main/mission.c

   1 /* $Id: mission.c,v 1.24 2003-11-04 08:03:08 btb Exp $ */
   2 /*
   3 THE COMPUTER CODE CONTAINED HEREIN IS THE SOLE PROPERTY OF PARALLAX
   4 SOFTWARE CORPORATION ("PARALLAX").  PARALLAX, IN DISTRIBUTING THE CODE TO
   5 END-USERS, AND SUBJECT TO ALL OF THE TERMS AND CONDITIONS HEREIN, GRANTS A
   6 ROYALTY-FREE, PERPETUAL LICENSE TO SUCH END-USERS FOR USE BY SUCH END-USERS
   7 IN USING, DISPLAYING,  AND CREATING DERIVATIVE WORKS THEREOF, SO LONG AS
   8 SUCH USE, DISPLAY OR CREATION IS FOR NON-COMMERCIAL, ROYALTY OR REVENUE
   9 FREE PURPOSES.  IN NO EVENT SHALL THE END-USER USE THE COMPUTER CODE
  10 CONTAINED HEREIN FOR REVENUE-BEARING PURPOSES.  THE END-USER UNDERSTANDS
  11 AND AGREES TO THE TERMS HEREIN AND ACCEPTS THE SAME BY USE OF THIS FILE.
  12 COPYRIGHT 1993-1999 PARALLAX SOFTWARE CORPORATION.  ALL RIGHTS RESERVED.
  13 */
  14
  15 /*
  16  *
  17  * Code to handle multiple missions
  18  *
  19  * Old Log:
  20  * Revision 1.4  1995/10/31  10:21:40  allender
  21  * no mission support in shareware
  22  *
  23  * Revision 1.3  1995/10/21  22:53:04  allender
  24  * moved missions to data folder
  25  *
  26  * Revision 1.2  1995/09/13  08:47:29  allender
  27  * made to work with Chris' direct stuff
  28  *
  29  * Revision 1.1  1995/05/16  15:27:48  allender
  30  * Initial revision
  31  *
  32  * Revision 2.9  1995/05/26  16:16:32  john
  33  * Split SATURN into define's for requiring cd, using cd, etc.
  34  * Also started adding all the Rockwell stuff.
  35  *
  36  * Revision 2.8  1995/03/20  15:49:31  mike
  37  * Remove eof char from comment which confused make depend, causing
  38  * no mission.obj: line in makefile.  Pretty stupid tool, huh?
  39  *
  40  * Revision 2.7  1995/03/20  12:12:11  john
  41  * Added ifdef SATURN.
  42  *
  43  * Revision 2.6  1995/03/15  14:32:49  john
  44  * Added code to force the Descent CD-rom in the drive.
  45  *
  46  * Revision 2.5  1995/03/15  11:41:15  john
  47  * Better Saturn CD-ROM support.
  48  *
  49  * Revision 2.4  1995/03/14  18:24:14  john
  50  * Force Destination Saturn to use CD-ROM drive.
  51  *
  52  * Revision 2.3  1995/03/07  14:19:41  mike
  53  * More destination saturn stuff.
  54  *
  55  * Revision 2.2  1995/03/06  23:09:03  mike
  56  * more saturn stuff: make briefings work for saturn mission.
  57  *
  58  * Revision 2.1  1995/03/06  16:47:48  mike
  59  * destination saturn
  60  *
  61  * Revision 2.0  1995/02/27  11:27:49  john
  62  * New version 2.0, which has no anonymous unions, builds with
  63  * Watcom 10.0, and doesn't require parsing BITMAPS.TBL.
  64  *
  65  * Revision 1.14  1995/02/15  11:30:37  john
  66  * Fixed bug with potential mem overwrite on line 160.
  67  *
  68  * Revision 1.13  1995/02/10  17:53:20  matt
  69  * Changed mission name again
  70  *
  71  * Revision 1.12  1995/02/10  17:35:38  matt
  72  * Changed name of built-in mission
  73  *
  74  * Revision 1.11  1995/02/07  17:13:51  allender
  75  * removed return statement in load_mission so that built in mission will
  76  * actually set the Current_mission_name and _filename
  77  *
  78  * Revision 1.10  1995/01/31  01:19:45  matt
  79  * Made build_mission_list() sort missions by name
  80  *
  81  * Revision 1.9  1995/01/30  13:49:58  allender
  82  * changed build_mission_list in load_mission_by_name to include
  83  * anarchy levels.
