/* $Id: mission.c,v 1.24 2003-11-04 08:03:08 btb Exp $ */
/*
THE COMPUTER CODE CONTAINED HEREIN IS THE SOLE PROPERTY OF PARALLAX
SOFTWARE CORPORATION ("PARALLAX").  PARALLAX, IN DISTRIBUTING THE CODE TO
END-USERS, AND SUBJECT TO ALL OF THE TERMS AND CONDITIONS HEREIN, GRANTS A
ROYALTY-FREE, PERPETUAL LICENSE TO SUCH END-USERS FOR USE BY SUCH END-USERS
IN USING, DISPLAYING,  AND CREATING DERIVATIVE WORKS THEREOF, SO LONG AS
SUCH USE, DISPLAY OR CREATION IS FOR NON-COMMERCIAL, ROYALTY OR REVENUE
FREE PURPOSES.  IN NO EVENT SHALL THE END-USER USE THE COMPUTER CODE
CONTAINED HEREIN FOR REVENUE-BEARING PURPOSES.  THE END-USER UNDERSTANDS
AND AGREES TO THE TERMS HEREIN AND ACCEPTS THE SAME BY USE OF THIS FILE.
COPYRIGHT 1993-1999 PARALLAX SOFTWARE CORPORATION.  ALL RIGHTS RESERVED.
*/

/*
 *
 * Code to handle multiple missions
 *
 * Old Log:
 * Revision 1.4  1995/10/31  10:21:40  allender
 * no mission support in shareware
 *
 * Revision 1.3  1995/10/21  22:53:04  allender
 * moved missions to data folder
 *
 * Revision 1.2  1995/09/13  08:47:29  allender
 * made to work with Chris' direct stuff
 *
 * Revision 1.1  1995/05/16  15:27:48  allender
 * Initial revision
 *
 * Revision 2.9  1995/05/26  16:16:32  john
 * Split SATURN into define's for requiring cd, using cd, etc.
 * Also started adding all the Rockwell stuff.
 *
 * Revision 2.8  1995/03/20  15:49:31  mike
 * Remove eof char from comment which confused make depend, causing
 * no mission.obj: line in makefile.  Pretty stupid tool, huh?
 *
 * Revision 2.7  1995/03/20  12:12:11  john
 * Added ifdef SATURN.
 *
 * Revision 2.6  1995/03/15  14:32:49  john
 * Added code to force the Descent CD-rom in the drive.
 *
 * Revision 2.5  1995/03/15  11:41:15  john
 * Better Saturn CD-ROM support.
 *
 * Revision 2.4  1995/03/14  18:24:14  john
 * Force Destination Saturn to use CD-ROM drive.
 *
 * Revision 2.3  1995/03/07  14:19:41  mike
 * More destination saturn stuff.
 *
 * Revision 2.2  1995/03/06  23:09:03  mike
 * more saturn stuff: make briefings work for saturn mission.
 *
 * Revision 2.1  1995/03/06  16:47:48  mike
 * destination saturn
 *
 * Revision 2.0  1995/02/27  11:27:49  john
 * New version 2.0, which has no anonymous unions, builds with
 * Watcom 10.0, and doesn't require parsing BITMAPS.TBL.
 *
 * Revision 1.14  1995/02/15  11:30:37  john
 * Fixed bug with potential mem overwrite on line 160.
 *
 * Revision 1.13  1995/02/10  17:53:20  matt
 * Changed mission name again
 *
 * Revision 1.12  1995/02/10  17:35:38  matt
 * Changed name of built-in mission
 *
 * Revision 1.11  1995/02/07  17:13:51  allender
 * removed return statement in load_mission so that built in mission will
 * actually set the Current_mission_name and _filename
 *
 * Revision 1.10  1995/01/31  01:19:45  matt
 * Made build_mission_list() sort missions by name
 *
 * Revision 1.9  1995/01/30  13:49:58  allender
 * changed build_mission_list in load_mission_by_name to include
 * anarchy levels.
 *
 * Revision 1.8  1995/01/30  13:03:51  matt
 * Fixed dumb mistake
 *
 * Revision 1.7  1995/01/30  12:55:22  matt
 * Added vars to point to mission names
 *
 * Revision 1.6  1995/01/22  18:57:28  matt
 * Made player highest level work with missions
 *
 * Revision 1.5  1995/01/22  14:13:08  matt
 * Added flag in mission list for anarchy-only missions
 *
 * Revision 1.4  1995/01/21  23:13:12  matt
 * Made high scores with (not work, really) with loaded missions
 * Don't give player high score when quit game
 *
 * Revision 1.3  1995/01/21  16:27:12  matt
 * Made endlevel briefing work with missions
 *
 * Revision 1.2  1995/01/20  22:47:50  matt
 * Mission system implemented, though imcompletely
 *
 * Revision 1.1  1995/01/20  13:42:19  matt
 * Initial revision
 *
 *
 */

