Source:NetHack 2.3e/unixtty.c

Below is the full text to unixtty.c from the source code of NetHack 2.3e. To link to a particular line, write [[NetHack 2.3e/unixtty.c#line123]], for example.

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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