Source:NetHack 1.4f/unixtty.c

Below is the full text to unixtty.c from the source code of NetHack 1.4f. To link to a particular line, write [[NetHack 1.4f/unixtty.c#line123]], for example.

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1.    /*	SCCS Id: @(#)unixtty.c	1.4	87/08/08
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.   #include	"func_tab.h"
11.   
12.   #define	ON	1
13.   #define OFF	0
14.   #define	BUFSZ	256
15.   
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.   #define STTY(x)		(ioctl(0, TCSETA, x))	/* TCSETAF? TCSETAW? */
51.   
52.   #else	/* V7 */
53.   
54.   #include	<sgtty.h>
55.   #define termstruct	sgttyb
56.   #define	kill_sym	sg_kill
57.   #define	erase_sym	sg_erase
58.   #define EXTABS		XTABS
59.   #define tabflgs		sg_flags
60.   #define echoflgs	sg_flags
61.   #define cbrkflgs	sg_flags
62.   #define CBRKMASK	CBREAK
63.   #define CBRKON		/* empty */
64.   #define OSPEED(x)	(x).sg_ospeed
65.   #define GTTY(x)		(gtty(0, x))
66.   #define STTY(x)		(stty(0, x))
67.   
68.   #endif
69.   
70.   extern short ospeed;
71.   static char erase_char, kill_char;
72.   static boolean settty_needed = FALSE;
73.   struct termstruct inittyb, curttyb;
74.   
75.   /*
76.    * Get initial state of terminal, set ospeed (for termcap routines)
77.    * and switch off tab expansion if necessary.
78.    * Called by startup() in termcap.c and after returning from ! or ^Z
79.    */
80.   gettty(){
81.   	if(GTTY(&inittyb) < 0)
82.   		perror("Hack (gettty)");
83.   	curttyb = inittyb;
84.   	ospeed = OSPEED(inittyb);
85.   	erase_char = inittyb.erase_sym;
86.   	kill_char = inittyb.kill_sym;
87.   	getioctls();
88.   
89.   	/* do not expand tabs - they might be needed inside a cm sequence */
90.   	if(curttyb.tabflgs & EXTABS) {
91.   		curttyb.tabflgs &= ~EXTABS;
92.   		setctty();
93.   	}
94.   	settty_needed = TRUE;
95.   }
96.   
97.   /* reset terminal to original state */
98.   settty(s) char *s; {
99.   	clear_screen();
100.  	end_screen();
101.  	if(s) printf(s);
102.  	(void) fflush(stdout);
103.  	if(STTY(&inittyb) < 0)
104.  		perror("Hack (settty)");
105.  	flags.echo = (inittyb.echoflgs & ECHO) ? ON : OFF;
106.  	flags.cbreak = (CBRKON(inittyb.cbrkflgs & CBRKMASK)) ? ON : OFF;
107.  	setioctls();
108.  }
109.  
110.  setctty(){
111.  	if(STTY(&curttyb) < 0)
112.  		perror("Hack (setctty)");
113.  }
114.  
115.  
116.  setftty(){
117.  register int ef = 0;			/* desired value of flags & ECHO */
118.  register int cf = CBRKON(CBRKMASK);	/* desired value of flags & CBREAK */
119.  register int change = 0;
120.  	flags.cbreak = ON;
121.  	flags.echo = OFF;
122.  	/* Should use (ECHO|CRMOD) here instead of ECHO */
123.  	if((curttyb.echoflgs & ECHO) != ef){
124.  		curttyb.echoflgs &= ~ECHO;
125.  /*		curttyb.echoflgs |= ef;					*/
126.  		change++;
127.  	}
128.  	if((curttyb.cbrkflgs & CBRKMASK) != cf){
129.  		curttyb.cbrkflgs &= ~CBRKMASK;
130.  		curttyb.cbrkflgs |= cf;
131.  #ifdef USG
132.  		/* be satisfied with one character; no timeout */
133.  		curttyb.c_cc[VMIN] = 1;		/* was VEOF */
134.  		curttyb.c_cc[VTIME] = 0;	/* was VEOL */
135.  #endif
136.  		change++;
137.  	}
138.  	if(change){
139.  		setctty();
140.  	}
141.  	start_screen();
142.  }
143.  
144.  
