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. All advertising materials mentioning features or use of this software
  17  *    must display the following acknowledgement:
  18  *      This product includes software developed by the University of
  19  *      California, Berkeley and its contributors.
  20  * 4. Neither the name of the University nor the names of its contributors
  21  *    may be used to endorse or promote products derived from this software
  22  *    without specific prior written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  34  * SUCH DAMAGE.
  35  *
  36  * @(#)save.c   8.1 (Berkeley) 5/31/93
  37  * $FreeBSD: src/games/rogue/save.c,v 1.6 1999/11/30 03:49:27 billf Exp $
  38  * $DragonFly: src/games/rogue/save.c,v 1.4 2006/09/02 19:31:07 pavalos Exp $
  39  */
  40
  41 /*
  42  * save.c
  43  *
  44  * This source herein may be modified and/or distributed by anybody who
  45  * so desires, with the following restrictions:
  46  *    1.)  No portion of this notice shall be removed.
  47  *    2.)  Credit shall not be taken for the creation of this source.
  48  *    3.)  This code is not to be traded, sold, or used for personal
  49  *         gain or profit.
  50  *
  51  */
  52
  53 #include <stdio.h>
  54 #include <unistd.h>
  55 #include "rogue.h"
  56
  57 short write_failed = 0;
  58 char *save_file = NULL;
  59 static char save_name[80];
  60
  61 extern short cur_level, max_level;
  62 extern short party_room;
  63 extern short foods;
  64 extern boolean is_wood[];
  65 extern short cur_room;
  66 extern boolean being_held;
  67 extern short bear_trap;
  68 extern short halluc;
  69 extern short blind;
  70 extern short confused;
  71 extern short levitate;
  72 extern short haste_self;
  73 extern boolean see_invisible;
  74 extern boolean detect_monster;
  75 extern boolean wizard;
  76 extern boolean score_only;
  77 extern short m_moves;
  78
  79 extern boolean msg_cleared;
  80
  81 static void     del_save_file(void);
  82 static void     write_pack(const object *, FILE *);
  83 static void     read_pack(object *, FILE *, boolean);
  84 static void     rw_dungeon(FILE *, boolean);
  85 static void     rw_id(struct id *, FILE *, int, boolean);
  86 static void     write_string(char *, FILE *);
  87 static void     read_string(char *, FILE *, size_t);
  88 static void     rw_rooms(FILE *, boolean);
  89 static void     r_read(FILE *, char *, int);
  90 static void     r_write(FILE *, const char *, int);
  91 static boolean  has_been_touched(const struct rogue_time *,
  92                                  const struct rogue_time *);
  93
  94 void
  95 save_game(void)
  96 {
  97         char fname[64];
  98
  99         if (!get_input_line("file name?", save_file, fname, "game not saved",
 100                         0, 1)) {
 101                 return;
 102         }
 103         check_message();
 104         message(fname, 0);
 105         save_into_file(fname);
 106 }
 107
 108 void
 109 save_into_file(const char *sfile)
 110 {
 111         FILE *fp;
 112         int file_id;
 113         char *name_buffer;
 114         size_t len;
 115         char *hptr;
 116         struct rogue_time rt_buf;
 117
 118         if (sfile[0] == '~') {
 119                 if ((hptr = md_getenv("HOME"))) {
 120                         len = strlen(hptr) + strlen(sfile);
 121                         name_buffer = md_malloc(len);
 122                         if (name_buffer == NULL) {
 123                                 message("out of memory for save file name", 0);
 124                                 sfile = error_file;
 125                         } else {
 126                                 strcpy(name_buffer, hptr);
 127                                 strcat(name_buffer, sfile+1);
 128                                 sfile = name_buffer;
 129                         }
 130
 131                 }
 132         }
 133         /* revoke */
 134         setgid(getgid());
 135         if (    ((fp = fopen(sfile, "w")) == NULL) ||
 136                         ((file_id = md_get_file_id(sfile)) == -1)) {
