1 /* SCCS Id: @(#)rumors.c 3.3 96/04/20 */
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 "lev.h"
7 #include "dlb.h"
8
9 /* [note: this comment is fairly old, but still accurate for 3.1]
10 * Rumors have been entirely rewritten to speed up the access. This is
11 * essential when working from floppies. Using fseek() the way that's done
12 * here means rumors following longer rumors are output more often than those
13 * following shorter rumors. Also, you may see the same rumor more than once
14 * in a particular game (although the odds are highly against it), but
15 * this also happens with real fortune cookies. -dgk
16 */
17
18 /* 3.1
19 * The rumors file consists of a "do not edit" line, a hexadecimal number
20 * giving the number of bytes of useful/true rumors, followed by those
21 * true rumors (one per line), followed by the useless/false/misleading/cute
22 * rumors (also one per line). Number of bytes of untrue rumors is derived
23 * via fseek(EOF)+ftell().
24 *
25 * The oracles file consists of a "do not edit" comment, a decimal count N
26 * and set of N+1 hexadecimal fseek offsets, followed by N multiple-line
27 * records, separated by "---" lines. The first oracle is a special case,
28 * and placed there by 'makedefs'.
29 */
30
31 STATIC_DCL void FDECL(init_rumors, (dlb *));
32 STATIC_DCL void FDECL(init_oracles, (dlb *));
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_OVL void
init_rumors(fp)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 /* exclude_cookie is a hack used because we sometimes want to get rumors in a
62 * context where messages such as "You swallowed the fortune!" that refer to
63 * cookies should not appear. This has no effect for true rumors since none
64 * of them contain such references anyway.
65 */
66 char *
getrumor(truth,rumor_buf,exclude_cookie)67 getrumor(truth, rumor_buf, exclude_cookie)
68 int truth; /* 1=true, -1=false, 0=either */
69 char *rumor_buf;
70 boolean exclude_cookie;
71 {
72 dlb *rumors;
73 long tidbit, beginning;
74 char *endp, line[BUFSZ], xbuf[BUFSZ];
75
76 rumor_buf[0] = '\0';
77 if (true_rumor_size < 0L) /* we couldn't open RUMORFILE */
78 return rumor_buf;
79
80 rumors = dlb_fopen(RUMORFILE, "r");
81
82 if (rumors) {
83 int count = 0;
84 int adjtruth;
85
86 do {
87 rumor_buf[0] = '\0';
88 if (true_rumor_size == 0L) { /* if this is 1st outrumor() */
89 init_rumors(rumors);
90 if (true_rumor_size < 0L) { /* init failed */
91 Sprintf(rumor_buf, "Error reading \"%.80s\".",
92 RUMORFILE);
93 return rumor_buf;
94 }
95 }
96 /*
97 * input: 1 0 -1
98 * rn2 \ +1 2=T 1=T 0=F
99 * adj./ +0 1=T 0=F -1=F
100 */
101 switch (adjtruth = truth + rn2(2)) {
102 case 2: /*(might let a bogus input arg sneak thru)*/
103 case 1: beginning = true_rumor_start;
104 tidbit = Rand() % true_rumor_size;
105 break;
106 case 0: /* once here, 0 => false rather than "either"*/
107 case -1: beginning = false_rumor_start;
108 tidbit = Rand() % false_rumor_size;
109 break;
110 default:
111 impossible("strange truth value for rumor");
112 return strcpy(rumor_buf, "Oops...");
113 }
114 (void) dlb_fseek(rumors, beginning + tidbit, SEEK_SET);
115 (void) dlb_fgets(line, sizeof line, rumors);
116 if (!dlb_fgets(line, sizeof line, rumors) ||
117 (adjtruth > 0 && dlb_ftell(rumors) > true_rumor_end)) {
118 /* reached end of rumors -- go back to beginning */
119 (void) dlb_fseek(rumors, beginning, SEEK_SET);
120 (void) dlb_fgets(line, sizeof line, rumors);
121 }
122 if ((endp = index(line, '\n')) != 0) *endp = 0;
123 Strcat(rumor_buf, xcrypt(line, xbuf));
124 } while(count++ < 50 && exclude_cookie && (strstri(rumor_buf, "fortune") || strstri(rumor_buf, "pity")));
125 (void) dlb_fclose(rumors);
126 if (count >= 50)
127 impossible("Can't find non-cookie rumor?");
