shareware stuff
[btb/d2x.git] / main / mission.c
1 /* $Id: mission.c,v 1.23 2003-10-12 09:38:48 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         switch (Builtin_mission_hogsize) {
255         case MAC_SHARE_MISSION_HOGSIZE:
256                 N_secret_levels = 1;
257
258                 Last_level = 4;
259                 Last_secret_level = -1;
260
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                 strcpy(Level_names[3],"d2leva-4.rl2");
266                 strcpy(Secret_level_names[0],"d2leva-s.rl2");
267                 break;
268         default:
269                 Int3(); // fall through
270         case SHAREWARE_MISSION_HOGSIZE:
271                 N_secret_levels = 0;
272
273                 Last_level = 3;
274                 Last_secret_level = 0;
275
276                 strcpy(Level_names[0],"d2leva-1.sl2");
277                 strcpy(Level_names[1],"d2leva-2.sl2");
278                 strcpy(Level_names[2],"d2leva-3.sl2");
279         }
280
281         return 1;
282 }
283
284
285 //
286 //  Special versions of mission routines for Diamond/S3 version
287 //
288
289 int load_mission_oem(int mission_num)
290 {
291         Current_mission_num = mission_num;
292         Current_mission_filename = Mission_list[mission_num].filename;
293         Current_mission_longname = Mission_list[mission_num].mission_name;
294
295         N_secret_levels = 2;
296
297         Last_level = 8;
298         Last_secret_level = -2;
299
300         strcpy(Level_names[0],"d2leva-1.rl2");
301         strcpy(Level_names[1],"d2leva-2.rl2");
302         strcpy(Level_names[2],"d2leva-3.rl2");
303         strcpy(Level_names[3],"d2leva-4.rl2");
304
305         strcpy(Secret_level_names[0],"d2leva-s.rl2");
306
307         strcpy(Level_names[4],"d2levb-1.rl2");
308         strcpy(Level_names[5],"d2levb-2.rl2");
309         strcpy(Level_names[6],"d2levb-3.rl2");
310         strcpy(Level_names[7],"d2levb-4.rl2");
311
312         strcpy(Secret_level_names[1],"d2levb-s.rl2");
313
314         Secret_level_table[0] = 1;
315         Secret_level_table[1] = 5;
316
317         return 1;
318 }
319
320
321 //strips damn newline from end of line
322 char *mfgets(char *s,int n,CFILE *f)
323 {
324         char *r;
325
326         r = cfgets(s,n,f);
327         if (r && s[strlen(s)-1] == '\n')
328                 s[strlen(s)-1] = 0;
329
330         return r;
331 }
332
333 //compare a string for a token. returns true if match
334 int istok(char *buf,char *tok)
335 {
336         return strnicmp(buf,tok,strlen(tok)) == 0;
337
338 }
339
340 //adds a terminating 0 after a string at the first white space
341 void add_term(char *s)
342 {
343         while (*s && !isspace(*s)) s++;
344
345         *s = 0;         //terminate!
346 }
347
348 //returns ptr to string after '=' & white space, or NULL if no '='
349 //adds 0 after parm at first white space
350 char *get_value(char *buf)
351 {
352         char *t;
353
354         t = strchr(buf,'=')+1;
355
356         if (t) {
357                 while (*t && isspace(*t)) t++;
358
359                 if (*t)
360                         return t;
361         }
362
363         return NULL;            //error!