 137                 message("problem accessing the save file", 0);
 138                 return;
 139         }
 140         md_ignore_signals();
 141         write_failed = 0;
 142         xxx(1);
 143         r_write(fp, (char *) &detect_monster, sizeof(detect_monster));
 144         r_write(fp, (char *) &cur_level, sizeof(cur_level));
 145         r_write(fp, (char *) &max_level, sizeof(max_level));
 146         write_string(hunger_str, fp);
 147         write_string(login_name, fp);
 148         r_write(fp, (char *) &party_room, sizeof(party_room));
 149         write_pack(&level_monsters, fp);
 150         write_pack(&level_objects, fp);
 151         r_write(fp, (char *) &file_id, sizeof(file_id));
 152         rw_dungeon(fp, 1);
 153         r_write(fp, (char *) &foods, sizeof(foods));
 154         r_write(fp, (char *) &rogue, sizeof(fighter));
 155         write_pack(&rogue.pack, fp);
 156         rw_id(id_potions, fp, POTIONS, 1);
 157         rw_id(id_scrolls, fp, SCROLS, 1);
 158         rw_id(id_wands, fp, WANDS, 1);
 159         rw_id(id_rings, fp, RINGS, 1);
 160         r_write(fp, (char *) traps, (MAX_TRAPS * sizeof(trap)));
 161         r_write(fp, (char *) is_wood, (WANDS * sizeof(boolean)));
 162         r_write(fp, (char *) &cur_room, sizeof(cur_room));
 163         rw_rooms(fp, 1);
 164         r_write(fp, (char *) &being_held, sizeof(being_held));
 165         r_write(fp, (char *) &bear_trap, sizeof(bear_trap));
 166         r_write(fp, (char *) &halluc, sizeof(halluc));
 167         r_write(fp, (char *) &blind, sizeof(blind));
 168         r_write(fp, (char *) &confused, sizeof(confused));
 169         r_write(fp, (char *) &levitate, sizeof(levitate));
 170         r_write(fp, (char *) &haste_self, sizeof(haste_self));
 171         r_write(fp, (char *) &see_invisible, sizeof(see_invisible));
 172         r_write(fp, (char *) &detect_monster, sizeof(detect_monster));
 173         r_write(fp, (char *) &wizard, sizeof(wizard));
 174         r_write(fp, (char *) &score_only, sizeof(score_only));
 175         r_write(fp, (char *) &m_moves, sizeof(m_moves));
 176         md_gct(&rt_buf);
 177         rt_buf.second += 10;            /* allow for some processing time */
 178         r_write(fp, (char *) &rt_buf, sizeof(rt_buf));
 179         fclose(fp);
 180
 181         if (write_failed) {
 182                 md_df(sfile);   /* delete file */
 183         } else {
 184                 if (strcmp(sfile, save_name) == 0)
 185                         save_name[0] = 0;
 186                 clean_up("");
 187         }
 188 }
 189
 190 static void
 191 del_save_file(void)
 192 {
 193         if (!save_name[0])
 194                 return;
 195         /* revoke */
 196         setgid(getgid());
 197         md_df(save_name);
 198 }
 199
 200 void
 201 restore(const char *fname)
 202 {
 203         FILE *fp = NULL;
 204         struct rogue_time saved_time, mod_time;
 205         char buf[4];
 206         char tbuf[40];
 207         int new_file_id, saved_file_id;
 208
 209         if (    ((new_file_id = md_get_file_id(fname)) == -1) ||
 210                         ((fp = fopen(fname, "r")) == NULL)) {
 211                 clean_up("cannot open file");
 212         }
 213         if (md_link_count(fname) > 1) {
 214                 clean_up("file has link");
 215         }
 216         xxx(1);
 217         r_read(fp, (char *) &detect_monster, sizeof(detect_monster));
 218         r_read(fp, (char *) &cur_level, sizeof(cur_level));
 219         r_read(fp, (char *) &max_level, sizeof(max_level));
 220         read_string(hunger_str, fp, sizeof hunger_str);
 221
 222         strlcpy(tbuf, login_name, sizeof tbuf);
 223         read_string(login_name, fp, sizeof login_name);
 224         if (strcmp(tbuf, login_name)) {
 225                 clean_up("you're not the original player");
 226         }
 227
 228         r_read(fp, (char *) &party_room, sizeof(party_room));
 229         read_pack(&level_monsters, fp, 0);
 230         read_pack(&level_objects, fp, 0);
 231         r_read(fp, (char *) &saved_file_id, sizeof(saved_file_id));