145.  /* fatal error */
146.  /*VARARGS1*/
147.  error(s,x,y) char *s; {
148.  	if(settty_needed)
149.  		settty((char *) 0);
150.  	printf(s,x,y);
151.  	putchar('\n');
152.  	exit(1);
153.  }
154.  
155.  /*
156.   * Read a line closed with '\n' into the array char bufp[BUFSZ].
157.   * (The '\n' is not stored. The string is closed with a '\0'.)
158.   * Reading can be interrupted by an escape ('\033') - now the
159.   * resulting string is "\033".
160.   */
161.  getlin(bufp)
162.  register char *bufp;
163.  {
164.  	register char *obufp = bufp;
165.  	register int c;
166.  
167.  	flags.toplin = 2;		/* nonempty, no --More-- required */
168.  	for(;;) {
169.  		(void) fflush(stdout);
170.  		if((c = getchar()) == EOF) {
171.  			*bufp = 0;
172.  			return;
173.  		}
174.  		if(c == '\033') {
175.  			*obufp = c;
176.  			obufp[1] = 0;
177.  			return;
178.  		}
179.  		if(c == erase_char || c == '\b') {
180.  			if(bufp != obufp) {
181.  				bufp--;
182.  				putstr("\b \b"); /* putsym converts \b */
183.  			} else	bell();
184.  		} else if(c == '\n') {
185.  			*bufp = 0;
186.  			return;
187.  		} else if(' ' <= c && c < '\177') {
188.  				/* avoid isprint() - some people don't have it
189.  				   ' ' is not always a printing char */
190.  			*bufp = c;
191.  			bufp[1] = 0;
192.  			putstr(bufp);
193.  			if(bufp-obufp < BUFSZ-1 && bufp-obufp < COLNO)
194.  				bufp++;
195.  		} else if(c == kill_char || c == '\177') { /* Robert Viduya */
196.  				/* this test last - @ might be the kill_char */
197.  			while(bufp != obufp) {
198.  				bufp--;
199.  				putstr("\b \b");
200.  			}
201.  		} else
202.  			bell();
203.  	}
204.  }
205.  
206.  getret() {
207.  	cgetret("");
208.  }
209.  
210.  cgetret(s)
211.  register char *s;
212.  {
213.  	putsym('\n');
214.  	if(flags.standout)
215.  		standoutbeg();
216.  	putstr("Hit ");
217.  	putstr(flags.cbreak ? "space" : "return");
218.  	putstr(" to continue: ");
219.  	if(flags.standout)
220.  		standoutend();
221.  	xwaitforspace(s);
222.  }
223.  
224.  char morc;	/* tell the outside world what char he used */
225.  
226.  xwaitforspace(s)
227.  register char *s;	/* chars allowed besides space or return */
228.  {
229.  register int c;
230.  
231.  	morc = 0;
232.  
233.  	while((c = readchar()) != '\n') {
234.  	    if(flags.cbreak) {
235.  		if(c == ' ') break;
236.  		if(s && index(s,c)) {
237.  			morc = c;
238.  			break;
239.  		}
240.  		bell();
241.  	    }
242.  	}
243.  }
244.  
245.  static int last_multi;
246.  
247.  char *
248.  parse()
249.  {
250.  	static char inline[COLNO];
251.  	register foo;
252.  
253.  	multi = 0;
254.  	flags.move = 1;
255.  	if(!Invisible) curs_on_u(); else home();
256.  	while((foo = readchar()) >= '0' && foo <= '9') {
257.  		multi = 10*multi+foo-'0';
258.  #ifdef DGKMOD
259.  		if (multi < 0 || multi > LARGEST_INT)
260.  			multi = LARGEST_INT;
261.  		if (multi > 9) {
262.  			remember_topl();
263.  			home();
264.  			cl_end();
265.  			printf("Count: %d", multi);
266.  		}
267.  #endif
268.  		last_multi = multi;
269.  	}
270.  # ifdef REDO
271.  	if (foo == DOAGAIN || in_doagain)
272.  		multi = last_multi;
273.  	else {
274.  		savech(0);	/* reset input queue */
275.  		savech(foo);
276.  	}
277.  # endif
278.  	if(multi) {
279.  		multi--;
280.  		save_cm = inline;
281.  	}
282.  	inline[0] = foo;
283.  	inline[1] = 0;
284.  	if(foo == 'g' || foo == 'G'){
285.  		inline[1] = getchar();
286.  #ifdef QUEST
287.  		if(inline[1] == foo) inline[2] = getchar(); else
288.  #endif
289.  		inline[2] = 0;
290.  	}
291.  	if(foo == 'm' || foo == 'M'){
292.  		inline[1] = getchar();
293.  		inline[2] = 0;
294.  	}
295.  	clrlin();
296.  	return(inline);
297.  }
298.  
