Source:NetHack 2.3e/unixtty.c

Below is the full text to unixtty.c from the source code of NetHack 2.3e.

Warning! This is the source code from an old release. For newer releases, see Source code

Screenshots and source code from Hack are used under the CWI license.

1.    /*	SCCS Id: @(#)unixtty.c	2.3	88/03/31
2.    /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
3.    /* tty.c - (Unix) version */
4.    
5.    /* With thanks to the people who sent code for SYSV - hpscdi!jon,
6.     * arnold@ucsf-cgl, wcs@bo95b, cbcephus!pds and others.
7.     */
8.    
9.    #include	<stdio.h>
10.   #include	"extern.h"
11.   #include	"hack.h"
12.   #include	"func_tab.h"
13.   
14.   extern void savech();
15.   
16.   #define	ON	1
17.   #define OFF	0
18.   
19.   /*
20.    * The distinctions here are not BSD - rest but rather USG - rest, as
21.    * BSD still has the old sgttyb structure, but SYSV has termio. Thus:
22.    */
23.   #ifdef BSD
24.   #define	V7
25.   #else
26.   #define USG
27.   #endif
28.   
29.   /*
30.    * Some systems may have getchar() return EOF for various reasons, and
31.    * we should not quit before seeing at least NR_OF_EOFS consecutive EOFs.
32.    */
33.   #ifndef BSD
34.   #define	NR_OF_EOFS	20
35.   #endif
36.   
37.   
38.   #ifdef USG
39.   
40.   #include	<termio.h>
41.   #define termstruct	termio
42.   #define kill_sym	c_cc[VKILL]
43.   #define erase_sym	c_cc[VERASE]
44.   #define EXTABS		TAB3
45.   #define tabflgs		c_oflag
46.   #define echoflgs	c_lflag
47.   #define cbrkflgs	c_lflag
48.   #define CBRKMASK	ICANON
49.   #define CBRKON		! /* reverse condition */
50.   #define OSPEED(x)	((x).c_cflag & CBAUD)
51.   #define GTTY(x)		(ioctl(0, TCGETA, x))
52.   /* STTY now modified to run under Sys V R3.	- may have to be #ifdef'ed */
53.   #define STTY(x)		(ioctl(0, TCSETAW, x))	/* TCSETAF? TCSETAW? */
54.   
55.   #else	/* V7 */
56.   
57.   #include	<sgtty.h>
58.   #define termstruct	sgttyb
59.   #define	kill_sym	sg_kill
60.   #define	erase_sym	sg_erase
61.   #define EXTABS		XTABS
62.   #define tabflgs		sg_flags
63.   #define echoflgs	sg_flags
64.   #define cbrkflgs	sg_flags
65.   #define CBRKMASK	CBREAK
66.   #define CBRKON		/* empty */
67.   #define OSPEED(x)	(x).sg_ospeed
68.   #define GTTY(x)		(gtty(0, x))
69.   #define STTY(x)		(stty(0, x))
70.   
71.   #endif
72.   
73.   extern short ospeed;
74.   static char erase_char, kill_char;
75.   static boolean settty_needed = FALSE;
76.   struct termstruct inittyb, curttyb;
77.   
78.   /*
79.    * Get initial state of terminal, set ospeed (for termcap routines)
80.    * and switch off tab expansion if necessary.
81.    * Called by startup() in termcap.c and after returning from ! or ^Z
82.    */
83.   gettty(){
84.   	if(GTTY(&inittyb) < 0)
85.   		perror("Hack (gettty)");
86.   	curttyb = inittyb;
87.   	ospeed = OSPEED(inittyb);
88.   	erase_char = inittyb.erase_sym;
89.   	kill_char = inittyb.kill_sym;
90.   	getioctls();
91.   
92.   	/* do not expand tabs - they might be needed inside a cm sequence */
93.   	if(curttyb.tabflgs & EXTABS) {
94.   		curttyb.tabflgs &= ~EXTABS;
95.   		setctty();
96.   	}
97.   	settty_needed = TRUE;
98.   }
99.   
100.  /* reset terminal to original state */
101.  settty(s) char *s; {
102.  	clear_screen();
103.  	end_screen();
104.  	if(s) printf(s);
105.  	(void) fflush(stdout);
106.  	if(STTY(&inittyb) < 0)
107.  		perror("Hack (settty)");
108.  	flags.echo = (inittyb.echoflgs & ECHO) ? ON : OFF;
109.  	flags.cbreak = (CBRKON(inittyb.cbrkflgs & CBRKMASK)) ? ON : OFF;
110.  	setioctls();
111.  }
112.  
113.  setctty(){
114.  	if(STTY(&curttyb) < 0)
115.  		perror("Hack (setctty)");
116.  }
117.  
118.  
