main/mission.c

   1 /* $Id: mission.c,v 1.42 2005-02-25 12:46:24 chris 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  */
  20
  21 #ifdef HAVE_CONFIG_H
  22 #include <conf.h>
  23 #endif
  24
  25 #include <stdio.h>
  26 #include <stdlib.h>
  27 #include <string.h>
  28 #include <ctype.h>
  29 #include <limits.h>
  30
  31 #include "pstypes.h"
  32 #include "cfile.h"
  33
  34 #include "strutil.h"
  35 #include "inferno.h"
  36 #include "mission.h"
  37 #include "gameseq.h"
  38 #include "titles.h"
  39 #include "songs.h"
  40 #include "mono.h"
  41 #include "error.h"
  42 #include "config.h"
  43 #include "newmenu.h"
  44 #include "text.h"
  45 #include "u_mem.h"
  46 #include "ignorecase.h"
  47
  48 //values for d1 built-in mission
  49 #define BIM_LAST_LEVEL          27
  50 #define BIM_LAST_SECRET_LEVEL   -3
  51 #define BIM_BRIEFING_FILE       "briefing.tex"
  52 #define BIM_ENDING_FILE         "endreg.tex"
  53
  54 //mission list entry
  55 typedef struct mle {
  56         char    *filename;          // filename without extension
  57         int     builtin_hogsize;    // if it's the built-in mission, used for determining the version
  58         char    mission_name[MISSION_NAME_LEN+1];
  59         ubyte   descent_version;    // descent 1 or descent 2?
  60         ubyte   anarchy_only_flag;  // if true, mission is anarchy only
  61         char    *path;                          // relative file path
  62         int             location;           // see defines below
  63 } mle;
  64
  65 //values that describe where a mission is located
  66 #define ML_CURDIR       0
  67 #define ML_MISSIONDIR   1
  68 #define ML_CDROM        2
  69
  70 int num_missions = -1;
  71
  72 Mission *Current_mission = NULL; // currently loaded mission
  73
  74 //
  75 //  Special versions of mission routines for d1 builtins
  76 //
  77
  78 int load_mission_d1(void)
  79 {
  80         int i;
  81
  82         switch (cfile_size("descent.hog")) {
  83         case D1_SHAREWARE_MISSION_HOGSIZE:
  84         case D1_SHAREWARE_10_MISSION_HOGSIZE:
  85                 N_secret_levels = 0;
  86
  87                 Last_level = 7;
  88                 Last_secret_level = 0;
  89
  90                 //build level names
  91                 for (i=0;i<Last_level;i++)
  92                         sprintf(Level_names[i], "level%02d.sdl", i+1);
  93
  94                 break;
  95         case D1_MAC_SHARE_MISSION_HOGSIZE:
  96                 N_secret_levels = 0;
  97
  98                 Last_level = 3;
  99                 Last_secret_level = 0;
 100
 101                 //build level names
 102                 for (i=0;i<Last_level;i++)
 103                         sprintf(Level_names[i], "level%02d.sdl", i+1);
 104
 105                 break;
 106         case D1_OEM_MISSION_HOGSIZE:
 107         case D1_OEM_10_MISSION_HOGSIZE:
 108                 N_secret_levels = 1;
 109
 110                 Last_level = 15;
 111                 Last_secret_level = -1;
 112
 113                 //build level names
 114                 for (i=0; i < Last_level - 1; i++)
 115                         sprintf(Level_names[i], "level%02d.rdl", i+1);
 116                 sprintf(Level_names[i], "saturn%02d.rdl", i+1);
 117                 for (i=0; i < -Last_secret_level; i++)
 118                         sprintf(Secret_level_names[i], "levels%1d.rdl", i+1);
 119
 120                 Secret_level_table[0] = 10;
 121
 122                 break;
 123         default:
 124                 Int3(); // fall through
 125         case D1_MISSION_HOGSIZE:
 126         case D1_10_MISSION_HOGSIZE:
 127         case D1_MAC_MISSION_HOGSIZE:
 128                 N_secret_levels = 3;
 129
 130                 Last_level = BIM_LAST_LEVEL;
 131                 Last_secret_level = BIM_LAST_SECRET_LEVEL;
 132
 133                 //build level names
 134                 for (i=0;i<Last_level;i++)
 135                         sprintf(Level_names[i], "level%02d.rdl", i+1);
 136                 for (i=0;i<-Last_secret_level;i++)
 137                         sprintf(Secret_level_names[i], "levels%1d.rdl", i+1);
 138
 139                 Secret_level_table[0] = 10;
 140                 Secret_level_table[1] = 21;
 141                 Secret_level_table[2] = 24;
 142
 143                 break;
 144         }
 145         strcpy(Briefing_text_filename,BIM_BRIEFING_FILE);
 146         strcpy(Ending_text_filename,BIM_ENDING_FILE);
 147
 148         return 1;
 149 }
 150
 151
 152 //
 153 //  Special versions of mission routines for shareware
 154 //
 155
 156 int load_mission_shareware(void)
 157 {
 158     strcpy(Current_mission->mission_name, SHAREWARE_MISSION_NAME);
 159     Current_mission->descent_version = 2;
 160     Current_mission->anarchy_only_flag = 0;
 161
 162     switch (Current_mission->builtin_hogsize) {
 163         case MAC_SHARE_MISSION_HOGSIZE:
 164                 N_secret_levels = 1;
 165
 166                 Last_level = 4;
 167                 Last_secret_level = -1;
 168
 169                 // mac demo is using the regular hog and rl2 files
 170                 strcpy(Level_names[0],"d2leva-1.rl2");
 171                 strcpy(Level_names[1],"d2leva-2.rl2");
 172                 strcpy(Level_names[2],"d2leva-3.rl2");
 173                 strcpy(Level_names[3],"d2leva-4.rl2");
 174                 strcpy(Secret_level_names[0],"d2leva-s.rl2");
 175                 break;
 176         default:
 177                 Int3(); // fall through
 178         case SHAREWARE_MISSION_HOGSIZE:
 179                 N_secret_levels = 0;
 180
 181                 Last_level = 3;
 182                 Last_secret_level = 0;
 183
 184                 strcpy(Level_names[0],"d2leva-1.sl2");
 185                 strcpy(Level_names[1],"d2leva-2.sl2");
 186                 strcpy(Level_names[2],"d2leva-3.sl2");
 187         }
 188
 189         return 1;
 190 }
 191
 192
 193 //
 194 //  Special versions of mission routines for Diamond/S3 version
 195 //
 196
 197 int load_mission_oem(void)
 198 {
 199     strcpy(Current_mission->mission_name, OEM_MISSION_NAME);
 200     Current_mission->descent_version = 2;
 201     Current_mission->anarchy_only_flag = 0;
 202
 203         N_secret_levels = 2;
 204
 205         Last_level = 8;
 206         Last_secret_level = -2;
 207
 208         strcpy(Level_names[0],"d2leva-1.rl2");
 209         strcpy(Level_names[1],"d2leva-2.rl2");
 210         strcpy(Level_names[2],"d2leva-3.rl2");
 211         strcpy(Level_names[3],"d2leva-4.rl2");
 212
 213         strcpy(Secret_level_names[0],"d2leva-s.rl2");
 214
 215         strcpy(Level_names[4],"d2levb-1.rl2");
 216         strcpy(Level_names[5],"d2levb-2.rl2");
 217         strcpy(Level_names[6],"d2levb-3.rl2");
 218         strcpy(Level_names[7],"d2levb-4.rl2");
 219
 220         strcpy(Secret_level_names[1],"d2levb-s.rl2");
 221
 222         Secret_level_table[0] = 1;
 223         Secret_level_table[1] = 5;
 224
 225         return 1;
 226 }
 227
 228
 229 //compare a string for a token. returns true if match
 230 int istok(char *buf,char *tok)
 231 {
 232         return strnicmp(buf,tok,strlen(tok)) == 0;
 233
 234 }
 235
 236 //adds a terminating 0 after a string at the first white space
 237 void add_term(char *s)
 238 {
 239         while (*s && !isspace(*s)) s++;
 240
 241         *s = 0;         //terminate!
