platform and pstypes cleanup:

[taylor/freespace2.git] / src / mission / missioncampaign.cpp

/*
 * Copyright (C) Volition, Inc. 1999.  All rights reserved.
 *
 * All source code herein is the property of Volition, Inc. You may not sell 
 * or otherwise commercially exploit the source or things you created based on
 * the source.
 */

/*
 * $Logfile: /Freespace2/code/Mission/MissionCampaign.cpp $
 * $Revision$
 * $Date$
 * $Author$
 *
 * source for dealing with campaigns
 *
 * $Log$
 * Revision 1.8  2003/06/11 18:30:33  taylor
 * plug memory leaks
 *
 * Revision 1.7  2003/05/25 02:30:42  taylor
 * Freespace 1 support
 *
 * Revision 1.6  2002/07/24 00:20:42  relnev
 * nothing interesting
 *
 * Revision 1.5  2002/06/21 03:34:05  relnev
 * implemented a stub and fixed a path
 *
 * Revision 1.4  2002/06/09 04:41:22  relnev
 * added copyright header
 *
 * Revision 1.3  2002/06/09 03:16:04  relnev
 * added _splitpath.
 *
 * removed unneeded asm, old sdl 2d setup.
 *
 * fixed crash caused by opengl_get_region.
 *
 * Revision 1.2  2002/06/02 04:26:34  relnev
 * warning cleanup
 *
 * Revision 1.1.1.1  2002/05/03 03:28:09  root
 * Initial import.
 *
 * 
 * 23    9/14/99 4:35a Dave
 * Argh. Added all kinds of code to handle potential crashes in debriefing
 * code.
 * 
 * 22    9/09/99 11:40p Dave
 * Handle an SDL_assert() in beam code. Added supernova sounds. Play the right
 * 2 end movies properly, based upon what the player did in the mission.
 * 
 * 21    9/09/99 9:34a Jefff
 * fixed a potential exit-loop bug
 * 
 * 20    9/07/99 6:55p Jefff
 * functionality to break out of a loop.  hacked functionality to jump to
 * a specific mission in a campaign -- doesnt grant ships/weapons from
 * skipped missions tho.
 * 
 * 19    9/07/99 2:19p Jefff
 * clear skip mission player vars on mission skip
 * 
 * 18    9/06/99 9:45p Jefff
 * break out of loop and skip mission support
 * 
 * 17    9/06/99 6:38p Dave
 * Improved CD detection code.
 * 
 * 16    9/03/99 1:32a Dave
 * CD checking by act. Added support to play 2 cutscenes in a row
 * seamlessly. Fixed super low level cfile bug related to files in the
 * root directory of a CD. Added cheat code to set campaign mission # in
 * main hall.
 * 
 * 15    8/27/99 12:04a Dave
 * Campaign loop screen.
 * 
 * 14    8/04/99 5:36p Andsager
 * Show upsell screens at end of demo campaign before returning to main
 * hall.
 * 
 * 13    2/05/99 3:50p Anoop
 * Removed dumb campaign mission stats saving from multiplayer.
 * 
 * 12    12/17/98 2:43p Andsager
 * Modify fred campaign save file to include optional mission loops
 * 
 * 11    12/12/98 3:17p Andsager
 * Clean up mission eval, goal, event and mission scoring.
 * 
 * 10    12/10/98 9:59a Andsager
 * Fix some bugs with mission loops
 * 
 * 9     12/09/98 1:56p Andsager
 * Initial checkin of mission loop
 * 
 * 8     11/05/98 5:55p Dave
 * Big pass at reducing #includes
 * 
 * 7     11/03/98 4:48p Johnson
 * Fixed campaign file versioning bug left over from Silent Threat port.
 * 
 * 6     10/23/98 3:51p Dave
 * Full support for tstrings.tbl and foreign languages. All that remains
 * is to make it active in Fred.
 * 
 * 5     10/13/98 2:47p Andsager
 * Remove reference to Tech_shivan_species_avail
 * 
 * 4     10/13/98 9:28a Dave
 * Started neatening up freespace.h. Many variables renamed and
 * reorganized. Added AlphaColors.[h,cpp]
 * 
 * 3     10/07/98 6:27p Dave
 * Globalized mission and campaign file extensions. Removed Silent Threat
 * special code. Moved \cache \players and \multidata into the \data
 * directory.
 * 
 * 2     10/07/98 10:53a Dave
 * Initial checkin.
 * 
 * 1     10/07/98 10:49a Dave
 * 
 * 95    9/10/98 1:17p Dave
 * Put in code to flag missions and campaigns as being MD or not in Fred
 * and Freespace. Put in multiplayer support for filtering out MD
 * missions. Put in multiplayer popups for warning of non-valid missions.
 * 
 * 94    9/01/98 4:25p Dave
 * Put in total (I think) backwards compatibility between mission disk
 * freespace and non mission disk freespace, including pilot files and
 * campaign savefiles.
 * 
 * 93    7/06/98 4:10p Hoffoss
 * Fixed some bugs that presented themselves when trying to use a pilot
 * that has a no longer existent campaign active.  Also expanded the
 * campaign load code to actually return a proper error code, instead of
 * always trapping errors internally and crashing, and always returning 0.
 * 
 * 92    6/17/98 9:30a Allender
 * fixed red alert replay stats clearing problem
 * 
 * 91    6/01/98 11:43a John
 * JAS & MK:  Classified all strings for localization.
 * 
 * 90    5/25/98 1:29p Allender
 * end mission sequencing
 * 
 * 89    5/21/98 9:25p Allender
 * endgame movie always viewable at end of campaign
 * 
 * 88    5/13/98 5:14p Allender
 * red alert support to go back to previous mission
 * 
 * 87    5/12/98 4:16p Hoffoss
 * Fixed bug where not all missions in all campaigns were being filtered
 * out of stand alone mission listing in simulator room.
 * 
 * 86    5/05/98 3:29p Hoffoss
 * Changed code so description is BEFORE num players in campaign file.
 * Other code is relying on this ordering.
 * 
 * 85    5/05/98 12:19p Dave
 * campaign description goes *after* num players
 * 
 * 84    5/04/98 5:52p Comet
 * Fixed bug with Galatea/Bastion selection when finishing missions.
 * 
 * 83    5/01/98 2:46p Duncan
 * fix a cfile problem with campaigns related to the new cfile stuff
 * 
 * 82    5/01/98 12:34p John
 * Added code to force FreeSpace to run in the same dir as exe and made
 * all the parse error messages a little nicer.
 * 
 * 81    4/30/98 7:01p Duncan
 * AL: don't allow deletion of campaign files in multiplayer
 * 
 * 80    4/30/98 4:53p John
 * Restructured and cleaned up cfile code.  Added capability to read off
 * of CD-ROM drive and out of multiple pack files.
 *
 * $NoKeywords: $
 */

