main/mission.c

   1 /* $Id: mission.c,v 1.21 2003-03-14 09:17:08 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                 N_secret_levels = 1;
 201
 202                 Last_level = 15;
 203                 Last_secret_level = -1;
 204
 205                 //build level names
 206                 for (i=0; i < Last_level - 1; i++)
 207                         sprintf(Level_names[i], "level%02d.rdl", i+1);
 208                 sprintf(Level_names[i], "saturn%02d.rdl", i+1);
 209                 for (i=0; i < -Last_secret_level; i++)
 210                         sprintf(Secret_level_names[i], "levels%1d.rdl", i+1);
 211
 212                 Secret_level_table[0] = 10;
 213
 214                 break;
 215         default:
 216                 Int3(); // fall through
 217         case D1_MISSION_HOGSIZE:
 218         case D1_10_MISSION_HOGSIZE:
 219         case D1_MAC_MISSION_HOGSIZE:
 220                 N_secret_levels = 3;
 221
 222                 Last_level = BIM_LAST_LEVEL;
 223                 Last_secret_level = BIM_LAST_SECRET_LEVEL;
 224
 225                 //build level names
 226                 for (i=0;i<Last_level;i++)
 227                         sprintf(Level_names[i], "level%02d.rdl", i+1);
 228                 for (i=0;i<-Last_secret_level;i++)
 229                         sprintf(Secret_level_names[i], "levels%1d.rdl", i+1);
 230
 231                 Secret_level_table[0] = 10;
 232                 Secret_level_table[1] = 21;
 233                 Secret_level_table[2] = 24;
 234
 235                 break;
 236         }
 237         strcpy(Briefing_text_filename,BIM_BRIEFING_FILE);
 238         strcpy(Ending_text_filename,BIM_ENDING_FILE);
 239
 240         return 1;
 241 }
 242
 243
 244 //
 245 //  Special versions of mission routines for shareware
 246 //
 247
 248 int load_mission_shareware(int mission_num)
 249 {
 250         Current_mission_num = mission_num;
 251         Current_mission_filename = Mission_list[mission_num].filename;
 252         Current_mission_longname = Mission_list[mission_num].mission_name;
 253
 254         N_secret_levels = 0;
 255
 256         Last_level = 3;
 257         Last_secret_level = 0;
 258
 259         switch (Builtin_mission_hogsize) {
 260         case MAC_SHARE_MISSION_HOGSIZE:
 261                 // mac demo is using the regular hog and rl2 files
 262                 strcpy(Level_names[0],"d2leva-1.rl2");
 263                 strcpy(Level_names[1],"d2leva-2.rl2");
 264                 strcpy(Level_names[2],"d2leva-3.rl2");
 265                 break;
 266         default:
 267                 Int3(); // fall through
 268         case SHAREWARE_MISSION_HOGSIZE:
 269                 strcpy(Level_names[0],"d2leva-1.sl2");
 270                 strcpy(Level_names[1],"d2leva-2.sl2");
 271                 strcpy(Level_names[2],"d2leva-3.sl2");
 272         }
 273
 274         return 1;
 275 }
 276
 277
 278 //
 279 //  Special versions of mission routines for Diamond/S3 version
 280 //
 281
 282 int load_mission_oem(int mission_num)
 283 {
 284         Current_mission_num = mission_num;
 285         Current_mission_filename = Mission_list[mission_num].filename;
 286         Current_mission_longname = Mission_list[mission_num].mission_name;
 287
 288         N_secret_levels = 2;
 289
 290         Last_level = 8;
 291         Last_secret_level = -2;
 292
 293         strcpy(Level_names[0],"d2leva-1.rl2");
 294         strcpy(Level_names[1],"d2leva-2.rl2");
 295         strcpy(Level_names[2],"d2leva-3.rl2");
 296         strcpy(Level_names[3],"d2leva-4.rl2");
 297
 298         strcpy(Secret_level_names[0],"d2leva-s.rl2");
 299
 300         strcpy(Level_names[4],"d2levb-1.rl2");
 301         strcpy(Level_names[5],"d2levb-2.rl2");
 302         strcpy(Level_names[6],"d2levb-3.rl2");
 303         strcpy(Level_names[7],"d2levb-4.rl2");
 304
 305         strcpy(Secret_level_names[1],"d2levb-s.rl2");
 306
 307         Secret_level_table[0] = 1;
 308         Secret_level_table[1] = 5;
 309
 310         return 1;
 311 }
 312
 313
 314 //strips damn newline from end of line
 315 char *mfgets(char *s,int n,CFILE *f)
 316 {
 317         char *r;
 318
 319         r = cfgets(s,n,f);
 320         if (r && s[strlen(s)-1] == '\n')
 321                 s[strlen(s)-1] = 0;
 322
 323         return r;
 324 }
 325
 326 //compare a string for a token. returns true if match
 327 int istok(char *buf,char *tok)
 328 {
 329         return strnicmp(buf,tok,strlen(tok)) == 0;
 330
 331 }
 332
 333 //adds a terminating 0 after a string at the first white space
 334 void add_term(char *s)
 335 {
 336         while (*s && !isspace(*s)) s++;
 337
 338         *s = 0;         //terminate!