364 }
365
366 //reads a line, returns ptr to value of passed parm.  returns NULL if none
367 char *get_parm_value(char *parm,CFILE *f)
368 {
369         static char buf[80];
370
371         if (!mfgets(buf,80,f))
372                 return NULL;
373
374         if (istok(buf,parm))
375                 return get_value(buf);
376         else
377                 return NULL;
378 }
379
380 int ml_sort_func(mle *e0,mle *e1)
381 {
382         return stricmp(e0->mission_name,e1->mission_name);
383
384 }
385
386 extern char CDROM_dir[];
387
388 //returns 1 if file read ok, else 0
389 int read_mission_file(char *filename,int count,int location)
390 {
391         char filename2[100];
392         CFILE *mfile;
393
394         //printf("reading: %s\n", filename);
395
396         switch (location) {
397                 case ML_MISSIONDIR:
398                         strcpy(filename2,MISSION_DIR);
399                         break;
400
401                 case ML_CDROM:
402                         songs_stop_redbook();           //so we can read from the CD
403                         strcpy(filename2,CDROM_dir);
404                         break;
405
406                 default:
407                         Int3();         //fall through
408
409                 case ML_CURDIR:
410                         strcpy(filename2,"");
411                         break;
412         }
413         strcat(filename2,filename);
414
415         mfile = cfopen(filename2,"rb");
416
417         if (mfile) {
418                 char *p;
419                 char temp[FILENAME_LEN],*t;
420
421                 strcpy(temp,filename);
422                 if ((t = strchr(temp,'.')) == NULL)
423                         return 0;       //missing extension
424                 // look if it's .mn2 or .msn
425                 Mission_list[count].descent_version = (t[3] == '2') ? 2 : 1;
426                 *t = 0;                 //kill extension
427
428                 strncpy( Mission_list[count].filename, temp, 9 );
429                 Mission_list[count].anarchy_only_flag = 0;
430                 Mission_list[count].location = location;
431
432                 p = get_parm_value("name",mfile);
433
434                 if (!p) {               //try enhanced mission
435                         cfseek(mfile,0,SEEK_SET);
436                         p = get_parm_value("xname",mfile);
437                 }
438
439                 if (!p) {       //try super-enhanced mission!
440                         cfseek(mfile,0,SEEK_SET);
441                         p = get_parm_value("zname",mfile);
442                 }
443
444                 if (p) {
445                         char *t;
446                         if ((t=strchr(p,';'))!=NULL)
447                                 *t=0;
448                         t = p + strlen(p)-1;
449                         while (isspace(*t)) t--;
450                         strncpy(Mission_list[count].mission_name,p,MISSION_NAME_LEN);
451                 }
452                 else {
453                         cfclose(mfile);
454                         return 0;
455                 }
456
457                 p = get_parm_value("type",mfile);
458
459                 //get mission type
460                 if (p)
461                         Mission_list[count].anarchy_only_flag = istok(p,"anarchy");
462
463                 cfclose(mfile);
464
465                 return 1;
466         }
467
468         return 0;
469 }
470
471 void add_d1_builtin_mission_to_list(int *count)
472 {
473         if (!cfexist("descent.hog"))
474                 return;
475
476         D1_Builtin_mission_hogsize = cfile_size("descent.hog");
477
478         switch (D1_Builtin_mission_hogsize) {
479         case D1_SHAREWARE_MISSION_HOGSIZE:
480         case D1_SHAREWARE_10_MISSION_HOGSIZE:
481         case D1_MAC_SHARE_MISSION_HOGSIZE:
482                 strcpy(Mission_list[*count].filename, D1_MISSION_FILENAME);
483                 strcpy(Mission_list[*count].mission_name, D1_SHAREWARE_MISSION_NAME);
484                 Mission_list[*count].anarchy_only_flag = 0;
485                 break;
486         case D1_OEM_MISSION_HOGSIZE:
487                 strcpy(Mission_list[*count].filename, D1_MISSION_FILENAME);
488                 strcpy(Mission_list[*count].mission_name, D1_OEM_MISSION_NAME);
489                 Mission_list[*count].anarchy_only_flag = 0;
490                 break;
491         default:
492                 Warning("Unknown D1 hogsize %d\n", D1_Builtin_mission_hogsize);
493                 Int3();
494                 // fall through
495         case D1_MISSION_HOGSIZE:
496         case D1_10_MISSION_HOGSIZE:
497         case D1_MAC_MISSION_HOGSIZE:
498                 strcpy(Mission_list[*count].filename, D1_MISSION_FILENAME);
499                 strcpy(Mission_list[*count].mission_name, D1_MISSION_NAME);
500                 Mission_list[*count].anarchy_only_flag = 0;
501                 break;
502         }
503
504         strcpy(D1_Builtin_mission_filename, Mission_list[*count].filename);
505         Mission_list[*count].descent_version = 1;
506         Mission_list[*count].anarchy_only_flag = 0;
507         ++(*count);
508 }
509
510
511 void add_builtin_mission_to_list(int *count)
512 {
513         Builtin_mission_hogsize = cfile_size("descent2.hog");
514         if (Builtin_mission_hogsize == -1)
515                 Builtin_mission_hogsize = cfile_size("d2demo.hog");
516
517         switch (Builtin_mission_hogsize) {
518         case SHAREWARE_MISSION_HOGSIZE:
519         case MAC_SHARE_MISSION_HOGSIZE:
520                 strcpy(Mission_list[*count].filename,SHAREWARE_MISSION_FILENAME);
521                 strcpy(Mission_list[*count].mission_name,SHAREWARE_MISSION_NAME);
522                 Mission_list[*count].anarchy_only_flag = 0;
523                 break;
524         case OEM_MISSION_HOGSIZE:
525                 strcpy(Mission_list[*count].filename,OEM_MISSION_FILENAME);
526                 strcpy(Mission_list[*count].mission_name,OEM_MISSION_NAME);
527                 Mission_list[*count].anarchy_only_flag = 0;
528                 break;
529         default:
530                 Warning("Unknown hogsize %d, trying %s\n", Builtin_mission_hogsize, FULL_MISSION_FILENAME ".mn2");
531                 Int3(); //fall through
532         case FULL_MISSION_HOGSIZE:
533         case MAC_FULL_MISSION_HOGSIZE:
534                 if (!read_mission_file(FULL_MISSION_FILENAME ".mn2", 0, ML_CURDIR))
535                         Error("Could not find required mission file <%s>", FULL_MISSION_FILENAME ".mn2");
536         }
537
538         strcpy(Builtin_mission_filename, Mission_list[*count].filename);
539         Mission_list[*count].descent_version = 2;
540         Mission_list[*count].anarchy_only_flag = 0;
541         ++(*count);
542 }
543
544
545 void add_missions_to_list(char *search_name, int *count, int anarchy_mode)
546 {
547         FILEFINDSTRUCT find;
548         if( !FileFindFirst( search_name, &find ) ) {
549                 do      {
550                         if (read_mission_file( find.name, *count, ML_MISSIONDIR )) {
551
552                                 if (anarchy_mode || !Mission_list[*count].anarchy_only_flag)
553                                         ++(*count);
554                         }
555
556                 } while( !FileFindNext( &find ) && *count < MAX_MISSIONS);
557                 FileFindClose();
558                 if (*count >= MAX_MISSIONS)
559                         mprintf((0, "Warning: more missions than d2x can handle\n"));
560         }
561 }
562
563 /* move <mission_name> to <place> on mission list, increment <place> */
564 void promote (char * mission_name, int * top_place, int num_missions)
565 {
566         int i;
567         char name[FILENAME_LEN], * t;
568         strcpy(name, mission_name);
569         if ((t = strchr(name,'.')) != NULL)
570                 *t = 0; //kill extension
571         //printf("promoting: %s\n", name);
572         for (i = *top_place; i < num_missions; i++)
573                 if (!stricmp(Mission_list[i].filename, name)) {
574                         //swap mission positions
575                         mle temp;
576
577                         temp = Mission_list[*top_place];
578                         Mission_list[*top_place] = Mission_list[i];
579                         Mission_list[i] = temp;
580                         ++(*top_place);
581                         break;
582                 }
583 }
584
585
586
587 //fills in the global list of missions.  Returns the number of missions
588 //in the list.  If anarchy_mode set, don't include non-anarchy levels.
589
590 extern char CDROM_dir[];
591 extern char AltHogDir[];
592 extern char AltHogdir_initialized;
593
594 int build_mission_list(int anarchy_mode)
595 {
596         static int num_missions=-1;
597         int count = 0;
598         int top_place;
599
600         //now search for levels on disk
601
602 //@@Took out this code because after this routine was called once for
603 //@@a list of single-player missions, a subsequent call for a list of
604 //@@anarchy missions would not scan again, and thus would not find the
605 //@@anarchy-only missions.  If we retain the minimum level of install,
606 //@@we may want to put the code back in, having it always scan for all
607 //@@missions, and have the code that uses it sort out the ones it wants.
