games/rogue/save.c

   1 /*-
   2  * Copyright (c) 1988, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * This code is derived from software contributed to Berkeley by
   6  * Timothy C. Stoehr.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. Neither the name of the University nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  *
  32  * @(#)save.c   8.1 (Berkeley) 5/31/93
  33  * $FreeBSD: src/games/rogue/save.c,v 1.6 1999/11/30 03:49:27 billf Exp $
  34  * $DragonFly: src/games/rogue/save.c,v 1.4 2006/09/02 19:31:07 pavalos Exp $
  35  */
  36
  37 /*
  38  * save.c
  39  *
  40  * This source herein may be modified and/or distributed by anybody who
  41  * so desires, with the following restrictions:
  42  *    1.)  No portion of this notice shall be removed.
  43  *    2.)  Credit shall not be taken for the creation of this source.
  44  *    3.)  This code is not to be traded, sold, or used for personal
  45  *         gain or profit.
  46  *
  47  */
  48
  49 #include <stdio.h>
  50 #include <unistd.h>
  51 #include "rogue.h"
  52
  53 extern short cur_level, max_level;
  54 extern short party_room;
  55 extern short foods;
  56 extern boolean is_wood[];
  57 extern short cur_room;
  58 extern boolean being_held;
  59 extern short bear_trap;
  60 extern short halluc;
  61 extern short blind;
  62 extern short confused;
  63 extern short levitate;
  64 extern short haste_self;
  65 extern boolean see_invisible;
  66 extern boolean detect_monster;
  67 extern boolean wizard;
  68 extern boolean score_only;
  69 extern short m_moves;
  70
  71 extern boolean msg_cleared;
  72
  73 static boolean  has_been_touched(const struct rogue_time *,
  74                          const struct rogue_time *);
  75 static void     del_save_file(void);
  76 static void     r_read(FILE *, char *, int);
  77 static void     r_write(FILE *, const char *, int);
  78 static void     read_pack(object *, FILE *, boolean);
  79 static void     read_string(char *, FILE *, size_t);
  80 static void     rw_dungeon(FILE *, boolean);
  81 static void     rw_id(struct id *, FILE *, int, boolean);
  82 static void     rw_rooms(FILE *, boolean);
  83 static void     write_pack(const object *, FILE *);
  84 static void     write_string(char *, FILE *);
  85
  86 short write_failed = 0;
  87 char *save_file = NULL;
  88 static char save_name[80];
  89
  90 void
  91 save_game(void)
  92 {
  93         char fname[64];
  94
  95         if (!get_input_line("file name?", save_file, fname,
  96                         "game not saved", 0, 1)) {
  97                 return;
  98         }
  99         check_message();
 100         message(fname, 0);
 101         save_into_file(fname);
 102 }
 103
 104 void
 105 save_into_file(const char *sfile)
 106 {
 107         FILE *fp;
 108         int file_id;
 109         char *name_buffer;
 110         size_t len;
 111         char *hptr;
 112         struct rogue_time rt_buf;
 113
 114         if (sfile[0] == '~') {
 115                 if ((hptr = md_getenv("HOME")) != NULL) {
 116                         len = strlen(hptr) + strlen(sfile);
 117                         name_buffer = md_malloc(len);
 118                         if (name_buffer == NULL) {
 119                                 message("out of memory for save file name", 0);
 120                                 sfile = error_file;
 121                         } else {
 122                                 strcpy(name_buffer, hptr);
 123                                 strcat(name_buffer, sfile+1);
 124                                 sfile = name_buffer;
 125                         }
 126
 127                 }
 128         }
 129         /* revoke */
 130         setgid(getgid());
 131         if (    ((fp = fopen(sfile, "w")) == NULL) ||
 132                         ((file_id = md_get_file_id(sfile)) == -1)) {
 133                 message("problem accessing the save file", 0);
 134                 return;
 135         }
 136         md_ignore_signals();
 137         write_failed = 0;
 138         xxx(1);