#include <stdio.h>
#ifndef PLAT_UNIX
#include <direct.h>
#include <io.h>
#else
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <dirent.h>
#include <fnmatch.h>
#endif
#include <string.h>
#include <setjmp.h>
#include <errno.h>

#include "key.h"
#include "ui.h"
#include "missioncampaign.h"
#include "gamesequence.h"
#include "2d.h"
#include "parselo.h"
#include "missionload.h"
#include "freespace.h"
#include "sexp.h"
#include "cfile.h"
#include "player.h"
#include "missiongoals.h"
#include "movie.h"
#include "multi.h"
#include "techmenu.h"
#include "eventmusic.h"
#include "alphacolors.h"
#include "localize.h"
#include "supernova.h"

// mission disk stuff
#define CAMPAIGN_SAVEFILE_MAX_SHIPS_OLD                                         75
#define CAMPAIGN_SAVEFILE_MAX_WEAPONS_OLD                                               44

#define CAMPAIGN_INITIAL_RELEASE_FILE_VERSION                           6

// campaign wasn't ended
int Campaign_ended_in_mission = 0;

// stuff for selecting campaigns.  We need to keep both arrays around since we display the
// list of campaigns by name, but must load campaigns by filename
char *Campaign_names[MAX_CAMPAIGNS];
char *Campaign_file_names[MAX_CAMPAIGNS];
int     Num_campaigns;

const char *campaign_types[MAX_CAMPAIGN_TYPES] = 
{
//XSTR:OFF
        "single",
        "multi coop",
        "multi teams"
//XSTR:ON
};

// modules local variables to deal with getting new ships/weapons available to the player
int Num_granted_ships, Num_granted_weapons;             // per mission counts of new ships and weapons
int Granted_ships[MAX_SHIP_TYPES];
int Granted_weapons[MAX_WEAPON_TYPES];

// variables to control the UI stuff for loading campaigns
static UI_WINDOW Campaign_window;
static UI_LISTBOX Campaign_listbox;
static UI_BUTTON Campaign_okb, Campaign_cancelb;

// the campaign!!!!!
campaign Campaign;

// variables with deal with the campaign save file
#define CAMPAIGN_FILE_VERSION                                                   12
//#define CAMPAIGN_FILE_COMPATIBLE_VERSION              CAMPAIGN_INITIAL_RELEASE_FILE_VERSION
#define CAMPAIGN_FILE_COMPATIBLE_VERSION                        CAMPAIGN_FILE_VERSION
#define CAMPAIGN_FILE_ID                                                                0xbeefcafe

// variables with deal with the campaign stats save file
#define CAMPAIGN_STATS_FILE_VERSION                                     1
#define CAMPAIGN_STATS_FILE_COMPATIBLE_VERSION  1
#define CAMPAIGN_STATS_FILE_ID                                          0xabbadaad

// mission_campaign_get_name returns a string (which is malloced in this routine) of the name
// of the given freespace campaign file.  In the type field, we return if the campaign is a single
// player or multiplayer campaign.  The type field will only be valid if the name returned is non-NULL
int mission_campaign_get_info(const char *filename, char *name, int *type, int *max_players, char **desc)
{
        int rval, i;
        char campaign_type[NAME_LENGTH], fname[MAX_FILENAME_LEN];

        SDL_assert( name != NULL );
        SDL_assert( type != NULL );

        // open localization
        lcl_ext_open();

        SDL_strlcpy(fname, filename, sizeof(fname));
        if ((strlen(fname) < 4) || SDL_strcasecmp(fname + strlen(fname) - 4, FS_CAMPAIGN_FILE_EXT)){
                SDL_strlcat(fname, FS_CAMPAIGN_FILE_EXT, sizeof(fname));
        }

        SDL_assert(strlen(fname) < MAX_FILENAME_LEN);

        if ((rval = setjmp(parse_abort)) != 0) {
                if (rval == 5){
                        // close localization
                        lcl_ext_close();

                        return 0;
                }

                Error(LOCATION, "Error parsing '%s'\r\nError code = %i.\r\n", fname, rval);

        } else {
                read_file_text( fname );
                reset_parse();
                required_string("$Name:");

                stuff_string( name, F_NAME, NULL );
                if ( name == NULL ) {
                        Int3();
                        nprintf(("Warning", "No name found for campaign file %s\n", filename));

                        // close localization
                        lcl_ext_close();

                        return 0;
                }

                required_string( "$Type:" );
                stuff_string( campaign_type, F_NAME, NULL );

                *type = -1;
                for (i=0; i<MAX_CAMPAIGN_TYPES; i++) {
                        if ( !SDL_strcasecmp(campaign_type, campaign_types[i]) ) {
                                *type = i;
                        }
                }

                if (desc) {
                        *desc = NULL;
                        if (optional_string("+Description:")) {
                                *desc = stuff_and_malloc_string(F_MULTITEXT, NULL, MISSION_DESC_LENGTH);
                        }
                }

                // if this is a multiplayer campaign, get the max players
                if ((*type) > 0) {
                        skip_to_string("+Num Players:");
                        stuff_int(max_players);
                }               

                // if we found a valid campaign type
                if ((*type) >= 0) {
                        // close localization
                        lcl_ext_close();

                        return 1;
                }
        }

        Int3();         // get Allender -- incorrect type found

        // close localization
        lcl_ext_close();

        return 0;
}

// parses campaign and returns a list of missions in it.  Returns number of missions added to
// the 'list', and up to 'max' missions may be added to 'list'.  Returns negative on error.
//
int mission_campaign_get_mission_list(const char *filename, char **list, int max)
{
        int rval, i, num = 0;
        char name[NAME_LENGTH];

        filename = cf_add_ext(filename, FS_CAMPAIGN_FILE_EXT);

        // read the mission file and get the list of mission filenames
        if ((rval = setjmp(parse_abort)) != 0) {
                // since we can't return count of allocated elements, free them instead
                for (i=0; i<num; i++)
                        free(list[i]);

                return -1;