 339 }
 340
 341 //returns ptr to string after '=' & white space, or NULL if no '='
 342 //adds 0 after parm at first white space
 343 char *get_value(char *buf)
 344 {
 345         char *t;
 346
 347         t = strchr(buf,'=')+1;
 348
 349         if (t) {
 350                 while (*t && isspace(*t)) t++;
 351
 352                 if (*t)
 353                         return t;
 354         }
 355
 356         return NULL;            //error!
 357 }
 358
 359 //reads a line, returns ptr to value of passed parm.  returns NULL if none
 360 char *get_parm_value(char *parm,CFILE *f)
 361 {
 362         static char buf[80];
 363
 364         if (!mfgets(buf,80,f))
 365                 return NULL;
 366
 367         if (istok(buf,parm))
 368                 return get_value(buf);
 369         else
 370                 return NULL;
 371 }
 372
 373 int ml_sort_func(mle *e0,mle *e1)
 374 {
 375         return stricmp(e0->mission_name,e1->mission_name);
 376
 377 }
 378
 379 extern char CDROM_dir[];
 380
 381 //returns 1 if file read ok, else 0
 382 int read_mission_file(char *filename,int count,int location)
 383 {
 384         char filename2[100];
 385         CFILE *mfile;
 386
 387         //printf("reading: %s\n", filename);
 388
 389         switch (location) {
 390                 case ML_MISSIONDIR:
 391                         strcpy(filename2,MISSION_DIR);
 392                         break;
 393
 394                 case ML_CDROM:
 395                         songs_stop_redbook();           //so we can read from the CD
 396                         strcpy(filename2,CDROM_dir);
 397                         break;
 398
 399                 default:
 400                         Int3();         //fall through
 401
 402                 case ML_CURDIR:
 403                         strcpy(filename2,"");
 404                         break;
 405         }
 406         strcat(filename2,filename);
 407
 408         mfile = cfopen(filename2,"rb");
 409
 410         if (mfile) {
 411                 char *p;
 412                 char temp[FILENAME_LEN],*t;
 413
 414                 strcpy(temp,filename);
 415                 if ((t = strchr(temp,'.')) == NULL)
 416                         return 0;       //missing extension
 417                 // look if it's .mn2 or .msn
 418                 Mission_list[count].descent_version = (t[3] == '2') ? 2 : 1;
 419                 *t = 0;                 //kill extension
 420
 421                 strncpy( Mission_list[count].filename, temp, 9 );
 422                 Mission_list[count].anarchy_only_flag = 0;
 423                 Mission_list[count].location = location;
 424
 425                 p = get_parm_value("name",mfile);
 426
 427                 if (!p) {               //try enhanced mission
 428                         cfseek(mfile,0,SEEK_SET);
 429                         p = get_parm_value("xname",mfile);
 430                 }
 431
 432                 if (!p) {       //try super-enhanced mission!