 242 }
 243
 244 //returns ptr to string after '=' & white space, or NULL if no '='
 245 //adds 0 after parm at first white space
 246 char *get_value(char *buf)
 247 {
 248         char *t;
 249
 250         t = strchr(buf,'=')+1;
 251
 252         if (t) {
 253                 while (*t && isspace(*t)) t++;
 254
 255                 if (*t)
 256                         return t;
 257         }
 258
 259         return NULL;            //error!
 260 }
 261
 262 //reads a line, returns ptr to value of passed parm.  returns NULL if none
 263 char *get_parm_value(char *parm,CFILE *f)
 264 {
 265         static char buf[80];
 266
 267         if (!cfgets(buf,80,f))
 268                 return NULL;
 269
 270         if (istok(buf,parm))
 271                 return get_value(buf);
 272         else
 273                 return NULL;
 274 }
 275
 276 int ml_sort_func(mle *e0,mle *e1)
 277 {
 278         return stricmp(e0->mission_name,e1->mission_name);
 279
 280 }
 281
 282 extern char CDROM_dir[];
 283
 284 //returns 1 if file read ok, else 0
 285 int read_mission_file(mle *mission, char *filename, int location)
 286 {
 287         char filename2[100];
 288         CFILE *mfile;
 289
 290         //printf("reading: %s\n", filename);
 291
 292         switch (location) {
 293                 case ML_MISSIONDIR:
 294                         strcpy(filename2,MISSION_DIR);
 295                         break;
 296
 297                 case ML_CDROM:
 298                         songs_stop_redbook();           //so we can read from the CD
 299                         strcpy(filename2,CDROM_dir);
 300                         break;
 301
 302                 default:
 303                         Int3();         //fall through
 304
 305                 case ML_CURDIR:
 306                         strcpy(filename2,"");
 307                         break;
 308         }
 309         strcat(filename2,filename);
 310
 311         mfile = cfopen(filename2,"rb");
 312
 313         if (mfile) {
 314                 char *p;
 315                 char temp[PATH_MAX], *ext;
 316
 317                 strcpy(temp,filename);
 318                 p = strrchr(temp, '/'); // get the filename at the end of the path
 319                 if (!p)
 320                         p = temp;
 321                 else p++;
 322
 323                 if ((ext = strchr(p, '.')) == NULL)
 324                         return 0;       //missing extension
 325                 // look if it's .mn2 or .msn
 326                 mission->descent_version = (ext[3] == '2') ? 2 : 1;
 327                 *ext = 0;                       //kill extension
 328
 329                 mission->path = d_strdup(temp);
 330                 mission->anarchy_only_flag = 0;
 331                 mission->filename = mission->path + (p - temp);
 332                 mission->location = location;
 333
 334                 p = get_parm_value("name",mfile);
 335
 336                 if (!p) {               //try enhanced mission
 337                         cfseek(mfile,0,SEEK_SET);
 338                         p = get_parm_value("xname",mfile);
 339                 }
 340
 341                 if (!p) {       //try super-enhanced mission!