        } else {
                read_file_text(filename);
                reset_parse();

                while (skip_to_string("$Mission:") > 0) {
                        stuff_string(name, F_NAME, NULL);
                        if (num < max)
                                list[num++] = strdup(name);
                }
        }

        return num;
}

void mission_campaign_maybe_add( const char *filename, int multiplayer )
{
        char name[NAME_LENGTH];
        int type,max_players;

        if ( mission_campaign_get_info( filename, name, &type, &max_players) ) {
                if ( !multiplayer && ( type == CAMPAIGN_TYPE_SINGLE) ) {
                        Campaign_names[Num_campaigns] = strdup(name);
                        Campaign_file_names[Num_campaigns] = strdup(filename);
                        Num_campaigns++;
                }
        }
}

// mission_campaign_build_list() builds up the list of campaigns that the user might
// be able to pick from.  It uses the multiplayer flag to tell if we should display a list
// of single or multiplayer campaigns.  This routine sets the Num_campaigns and Campaign_names
// global variables
void mission_campaign_build_list( int multiplayer )
{
#ifdef PLAT_UNIX
        DIR *dirp;
        struct dirent *dir;
        char wild_card[256];
        
        Num_campaigns = 0;
        mission_campaign_maybe_add( BUILTIN_CAMPAIGN, multiplayer);     
        
        SDL_strlcpy(wild_card, "Data/Missions", sizeof(wild_card));
        
        dirp = opendir(wild_card);
        if (dirp) {
                while ((dir = readdir(dirp)) != NULL) {
                        if ( Num_campaigns >= MAX_CAMPAIGNS )
                                break;
                                
                        if (fnmatch("*"FS_CAMPAIGN_FILE_EXT, dir->d_name, 0) == 0) {
                                if (SDL_strcasecmp(dir->d_name, BUILTIN_CAMPAIGN) == 0)
                                        continue;
                                
                                char fn[MAX_PATH_LEN];
                                SDL_snprintf(fn, sizeof(fn), "%s/%s", wild_card, dir->d_name);
                        
                                struct stat buf;
                                if (stat(fn, &buf) == -1) {
                                        continue;
                                }
                        
                                if (!S_ISREG(buf.st_mode)) {
                                        continue;
                                }
                                
                                mission_campaign_maybe_add(dir->d_name, multiplayer);
                        }
                }
                closedir(dirp);
        }       
#else
        int find_handle;
        _finddata_t find;
        char wild_card[MAX_PATH_LEN];

        Num_campaigns = 0;
        mission_campaign_maybe_add( BUILTIN_CAMPAIGN, multiplayer);

        memset(wild_card, 0, sizeof(wild_card));
        SDL_strlcpy(wild_card, NOX("data\\missions\\*"), sizeof(wild_card));
        SDL_strlcat(wild_card, FS_CAMPAIGN_FILE_EXT, sizeof(wild_card));
        find_handle = _findfirst( wild_card, &find );
        if( find_handle != -1 ) {
                if ( !(find.attrib & _A_SUBDIR) && SDL_strcasecmp(find.name, BUILTIN_CAMPAIGN) ){
                        mission_campaign_maybe_add( find.name, multiplayer);
                }

                while( !_findnext( find_handle, &find ) )       {
                        if ( !(find.attrib & _A_SUBDIR) && SDL_strcasecmp(find.name, BUILTIN_CAMPAIGN) )        {
                                if ( Num_campaigns >= MAX_CAMPAIGNS ){
                                        //MessageBox( -2,-2, 1, "Only the first 300 files will be displayed.", "Ok" );
                                        break;
                                } else {
                                        mission_campaign_maybe_add( find.name, multiplayer);
                                }
                        }
                }
        }
#endif
}

// gets optional ship/weapon information
void mission_campaign_get_sw_info()
{
        int i, count, ship_list[MAX_SHIP_TYPES], weapon_list[MAX_WEAPON_TYPES];

        // set allowable ships to the SIF_PLAYER_SHIPs
        memset( Campaign.ships_allowed, 0, sizeof(Campaign.ships_allowed) );
        for (i = 0; i < MAX_SHIP_TYPES; i++ ) {
                if ( Ship_info[i].flags & SIF_PLAYER_SHIP )
                        Campaign.ships_allowed[i] = 1;
        }

        for (i = 0; i < MAX_WEAPON_TYPES; i++ )
                Campaign.weapons_allowed[i] = 1;

        if ( optional_string("+Starting Ships:") ) {
                for (i = 0; i < MAX_SHIP_TYPES; i++ )
                        Campaign.ships_allowed[i] = 0;

                count = stuff_int_list(ship_list, MAX_SHIP_TYPES, SHIP_INFO_TYPE);

                // now set the array elements stating which ships we are allowed
                for (i = 0; i < count; i++ ) {
                        if ( Ship_info[ship_list[i]].flags & SIF_PLAYER_SHIP )
                                Campaign.ships_allowed[ship_list[i]] = 1;
                }
        }

        if ( optional_string("+Starting Weapons:") ) {
                for (i = 0; i < MAX_WEAPON_TYPES; i++ )
                        Campaign.weapons_allowed[i] = 0;

                count = stuff_int_list(weapon_list, MAX_WEAPON_TYPES, WEAPON_POOL_TYPE);

                // now set the array elements stating which ships we are allowed
                for (i = 0; i < count; i++ )
                        Campaign.weapons_allowed[weapon_list[i]] = 1;
        }
}

// mission_campaign_load starts a new campaign.  It reads in the mission information in the campaign file
// It also sets up all variables needed inside of the game to deal with starting mission numbers, etc
//
// Note: Due to difficulties in generalizing this function, parts of it are duplicated throughout
// this file.  If you change the format of the campaign file, you should be sure these related
// functions work properly and update them if it breaks them.
int mission_campaign_load( const char *filename, int load_savefile )
{
        int len, rval, i;
        char name[NAME_LENGTH], type[NAME_LENGTH];

        filename = cf_add_ext(filename, FS_CAMPAIGN_FILE_EXT);

        // open localization
        lcl_ext_open(); 

        // read the mission file and get the list of mission filenames
        if ((rval = setjmp(parse_abort)) != 0) {
                mprintf(("Error parsing '%s'\r\nError code = %i.\r\n", filename, rval));

                // close localization
                lcl_ext_close();

                return CAMPAIGN_ERROR_CORRUPT;

        } else {
                // be sure to remove all old malloced strings of Mission_names
                // we must also free any goal stuff that was from a previous campaign
                // this also frees sexpressions so the next call to init_sexp will be able to reclaim
                // nodes previously used by another campaign.
                mission_campaign_close();

                SDL_strlcpy( Campaign.filename, filename, sizeof(Campaign.filename) );

                // only initialize the sexpression stuff when Fred isn't running.  It'll screw things up major
                // if it does
                if ( !Fred_running ){
                        init_sexp();            // must initialize the sexpression stuff
                }

                read_file_text( filename );
                reset_parse();
                memset( &Campaign, 0, sizeof(Campaign) );