#ifdef HAVE_CONFIG_H
#include <conf.h>
#endif

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <limits.h>

#include "pstypes.h"
#include "cfile.h"

#include "strutil.h"
#include "inferno.h"
#include "mission.h"
#include "gameseq.h"
#include "titles.h"
#include "songs.h"
#include "mono.h"
#include "error.h"
#include "findfile.h"

mle Mission_list[MAX_MISSIONS];

int Current_mission_num;
int N_secret_levels;    // Made a global by MK for scoring purposes.  August 1, 1995.
char *Current_mission_filename,*Current_mission_longname;

int Builtin_mission_num;
char Builtin_mission_filename[9];
int Builtin_mission_hogsize;

int D1_Builtin_mission_num;
char D1_Builtin_mission_filename[9];
int D1_Builtin_mission_hogsize;

//this stuff should get defined elsewhere

char Level_names[MAX_LEVELS_PER_MISSION][FILENAME_LEN];
char Secret_level_names[MAX_SECRET_LEVELS_PER_MISSION][FILENAME_LEN];

//values for d1 built-in mission
#define BIM_LAST_LEVEL          27
#define BIM_LAST_SECRET_LEVEL   -3
#define BIM_BRIEFING_FILE       "briefing.tex"
#define BIM_ENDING_FILE         "endreg.tex"

//
//  Special versions of mission routines for d1 builtins
//

int load_mission_d1(int mission_num)
{
	int i;

	cfile_use_descent1_hogfile("descent.hog");

	Current_mission_num = mission_num;
	Current_mission_filename = Mission_list[mission_num].filename;
	Current_mission_longname = Mission_list[mission_num].mission_name;

	switch (D1_Builtin_mission_hogsize) {
	case D1_SHAREWARE_MISSION_HOGSIZE:
	case D1_SHAREWARE_10_MISSION_HOGSIZE:
		N_secret_levels = 0;

		Last_level = 7;
		Last_secret_level = 0;

		//build level names
		for (i=0;i<Last_level;i++)
			sprintf(Level_names[i], "level%02d.sdl", i+1);

		break;
	case D1_MAC_SHARE_MISSION_HOGSIZE:
		N_secret_levels = 0;

		Last_level = 3;
		Last_secret_level = 0;

		//build level names
		for (i=0;i<Last_level;i++)
			sprintf(Level_names[i], "level%02d.sdl", i+1);

		break;
	case D1_OEM_MISSION_HOGSIZE:
	case D1_OEM_10_MISSION_HOGSIZE:
		N_secret_levels = 1;

		Last_level = 15;
		Last_secret_level = -1;

		//build level names
		for (i=0; i < Last_level - 1; i++)
			sprintf(Level_names[i], "level%02d.rdl", i+1);
		sprintf(Level_names[i], "saturn%02d.rdl", i+1);
		for (i=0; i < -Last_secret_level; i++)
			sprintf(Secret_level_names[i], "levels%1d.rdl", i+1);

		Secret_level_table[0] = 10;

		break;
	default:
		Int3(); // fall through
	case D1_MISSION_HOGSIZE:
	case D1_10_MISSION_HOGSIZE:
	case D1_MAC_MISSION_HOGSIZE:
		N_secret_levels = 3;

		Last_level = BIM_LAST_LEVEL;
		Last_secret_level = BIM_LAST_SECRET_LEVEL;