 433                         cfseek(mfile,0,SEEK_SET);
 434                         p = get_parm_value("zname",mfile);
 435                 }
 436
 437                 if (p) {
 438                         char *t;
 439                         if ((t=strchr(p,';'))!=NULL)
 440                                 *t=0;
 441                         t = p + strlen(p)-1;
 442                         while (isspace(*t)) t--;
 443                         strncpy(Mission_list[count].mission_name,p,MISSION_NAME_LEN);
 444                 }
 445                 else {
 446                         cfclose(mfile);
 447                         return 0;
 448                 }
 449
 450                 p = get_parm_value("type",mfile);
 451
 452                 //get mission type
 453                 if (p)
 454                         Mission_list[count].anarchy_only_flag = istok(p,"anarchy");
 455
 456                 cfclose(mfile);
 457
 458                 return 1;
 459         }
 460
 461         return 0;
 462 }
 463
 464 void add_d1_builtin_mission_to_list(int *count)
 465 {
 466         if (!cfexist("descent.hog"))
 467                 return;
 468
 469         D1_Builtin_mission_hogsize = cfile_size("descent.hog");
 470
 471         switch (D1_Builtin_mission_hogsize) {
 472         case D1_SHAREWARE_MISSION_HOGSIZE:
 473         case D1_SHAREWARE_10_MISSION_HOGSIZE:
 474         case D1_MAC_SHARE_MISSION_HOGSIZE:
 475                 strcpy(Mission_list[*count].filename, D1_MISSION_FILENAME);
 476                 strcpy(Mission_list[*count].mission_name, D1_SHAREWARE_MISSION_NAME);
 477                 Mission_list[*count].anarchy_only_flag = 0;
 478                 break;
 479         case D1_OEM_MISSION_HOGSIZE:
 480                 strcpy(Mission_list[*count].filename, D1_MISSION_FILENAME);
 481                 strcpy(Mission_list[*count].mission_name, D1_OEM_MISSION_NAME);
 482                 Mission_list[*count].anarchy_only_flag = 0;
 483                 break;
 484         default:
 485                 Warning("Unknown D1 hogsize %d\n", D1_Builtin_mission_hogsize);
 486                 Int3();
 487                 // fall through
 488         case D1_MISSION_HOGSIZE:
 489         case D1_10_MISSION_HOGSIZE:
 490         case D1_MAC_MISSION_HOGSIZE:
 491                 strcpy(Mission_list[*count].filename, D1_MISSION_FILENAME);
 492                 strcpy(Mission_list[*count].mission_name, D1_MISSION_NAME);
 493                 Mission_list[*count].anarchy_only_flag = 0;
 494                 break;
 495         }
 496
 497         strcpy(D1_Builtin_mission_filename, Mission_list[*count].filename);
 498         Mission_list[*count].descent_version = 1;
 499         Mission_list[*count].anarchy_only_flag = 0;
 500         ++(*count);
 501 }
 502
 503
 504 void add_builtin_mission_to_list(int *count)
 505 {
 506         Builtin_mission_hogsize = cfile_size("descent2.hog");
 507         if (Builtin_mission_hogsize == -1)
 508                 Builtin_mission_hogsize = cfile_size("d2demo.hog");
 509
 510         switch (Builtin_mission_hogsize) {
 511         case SHAREWARE_MISSION_HOGSIZE:
 512         case MAC_SHARE_MISSION_HOGSIZE:
 513                 strcpy(Mission_list[*count].filename,SHAREWARE_MISSION_FILENAME);
 514                 strcpy(Mission_list[*count].mission_name,SHAREWARE_MISSION_NAME);
 515                 Mission_list[*count].anarchy_only_flag = 0;
 516                 break;
 517         case OEM_MISSION_HOGSIZE:
 518                 strcpy(Mission_list[*count].filename,OEM_MISSION_FILENAME);
 519                 strcpy(Mission_list[*count].mission_name,OEM_MISSION_NAME);
 520                 Mission_list[*count].anarchy_only_flag = 0;
 521                 break;
 522         default:
 523                 Warning("Unknown hogsize %d, trying %s\n", Builtin_mission_hogsize, FULL_MISSION_FILENAME ".mn2");
 524                 Int3(); //fall through
 525         case FULL_MISSION_HOGSIZE:
 526         case MAC_FULL_MISSION_HOGSIZE:
 527                 if (!read_mission_file(FULL_MISSION_FILENAME ".mn2", 0, ML_CURDIR))
 528                         Error("Could not find required mission file <%s>", FULL_MISSION_FILENAME ".mn2");
 529         }
 530
 531         strcpy(Builtin_mission_filename, Mission_list[*count].filename);
 532         Mission_list[*count].descent_version = 2;
 533         Mission_list[*count].anarchy_only_flag = 0;
 534         ++(*count);
 535 }
 536
 537
 538 void add_missions_to_list(char *search_name, int *count, int anarchy_mode)
 539 {
 540         FILEFINDSTRUCT find;
 541         if( !FileFindFirst( search_name, &find ) ) {
 542                 do      {
 543                         if (read_mission_file( find.name, *count, ML_MISSIONDIR )) {