                // copy filename to campaign structure minus the extension
                len = min(strlen(filename) - 4 + 1, sizeof(Campaign.filename));
                SDL_strlcpy(Campaign.filename, filename, len);

                required_string("$Name:");
                stuff_string( name, F_NAME, NULL );
                
                //Store campaign name in the global struct
                SDL_strlcpy( Campaign.name, name, sizeof(Campaign.name) );

                required_string( "$Type:" );
                stuff_string( type, F_NAME, NULL );

                for (i = 0; i < MAX_CAMPAIGN_TYPES; i++ ) {
                        if ( !SDL_strcasecmp(type, campaign_types[i]) ) {
                                Campaign.type = i;
                                break;
                        }
                }

                if ( i == MAX_CAMPAIGN_TYPES )
                        Error(LOCATION, "Unknown campaign type %s!", type);

                Campaign.desc = NULL;
                if (optional_string("+Description:"))
                        Campaign.desc = stuff_and_malloc_string(F_MULTITEXT, NULL, MISSION_DESC_LENGTH);

                // if the type is multiplayer -- get the number of players
                Campaign.num_players = 0;
                if ( Campaign.type != CAMPAIGN_TYPE_SINGLE) {
                        required_string("+Num players:");
                        stuff_int( &(Campaign.num_players) );
                }               

#ifdef MAKE_FS1
                // check if mission disk -
                // doesn't do anything but prevent non fatal error messages
                optional_string("+Missiondisk");
#endif
                
                // parse the optional ship/weapon information
                mission_campaign_get_sw_info();

                // parse the mission file and actually read in the mission stuff
                Campaign.num_missions = 0;
                while ( required_string_either("#End", "$Mission:") ) {
                        cmission *cm;

                        required_string("$Mission:");
                        stuff_string(name, F_NAME, NULL);
                        cm = &Campaign.missions[Campaign.num_missions];
                        cm->name = strdup(name);

                        cm->briefing_cutscene[0] = 0;
                        if ( optional_string("+Briefing Cutscene:") )
                                stuff_string( cm->briefing_cutscene, F_NAME, NULL );

                        cm->flags = 0;
                        if (optional_string("+Flags:"))
                                stuff_int(&cm->flags);

                        cm->formula = -1;
                        if ( optional_string("+Formula:") ) {
                                cm->formula = get_sexp_main();
                                if ( !Fred_running ) {
                                        SDL_assert ( cm->formula != -1 );
                                        sexp_mark_persistent( cm->formula );

                                } else {
                                        if ( cm->formula == -1 ){
                                                // close localization
                                                lcl_ext_close();

                                                return CAMPAIGN_ERROR_SEXP_EXHAUSTED;
                                        }
                                }
                        }

                        // Do misison looping stuff
                        cm->has_mission_loop = 0;
                        if ( optional_string("+Mission Loop:") ) {
                                cm->has_mission_loop = 1;
                        }

                        cm->mission_loop_desc = NULL;
                        if ( optional_string("+Mission Loop Text:")) {
                                cm->mission_loop_desc = stuff_and_malloc_string(F_MULTITEXT, NULL, MISSION_DESC_LENGTH);
                        }

                        cm->mission_loop_brief_anim = NULL;
                        if ( optional_string("+Mission Loop Brief Anim:")) {
                                cm->mission_loop_brief_anim = stuff_and_malloc_string(F_MULTITEXT, NULL, MAX_FILENAME_LEN);
                        }

                        cm->mission_loop_brief_sound = NULL;
                        if ( optional_string("+Mission Loop Brief Sound:")) {
                                cm->mission_loop_brief_sound = stuff_and_malloc_string(F_MULTITEXT, NULL, MAX_FILENAME_LEN);
                        }

                        cm->mission_loop_formula = -1;
                        if ( optional_string("+Formula:") ) {
                                cm->mission_loop_formula = get_sexp_main();
                                if ( !Fred_running ) {
                                        SDL_assert ( cm->mission_loop_formula != -1 );
                                        sexp_mark_persistent( cm->mission_loop_formula );

                                } else {
                                        if ( cm->mission_loop_formula == -1 ){
                                                // close localization
                                                lcl_ext_close();

                                                return CAMPAIGN_ERROR_SEXP_EXHAUSTED;
                                        }
                                }
                        }

                        if (optional_string("+Level:")) {
                                stuff_int( &cm->level );
                                if ( cm->level == 0 )  // check if the top (root) of the whole tree
                                        Campaign.next_mission = Campaign.num_missions;

                        } else
                                Campaign.realign_required = 1;

                        if (optional_string("+Position:"))
                                stuff_int( &cm->pos );
                        else
                                Campaign.realign_required = 1;

                        if (Fred_running) {
                                cm->num_goals = -1;
                                cm->num_events = -1;
                                cm->notes = NULL;

                        } else {
                                cm->num_goals = 0;
                                cm->num_events = 0;
                        }

                        cm->goals = NULL;
                        cm->events = NULL;
                        Campaign.num_missions++;
                }
        }

        // set up the other variables for the campaign stuff.  After initializing, we must try and load
        // the campaign save file for this player.  Since all campaign loads go through this routine, I
        // think this place should be the only necessary place to load the campaign save stuff.  The campaign
        // save file will get written when a mission has ended by player choice.
        Campaign.next_mission = 0;
        Campaign.prev_mission = -1;
        Campaign.current_mission = -1;  

        // loading the campaign will get us to the current and next mission that the player must fly
        // plus load all of the old goals that future missions might rely on.
        if (!Fred_running && load_savefile && (Campaign.type == CAMPAIGN_TYPE_SINGLE)) {
                mission_campaign_savefile_load(Campaign.filename);
        }

        // close localization
        lcl_ext_close();

        return 0;
}

// mission_campaign_load_by_name() loads up a freespace campaign given the filename.  This routine
// is used to load up campaigns when a pilot file is loaded.  Generally, the
// filename will probably be the freespace campaign file, but not necessarily.
int mission_campaign_load_by_name( const char *filename )
{
        char real_filename[MAX_FILENAME_LEN+1] = { 0 };
        char name[NAME_LENGTH],test[5];
        int type,max_players;