  84  *
  85  * Revision 1.8  1995/01/30  13:03:51  matt
  86  * Fixed dumb mistake
  87  *
  88  * Revision 1.7  1995/01/30  12:55:22  matt
  89  * Added vars to point to mission names
  90  *
  91  * Revision 1.6  1995/01/22  18:57:28  matt
  92  * Made player highest level work with missions
  93  *
  94  * Revision 1.5  1995/01/22  14:13:08  matt
  95  * Added flag in mission list for anarchy-only missions
  96  *
  97  * Revision 1.4  1995/01/21  23:13:12  matt
  98  * Made high scores with (not work, really) with loaded missions
  99  * Don't give player high score when quit game
 100  *
 101  * Revision 1.3  1995/01/21  16:27:12  matt
 102  * Made endlevel briefing work with missions
 103  *
 104  * Revision 1.2  1995/01/20  22:47:50  matt
 105  * Mission system implemented, though imcompletely
 106  *
 107  * Revision 1.1  1995/01/20  13:42:19  matt
 108  * Initial revision
 109  *
 110  *
 111  */
 112
 113 #ifdef HAVE_CONFIG_H
 114 #include <conf.h>
 115 #endif
 116
 117 #include <stdio.h>
 118 #include <stdlib.h>
 119 #include <string.h>
 120 #include <ctype.h>
 121 #include <limits.h>
 122
 123 #include "pstypes.h"
 124 #include "cfile.h"
 125
 126 #include "strutil.h"
 127 #include "inferno.h"
 128 #include "mission.h"
 129 #include "gameseq.h"
 130 #include "titles.h"
 131 #include "songs.h"
 132 #include "mono.h"
 133 #include "error.h"
 134 #include "findfile.h"
 135
 136 mle Mission_list[MAX_MISSIONS];
 137
 138 int Current_mission_num;
 139 int N_secret_levels;    // Made a global by MK for scoring purposes.  August 1, 1995.
 140 char *Current_mission_filename,*Current_mission_longname;
 141
 142 int Builtin_mission_num;
 143 char Builtin_mission_filename[9];
 144 int Builtin_mission_hogsize;
 145
 146 int D1_Builtin_mission_num;
 147 char D1_Builtin_mission_filename[9];
 148 int D1_Builtin_mission_hogsize;
 149
 150 //this stuff should get defined elsewhere
 151
 152 char Level_names[MAX_LEVELS_PER_MISSION][FILENAME_LEN];
 153 char Secret_level_names[MAX_SECRET_LEVELS_PER_MISSION][FILENAME_LEN];
 154
 155 //values for d1 built-in mission
 156 #define BIM_LAST_LEVEL          27
 157 #define BIM_LAST_SECRET_LEVEL   -3
 158 #define BIM_BRIEFING_FILE       "briefing.tex"
 159 #define BIM_ENDING_FILE         "endreg.tex"
 160
 161 //
 162 //  Special versions of mission routines for d1 builtins
 163 //
 164
 165 int load_mission_d1(int mission_num)
 166 {
 167         int i;
 168
 169         cfile_use_descent1_hogfile("descent.hog");
 170
 171         Current_mission_num = mission_num;
 172         Current_mission_filename = Mission_list[mission_num].filename;
 173         Current_mission_longname = Mission_list[mission_num].mission_name;
 174
 175         switch (D1_Builtin_mission_hogsize) {
 176         case D1_SHAREWARE_MISSION_HOGSIZE:
 177         case D1_SHAREWARE_10_MISSION_HOGSIZE:
 178                 N_secret_levels = 0;
 179
 180                 Last_level = 7;
 181                 Last_secret_level = 0;
 182
 183                 //build level names
 184                 for (i=0;i<Last_level;i++)
 185                         sprintf(Level_names[i], "level%02d.sdl", i+1);
 186
 187                 break;
 188         case D1_MAC_SHARE_MISSION_HOGSIZE:
 189                 N_secret_levels = 0;
 190
 191                 Last_level = 3;
 192                 Last_secret_level = 0;
 193
 194                 //build level names
 195                 for (i=0;i<Last_level;i++)
 196                         sprintf(Level_names[i], "level%02d.sdl", i+1);
 197
 198                 break;
 199         case D1_OEM_MISSION_HOGSIZE:
 200         case D1_OEM_10_MISSION_HOGSIZE:
 201                 N_secret_levels = 1;
 202
 203                 Last_level = 15;
 204                 Last_secret_level = -1;
 205
 206                 //build level names
 207                 for (i=0; i < Last_level - 1; i++)
 208                         sprintf(Level_names[i], "level%02d.rdl", i+1);
 209                 sprintf(Level_names[i], "saturn%02d.rdl", i+1);
 210                 for (i=0; i < -Last_secret_level; i++)
 211                         sprintf(Secret_level_names[i], "levels%1d.rdl", i+1);
 212
 213                 Secret_level_table[0] = 10;
 214
 215                 break;
