main/mission.c

   1 /* $Id: mission.c,v 1.17 2003-01-07 03:10:20 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 #include "hoard.h"
 136
 137 mle Mission_list[MAX_MISSIONS];
 138
 139 int Current_mission_num;
 140 int N_secret_levels;    // Made a global by MK for scoring purposes.  August 1, 1995.
 141 char *Current_mission_filename,*Current_mission_longname;
 142
 143 int Builtin_mission_num;
 144 char Builtin_mission_filename[9];
 145 int Builtin_mission_hogsize;
 146
 147 int D1_Builtin_mission_num;
 148 char D1_Builtin_mission_filename[9];
 149 int D1_Builtin_mission_hogsize;
 150
 151 //this stuff should get defined elsewhere
 152
 153 char Level_names[MAX_LEVELS_PER_MISSION][FILENAME_LEN];
 154 char Secret_level_names[MAX_SECRET_LEVELS_PER_MISSION][FILENAME_LEN];
 155
 156 //where the missions go
 157 #ifndef EDITOR
 158 #define MISSION_DIR "missions/"
 159 #else
 160 #define MISSION_DIR "./"
 161 #endif
 162
 163 //values for d1 built-in mission
 164 #define BIM_LAST_LEVEL          27
 165 #define BIM_LAST_SECRET_LEVEL   -3
 166 #define BIM_BRIEFING_FILE       "briefing.tex"
 167 #define BIM_ENDING_FILE         "endreg.tex"
 168
 169 //
 170 //  Special versions of mission routines for d1 builtins
 171 //
 172
 173 int load_mission_d1(int mission_num)
 174 {
 175         int i;
 176
 177         cfile_use_descent1_hogfile("descent.hog");
 178
 179         Current_mission_num = mission_num;
 180         Current_mission_filename = Mission_list[mission_num].filename;
 181         Current_mission_longname = Mission_list[mission_num].mission_name;
 182
 183         switch (D1_Builtin_mission_hogsize) {
 184         case D1_SHAREWARE_MISSION_HOGSIZE:
 185                 N_secret_levels = 0;
 186
 187                 Last_level = 7;
 188                 Last_secret_level = 0;
 189
 190                 //build level names
 191                 for (i=0;i<Last_level;i++)
 192                         sprintf(Level_names[i], "level%02d.sdl", i+1);
 193
 194                 break;
 195         default:
 196                 Int3(); // fall through
 197         case D1_MISSION_HOGSIZE:
 198                 N_secret_levels = 3;
 199
 200                 Last_level = BIM_LAST_LEVEL;
 201                 Last_secret_level = BIM_LAST_SECRET_LEVEL;
 202
 203                 //build level names
 204                 for (i=0;i<Last_level;i++)
 205                         sprintf(Level_names[i], "level%02d.rdl", i+1);
 206                 for (i=0;i<-Last_secret_level;i++)
 207                         sprintf(Secret_level_names[i], "levels%1d.rdl", i+1);
 208
 209                 Secret_level_table[0] = 10;
 210                 Secret_level_table[1] = 21;
 211                 Secret_level_table[2] = 24;
 212
 213                 break;
 214         }
 215         strcpy(Briefing_text_filename,BIM_BRIEFING_FILE);
 216         strcpy(Ending_text_filename,BIM_ENDING_FILE);
 217
 218         return 1;
 219 }
 220
 221
 222 //
 223 //  Special versions of mission routines for shareware
 224 //
 225
 226 int load_mission_shareware(int mission_num)
 227 {
 228         Current_mission_num = mission_num;
 229         Current_mission_filename = Mission_list[mission_num].filename;
 230         Current_mission_longname = Mission_list[mission_num].mission_name;
 231
 232         N_secret_levels = 0;
 233
 234         Last_level = 3;
 235         Last_secret_level = 0;
 236
 237         switch (Builtin_mission_hogsize) {
 238         case MAC_SHARE_MISSION_HOGSIZE:
 239                 // mac demo is using the regular hog and rl2 files
 240                 strcpy(Level_names[0],"d2leva-1.rl2");
 241                 strcpy(Level_names[1],"d2leva-2.rl2");
 242                 strcpy(Level_names[2],"d2leva-3.rl2");
 243                 break;
 244         default:
 245                 Int3(); // fall through
 246         case SHAREWARE_MISSION_HOGSIZE:
 247                 strcpy(Level_names[0],"d2leva-1.sl2");
 248                 strcpy(Level_names[1],"d2leva-2.sl2");
 249                 strcpy(Level_names[2],"d2leva-3.sl2");
 250         }
 251
 252         return 1;
 253 }
 254
 255
 256 //
 257 //  Special versions of mission routines for Diamond/S3 version
 258 //
 259
 260 int load_mission_oem(int mission_num)
 261 {
 262         Current_mission_num = mission_num;
 263         Current_mission_filename = Mission_list[mission_num].filename;
 264         Current_mission_longname = Mission_list[mission_num].mission_name;
 265
