games: Fix real bugs on three games (found by gcc 5.0)
[dragonfly.git] / games / mille / move.c
1 /*-
2  * Copyright (c) 1983, 1993
3  *      The Regents of the University of California.  All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in the
12  *    documentation and/or other materials provided with the distribution.
13  * 3. Neither the name of the University nor the names of its contributors
14  *    may be used to endorse or promote products derived from this software
15  *    without specific prior written permission.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27  * SUCH DAMAGE.
28  *
29  * @(#)move.c   8.1 (Berkeley) 5/31/93
30  * $FreeBSD: src/games/mille/move.c,v 1.6 1999/12/12 06:17:24 billf Exp $
31  * $DragonFly: src/games/mille/move.c,v 1.5 2006/08/27 17:17:23 pavalos Exp $
32  */
33
34 #include <termios.h>
35
36 #include "mille.h"
37 #include <unctrl.h>
38 #include <term.h>
39
40 /*
41  * @(#)move.c   1.2 (Berkeley) 3/28/83
42  */
43
44 #undef  CTRL
45 #define CTRL(c)         (c - 'A' + 1)
46
47 const char      *Movenames[] = {
48                 "M_DISCARD", "M_DRAW", "M_PLAY", "M_ORDER"
49         };
50
51 static void check_go(void);
52 static void getmove(void);
53 static int haspicked(PLAY *);
54 static bool playcard(PLAY *);
55
56 void
57 domove(void)
58 {
59         PLAY    *pp;
60         int     i, j;
61         bool    goodplay;
62
63         pp = &Player[Play];
64         if (Play == PLAYER)
65                 getmove();
66         else
67                 calcmove();
68         Next = FALSE;
69         goodplay = TRUE;
70         switch (Movetype) {
71           case M_DISCARD:
72                 if (haspicked(pp)) {
73                         if (pp->hand[Card_no] == C_INIT)
74                                 if (Card_no == 6)
75                                         Finished = TRUE;
76                                 else
77                                         error("no card there");
78                         else {
79                                 if (issafety(pp->hand[Card_no])) {
80                                         error("discard a safety?");
81                                         goodplay = FALSE;
82                                         break;
83                                 }
84                                 Discard = pp->hand[Card_no];
85                                 pp->hand[Card_no] = C_INIT;
86                                 Next = TRUE;
87                                 if (Play == PLAYER)
88                                         account(Discard);
89                         }
90                 }
91                 else
92                         error("must pick first");
93                 break;
94           case M_PLAY:
95                 goodplay = playcard(pp);
96                 break;
97           case M_DRAW:
98                 Card_no = 0;
99                 if (Topcard <= Deck)
100                         error("no more cards");
101                 else if (haspicked(pp))
102                         error("already picked");
103                 else {
104                         pp->hand[0] = *--Topcard;
105 #ifdef DEBUG
106                         if (Debug)
107                                 fprintf(outf, "DOMOVE: Draw %s\n", C_name[*Topcard]);
108 #endif
109 acc:
110                         if (Play == COMP) {
111                                 account(*Topcard);
112                                 if (issafety(*Topcard))
113                                         pp->safety[*Topcard-S_CONV] = S_IN_HAND;
114                         }
115                         if (pp->hand[1] == C_INIT && Topcard > Deck) {
116                                 Card_no = 1;
117                                 pp->hand[1] = *--Topcard;
118 #ifdef DEBUG
119                                 if (Debug)
120                                         fprintf(outf, "DOMOVE: Draw %s\n", C_name[*Topcard]);
121 #endif
122                                 goto acc;
123                         }
124                         pp->new_battle = FALSE;
125                         pp->new_speed = FALSE;
126                 }
127                 break;
128
129           case M_ORDER:
130                 break;
131         }
132         /*
133          * move blank card to top by one of two methods.  If the
134          * computer's hand was sorted, the randomness for picking
135          * between equally valued cards would be lost
136          */
137         if (Order && Movetype != M_DRAW && goodplay && pp == &Player[PLAYER])
138                 sort(pp->hand);
139         else
140                 for (i = 1; i < HAND_SZ; i++)
141                         if (pp->hand[i] == C_INIT) {
142                                 for (j = 0; pp->hand[j] == C_INIT; j++)
143                                         if (j == HAND_SZ - 1) {
144                                                 j = 0;
145                                                 break;
146                                         }
147                                 pp->hand[i] = pp->hand[j];
148                                 pp->hand[j] = C_INIT;
149                         }
150         if (Topcard <= Deck)
151                 check_go();
152         if (Next)
153                 nextplay();
154 }
155
156 /*
157  *      Check and see if either side can go.  If they cannot,