 342                         cfseek(mfile,0,SEEK_SET);
 343                         p = get_parm_value("zname",mfile);
 344                 }
 345
 346                 if (p) {
 347                         char *t;
 348                         if ((t=strchr(p,';'))!=NULL)
 349                                 *t=0;
 350                         t = p + strlen(p)-1;
 351                         while (isspace(*t))
 352                                 *t-- = 0; // remove trailing whitespace
 353                         if (strlen(p) > MISSION_NAME_LEN)
 354                                 p[MISSION_NAME_LEN] = 0;
 355                         strncpy(mission->mission_name, p, MISSION_NAME_LEN + 1);
 356                 }
 357                 else {
 358                         cfclose(mfile);
 359                         d_free(mission->path);
 360                         return 0;
 361                 }
 362
 363                 p = get_parm_value("type",mfile);
 364
 365                 //get mission type
 366                 if (p)
 367                         mission->anarchy_only_flag = istok(p,"anarchy");
 368
 369                 cfclose(mfile);
 370
 371                 return 1;
 372         }
 373
 374         return 0;
 375 }
 376
 377 void add_d1_builtin_mission_to_list(mle *mission)
 378 {
 379     int size;
 380
 381         if (!cfexist("descent.hog"))
 382                 return;
 383
 384         size = cfile_size("descent.hog");
 385
 386         switch (size) {
 387         case D1_SHAREWARE_MISSION_HOGSIZE:
 388         case D1_SHAREWARE_10_MISSION_HOGSIZE:
 389         case D1_MAC_SHARE_MISSION_HOGSIZE:
 390                 mission->filename = d_strdup(D1_MISSION_FILENAME);
 391                 strcpy(mission->mission_name, D1_SHAREWARE_MISSION_NAME);
 392                 mission->anarchy_only_flag = 0;
 393                 break;
 394         case D1_OEM_MISSION_HOGSIZE:
 395         case D1_OEM_10_MISSION_HOGSIZE:
 396                 mission->filename = d_strdup(D1_MISSION_FILENAME);
 397                 strcpy(mission->mission_name, D1_OEM_MISSION_NAME);
 398                 mission->anarchy_only_flag = 0;
 399                 break;
 400         default:
 401                 Warning("Unknown D1 hogsize %d\n", size);
 402                 Int3();
 403                 // fall through
 404         case D1_MISSION_HOGSIZE:
 405         case D1_10_MISSION_HOGSIZE:
 406         case D1_MAC_MISSION_HOGSIZE:
 407                 mission->filename = d_strdup(D1_MISSION_FILENAME);
 408                 strcpy(mission->mission_name, D1_MISSION_NAME);
 409                 mission->anarchy_only_flag = 0;
 410                 break;
 411         }
 412
 413         mission->descent_version = 1;
 414         mission->anarchy_only_flag = 0;
 415         mission->builtin_hogsize = 0;
 416         mission->path = mission->filename;
 417         num_missions++;
 418 }
 419
 420
 421 void add_builtin_mission_to_list(mle *mission, char *name)
 422 {
 423     int size = cfile_size("descent2.hog");
 424
 425         if (size == -1)
 426                 size = cfile_size("d2demo.hog");
 427
 428         switch (size) {
 429         case SHAREWARE_MISSION_HOGSIZE:
 430         case MAC_SHARE_MISSION_HOGSIZE:
 431                 mission->filename = d_strdup(SHAREWARE_MISSION_FILENAME);
 432                 strcpy(mission->mission_name,SHAREWARE_MISSION_NAME);
 433                 mission->anarchy_only_flag = 0;
 434                 break;
 435         case OEM_MISSION_HOGSIZE:
 436                 mission->filename = d_strdup(OEM_MISSION_FILENAME);
 437                 strcpy(mission->mission_name,OEM_MISSION_NAME);
 438                 mission->anarchy_only_flag = 0;
 439                 break;
 440         default:
 441                 Warning("Unknown hogsize %d, trying %s\n", size, FULL_MISSION_FILENAME ".mn2");
 442                 Int3(); //fall through
 443         case FULL_MISSION_HOGSIZE:
 444         case FULL_10_MISSION_HOGSIZE:
 445         case MAC_FULL_MISSION_HOGSIZE:
 446                 if (!read_mission_file(mission, FULL_MISSION_FILENAME ".mn2", ML_CURDIR))
 447                         Error("Could not find required mission file <%s>", FULL_MISSION_FILENAME ".mn2");
 448         }
 449