 266         N_secret_levels = 2;
 267
 268         Last_level = 8;
 269         Last_secret_level = -2;
 270
 271         strcpy(Level_names[0],"d2leva-1.rl2");
 272         strcpy(Level_names[1],"d2leva-2.rl2");
 273         strcpy(Level_names[2],"d2leva-3.rl2");
 274         strcpy(Level_names[3],"d2leva-4.rl2");
 275
 276         strcpy(Secret_level_names[0],"d2leva-s.rl2");
 277
 278         strcpy(Level_names[4],"d2levb-1.rl2");
 279         strcpy(Level_names[5],"d2levb-2.rl2");
 280         strcpy(Level_names[6],"d2levb-3.rl2");
 281         strcpy(Level_names[7],"d2levb-4.rl2");
 282
 283         strcpy(Secret_level_names[1],"d2levb-s.rl2");
 284
 285         Secret_level_table[0] = 1;
 286         Secret_level_table[1] = 5;
 287
 288         return 1;
 289 }
 290
 291
 292 //strips damn newline from end of line
 293 char *mfgets(char *s,int n,CFILE *f)
 294 {
 295         char *r;
 296
 297         r = cfgets(s,n,f);
 298         if (r && s[strlen(s)-1] == '\n')
 299                 s[strlen(s)-1] = 0;
 300
 301         return r;
 302 }
 303
 304 //compare a string for a token. returns true if match
 305 int istok(char *buf,char *tok)
 306 {
 307         return strnicmp(buf,tok,strlen(tok)) == 0;
 308
 309 }
 310
 311 //adds a terminating 0 after a string at the first white space
 312 void add_term(char *s)
 313 {
 314         while (*s && !isspace(*s)) s++;
 315
 316         *s = 0;         //terminate!
 317 }
 318
 319 //returns ptr to string after '=' & white space, or NULL if no '='
 320 //adds 0 after parm at first white space
 321 char *get_value(char *buf)
 322 {
 323         char *t;
 324
 325         t = strchr(buf,'=')+1;
 326
 327         if (t) {
 328                 while (*t && isspace(*t)) t++;
 329
 330                 if (*t)
 331                         return t;
 332         }
 333
 334         return NULL;            //error!
 335 }
 336
 337 //reads a line, returns ptr to value of passed parm.  returns NULL if none
 338 char *get_parm_value(char *parm,CFILE *f)
 339 {
 340         static char buf[80];
 341
 342         if (!mfgets(buf,80,f))
 343                 return NULL;
 344
 345         if (istok(buf,parm))
 346                 return get_value(buf);
 347         else
 348                 return NULL;
 349 }
 350
 351 int ml_sort_func(mle *e0,mle *e1)
 352 {
 353         return stricmp(e0->mission_name,e1->mission_name);
 354
 355 }
 356
 357 extern char CDROM_dir[];
 358
 359 //returns 1 if file read ok, else 0
 360 int read_mission_file(char *filename,int count,int location)
 361 {
 362         char filename2[100];
 363         CFILE *mfile;
 364
 365         //printf("reading: %s\n", filename);
 366
 367         switch (location) {
 368                 case ML_MISSIONDIR:
 369                         strcpy(filename2,MISSION_DIR);
 370                         break;
 371
 372                 case ML_CDROM:
 373                         songs_stop_redbook();           //so we can read from the CD
 374                         strcpy(filename2,CDROM_dir);
 375                         break;
 376
 377                 default:
 378                         Int3();         //fall through
 379
 380                 case ML_CURDIR:
 381                         strcpy(filename2,"");
 382                         break;
 383         }
 384         strcat(filename2,filename);
 385
 386         mfile = cfopen(filename2,"rb");
 387
 388         if (mfile) {
 389                 char *p;
 390                 char temp[FILENAME_LEN],*t;
 391
 392                 strcpy(temp,filename);
 393                 if ((t = strchr(temp,'.')) == NULL)
 394                         return 0;       //missing extension
 395                 // look if it's .mn2 or .msn
 396                 Mission_list[count].descent_version = (t[3] == '2') ? 2 : 1;
 397                 *t = 0;                 //kill extension
 398
 399                 strncpy( Mission_list[count].filename, temp, 9 );
 400                 Mission_list[count].anarchy_only_flag = 0;
 401                 Mission_list[count].location = location;
 402
 403                 p = get_parm_value("name",mfile);
 404
 405                 if (!p) {               //try enhanced mission
 406                         cfseek(mfile,0,SEEK_SET);
 407                         p = get_parm_value("xname",mfile);
 408                 }
 409
 410                 if (HoardEquipped())
 411                 {
 412                         if (!p) {               //try super-enhanced mission!