 216         default:
 217                 Int3(); // fall through
 218         case D1_MISSION_HOGSIZE:
 219         case D1_10_MISSION_HOGSIZE:
 220         case D1_MAC_MISSION_HOGSIZE:
 221                 N_secret_levels = 3;
 222
 223                 Last_level = BIM_LAST_LEVEL;
 224                 Last_secret_level = BIM_LAST_SECRET_LEVEL;
 225
 226                 //build level names
 227                 for (i=0;i<Last_level;i++)
 228                         sprintf(Level_names[i], "level%02d.rdl", i+1);
 229                 for (i=0;i<-Last_secret_level;i++)
 230                         sprintf(Secret_level_names[i], "levels%1d.rdl", i+1);
 231
 232                 Secret_level_table[0] = 10;
 233                 Secret_level_table[1] = 21;
 234                 Secret_level_table[2] = 24;
 235
 236                 break;
 237         }
 238         strcpy(Briefing_text_filename,BIM_BRIEFING_FILE);
 239         strcpy(Ending_text_filename,BIM_ENDING_FILE);
 240
 241         return 1;
 242 }
 243
 244
 245 //
 246 //  Special versions of mission routines for shareware
 247 //
 248
 249 int load_mission_shareware(int mission_num)
 250 {
 251         Current_mission_num = mission_num;
 252         Current_mission_filename = Mission_list[mission_num].filename;
 253         Current_mission_longname = Mission_list[mission_num].mission_name;
 254
 255         switch (Builtin_mission_hogsize) {
 256         case MAC_SHARE_MISSION_HOGSIZE:
 257                 N_secret_levels = 1;
 258
 259                 Last_level = 4;
 260                 Last_secret_level = -1;
 261
 262                 // mac demo is using the regular hog and rl2 files
 263                 strcpy(Level_names[0],"d2leva-1.rl2");
 264                 strcpy(Level_names[1],"d2leva-2.rl2");
 265                 strcpy(Level_names[2],"d2leva-3.rl2");
 266                 strcpy(Level_names[3],"d2leva-4.rl2");
 267                 strcpy(Secret_level_names[0],"d2leva-s.rl2");
 268                 break;
 269         default:
 270                 Int3(); // fall through
 271         case SHAREWARE_MISSION_HOGSIZE:
 272                 N_secret_levels = 0;
 273
 274                 Last_level = 3;
 275                 Last_secret_level = 0;
 276
 277                 strcpy(Level_names[0],"d2leva-1.sl2");
 278                 strcpy(Level_names[1],"d2leva-2.sl2");
 279                 strcpy(Level_names[2],"d2leva-3.sl2");
 280         }
 281
 282         return 1;
 283 }
 284
 285
 286 //
 287 //  Special versions of mission routines for Diamond/S3 version
 288 //
 289
 290 int load_mission_oem(int mission_num)
 291 {
 292         Current_mission_num = mission_num;
 293         Current_mission_filename = Mission_list[mission_num].filename;
 294         Current_mission_longname = Mission_list[mission_num].mission_name;
 295
 296         N_secret_levels = 2;
 297
 298         Last_level = 8;
 299         Last_secret_level = -2;
 300
 301         strcpy(Level_names[0],"d2leva-1.rl2");
 302         strcpy(Level_names[1],"d2leva-2.rl2");
 303         strcpy(Level_names[2],"d2leva-3.rl2");
 304         strcpy(Level_names[3],"d2leva-4.rl2");
 305
 306         strcpy(Secret_level_names[0],"d2leva-s.rl2");
 307
 308         strcpy(Level_names[4],"d2levb-1.rl2");
 309         strcpy(Level_names[5],"d2levb-2.rl2");
 310         strcpy(Level_names[6],"d2levb-3.rl2");
 311         strcpy(Level_names[7],"d2levb-4.rl2");
 312
 313         strcpy(Secret_level_names[1],"d2levb-s.rl2");
 314
 315         Secret_level_table[0] = 1;
 316         Secret_level_table[1] = 5;
 317
 318         return 1;
 319 }
 320
 321
 322 //strips damn newline from end of line
 323 char *mfgets(char *s,int n,CFILE *f)
 324 {
 325         char *r;
 326
 327         r = cfgets(s,n,f);
 328         if (r && s[strlen(s)-1] == '\n')
 329                 s[strlen(s)-1] = 0;
 330
 331         return r;
 332 }
 333
 334 //compare a string for a token. returns true if match
 335 int istok(char *buf,char *tok)
 336 {
 337         return strnicmp(buf,tok,strlen(tok)) == 0;
 338
 339 }
 340
 341 //adds a terminating 0 after a string at the first white space
 342 void add_term(char *s)
 343 {
 344         while (*s && !isspace(*s)) s++;
 345
 346         *s = 0;         //terminate!