 450         strcpy(name, mission->filename);
 451     mission->builtin_hogsize = size;
 452         mission->descent_version = 2;
 453         mission->anarchy_only_flag = 0;
 454         num_missions++;
 455 }
 456
 457
 458 void add_missions_to_list(mle *mission_list, char *path, char *rel_path, int anarchy_mode)
 459 {
 460         char **find, **i, *ext;
 461
 462         find = PHYSFS_enumerateFiles(path);
 463
 464         for (i = find; *i != NULL; i++)
 465         {
 466                 if (strlen(path) + strlen(*i) + 1 >= PATH_MAX)
 467                         continue;       // path is too long
 468
 469                 strcat(rel_path, *i);
 470                 if (PHYSFS_isDirectory(path))
 471                 {
 472                         strcat(rel_path, "/");
 473                         add_missions_to_list(mission_list, path, rel_path, anarchy_mode);
 474                         *(strrchr(path, '/')) = 0;
 475                 }
 476                 else if ((ext = strrchr(*i, '.')) && (!strnicmp(ext, ".msn", 4) || !strnicmp(ext, ".mn2", 4)))
 477                         if (read_mission_file(&mission_list[num_missions], rel_path, ML_MISSIONDIR))
 478                         {
 479                                 if (anarchy_mode || !mission_list[num_missions].anarchy_only_flag)
 480                                 {
 481                                         mission_list[num_missions].builtin_hogsize = 0;
 482                                         num_missions++;
 483                                 }
 484                                 else
 485                                         d_free(mission_list[num_missions].path);
 486                         }
 487
 488                 if (num_missions >= MAX_MISSIONS)
 489                 {
 490                         mprintf((0, "Warning: more missions than d2x can handle\n"));
 491                         break;
 492                 }
 493
 494                 (strrchr(path, '/'))[1] = 0;    // chop off the entry
 495         }
 496
 497         PHYSFS_freeList(find);
 498 }
 499
 500 /* move <mission_name> to <place> on mission list, increment <place> */
 501 void promote (mle *mission_list, char * mission_name, int * top_place)
 502 {
 503         int i;
 504         char name[FILENAME_LEN], * t;
 505         strcpy(name, mission_name);
 506         if ((t = strchr(name,'.')) != NULL)
 507                 *t = 0; //kill extension
 508         //printf("promoting: %s\n", name);
 509         for (i = *top_place; i < num_missions; i++)
 510                 if (!stricmp(mission_list[i].filename, name)) {
 511                         //swap mission positions
 512                         mle temp;
 513
 514                         temp = mission_list[*top_place];
 515                         mission_list[*top_place] = mission_list[i];
 516                         mission_list[i] = temp;
 517                         ++(*top_place);
 518                         break;
 519                 }
 520 }
 521
 522 void free_mission(void)
 523 {
 524     // May become more complex with the editor
 525     if (Current_mission) {
 526                 d_free(Current_mission->filename);
 527         d_free(Current_mission);
 528     }
 529 }
 530
 531
 532
 533 //fills in the global list of missions.  Returns the number of missions
 534 //in the list.  If anarchy_mode is set, then also add anarchy-only missions.
 535
 536 extern char CDROM_dir[];
 537 #if 0
 538 extern char AltHogDir[];
 539 extern char AltHogdir_initialized;
 540 #endif
 541
 542 mle *build_mission_list(int anarchy_mode)
 543 {
 544         mle *mission_list;
 545         int top_place;
 546     char        builtin_mission_filename[FILENAME_LEN];
 547         char    search_str[PATH_MAX] = MISSION_DIR;
 548
 549         //now search for levels on disk
 550
 551 //@@Took out this code because after this routine was called once for
 552 //@@a list of single-player missions, a subsequent call for a list of
 553 //@@anarchy missions would not scan again, and thus would not find the
 554 //@@anarchy-only missions.  If we retain the minimum level of install,
 555 //@@we may want to put the code back in, having it always scan for all
 556 //@@missions, and have the code that uses it sort out the ones it wants.