 413                                 cfseek(mfile,0,SEEK_SET);
 414                                 p = get_parm_value("zname",mfile);
 415                         }
 416                 }
 417
 418                 if (p) {
 419                         char *t;
 420                         if ((t=strchr(p,';'))!=NULL)
 421                                 *t=0;
 422                         t = p + strlen(p)-1;
 423                         while (isspace(*t)) t--;
 424                         strncpy(Mission_list[count].mission_name,p,MISSION_NAME_LEN);
 425                 }
 426                 else {
 427                         cfclose(mfile);
 428                         return 0;
 429                 }
 430
 431                 p = get_parm_value("type",mfile);
 432
 433                 //get mission type
 434                 if (p)
 435                         Mission_list[count].anarchy_only_flag = istok(p,"anarchy");
 436
 437                 cfclose(mfile);
 438
 439                 return 1;
 440         }
 441
 442         return 0;
 443 }
 444
 445 void add_d1_builtin_mission_to_list(int *count)
 446 {
 447         if (!cfexist("descent.hog"))
 448                 return;
 449
 450         D1_Builtin_mission_hogsize = cfile_size("descent.hog");
 451
 452         switch (D1_Builtin_mission_hogsize) {
 453         default:
 454                 Warning("Unknown D1 hogsize %d\n", D1_Builtin_mission_hogsize);
 455                 Int3();
 456                 // fall through
 457         case D1_SHAREWARE_MISSION_HOGSIZE:
 458                 strcpy(Mission_list[*count].filename, D1_MISSION_FILENAME);
 459                 strcpy(Mission_list[*count].mission_name, D1_SHAREWARE_MISSION_NAME);
 460                 Mission_list[*count].anarchy_only_flag = 0;
 461                 break;
 462         case D1_MISSION_HOGSIZE:
 463                 strcpy(Mission_list[*count].filename, D1_MISSION_FILENAME);
 464                 strcpy(Mission_list[*count].mission_name, D1_MISSION_NAME);
 465                 Mission_list[*count].anarchy_only_flag = 0;
 466                 break;
 467         }
 468
 469         strcpy(D1_Builtin_mission_filename, Mission_list[*count].filename);
 470         Mission_list[*count].descent_version = 1;
 471         Mission_list[*count].anarchy_only_flag = 0;
 472         ++(*count);
 473 }
 474
 475
 476 void add_builtin_mission_to_list(int *count)
 477 {
 478         Builtin_mission_hogsize = cfile_size("descent2.hog");
 479         if (Builtin_mission_hogsize == -1)
 480                 Builtin_mission_hogsize = cfile_size("d2demo.hog");
 481
 482         switch (Builtin_mission_hogsize) {
 483         case SHAREWARE_MISSION_HOGSIZE:
 484         case MAC_SHARE_MISSION_HOGSIZE:
 485                 strcpy(Mission_list[*count].filename,SHAREWARE_MISSION_FILENAME);
 486                 strcpy(Mission_list[*count].mission_name,SHAREWARE_MISSION_NAME);
 487                 Mission_list[*count].anarchy_only_flag = 0;
 488                 break;
 489         case OEM_MISSION_HOGSIZE:
 490                 strcpy(Mission_list[*count].filename,OEM_MISSION_FILENAME);
 491                 strcpy(Mission_list[*count].mission_name,OEM_MISSION_NAME);
 492                 Mission_list[*count].anarchy_only_flag = 0;
 493                 break;
 494         default:
 495                 Warning("Unknown hogsize %d, trying %s\n", Builtin_mission_hogsize, FULL_MISSION_FILENAME ".mn2");
 496                 Int3(); //fall through
 497         case FULL_MISSION_HOGSIZE:
 498                 if (!read_mission_file(FULL_MISSION_FILENAME ".mn2", 0, ML_CURDIR))
 499                         Error("Could not find required mission file <%s>", FULL_MISSION_FILENAME ".mn2");
 500         }
 501
 502         strcpy(Builtin_mission_filename, Mission_list[*count].filename);
 503         Mission_list[*count].descent_version = 2;
 504         Mission_list[*count].anarchy_only_flag = 0;
 505         ++(*count);
 506 }
 507
 508
 509 void add_missions_to_list(char *search_name, int *count, int anarchy_mode)
 510 {
 511         FILEFINDSTRUCT find;
 512         if( !FileFindFirst( search_name, &find ) ) {
 513                 do      {
 514                         if (read_mission_file( find.name, *count, ML_MISSIONDIR )) {
 515
 516                                 if (anarchy_mode || !Mission_list[*count].anarchy_only_flag)
 517                                         ++(*count);
 518                         }
 519
