don't need .msn file for descent.hog anymore
[btb/d2x.git] / main / mission.c
1 /* $Id: mission.c,v 1.17 2003-01-07 03:10:20 btb Exp $ */
2 /*
3 THE COMPUTER CODE CONTAINED HEREIN IS THE SOLE PROPERTY OF PARALLAX
4 SOFTWARE CORPORATION ("PARALLAX").  PARALLAX, IN DISTRIBUTING THE CODE TO
5 END-USERS, AND SUBJECT TO ALL OF THE TERMS AND CONDITIONS HEREIN, GRANTS A
6 ROYALTY-FREE, PERPETUAL LICENSE TO SUCH END-USERS FOR USE BY SUCH END-USERS
7 IN USING, DISPLAYING,  AND CREATING DERIVATIVE WORKS THEREOF, SO LONG AS
8 SUCH USE, DISPLAY OR CREATION IS FOR NON-COMMERCIAL, ROYALTY OR REVENUE
9 FREE PURPOSES.  IN NO EVENT SHALL THE END-USER USE THE COMPUTER CODE
10 CONTAINED HEREIN FOR REVENUE-BEARING PURPOSES.  THE END-USER UNDERSTANDS
11 AND AGREES TO THE TERMS HEREIN AND ACCEPTS THE SAME BY USE OF THIS FILE.
12 COPYRIGHT 1993-1999 PARALLAX SOFTWARE CORPORATION.  ALL RIGHTS RESERVED.
13 */
14
15 /*
16  *
17  * Code to handle multiple missions
18  *
19  * Old Log:
20  * Revision 1.4  1995/10/31  10:21:40  allender
21  * no mission support in shareware
22  *
23  * Revision 1.3  1995/10/21  22:53:04  allender
24  * moved missions to data folder
25  *
26  * Revision 1.2  1995/09/13  08:47:29  allender
27  * made to work with Chris' direct stuff
28  *
29  * Revision 1.1  1995/05/16  15:27:48  allender
30  * Initial revision
31  *
32  * Revision 2.9  1995/05/26  16:16:32  john
33  * Split SATURN into define's for requiring cd, using cd, etc.
34  * Also started adding all the Rockwell stuff.
35  *
36  * Revision 2.8  1995/03/20  15:49:31  mike
37  * Remove eof char from comment which confused make depend, causing
38  * no mission.obj: line in makefile.  Pretty stupid tool, huh?
39  *
40  * Revision 2.7  1995/03/20  12:12:11  john
41  * Added ifdef SATURN.
42  *
43  * Revision 2.6  1995/03/15  14:32:49  john
44  * Added code to force the Descent CD-rom in the drive.
45  *
46  * Revision 2.5  1995/03/15  11:41:15  john
47  * Better Saturn CD-ROM support.
48  *
49  * Revision 2.4  1995/03/14  18:24:14  john
50  * Force Destination Saturn to use CD-ROM drive.
51  *
52  * Revision 2.3  1995/03/07  14:19:41  mike
53  * More destination saturn stuff.
54  *
55  * Revision 2.2  1995/03/06  23:09:03  mike
56  * more saturn stuff: make briefings work for saturn mission.
57  *
58  * Revision 2.1  1995/03/06  16:47:48  mike
59  * destination saturn
60  *
61  * Revision 2.0  1995/02/27  11:27:49  john
62  * New version 2.0, which has no anonymous unions, builds with
63  * Watcom 10.0, and doesn't require parsing BITMAPS.TBL.
64  *
65  * Revision 1.14  1995/02/15  11:30:37  john
66  * Fixed bug with potential mem overwrite on line 160.
67  *
68  * Revision 1.13  1995/02/10  17:53:20  matt
69  * Changed mission name again
70  *
71  * Revision 1.12  1995/02/10  17:35:38  matt
72  * Changed name of built-in mission
73  *
74  * Revision 1.11  1995/02/07  17:13:51  allender
75  * removed return statement in load_mission so that built in mission will
76  * actually set the Current_mission_name and _filename
77  *
78  * Revision 1.10  1995/01/31  01:19:45  matt
79  * Made build_mission_list() sort missions by name
80  *
81  * Revision 1.9  1995/01/30  13:49:58  allender
82  * changed build_mission_list in load_mission_by_name to include
83  * anarchy levels.