158  * the game is over
159  */
160 static void
161 check_go(void)
162 {
163         CARD    card;
164         PLAY    *pp, *op;
165         int     i;
166
167         for (pp = Player; pp < &Player[2]; pp++) {
168                 op = (pp == &Player[COMP] ? &Player[PLAYER] : &Player[COMP]);
169                 for (i = 0; i < HAND_SZ; i++) {
170                         card = pp->hand[i];
171                         if (issafety(card) || canplay(pp, op, card)) {
172 #ifdef DEBUG
173                                 if (Debug) {
174                                         fprintf(outf, "CHECK_GO: can play %s (%d), ", C_name[card], card);
175                                         fprintf(outf, "issafety(card) = %d, ", issafety(card));
176                                         fprintf(outf, "canplay(pp, op, card) = %d\n", canplay(pp, op, card));
177                                 }
178 #endif
179                                 return;
180                         }
181 #ifdef DEBUG
182                         else if (Debug)
183                                 fprintf(outf, "CHECK_GO: cannot play %s\n",
184                                     C_name[card]);
185 #endif
186                 }
187         }
188         Finished = TRUE;
189 }
190
191 static bool
192 playcard(PLAY *pp)
193 {
194         int     v;
195         CARD    card;
196         bool    blockNext;
197
198         /*
199          * check and see if player has picked
200          */
201         switch (pp->hand[Card_no]) {
202           default:
203                 if (!haspicked(pp))
204 mustpick:
205                         return error("must pick first");
206           case C_GAS_SAFE:      case C_SPARE_SAFE:
207           case C_DRIVE_SAFE:    case C_RIGHT_WAY:
208                 break;
209         }
210
211         card = pp->hand[Card_no];
212 #ifdef DEBUG
213         if (Debug)
214                 fprintf(outf, "PLAYCARD: Card = %s\n", C_name[card]);
215 #endif
216         blockNext = FALSE;
217         switch (card) {
218           case C_200:
219                 if (pp->nummiles[C_200] == 2)
220                         return error("only two 200's per hand");
221           case C_100:   case C_75:
222                 if (pp->speed == C_LIMIT)
223                         return error("limit of 50");
224           case C_50:
225                 if (pp->mileage + Value[card] > End)
226                         return error("puts you over %d", End);
227           case C_25:
228                 if (!pp->can_go)
229                         return error("cannot move now");
230                 pp->nummiles[card]++;
231                 v = Value[card];
232                 pp->total += v;
233                 pp->hand_tot += v;
234                 if ((pp->mileage += v) == End)
235                         check_ext(FALSE);
236                 break;
237
238           case C_GAS:   case C_SPARE:   case C_REPAIRS:
239                 if (pp->battle != opposite(card))
240                         return error("can't play \"%s\"", C_name[card]);
241                 pp->battle = card;
242                 if (pp->safety[S_RIGHT_WAY] == S_PLAYED)
243                         pp->can_go = TRUE;
244                 break;
245
246           case C_GO:
247                 if (pp->battle != C_INIT && pp->battle != C_STOP
248                     && !isrepair(pp->battle))
249                         return error("cannot play \"Go\" on a \"%s\"",
250                             C_name[pp->battle]);
251                 pp->battle = C_GO;
252                 pp->can_go = TRUE;
253                 break;
254
255           case C_END_LIMIT:
256                 if (pp->speed != C_LIMIT)
257                         return error("not limited");
258                 pp->speed = C_END_LIMIT;
259                 break;
260
261           case C_EMPTY: case C_FLAT:    case C_CRASH:
262           case C_STOP:
263                 pp = &Player[other(Play)];
264                 if (!pp->can_go)
265                         return error("opponent cannot go");
266                 else if (pp->safety[safety(card) - S_CONV] == S_PLAYED)
267 protected:
268                         return error("opponent is protected");
269                 pp->battle = card;
270                 pp->new_battle = TRUE;
271                 pp->can_go = FALSE;
272                 pp = &Player[Play];
273                 break;
274
275           case C_LIMIT:
276                 pp = &Player[other(Play)];
277                 if (pp->speed == C_LIMIT)
278                         return error("opponent has limit");
279                 if (pp->safety[S_RIGHT_WAY] == S_PLAYED)
280                         goto protected;
281                 pp->speed = C_LIMIT;
282                 pp->new_speed = TRUE;
283                 pp = &Player[Play];
284                 break;
285
286           case C_GAS_SAFE:      case C_SPARE_SAFE:
287           case C_DRIVE_SAFE:    case C_RIGHT_WAY:
288                 if (pp->battle == opposite(card)
289                     || (card == C_RIGHT_WAY && pp->speed == C_LIMIT)) {
290                         if (!(card == C_RIGHT_WAY && !isrepair(pp->battle))) {
291                                 pp->battle = C_GO;
292                                 pp->can_go = TRUE;
293                         }
294                         if (card == C_RIGHT_WAY && pp->speed == C_LIMIT)