 520                 } while( !FileFindNext( &find ) && *count < MAX_MISSIONS);
 521                 FileFindClose();
 522                 if (*count >= MAX_MISSIONS)
 523                         mprintf((0, "Warning: more missions than d2x can handle\n"));
 524         }
 525 }
 526
 527 /* move <mission_name> to <place> on mission list, increment <place> */
 528 void promote (char * mission_name, int * top_place, int num_missions)
 529 {
 530         int i;
 531         char name[FILENAME_LEN], * t;
 532         strcpy(name, mission_name);
 533         if ((t = strchr(name,'.')) != NULL)
 534                 *t = 0; //kill extension
 535         //printf("promoting: %s\n", name);
 536         for (i = *top_place; i < num_missions; i++)
 537                 if (!stricmp(Mission_list[i].filename, name)) {
 538                         //swap mission positions
 539                         mle temp;
 540
 541                         temp = Mission_list[*top_place];
 542                         Mission_list[*top_place] = Mission_list[i];
 543                         Mission_list[i] = temp;
 544                         ++(*top_place);
 545                         break;
 546                 }
 547 }
 548
 549
 550
 551 //fills in the global list of missions.  Returns the number of missions
 552 //in the list.  If anarchy_mode set, don't include non-anarchy levels.
 553
 554 extern char CDROM_dir[];
 555 extern char AltHogDir[];
 556 extern char AltHogdir_initialized;
 557
 558 int build_mission_list(int anarchy_mode)
 559 {
 560         static int num_missions=-1;
 561         int count = 0;
 562         int top_place;
 563
 564         //now search for levels on disk
 565
 566 //@@Took out this code because after this routine was called once for
 567 //@@a list of single-player missions, a subsequent call for a list of
 568 //@@anarchy missions would not scan again, and thus would not find the
 569 //@@anarchy-only missions.  If we retain the minimum level of install,
 570 //@@we may want to put the code back in, having it always scan for all
 571 //@@missions, and have the code that uses it sort out the ones it wants.
 572 //@@    if (num_missions != -1) {
 573 //@@            if (Current_mission_num != 0)
 574 //@@                    load_mission(0);                                //set built-in mission as default
 575 //@@            return num_missions;
 576 //@@    }
 577
 578         add_builtin_mission_to_list(&count);  //read built-in first
 579         add_d1_builtin_mission_to_list(&count);
 580         add_missions_to_list(MISSION_DIR "*.mn2", &count, anarchy_mode);
 581         add_missions_to_list(MISSION_DIR "*.msn", &count, anarchy_mode);
 582
 583         if (AltHogdir_initialized) {
 584                 char search_name[PATH_MAX + 5];
 585                 strcpy(search_name, AltHogDir);
 586                 strcat(search_name, "/" MISSION_DIR "*.mn2");
 587                 add_missions_to_list(search_name, &count, anarchy_mode);
 588                 strcpy(search_name, AltHogDir);
 589                 strcat(search_name, "/" MISSION_DIR "*.msn");
 590                 add_missions_to_list(search_name, &count, anarchy_mode);
 591         }
 592
 593         // move original missions (in story-chronological order)
 594         // to top of mission list
 595         top_place = 0;
 596         promote("descent", &top_place, count); // original descent 1 mission
 597         D1_Builtin_mission_num = top_place - 1;
 598         promote(Builtin_mission_filename, &top_place, count); // d2 or d2demo
 599         Builtin_mission_num = top_place - 1;
 600         promote("d2x", &top_place, count); // vertigo
 601
 602         if (count > top_place)
 603                 qsort(&Mission_list[top_place],
 604                       count - top_place,
 605                       sizeof(*Mission_list),
 606                                 (int (*)( const void *, const void * ))ml_sort_func);
 607
 608
 609         if (count > top_place)
 610                 qsort(&Mission_list[top_place],
 611                       count - top_place,
 612                       sizeof(*Mission_list),
 613                       (int (*)( const void *, const void * ))ml_sort_func);
 614
 615         //load_mission(0);   //set built-in mission as default
 616
 617         num_missions = count;
 618
 619         return count;
 620 }
 621
 622 void init_extra_robot_movie(char *filename);
 623
 624 //values for built-in mission
 625
 626 //loads the specfied mission from the mission list.
