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Source:NetHack 2.2a/unixtty.c

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Below is the full text to unixtty.c from the source code of NetHack 2.2a. To link to a particular line, write [[NetHack 2.2a/unixtty.c#line123]], for example.

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

Screenshots and source code from Hack are used under the CWI license.
1.    /*	SCCS Id: @(#)unixtty.c	2.1	87/11/09
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.   #define	ON	1
15.   #define OFF	0
16.   
17.   /*
18.    * The distinctions here are not BSD - rest but rather USG - rest, as
19.    * BSD still has the old sgttyb structure, but SYSV has termio. Thus:
20.    */
21.   #ifdef BSD
22.   #define	V7
23.   #else
24.   #define USG
25.   #endif
26.   
27.   /*
28.    * Some systems may have getchar() return EOF for various reasons, and
29.    * we should not quit before seeing at least NR_OF_EOFS consecutive EOFs.
30.    */
31.   #ifndef BSD
32.   #define	NR_OF_EOFS	20
33.   #endif
34.   
35.   
36.   #ifdef USG
37.   
38.   #include	<termio.h>
39.   #define termstruct	termio
40.   #define kill_sym	c_cc[VKILL]
41.   #define erase_sym	c_cc[VERASE]
42.   #define EXTABS		TAB3
43.   #define tabflgs		c_oflag
44.   #define echoflgs	c_lflag
45.   #define cbrkflgs	c_lflag
46.   #define CBRKMASK	ICANON
47.   #define CBRKON		! /* reverse condition */
48.   #define OSPEED(x)	((x).c_cflag & CBAUD)
49.   #define GTTY(x)		(ioctl(0, TCGETA, x))
50.   /* STTY now modified to run under Sys V R3.	- may have to be #ifdef'ed */
51.   #define STTY(x)		(ioctl(0, TCSETAW, x))	/* TCSETAF? TCSETAW? */
52.   
53.   #else	/* V7 */
54.   
55.   #include	<sgtty.h>
56.   #define termstruct	sgttyb
57.   #define	kill_sym	sg_kill
58.   #define	erase_sym	sg_erase
59.   #define EXTABS		XTABS
60.   #define tabflgs		sg_flags
61.   #define echoflgs	sg_flags
62.   #define cbrkflgs	sg_flags
63.   #define CBRKMASK	CBREAK
64.   #define CBRKON		/* empty */
65.   #define OSPEED(x)	(x).sg_ospeed
66.   #define GTTY(x)		(gtty(0, x))
67.   #define STTY(x)		(stty(0, x))
68.   
69.   #endif
70.   
71.   extern short ospeed;
72.   static char erase_char, kill_char;
73.   static boolean settty_needed = FALSE;
74.   struct termstruct inittyb, curttyb;
75.   
76.   /*
77.    * Get initial state of terminal, set ospeed (for termcap routines)
78.    * and switch off tab expansion if necessary.
79.    * Called by startup() in termcap.c and after returning from ! or ^Z
80.    */
81.   gettty(){
82.   	if(GTTY(&inittyb) < 0)
83.   		perror("Hack (gettty)");
84.   	curttyb = inittyb;
85.   	ospeed = OSPEED(inittyb);
86.   	erase_char = inittyb.erase_sym;
87.   	kill_char = inittyb.kill_sym;
88.   	getioctls();
89.   
90.   	/* do not expand tabs - they might be needed inside a cm sequence */
91.   	if(curttyb.tabflgs & EXTABS) {
92.   		curttyb.tabflgs &= ~EXTABS;
93.   		setctty();
94.   	}
95.   	settty_needed = TRUE;
96.   }
97.   
98.   /* reset terminal to original state */
99.   settty(s) char *s; {
100.  	clear_screen();
101.  	end_screen();
102.  	if(s) printf(s);
103.  	(void) fflush(stdout);
104.  	if(STTY(&inittyb) < 0)
105.  		perror("Hack (settty)");
106.  	flags.echo = (inittyb.echoflgs & ECHO) ? ON : OFF;
107.  	flags.cbreak = (CBRKON(inittyb.cbrkflgs & CBRKMASK)) ? ON : OFF;
108.  	setioctls();
109.  }
110.  
111.  setctty(){
112.  	if(STTY(&curttyb) < 0)
113.  		perror("Hack (setctty)");
114.  }
115.  
116.  