		//build level names
		for (i=0;i<Last_level;i++)
			sprintf(Level_names[i], "level%02d.rdl", i+1);
		for (i=0;i<-Last_secret_level;i++)
			sprintf(Secret_level_names[i], "levels%1d.rdl", i+1);

		Secret_level_table[0] = 10;
		Secret_level_table[1] = 21;
		Secret_level_table[2] = 24;

		break;
	}
	strcpy(Briefing_text_filename,BIM_BRIEFING_FILE);
	strcpy(Ending_text_filename,BIM_ENDING_FILE);

	return 1;
}


//
//  Special versions of mission routines for shareware
//

int load_mission_shareware(int mission_num)
{
	Current_mission_num = mission_num;
	Current_mission_filename = Mission_list[mission_num].filename;
	Current_mission_longname = Mission_list[mission_num].mission_name;

	switch (Builtin_mission_hogsize) {
	case MAC_SHARE_MISSION_HOGSIZE:
		N_secret_levels = 1;

		Last_level = 4;
		Last_secret_level = -1;

		// mac demo is using the regular hog and rl2 files
		strcpy(Level_names[0],"d2leva-1.rl2");
		strcpy(Level_names[1],"d2leva-2.rl2");
		strcpy(Level_names[2],"d2leva-3.rl2");
		strcpy(Level_names[3],"d2leva-4.rl2");
		strcpy(Secret_level_names[0],"d2leva-s.rl2");
		break;
	default:
		Int3(); // fall through
	case SHAREWARE_MISSION_HOGSIZE:
		N_secret_levels = 0;

		Last_level = 3;
		Last_secret_level = 0;

		strcpy(Level_names[0],"d2leva-1.sl2");
		strcpy(Level_names[1],"d2leva-2.sl2");
		strcpy(Level_names[2],"d2leva-3.sl2");
	}

	return 1;
}


//
//  Special versions of mission routines for Diamond/S3 version
//

int load_mission_oem(int mission_num)
{
	Current_mission_num = mission_num;
	Current_mission_filename = Mission_list[mission_num].filename;
	Current_mission_longname = Mission_list[mission_num].mission_name;

	N_secret_levels = 2;

	Last_level = 8;
	Last_secret_level = -2;

	strcpy(Level_names[0],"d2leva-1.rl2");
	strcpy(Level_names[1],"d2leva-2.rl2");
	strcpy(Level_names[2],"d2leva-3.rl2");
	strcpy(Level_names[3],"d2leva-4.rl2");

	strcpy(Secret_level_names[0],"d2leva-s.rl2");

	strcpy(Level_names[4],"d2levb-1.rl2");
	strcpy(Level_names[5],"d2levb-2.rl2");
	strcpy(Level_names[6],"d2levb-3.rl2");
	strcpy(Level_names[7],"d2levb-4.rl2");

	strcpy(Secret_level_names[1],"d2levb-s.rl2");

	Secret_level_table[0] = 1;
	Secret_level_table[1] = 5;

	return 1;
}


//strips damn newline from end of line
char *mfgets(char *s,int n,CFILE *f)
{
	char *r;

	r = cfgets(s,n,f);
	if (r && s[strlen(s)-1] == '\n')
		s[strlen(s)-1] = 0;

	return r;
}

//compare a string for a token. returns true if match
int istok(char *buf,char *tok)
{
	return strnicmp(buf,tok,strlen(tok)) == 0;

}

//adds a terminating 0 after a string at the first white space
void add_term(char *s)
{
	while (*s && !isspace(*s)) s++;

	*s = 0;		//terminate!
}

//returns ptr to string after '=' & white space, or NULL if no '='
//adds 0 after parm at first white space
char *get_value(char *buf)
{
	char *t;

	t = strchr(buf,'=')+1;

	if (t) {
		while (*t && isspace(*t)) t++;

		if (*t)
			return t;
	}

	return NULL;		//error!
}

//reads a line, returns ptr to value of passed parm.  returns NULL if none
char *get_parm_value(char *parm,CFILE *f)
{
	static char buf[80];

	if (!mfgets(buf,80,f))
		return NULL;

	if (istok(buf,parm))
		return get_value(buf);
	else
		return NULL;
}

int ml_sort_func(mle *e0,mle *e1)
{
	return stricmp(e0->mission_name,e1->mission_name);