 347 }
 348
 349 //returns ptr to string after '=' & white space, or NULL if no '='
 350 //adds 0 after parm at first white space
 351 char *get_value(char *buf)
 352 {
 353         char *t;
 354
 355         t = strchr(buf,'=')+1;
 356
 357         if (t) {
 358                 while (*t && isspace(*t)) t++;
 359
 360                 if (*t)
 361                         return t;
 362         }
 363
 364         return NULL;            //error!
 365 }
 366
 367 //reads a line, returns ptr to value of passed parm.  returns NULL if none
 368 char *get_parm_value(char *parm,CFILE *f)
 369 {
 370         static char buf[80];
 371
 372         if (!mfgets(buf,80,f))
 373                 return NULL;
 374
 375         if (istok(buf,parm))
 376                 return get_value(buf);
 377         else
 378                 return NULL;
 379 }
 380
 381 int ml_sort_func(mle *e0,mle *e1)
 382 {
 383         return stricmp(e0->mission_name,e1->mission_name);
 384
 385 }
 386
 387 extern char CDROM_dir[];
 388
 389 //returns 1 if file read ok, else 0
 390 int read_mission_file(char *filename,int count,int location)
 391 {
 392         char filename2[100];
 393         CFILE *mfile;
 394
 395         //printf("reading: %s\n", filename);
 396
 397         switch (location) {
 398                 case ML_MISSIONDIR:
 399                         strcpy(filename2,MISSION_DIR);
 400                         break;
 401
 402                 case ML_CDROM:
 403                         songs_stop_redbook();           //so we can read from the CD
 404                         strcpy(filename2,CDROM_dir);
 405                         break;
 406
 407                 default:
 408                         Int3();         //fall through
 409
 410                 case ML_CURDIR:
 411                         strcpy(filename2,"");
 412                         break;
 413         }
 414         strcat(filename2,filename);
 415
 416         mfile = cfopen(filename2,"rb");
 417
 418         if (mfile) {
 419                 char *p;
 420                 char temp[FILENAME_LEN],*t;
 421
 422                 strcpy(temp,filename);
 423                 if ((t = strchr(temp,'.')) == NULL)
 424                         return 0;       //missing extension
 425                 // look if it's .mn2 or .msn
 426                 Mission_list[count].descent_version = (t[3] == '2') ? 2 : 1;
 427                 *t = 0;                 //kill extension
 428
 429                 strncpy( Mission_list[count].filename, temp, 9 );
 430                 Mission_list[count].anarchy_only_flag = 0;
 431                 Mission_list[count].location = location;
 432
 433                 p = get_parm_value("name",mfile);
 434
 435                 if (!p) {               //try enhanced mission
 436                         cfseek(mfile,0,SEEK_SET);
 437                         p = get_parm_value("xname",mfile);
 438                 }
 439
 440                 if (!p) {       //try super-enhanced mission!