        // make sure to tack on .fsc on the end if its not there already
        if(strlen(filename) > 0){
                SDL_strlcpy(real_filename, filename, MAX_FILENAME_LEN);

                if(strlen(real_filename) > 4){
                        SDL_strlcpy(test, real_filename+(strlen(real_filename)-4), sizeof(test));
                        if(strcmp(test, FS_CAMPAIGN_FILE_EXT)!=0){
                                SDL_strlcat(real_filename, FS_CAMPAIGN_FILE_EXT, sizeof(real_filename));
                        }
                } else {
                        SDL_strlcat(real_filename, FS_CAMPAIGN_FILE_EXT, sizeof(real_filename));
                }
        } else {
                Error(LOCATION,"Tried to load campaign file with illegal length/extension!");
        }

        if (!mission_campaign_get_info(real_filename, name, &type, &max_players)){
                return -1;      
        }

        Num_campaigns = 0;
        Campaign_file_names[Num_campaigns] = real_filename;
        Campaign_names[Num_campaigns] = name;
        Num_campaigns++;
        mission_campaign_load(real_filename);           
        return 0;
}

int mission_campaign_load_by_name_csfe( const char *filename, const char *callsign )
{
        Game_mode |= GM_NORMAL;
        SDL_strlcpy(Player->callsign, callsign, sizeof(Player->callsign));
        return mission_campaign_load_by_name( filename);
}


// mission_campaign_init initializes some variables then loads the default Freespace single player campaign.
void mission_campaign_init()
{
        memset(&Campaign, 0, sizeof(Campaign) );
}

// Fill in the root of the campaign save filename
void mission_campaign_savefile_generate_root(char *filename, const int max_len)
{
        char base[MAX_FILENAME_LEN];

        SDL_assert ( strlen(Campaign.filename) != 0 );

        // build up the filename for the save file.  There could be a problem with filename length,
        // but this problem can get fixed in several ways -- ignore the problem for now though.
        base_filename(Campaign.filename, base, sizeof(base));
        SDL_assert ( (int)(strlen(base) + strlen(Player->callsign)) < max_len );

        SDL_snprintf( filename, max_len, NOX("%s.%s."), Player->callsign, base );
}

// mission_campaign_savefile_save saves the state of the campaign.  This function will probably always be called
// then the player is done flying a mission in the campaign path.  It will save the missions played, the
// state of the goals, etc.

int mission_campaign_savefile_save()
{
        char filename[MAX_PATH_LEN];
        CFILE *fp;
        int i,j, mission_count;

        memset(filename, 0, sizeof(filename));
        mission_campaign_savefile_generate_root(filename, sizeof(filename));

        // name the file differently depending on whether we're in single player or multiplayer mode
        // single player : *.csg
        SDL_strlcat( filename, NOX("csg"), sizeof(filename) );

        fp = cfopen(filename,"wb", CFILE_NORMAL, CF_TYPE_SINGLE_PLAYERS);

        if (!fp)
                return errno;

        // Write out campaign file info
        cfwrite_int( CAMPAIGN_FILE_ID,fp );
        cfwrite_int( CAMPAIGN_FILE_VERSION,fp );

        // put in the file signature (single or multiplayer campaign) - see MissionCampaign.h for the #defines
        cfwrite_int( CAMPAIGN_SINGLE_PLAYER_SIG, fp );

        // do we need to write out the filename of the campaign?
        cfwrite_string_len( Campaign.filename, fp );
        cfwrite_int( Campaign.prev_mission, fp );
        cfwrite_int( Campaign.next_mission, fp );
        cfwrite_int( Campaign.loop_reentry, fp );
        cfwrite_int( Campaign.loop_enabled, fp );

        // write out the information for ships/weapons which this player is allowed to use
        cfwrite_int(Num_ship_types, fp);
        cfwrite_int(Num_weapon_types, fp);
        for ( i = 0; i < Num_ship_types; i++ ){
                cfwrite_char( Campaign.ships_allowed[i], fp );
        }

        for ( i = 0; i < Num_weapon_types; i++ ){
                cfwrite_char( Campaign.weapons_allowed[i], fp );
        }

        // write out the completed mission matrix.  Used to tell which missions the player
        // can replay in the simulator.  Also, each completed mission contains a list of the goals
        // that were in the mission along with the goal completion status.
        cfwrite_int( Campaign.num_missions_completed, fp );
        for (i = 0; i < MAX_CAMPAIGN_MISSIONS; i++ ) {
                if ( Campaign.missions[i].completed ) {
                        cfwrite_int( i, fp );
                        cfwrite_int( Campaign.missions[i].num_goals, fp );
                        for ( j = 0; j < Campaign.missions[i].num_goals; j++ ) {
                                cfwrite_string_len( Campaign.missions[i].goals[j].name, fp );
                                cfwrite_char( Campaign.missions[i].goals[j].status, fp );
                        }
                        cfwrite_int( Campaign.missions[i].num_events, fp );
                        for ( j = 0; j < Campaign.missions[i].num_events; j++ ) {
                                cfwrite_string_len( Campaign.missions[i].events[j].name, fp );
                                cfwrite_char( Campaign.missions[i].events[j].status, fp );
                        }

                        // write flags
                        cfwrite_int(Campaign.missions[i].flags, fp);
                }
        }

        cfclose( fp );

        // 6/17/98
        // ugh!  due to horrible bug, the stats saved at the end of every level were not written
        // out to disk.  Write out a seperate file to do this.  We will only read it in if we actually
        // find the file.
        memset(filename, 0, sizeof(filename));
        mission_campaign_savefile_generate_root(filename, sizeof(filename));

        // name the file differently depending on whether we're in single player or multiplayer mode
        // single player : *.csg
        SDL_strlcat( filename, NOX("css"), sizeof(filename) );

        fp = cfopen(filename,"wb", CFILE_NORMAL, CF_TYPE_SINGLE_PLAYERS);

        if (!fp)
                return errno;

        // Write out campaign file info
        cfwrite_int( CAMPAIGN_STATS_FILE_ID,fp );
        cfwrite_int( CAMPAIGN_STATS_FILE_VERSION,fp );

        // determine how many missions we are saving -- I think that this method is safer than the method
        // I used for release
        mission_count = 0;
        for ( i = 0; i < Campaign.num_missions; i++ ) {
                if ( Campaign.missions[i].completed ) {
                        mission_count++;
                }
        }

        // write out the stats information to disk.     
        cfwrite_int( mission_count, fp );
        for (i = 0; i < Campaign.num_missions; i++ ) {
                if ( Campaign.missions[i].completed ) {
                        cfwrite_int( i, fp );
                        cfwrite( &Campaign.missions[i].stats, sizeof(scoring_struct), 1, fp );
                }
        }

        cfclose( fp );
        
        return 0;
}

// The following function always only ever ever ever called by CSFE!!!!!
int campaign_savefile_save(const char *pname)
{
        if (Campaign.type == CAMPAIGN_TYPE_SINGLE)
                Game_mode &= ~GM_MULTIPLAYER;
        else
                Game_mode |= GM_MULTIPLAYER;