128 else
129 exercise(A_WIS, (adjtruth > 0));
130 } else {
131 pline("Can't open rumors file!");
132 true_rumor_size = -1; /* don't try to open it again */
133 }
134 return rumor_buf;
135 }
136
137 void
outrumor(truth,mechanism)138 outrumor(truth, mechanism)
139 int truth; /* 1=true, -1=false, 0=either */
140 int mechanism;
141 {
142 static const char fortune_msg[] =
143 "This cookie has a scrap of paper inside.";
144 const char *line;
145 char buf[BUFSZ];
146 boolean reading = (mechanism == BY_COOKIE ||
147 mechanism == BY_PAPER);
148
149 if (reading && Blind) {
150 if (mechanism == BY_COOKIE)
151 pline(fortune_msg);
152 pline("What a pity that you cannot read it!");
153 return;
154 }
155 line = getrumor(truth, buf, reading ? FALSE : TRUE);
156 if (!*line)
157 line = "NetHack rumors file closed for renovation.";
158 switch (mechanism) {
159 case BY_ORACLE:
160 /* Oracle delivers the rumor */
161 pline("True to her word, the Oracle %ssays: ",
162 (!rn2(4) ? "offhandedly " : (!rn2(3) ? "casually " :
163 (rn2(2) ? "nonchalantly " : ""))));
164 verbalize("%s", line);
165 exercise(A_WIS, TRUE);
166 return;
167 case BY_COOKIE:
168 pline(fortune_msg);
169 /* FALLTHRU */
170 case BY_PAPER:
171 pline("It reads:");
172 break;
173 }
174 pline("%s", line);
175 }
176
177 STATIC_OVL void
init_oracles(fp)178 init_oracles(fp)
179 dlb *fp;
180 {
181 register int i;
182 char line[BUFSZ];
183 int cnt = 0;
184
185 /* this assumes we're only called once */
186 (void) dlb_fgets(line, sizeof line, fp); /* skip "don't edit" comment*/
187 (void) dlb_fgets(line, sizeof line, fp);
188 if (sscanf(line, "%5d\n", &cnt) == 1 && cnt > 0) {
189 oracle_cnt = (unsigned) cnt;
190 oracle_loc = (long *) alloc((unsigned)cnt * sizeof (long));
191 for (i = 0; i < cnt; i++) {
192 (void) dlb_fgets(line, sizeof line, fp);
193 (void) sscanf(line, "%5lx\n", &oracle_loc[i]);
194 }
195 }
196 return;
197 }
198
199 void
save_oracles(fd,mode)200 save_oracles(fd, mode)
201 int fd, mode;
202 {
203 if (perform_bwrite(mode)) {
204 bwrite(fd, (genericptr_t) &oracle_cnt, sizeof oracle_cnt);
205 if (oracle_cnt)
206 bwrite(fd, (genericptr_t)oracle_loc, oracle_cnt*sizeof (long));
207 }
208 if (release_data(mode)) {
209 if (oracle_cnt) {
210 free((genericptr_t)oracle_loc);
211 oracle_loc = 0, oracle_cnt = 0, oracle_flg = 0;
212 }
213 }
214 }
215
216 void
restore_oracles(fd)217 restore_oracles(fd)
218 int fd;
219 {
220 mread(fd, (genericptr_t) &oracle_cnt, sizeof oracle_cnt);
221 if (oracle_cnt) {
222 oracle_loc = (long *) alloc(oracle_cnt * sizeof (long));
223 mread(fd, (genericptr_t) oracle_loc, oracle_cnt * sizeof (long));
224 oracle_flg = 1; /* no need to call init_oracles() */
225 }
226 }
227
228 void
outoracle(special,delphi)229 outoracle(special, delphi)
230 boolean special;
231 boolean delphi;
232 {
233 char line[COLNO];
234 char *endp;
235 dlb *oracles;
236 int oracle_idx;
237 char xbuf[BUFSZ];
238
239 if(oracle_flg < 0 || /* couldn't open ORACLEFILE */
240 (oracle_flg > 0 && oracle_cnt == 0)) /* oracles already exhausted */
241 return;
242
243 oracles = dlb_fopen(ORACLEFILE, "r");
244
245 if (oracles) {
246 winid tmpwin;
247 if (oracle_flg == 0) { /* if this is the first outoracle() */
248 init_oracles(oracles);
249 oracle_flg = 1;
250 if (oracle_cnt == 0) return;
251 }
252 /* oracle_loc[0] is the special oracle; */
253 /* oracle_loc[1..oracle_cnt-1] are normal ones */
254 if (oracle_cnt <= 1 && !special) return; /*(shouldn't happen)*/
255 oracle_idx = special ? 0 : rnd((int) oracle_cnt - 1);
256 (void) dlb_fseek(oracles, oracle_loc[oracle_idx], SEEK_SET);
257 if (!special) oracle_loc[oracle_idx] = oracle_loc[--oracle_cnt];
258
259 tmpwin = create_nhwindow(NHW_TEXT);
260 if (delphi)
261 putstr(tmpwin, 0, special ?