119.  setftty(){
120.  register int ef = 0;			/* desired value of flags & ECHO */
121.  register int cf = CBRKON(CBRKMASK);	/* desired value of flags & CBREAK */
122.  register int change = 0;
123.  	flags.cbreak = ON;
124.  	flags.echo = OFF;
125.  	/* Should use (ECHO|CRMOD) here instead of ECHO */
126.  	if((curttyb.echoflgs & ECHO) != ef){
127.  		curttyb.echoflgs &= ~ECHO;
128.  /*		curttyb.echoflgs |= ef;					*/
129.  		change++;
130.  	}
131.  	if((curttyb.cbrkflgs & CBRKMASK) != cf){
132.  		curttyb.cbrkflgs &= ~CBRKMASK;
133.  		curttyb.cbrkflgs |= cf;
134.  #ifdef USG
135.  		/* be satisfied with one character; no timeout */
136.  		curttyb.c_cc[VMIN] = 1;		/* was VEOF */
137.  		curttyb.c_cc[VTIME] = 0;	/* was VEOL */
138.  #endif
139.  		change++;
140.  	}
141.  	if(change){
142.  		setctty();
143.  	}
144.  	start_screen();
145.  }
146.  
147.  
148.  /* fatal error */
149.  /*VARARGS1*/
150.  error(s,x,y) char *s; {
151.  	if(settty_needed)
152.  		settty((char *) 0);
153.  	printf(s,x,y);
154.  	putchar('\n');
155.  	exit(1);
156.  }
157.  
158.  /*
159.   * Read a line closed with '\n' into the array char bufp[BUFSZ].
160.   * (The '\n' is not stored. The string is closed with a '\0'.)
161.   * Reading can be interrupted by an escape ('\033') - now the
162.   * resulting string is "\033".
163.   */
164.  getlin(bufp)
165.  register char *bufp;
166.  {
167.  	register char *obufp = bufp;
168.  	register int c;
169.  
170.  	flags.toplin = 2;		/* nonempty, no --More-- required */
171.  	for(;;) {
172.  		(void) fflush(stdout);
173.  		if((c = getchar()) == EOF) {
174.  			*bufp = 0;
175.  			return;
176.  		}
177.  		if(c == '\033') {
178.  			*obufp = c;
179.  			obufp[1] = 0;
180.  			return;
181.  		}
182.  		if(c == erase_char || c == '\b') {
183.  			if(bufp != obufp) {
184.  				bufp--;
185.  				putstr("\b \b"); /* putsym converts \b */
186.  			} else	bell();
187.  		} else if(c == '\n') {
188.  			*bufp = 0;
189.  			return;
190.  		} else if(' ' <= c && c < '\177') {
191.  				/* avoid isprint() - some people don't have it
192.  				   ' ' is not always a printing char */
193.  			*bufp = c;
194.  			bufp[1] = 0;
195.  			putstr(bufp);
196.  			if(bufp-obufp < BUFSZ-1 && bufp-obufp < COLNO)
197.  				bufp++;
198.  		} else if(c == kill_char || c == '\177') { /* Robert Viduya */
199.  				/* this test last - @ might be the kill_char */
200.  			while(bufp != obufp) {
201.  				bufp--;
202.  				putstr("\b \b");
203.  			}
204.  		} else
205.  			bell();
206.  	}
207.  }
208.  
209.  getret() {
210.  	cgetret("");
211.  }
212.  
213.  cgetret(s)
214.  register char *s;
215.  {
216.  	putsym('\n');
217.  	if(flags.standout)
218.  		standoutbeg();
219.  	putstr("Hit ");
220.  	putstr(flags.cbreak ? "space" : "return");
221.  	putstr(" to continue: ");
222.  	if(flags.standout)
223.  		standoutend();
224.  	xwaitforspace(s);
225.  }
226.  
227.  char morc;	/* tell the outside world what char he used */
228.  
229.  xwaitforspace(s)
230.  register char *s;	/* chars allowed besides space or return */
231.  {
232.  register int c;
233.  
234.  	morc = 0;
235.  
236.  	while((c = readchar()) != '\n') {
237.  	    if(flags.cbreak) {
238.  		if(c == ' ') break;
239.  		if(s && index(s,c)) {
240.  			morc = c;
241.  			break;
242.  		}
243.  		bell();
244.  	    }
245.  	}
246.  }
247.  
248.  static int last_multi;
249.  
250.  char *
251.  parse()
252.  {
253.  	static char inline[COLNO];
254.  	register foo;
255.  
