("Hack (gettty)");
- curttyb = inittyb;
- ospeed = OSPEED(inittyb);
- erase_char = inittyb.erase_sym;
- kill_char = inittyb.kill_sym;
- getioctls();
-
- /* do not expand tabs - they might be needed inside a cm sequence */
- if(curttyb.tabflgs & EXTABS) {
- curttyb.tabflgs &= ~EXTABS;
- setctty();
- }
- #endif MSDOS
- settty_needed = TRUE;
- }
-
- /* reset terminal to original state */
- settty(s) char *s; {
- end_screen();
- clear_screen();
- if(s) printf(s);
- (void) fflush(stdout);
- #ifdef MSDOS
- flags.echo = ON;
- flags.cbreak = OFF;
- #else
- if(STTY(&inittyb) < 0)
- perror("Hack (settty)");
- flags.echo = (inittyb.echoflgs & ECHO) ? ON : OFF;
- flags.cbreak = (CBRKON(inittyb.cbrkflgs & CBRKMASK)) ? ON : OFF;
- setioctls();
- #endif MSDOS
- }
-
- setctty(){
- #ifndef MSDOS
- if(STTY(&curttyb) < 0)
- perror("Hack (setctty)");
- #endif MSDOS
- }
-
-
- setftty(){
- #ifdef MSDOS
- flags.cbreak = ON;
- flags.echo = OFF;
- #else
- register int ef = 0; /* desired value of flags & ECHO */
- register int cf = CBRKON(CBRKMASK); /* desired value of flags & CBREAK */
- register int change = 0;
- flags.cbreak = ON;
- flags.echo = OFF;
- /* Should use (ECHO|CRMOD) here instead of ECHO */
- if((curttyb.echoflgs & ECHO) != ef){
- curttyb.echoflgs &= ~ECHO;
- /* curttyb.echoflgs |= ef; */
- change++;
- }
- if((curttyb.cbrkflgs & CBRKMASK) != cf){
- curttyb.cbrkflgs &= ~CBRKMASK;
- curttyb.cbrkflgs |= cf;
- #ifdef USG
- /* be satisfied with one character; no timeout */
- curttyb.c_cc[VMIN] = 1; /* was VEOF */
- curttyb.c_cc[VTIME] = 0; /* was VEOL */
- #endif USG
- change++;
- }
- if(change){
- setctty();
- }
- #endif MSDOS
- start_screen();
- }
-
-
- /* fatal error */
- /*VARARGS1*/
- error(s,x,y) char *s; {
- if(settty_needed)
- settty((char *) 0);
- printf(s,x,y);
- putchar('\n');
- exit(1);
- }
-
- /*
- * Read a line closed with '\n' into the array char bufp[BUFSZ].
- * (The '\n' is not stored. The string is closed with a '\0'.)
- * Reading can be interrupted by an escape ('\033') - now the
- * resulting string is "\033".
- */
- getlin(bufp)
- register char *bufp;
- {
- register char *obufp = bufp;
- register int c;
-
- flags.toplin = 2; /* nonempty, no --More-- required */
- for(;;) {
- (void) fflush(stdout);
- if((c = getchar()) == EOF) {
- *bufp = 0;
- return;
- }
- if(c == '\033') {
- *obufp = c;
- obufp[1] = 0;
- return;
- }
- if(c == erase_char || c == '\b') {
- if(bufp != obufp) {
- bufp--;
- putstr("\b \b"); /* putsym converts \b */
- } else bell();
- } else if(c == '\n') {
- *bufp = 0;
- return;
- } else if(' ' <= c && c < '\177') {
- /* avoid isprint() - some people don't have it
- ' ' is not always a printing char */
- *bufp = c;
- bufp[1] = 0;
- putstr(bufp);
- if(bufp-obufp < BUFSZ-1 && bufp-obufp < COLNO)
- bufp++;
- } else if(c == kill_char || c == '\177') { /* Robert Viduya */
- /* this test last - @ might be the kill_char */
- while(bufp != obufp) {
- bufp--;
- putstr("\b \b");
- }
- } else
- bell();
- }
- }
-
- getret() {
- cgetret("");
- }
-
- cgetret(s)
- register char *s;
- {
- putsym('\n');
- if(flags.standout)
- standoutbeg();
- putstr("Hit ");
- putstr(flags.cbreak ? "space" : "return");
- putstr(" to continue: ");
- if(flags.standout)
- standoutend();
- xwaitforspace(s);
- }
-
- char morc; /* tell the outside world what char he used */
-
- xwaitforspace(s)
- register char *s; /* chars allowed besides space or return */
- {
- register int c;
-
- morc = 0;
- while((c = readchar()) != '\n') {
- if(flags.cbreak) {
- if(c == ' ') break;
- if(s && index(s,c)) {
- morc = c;
- break;
- }
- bell();
- }
- }
- }
-
- char *
- parse()
- {
- static char inline[COLNO];
- register foo;
-
- flags.move = 1;
- if(!Invisible) curs_on_u(); else home();
- #ifdef DGK
- /* provide feedback when the multi count gets large -dgk */
- while((foo = readchar()) >= '0' && foo <= '9') {
- multi = 10*multi+foo-'0';
- if (multi >= 10) {
- remember_topl();
- home();
- cl_end();
- printf("count: %d", multi);
- }
- }
- #else
- while((foo = readchar()) >= '0' && foo <= '9')
- multi = 10*multi+foo-'0';
- #endif DGK
- if(multi) {
- multi--;
- save_cm = inline;
- }
- inline[0] = foo;
- inline[1] = 0;
- if(foo == 'f' || foo == 'F'){
- inline[1] = getchar();
- #ifdef QUEST
- if(inline[1] == foo) inline[2] = getchar(); else
- #endif QUEST
- inline[2] = 0;
- }
- if(foo == 'm' || foo == 'M'){
- inline[1] = getchar();
- inline[2] = 0;
- }
- clrlin();
- return(inline);
- }
-
- char
- readchar() {
- register int sym;
-
- (void) fflush(stdout);
- if((sym = getchar()) == EOF)
- #ifdef NR_OF_EOFS
- { /*
- * Some SYSV systems seem to return EOFs for various reasons
- * (?like when one hits break or for interrupted systemcalls?),
- * and we must see several before we quit.
- */
- register int cnt = NR_OF_EOFS;
- while (cnt--) {
- clearerr(stdin); /* omit if clearerr is undefined */
- if((sym = getchar()) != EOF) goto noteof;
- }
- end_of_input();
- noteof: ;
- }
- #else
- end_of_input();
- #endif NR_OF_EOFS
- if(flags.toplin == 1)
- flags.toplin = 2;
- return((char) sym);
- }
-
- end_of_input()
- {
- settty("End of input?\n");
- clearlocks();
- exit(0);
- }
-