 441                         cfseek(mfile,0,SEEK_SET);
 442                         p = get_parm_value("zname",mfile);
 443                 }
 444
 445                 if (p) {
 446                         char *t;
 447                         if ((t=strchr(p,';'))!=NULL)
 448                                 *t=0;
 449                         t = p + strlen(p)-1;
 450                         while (isspace(*t)) t--;
 451                         strncpy(Mission_list[count].mission_name,p,MISSION_NAME_LEN);
 452                 }
 453                 else {
 454                         cfclose(mfile);
 455                         return 0;
 456                 }
 457
 458                 p = get_parm_value("type",mfile);
 459
 460                 //get mission type
 461                 if (p)
 462                         Mission_list[count].anarchy_only_flag = istok(p,"anarchy");
 463
 464                 cfclose(mfile);
 465
 466                 return 1;
 467         }
 468
 469         return 0;
 470 }
 471
 472 void add_d1_builtin_mission_to_list(int *count)
 473 {
 474         if (!cfexist("descent.hog"))
 475                 return;
 476
 477         D1_Builtin_mission_hogsize = cfile_size("descent.hog");
 478
 479         switch (D1_Builtin_mission_hogsize) {
 480         case D1_SHAREWARE_MISSION_HOGSIZE:
 481         case D1_SHAREWARE_10_MISSION_HOGSIZE:
 482         case D1_MAC_SHARE_MISSION_HOGSIZE:
 483                 strcpy(Mission_list[*count].filename, D1_MISSION_FILENAME);
 484                 strcpy(Mission_list[*count].mission_name, D1_SHAREWARE_MISSION_NAME);
 485                 Mission_list[*count].anarchy_only_flag = 0;
 486                 break;
 487         case D1_OEM_MISSION_HOGSIZE:
 488         case D1_OEM_10_MISSION_HOGSIZE:
 489                 strcpy(Mission_list[*count].filename, D1_MISSION_FILENAME);
 490                 strcpy(Mission_list[*count].mission_name, D1_OEM_MISSION_NAME);
 491                 Mission_list[*count].anarchy_only_flag = 0;
 492                 break;
 493         default:
 494                 Warning("Unknown D1 hogsize %d\n", D1_Builtin_mission_hogsize);
 495                 Int3();
 496                 // fall through
 497         case D1_MISSION_HOGSIZE:
 498         case D1_10_MISSION_HOGSIZE:
 499         case D1_MAC_MISSION_HOGSIZE:
 500                 strcpy(Mission_list[*count].filename, D1_MISSION_FILENAME);
 501                 strcpy(Mission_list[*count].mission_name, D1_MISSION_NAME);
 502                 Mission_list[*count].anarchy_only_flag = 0;
 503                 break;
 504         }
 505
 506         strcpy(D1_Builtin_mission_filename, Mission_list[*count].filename);
 507         Mission_list[*count].descent_version = 1;
 508         Mission_list[*count].anarchy_only_flag = 0;
 509         ++(*count);
 510 }
 511
 512
 513 void add_builtin_mission_to_list(int *count)
 514 {
 515         Builtin_mission_hogsize = cfile_size("descent2.hog");
 516         if (Builtin_mission_hogsize == -1)
 517                 Builtin_mission_hogsize = cfile_size("d2demo.hog");
 518
 519         switch (Builtin_mission_hogsize) {
 520         case SHAREWARE_MISSION_HOGSIZE:
 521         case MAC_SHARE_MISSION_HOGSIZE:
 522                 strcpy(Mission_list[*count].filename,SHAREWARE_MISSION_FILENAME);
 523                 strcpy(Mission_list[*count].mission_name,SHAREWARE_MISSION_NAME);
 524                 Mission_list[*count].anarchy_only_flag = 0;
 525                 break;
 526         case OEM_MISSION_HOGSIZE:
 527                 strcpy(Mission_list[*count].filename,OEM_MISSION_FILENAME);
 528                 strcpy(Mission_list[*count].mission_name,OEM_MISSION_NAME);
 529                 Mission_list[*count].anarchy_only_flag = 0;
 530                 break;
 531         default:
 532                 Warning("Unknown hogsize %d, trying %s\n", Builtin_mission_hogsize, FULL_MISSION_FILENAME ".mn2");
 533                 Int3(); //fall through
 534         case FULL_MISSION_HOGSIZE:
 535         case FULL_10_MISSION_HOGSIZE:
 536         case MAC_FULL_MISSION_HOGSIZE:
 537                 if (!read_mission_file(FULL_MISSION_FILENAME ".mn2", 0, ML_CURDIR))
 538                         Error("Could not find required mission file <%s>", FULL_MISSION_FILENAME ".mn2");
 539         }
 540
 541         strcpy(Builtin_mission_filename, Mission_list[*count].filename);
 542         Mission_list[*count].descent_version = 2;
 543         Mission_list[*count].anarchy_only_flag = 0;
 544         ++(*count);
 545 }
 546
 547
 548 void add_missions_to_list(char *search_name, int *count, int anarchy_mode)
 549 {
 550         FILEFINDSTRUCT find;
 551         if( !FileFindFirst( search_name, &find ) ) {
 552                 do      {