84  *
85  * Revision 1.8  1995/01/30  13:03:51  matt
86  * Fixed dumb mistake
87  *
88  * Revision 1.7  1995/01/30  12:55:22  matt
89  * Added vars to point to mission names
90  *
91  * Revision 1.6  1995/01/22  18:57:28  matt
92  * Made player highest level work with missions
93  *
94  * Revision 1.5  1995/01/22  14:13:08  matt
95  * Added flag in mission list for anarchy-only missions
96  *
97  * Revision 1.4  1995/01/21  23:13:12  matt
98  * Made high scores with (not work, really) with loaded missions
99  * Don't give player high score when quit game
100  *
101  * Revision 1.3  1995/01/21  16:27:12  matt
102  * Made endlevel briefing work with missions
103  *
104  * Revision 1.2  1995/01/20  22:47:50  matt
105  * Mission system implemented, though imcompletely
106  *
107  * Revision 1.1  1995/01/20  13:42:19  matt
108  * Initial revision
109  *
110  *
111  */
112
113 #ifdef HAVE_CONFIG_H
114 #include <conf.h>
115 #endif
116
117 #include <stdio.h>
118 #include <stdlib.h>
119 #include <string.h>
120 #include <ctype.h>
121 #include <limits.h>
122
123 #include "pstypes.h"
124 #include "cfile.h"
125
126 #include "strutil.h"
127 #include "inferno.h"
128 #include "mission.h"
129 #include "gameseq.h"
130 #include "titles.h"
131 #include "songs.h"
132 #include "mono.h"
133 #include "error.h"
134 #include "findfile.h"
135 #include "hoard.h"
136
137 mle Mission_list[MAX_MISSIONS];
138
139 int Current_mission_num;
140 int N_secret_levels;    // Made a global by MK for scoring purposes.  August 1, 1995.
141 char *Current_mission_filename,*Current_mission_longname;
142
143 int Builtin_mission_num;
144 char Builtin_mission_filename[9];
145 int Builtin_mission_hogsize;
146
147 int D1_Builtin_mission_num;
148 char D1_Builtin_mission_filename[9];
149 int D1_Builtin_mission_hogsize;
150
151 //this stuff should get defined elsewhere
152
153 char Level_names[MAX_LEVELS_PER_MISSION][FILENAME_LEN];
154 char Secret_level_names[MAX_SECRET_LEVELS_PER_MISSION][FILENAME_LEN];
155
156 //where the missions go
157 #ifndef EDITOR
158 #define MISSION_DIR "missions/"
159 #else
160 #define MISSION_DIR "./"
161 #endif
162
163 //values for d1 built-in mission
164 #define BIM_LAST_LEVEL          27
165 #define BIM_LAST_SECRET_LEVEL   -3
166 #define BIM_BRIEFING_FILE       "briefing.tex"
167 #define BIM_ENDING_FILE         "endreg.tex"
168
169 //
170 //  Special versions of mission routines for d1 builtins
171 //
172
173 int load_mission_d1(int mission_num)
174 {
175         int i;
176
177         cfile_use_descent1_hogfile("descent.hog");
178
179         Current_mission_num = mission_num;
180         Current_mission_filename = Mission_list[mission_num].filename;
181         Current_mission_longname = Mission_list[mission_num].mission_name;
182
183         switch (D1_Builtin_mission_hogsize) {
184         case D1_SHAREWARE_MISSION_HOGSIZE:
185                 N_secret_levels = 0;
186
187                 Last_level = 7;
188                 Last_secret_level = 0;
189
190                 //build level names
191                 for (i=0;i<Last_level;i++)
192                         sprintf(Level_names[i], "level%02d.sdl", i+1);
193
194                 break;
195         default:
196                 Int3(); // fall through
197         case D1_MISSION_HOGSIZE:
198                 N_secret_levels = 3;
199
200                 Last_level = BIM_LAST_LEVEL;
201                 Last_secret_level = BIM_LAST_SECRET_LEVEL;
202
203                 //build level names
204                 for (i=0;i<Last_level;i++)
205                         sprintf(Level_names[i], "level%02d.rdl", i+1);
206                 for (i=0;i<-Last_secret_level;i++)