 139         r_write(fp, (char *) &detect_monster, sizeof(detect_monster));
 140         r_write(fp, (char *) &cur_level, sizeof(cur_level));
 141         r_write(fp, (char *) &max_level, sizeof(max_level));
 142         write_string(hunger_str, fp);
 143         write_string(login_name, fp);
 144         r_write(fp, (char *) &party_room, sizeof(party_room));
 145         write_pack(&level_monsters, fp);
 146         write_pack(&level_objects, fp);
 147         r_write(fp, (char *) &file_id, sizeof(file_id));
 148         rw_dungeon(fp, 1);
 149         r_write(fp, (char *) &foods, sizeof(foods));
 150         r_write(fp, (char *) &rogue, sizeof(fighter));
 151         write_pack(&rogue.pack, fp);
 152         rw_id(id_potions, fp, POTIONS, 1);
 153         rw_id(id_scrolls, fp, SCROLS, 1);
 154         rw_id(id_wands, fp, WANDS, 1);
 155         rw_id(id_rings, fp, RINGS, 1);
 156         r_write(fp, (char *) traps, (MAX_TRAPS * sizeof(trap)));
 157         r_write(fp, (char *) is_wood, (WANDS * sizeof(boolean)));
 158         r_write(fp, (char *) &cur_room, sizeof(cur_room));
 159         rw_rooms(fp, 1);
 160         r_write(fp, (char *) &being_held, sizeof(being_held));
 161         r_write(fp, (char *) &bear_trap, sizeof(bear_trap));
 162         r_write(fp, (char *) &halluc, sizeof(halluc));
 163         r_write(fp, (char *) &blind, sizeof(blind));
 164         r_write(fp, (char *) &confused, sizeof(confused));
 165         r_write(fp, (char *) &levitate, sizeof(levitate));
 166         r_write(fp, (char *) &haste_self, sizeof(haste_self));
 167         r_write(fp, (char *) &see_invisible, sizeof(see_invisible));
 168         r_write(fp, (char *) &detect_monster, sizeof(detect_monster));
 169         r_write(fp, (char *) &wizard, sizeof(wizard));
 170         r_write(fp, (char *) &score_only, sizeof(score_only));
 171         r_write(fp, (char *) &m_moves, sizeof(m_moves));
 172         md_gct(&rt_buf);
 173         rt_buf.second += 10;            /* allow for some processing time */
 174         r_write(fp, (char *) &rt_buf, sizeof(rt_buf));
 175         fclose(fp);
 176
 177         if (write_failed) {
 178                 md_df(sfile);   /* delete file */
 179         } else {
 180                 if (strcmp(sfile, save_name) == 0)
 181                         save_name[0] = 0;
 182                 clean_up("");
 183         }
 184 }
 185
 186 static void
 187 del_save_file(void)
 188 {
 189         if (!save_name[0])
 190                 return;
 191         /* revoke */
 192         setgid(getgid());
 193         md_df(save_name);
 194 }
 195
 196 void
 197 restore(const char *fname)
 198 {
 199         FILE *fp = NULL;
 200         struct rogue_time saved_time, mod_time;
 201         char buf[4];
 202         char tbuf[40];
 203         int new_file_id, saved_file_id;
 204
 205         if (    ((new_file_id = md_get_file_id(fname)) == -1) ||
 206                         ((fp = fopen(fname, "r")) == NULL)) {
 207                 clean_up("cannot open file");
 208         }
 209         if (md_link_count(fname) > 1) {
 210                 clean_up("file has link");
 211         }
 212         xxx(1);
 213         r_read(fp, (char *) &detect_monster, sizeof(detect_monster));
 214         r_read(fp, (char *) &cur_level, sizeof(cur_level));
 215         r_read(fp, (char *) &max_level, sizeof(max_level));
 216         read_string(hunger_str, fp, sizeof hunger_str);
 217
 218         strlcpy(tbuf, login_name, sizeof tbuf);
 219         read_string(login_name, fp, sizeof login_name);
 220         if (strcmp(tbuf, login_name)) {
 221                 clean_up("you're not the original player");
 222         }
 223
 224         r_read(fp, (char *) &party_room, sizeof(party_room));
 225         read_pack(&level_monsters, fp, 0);
 226         read_pack(&level_objects, fp, 0);
 227         r_read(fp, (char *) &saved_file_id, sizeof(saved_file_id));
 228         if (new_file_id != saved_file_id) {
 229                 clean_up("sorry, saved game is not in the same file");
 230         }