 544
 545                                 if (anarchy_mode || !Mission_list[*count].anarchy_only_flag)
 546                                         ++(*count);
 547                         }
 548
 549                 } while( !FileFindNext( &find ) && *count < MAX_MISSIONS);
 550                 FileFindClose();
 551                 if (*count >= MAX_MISSIONS)
 552                         mprintf((0, "Warning: more missions than d2x can handle\n"));
 553         }
 554 }
 555
 556 /* move <mission_name> to <place> on mission list, increment <place> */
 557 void promote (char * mission_name, int * top_place, int num_missions)
 558 {
 559         int i;
 560         char name[FILENAME_LEN], * t;
 561         strcpy(name, mission_name);
 562         if ((t = strchr(name,'.')) != NULL)
 563                 *t = 0; //kill extension
 564         //printf("promoting: %s\n", name);
 565         for (i = *top_place; i < num_missions; i++)
 566                 if (!stricmp(Mission_list[i].filename, name)) {
 567                         //swap mission positions
 568                         mle temp;
 569
 570                         temp = Mission_list[*top_place];
 571                         Mission_list[*top_place] = Mission_list[i];
 572                         Mission_list[i] = temp;
 573                         ++(*top_place);
 574                         break;
 575                 }
 576 }
 577
 578
 579
 580 //fills in the global list of missions.  Returns the number of missions
 581 //in the list.  If anarchy_mode set, don't include non-anarchy levels.
 582
 583 extern char CDROM_dir[];
 584 extern char AltHogDir[];
 585 extern char AltHogdir_initialized;
 586
 587 int build_mission_list(int anarchy_mode)
 588 {
 589         static int num_missions=-1;
 590         int count = 0;
 591         int top_place;
 592
 593         //now search for levels on disk
 594
 595 //@@Took out this code because after this routine was called once for
 596 //@@a list of single-player missions, a subsequent call for a list of
 597 //@@anarchy missions would not scan again, and thus would not find the
 598 //@@anarchy-only missions.  If we retain the minimum level of install,
 599 //@@we may want to put the code back in, having it always scan for all
 600 //@@missions, and have the code that uses it sort out the ones it wants.
 601 //@@    if (num_missions != -1) {
 602 //@@            if (Current_mission_num != 0)
 603 //@@                    load_mission(0);                                //set built-in mission as default
 604 //@@            return num_missions;
 605 //@@    }
 606
 607         add_builtin_mission_to_list(&count);  //read built-in first
 608         add_d1_builtin_mission_to_list(&count);
 609         add_missions_to_list(MISSION_DIR "*.mn2", &count, anarchy_mode);
 610         add_missions_to_list(MISSION_DIR "*.msn", &count, anarchy_mode);
 611
 612         if (AltHogdir_initialized) {
 613                 char search_name[PATH_MAX + 5];
 614                 strcpy(search_name, AltHogDir);
 615                 strcat(search_name, "/" MISSION_DIR "*.mn2");
 616                 add_missions_to_list(search_name, &count, anarchy_mode);
 617                 strcpy(search_name, AltHogDir);
 618                 strcat(search_name, "/" MISSION_DIR "*.msn");
 619                 add_missions_to_list(search_name, &count, anarchy_mode);
 620         }
 621
 622         // move original missions (in story-chronological order)
 623         // to top of mission list
 624         top_place = 0;
 625         promote("descent", &top_place, count); // original descent 1 mission
 626         D1_Builtin_mission_num = top_place - 1;
 627         promote(Builtin_mission_filename, &top_place, count); // d2 or d2demo
 628         Builtin_mission_num = top_place - 1;
 629         promote("d2x", &top_place, count); // vertigo
 630
 631         if (count > top_place)
 632                 qsort(&Mission_list[top_place],
 633                       count - top_place,
 634                       sizeof(*Mission_list),
 635                                 (int (*)( const void *, const void * ))ml_sort_func);
 636
 637
 638         if (count > top_place)
 639                 qsort(&Mission_list[top_place],
 640                       count - top_place,
 641                       sizeof(*Mission_list),
 642                       (int (*)( const void *, const void * ))ml_sort_func);
 643
 644         //load_mission(0);   //set built-in mission as default
 645
 646         num_missions = count;
 647
 648         return count;
 649 }
 650
 651 void init_extra_robot_movie(char *filename);
 652
 653 //values for built-in mission
 654
 655 //loads the specfied mission from the mission list.