207                         sprintf(Secret_level_names[i], "levels%1d.rdl", i+1);
208
209                 Secret_level_table[0] = 10;
210                 Secret_level_table[1] = 21;
211                 Secret_level_table[2] = 24;
212
213                 break;
214         }
215         strcpy(Briefing_text_filename,BIM_BRIEFING_FILE);
216         strcpy(Ending_text_filename,BIM_ENDING_FILE);
217
218         return 1;
219 }
220
221
222 //
223 //  Special versions of mission routines for shareware
224 //
225
226 int load_mission_shareware(int mission_num)
227 {
228         Current_mission_num = mission_num;
229         Current_mission_filename = Mission_list[mission_num].filename;
230         Current_mission_longname = Mission_list[mission_num].mission_name;
231
232         N_secret_levels = 0;
233
234         Last_level = 3;
235         Last_secret_level = 0;
236
237         switch (Builtin_mission_hogsize) {
238         case MAC_SHARE_MISSION_HOGSIZE:
239                 // mac demo is using the regular hog and rl2 files
240                 strcpy(Level_names[0],"d2leva-1.rl2");
241                 strcpy(Level_names[1],"d2leva-2.rl2");
242                 strcpy(Level_names[2],"d2leva-3.rl2");
243                 break;
244         default:
245                 Int3(); // fall through
246         case SHAREWARE_MISSION_HOGSIZE:
247                 strcpy(Level_names[0],"d2leva-1.sl2");
248                 strcpy(Level_names[1],"d2leva-2.sl2");
249                 strcpy(Level_names[2],"d2leva-3.sl2");
250         }
251
252         return 1;
253 }
254
255
256 //
257 //  Special versions of mission routines for Diamond/S3 version
258 //
259
260 int load_mission_oem(int mission_num)
261 {
262         Current_mission_num = mission_num;
263         Current_mission_filename = Mission_list[mission_num].filename;
264         Current_mission_longname = Mission_list[mission_num].mission_name;
265
266         N_secret_levels = 2;
267
268         Last_level = 8;
269         Last_secret_level = -2;
270
271         strcpy(Level_names[0],"d2leva-1.rl2");
272         strcpy(Level_names[1],"d2leva-2.rl2");
273         strcpy(Level_names[2],"d2leva-3.rl2");
274         strcpy(Level_names[3],"d2leva-4.rl2");
275
276         strcpy(Secret_level_names[0],"d2leva-s.rl2");
277
278         strcpy(Level_names[4],"d2levb-1.rl2");
279         strcpy(Level_names[5],"d2levb-2.rl2");
280         strcpy(Level_names[6],"d2levb-3.rl2");
281         strcpy(Level_names[7],"d2levb-4.rl2");
282
283         strcpy(Secret_level_names[1],"d2levb-s.rl2");
284
285         Secret_level_table[0] = 1;
286         Secret_level_table[1] = 5;
287
288         return 1;
289 }
290
291
292 //strips damn newline from end of line
293 char *mfgets(char *s,int n,CFILE *f)
294 {
295         char *r;
296
297         r = cfgets(s,n,f);
298         if (r && s[strlen(s)-1] == '\n')
299                 s[strlen(s)-1] = 0;
300
301         return r;
302 }
303
304 //compare a string for a token. returns true if match
305 int istok(char *buf,char *tok)
306 {
307         return strnicmp(buf,tok,strlen(tok)) == 0;
308
309 }
310
311 //adds a terminating 0 after a string at the first white space
312 void add_term(char *s)
313 {
314         while (*s && !isspace(*s)) s++;
315
316         *s = 0;         //terminate!
317 }
318
319 //returns ptr to string after '=' & white space, or NULL if no '='
320 //adds 0 after parm at first white space
321 char *get_value(char *buf)
322 {
323         char *t;
324
325         t = strchr(buf,'=')+1;
326
327         if (t) {
328                 while (*t && isspace(*t)) t++;
329
330                 if (*t)
331                         return t;
332         }
333
334         return NULL;            //error!