 553                         if (read_mission_file( find.name, *count, ML_MISSIONDIR )) {
 554
 555                                 if (anarchy_mode || !Mission_list[*count].anarchy_only_flag)
 556                                         ++(*count);
 557                         }
 558
 559                 } while( !FileFindNext( &find ) && *count < MAX_MISSIONS);
 560                 FileFindClose();
 561                 if (*count >= MAX_MISSIONS)
 562                         mprintf((0, "Warning: more missions than d2x can handle\n"));
 563         }
 564 }
 565
 566 /* move <mission_name> to <place> on mission list, increment <place> */
 567 void promote (char * mission_name, int * top_place, int num_missions)
 568 {
 569         int i;
 570         char name[FILENAME_LEN], * t;
 571         strcpy(name, mission_name);
 572         if ((t = strchr(name,'.')) != NULL)
 573                 *t = 0; //kill extension
 574         //printf("promoting: %s\n", name);
 575         for (i = *top_place; i < num_missions; i++)
 576                 if (!stricmp(Mission_list[i].filename, name)) {
 577                         //swap mission positions
 578                         mle temp;
 579
 580                         temp = Mission_list[*top_place];
 581                         Mission_list[*top_place] = Mission_list[i];
 582                         Mission_list[i] = temp;
 583                         ++(*top_place);
 584                         break;
 585                 }
 586 }
 587
 588
 589
 590 //fills in the global list of missions.  Returns the number of missions
 591 //in the list.  If anarchy_mode set, don't include non-anarchy levels.
 592
 593 extern char CDROM_dir[];
 594 extern char AltHogDir[];
 595 extern char AltHogdir_initialized;
 596
 597 int build_mission_list(int anarchy_mode)
 598 {
 599         static int num_missions=-1;
 600         int count = 0;
 601         int top_place;
 602
 603         //now search for levels on disk
 604
 605 //@@Took out this code because after this routine was called once for
 606 //@@a list of single-player missions, a subsequent call for a list of
 607 //@@anarchy missions would not scan again, and thus would not find the
 608 //@@anarchy-only missions.  If we retain the minimum level of install,
 609 //@@we may want to put the code back in, having it always scan for all
 610 //@@missions, and have the code that uses it sort out the ones it wants.
 611 //@@    if (num_missions != -1) {
 612 //@@            if (Current_mission_num != 0)
 613 //@@                    load_mission(0);                                //set built-in mission as default
 614 //@@            return num_missions;
 615 //@@    }
 616
 617         add_builtin_mission_to_list(&count);  //read built-in first
 618         add_d1_builtin_mission_to_list(&count);
 619         add_missions_to_list(MISSION_DIR "*.mn2", &count, anarchy_mode);
 620         add_missions_to_list(MISSION_DIR "*.msn", &count, anarchy_mode);
 621
 622         if (AltHogdir_initialized) {
 623                 char search_name[PATH_MAX + 5];
 624                 strcpy(search_name, AltHogDir);
 625                 strcat(search_name, "/" MISSION_DIR "*.mn2");
 626                 add_missions_to_list(search_name, &count, anarchy_mode);
 627                 strcpy(search_name, AltHogDir);
 628                 strcat(search_name, "/" MISSION_DIR "*.msn");
 629                 add_missions_to_list(search_name, &count, anarchy_mode);
 630         }
 631
 632         // move original missions (in story-chronological order)
 633         // to top of mission list
 634         top_place = 0;
 635         promote("descent", &top_place, count); // original descent 1 mission
 636         D1_Builtin_mission_num = top_place - 1;
 637         promote(Builtin_mission_filename, &top_place, count); // d2 or d2demo
 638         Builtin_mission_num = top_place - 1;
 639         promote("d2x", &top_place, count); // vertigo
 640
 641         if (count > top_place)
 642                 qsort(&Mission_list[top_place],
 643                       count - top_place,
 644                       sizeof(*Mission_list),
 645                                 (int (*)( const void *, const void * ))ml_sort_func);
 646
 647
 648         if (count > top_place)
 649                 qsort(&Mission_list[top_place],
 650                       count - top_place,
 651                       sizeof(*Mission_list),
 652                       (int (*)( const void *, const void * ))ml_sort_func);
 653
 654         //load_mission(0);   //set built-in mission as default
 655
 656         num_missions = count;
 657
 658         return count;
 659 }
 660
 661 void init_extra_robot_movie(char *filename);
 662
 663 //values for built-in mission
 664
 665 //loads the specfied mission from the mission list.