 232         if (new_file_id != saved_file_id) {
 233                 clean_up("sorry, saved game is not in the same file");
 234         }
 235         rw_dungeon(fp, 0);
 236         r_read(fp, (char *) &foods, sizeof(foods));
 237         r_read(fp, (char *) &rogue, sizeof(fighter));
 238         read_pack(&rogue.pack, fp, 1);
 239         rw_id(id_potions, fp, POTIONS, 0);
 240         rw_id(id_scrolls, fp, SCROLS, 0);
 241         rw_id(id_wands, fp, WANDS, 0);
 242         rw_id(id_rings, fp, RINGS, 0);
 243         r_read(fp, (char *) traps, (MAX_TRAPS * sizeof(trap)));
 244         r_read(fp, (char *) is_wood, (WANDS * sizeof(boolean)));
 245         r_read(fp, (char *) &cur_room, sizeof(cur_room));
 246         rw_rooms(fp, 0);
 247         r_read(fp, (char *) &being_held, sizeof(being_held));
 248         r_read(fp, (char *) &bear_trap, sizeof(bear_trap));
 249         r_read(fp, (char *) &halluc, sizeof(halluc));
 250         r_read(fp, (char *) &blind, sizeof(blind));
 251         r_read(fp, (char *) &confused, sizeof(confused));
 252         r_read(fp, (char *) &levitate, sizeof(levitate));
 253         r_read(fp, (char *) &haste_self, sizeof(haste_self));
 254         r_read(fp, (char *) &see_invisible, sizeof(see_invisible));
 255         r_read(fp, (char *) &detect_monster, sizeof(detect_monster));
 256         r_read(fp, (char *) &wizard, sizeof(wizard));
 257         r_read(fp, (char *) &score_only, sizeof(score_only));
 258         r_read(fp, (char *) &m_moves, sizeof(m_moves));
 259         r_read(fp, (char *) &saved_time, sizeof(saved_time));
 260
 261         if (fread(buf, sizeof(char), 1, fp) > 0) {
 262                 clear();
 263                 clean_up("extra characters in file");
 264         }
 265
 266         md_gfmt(fname, &mod_time);      /* get file modification time */
 267
 268         if (has_been_touched(&saved_time, &mod_time)) {
 269                 clear();
 270                 clean_up("sorry, file has been touched");
 271         }
 272         if ((!wizard)) {
 273                 strcpy(save_name, fname);
 274                 atexit(del_save_file);
 275         }
 276         msg_cleared = 0;
 277         ring_stats(0);
 278         fclose(fp);
 279 }
 280
 281 static void
 282 write_pack(const object *pack, FILE *fp)
 283 {
 284         object t;
 285
 286         while ((pack = pack->next_object)) {
 287                 r_write(fp, (const char *) pack, sizeof(object));
 288         }
 289         t.ichar = t.what_is = 0;
 290         r_write(fp, (const char *) &t, sizeof(object));
 291 }
 292
 293 static void
 294 read_pack(object *pack, FILE *fp, boolean is_rogue)
 295 {
 296         object read_obj, *new_obj;
 297
 298         for (;;) {
 299                 r_read(fp, (char *) &read_obj, sizeof(object));
 300                 if (read_obj.ichar == 0) {
 301                         pack->next_object = NULL;
 302                         break;
 303                 }
 304                 new_obj = alloc_object();
 305                 *new_obj = read_obj;
 306                 if (is_rogue) {
 307                         if (new_obj->in_use_flags & BEING_WORN) {
 308                                         do_wear(new_obj);
 309                         } else if (new_obj->in_use_flags & BEING_WIELDED) {
 310                                         do_wield(new_obj);
 311                         } else if (new_obj->in_use_flags & (ON_EITHER_HAND)) {
 312                                 do_put_on(new_obj,
 313                                         ((new_obj->in_use_flags & ON_LEFT_HAND) ? 1 : 0));
 314                         }
 315                 }
 316                 pack->next_object = new_obj;
 317                 pack = new_obj;
 318         }
 319 }
 320
 321 static void
 322 rw_dungeon(FILE *fp, boolean rw)
 323 {
 324         short i, j;
 325         char buf[DCOLS];
 326
 327         for (i = 0; i < DROWS; i++) {
 328                 if (rw) {
 329                         r_write(fp, (char *) dungeon[i], (DCOLS * sizeof(dungeon[0][0])));
 330                         for (j = 0; j < DCOLS; j++) {