608 //@@    if (num_missions != -1) {
609 //@@            if (Current_mission_num != 0)
610 //@@                    load_mission(0);                                //set built-in mission as default
611 //@@            return num_missions;
612 //@@    }
613
614         add_builtin_mission_to_list(&count);  //read built-in first
615         add_d1_builtin_mission_to_list(&count);
616         add_missions_to_list(MISSION_DIR "*.mn2", &count, anarchy_mode);
617         add_missions_to_list(MISSION_DIR "*.msn", &count, anarchy_mode);
618
619         if (AltHogdir_initialized) {
620                 char search_name[PATH_MAX + 5];
621                 strcpy(search_name, AltHogDir);
622                 strcat(search_name, "/" MISSION_DIR "*.mn2");
623                 add_missions_to_list(search_name, &count, anarchy_mode);
624                 strcpy(search_name, AltHogDir);
625                 strcat(search_name, "/" MISSION_DIR "*.msn");
626                 add_missions_to_list(search_name, &count, anarchy_mode);
627         }
628
629         // move original missions (in story-chronological order)
630         // to top of mission list
631         top_place = 0;
632         promote("descent", &top_place, count); // original descent 1 mission
633         D1_Builtin_mission_num = top_place - 1;
634         promote(Builtin_mission_filename, &top_place, count); // d2 or d2demo
635         Builtin_mission_num = top_place - 1;
636         promote("d2x", &top_place, count); // vertigo
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
645         if (count > top_place)
646                 qsort(&Mission_list[top_place],
647                       count - top_place,
648                       sizeof(*Mission_list),
649                       (int (*)( const void *, const void * ))ml_sort_func);
650
651         //load_mission(0);   //set built-in mission as default
652
653         num_missions = count;
654
655         return count;
656 }
657
658 void init_extra_robot_movie(char *filename);
659
660 //values for built-in mission
661
662 //loads the specfied mission from the mission list.
663 //build_mission_list() must have been called.
664 //Returns true if mission loaded ok, else false.
665 int load_mission(int mission_num)
666 {
667         CFILE *mfile;
668         char buf[80], *v;
669         int found_hogfile;
670         int enhanced_mission = 0;
671
672         if (mission_num == D1_Builtin_mission_num) {
673                 cfile_use_descent1_hogfile("descent.hog");
674                 switch (D1_Builtin_mission_hogsize) {
675                 default:
676                         Int3(); // fall through
677                 case D1_MISSION_HOGSIZE:
678                 case D1_10_MISSION_HOGSIZE:
679                 case D1_MAC_MISSION_HOGSIZE:
680                 case D1_OEM_MISSION_HOGSIZE:
681                 case D1_SHAREWARE_MISSION_HOGSIZE:
682                 case D1_SHAREWARE_10_MISSION_HOGSIZE:
683                 case D1_MAC_SHARE_MISSION_HOGSIZE:
684                         return load_mission_d1(mission_num);
685                         break;
686                 }
687         }
688
689         if (mission_num == Builtin_mission_num) {
690                 switch (Builtin_mission_hogsize) {
691                 case SHAREWARE_MISSION_HOGSIZE:
692                 case MAC_SHARE_MISSION_HOGSIZE:
693                         return load_mission_shareware(mission_num);
694                         break;
695                 case OEM_MISSION_HOGSIZE:
696                         return load_mission_oem(mission_num);
697                         break;
698                 default:
699                         Int3(); // fall through
700                 case FULL_MISSION_HOGSIZE:
701                 case MAC_FULL_MISSION_HOGSIZE:
702                         // continue on... (use d2.mn2 from hogfile)
703                         break;
704                 }
705         }
706
707         Current_mission_num = mission_num;
708
709         mprintf(( 0, "Loading mission %d\n", mission_num ));
710
711         //read mission from file
712
713         switch (Mission_list[mission_num].location) {
714         case ML_MISSIONDIR:
715                 strcpy(buf,MISSION_DIR);
716                 break;
717         case ML_CDROM:
718                 strcpy(buf,CDROM_dir);
719                 break;
720         default:
721                 Int3();                                                 //fall through
722         case ML_CURDIR:
723                 strcpy(buf,"");
724                 break;
725         }
726         strcat(buf,Mission_list[mission_num].filename);
727         if (Mission_list[mission_num].descent_version == 2)
728                 strcat(buf,".mn2");
729         else
730                 strcat(buf,".msn");
731
732         mfile = cfopen(buf,"rb");
733         if (mfile == NULL) {
734                 Current_mission_num = -1;
735                 return 0;               //error!