 557 //@@    if (num_missions != -1) {
 558 //@@            if (Current_mission_num != 0)
 559 //@@                    load_mission(0);                                //set built-in mission as default
 560 //@@            return num_missions;
 561 //@@    }
 562
 563         MALLOC(mission_list, mle, MAX_MISSIONS);
 564         num_missions = 0;
 565
 566         add_builtin_mission_to_list(mission_list + num_missions, builtin_mission_filename);  //read built-in first
 567         add_d1_builtin_mission_to_list(mission_list + num_missions);
 568         add_missions_to_list(mission_list, search_str, search_str + strlen(search_str), anarchy_mode);
 569
 570         // move original missions (in story-chronological order)
 571         // to top of mission list
 572         top_place = 0;
 573         promote(mission_list, "descent", &top_place); // original descent 1 mission
 574         promote(mission_list, builtin_mission_filename, &top_place); // d2 or d2demo
 575         promote(mission_list, "d2x", &top_place); // vertigo
 576
 577         if (num_missions > top_place)
 578                 qsort(&mission_list[top_place],
 579                       num_missions - top_place,
 580                       sizeof(*mission_list),
 581                                 (int (*)( const void *, const void * ))ml_sort_func);
 582
 583
 584         if (num_missions > top_place)
 585                 qsort(&mission_list[top_place],
 586                       num_missions - top_place,
 587                       sizeof(*mission_list),
 588                       (int (*)( const void *, const void * ))ml_sort_func);
 589
 590         //load_mission(0);   //set built-in mission as default
 591
 592     atexit(free_mission);
 593
 594         return mission_list;
 595 }
 596
 597 void free_mission_list(mle *mission_list)
 598 {
 599         int i;
 600
 601         for (i = 0; i < num_missions; i++)
 602                 d_free(mission_list[i].path);
 603
 604         d_free(mission_list);
 605         num_missions = 0;
 606 }
 607
 608 void init_extra_robot_movie(char *filename);
 609
 610 //values for built-in mission
 611
 612 //loads the specfied mission from the mission list.
 613 //build_mission_list() must have been called.
 614 //Returns true if mission loaded ok, else false.
 615 int load_mission(mle *mission)
 616 {
 617         CFILE *mfile;
 618         char buf[PATH_MAX], *v;
 619     int found_hogfile;
 620
 621     if (Current_mission)
 622         free_mission();
 623     Current_mission = d_malloc(sizeof(Mission));
 624     if (!Current_mission) return 0;
 625     *(mle *) Current_mission = *mission;
 626         Current_mission->filename = d_strdup(mission->filename); // don't want to lose it
 627
 628     // for Descent 1 missions, load descent.hog
 629     if (EMULATING_D1) {
 630         if (!cfile_init("descent.hog"))
 631             Warning("descent.hog not available, this mission may be missing some files required for briefings and exit sequence\n");
 632         if (!stricmp(Current_mission_filename, D1_MISSION_FILENAME))
 633             return load_mission_d1();
 634     }
 635
 636     if (PLAYING_BUILTIN_MISSION) {
 637                 switch (Current_mission->builtin_hogsize) {
 638                 case SHAREWARE_MISSION_HOGSIZE:
 639                 case MAC_SHARE_MISSION_HOGSIZE:
 640                         return load_mission_shareware();
 641                         break;
 642                 case OEM_MISSION_HOGSIZE:
 643                         return load_mission_oem();
 644                         break;
 645                 default:
 646                         Int3(); // fall through
 647                 case FULL_MISSION_HOGSIZE:
 648                 case FULL_10_MISSION_HOGSIZE:
 649                 case MAC_FULL_MISSION_HOGSIZE:
 650                         // continue on... (use d2.mn2 from hogfile)
 651                         break;
 652                 }
 653     }
 654
 655         mprintf(( 0, "Loading mission %s\n", Current_mission_filename ));
 656
 657         //read mission from file
 658
 659         switch (mission->location) {
 660         case ML_MISSIONDIR:
 661                 strcpy(buf,MISSION_DIR);
 662                 break;
 663         case ML_CDROM:
 664                 strcpy(buf,CDROM_dir);
 665                 break;
 666         default:
 667                 Int3();                                                 //fall through
 668         case ML_CURDIR:
 669                 strcpy(buf,"");
 670                 break;
 671         }
 672         strcat(buf, mission->path);
 673         if (mission->descent_version == 2)
 674                 strcat(buf,".mn2");
 675         else
 676                 strcat(buf,".msn");
 677
 678         PHYSFSEXT_locateCorrectCase(buf);
 679
 680         mfile = cfopen(buf,"rb");
 681         if (mfile == NULL) {
 682         free_mission();
 683                 return 0;               //error!
 684         }
 685
 686     //for non-builtin missions, load HOG
 687     if (!PLAYING_BUILTIN_MISSION) {
 688
 689         strcpy(buf+strlen(buf)-4,".hog");               //change extension
 690
 691                 PHYSFSEXT_locateCorrectCase(buf);
 692
 693                 found_hogfile = cfile_init(buf);
 694
 695 #ifdef RELEASE                          //for release, require mission to be in hogfile
 696         if (! found_hogfile) {
 697             cfclose(mfile);
 698             free_mission();
 699             return 0;
 700         }
 701 #endif
 702     }
 703
 704     //init vars
 705         Last_level = 0;
 706         Last_secret_level = 0;
 707         Briefing_text_filename[0] = 0;
 708         Ending_text_filename[0] = 0;
 709
 710         while (cfgets(buf,80,mfile)) {
 711
 712                 if (istok(buf,"name")) {
 713                         Current_mission->enhanced = 0;
 714                         continue;                                               //already have name, go to next line
 715                 }
 716                 if (istok(buf,"xname")) {
 717                         Current_mission->enhanced = 1;
 718                         continue;                                               //already have name, go to next line
 719                 }
 720                 if (istok(buf,"zname")) {
 721                         Current_mission->enhanced = 2;
 722                         continue;                                               //already have name, go to next line
 723                 }
 724                 else if (istok(buf,"type"))
 725                         continue;                                               //already have name, go to next line
 726                 else if (istok(buf,"hog")) {
 727                         char    *bufp = buf;
 728
 729                         while (*(bufp++) != '=')
 730                                 ;
 731
 732                         if (*bufp == ' ')
 733                                 while (*(++bufp) == ' ')
 734                                         ;
 735
 736                         cfile_init(bufp);
 737                         mprintf((0, "Hog file override = [%s]\n", bufp));
 738                 }
 739                 else if (istok(buf,"briefing")) {
 740                         if ((v = get_value(buf)) != NULL) {
 741                                 add_term(v);
 742                                 if (strlen(v) < 13)
 743                                         strcpy(Briefing_text_filename,v);
 744                         }
 745                 }
 746                 else if (istok(buf,"ending")) {
 747                         if ((v = get_value(buf)) != NULL) {
 748                                 add_term(v);
 749                                 if (strlen(v) < 13)
 750                                         strcpy(Ending_text_filename,v);
 751                         }
 752                 }
 753                 else if (istok(buf,"num_levels")) {
 754
 755                         if ((v=get_value(buf))!=NULL) {
 756                                 int n_levels,i;
 757
 758                                 n_levels = atoi(v);
 759
 760                                 for (i=0;i<n_levels && cfgets(buf,80,mfile);i++) {
 761
 762                                         add_term(buf);
 763                                         if (strlen(buf) <= 12) {
 764                                                 strcpy(Level_names[i],buf);
 765                                                 Last_level++;