 231         rw_dungeon(fp, 0);
 232         r_read(fp, (char *) &foods, sizeof(foods));
 233         r_read(fp, (char *) &rogue, sizeof(fighter));
 234         read_pack(&rogue.pack, fp, 1);
 235         rw_id(id_potions, fp, POTIONS, 0);
 236         rw_id(id_scrolls, fp, SCROLS, 0);
 237         rw_id(id_wands, fp, WANDS, 0);
 238         rw_id(id_rings, fp, RINGS, 0);
 239         r_read(fp, (char *) traps, (MAX_TRAPS * sizeof(trap)));
 240         r_read(fp, (char *) is_wood, (WANDS * sizeof(boolean)));
 241         r_read(fp, (char *) &cur_room, sizeof(cur_room));
 242         rw_rooms(fp, 0);
 243         r_read(fp, (char *) &being_held, sizeof(being_held));
 244         r_read(fp, (char *) &bear_trap, sizeof(bear_trap));
 245         r_read(fp, (char *) &halluc, sizeof(halluc));
 246         r_read(fp, (char *) &blind, sizeof(blind));
 247         r_read(fp, (char *) &confused, sizeof(confused));
 248         r_read(fp, (char *) &levitate, sizeof(levitate));
 249         r_read(fp, (char *) &haste_self, sizeof(haste_self));
 250         r_read(fp, (char *) &see_invisible, sizeof(see_invisible));
 251         r_read(fp, (char *) &detect_monster, sizeof(detect_monster));
 252         r_read(fp, (char *) &wizard, sizeof(wizard));
 253         r_read(fp, (char *) &score_only, sizeof(score_only));
 254         r_read(fp, (char *) &m_moves, sizeof(m_moves));
 255         r_read(fp, (char *) &saved_time, sizeof(saved_time));
 256
 257         if (fread(buf, sizeof(char), 1, fp) > 0) {
 258                 clear();
 259                 clean_up("extra characters in file");
 260         }
 261
 262         md_gfmt(fname, &mod_time);      /* get file modification time */
 263
 264         if (has_been_touched(&saved_time, &mod_time)) {
 265                 clear();
 266                 clean_up("sorry, file has been touched");
 267         }
 268         if ((!wizard)) {
 269                 strcpy(save_name, fname);
 270                 atexit(del_save_file);
 271         }
 272         msg_cleared = 0;
 273         ring_stats(0);
 274         fclose(fp);
 275 }
 276
 277 static void
 278 write_pack(const object *pack, FILE *fp)
 279 {
 280         object t;
 281
 282         while ((pack = pack->next_object) != NULL) {
 283                 r_write(fp, (const char *) pack, sizeof(object));
 284         }
 285         t.ichar = t.what_is = 0;
 286         r_write(fp, (const char *) &t, sizeof(object));
 287 }
 288
 289 static void
 290 read_pack(object *pack, FILE *fp, boolean is_rogue)
 291 {
 292         object read_obj, *new_obj;
 293
 294         for (;;) {
 295                 r_read(fp, (char *) &read_obj, sizeof(object));
 296                 if (read_obj.ichar == 0) {
 297                         pack->next_object = NULL;
 298                         break;
 299                 }
 300                 new_obj = alloc_object();
 301                 *new_obj = read_obj;
 302                 if (is_rogue) {
 303                         if (new_obj->in_use_flags & BEING_WORN) {
 304                                 do_wear(new_obj);
 305                         } else if (new_obj->in_use_flags & BEING_WIELDED) {
 306                                 do_wield(new_obj);
 307                         } else if (new_obj->in_use_flags & (ON_EITHER_HAND)) {
 308                                 do_put_on(new_obj,
 309                                         ((new_obj->in_use_flags & ON_LEFT_HAND) ? 1 : 0));
 310                         }
 311                 }
 312                 pack->next_object = new_obj;
 313                 pack = new_obj;
 314         }
 315 }
 316
 317 static void
 318 rw_dungeon(FILE *fp, boolean rw)
 319 {
 320         short i, j;
 321         char buf[DCOLS];
 322
 323         for (i = 0; i < DROWS; i++) {
 324                 if (rw) {
 325                         r_write(fp, (char *) dungeon[i], (DCOLS * sizeof(dungeon[0][0])));
 326                         for (j = 0; j < DCOLS; j++) {
 327                                 buf[j] = mvinch(i, j);
 328                         }