        SDL_strlcpy(Player->callsign, pname, sizeof(Player->callsign));
        //memcpy(&Campaign, camp, sizeof(campaign));
        return mission_campaign_savefile_save();
}


// the below two functions is internal to this module.  It is here so that I can group the save/load
// functions together.
//

// mission_campaign_savefile_delete deletes any save file in the players directory for the given
// campaign filename
void mission_campaign_savefile_delete( const char *cfilename, int is_multi )
{
        char filename[MAX_PATH_LEN], base[MAX_FILENAME_LEN];

        base_filename(cfilename, base, sizeof(base));

        if ( Player->flags & PLAYER_FLAGS_IS_MULTI ) {
                return; // no such thing as a multiplayer campaign savefile
        }

        SDL_snprintf( filename, sizeof(filename), NOX("%s.%s.csg"), Player->callsign, base );

        cf_delete( filename, CF_TYPE_SINGLE_PLAYERS );
}

void campaign_delete_save( const char *cfn, const char *pname)
{
        SDL_strlcpy(Player->callsign, pname, sizeof(Player->callsign));
        mission_campaign_savefile_delete(cfn);
}

// next function deletes all the save files for this particular pilot.  Just call cfile function
// which will delete multiple files
// Player_select_mode tells us whether we are deleting single or multiplayer files
void mission_campaign_delete_all_savefiles( const char *pilot_name, int is_multi )
{
        int dir_type, num_files, i;
        char *names[MAX_CAMPAIGNS], spec[MAX_FILENAME_LEN + 2];
        const char *ext;
        char filename[1024];
        int (*filter_save)(const char *filename);

        if ( is_multi ) {
                return;                         // can't have multiplayer campaign save files
        }

        ext = NOX(".csg");
        dir_type = CF_TYPE_SINGLE_PLAYERS;

        SDL_snprintf(spec, sizeof(spec), NOX("%s.*%s"), pilot_name, ext);

        // HACK HACK HACK HACK!!!!  cf_get_file_list is not reentrant.  Pretty dumb because it should
        // be.  I have to save any file filters
        filter_save = Get_file_list_filter;
        Get_file_list_filter = NULL;
        num_files = cf_get_file_list(MAX_CAMPAIGNS, names, dir_type, spec);
        Get_file_list_filter = filter_save;

        for (i=0; i<num_files; i++) {
                SDL_strlcpy(filename, names[i], sizeof(filename));
                SDL_strlcat(filename, ext, sizeof(filename));
                cf_delete(filename, dir_type);
                free(names[i]);
        }
}

// mission_campaign_savefile_load takes a filename of a campaign file as a parameter and loads all
// of the information stored in the campaign file.
void mission_campaign_savefile_load( const char *cfilename )
{
        char filename[MAX_PATH_LEN], base[MAX_FILENAME_LEN];
        int version, i, num, j, num_stats_blocks;
        uint id, type_sig;
        CFILE *fp;

        SDL_assert ( strlen(cfilename) != 0 );

        // probably only called from single player games anymore!!! should be anyway
        SDL_assert( Game_mode & GM_NORMAL );            // get allender or DaveB.  trying to save campaign in multiplayer

        // build up the filename for the save file.  There could be a problem with filename length,
        // but this problem can get fixed in several ways -- ignore the problem for now though.
        base_filename(cfilename, base, sizeof(base));
        SDL_assert ( (strlen(base) + strlen(Player->callsign)) < sizeof(filename) );

        if(Game_mode & GM_MULTIPLAYER)
                SDL_snprintf( filename, sizeof(filename), NOX("%s.%s.msg"), Player->callsign, base );
        else
                SDL_snprintf( filename, sizeof(filename), NOX("%s.%s.csg"), Player->callsign, base );

        fp = cfopen(filename, "rb", CFILE_NORMAL, CF_TYPE_SINGLE_PLAYERS );
        if ( !fp )
                return;

        id = cfread_int( fp );
        if ( id != CAMPAIGN_FILE_ID ) {
                Warning(LOCATION, "Campaign save file has invalid signature");
                cfclose( fp );
                return;
        }

        version = cfread_int( fp );
        if ( version < CAMPAIGN_FILE_COMPATIBLE_VERSION ) {
                Warning(LOCATION, "Campaign save file too old -- not compatible.  Deleting file.\nYou can continue from here without trouble\n\n");
                cfclose( fp );
                cf_delete( filename, CF_TYPE_SINGLE_PLAYERS );
                return;
        }

        // verify that we are loading the correct type of campaign file for the mode that we are in.
        if(version >= 3)
                type_sig = cfread_int( fp );
        else
                type_sig = CAMPAIGN_SINGLE_PLAYER_SIG;
        // the actual check
        SDL_assert( ((Game_mode & GM_MULTIPLAYER) && (type_sig==CAMPAIGN_MULTI_PLAYER_SIG)) || (!(Game_mode & GM_MULTIPLAYER) && (type_sig==CAMPAIGN_SINGLE_PLAYER_SIG)) );

        Campaign.type = type_sig == CAMPAIGN_SINGLE_PLAYER_SIG ? CAMPAIGN_TYPE_SINGLE : CAMPAIGN_TYPE_MULTI_COOP;

        // read in the filename of the campaign and compare the filenames to be sure that
        // we are reading data that really belongs to this campaign.  I think that this check
        // is redundant.
        cfread_string_len( filename, sizeof(filename), fp );
        /*if ( SDL_strcasecmp( filename, cfilename) ) { //      Used to be !SDL_strcasecmp.  How did this ever work? --MK, 11/9/97
                Warning(LOCATION, "Campaign save file appears corrupt because of mismatching filenames.");
                cfclose(fp);
                return;
        }*/

        Campaign.prev_mission = cfread_int( fp );
        Campaign.next_mission = cfread_int( fp );
        Campaign.loop_reentry = cfread_int( fp );
        Campaign.loop_enabled = cfread_int( fp );

        //  load information about ships/weapons allowed        
        int ship_count, weapon_count;

        // if earlier than mission disk version, use old MAX_SHIP_TYPES, otherwise read from the file           
        if(version <= CAMPAIGN_INITIAL_RELEASE_FILE_VERSION){
                ship_count = CAMPAIGN_SAVEFILE_MAX_SHIPS_OLD;
                weapon_count = CAMPAIGN_SAVEFILE_MAX_WEAPONS_OLD;
        } else {
                ship_count = cfread_int(fp);
                weapon_count = cfread_int(fp);
        }

        for ( i = 0; i < ship_count; i++ ){
                Campaign.ships_allowed[i] = cfread_ubyte( fp );
        }

        for ( i = 0; i < weapon_count; i++ ){
                Campaign.weapons_allowed[i] = cfread_ubyte( fp );
        }       