}

extern char CDROM_dir[];

//returns 1 if file read ok, else 0
int read_mission_file(char *filename,int count,int location)
{
	char filename2[100];
	CFILE *mfile;

	//printf("reading: %s\n", filename);

	switch (location) {
		case ML_MISSIONDIR:
			strcpy(filename2,MISSION_DIR);
			break;

		case ML_CDROM:
			songs_stop_redbook();		//so we can read from the CD
			strcpy(filename2,CDROM_dir);
			break;

		default:
			Int3();		//fall through

		case ML_CURDIR:
			strcpy(filename2,"");
			break;
	}
	strcat(filename2,filename);

	mfile = cfopen(filename2,"rb");

	if (mfile) {
		char *p;
		char temp[FILENAME_LEN],*t;

		strcpy(temp,filename);
		if ((t = strchr(temp,'.')) == NULL)
			return 0;	//missing extension
		// look if it's .mn2 or .msn
		Mission_list[count].descent_version = (t[3] == '2') ? 2 : 1;
		*t = 0;			//kill extension

		strncpy( Mission_list[count].filename, temp, 9 );
		Mission_list[count].anarchy_only_flag = 0;
		Mission_list[count].location = location;

		p = get_parm_value("name",mfile);

		if (!p) {		//try enhanced mission
			cfseek(mfile,0,SEEK_SET);
			p = get_parm_value("xname",mfile);
		}

		if (!p) {       //try super-enhanced mission!
			cfseek(mfile,0,SEEK_SET);
			p = get_parm_value("zname",mfile);
		}

		if (p) {
			char *t;
			if ((t=strchr(p,';'))!=NULL)
				*t=0;
			t = p + strlen(p)-1;
			while (isspace(*t)) t--;
			strncpy(Mission_list[count].mission_name,p,MISSION_NAME_LEN);
		}
		else {
			cfclose(mfile);
			return 0;
		}

		p = get_parm_value("type",mfile);

		//get mission type
		if (p)
			Mission_list[count].anarchy_only_flag = istok(p,"anarchy");

		cfclose(mfile);

		return 1;
	}

	return 0;
}

void add_d1_builtin_mission_to_list(int *count)
{
	if (!cfexist("descent.hog"))
		return;

	D1_Builtin_mission_hogsize = cfile_size("descent.hog");

	switch (D1_Builtin_mission_hogsize) {
	case D1_SHAREWARE_MISSION_HOGSIZE:
	case D1_SHAREWARE_10_MISSION_HOGSIZE:
	case D1_MAC_SHARE_MISSION_HOGSIZE:
		strcpy(Mission_list[*count].filename, D1_MISSION_FILENAME);
		strcpy(Mission_list[*count].mission_name, D1_SHAREWARE_MISSION_NAME);
		Mission_list[*count].anarchy_only_flag = 0;
		break;
	case D1_OEM_MISSION_HOGSIZE:
	case D1_OEM_10_MISSION_HOGSIZE:
		strcpy(Mission_list[*count].filename, D1_MISSION_FILENAME);
		strcpy(Mission_list[*count].mission_name, D1_OEM_MISSION_NAME);
		Mission_list[*count].anarchy_only_flag = 0;
		break;
	default:
		Warning("Unknown D1 hogsize %d\n", D1_Builtin_mission_hogsize);
		Int3();
		// fall through
	case D1_MISSION_HOGSIZE:
	case D1_10_MISSION_HOGSIZE:
	case D1_MAC_MISSION_HOGSIZE:
		strcpy(Mission_list[*count].filename, D1_MISSION_FILENAME);
		strcpy(Mission_list[*count].mission_name, D1_MISSION_NAME);
		Mission_list[*count].anarchy_only_flag = 0;
		break;
	}

	strcpy(D1_Builtin_mission_filename, Mission_list[*count].filename);
	Mission_list[*count].descent_version = 1;
	Mission_list[*count].anarchy_only_flag = 0;
	++(*count);
}