335 }
336
337 //reads a line, returns ptr to value of passed parm.  returns NULL if none
338 char *get_parm_value(char *parm,CFILE *f)
339 {
340         static char buf[80];
341
342         if (!mfgets(buf,80,f))
343                 return NULL;
344
345         if (istok(buf,parm))
346                 return get_value(buf);
347         else
348                 return NULL;
349 }
350
351 int ml_sort_func(mle *e0,mle *e1)
352 {
353         return stricmp(e0->mission_name,e1->mission_name);
354
355 }
356
357 extern char CDROM_dir[];
358
359 //returns 1 if file read ok, else 0
360 int read_mission_file(char *filename,int count,int location)
361 {
362         char filename2[100];
363         CFILE *mfile;
364
365         //printf("reading: %s\n", filename);
366
367         switch (location) {
368                 case ML_MISSIONDIR:
369                         strcpy(filename2,MISSION_DIR);
370                         break;
371
372                 case ML_CDROM:
373                         songs_stop_redbook();           //so we can read from the CD
374                         strcpy(filename2,CDROM_dir);
375                         break;
376
377                 default:
378                         Int3();         //fall through
379
380                 case ML_CURDIR:
381                         strcpy(filename2,"");
382                         break;
383         }
384         strcat(filename2,filename);
385
386         mfile = cfopen(filename2,"rb");
387
388         if (mfile) {
389                 char *p;
390                 char temp[FILENAME_LEN],*t;
391
392                 strcpy(temp,filename);
393                 if ((t = strchr(temp,'.')) == NULL)
394                         return 0;       //missing extension
395                 // look if it's .mn2 or .msn
396                 Mission_list[count].descent_version = (t[3] == '2') ? 2 : 1;
397                 *t = 0;                 //kill extension
398
399                 strncpy( Mission_list[count].filename, temp, 9 );
400                 Mission_list[count].anarchy_only_flag = 0;
401                 Mission_list[count].location = location;
402
403                 p = get_parm_value("name",mfile);
404
405                 if (!p) {               //try enhanced mission
406                         cfseek(mfile,0,SEEK_SET);
407                         p = get_parm_value("xname",mfile);
408                 }
409
410                 if (HoardEquipped())
411                 {
412                         if (!p) {               //try super-enhanced mission!
413                                 cfseek(mfile,0,SEEK_SET);
414                                 p = get_parm_value("zname",mfile);
415                         }
416                 }
417
418                 if (p) {
419                         char *t;
420                         if ((t=strchr(p,';'))!=NULL)
421                                 *t=0;
422                         t = p + strlen(p)-1;
423                         while (isspace(*t)) t--;
424                         strncpy(Mission_list[count].mission_name,p,MISSION_NAME_LEN);
425                 }
426                 else {
427                         cfclose(mfile);
428                         return 0;
429                 }
430
431                 p = get_parm_value("type",mfile);
432
433                 //get mission type
434                 if (p)
435                         Mission_list[count].anarchy_only_flag = istok(p,"anarchy");
436
437                 cfclose(mfile);
438
439                 return 1;
440         }
441
442         return 0;
443 }
444
445 void add_d1_builtin_mission_to_list(int *count)
446 {
447         if (!cfexist("descent.hog"))
448                 return;
449
450         D1_Builtin_mission_hogsize = cfile_size("descent.hog");
451
452         switch (D1_Builtin_mission_hogsize) {
453         default:
454                 Warning("Unknown D1 hogsize %d\n", D1_Builtin_mission_hogsize);
455                 Int3();
456                 // fall through
457         case D1_SHAREWARE_MISSION_HOGSIZE:
458                 strcpy(Mission_list[*count].filename, D1_MISSION_FILENAME);
459                 strcpy(Mission_list[*count].mission_name, D1_SHAREWARE_MISSION_NAME);
460                 Mission_list[*count].anarchy_only_flag = 0;
461                 break;
462         case D1_MISSION_HOGSIZE:
463                 strcpy(Mission_list[*count].filename, D1_MISSION_FILENAME);
464                 strcpy(Mission_list[*count].mission_name, D1_MISSION_NAME);