        // read in the completed mission matrix.  Used to tell which missions the player
        // can replay in the simulator.  Also, each completed mission contains a list of the goals
        // that were in the mission along with the goal completion status.
        Campaign.num_missions_completed = cfread_int( fp );
        for (i = 0; i < Campaign.num_missions_completed; i++ ) {
                num = cfread_int( fp );
                Campaign.missions[num].completed = 1;
                Campaign.missions[num].num_goals = cfread_int( fp );
                
                // be sure to malloc out space for the goals stuff, then zero the memory!!!  Don't do malloc
                // if there are no goals
                Campaign.missions[num].goals = (mgoal *)malloc( Campaign.missions[num].num_goals * sizeof(mgoal) );
                if ( Campaign.missions[num].num_goals > 0 ) {
                        memset( Campaign.missions[num].goals, 0, sizeof(mgoal) * Campaign.missions[num].num_goals );
                        SDL_assert( Campaign.missions[num].goals != NULL );
                }

                // now read in the goal information for this mission
                for ( j = 0; j < Campaign.missions[num].num_goals; j++ ) {
                        cfread_string_len( Campaign.missions[num].goals[j].name, NAME_LENGTH, fp );
                        Campaign.missions[num].goals[j].status = cfread_char( fp );
                }

                // get the events from the savefile
                Campaign.missions[num].num_events = cfread_int( fp );
                
                // be sure to malloc out space for the events stuff, then zero the memory!!!  Don't do malloc
                // if there are no events
//              if (Campaign.missions[num].events < 0)
//                      Campaign.missions[num].events = 0;
                Campaign.missions[num].events = (mevent *)malloc( Campaign.missions[num].num_events * sizeof(mevent) );
                if ( Campaign.missions[num].num_events > 0 ) {
                        memset( Campaign.missions[num].events, 0, sizeof(mevent) * Campaign.missions[num].num_events );
                        SDL_assert( Campaign.missions[num].events != NULL );
                }
                
                // now read in the event information for this mission
                for ( j = 0; j < Campaign.missions[num].num_events; j++ ) {
                        cfread_string_len( Campaign.missions[num].events[j].name, NAME_LENGTH, fp );
                        Campaign.missions[num].events[j].status = cfread_char( fp );
                }

                // now read flags
                Campaign.missions[num].flags = cfread_int(fp);
        }       

        cfclose( fp );

        // 4/17/98
        // now, try and read in the campaign stats saved information.  This code was added for the 1.03 patch
        // since the stats data was never written out to disk.  We try and open the file, and if we cannot find
        // it, then simply return
        SDL_snprintf( filename, sizeof(filename), NOX("%s.%s.css"), Player->callsign, base );

        fp = cfopen(filename, "rb", CFILE_NORMAL, CF_TYPE_SINGLE_PLAYERS );
        if ( !fp )
                return;

        id = cfread_int( fp );
        if ( id != CAMPAIGN_STATS_FILE_ID ) {
                Warning(LOCATION, "Campaign stats save file has invalid signature");
                cfclose( fp );
                return;
        }

        version = cfread_int( fp );
        if ( version < CAMPAIGN_STATS_FILE_COMPATIBLE_VERSION ) {
                Warning(LOCATION, "Campaign save file too old -- not compatible.  Deleting file.\nYou can continue from here without trouble\n\n");
                cfclose( fp );
                cf_delete( filename, CF_TYPE_SINGLE_PLAYERS );
                return;
        }

        num_stats_blocks = cfread_int( fp );
        for (i = 0; i < num_stats_blocks; i++ ) {
                num = cfread_int( fp );
                cfread( &Campaign.missions[num].stats, sizeof(scoring_struct), 1, fp );
        }

        cfclose(fp);
}

// the following code only ever called by CSFE!!!!
void campaign_savefile_load(const char *fname, const char *pname)
{
        if (Campaign.type==CAMPAIGN_TYPE_SINGLE) {
                Game_mode &= ~GM_MULTIPLAYER;
                Game_mode &= GM_NORMAL;
        }
        else
                Game_mode |= GM_MULTIPLAYER;
        SDL_strlcpy(Player->callsign, pname, sizeof(Player->callsign));
        mission_campaign_savefile_load(fname);
}

// mission_campaign_next_mission sets up the internal veriables of the campaign
// structure so the player can play the next mission.  If there are no more missions
// available in the campaign, this function returns -1, else 0 if the mission was
// set successfully
int mission_campaign_next_mission()
{
        if ( (Campaign.next_mission == -1) || (strlen(Campaign.name) == 0) ) // will be set to -1 when there is no next mission
                return -1;

        Campaign.current_mission = Campaign.next_mission;       
        SDL_strlcpy( Game_current_mission_filename, Campaign.missions[Campaign.current_mission].name, MAX_FILENAME_LEN );

        // check for end of loop.
        if (Campaign.current_mission == Campaign.loop_reentry) {
                Campaign.loop_enabled = 0;
        }

        // reset the number of persistent ships and weapons for the next campaign mission
        Num_granted_ships = 0;
        Num_granted_weapons = 0;
        return 0;
}

// mission_campaign_previous_mission() gets called to go to the previous mission in
// the campaign.  Used only for Red Alert missions
int mission_campaign_previous_mission()
{
        if ( !(Game_mode & GM_CAMPAIGN_MODE) )
                return 0;

        if ( Campaign.prev_mission == -1 )
                return 0;

        Campaign.current_mission = Campaign.prev_mission;
        Campaign.next_mission = Campaign.current_mission;
        Campaign.num_missions_completed--;
        Campaign.missions[Campaign.next_mission].completed = 0;
        mission_campaign_savefile_save();

        // reset the player stats to be the stats from this level
        memcpy( &Player->stats, &Campaign.missions[Campaign.current_mission].stats, sizeof(Player->stats) );

        SDL_strlcpy( Game_current_mission_filename, Campaign.missions[Campaign.current_mission].name, MAX_FILENAME_LEN );
        Num_granted_ships = 0;
        Num_granted_weapons = 0;

        return 1;
}

/*
// determine what the next mission is after the current one.  Because this evaluates an sexp,
// and that could check just about anything, the results are only going to be valid in
// certain places.
// DA 12/09/98 -- To allow for mission loops, need to maintain call with store stats
int mission_campaign_eval_next_mission( int store_stats )
{
        char *name;
        int cur, i;
        cmission *mission;