 656 //build_mission_list() must have been called.
 657 //Returns true if mission loaded ok, else false.
 658 int load_mission(int mission_num)
 659 {
 660         CFILE *mfile;
 661         char buf[80], *v;
 662         int found_hogfile;
 663         int enhanced_mission = 0;
 664
 665         if (mission_num == D1_Builtin_mission_num) {
 666                 cfile_use_descent1_hogfile("descent.hog");
 667                 switch (D1_Builtin_mission_hogsize) {
 668                 default:
 669                         Int3(); // fall through
 670                 case D1_MISSION_HOGSIZE:
 671                 case D1_10_MISSION_HOGSIZE:
 672                 case D1_MAC_MISSION_HOGSIZE:
 673                 case D1_OEM_MISSION_HOGSIZE:
 674                 case D1_SHAREWARE_MISSION_HOGSIZE:
 675                 case D1_SHAREWARE_10_MISSION_HOGSIZE:
 676                 case D1_MAC_SHARE_MISSION_HOGSIZE:
 677                         return load_mission_d1(mission_num);
 678                         break;
 679                 }
 680         }
 681
 682         if (mission_num == Builtin_mission_num) {
 683                 switch (Builtin_mission_hogsize) {
 684                 case SHAREWARE_MISSION_HOGSIZE:
 685                 case MAC_SHARE_MISSION_HOGSIZE:
 686                         return load_mission_shareware(mission_num);
 687                         break;
 688                 case OEM_MISSION_HOGSIZE:
 689                         return load_mission_oem(mission_num);
 690                         break;
 691                 default:
 692                         Int3(); // fall through
 693                 case FULL_MISSION_HOGSIZE:
 694                 case MAC_FULL_MISSION_HOGSIZE:
 695                         // continue on... (use d2.mn2 from hogfile)
 696                         break;
 697                 }
 698         }
 699
 700         Current_mission_num = mission_num;
 701
 702         mprintf(( 0, "Loading mission %d\n", mission_num ));
 703
 704         //read mission from file
 705
 706         switch (Mission_list[mission_num].location) {
 707         case ML_MISSIONDIR:
 708                 strcpy(buf,MISSION_DIR);
 709                 break;
 710         case ML_CDROM:
 711                 strcpy(buf,CDROM_dir);
 712                 break;
 713         default:
 714                 Int3();                                                 //fall through
 715         case ML_CURDIR:
 716                 strcpy(buf,"");
 717                 break;
 718         }
 719         strcat(buf,Mission_list[mission_num].filename);
 720         if (Mission_list[mission_num].descent_version == 2)
 721                 strcat(buf,".mn2");
 722         else
 723                 strcat(buf,".msn");
 724
 725         mfile = cfopen(buf,"rb");
 726         if (mfile == NULL) {
 727                 Current_mission_num = -1;
 728                 return 0;               //error!