465                 Mission_list[*count].anarchy_only_flag = 0;
466                 break;
467         }
468
469         strcpy(D1_Builtin_mission_filename, Mission_list[*count].filename);
470         Mission_list[*count].descent_version = 1;
471         Mission_list[*count].anarchy_only_flag = 0;
472         ++(*count);
473 }
474
475
476 void add_builtin_mission_to_list(int *count)
477 {
478         Builtin_mission_hogsize = cfile_size("descent2.hog");
479         if (Builtin_mission_hogsize == -1)
480                 Builtin_mission_hogsize = cfile_size("d2demo.hog");
481
482         switch (Builtin_mission_hogsize) {
483         case SHAREWARE_MISSION_HOGSIZE:
484         case MAC_SHARE_MISSION_HOGSIZE:
485                 strcpy(Mission_list[*count].filename,SHAREWARE_MISSION_FILENAME);
486                 strcpy(Mission_list[*count].mission_name,SHAREWARE_MISSION_NAME);
487                 Mission_list[*count].anarchy_only_flag = 0;
488                 break;
489         case OEM_MISSION_HOGSIZE:
490                 strcpy(Mission_list[*count].filename,OEM_MISSION_FILENAME);
491                 strcpy(Mission_list[*count].mission_name,OEM_MISSION_NAME);
492                 Mission_list[*count].anarchy_only_flag = 0;
493                 break;
494         default:
495                 Warning("Unknown hogsize %d, trying %s\n", Builtin_mission_hogsize, FULL_MISSION_FILENAME ".mn2");
496                 Int3(); //fall through
497         case FULL_MISSION_HOGSIZE:
498                 if (!read_mission_file(FULL_MISSION_FILENAME ".mn2", 0, ML_CURDIR))
499                         Error("Could not find required mission file <%s>", FULL_MISSION_FILENAME ".mn2");
500         }
501
502         strcpy(Builtin_mission_filename, Mission_list[*count].filename);
503         Mission_list[*count].descent_version = 2;
504         Mission_list[*count].anarchy_only_flag = 0;
505         ++(*count);
506 }
507
508
509 void add_missions_to_list(char *search_name, int *count, int anarchy_mode)
510 {
511         FILEFINDSTRUCT find;
512         if( !FileFindFirst( search_name, &find ) ) {
513                 do      {
514                         if (read_mission_file( find.name, *count, ML_MISSIONDIR )) {
515
516                                 if (anarchy_mode || !Mission_list[*count].anarchy_only_flag)
517                                         ++(*count);
518                         }
519
520                 } while( !FileFindNext( &find ) && *count < MAX_MISSIONS);
521                 FileFindClose();
522                 if (*count >= MAX_MISSIONS)
523                         mprintf((0, "Warning: more missions than d2x can handle\n"));
524         }
525 }
526
527 /* move <mission_name> to <place> on mission list, increment <place> */
528 void promote (char * mission_name, int * top_place, int num_missions)
529 {
530         int i;
531         char name[FILENAME_LEN], * t;
532         strcpy(name, mission_name);
533         if ((t = strchr(name,'.')) != NULL)
534                 *t = 0; //kill extension
535         //printf("promoting: %s\n", name);
536         for (i = *top_place; i < num_missions; i++)
537                 if (!stricmp(Mission_list[i].filename, name)) {
538                         //swap mission positions
539                         mle temp;
540
541                         temp = Mission_list[*top_place];
542                         Mission_list[*top_place] = Mission_list[i];
543                         Mission_list[i] = temp;
544                         ++(*top_place);
545                         break;
546                 }
547 }
548
549
550
551 //fills in the global list of missions.  Returns the number of missions
552 //in the list.  If anarchy_mode set, don't include non-anarchy levels.
553
554 extern char CDROM_dir[];
555 extern char AltHogDir[];
556 extern char AltHogdir_initialized;
557
558 int build_mission_list(int anarchy_mode)
559 {
560         static int num_missions=-1;
561         int count = 0;
562         int top_place;
563
564         //now search for levels on disk
565
566 //@@Took out this code because after this routine was called once for
567 //@@a list of single-player missions, a subsequent call for a list of
568 //@@anarchy missions would not scan again, and thus would not find the
569 //@@anarchy-only missions.  If we retain the minimum level of install,
570 //@@we may want to put the code back in, having it always scan for all
571 //@@missions, and have the code that uses it sort out the ones it wants.
