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Source:NetHack 3.2.0/rumors.c

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Below is the full text to rumors.c from the source code of NetHack 3.2.0. To link to a particular line, write [[NetHack 3.2.0/rumors.c#line123]], for example.

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

The NetHack General Public License applies to screenshots, source code and other content from NetHack.
1.    /*	SCCS Id: @(#)rumors.c	3.2	95/08/04	*/
2.    /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
3.    /* NetHack may be freely redistributed.  See license for details. */
4.    
5.    #include "hack.h"
6.    #include "dlb.h"
7.    
8.    /*	[note: this comment is fairly old, but still accurate for 3.1]
9.     * Rumors have been entirely rewritten to speed up the access.  This is
10.    * essential when working from floppies.  Using fseek() the way that's done
11.    * here means rumors following longer rumors are output more often than those
12.    * following shorter rumors.  Also, you may see the same rumor more than once
13.    * in a particular game (although the odds are highly against it), but
14.    * this also happens with real fortune cookies.  -dgk
15.    */
16.   
17.   /*	3.1
18.    * The rumors file consists of a "do not edit" line, a hexadecimal number
19.    * giving the number of bytes of useful/true rumors, followed by those
20.    * true rumors (one per line), followed by the useless/false/misleading/cute
21.    * rumors (also one per line).  Number of bytes of untrue rumors is derived
22.    * via fseek(EOF)+ftell().
23.    *
24.    * The oracles file consists of a "do not edit" comment, a decimal count N
25.    * and set of N+1 hexadecimal fseek offsets, followed by N multiple-line
26.    * records, separated by "---" lines.  The first oracle is a special case,
27.    * and placed there by 'makedefs'.
28.    */
29.   
30.   static void FDECL(init_rumors, (dlb *));
31.   static void FDECL(init_oracles, (dlb *));
32.   static void FDECL(outoracle, (BOOLEAN_P));
33.   
34.   static long true_rumor_start,  true_rumor_size,  true_rumor_end,
35.   	    false_rumor_start, false_rumor_size, false_rumor_end;
36.   static int oracle_flg = 0;  /* -1=>don't use, 0=>need init, 1=>init done */
37.   static unsigned oracle_cnt = 0;
38.   static long *oracle_loc = 0;
39.   
40.   static void
41.   init_rumors(fp)
42.   dlb *fp;
43.   {
44.   	char line[BUFSZ];
45.   
46.   	(void) dlb_fgets(line, sizeof line, fp); /* skip "don't edit" comment */
47.   	(void) dlb_fgets(line, sizeof line, fp);
48.   	if (sscanf(line, "%6lx\n", &true_rumor_size) == 1 &&
49.   	    true_rumor_size > 0L) {
50.   	    (void) dlb_fseek(fp, 0L, SEEK_CUR);
51.   	    true_rumor_start  = dlb_ftell(fp);
52.   	    true_rumor_end    = true_rumor_start + true_rumor_size;
53.   	    (void) dlb_fseek(fp, 0L, SEEK_END);
54.   	    false_rumor_end   = dlb_ftell(fp);
55.   	    false_rumor_start = true_rumor_end;	/* ok, so it's redundant... */
56.   	    false_rumor_size  = false_rumor_end - false_rumor_start;
57.   	} else
58.   	    true_rumor_size = -1L;	/* init failed */
59.   }
60.   
61.   char *
62.   getrumor(truth, rumor_buf)
63.   int truth; /* 1=true, -1=false, 0=either */
64.   char *rumor_buf;
65.   {
66.   	dlb	*rumors;
67.   	long tidbit, beginning;
68.   	char	*endp, line[BUFSZ], xbuf[BUFSZ];
69.   
70.   	rumor_buf[0] = '\0';
71.   	if (true_rumor_size < 0L)	/* we couldn't open RUMORFILE */
72.   		return rumor_buf;
73.   
74.   	rumors = dlb_fopen(RUMORFILE, "r");
75.   