 627 //build_mission_list() must have been called.
 628 //Returns true if mission loaded ok, else false.
 629 int load_mission(int mission_num)
 630 {
 631         CFILE *mfile;
 632         char buf[80], *v;
 633         int found_hogfile;
 634         int enhanced_mission = 0;
 635
 636         if (mission_num == D1_Builtin_mission_num) {
 637                 cfile_use_descent1_hogfile("descent.hog");
 638                 switch (D1_Builtin_mission_hogsize) {
 639                 case D1_MISSION_HOGSIZE:
 640                 case D1_SHAREWARE_MISSION_HOGSIZE:
 641                         return load_mission_d1(mission_num);
 642                         break;
 643                 default:
 644                         // continue on...
 645                 }
 646         }
 647
 648         if (mission_num == Builtin_mission_num) {
 649                 switch (Builtin_mission_hogsize) {
 650                 case SHAREWARE_MISSION_HOGSIZE:
 651                 case MAC_SHARE_MISSION_HOGSIZE:
 652                         return load_mission_shareware(mission_num);
 653                         break;
 654                 case OEM_MISSION_HOGSIZE:
 655                         return load_mission_oem(mission_num);
 656                         break;
 657                 case FULL_MISSION_HOGSIZE:
 658                 default:
 659                         // continue on...
 660                 }
 661         }
 662
 663         Current_mission_num = mission_num;
 664
 665         mprintf(( 0, "Loading mission %d\n", mission_num ));
 666
 667         //read mission from file
 668
 669         switch (Mission_list[mission_num].location) {
 670         case ML_MISSIONDIR:
 671                 strcpy(buf,MISSION_DIR);
 672                 break;
 673         case ML_CDROM:
 674                 strcpy(buf,CDROM_dir);
 675                 break;
 676         default:
 677                 Int3();                                                 //fall through
 678         case ML_CURDIR:
 679                 strcpy(buf,"");
 680                 break;
 681         }
 682         strcat(buf,Mission_list[mission_num].filename);
 683         if (Mission_list[mission_num].descent_version == 2)
 684                 strcat(buf,".mn2");
 685         else
 686                 strcat(buf,".msn");
 687
 688         mfile = cfopen(buf,"rb");
 689         if (mfile == NULL) {
 690                 Current_mission_num = -1;
 691                 return 0;               //error!