 729         }
 730
 731         //for non-builtin missions, load HOG
 732         if (strcmp(Mission_list[mission_num].filename, Builtin_mission_filename)) {
 733
 734                 strcpy(buf+strlen(buf)-4,".hog");               //change extension
 735
 736                 found_hogfile = cfile_use_alternate_hogfile(buf);
 737
 738                 #ifdef RELEASE                          //for release, require mission to be in hogfile
 739                 if (! found_hogfile) {
 740                         cfclose(mfile);
 741                         Current_mission_num = -1;
 742                         return 0;
 743                 }
 744                 #endif
 745
 746                 // for Descent 1 missions, load descent.hog
 747                 if (Mission_list[mission_num].descent_version == 1 && strcmp(buf, "descent.hog"))
 748                         if (!cfile_use_descent1_hogfile("descent.hog"))
 749                                 Warning("descent.hog not available, this mission may be missing some files required for briefings\n");
 750         }
 751
 752         //init vars
 753         Last_level = 0;
 754         Last_secret_level = 0;
 755         Briefing_text_filename[0] = 0;
 756         Ending_text_filename[0] = 0;
 757
 758         while (mfgets(buf,80,mfile)) {
 759
 760                 if (istok(buf,"name"))
 761                         continue;                                               //already have name, go to next line
 762                 if (istok(buf,"xname")) {
 763                         enhanced_mission = 1;
 764                         continue;                                               //already have name, go to next line
 765                 }
 766                 if (istok(buf,"zname")) {
 767                         enhanced_mission = 2;
 768                         continue;                                               //already have name, go to next line
 769                 }
 770                 else if (istok(buf,"type"))
 771                         continue;                                               //already have name, go to next line
 772                 else if (istok(buf,"hog")) {
 773                         char    *bufp = buf;
 774
 775                         while (*(bufp++) != '=')
 776                                 ;
 777
 778                         if (*bufp == ' ')
 779                                 while (*(++bufp) == ' ')
 780                                         ;
 781
 782                         cfile_use_alternate_hogfile(bufp);
 783                         mprintf((0, "Hog file override = [%s]\n", bufp));
 784                 }
 785                 else if (istok(buf,"briefing")) {
 786                         if ((v = get_value(buf)) != NULL) {
 787                                 add_term(v);
 788                                 if (strlen(v) < 13)
 789                                         strcpy(Briefing_text_filename,v);
 790                         }
 791                 }
 792                 else if (istok(buf,"ending")) {
 793                         if ((v = get_value(buf)) != NULL) {
 794                                 add_term(v);
 795                                 if (strlen(v) < 13)
 796                                         strcpy(Ending_text_filename,v);
 797                         }
 798                 }
 799                 else if (istok(buf,"num_levels")) {
 800
 801                         if ((v=get_value(buf))!=NULL) {
 802                                 int n_levels,i;
 803
 804                                 n_levels = atoi(v);
 805
 806                                 for (i=0;i<n_levels && mfgets(buf,80,mfile);i++) {
 807
 808                                         add_term(buf);
 809                                         if (strlen(buf) <= 12) {
 810                                                 strcpy(Level_names[i],buf);
 811                                                 Last_level++;
 812                                         }
 813                                         else
 814                                                 break;
 815                                 }
 816
 817                         }
 818                 }
 819                 else if (istok(buf,"num_secrets")) {
 820                         if ((v=get_value(buf))!=NULL) {
 821                                 int i;
 822
 823                                 N_secret_levels = atoi(v);
 824
 825                                 Assert(N_secret_levels <= MAX_SECRET_LEVELS_PER_MISSION);
 826
 827                                 for (i=0;i<N_secret_levels && mfgets(buf,80,mfile);i++) {
 828                                         char *t;
 829
 830
 831                                         if ((t=strchr(buf,','))!=NULL) *t++=0;
 832                                         else
 833                                                 break;
 834
 835                                         add_term(buf);
 836                                         if (strlen(buf) <= 12) {
 837                                                 strcpy(Secret_level_names[i],buf);
 838                                                 Secret_level_table[i] = atoi(t);
 839                                                 if (Secret_level_table[i]<1 || Secret_level_table[i]>Last_level)
 840                                                         break;
 841                                                 Last_secret_level--;
 842                                         }
 843                                         else
 844                                                 break;
 845                                 }
 846
 847                         }
 848                 }
 849
 850         }
 851
 852         cfclose(mfile);
 853
 854         if (Last_level <= 0) {
 855                 Current_mission_num = -1;               //no valid mission loaded
 856                 return 0;
 857         }
 858
 859         Current_mission_filename = Mission_list[Current_mission_num].filename;
 860         Current_mission_longname = Mission_list[Current_mission_num].mission_name;
 861
 862         if (enhanced_mission) {
 863                 char t[50];
 864                 extern void bm_read_extra_robots();
 865                 sprintf(t,"%s.ham",Current_mission_filename);
 866                 bm_read_extra_robots(t,enhanced_mission);
 867                 strncpy(t,Current_mission_filename,6);
 868                 strcat(t,"-l.mvl");
 869                 init_extra_robot_movie(t);
 870         }
 871
 872         return 1;
 873 }
 874
 875 //loads the named mission if exists.
 876 //Returns true if mission loaded ok, else false.
 877 int load_mission_by_name(char *mission_name)
 878 {
 879         int n,i;
 880
 881         n = build_mission_list(1);
 882
 883         for (i=0;i<n;i++)
 884                 if (!stricmp(mission_name,Mission_list[i].filename))
 885                         return load_mission(i);
 886
 887         return 0;               //couldn't find mission
 888 }