Source:NetHack 1.3d/unixtty.c

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Below is the full text to unixtty.c from the source code of NetHack 1.3d. To link to a particular line, write [[NetHack 1.3d/unixtty.c#line123]], for example.

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

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1.    /*	SCCS Id: @(#)unixtty.c	1.3	87/07/14
2.    /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
3.    /* tty.c - (Unix) version 1.0.3 */
4.    /* With thanks to the people who sent code for SYSV - hpscdi!jon,
5.       arnold@ucsf-cgl, wcs@bo95b, cbcephus!pds and others. */
6.    
7.    #include	<stdio.h>
8.    #include	"extern.h"
9.    #include	"flag.h"
10.   
11.   #define	ON	1
12.   #define OFF	0
13.   #define	BUFSZ	256
14.   
15.   
16.   /*
17.    * The distinctions here are not BSD - rest but rather USG - rest, as
18.    * BSD still has the old sgttyb structure, but SYSV has termio. Thus:
19.    */
20.   #ifdef BSD
21.   #define	V7
22.   #else
23.   #define USG
24.   #endif
25.   
26.   /*
27.    * Some systems may have getchar() return EOF for various reasons, and
28.    * we should not quit before seeing at least NR_OF_EOFS consecutive EOFs.
29.    */
30.   #ifndef BSD
31.   #define	NR_OF_EOFS	20
32.   #endif
33.   
34.   
35.   #ifdef USG
36.   
37.   #include	<termio.h>
38.   #define termstruct	termio
39.   #define kill_sym	c_cc[VKILL]
40.   #define erase_sym	c_cc[VERASE]
41.   #define EXTABS		TAB3
42.   #define tabflgs		c_oflag
43.   #define echoflgs	c_lflag
44.   #define cbrkflgs	c_lflag
45.   #define CBRKMASK	ICANON
46.   #define CBRKON		! /* reverse condition */
47.   #define OSPEED(x)	((x).c_cflag & CBAUD)
48.   #define GTTY(x)		(ioctl(0, TCGETA, x))
49.   #define STTY(x)		(ioctl(0, TCSETA, x))	/* TCSETAF? TCSETAW? */
50.   
51.   #else	/* V7 */
52.   
53.   #include	<sgtty.h>
54.   #define termstruct	sgttyb
55.   #define	kill_sym	sg_kill
56.   #define	erase_sym	sg_erase
57.   #define EXTABS		XTABS
58.   #define tabflgs		sg_flags
59.   #define echoflgs	sg_flags
60.   #define cbrkflgs	sg_flags
61.   #define CBRKMASK	CBREAK
62.   #define CBRKON		/* empty */
63.   #define OSPEED(x)	(x).sg_ospeed
64.   #define GTTY(x)		(gtty(0, x))
65.   #define STTY(x)		(stty(0, x))
66.   
67.   #endif
68.   
69.   extern short ospeed;
70.   static char erase_char, kill_char;
71.   static boolean settty_needed = FALSE;
72.   struct termstruct inittyb, curttyb;
73.   
74.   /*
75.    * Get initial state of terminal, set ospeed (for termcap routines)
76.    * and switch off tab expansion if necessary.
77.    * Called by startup() in termcap.c and after returning from ! or ^Z
78.    */
79.   gettty(){
80.   	if(GTTY(&inittyb) < 0)
81.   		perror("Hack (gettty)");
82.   	curttyb = inittyb;
83.   	ospeed = OSPEED(inittyb);
84.   	erase_char = inittyb.erase_sym;
85.   	kill_char = inittyb.kill_sym;
86.   	getioctls();
87.   
88.   	/* do not expand tabs - they might be needed inside a cm sequence */
89.   	if(curttyb.tabflgs & EXTABS) {
90.   		curttyb.tabflgs &= ~EXTABS;
91.   		setctty();
92.   	}
93.   	settty_needed = TRUE;
94.   }
95.   