262 "The Oracle scornfully takes all your money and says:" :
263 "The Oracle meditates for a moment and then intones:");
264 else
265 putstr(tmpwin, 0, "The message reads:");
266 putstr(tmpwin, 0, "");
267
268 while(dlb_fgets(line, COLNO, oracles) && strcmp(line,"---\n")) {
269 if ((endp = index(line, '\n')) != 0) *endp = 0;
270 putstr(tmpwin, 0, xcrypt(line, xbuf));
271 }
272 display_nhwindow(tmpwin, TRUE);
273 destroy_nhwindow(tmpwin);
274 (void) dlb_fclose(oracles);
275 } else {
276 pline("Can't open oracles file!");
277 oracle_flg = -1; /* don't try to open it again */
278 }
279 }
280
281 int
doconsult(oracl)282 doconsult(oracl)
283 register struct monst *oracl;
284 {
285 int u_pay, minor_cost = 50, major_cost = 500 + 50 * u.ulevel;
286 int add_xpts;
287 char qbuf[QBUFSZ];
288
289 multi = 0;
290
291 if (!oracl) {
292 There("is no one here to consult.");
293 return 0;
294 } else if (!oracl->mpeaceful) {
295 pline("%s is in no mood for consultations.", Monnam(oracl));
296 return 0;
297 } else if (!u.ugold) {
298 You("have no money.");
299 return 0;
300 }
301
302 Sprintf(qbuf,
303 "\"Wilt thou settle for a minor consultation?\" (%d zorkmids)",
304 minor_cost);
305 switch (ynq(qbuf)) {
306 default:
307 case 'q':
308 return 0;
309 case 'y':
310 if (u.ugold < (long)minor_cost) {
311 You("don't even have enough money for that!");
312 return 0;
313 }
314 u_pay = minor_cost;
315 break;
316 case 'n':
317 if (u.ugold <= (long)minor_cost || /* don't even ask */
318 (oracle_cnt == 1 || oracle_flg < 0)) return 0;
319 Sprintf(qbuf,
320 "\"Then dost thou desire a major one?\" (%d zorkmids)",
321 major_cost);
322 if (yn(qbuf) != 'y') return 0;
323 u_pay = (u.ugold < (long)major_cost ? (int)u.ugold
324 : major_cost);
325 break;
326 }
327 u.ugold -= (long)u_pay;
328 oracl->mgold += (long)u_pay;
329 flags.botl = 1;
330 add_xpts = 0; /* first oracle of each type gives experience points */
331 if (u_pay == minor_cost) {
332 outrumor(1, BY_ORACLE);
333 if (!u.uevent.minor_oracle)
334 add_xpts = u_pay / (u.uevent.major_oracle ? 25 : 10);
335 /* 5 pts if very 1st, or 2 pts if major already done */
336 u.uevent.minor_oracle = TRUE;
337 } else {
338 boolean cheapskate = u_pay < major_cost;
339 outoracle(cheapskate, TRUE);
340 if (!cheapskate && !u.uevent.major_oracle)
341 add_xpts = u_pay / (u.uevent.minor_oracle ? 25 : 10);
342 /* ~100 pts if very 1st, ~40 pts if minor already done */
343 u.uevent.major_oracle = TRUE;
344 exercise(A_WIS, !cheapskate);
345 }
346 if (add_xpts) {
347 more_experienced(add_xpts, u_pay/50);
348 newexplevel();
349 }
350 return 1;
351 }
352
353 /*rumors.c*/
354