256.  	multi = 0;
257.  	flags.move = 1;
258.  	if(!Invisible) curs_on_u(); else home();
259.  	while((foo = readchar()) >= '0' && foo <= '9') {
260.  		multi = 10*multi+foo-'0';
261.  #ifdef DGKMOD
262.  		if (multi < 0 || multi > LARGEST_INT)
263.  			multi = LARGEST_INT;
264.  		if (multi > 9) {
265.  			remember_topl();
266.  			home();
267.  			cl_end();
268.  			printf("Count: %d", multi);
269.  		}
270.  #endif
271.  		last_multi = multi;
272.  	}
273.  # ifdef REDO
274.  	if (foo == DOAGAIN || in_doagain)
275.  		multi = last_multi;
276.  	else {
277.  		savech(0);	/* reset input queue */
278.  		savech(foo);
279.  	}
280.  # endif
281.  	if(multi) {
282.  		multi--;
283.  		save_cm = inline;
284.  	}
285.  	inline[0] = foo;
286.  	inline[1] = 0;
287.  	if(foo == 'g' || foo == 'G'){
288.  		inline[1] = getchar();
289.  #ifdef QUEST
290.  		if(inline[1] == foo) inline[2] = getchar(); else
291.  #endif
292.  		inline[2] = 0;
293.  	}
294.  	if(foo == 'm' || foo == 'M'){
295.  		inline[1] = getchar();
296.  		inline[2] = 0;
297.  	}
298.  	clrlin();
299.  	return(inline);
300.  }
301.  
302.  char
303.  readchar() {
304.  	register int sym;
305.  
306.  	(void) fflush(stdout);
307.  	if((sym = getchar()) == EOF)
308.  #ifdef NR_OF_EOFS
309.  	{ /*
310.  	   * Some SYSV systems seem to return EOFs for various reasons
311.  	   * (?like when one hits break or for interrupted systemcalls?),
312.  	   * and we must see several before we quit.
313.  	   */
314.  		register int cnt = NR_OF_EOFS;
315.  		while (cnt--) {
316.  		    clearerr(stdin);	/* omit if clearerr is undefined */
317.  		    if((sym = getchar()) != EOF) goto noteof;
318.  		}
319.  		end_of_input();
320.  	     noteof:	;
321.  	}
322.  #else
323.  		end_of_input();
324.  #endif /* NR_OF_EOFS /**/
325.  	if(flags.toplin == 1)
326.  		flags.toplin = 2;
327.  	return((char) sym);
328.  }
329.  
330.  end_of_input()
331.  {
332.  	settty("End of input?\n");
333.  	clearlocks();
334.  	exit(0);
335.  }
336.  
337.  #ifdef COM_COMPL
338.  /* Read in an extended command - doing command line completion for
339.   * when enough character have been entered to make a unique command.
340.   * This is just a modified getlin().   -jsb
341.   */
342.  get_ext_cmd(bufp)
343.  register char *bufp;
344.  {
345.  	register char *obufp = bufp;
346.  	register int c;
347.  	int com_index, index;
348.  
349.  	flags.toplin = 2;		/* nonempty, no --More-- required */
350.  
351.  	for(;;) {
352.  		(void) fflush(stdout);
353.  		if((c = readchar()) == EOF) {
354.  			*bufp = 0;
355.  			return;
356.  		}
357.  		if(c == '\033') {
358.  			*obufp = c;
359.  			obufp[1] = 0;
360.  			return;
361.  		}
362.  		if(c == erase_char || c == '\b') {
363.  			if(bufp != obufp) {
364.  				bufp--;
365.  				putstr("\b \b"); /* putsym converts \b */
366.  			} else	bell();
367.  		} else if(c == '\n') {
368.  			*bufp = 0;
369.  			return;
370.  		} else if(' ' <= c && c < '\177') {
371.  				/* avoid isprint() - some people don't have it
372.  				   ' ' is not always a printing char */
373.  			*bufp = c;
374.  			bufp[1] = 0;
375.  			index = 0;
376.  			com_index = -1;
377.  
378.  			while(extcmdlist[index].ef_txt != (char *) 0){
379.  				if(!strncmp(obufp, extcmdlist[index].ef_txt,
380.  				strlen(obufp)))
381.  					if(com_index == -1) /* No matches yet*/
382.  					    com_index = index;
383.  					else /* More than 1 match */
384.  					    com_index = -2;
385.  				index++;
386.  			}
387.  			if(com_index >= 0){
388.  				strcpy(obufp,
389.  				extcmdlist[com_index].ef_txt);
390.  				/* finish print our string */
391.  				putstr(bufp);
392.  				bufp = obufp; /* reset it */
393.  				if(strlen(obufp) < BUFSIZ-1 &&
394.  				 strlen(obufp) < COLNO)
395.  					/* set bufp at the end of our
396.  					 * string
397.  					 */
398.  					bufp += strlen(obufp);
399.  			} else {
400.  				putstr(bufp);
401.  				if(bufp-obufp < BUFSZ-1 && bufp-obufp < COLNO)
402.  					bufp++;
403.  			}
404.  		} else if(c == kill_char || c == '\177') { /* Robert Viduya */
405.  				/* this test last - @ might be the kill_char */
406.  			while(bufp != obufp) {
407.  				bufp--;
408.  				putstr("\b \b");
409.  			}
410.  		} else
411.  			bell();
412.  	}
413.  
414.  }
415.  #endif COM_COMPL