 666 //build_mission_list() must have been called.
 667 //Returns true if mission loaded ok, else false.
 668 int load_mission(int mission_num)
 669 {
 670         CFILE *mfile;
 671         char buf[80], *v;
 672         int found_hogfile;
 673         int enhanced_mission = 0;
 674
 675         if (mission_num == D1_Builtin_mission_num) {
 676                 cfile_use_descent1_hogfile("descent.hog");
 677                 switch (D1_Builtin_mission_hogsize) {
 678                 default:
 679                         Int3(); // fall through
 680                 case D1_MISSION_HOGSIZE:
 681                 case D1_10_MISSION_HOGSIZE:
 682                 case D1_MAC_MISSION_HOGSIZE:
 683                 case D1_OEM_MISSION_HOGSIZE:
 684                 case D1_OEM_10_MISSION_HOGSIZE:
 685                 case D1_SHAREWARE_MISSION_HOGSIZE:
 686                 case D1_SHAREWARE_10_MISSION_HOGSIZE:
 687                 case D1_MAC_SHARE_MISSION_HOGSIZE:
 688                         return load_mission_d1(mission_num);
 689                         break;
 690                 }
 691         }
 692
 693         if (mission_num == Builtin_mission_num) {
 694                 switch (Builtin_mission_hogsize) {
 695                 case SHAREWARE_MISSION_HOGSIZE:
 696                 case MAC_SHARE_MISSION_HOGSIZE:
 697                         return load_mission_shareware(mission_num);
 698                         break;
 699                 case OEM_MISSION_HOGSIZE:
 700                         return load_mission_oem(mission_num);
 701                         break;
 702                 default:
 703                         Int3(); // fall through
 704                 case FULL_MISSION_HOGSIZE:
 705                 case FULL_10_MISSION_HOGSIZE:
 706                 case MAC_FULL_MISSION_HOGSIZE:
 707                         // continue on... (use d2.mn2 from hogfile)
 708                         break;
 709                 }
 710         }
 711
 712         Current_mission_num = mission_num;
 713
 714         mprintf(( 0, "Loading mission %d\n", mission_num ));
 715
 716         //read mission from file
 717
 718         switch (Mission_list[mission_num].location) {
 719         case ML_MISSIONDIR:
 720                 strcpy(buf,MISSION_DIR);
 721                 break;
 722         case ML_CDROM:
 723                 strcpy(buf,CDROM_dir);
 724                 break;
 725         default:
 726                 Int3();                                                 //fall through
 727         case ML_CURDIR:
 728                 strcpy(buf,"");
 729                 break;
 730         }
 731         strcat(buf,Mission_list[mission_num].filename);
 732         if (Mission_list[mission_num].descent_version == 2)
 733                 strcat(buf,".mn2");
 734         else
 735                 strcat(buf,".msn");
 736
 737         mfile = cfopen(buf,"rb");
 738         if (mfile == NULL) {
 739                 Current_mission_num = -1;
 740                 return 0;               //error!