 331                                 buf[j] = mvinch(i, j);
 332                         }
 333                         r_write(fp, buf, DCOLS);
 334                 } else {
 335                         r_read(fp, (char *) dungeon[i], (DCOLS * sizeof(dungeon[0][0])));
 336                         r_read(fp, buf, DCOLS);
 337                         for (j = 0; j < DCOLS; j++) {
 338                                 mvaddch(i, j, buf[j]);
 339                         }
 340                 }
 341         }
 342 }
 343
 344 static void
 345 rw_id(struct id id_table[], FILE *fp, int n, boolean wr)
 346 {
 347         short i;
 348
 349         for (i = 0; i < n; i++) {
 350                 if (wr) {
 351                         r_write(fp, (const char *) &(id_table[i].value), sizeof(short));
 352                         r_write(fp, (const char *) &(id_table[i].id_status),
 353                                 sizeof(unsigned short));
 354                         write_string(id_table[i].title, fp);
 355                 } else {
 356                         r_read(fp, (char *) &(id_table[i].value), sizeof(short));
 357                         r_read(fp, (char *) &(id_table[i].id_status),
 358                                 sizeof(unsigned short));
 359                         read_string(id_table[i].title, fp, MAX_ID_TITLE_LEN);
 360                 }
 361         }
 362 }
 363
 364 static void
 365 write_string(char *s, FILE *fp)
 366 {
 367         short n;
 368
 369         n = strlen(s) + 1;
 370         xxxx(s, n);
 371         r_write(fp, (char *) &n, sizeof(short));
 372         r_write(fp, s, n);
 373 }
 374
 375 static void
 376 read_string(char *s, FILE *fp, size_t len)
 377 {
 378         short n;
 379
 380         r_read(fp, (char *) &n, sizeof(short));
 381         if (n > (short)len)
 382                 clean_up("read_string: corrupt game file");
 383         r_read(fp, s, n);
 384         xxxx(s, n);
 385 }
 386
 387 static void
 388 rw_rooms(FILE *fp, boolean rw)
 389 {
 390         short i;
 391
 392         for (i = 0; i < MAXROOMS; i++) {
 393                 rw ? r_write(fp, (char *) (rooms + i), sizeof(room)) :
 394                         r_read(fp, (char *) (rooms + i), sizeof(room));
 395         }
 396 }
 397
 398 static void
 399 r_read(FILE *fp, char *buf, int n)
 400 {
 401         if (fread(buf, sizeof(char), n, fp) != (unsigned)n) {
 402                 clean_up("read() failed, don't know why");
 403         }
 404 }
 405
 406 static void
 407 r_write(FILE *fp, const char *buf, int n)
 408 {
 409         if (!write_failed) {
 410                 if (fwrite(buf, sizeof(char), n, fp) != (unsigned)n) {
 411                         message("write() failed, don't know why", 0);
 412                         sound_bell();
 413                         write_failed = 1;
 414                 }
 415         }
 416 }
 417
 418 static boolean
 419 has_been_touched(const struct rogue_time *saved_time,
 420                  const struct rogue_time *mod_time)
 421 {
 422         if (saved_time->year < mod_time->year) {
 423                 return(1);
 424         } else if (saved_time->year > mod_time->year) {
 425                 return(0);
 426         }
 427         if (saved_time->month < mod_time->month) {
 428                 return(1);
 429         } else if (saved_time->month > mod_time->month) {
 430                 return(0);
 431         }
 432         if (saved_time->day < mod_time->day) {
 433                 return(1);
 434         } else if (saved_time->day > mod_time->day) {
 435                 return(0);
 436         }
 437         if (saved_time->hour < mod_time->hour) {
 438                 return(1);
 439         } else if (saved_time->hour > mod_time->hour) {
 440                 return(0);
 441         }
 442         if (saved_time->minute < mod_time->minute) {
 443                 return(1);
 444         } else if (saved_time->minute > mod_time->minute) {
 445                 return(0);
 446         }
 447         if (saved_time->second < mod_time->second) {
 448                 return(1);
 449         }
 450         return(0);
 451 }