295                                 pp->speed = C_INIT;
296                         if (pp->new_battle
297                             || (pp->new_speed && card == C_RIGHT_WAY)) {
298                                 pp->coups[card - S_CONV] = TRUE;
299                                 pp->total += SC_COUP;
300                                 pp->hand_tot += SC_COUP;
301                                 pp->coupscore += SC_COUP;
302                         }
303                 }
304                 /*
305                  * if not coup, must pick first
306                  */
307                 else if (pp->hand[0] == C_INIT && Topcard > Deck)
308                         goto mustpick;
309                 pp->safety[card - S_CONV] = S_PLAYED;
310                 pp->total += SC_SAFETY;
311                 pp->hand_tot += SC_SAFETY;
312                 if ((pp->safescore += SC_SAFETY) == NUM_SAFE * SC_SAFETY) {
313                         pp->total += SC_ALL_SAFE;
314                         pp->hand_tot += SC_ALL_SAFE;
315                 }
316                 if (card == C_RIGHT_WAY) {
317                         if (pp->speed == C_LIMIT)
318                                 pp->speed = C_INIT;
319                         if (pp->battle == C_STOP || pp->battle == C_INIT) {
320                                 pp->can_go = TRUE;
321                                 pp->battle = C_INIT;
322                         }
323                         if (!pp->can_go && isrepair(pp->battle))
324                                 pp->can_go = TRUE;
325                 }
326                 blockNext = TRUE;
327                 break;
328
329           case C_INIT:
330                 error("no card there");
331                 blockNext = TRUE;
332                 break;
333         }
334         if (pp == &Player[PLAYER])
335                 account(card);
336         pp->hand[Card_no] = C_INIT;
337         Next = !blockNext;
338         return TRUE;
339 }
340
341 static void
342 getmove(void)
343 {
344         char    c;
345 #ifdef DEBUG
346         char    *sp;
347 #endif
348 #ifdef EXTRAP
349         static bool     last_ex = FALSE;        /* set if last command was E */
350
351         if (last_ex) {
352                 undoex();
353                 prboard();
354                 last_ex = FALSE;
355         }
356 #endif
357         for (;;) {
358                 prompt(MOVEPROMPT);
359                 leaveok(Board, FALSE);
360                 refresh();
361                 while ((c = readch()) == killchar() || c == erasechar())
362                         continue;
363                 if (islower(c))
364                         c = toupper(c);
365                 if (isprint(c) && !isspace(c)) {
366                         addch(c);
367                         refresh();
368                 }
369                 switch (c) {
370                   case 'P':             /* Pick */
371                         Movetype = M_DRAW;
372                         goto ret;
373                   case 'U':             /* Use Card */
374                   case 'D':             /* Discard Card */
375                         if ((Card_no = getcard()) < 0)
376                                 break;
377                         Movetype = (c == 'U' ? M_PLAY : M_DISCARD);
378                         goto ret;
379                   case 'O':             /* Order */
380                         Order = !Order;
381                         if (Window == W_SMALL) {
382                                 if (!Order)
383                                         mvwaddstr(Score, 12, 21,
384                                                   "o: order hand");
385                                 else
386                                         mvwaddstr(Score, 12, 21,
387                                                   "o: stop ordering");
388                                 wclrtoeol(Score);
389                         }
390                         Movetype = M_ORDER;
391                         goto ret;
392                   case 'Q':             /* Quit */
393                         rub(0);         /* Same as a rubout */
394                         break;
395                   case 'W':             /* Window toggle */
396                         Window = nextwin(Window);
397                         newscore();
398                         prscore(TRUE);
399                         wrefresh(Score);
400                         break;
401                   case 'R':             /* Redraw screen */
402                   case CTRL('L'):
403                         wrefresh(curscr);
404                         break;
405                   case 'S':             /* Save game */
406                         On_exit = FALSE;
407                         save();
408                         break;
409                   case 'E':             /* Extrapolate */
410 #ifdef EXTRAP
411                         if (last_ex)
412                                 break;
413                         Finished = TRUE;
414                         if (Window != W_FULL)
415                                 newscore();
416                         prscore(FALSE);
417                         wrefresh(Score);
418                         last_ex = TRUE;
419                         Finished = FALSE;
420 #else
421                         error("%c: command not implemented", c);
422 #endif