 692         }
 693
 694         //for non-builtin missions, load HOG
 695         if (strcmp(Mission_list[mission_num].filename, Builtin_mission_filename)) {
 696
 697                 strcpy(buf+strlen(buf)-4,".hog");               //change extension
 698
 699                 found_hogfile = cfile_use_alternate_hogfile(buf);
 700
 701                 #ifdef RELEASE                          //for release, require mission to be in hogfile
 702                 if (! found_hogfile) {
 703                         cfclose(mfile);
 704                         Current_mission_num = -1;
 705                         return 0;
 706                 }
 707                 #endif
 708
 709                 // for Descent 1 missions, load descent.hog
 710                 if (Mission_list[mission_num].descent_version == 1 && strcmp(buf, "descent.hog"))
 711                         if (!cfile_use_descent1_hogfile("descent.hog"))
 712                                 Warning("descent.hog not available, this mission may be missing some files required for briefings\n");
 713         }
 714
 715         //init vars
 716         Last_level = 0;
 717         Last_secret_level = 0;
 718         Briefing_text_filename[0] = 0;
 719         Ending_text_filename[0] = 0;
 720
 721         while (mfgets(buf,80,mfile)) {
 722
 723                 if (istok(buf,"name"))
 724                         continue;                                               //already have name, go to next line
 725                 if (istok(buf,"xname")) {
 726                         enhanced_mission = 1;
 727                         continue;                                               //already have name, go to next line
 728                 }
 729                 if (istok(buf,"zname")) {
 730                         enhanced_mission = 2;
 731                         continue;                                               //already have name, go to next line
 732                 }
 733                 else if (istok(buf,"type"))
 734                         continue;                                               //already have name, go to next line
 735                 else if (istok(buf,"hog")) {
 736                         char    *bufp = buf;
 737
 738                         while (*(bufp++) != '=')
 739                                 ;
 740
 741                         if (*bufp == ' ')
 742                                 while (*(++bufp) == ' ')
 743                                         ;
 744
 745                         cfile_use_alternate_hogfile(bufp);
 746                         mprintf((0, "Hog file override = [%s]\n", bufp));
 747                 }
 748                 else if (istok(buf,"briefing")) {
 749                         if ((v = get_value(buf)) != NULL) {
 750                                 add_term(v);
 751                                 if (strlen(v) < 13)
 752                                         strcpy(Briefing_text_filename,v);
 753                         }
 754                 }
 755                 else if (istok(buf,"ending")) {
 756                         if ((v = get_value(buf)) != NULL) {
 757                                 add_term(v);
 758                                 if (strlen(v) < 13)
 759                                         strcpy(Ending_text_filename,v);
 760                         }
 761                 }
 762                 else if (istok(buf,"num_levels")) {
 763
 764                         if ((v=get_value(buf))!=NULL) {
 765                                 int n_levels,i;
 766
 767                                 n_levels = atoi(v);
 768
 769                                 for (i=0;i<n_levels && mfgets(buf,80,mfile);i++) {
 770
 771                                         add_term(buf);
 772                                         if (strlen(buf) <= 12) {
 773                                                 strcpy(Level_names[i],buf);
 774                                                 Last_level++;
 775                                         }
 776                                         else
 777                                                 break;
 778                                 }
 779
 780                         }
 781                 }
 782                 else if (istok(buf,"num_secrets")) {
 783                         if ((v=get_value(buf))!=NULL) {
 784                                 int i;
 785
 786                                 N_secret_levels = atoi(v);
 787
 788                                 Assert(N_secret_levels <= MAX_SECRET_LEVELS_PER_MISSION);
 789
 790                                 for (i=0;i<N_secret_levels && mfgets(buf,80,mfile);i++) {
 791                                         char *t;
 792
 793
 794                                         if ((t=strchr(buf,','))!=NULL) *t++=0;
 795                                         else
 796                                                 break;
 797
 798                                         add_term(buf);
 799                                         if (strlen(buf) <= 12) {
 800                                                 strcpy(Secret_level_names[i],buf);
 801                                                 Secret_level_table[i] = atoi(t);
 802                                                 if (Secret_level_table[i]<1 || Secret_level_table[i]>Last_level)
 803                                                         break;
 804                                                 Last_secret_level--;
 805                                         }
 806                                         else
 807                                                 break;
 808                                 }
 809
 810                         }
 811                 }
 812
 813         }
 814
 815         cfclose(mfile);
 816
 817         if (Last_level <= 0) {
 818                 Current_mission_num = -1;               //no valid mission loaded
 819                 return 0;
 820         }
 821
 822         Current_mission_filename = Mission_list[Current_mission_num].filename;
 823         Current_mission_longname = Mission_list[Current_mission_num].mission_name;
 824
 825         if (enhanced_mission) {
 826                 char t[50];
 827                 extern void bm_read_extra_robots();
 828                 sprintf(t,"%s.ham",Current_mission_filename);
 829                 bm_read_extra_robots(t,enhanced_mission);
 830                 strncpy(t,Current_mission_filename,6);
 831                 strcat(t,"-l.mvl");
 832                 init_extra_robot_movie(t);
 833         }
 834
 835         return 1;
 836 }
 837
 838 //loads the named mission if exists.
 839 //Returns true if mission loaded ok, else false.
 840 int load_mission_by_name(char *mission_name)
 841 {
 842         int n,i;
 843
 844         n = build_mission_list(1);
 845
 846         for (i=0;i<n;i++)
 847                 if (!stricmp(mission_name,Mission_list[i].filename))
 848                         return load_mission(i);
 849
 850         return 0;               //couldn't find mission
 851 }