96.   /* reset terminal to original state */
97.   settty(s) char *s; {
98.   	clear_screen();
99.   	end_screen();
100.  	if(s) printf(s);
101.  	(void) fflush(stdout);
102.  	if(STTY(&inittyb) < 0)
103.  		perror("Hack (settty)");
104.  	flags.echo = (inittyb.echoflgs & ECHO) ? ON : OFF;
105.  	flags.cbreak = (CBRKON(inittyb.cbrkflgs & CBRKMASK)) ? ON : OFF;
106.  	setioctls();
107.  }
108.  
109.  setctty(){
110.  	if(STTY(&curttyb) < 0)
111.  		perror("Hack (setctty)");
112.  }
113.  
114.  
115.  setftty(){
116.  register int ef = 0;			/* desired value of flags & ECHO */
117.  register int cf = CBRKON(CBRKMASK);	/* desired value of flags & CBREAK */
118.  register int change = 0;
119.  	flags.cbreak = ON;
120.  	flags.echo = OFF;
121.  	/* Should use (ECHO|CRMOD) here instead of ECHO */
122.  	if((curttyb.echoflgs & ECHO) != ef){
123.  		curttyb.echoflgs &= ~ECHO;
124.  /*		curttyb.echoflgs |= ef;					*/
125.  		change++;
126.  	}
127.  	if((curttyb.cbrkflgs & CBRKMASK) != cf){
128.  		curttyb.cbrkflgs &= ~CBRKMASK;
129.  		curttyb.cbrkflgs |= cf;
130.  #ifdef USG
131.  		/* be satisfied with one character; no timeout */
132.  		curttyb.c_cc[VMIN] = 1;		/* was VEOF */
133.  		curttyb.c_cc[VTIME] = 0;	/* was VEOL */
134.  #endif
135.  		change++;
136.  	}
137.  	if(change){
138.  		setctty();
139.  	}
140.  	start_screen();
141.  }
142.  
143.  
144.  /* fatal error */
145.  /*VARARGS1*/
146.  error(s,x,y) char *s; {
147.  	if(settty_needed)
148.  		settty((char *) 0);
149.  	printf(s,x,y);
150.  	putchar('\n');
151.  	exit(1);
152.  }
153.  
154.  /*
155.   * Read a line closed with '\n' into the array char bufp[BUFSZ].
156.   * (The '\n' is not stored. The string is closed with a '\0'.)
157.   * Reading can be interrupted by an escape ('\033') - now the
158.   * resulting string is "\033".
159.   */
160.  getlin(bufp)
161.  register char *bufp;
162.  {
163.  	register char *obufp = bufp;
164.  	register int c;
165.  
166.  	flags.toplin = 2;		/* nonempty, no --More-- required */
167.  	for(;;) {
168.  		(void) fflush(stdout);
169.  		if((c = getchar()) == EOF) {
170.  			*bufp = 0;
171.  			return;
172.  		}
173.  		if(c == '\033') {
174.  			*obufp = c;
175.  			obufp[1] = 0;
176.  			return;
177.  		}
178.  		if(c == erase_char || c == '\b') {
179.  			if(bufp != obufp) {
180.  				bufp--;
181.  				putstr("\b \b"); /* putsym converts \b */
182.  			} else	bell();
183.  		} else if(c == '\n') {
184.  			*bufp = 0;
185.  			return;
186.  		} else if(' ' <= c && c < '\177') {
187.  				/* avoid isprint() - some people don't have it
188.  				   ' ' is not always a printing char */
189.  			*bufp = c;
190.  			bufp[1] = 0;
191.  			putstr(bufp);
192.  			if(bufp-obufp < BUFSZ-1 && bufp-obufp < COLNO)
193.  				bufp++;
194.  		} else if(c == kill_char || c == '\177') { /* Robert Viduya */
195.  				/* this test last - @ might be the kill_char */
196.  			while(bufp != obufp) {
197.  				bufp--;
198.  				putstr("\b \b");
199.  			}
200.  		} else
201.  			bell();
202.  	}
203.  }
204.  