76.   	if (rumors) {
77.   		if (true_rumor_size == 0L) {	/* if this is 1st outrumor() */
78.   		    init_rumors(rumors);
79.   		    if (true_rumor_size < 0L) {	/* init failed */
80.   			Sprintf(rumor_buf, "Error reading \"%.80s\".",
81.   				RUMORFILE);
82.   			return rumor_buf;
83.   		    }
84.   		}
85.   		/*
86.   		 *	input:      1    0   -1
87.   		 *	 rn2 \ +1  2=T  1=T  0=F
88.   		 *	 adj./ +0  1=T  0=F -1=F
89.   		 */
90.   		switch (truth += rn2(2)) {
91.   		  case  2:	/*(might let a bogus input arg sneak thru)*/
92.   		  case  1:  beginning = true_rumor_start;
93.   			    tidbit = Rand() % true_rumor_size;
94.   			break;
95.   		  case  0:	/* once here, 0 => false rather than "either"*/
96.   		  case -1:  beginning = false_rumor_start;
97.   			    tidbit = Rand() % false_rumor_size;
98.   			break;
99.   		  default:
100.  			    impossible("strange truth value for rumor");
101.  			return strcpy(rumor_buf, "Oops...");
102.  		}
103.  		(void) dlb_fseek(rumors, beginning + tidbit, SEEK_SET);
104.  		(void) dlb_fgets(line, sizeof line, rumors);
105.  		if (!dlb_fgets(line, sizeof line, rumors) ||
106.  		    (truth > 0 && dlb_ftell(rumors) > true_rumor_end)) {
107.  			/* reached end of rumors -- go back to beginning */
108.  			(void) dlb_fseek(rumors, beginning, SEEK_SET);
109.  			(void) dlb_fgets(line, sizeof line, rumors);
110.  		}
111.  		if ((endp = index(line, '\n')) != 0) *endp = 0;
112.  		Strcat(rumor_buf, xcrypt(line, xbuf));
113.  		(void) dlb_fclose(rumors);
114.  		exercise(A_WIS, (truth > 0));
115.  	} else {
116.  		pline("Can't open rumors file!");
117.  		true_rumor_size = -1;	/* don't try to open it again */
118.  	}
119.  	return rumor_buf;
120.  }
121.  
122.  void
123.  outrumor(truth, cookie)
124.  int truth; /* 1=true, -1=false, 0=either */
125.  boolean cookie;
126.  {
127.  	static const char fortune_msg[] =
128.  		"This cookie has a scrap of paper inside.";
129.  	const char *line;
130.  	char buf[BUFSZ];
131.  
132.  	if (cookie && Blind) {
133.  		pline(fortune_msg);
134.  		pline("What a pity that you cannot read it!");
135.  		return;
136.  	}
137.  	line = getrumor(truth, buf);
138.  	if (!*line)
139.  		line = "NetHack rumors file closed for renovation.";
140.  	if (cookie) {
141.  		pline(fortune_msg);
142.  		pline("It reads:");
143.  		pline("%s", line);
144.  	} else {	/* if the Oracle is the only alternative */
145.  		pline("True to her word, the Oracle %ssays: ",
146.  		(!rn2(4) ? "offhandedly " : (!rn2(3) ? "casually " :
147.  		(rn2(2) ? "nonchalantly " : ""))));
148.  		verbalize("%s", line);
149.  		exercise(A_WIS, TRUE);
150.  	}
151.  }
152.  
153.  static void
154.  init_oracles(fp)
155.  dlb *fp;
156.  {
157.  	register int i;
158.  	char line[BUFSZ];
159.  	int cnt = 0;
160.  
161.  	/* this assumes we're only called once */
162.  	(void) dlb_fgets(line, sizeof line, fp); /* skip "don't edit" comment*/
163.  	(void) dlb_fgets(line, sizeof line, fp);
164.  	if (sscanf(line, "%5d\n", &cnt) == 1 && cnt > 0) {
165.  	    oracle_cnt = (unsigned) cnt;
166.  	    oracle_loc = (long *) alloc((unsigned)cnt * sizeof (long));
167.  	    for (i = 0; i < cnt; i++) {
168.  		(void) dlb_fgets(line, sizeof line, fp);
169.  		(void) sscanf(line, "%5lx\n", &oracle_loc[i]);
170.  	    }
171.  	}
172.  	return;
173.  }
174.  
175.  void
176.  save_oracles(fd)
177.  int fd;
178.  {
179.  	bwrite(fd, (genericptr_t) &oracle_cnt, sizeof oracle_cnt);
180.  	if (oracle_cnt)
181.  	    bwrite(fd, (genericptr_t) oracle_loc, oracle_cnt * sizeof (long));
182.  }
183.  
184.  void
185.  restore_oracles(fd)
186.  int fd;
187.  {
188.  	mread(fd, (genericptr_t) &oracle_cnt, sizeof oracle_cnt);
189.  	if (oracle_cnt) {
190.  	    oracle_loc = (long *) alloc(oracle_cnt * sizeof (long));
191.  	    mread(fd, (genericptr_t) oracle_loc, oracle_cnt * sizeof (long));
192.  	    oracle_flg = 1;	/* no need to call init_oracles() */
193.  	}
194.  }
195.  
196.  static void
197.  outoracle(special)
198.  boolean special;
199.  {
200.  	char	line[COLNO];
201.  	char	*endp;
202.  	dlb	*oracles;
203.  	int oracle_idx;
204.  	char xbuf[BUFSZ];
205.  
206.  	if(oracle_flg < 0 ||			/* couldn't open ORACLEFILE */
207.  	   (oracle_flg > 0 && oracle_cnt == 0))	/* oracles already exhausted */
208.  		return;
209.  