void add_builtin_mission_to_list(int *count)
{
	Builtin_mission_hogsize = cfile_size("descent2.hog");
	if (Builtin_mission_hogsize == -1)
		Builtin_mission_hogsize = cfile_size("d2demo.hog");

	switch (Builtin_mission_hogsize) {
	case SHAREWARE_MISSION_HOGSIZE:
	case MAC_SHARE_MISSION_HOGSIZE:
		strcpy(Mission_list[*count].filename,SHAREWARE_MISSION_FILENAME);
		strcpy(Mission_list[*count].mission_name,SHAREWARE_MISSION_NAME);
		Mission_list[*count].anarchy_only_flag = 0;
		break;
	case OEM_MISSION_HOGSIZE:
		strcpy(Mission_list[*count].filename,OEM_MISSION_FILENAME);
		strcpy(Mission_list[*count].mission_name,OEM_MISSION_NAME);
		Mission_list[*count].anarchy_only_flag = 0;
		break;
	default:
		Warning("Unknown hogsize %d, trying %s\n", Builtin_mission_hogsize, FULL_MISSION_FILENAME ".mn2");
		Int3(); //fall through
	case FULL_MISSION_HOGSIZE:
	case FULL_10_MISSION_HOGSIZE:
	case MAC_FULL_MISSION_HOGSIZE:
		if (!read_mission_file(FULL_MISSION_FILENAME ".mn2", 0, ML_CURDIR))
			Error("Could not find required mission file <%s>", FULL_MISSION_FILENAME ".mn2");
	}

	strcpy(Builtin_mission_filename, Mission_list[*count].filename);
	Mission_list[*count].descent_version = 2;
	Mission_list[*count].anarchy_only_flag = 0;
	++(*count);
}


void add_missions_to_list(char *search_name, int *count, int anarchy_mode)
{
	FILEFINDSTRUCT find;
	if( !FileFindFirst( search_name, &find ) ) {
		do	{
			if (read_mission_file( find.name, *count, ML_MISSIONDIR )) {

				if (anarchy_mode || !Mission_list[*count].anarchy_only_flag)
					++(*count);
			}

		} while( !FileFindNext( &find ) && *count < MAX_MISSIONS);
		FileFindClose();
		if (*count >= MAX_MISSIONS)
			mprintf((0, "Warning: more missions than d2x can handle\n"));
	}
}

/* move <mission_name> to <place> on mission list, increment <place> */
void promote (char * mission_name, int * top_place, int num_missions)
{
	int i;
	char name[FILENAME_LEN], * t;
	strcpy(name, mission_name);
	if ((t = strchr(name,'.')) != NULL)
		*t = 0; //kill extension
	//printf("promoting: %s\n", name);
	for (i = *top_place; i < num_missions; i++)
		if (!stricmp(Mission_list[i].filename, name)) {
			//swap mission positions
			mle temp;

			temp = Mission_list[*top_place];
			Mission_list[*top_place] = Mission_list[i];
			Mission_list[i] = temp;
			++(*top_place);
			break;
		}
}



//fills in the global list of missions.  Returns the number of missions
//in the list.  If anarchy_mode set, don't include non-anarchy levels.

extern char CDROM_dir[];
extern char AltHogDir[];
extern char AltHogdir_initialized;

int build_mission_list(int anarchy_mode)
{
	static int num_missions=-1;
	int count = 0;
	int top_place;

	//now search for levels on disk

//@@Took out this code because after this routine was called once for
//@@a list of single-player missions, a subsequent call for a list of
//@@anarchy missions would not scan again, and thus would not find the
//@@anarchy-only missions.  If we retain the minimum level of install,
//@@we may want to put the code back in, having it always scan for all
//@@missions, and have the code that uses it sort out the ones it wants.
//@@	if (num_missions != -1) {
//@@		if (Current_mission_num != 0)
//@@			load_mission(0);				//set built-in mission as default
//@@		return num_missions;
//@@	}

	add_builtin_mission_to_list(&count);  //read built-in first
	add_d1_builtin_mission_to_list(&count);
	add_missions_to_list(MISSION_DIR "*.mn2", &count, anarchy_mode);
	add_missions_to_list(MISSION_DIR "*.msn", &count, anarchy_mode);

	if (AltHogdir_initialized) {
		char search_name[PATH_MAX + 5];
		strcpy(search_name, AltHogDir);
		strcat(search_name, "/" MISSION_DIR "*.mn2");
		add_missions_to_list(search_name, &count, anarchy_mode);
		strcpy(search_name, AltHogDir);
		strcat(search_name, "/" MISSION_DIR "*.msn");
		add_missions_to_list(search_name, &count, anarchy_mode);
	}