572 //@@    if (num_missions != -1) {
573 //@@            if (Current_mission_num != 0)
574 //@@                    load_mission(0);                                //set built-in mission as default
575 //@@            return num_missions;
576 //@@    }
577
578         add_builtin_mission_to_list(&count);  //read built-in first
579         add_d1_builtin_mission_to_list(&count);
580         add_missions_to_list(MISSION_DIR "*.mn2", &count, anarchy_mode);
581         add_missions_to_list(MISSION_DIR "*.msn", &count, anarchy_mode);
582
583         if (AltHogdir_initialized) {
584                 char search_name[PATH_MAX + 5];
585                 strcpy(search_name, AltHogDir);
586                 strcat(search_name, "/" MISSION_DIR "*.mn2");
587                 add_missions_to_list(search_name, &count, anarchy_mode);
588                 strcpy(search_name, AltHogDir);
589                 strcat(search_name, "/" MISSION_DIR "*.msn");
590                 add_missions_to_list(search_name, &count, anarchy_mode);
591         }
592
593         // move original missions (in story-chronological order)
594         // to top of mission list
595         top_place = 0;
596         promote("descent", &top_place, count); // original descent 1 mission
597         D1_Builtin_mission_num = top_place - 1;
598         promote(Builtin_mission_filename, &top_place, count); // d2 or d2demo
599         Builtin_mission_num = top_place - 1;
600         promote("d2x", &top_place, count); // vertigo
601
602         if (count > top_place)
603                 qsort(&Mission_list[top_place],
604                       count - top_place,
605                       sizeof(*Mission_list),
606                                 (int (*)( const void *, const void * ))ml_sort_func);
607
608
609         if (count > top_place)
610                 qsort(&Mission_list[top_place],
611                       count - top_place,
612                       sizeof(*Mission_list),
613                       (int (*)( const void *, const void * ))ml_sort_func);
614
615         //load_mission(0);   //set built-in mission as default
616
617         num_missions = count;
618
619         return count;
620 }
621
622 void init_extra_robot_movie(char *filename);
623
624 //values for built-in mission
625
626 //loads the specfied mission from the mission list.
627 //build_mission_list() must have been called.
628 //Returns true if mission loaded ok, else false.
629 int load_mission(int mission_num)
630 {
631         CFILE *mfile;
632         char buf[80], *v;
633         int found_hogfile;
634         int enhanced_mission = 0;
635
636         if (mission_num == D1_Builtin_mission_num) {
637                 cfile_use_descent1_hogfile("descent.hog");
638                 switch (D1_Builtin_mission_hogsize) {
639                 case D1_MISSION_HOGSIZE:
640                 case D1_SHAREWARE_MISSION_HOGSIZE:
641                         return load_mission_d1(mission_num);
642                         break;
643                 default:
644                         // continue on...
645                 }
646         }
647
648         if (mission_num == Builtin_mission_num) {
649                 switch (Builtin_mission_hogsize) {
650                 case SHAREWARE_MISSION_HOGSIZE:
651                 case MAC_SHARE_MISSION_HOGSIZE:
652                         return load_mission_shareware(mission_num);
653                         break;
654                 case OEM_MISSION_HOGSIZE:
655                         return load_mission_oem(mission_num);
656                         break;
657                 case FULL_MISSION_HOGSIZE:
658                 default:
659                         // continue on...
660                 }
661         }
662
663         Current_mission_num = mission_num;
664
665         mprintf(( 0, "Loading mission %d\n", mission_num ));
666
667         //read mission from file
668
669         switch (Mission_list[mission_num].location) {
670         case ML_MISSIONDIR:
671                 strcpy(buf,MISSION_DIR);
672                 break;
673         case ML_CDROM:
674                 strcpy(buf,CDROM_dir);
675                 break;
676         default:
677                 Int3();                                                 //fall through
678         case ML_CURDIR:
679                 strcpy(buf,"");
680                 break;
681         }
682         strcat(buf,Mission_list[mission_num].filename);
683         if (Mission_list[mission_num].descent_version == 2)
684                 strcat(buf,".mn2");
685         else
686                 strcat(buf,".msn");
687
688         mfile = cfopen(buf,"rb");
689         if (mfile == NULL) {
690                 Current_mission_num = -1;
691                 return 0;               //error!