117.  setftty(){
118.  register int ef = 0;			/* desired value of flags & ECHO */
119.  register int cf = CBRKON(CBRKMASK);	/* desired value of flags & CBREAK */
120.  register int change = 0;
121.  	flags.cbreak = ON;
122.  	flags.echo = OFF;
123.  	/* Should use (ECHO|CRMOD) here instead of ECHO */
124.  	if((curttyb.echoflgs & ECHO) != ef){
125.  		curttyb.echoflgs &= ~ECHO;
126.  /*		curttyb.echoflgs |= ef;					*/
127.  		change++;
128.  	}
129.  	if((curttyb.cbrkflgs & CBRKMASK) != cf){
130.  		curttyb.cbrkflgs &= ~CBRKMASK;
131.  		curttyb.cbrkflgs |= cf;
132.  #ifdef USG
133.  		/* be satisfied with one character; no timeout */
134.  		curttyb.c_cc[VMIN] = 1;		/* was VEOF */
135.  		curttyb.c_cc[VTIME] = 0;	/* was VEOL */
136.  #endif
137.  		change++;
138.  	}
139.  	if(change){
140.  		setctty();
141.  	}
142.  	start_screen();
143.  }
144.  
145.  
146.  /* fatal error */
147.  /*VARARGS1*/
148.  error(s,x,y) char *s; {
149.  	if(settty_needed)
150.  		settty((char *) 0);
151.  	printf(s,x,y);
152.  	putchar('\n');
153.  	exit(1);
154.  }
155.  
156.  /*
157.   * Read a line closed with '\n' into the array char bufp[BUFSZ].
158.   * (The '\n' is not stored. The string is closed with a '\0'.)
159.   * Reading can be interrupted by an escape ('\033') - now the
160.   * resulting string is "\033".
161.   */
162.  getlin(bufp)
163.  register char *bufp;
164.  {
165.  	register char *obufp = bufp;
166.  	register int c;
167.  
168.  	flags.toplin = 2;		/* nonempty, no --More-- required */
169.  	for(;;) {
170.  		(void) fflush(stdout);
171.  		if((c = getchar()) == EOF) {
172.  			*bufp = 0;
173.  			return;
174.  		}
175.  		if(c == '\033') {
176.  			*obufp = c;
177.  			obufp[1] = 0;
178.  			return;
179.  		}
180.  		if(c == erase_char || c == '\b') {
181.  			if(bufp != obufp) {
182.  				bufp--;
183.  				putstr("\b \b"); /* putsym converts \b */
184.  			} else	bell();
185.  		} else if(c == '\n') {
186.  			*bufp = 0;
187.  			return;
188.  		} else if(' ' <= c && c < '\177') {
189.  				/* avoid isprint() - some people don't have it
190.  				   ' ' is not always a printing char */
191.  			*bufp = c;
192.  			bufp[1] = 0;
193.  			putstr(bufp);
194.  			if(bufp-obufp < BUFSZ-1 && bufp-obufp < COLNO)
195.  				bufp++;
196.  		} else if(c == kill_char || c == '\177') { /* Robert Viduya */
197.  				/* this test last - @ might be the kill_char */
198.  			while(bufp != obufp) {
199.  				bufp--;
200.  				putstr("\b \b");
201.  			}
202.  		} else
203.  			bell();
204.  	}
205.  }
206.  
207.  getret() {
208.  	cgetret("");
209.  }
210.  
211.  cgetret(s)
212.  register char *s;
213.  {
214.  	putsym('\n');
215.  	if(flags.standout)
216.  		standoutbeg();
217.  	putstr("Hit ");
218.  	putstr(flags.cbreak ? "space" : "return");
219.  	putstr(" to continue: ");
220.  	if(flags.standout)
221.  		standoutend();
222.  	xwaitforspace(s);
223.  }
224.  
225.  char morc;	/* tell the outside world what char he used */
226.  
227.  xwaitforspace(s)
228.  register char *s;	/* chars allowed besides space or return */
229.  {
230.  register int c;
231.  
232.  	morc = 0;
233.  
234.  	while((c = readchar()) != '\n') {
235.  	    if(flags.cbreak) {
236.  		if(c == ' ') break;
237.  		if(s && index(s,c)) {
238.  			morc = c;
239.  			break;
240.  		}
241.  		bell();
242.  	    }
243.  	}
244.  }
245.  
246.  static int last_multi;
247.  
248.  char *
249.  parse()
250.  {
251.  	static char inline[COLNO];
252.  	register foo;
253.  