	// move original missions (in story-chronological order)
	// to top of mission list
	top_place = 0;
	promote("descent", &top_place, count); // original descent 1 mission
	D1_Builtin_mission_num = top_place - 1;
	promote(Builtin_mission_filename, &top_place, count); // d2 or d2demo
	Builtin_mission_num = top_place - 1;
	promote("d2x", &top_place, count); // vertigo

	if (count > top_place)
		qsort(&Mission_list[top_place],
		      count - top_place,
		      sizeof(*Mission_list),
 				(int (*)( const void *, const void * ))ml_sort_func);


	if (count > top_place)
		qsort(&Mission_list[top_place],
		      count - top_place,
		      sizeof(*Mission_list),
		      (int (*)( const void *, const void * ))ml_sort_func);

	//load_mission(0);   //set built-in mission as default

	num_missions = count;

	return count;
}

void init_extra_robot_movie(char *filename);

//values for built-in mission

//loads the specfied mission from the mission list.
//build_mission_list() must have been called.
//Returns true if mission loaded ok, else false.
int load_mission(int mission_num)
{
	CFILE *mfile;
	char buf[80], *v;
	int found_hogfile;
	int enhanced_mission = 0;

	if (mission_num == D1_Builtin_mission_num) {
		cfile_use_descent1_hogfile("descent.hog");
		switch (D1_Builtin_mission_hogsize) {
		default:
			Int3(); // fall through
		case D1_MISSION_HOGSIZE:
		case D1_10_MISSION_HOGSIZE:
		case D1_MAC_MISSION_HOGSIZE:
		case D1_OEM_MISSION_HOGSIZE:
		case D1_OEM_10_MISSION_HOGSIZE:
		case D1_SHAREWARE_MISSION_HOGSIZE:
		case D1_SHAREWARE_10_MISSION_HOGSIZE:
		case D1_MAC_SHARE_MISSION_HOGSIZE:
			return load_mission_d1(mission_num);
			break;
		}
	}

	if (mission_num == Builtin_mission_num) {
		switch (Builtin_mission_hogsize) {
		case SHAREWARE_MISSION_HOGSIZE:
		case MAC_SHARE_MISSION_HOGSIZE:
			return load_mission_shareware(mission_num);
			break;
		case OEM_MISSION_HOGSIZE:
			return load_mission_oem(mission_num);
			break;
		default:
			Int3(); // fall through
		case FULL_MISSION_HOGSIZE:
		case FULL_10_MISSION_HOGSIZE:
		case MAC_FULL_MISSION_HOGSIZE:
			// continue on... (use d2.mn2 from hogfile)
			break;
		}
	}

	Current_mission_num = mission_num;

	mprintf(( 0, "Loading mission %d\n", mission_num ));

	//read mission from file

	switch (Mission_list[mission_num].location) {
	case ML_MISSIONDIR:
		strcpy(buf,MISSION_DIR);
		break;
	case ML_CDROM:
		strcpy(buf,CDROM_dir);
		break;
	default:
		Int3();							//fall through
	case ML_CURDIR:
		strcpy(buf,"");
		break;
	}
	strcat(buf,Mission_list[mission_num].filename);
	if (Mission_list[mission_num].descent_version == 2)
		strcat(buf,".mn2");
	else
		strcat(buf,".msn");

	mfile = cfopen(buf,"rb");
	if (mfile == NULL) {
		Current_mission_num = -1;
		return 0;		//error!
	}

	//for non-builtin missions, load HOG
	if (strcmp(Mission_list[mission_num].filename, Builtin_mission_filename)) {

		strcpy(buf+strlen(buf)-4,".hog");		//change extension

		found_hogfile = cfile_use_alternate_hogfile(buf);