299.  char
300.  readchar() {
301.  	register int sym;
302.  
303.  	(void) fflush(stdout);
304.  	if((sym = getchar()) == EOF)
305.  #ifdef NR_OF_EOFS
306.  	{ /*
307.  	   * Some SYSV systems seem to return EOFs for various reasons
308.  	   * (?like when one hits break or for interrupted systemcalls?),
309.  	   * and we must see several before we quit.
310.  	   */
311.  		register int cnt = NR_OF_EOFS;
312.  		while (cnt--) {
313.  		    clearerr(stdin);	/* omit if clearerr is undefined */
314.  		    if((sym = getchar()) != EOF) goto noteof;
315.  		}
316.  		end_of_input();
317.  	     noteof:	;
318.  	}
319.  #else
320.  		end_of_input();
321.  #endif /* NR_OF_EOFS /**/
322.  	if(flags.toplin == 1)
323.  		flags.toplin = 2;
324.  	return((char) sym);
325.  }
326.  
327.  end_of_input()
328.  {
329.  	settty("End of input?\n");
330.  	clearlocks();
331.  	exit(0);
332.  }
333.  
334.  #ifdef COM_COMPL
335.  /* Read in an extended command - doing command line completion for
336.   * when enough character have been entered to make a unique command.
337.   * This is just a modified getlin().   -jsb
338.   */
339.  get_ext_cmd(bufp)
340.  register char *bufp;
341.  {
342.  	register char *obufp = bufp;
343.  	register int c;
344.  	int com_index, index;
345.  
346.  	flags.toplin = 2;		/* nonempty, no --More-- required */
347.  
348.  	for(;;) {
349.  		(void) fflush(stdout);
350.  		if((c = readchar()) == EOF) {
351.  			*bufp = 0;
352.  			return;
353.  		}
354.  		if(c == '\033') {
355.  			*obufp = c;
356.  			obufp[1] = 0;
357.  			return;
358.  		}
359.  		if(c == erase_char || c == '\b') {
360.  			if(bufp != obufp) {
361.  				bufp--;
362.  				putstr("\b \b"); /* putsym converts \b */
363.  			} else	bell();
364.  		} else if(c == '\n') {
365.  			*bufp = 0;
366.  			return;
367.  		} else if(' ' <= c && c < '\177') {
368.  				/* avoid isprint() - some people don't have it
369.  				   ' ' is not always a printing char */
370.  			*bufp = c;
371.  			bufp[1] = 0;
372.  			index = 0;
373.  			com_index = -1;
374.  
375.  			while(extcmdlist[index].ef_txt != (char *) 0){
376.  				if(!strncmp(obufp, extcmdlist[index].ef_txt,
377.  				strlen(obufp)))
378.  					if(com_index == -1) /* No matches yet*/
379.  					    com_index = index;
380.  					else /* More than 1 match */
381.  					    com_index = -2;
382.  				index++;
383.  			}
384.  			if(com_index >= 0){
385.  				strcpy(obufp,
386.  				extcmdlist[com_index].ef_txt);
387.  				/* finish print our string */
388.  				putstr(bufp);
389.  				bufp = obufp; /* reset it */
390.  				if(strlen(obufp) < BUFSIZ-1 &&
391.  				 strlen(obufp) < COLNO)
392.  					/* set bufp at the end of our
393.  					 * string
394.  					 */
395.  					bufp += strlen(obufp);
396.  			} else {
397.  				putstr(bufp);
398.  				if(bufp-obufp < BUFSZ-1 && bufp-obufp < COLNO)
399.  					bufp++;
400.  			}
401.  		} else if(c == kill_char || c == '\177') { /* Robert Viduya */
402.  				/* this test last - @ might be the kill_char */
403.  			while(bufp != obufp) {
404.  				bufp--;
405.  				putstr("\b \b");
406.  			}
407.  		} else
408.  			bell();
409.  	}
410.  
411.  }
412.  #endif COM_COMPL