692         }
693
694         //for non-builtin missions, load HOG
695         if (strcmp(Mission_list[mission_num].filename, Builtin_mission_filename)) {
696
697                 strcpy(buf+strlen(buf)-4,".hog");               //change extension
698
699                 found_hogfile = cfile_use_alternate_hogfile(buf);
700
701                 #ifdef RELEASE                          //for release, require mission to be in hogfile
702                 if (! found_hogfile) {
703                         cfclose(mfile);
704                         Current_mission_num = -1;
705                         return 0;
706                 }
707                 #endif
708
709                 // for Descent 1 missions, load descent.hog
710                 if (Mission_list[mission_num].descent_version == 1 && strcmp(buf, "descent.hog"))
711                         if (!cfile_use_descent1_hogfile("descent.hog"))
712                                 Warning("descent.hog not available, this mission may be missing some files required for briefings\n");
713         }
714
715         //init vars
716         Last_level = 0;
717         Last_secret_level = 0;
718         Briefing_text_filename[0] = 0;
719         Ending_text_filename[0] = 0;
720
721         while (mfgets(buf,80,mfile)) {
722
723                 if (istok(buf,"name"))
724                         continue;                                               //already have name, go to next line
725                 if (istok(buf,"xname")) {
726                         enhanced_mission = 1;
727                         continue;                                               //already have name, go to next line
728                 }
729                 if (istok(buf,"zname")) {
730                         enhanced_mission = 2;
731                         continue;                                               //already have name, go to next line
732                 }
733                 else if (istok(buf,"type"))
734                         continue;                                               //already have name, go to next line
735                 else if (istok(buf,"hog")) {
736                         char    *bufp = buf;
737
738                         while (*(bufp++) != '=')
739                                 ;
740
741                         if (*bufp == ' ')
742                                 while (*(++bufp) == ' ')
743                                         ;
744
745                         cfile_use_alternate_hogfile(bufp);
746                         mprintf((0, "Hog file override = [%s]\n", bufp));
747                 }
748                 else if (istok(buf,"briefing")) {
749                         if ((v = get_value(buf)) != NULL) {
750                                 add_term(v);
751                                 if (strlen(v) < 13)
752                                         strcpy(Briefing_text_filename,v);
753                         }
754                 }
755                 else if (istok(buf,"ending")) {
756                         if ((v = get_value(buf)) != NULL) {
757                                 add_term(v);
758                                 if (strlen(v) < 13)
759                                         strcpy(Ending_text_filename,v);
760                         }
761                 }
762                 else if (istok(buf,"num_levels")) {
763
764                         if ((v=get_value(buf))!=NULL) {
765                                 int n_levels,i;
766
767                                 n_levels = atoi(v);
768
769                                 for (i=0;i<n_levels && mfgets(buf,80,mfile);i++) {
770
771                                         add_term(buf);
772                                         if (strlen(buf) <= 12) {
773                                                 strcpy(Level_names[i],buf);
774                                                 Last_level++;
775                                         }
776                                         else
777                                                 break;
778                                 }
779
780                         }
781                 }
782                 else if (istok(buf,"num_secrets")) {
783                         if ((v=get_value(buf))!=NULL) {
784                                 int i;
785
786                                 N_secret_levels = atoi(v);
787
788                                 Assert(N_secret_levels <= MAX_SECRET_LEVELS_PER_MISSION);
789
790                                 for (i=0;i<N_secret_levels && mfgets(buf,80,mfile);i++) {
791                                         char *t;
792
793                                         
794                                         if ((t=strchr(buf,','))!=NULL) *t++=0;
795                                         else
796                                                 break;
797
798                                         add_term(buf);
799                                         if (strlen(buf) <= 12) {
800                                                 strcpy(Secret_level_names[i],buf);
801                                                 Secret_level_table[i] = atoi(t);
802                                                 if (Secret_level_table[i]<1 || Secret_level_table[i]>Last_level)
803                                                         break;
804                                                 Last_secret_level--;
805                                         }
806                                         else
807                                                 break;
808                                 }
809
810                         }
811                 }
812
813         }
814
815         cfclose(mfile);
816
817         if (Last_level <= 0) {
818                 Current_mission_num = -1;               //no valid mission loaded
819                 return 0;
820         }
821
822         Current_mission_filename = Mission_list[Current_mission_num].filename;
823         Current_mission_longname = Mission_list[Current_mission_num].mission_name;
824
825         if (enhanced_mission) {
826                 char t[50];
827                 extern void bm_read_extra_robots();
828                 sprintf(t,"%s.ham",Current_mission_filename);
829                 bm_read_extra_robots(t,enhanced_mission);
830                 strncpy(t,Current_mission_filename,6);
831                 strcat(t,"-l.mvl");
832                 init_extra_robot_movie(t);
833         }
834
835         return 1;
836 }
837
838 //loads the named mission if exists.
839 //Returns true if mission loaded ok, else false.
840 int load_mission_by_name(char *mission_name)
841 {
842         int n,i;
843
844         n = build_mission_list(1);
845
846         for (i=0;i<n;i++)
847                 if (!stricmp(mission_name,Mission_list[i].filename))
848                         return load_mission(i);
849
850         return 0;               //couldn't find mission
851 }