		#ifdef RELEASE				//for release, require mission to be in hogfile
		if (! found_hogfile) {
			cfclose(mfile);
			Current_mission_num = -1;
			return 0;
		}
		#endif

		// for Descent 1 missions, load descent.hog
		if (Mission_list[mission_num].descent_version == 1 && strcmp(buf, "descent.hog"))
			if (!cfile_use_descent1_hogfile("descent.hog"))
				Warning("descent.hog not available, this mission may be missing some files required for briefings and exit sequence\n");
	}

	//init vars
	Last_level = 0;
	Last_secret_level = 0;
	Briefing_text_filename[0] = 0;
	Ending_text_filename[0] = 0;

	while (mfgets(buf,80,mfile)) {

		if (istok(buf,"name"))
			continue;						//already have name, go to next line
		if (istok(buf,"xname")) {
			enhanced_mission = 1;
			continue;						//already have name, go to next line
		}
		if (istok(buf,"zname")) {
			enhanced_mission = 2;
			continue;						//already have name, go to next line
		}
		else if (istok(buf,"type"))
			continue;						//already have name, go to next line
		else if (istok(buf,"hog")) {
			char	*bufp = buf;

			while (*(bufp++) != '=')
				;

			if (*bufp == ' ')
				while (*(++bufp) == ' ')
					;

			cfile_use_alternate_hogfile(bufp);
			mprintf((0, "Hog file override = [%s]\n", bufp));
		}
		else if (istok(buf,"briefing")) {
			if ((v = get_value(buf)) != NULL) {
				add_term(v);
				if (strlen(v) < 13)
					strcpy(Briefing_text_filename,v);
			}
		}
		else if (istok(buf,"ending")) {
			if ((v = get_value(buf)) != NULL) {
				add_term(v);
				if (strlen(v) < 13)
					strcpy(Ending_text_filename,v);
			}
		}
		else if (istok(buf,"num_levels")) {

			if ((v=get_value(buf))!=NULL) {
				int n_levels,i;

				n_levels = atoi(v);

				for (i=0;i<n_levels && mfgets(buf,80,mfile);i++) {

					add_term(buf);
					if (strlen(buf) <= 12) {
						strcpy(Level_names[i],buf);
						Last_level++;
					}
					else
						break;
				}

			}
		}
		else if (istok(buf,"num_secrets")) {
			if ((v=get_value(buf))!=NULL) {
				int i;

				N_secret_levels = atoi(v);

				Assert(N_secret_levels <= MAX_SECRET_LEVELS_PER_MISSION);

				for (i=0;i<N_secret_levels && mfgets(buf,80,mfile);i++) {
					char *t;

					
					if ((t=strchr(buf,','))!=NULL) *t++=0;
					else
						break;

					add_term(buf);
					if (strlen(buf) <= 12) {
						strcpy(Secret_level_names[i],buf);
						Secret_level_table[i] = atoi(t);
						if (Secret_level_table[i]<1 || Secret_level_table[i]>Last_level)
							break;
						Last_secret_level--;
					}
					else
						break;
				}

			}
		}

	}

	cfclose(mfile);

	if (Last_level <= 0) {
		Current_mission_num = -1;		//no valid mission loaded
		return 0;
	}

	Current_mission_filename = Mission_list[Current_mission_num].filename;
	Current_mission_longname = Mission_list[Current_mission_num].mission_name;

	if (enhanced_mission) {
		char t[50];
		extern void bm_read_extra_robots();
		sprintf(t,"%s.ham",Current_mission_filename);
		bm_read_extra_robots(t,enhanced_mission);
		strncpy(t,Current_mission_filename,6);
		strcat(t,"-l.mvl");
		init_extra_robot_movie(t);
	}

	return 1;
}

//loads the named mission if exists.
//Returns true if mission loaded ok, else false.
int load_mission_by_name(char *mission_name)
{
	int n,i;

	n = build_mission_list(1);

	for (i=0;i<n;i++)
		if (!stricmp(mission_name,Mission_list[i].filename))
			return load_mission(i);

	return 0;		//couldn't find mission
}