 766                                         }
 767                                         else
 768                                                 break;
 769                                 }
 770
 771                         }
 772                 }
 773                 else if (istok(buf,"num_secrets")) {
 774                         if ((v=get_value(buf))!=NULL) {
 775                                 int i;
 776
 777                                 N_secret_levels = atoi(v);
 778
 779                                 Assert(N_secret_levels <= MAX_SECRET_LEVELS_PER_MISSION);
 780
 781                                 for (i=0;i<N_secret_levels && cfgets(buf,80,mfile);i++) {
 782                                         char *t;
 783
 784
 785                                         if ((t=strchr(buf,','))!=NULL) *t++=0;
 786                                         else
 787                                                 break;
 788
 789                                         add_term(buf);
 790                                         if (strlen(buf) <= 12) {
 791                                                 strcpy(Secret_level_names[i],buf);
 792                                                 Secret_level_table[i] = atoi(t);
 793                                                 if (Secret_level_table[i]<1 || Secret_level_table[i]>Last_level)
 794                                                         break;
 795                                                 Last_secret_level--;
 796                                         }
 797                                         else
 798                                                 break;
 799                                 }
 800
 801                         }
 802                 }
 803
 804         }
 805
 806         cfclose(mfile);
 807
 808         if (Last_level <= 0) {
 809                 free_mission();         //no valid mission loaded
 810                 return 0;
 811         }
 812
 813         if (Current_mission->enhanced) {
 814                 char t[50];
 815                 extern void bm_read_extra_robots();
 816                 sprintf(t,"%s.ham",Current_mission_filename);
 817                 bm_read_extra_robots(t, Current_mission->enhanced);
 818                 strncpy(t,Current_mission_filename,6);
 819                 init_extra_robot_movie(t);
 820         }
 821
 822         return 1;
 823 }
 824
 825 //loads the named mission if exists.
 826 //Returns true if mission loaded ok, else false.
 827 int load_mission_by_name(char *mission_name)
 828 {
 829         int i;
 830         mle *mission_list = build_mission_list(1);
 831         bool found = 0;
 832
 833         for (i = 0; i < num_missions; i++)
 834                 if (!stricmp(mission_name, mission_list[i].filename))
 835                         found = load_mission(mission_list + i);
 836
 837         free_mission_list(mission_list);
 838         return found;
 839 }
 840
 841 int select_mission(int anarchy_mode, char *message)
 842 {
 843     mle *mission_list = build_mission_list(anarchy_mode);
 844         int new_mission_num;
 845
 846     if (num_missions <= 1) {
 847         new_mission_num = load_mission(mission_list) ? 0 : -1;
 848     } else {
 849         int i, default_mission;
 850         char * m[MAX_MISSIONS];
 851
 852         default_mission = 0;
 853         for (i = 0; i < num_missions; i++) {
 854             m[i] = mission_list[i].mission_name;
 855             if ( !stricmp( m[i], config_last_mission ) )
 856                 default_mission = i;
 857         }
 858
 859         new_mission_num = newmenu_listbox1( message, num_missions, m, 1, default_mission, NULL );
 860
 861         if (new_mission_num >= 0) {
 862                         // Chose a mission
 863                         strcpy(config_last_mission, m[new_mission_num]  );
 864
 865                         if (!load_mission(mission_list + new_mission_num)) {
 866                                 nm_messagebox( NULL, 1, TXT_OK, TXT_MISSION_ERROR);
 867                                 new_mission_num = -1;
 868                         }
 869                 }
 870     }
 871
 872         free_mission_list(mission_list);
 873     return (new_mission_num >= 0);
 874 }