 741         }
 742
 743         //for non-builtin missions, load HOG
 744         if (strcmp(Mission_list[mission_num].filename, Builtin_mission_filename)) {
 745
 746                 strcpy(buf+strlen(buf)-4,".hog");               //change extension
 747
 748                 found_hogfile = cfile_use_alternate_hogfile(buf);
 749
 750                 #ifdef RELEASE                          //for release, require mission to be in hogfile
 751                 if (! found_hogfile) {
 752                         cfclose(mfile);
 753                         Current_mission_num = -1;
 754                         return 0;
 755                 }
 756                 #endif
 757
 758                 // for Descent 1 missions, load descent.hog
 759                 if (Mission_list[mission_num].descent_version == 1 && strcmp(buf, "descent.hog"))
 760                         if (!cfile_use_descent1_hogfile("descent.hog"))
 761                                 Warning("descent.hog not available, this mission may be missing some files required for briefings and exit sequence\n");
 762         }
 763
 764         //init vars
 765         Last_level = 0;
 766         Last_secret_level = 0;
 767         Briefing_text_filename[0] = 0;
 768         Ending_text_filename[0] = 0;
 769
 770         while (mfgets(buf,80,mfile)) {
 771
 772                 if (istok(buf,"name"))
 773                         continue;                                               //already have name, go to next line
 774                 if (istok(buf,"xname")) {
 775                         enhanced_mission = 1;
 776                         continue;                                               //already have name, go to next line
 777                 }
 778                 if (istok(buf,"zname")) {
 779                         enhanced_mission = 2;
 780                         continue;                                               //already have name, go to next line
 781                 }
 782                 else if (istok(buf,"type"))
 783                         continue;                                               //already have name, go to next line
 784                 else if (istok(buf,"hog")) {
 785                         char    *bufp = buf;
 786
 787                         while (*(bufp++) != '=')
 788                                 ;
 789
 790                         if (*bufp == ' ')
 791                                 while (*(++bufp) == ' ')
 792                                         ;
 793
 794                         cfile_use_alternate_hogfile(bufp);
 795                         mprintf((0, "Hog file override = [%s]\n", bufp));
 796                 }
 797                 else if (istok(buf,"briefing")) {
 798                         if ((v = get_value(buf)) != NULL) {
 799                                 add_term(v);
 800                                 if (strlen(v) < 13)
 801                                         strcpy(Briefing_text_filename,v);
 802                         }
 803                 }
 804                 else if (istok(buf,"ending")) {
 805                         if ((v = get_value(buf)) != NULL) {
 806                                 add_term(v);
 807                                 if (strlen(v) < 13)
 808                                         strcpy(Ending_text_filename,v);
 809                         }
 810                 }
 811                 else if (istok(buf,"num_levels")) {
 812
 813                         if ((v=get_value(buf))!=NULL) {
 814                                 int n_levels,i;
 815
 816                                 n_levels = atoi(v);
 817
 818                                 for (i=0;i<n_levels && mfgets(buf,80,mfile);i++) {
 819
 820                                         add_term(buf);
 821                                         if (strlen(buf) <= 12) {
 822                                                 strcpy(Level_names[i],buf);
 823                                                 Last_level++;
 824                                         }
 825                                         else
 826                                                 break;
 827                                 }
 828
 829                         }
 830                 }
 831                 else if (istok(buf,"num_secrets")) {
 832                         if ((v=get_value(buf))!=NULL) {
 833                                 int i;
 834
 835                                 N_secret_levels = atoi(v);
 836
 837                                 Assert(N_secret_levels <= MAX_SECRET_LEVELS_PER_MISSION);
 838
 839                                 for (i=0;i<N_secret_levels && mfgets(buf,80,mfile);i++) {
 840                                         char *t;
 841
 842
 843                                         if ((t=strchr(buf,','))!=NULL) *t++=0;
 844                                         else
 845                                                 break;
 846
 847                                         add_term(buf);
 848                                         if (strlen(buf) <= 12) {
 849                                                 strcpy(Secret_level_names[i],buf);
 850                                                 Secret_level_table[i] = atoi(t);
 851                                                 if (Secret_level_table[i]<1 || Secret_level_table[i]>Last_level)
 852                                                         break;
 853                                                 Last_secret_level--;
 854                                         }
 855                                         else
 856                                                 break;
 857                                 }
 858
 859                         }
 860                 }
 861
 862         }
 863
 864         cfclose(mfile);
 865
 866         if (Last_level <= 0) {
 867                 Current_mission_num = -1;               //no valid mission loaded
 868                 return 0;
 869         }
 870
 871         Current_mission_filename = Mission_list[Current_mission_num].filename;
 872         Current_mission_longname = Mission_list[Current_mission_num].mission_name;
 873
 874         if (enhanced_mission) {
 875                 char t[50];
 876                 extern void bm_read_extra_robots();
 877                 sprintf(t,"%s.ham",Current_mission_filename);
 878                 bm_read_extra_robots(t,enhanced_mission);
 879                 strncpy(t,Current_mission_filename,6);
 880                 strcat(t,"-l.mvl");
 881                 init_extra_robot_movie(t);
 882         }
 883
 884         return 1;
 885 }
 886
 887 //loads the named mission if exists.
 888 //Returns true if mission loaded ok, else false.
 889 int load_mission_by_name(char *mission_name)
 890 {
 891         int n,i;
 892
 893         n = build_mission_list(1);
 894
 895         for (i=0;i<n;i++)
 896                 if (!stricmp(mission_name,Mission_list[i].filename))
 897                         return load_mission(i);
 898
 899         return 0;               //couldn't find mission
 900 }