254.  	multi = 0;
255.  	flags.move = 1;
256.  	if(!Invisible) curs_on_u(); else home();
257.  	while((foo = readchar()) >= '0' && foo <= '9') {
258.  		multi = 10*multi+foo-'0';
259.  #ifdef DGKMOD
260.  		if (multi < 0 || multi > LARGEST_INT)
261.  			multi = LARGEST_INT;
262.  		if (multi > 9) {
263.  			remember_topl();
264.  			home();
265.  			cl_end();
266.  			printf("Count: %d", multi);
267.  		}
268.  #endif
269.  		last_multi = multi;
270.  	}
271.  # ifdef REDO
272.  	if (foo == DOAGAIN || in_doagain)
273.  		multi = last_multi;
274.  	else {
275.  		savech(0);	/* reset input queue */
276.  		savech(foo);
277.  	}
278.  # endif
279.  	if(multi) {
280.  		multi--;
281.  		save_cm = inline;
282.  	}
283.  	inline[0] = foo;
284.  	inline[1] = 0;
285.  	if(foo == 'g' || foo == 'G'){
286.  		inline[1] = getchar();
287.  #ifdef QUEST
288.  		if(inline[1] == foo) inline[2] = getchar(); else
289.  #endif
290.  		inline[2] = 0;
291.  	}
292.  	if(foo == 'm' || foo == 'M'){
293.  		inline[1] = getchar();
294.  		inline[2] = 0;
295.  	}
296.  	clrlin();
297.  	return(inline);
298.  }
299.  
300.  char
301.  readchar() {
302.  	register int sym;
303.  
304.  	(void) fflush(stdout);
305.  	if((sym = getchar()) == EOF)
306.  #ifdef NR_OF_EOFS
307.  	{ /*
308.  	   * Some SYSV systems seem to return EOFs for various reasons
309.  	   * (?like when one hits break or for interrupted systemcalls?),
310.  	   * and we must see several before we quit.
311.  	   */
312.  		register int cnt = NR_OF_EOFS;
313.  		while (cnt--) {
314.  		    clearerr(stdin);	/* omit if clearerr is undefined */
315.  		    if((sym = getchar()) != EOF) goto noteof;
316.  		}
317.  		end_of_input();
318.  	     noteof:	;
319.  	}
320.  #else
321.  		end_of_input();
322.  #endif /* NR_OF_EOFS /**/
323.  	if(flags.toplin == 1)
324.  		flags.toplin = 2;
325.  	return((char) sym);
326.  }
327.  
328.  end_of_input()
329.  {
330.  	settty("End of input?\n");
331.  	clearlocks();
332.  	exit(0);
333.  }
334.  
335.  #ifdef COM_COMPL
336.  /* Read in an extended command - doing command line completion for
337.   * when enough character have been entered to make a unique command.
338.   * This is just a modified getlin().   -jsb
339.   */
340.  get_ext_cmd(bufp)
341.  register char *bufp;
342.  {
343.  	register char *obufp = bufp;
344.  	register int c;
345.  	int com_index, index;
346.  
347.  	flags.toplin = 2;		/* nonempty, no --More-- required */
348.  
349.  	for(;;) {
350.  		(void) fflush(stdout);
351.  		if((c = readchar()) == EOF) {
352.  			*bufp = 0;
353.  			return;
354.  		}
355.  		if(c == '\033') {
356.  			*obufp = c;
357.  			obufp[1] = 0;
358.  			return;
359.  		}
360.  		if(c == erase_char || c == '\b') {
361.  			if(bufp != obufp) {
362.  				bufp--;
363.  				putstr("\b \b"); /* putsym converts \b */
364.  			} else	bell();
365.  		} else if(c == '\n') {
366.  			*bufp = 0;
367.  			return;
368.  		} else if(' ' <= c && c < '\177') {
369.  				/* avoid isprint() - some people don't have it
370.  				   ' ' is not always a printing char */
371.  			*bufp = c;
372.  			bufp[1] = 0;
373.  			index = 0;
374.  			com_index = -1;
375.  
376.  			while(extcmdlist[index].ef_txt != (char *) 0){
377.  				if(!strncmp(obufp, extcmdlist[index].ef_txt,
378.  				strlen(obufp)))
379.  					if(com_index == -1) /* No matches yet*/
380.  					    com_index = index;
381.  					else /* More than 1 match */
382.  					    com_index = -2;
383.  				index++;
384.  			}
385.  			if(com_index >= 0){
386.  				strcpy(obufp,
387.  				extcmdlist[com_index].ef_txt);
388.  				/* finish print our string */
389.  				putstr(bufp);
390.  				bufp = obufp; /* reset it */
391.  				if(strlen(obufp) < BUFSIZ-1 &&
392.  				 strlen(obufp) < COLNO)
393.  					/* set bufp at the end of our
394.  					 * string
395.  					 */
396.  					bufp += strlen(obufp);
397.  			} else {
398.  				putstr(bufp);
399.  				if(bufp-obufp < BUFSZ-1 && bufp-obufp < COLNO)
400.  					bufp++;
401.  			}
402.  		} else if(c == kill_char || c == '\177') { /* Robert Viduya */
403.  				/* this test last - @ might be the kill_char */
404.  			while(bufp != obufp) {
405.  				bufp--;
406.  				putstr("\b \b");
407.  			}
408.  		} else
409.  			bell();
410.  	}
411.  
412.  }
413.  #endif COM_COMPL

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