210.  	oracles = dlb_fopen(ORACLEFILE, "r");
211.  
212.  	if (oracles) {
213.  		winid tmpwin;
214.  		if (oracle_flg == 0) {	/* if this is the first outoracle() */
215.  			init_oracles(oracles);
216.  			oracle_flg = 1;
217.  			if (oracle_cnt == 0) return;
218.  		}
219.  		/* oracle_loc[0] is the special oracle;		*/
220.  		/* oracle_loc[1..oracle_cnt-1] are normal ones	*/
221.  		if (oracle_cnt <= 1 && !special) return;  /*(shouldn't happen)*/
222.  		oracle_idx = special ? 0 : rnd((int) oracle_cnt - 1);
223.  		(void) dlb_fseek(oracles, oracle_loc[oracle_idx], SEEK_SET);
224.  		if (!special) oracle_loc[oracle_idx] = oracle_loc[--oracle_cnt];
225.  
226.  		tmpwin = create_nhwindow(NHW_TEXT);
227.  		putstr(tmpwin, 0, special ?
228.  		      "The Oracle scornfully takes all your money and says:" :
229.  		      "The Oracle meditates for a moment and then intones:");
230.  		putstr(tmpwin, 0, "");
231.  
232.  		while(dlb_fgets(line, COLNO, oracles) && strcmp(line,"---\n")) {
233.  			if ((endp = index(line, '\n')) != 0) *endp = 0;
234.  			putstr(tmpwin, 0, xcrypt(line, xbuf));
235.  		}
236.  		display_nhwindow(tmpwin, TRUE);
237.  		destroy_nhwindow(tmpwin);
238.  		(void) dlb_fclose(oracles);
239.  	} else {
240.  		pline("Can't open oracles file!");
241.  		oracle_flg = -1;	/* don't try to open it again */
242.  	}
243.  }
244.  
245.  int
246.  doconsult(oracl)
247.  register struct monst *oracl;
248.  {
249.  	int u_pay, minor_cost = 50, major_cost = 500 + 50 * u.ulevel;
250.  	int add_xpts;
251.  	char qbuf[QBUFSZ];
252.  
253.  	multi = 0;
254.  
255.  	if (!oracl) {
256.  		pline("There is no one here to consult.");
257.  		return 0;
258.  	} else if (!oracl->mpeaceful) {
259.  		pline("%s is in no mood for consultations.", Monnam(oracl));
260.  		return 0;
261.  	} else if (!u.ugold) {
262.  		You("have no money.");
263.  		return 0;
264.  	}
265.  
266.  	Sprintf(qbuf,
267.  		"\"Wilt thou settle for a minor consultation?\" (%d zorkmids)",
268.  		minor_cost);
269.  	switch (ynq(qbuf)) {
270.  	    default:
271.  	    case 'q':
272.  		return 0;
273.  	    case 'y':
274.  		if (u.ugold < (long)minor_cost) {
275.  		    You("don't even have enough money for that!");
276.  		    return 0;
277.  		}
278.  		u_pay = minor_cost;
279.  		break;
280.  	    case 'n':
281.  		if (u.ugold <= (long)minor_cost ||	/* don't even ask */
282.  		    (oracle_cnt == 1 || oracle_flg < 0)) return 0;
283.  		Sprintf(qbuf,
284.  			"\"Then dost thou desire a major one?\" (%d zorkmids)",
285.  			major_cost);
286.  		if (yn(qbuf) != 'y') return 0;
287.  		u_pay = (u.ugold < (long)major_cost ? (int)u.ugold
288.  						    : major_cost);
289.  		break;
290.  	}
291.  	u.ugold -= (long)u_pay;
292.  	oracl->mgold += (long)u_pay;
293.  	flags.botl = 1;
294.  	add_xpts = 0;	/* first oracle of each type gives experience points */
295.  	if (u_pay == minor_cost) {
296.  		outrumor(1, FALSE);
297.  		if (!u.uevent.minor_oracle)
298.  		    add_xpts = u_pay / (u.uevent.major_oracle ? 25 : 10);
299.  		    /* 5 pts if very 1st, or 2 pts if major already done */
300.  		u.uevent.minor_oracle = TRUE;
301.  	} else {
302.  		boolean cheapskate = u_pay < major_cost;
303.  		outoracle(cheapskate);
304.  		if (!cheapskate && !u.uevent.major_oracle)
305.  		    add_xpts = u_pay / (u.uevent.minor_oracle ? 25 : 10);
306.  		    /* ~100 pts if very 1st, ~40 pts if minor already done */
307.  		u.uevent.major_oracle = TRUE;
308.  		exercise(A_WIS, !cheapskate);
309.  	}
310.  	if (add_xpts) {
311.  		more_experienced(add_xpts, u_pay/50);
312.  		newexplevel();
313.  	}
314.  	return 1;
315.  }
316.  
317.  /*rumors.c*/

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