736         }
737
738         //for non-builtin missions, load HOG
739         if (strcmp(Mission_list[mission_num].filename, Builtin_mission_filename)) {
740
741                 strcpy(buf+strlen(buf)-4,".hog");               //change extension
742
743                 found_hogfile = cfile_use_alternate_hogfile(buf);
744
745                 #ifdef RELEASE                          //for release, require mission to be in hogfile
746                 if (! found_hogfile) {
747                         cfclose(mfile);
748                         Current_mission_num = -1;
749                         return 0;
750                 }
751                 #endif
752
753                 // for Descent 1 missions, load descent.hog
754                 if (Mission_list[mission_num].descent_version == 1 && strcmp(buf, "descent.hog"))
755                         if (!cfile_use_descent1_hogfile("descent.hog"))
756                                 Warning("descent.hog not available, this mission may be missing some files required for briefings and exit sequence\n");
757         }
758
759         //init vars
760         Last_level = 0;
761         Last_secret_level = 0;
762         Briefing_text_filename[0] = 0;
763         Ending_text_filename[0] = 0;
764
765         while (mfgets(buf,80,mfile)) {
766
767                 if (istok(buf,"name"))
768                         continue;                                               //already have name, go to next line
769                 if (istok(buf,"xname")) {
770                         enhanced_mission = 1;
771                         continue;                                               //already have name, go to next line
772                 }
773                 if (istok(buf,"zname")) {
774                         enhanced_mission = 2;
775                         continue;                                               //already have name, go to next line
776                 }
777                 else if (istok(buf,"type"))
778                         continue;                                               //already have name, go to next line
779                 else if (istok(buf,"hog")) {
780                         char    *bufp = buf;
781
782                         while (*(bufp++) != '=')
783                                 ;
784
785                         if (*bufp == ' ')
786                                 while (*(++bufp) == ' ')
787                                         ;
788
789                         cfile_use_alternate_hogfile(bufp);
790                         mprintf((0, "Hog file override = [%s]\n", bufp));
791                 }
792                 else if (istok(buf,"briefing")) {
793                         if ((v = get_value(buf)) != NULL) {
794                                 add_term(v);
795                                 if (strlen(v) < 13)
796                                         strcpy(Briefing_text_filename,v);
797                         }
798                 }
799                 else if (istok(buf,"ending")) {
800                         if ((v = get_value(buf)) != NULL) {
801                                 add_term(v);
802                                 if (strlen(v) < 13)
803                                         strcpy(Ending_text_filename,v);
804                         }
805                 }
806                 else if (istok(buf,"num_levels")) {
807
808                         if ((v=get_value(buf))!=NULL) {
809                                 int n_levels,i;
810
811                                 n_levels = atoi(v);
812
813                                 for (i=0;i<n_levels && mfgets(buf,80,mfile);i++) {
814
815                                         add_term(buf);
816                                         if (strlen(buf) <= 12) {
817                                                 strcpy(Level_names[i],buf);
818                                                 Last_level++;
819                                         }
820                                         else
821                                                 break;
822                                 }
823
824                         }
825                 }
826                 else if (istok(buf,"num_secrets")) {
827                         if ((v=get_value(buf))!=NULL) {
828                                 int i;
829
830                                 N_secret_levels = atoi(v);
831
832                                 Assert(N_secret_levels <= MAX_SECRET_LEVELS_PER_MISSION);
833
834                                 for (i=0;i<N_secret_levels && mfgets(buf,80,mfile);i++) {
835                                         char *t;
836
837                                         
838                                         if ((t=strchr(buf,','))!=NULL) *t++=0;
839                                         else
840                                                 break;
841
842                                         add_term(buf);
843                                         if (strlen(buf) <= 12) {
844                                                 strcpy(Secret_level_names[i],buf);
845                                                 Secret_level_table[i] = atoi(t);
846                                                 if (Secret_level_table[i]<1 || Secret_level_table[i]>Last_level)
847                                                         break;
848                                                 Last_secret_level--;
849                                         }
850                                         else
851                                                 break;
852                                 }
853
854                         }
855                 }
856
857         }
858
859         cfclose(mfile);
860
861         if (Last_level <= 0) {
862                 Current_mission_num = -1;               //no valid mission loaded
863                 return 0;
864         }
865
866         Current_mission_filename = Mission_list[Current_mission_num].filename;
867         Current_mission_longname = Mission_list[Current_mission_num].mission_name;
868
869         if (enhanced_mission) {
870                 char t[50];
871                 extern void bm_read_extra_robots();
872                 sprintf(t,"%s.ham",Current_mission_filename);
873                 bm_read_extra_robots(t,enhanced_mission);
874                 strncpy(t,Current_mission_filename,6);
875                 strcat(t,"-l.mvl");
876                 init_extra_robot_movie(t);
877         }
878
879         return 1;
880 }
881
882 //loads the named mission if exists.
883 //Returns true if mission loaded ok, else false.
884 int load_mission_by_name(char *mission_name)
885 {
886         int n,i;
887
888         n = build_mission_list(1);
889
890         for (i=0;i<n;i++)
891                 if (!stricmp(mission_name,Mission_list[i].filename))
892                         return load_mission(i);
893
894         return 0;               //couldn't find mission
895 }