423                         break;
424                   case '\r':            /* Ignore RETURNs and   */
425                   case '\n':            /* Line Feeds           */
426                   case ' ':             /* Spaces               */
427                   case '\0':            /* and nulls            */
428                         break;
429 #ifdef DEBUG
430                   case 'Z':             /* Debug code */
431                         if (!Debug && outf == NULL) {
432                                 char    buf[MAXPATHLEN];
433
434                                 prompt(FILEPROMPT);
435                                 leaveok(Board, FALSE);
436                                 refresh();
437                                 sp = buf;
438                                 while ((*sp = readch()) != '\n') {
439                                         if (*sp == killchar())
440                                                 goto over;
441                                         else if (*sp == erasechar()) {
442                                                 if (--sp < buf)
443                                                         sp = buf;
444                                                 else {
445                                                         addch('\b');
446                                                         if (*sp < ' ')
447                                                             addch('\b');
448                                                         clrtoeol();
449                                                 }
450                                         }
451                                         else
452                                                 addstr(unctrl(*sp++));
453                                         refresh();
454                                 }
455                                 *sp = '\0';
456                                 leaveok(Board, TRUE);
457                                 if ((outf = fopen(buf, "w")) == NULL)
458                                         perror(buf);
459                                 setbuf(outf, NULL);
460                         }
461                         Debug = !Debug;
462                         break;
463 #endif
464                   default:
465                         error("unknown command: %s", unctrl(c));
466                         break;
467                 }
468         }
469 ret:
470         leaveok(Board, TRUE);
471 }
472
473 /*
474  * return whether or not the player has picked
475  */
476 static int
477 haspicked(PLAY *pp)
478 {
479         int     card;
480
481         if (Topcard <= Deck)
482                 return TRUE;
483         switch (pp->hand[Card_no]) {
484           case C_GAS_SAFE:      case C_SPARE_SAFE:
485           case C_DRIVE_SAFE:    case C_RIGHT_WAY:
486                 card = 1;
487                 break;
488           default:
489                 card = 0;
490                 break;
491         }
492         return (pp->hand[card] != C_INIT);
493 }
494
495 void
496 account(CARD card)
497 {
498         CARD    oppos;
499
500         if (card == C_INIT)
501                 return;
502         ++Numseen[card];
503         if (Play == COMP)
504                 switch (card) {
505                   case C_GAS_SAFE:
506                   case C_SPARE_SAFE:
507                   case C_DRIVE_SAFE:
508                         oppos = opposite(card);
509                         Numgos += Numcards[oppos] - Numseen[oppos];
510                         break;
511                   case C_CRASH:
512                   case C_FLAT:
513                   case C_EMPTY:
514                   case C_STOP:
515                         Numgos++;
516                         break;
517                 }
518 }
519
520 void
521 prompt(int promptno)
522 {
523         static const char       *names[] = {
524                                 ">>:Move:",
525                                 "Really?",
526                                 "Another hand?",
527                                 "Another game?",
528                                 "Save game?",
529                                 "Same file?",
530                                 "file:",
531                                 "Extension?",
532                                 "Overwrite file?",
533                         };
534         static int      last_prompt = -1;
535
536         if (promptno == last_prompt)
537                 move(MOVE_Y, MOVE_X + strlen(names[promptno]) + 1);
538         else {
539                 move(MOVE_Y, MOVE_X);
540                 if (promptno == MOVEPROMPT)
541                         standout();
542                 addstr(names[promptno]);
543                 if (promptno == MOVEPROMPT)
544                         standend();
545                 addch(' ');
546                 last_prompt = promptno;
547         }
548         clrtoeol();
549 }
550
551 void
552 sort(CARD *hand)
553 {
554         CARD    *cp, *tp;
555         CARD    temp;
556
557         cp = hand;
558         hand += HAND_SZ;
559         for ( ; cp < &hand[-1]; cp++)
560                 for (tp = cp + 1; tp < hand; tp++)
561                         if (*cp > *tp) {
562                                 temp = *cp;
563                                 *cp = *tp;
564                                 *tp = temp;
565                         }
566 }