 329                         r_write(fp, buf, DCOLS);
 330                 } else {
 331                         r_read(fp, (char *) dungeon[i], (DCOLS * sizeof(dungeon[0][0])));
 332                         r_read(fp, buf, DCOLS);
 333                         for (j = 0; j < DCOLS; j++) {
 334                                 mvaddch(i, j, buf[j]);
 335                         }
 336                 }
 337         }
 338 }
 339
 340 static void
 341 rw_id(struct id id_table[], FILE *fp, int n, boolean wr)
 342 {
 343         short i;
 344
 345         for (i = 0; i < n; i++) {
 346                 if (wr) {
 347                         r_write(fp, (const char *) &(id_table[i].value), sizeof(short));
 348                         r_write(fp, (const char *) &(id_table[i].id_status),
 349                                 sizeof(unsigned short));
 350                         write_string(id_table[i].title, fp);
 351                 } else {
 352                         r_read(fp, (char *) &(id_table[i].value), sizeof(short));
 353                         r_read(fp, (char *) &(id_table[i].id_status),
 354                                 sizeof(unsigned short));
 355                         read_string(id_table[i].title, fp, MAX_ID_TITLE_LEN);
 356                 }
 357         }
 358 }
 359
 360 static void
 361 write_string(char *s, FILE *fp)
 362 {
 363         short n;
 364
 365         n = strlen(s) + 1;
 366         xxxx(s, n);
 367         r_write(fp, (char *) &n, sizeof(short));
 368         r_write(fp, s, n);
 369 }
 370
 371 static void
 372 read_string(char *s, FILE *fp, size_t len)
 373 {
 374         short n;
 375
 376         r_read(fp, (char *) &n, sizeof(short));
 377         if (n > (short)len)
 378                 clean_up("read_string: corrupt game file");
 379         r_read(fp, s, n);
 380         xxxx(s, n);
 381 }
 382
 383 static void
 384 rw_rooms(FILE *fp, boolean rw)
 385 {
 386         short i;
 387
 388         for (i = 0; i < MAXROOMS; i++) {
 389                 rw ? r_write(fp, (char *) (rooms + i), sizeof(room)) :
 390                         r_read(fp, (char *) (rooms + i), sizeof(room));
 391         }
 392 }
 393
 394 static void
 395 r_read(FILE *fp, char *buf, int n)
 396 {
 397         if (fread(buf, sizeof(char), n, fp) != (unsigned)n) {
 398                 clean_up("read() failed, don't know why");
 399         }
 400 }
 401
 402 static void
 403 r_write(FILE *fp, const char *buf, int n)
 404 {
 405         if (!write_failed) {
 406                 if (fwrite(buf, sizeof(char), n, fp) != (unsigned)n) {
 407                         message("write() failed, don't know why", 0);
 408                         sound_bell();
 409                         write_failed = 1;
 410                 }
 411         }
 412 }
 413
 414 static boolean
 415 has_been_touched(const struct rogue_time *saved_time,
 416                  const struct rogue_time *mod_time)
 417 {
 418         if (saved_time->year < mod_time->year) {
 419                 return(1);
 420         } else if (saved_time->year > mod_time->year) {
 421                 return(0);
 422         }
 423         if (saved_time->month < mod_time->month) {
 424                 return(1);
 425         } else if (saved_time->month > mod_time->month) {
 426                 return(0);
 427         }
 428         if (saved_time->day < mod_time->day) {
 429                 return(1);
 430         } else if (saved_time->day > mod_time->day) {
 431                 return(0);
 432         }
 433         if (saved_time->hour < mod_time->hour) {
 434                 return(1);
 435         } else if (saved_time->hour > mod_time->hour) {
 436                 return(0);
 437         }
 438         if (saved_time->minute < mod_time->minute) {
 439                 return(1);
 440         } else if (saved_time->minute > mod_time->minute) {
 441                 return(0);
 442         }
 443         if (saved_time->second < mod_time->second) {
 444                 return(1);
 445         }
 446         return(0);
 447 }