205.  getret() {
206.  	cgetret("");
207.  }
208.  
209.  cgetret(s)
210.  register char *s;
211.  {
212.  	putsym('\n');
213.  	if(flags.standout)
214.  		standoutbeg();
215.  	putstr("Hit ");
216.  	putstr(flags.cbreak ? "space" : "return");
217.  	putstr(" to continue: ");
218.  	if(flags.standout)
219.  		standoutend();
220.  	xwaitforspace(s);
221.  }
222.  
223.  char morc;	/* tell the outside world what char he used */
224.  
225.  xwaitforspace(s)
226.  register char *s;	/* chars allowed besides space or return */
227.  {
228.  register int c;
229.  
230.  	morc = 0;
231.  
232.  	while((c = readchar()) != '\n') {
233.  	    if(flags.cbreak) {
234.  		if(c == ' ') break;
235.  		if(s && index(s,c)) {
236.  			morc = c;
237.  			break;
238.  		}
239.  		bell();
240.  	    }
241.  	}
242.  }
243.  
244.  static int last_multi;
245.  
246.  char *
247.  parse()
248.  {
249.  	static char inline[COLNO];
250.  	register foo;
251.  
252.  	multi = 0;
253.  	flags.move = 1;
254.  	if(!Invisible) curs_on_u(); else home();
255.  	while((foo = readchar()) >= '0' && foo <= '9') {
256.  		multi = 10*multi+foo-'0';
257.  #ifdef DGKMOD
258.  		if (multi < 0 || multi > LARGEST_INT)
259.  			multi = LARGEST_INT;
260.  		if (multi > 9) {
261.  			remember_topl();
262.  			home();
263.  			cl_end();
264.  			printf("Count: %d", multi);
265.  		}
266.  #endif
267.  		last_multi = multi;
268.  	}
269.  # ifdef REDO
270.  	if (foo == DOAGAIN || in_doagain)
271.  		multi = last_multi;
272.  	else {
273.  		savech(0);	/* reset input queue */
274.  		savech(foo);
275.  	}
276.  # endif
277.  	if(multi) {
278.  		multi--;
279.  		save_cm = inline;
280.  	}
281.  	inline[0] = foo;
282.  	inline[1] = 0;
283.  	if(foo == 'g' || foo == 'G'){
284.  		inline[1] = getchar();
285.  #ifdef QUEST
286.  		if(inline[1] == foo) inline[2] = getchar(); else
287.  #endif
288.  		inline[2] = 0;
289.  	}
290.  	if(foo == 'm' || foo == 'M'){
291.  		inline[1] = getchar();
292.  		inline[2] = 0;
293.  	}
294.  	clrlin();
295.  	return(inline);
296.  }
297.  
298.  char
299.  readchar() {
300.  	register int sym;
301.  
302.  	(void) fflush(stdout);
303.  	if((sym = getchar()) == EOF)
304.  #ifdef NR_OF_EOFS
305.  	{ /*
306.  	   * Some SYSV systems seem to return EOFs for various reasons
307.  	   * (?like when one hits break or for interrupted systemcalls?),
308.  	   * and we must see several before we quit.
309.  	   */
310.  		register int cnt = NR_OF_EOFS;
311.  		while (cnt--) {
312.  		    clearerr(stdin);	/* omit if clearerr is undefined */
313.  		    if((sym = getchar()) != EOF) goto noteof;
314.  		}
315.  		end_of_input();
316.  	     noteof:	;
317.  	}
318.  #else
319.  		end_of_input();
320.  #endif /* NR_OF_EOFS /**/
321.  	if(flags.toplin == 1)
322.  		flags.toplin = 2;
323.  	return((char) sym);
324.  }
325.  
326.  end_of_input()
327.  {
328.  	settty("End of input?\n");
329.  	clearlocks();
330.  	exit(0);
331.  }