        Campaign.next_mission = -1;
        cur = Campaign.current_mission;
        name = Campaign.missions[cur].name;

        mission = &Campaign.missions[cur];

        // first we must save the status of the current missions goals in the campaign mission structure.
        // After that, we can determine which mission is tagged as the next mission.  Finally, we
        // can save the campaign save file
        // we might have goal and event status if the player replayed a mission
        if ( mission->num_goals > 0 ) {
                free( mission->goals );
        }

        mission->num_goals = Num_goals;
        if ( mission->num_goals > 0 ) {
                mission->goals = (mgoal *)malloc( sizeof(mgoal) * Num_goals );
                SDL_assert( mission->goals != NULL );
        }

        // copy the needed info from the Mission_goal struct to our internal structure
        for (i = 0; i < Num_goals; i++ ) {
                if ( strlen(Mission_goals[i].name) == 0 ) {
                        char name[NAME_LENGTH];

                        sprintf(name, NOX("Goal #%d"), i);
                        //Warning(LOCATION, "Mission goal in mission %s must have a +Name field! using %s for campaign save file\n", mission->name, name);
                        strcpy( mission->goals[i].name, name);
                } else
                        strcpy( mission->goals[i].name, Mission_goals[i].name );
                SDL_assert ( Mission_goals[i].satisfied != GOAL_INCOMPLETE );           // should be true or false at this point!!!
                mission->goals[i].status = (char)Mission_goals[i].satisfied;
        }

        // do the same thing for events as we did for goals
        // we might have goal and event status if the player replayed a mission
        if ( mission->num_events > 0 ) {
                free( mission->events );
        }

        mission->num_events = Num_mission_events;
        if ( mission->num_events > 0 ) {
                mission->events = (mevent *)malloc( sizeof(mevent) * Num_mission_events );
                SDL_assert( mission->events != NULL );
        }

        // copy the needed info from the Mission_goal struct to our internal structure
        for (i = 0; i < Num_mission_events; i++ ) {
                if ( strlen(Mission_events[i].name) == 0 ) {
                        char name[NAME_LENGTH];

                        sprintf(name, NOX("Event #%d"), i);
                        nprintf(("Warning", "Mission goal in mission %s must have a +Name field! using %s for campaign save file\n", mission->name, name));
                        strcpy( mission->events[i].name, name);
                } else
                        strcpy( mission->events[i].name, Mission_events[i].name );

                // getting status for the events is a little different.  If the formula value for the event entry
                // is -1, then we know the value of the result field will never change.  If the formula is
                // not -1 (i.e. still being evaluated at mission end time), we will write "incomplete" for the
                // event evaluation
                if ( Mission_events[i].formula == -1 ) {
                        if ( Mission_events[i].result )
                                mission->events[i].status = EVENT_SATISFIED;
                        else
                                mission->events[i].status = EVENT_FAILED;
                } else
                        Int3();
        }

        // maybe store the alltime stats which would be current at the end of this mission
        if ( store_stats ) {
                memcpy( &mission->stats, &Player->stats, sizeof(Player->stats) );
                scoring_backout_accept( &mission->stats );
        }

        if ( store_stats ) {    // second (last) time through, so use choose loop_mission if chosen
                if ( Campaign.loop_enabled ) {
                        Campaign.next_mission = Campaign.loop_mission;
                } else {
                        // evaluate next mission (straight path)
                        if (Campaign.missions[cur].formula != -1) {
                                flush_sexp_tree(Campaign.missions[cur].formula);  // force formula to be re-evaluated
                                eval_sexp(Campaign.missions[cur].formula);  // this should reset Campaign.next_mission to proper value
                        }
                }
        } else {

                // evaluate next mission (straight path)
                if (Campaign.missions[cur].formula != -1) {
                        flush_sexp_tree(Campaign.missions[cur].formula);  // force formula to be re-evaluated
                        eval_sexp(Campaign.missions[cur].formula);  // this should reset Campaign.next_mission to proper value
                }

                // evaluate mission loop mission (if any) so it can be used if chosen
                if ( Campaign.missions[cur].has_mission_loop ) {
                        int copy_next_mission = Campaign.next_mission;
                        // Set temporarily to -1 so we know if loop formula fails to assign
                        Campaign.next_mission = -1;  // Cannot exit campaign from loop
                        if (Campaign.missions[cur].mission_loop_formula != -1) {
                                flush_sexp_tree(Campaign.missions[cur].mission_loop_formula);  // force formula to be re-evaluated
                                eval_sexp(Campaign.missions[cur].mission_loop_formula);  // this should reset Campaign.next_mission to proper value
                        }

                        Campaign.loop_mission = Campaign.next_mission;
                        Campaign.next_mission = copy_next_mission;
                }
        }

        if (Campaign.next_mission == -1)
                nprintf(("allender", "No next mission to proceed to.\n"));
        else
                nprintf(("allender", "Next mission is number %d [%s]\n", Campaign.next_mission, Campaign.missions[Campaign.next_mission].name));

        return Campaign.next_mission;
} */

// Evaluate next campaign mission - set as Campaign.next_mission.  Also set Campaign.loop_mission
void mission_campaign_eval_next_mission()
{
        Campaign.next_mission = -1;
        int cur = Campaign.current_mission;

        // evaluate next mission (straight path)
        if (Campaign.missions[cur].formula != -1) {
                flush_sexp_tree(Campaign.missions[cur].formula);  // force formula to be re-evaluated
                eval_sexp(Campaign.missions[cur].formula);  // this should reset Campaign.next_mission to proper value
        }

        // evaluate mission loop mission (if any) so it can be used if chosen
        if ( Campaign.missions[cur].has_mission_loop ) {
                int copy_next_mission = Campaign.next_mission;
                // Set temporarily to -1 so we know if loop formula fails to assign
                Campaign.next_mission = -1;
                if (Campaign.missions[cur].mission_loop_formula != -1) {
                        flush_sexp_tree(Campaign.missions[cur].mission_loop_formula);  // force formula to be re-evaluated
                        eval_sexp(Campaign.missions[cur].mission_loop_formula);  // this should reset Campaign.next_mission to proper value
                }

                Campaign.loop_mission = Campaign.next_mission;
                Campaign.next_mission = copy_next_mission;
        }

        if (Campaign.next_mission == -1) {
                nprintf(("allender", "No next mission to proceed to.\n"));
        } else {
                nprintf(("allender", "Next mission is number %d [%s]\n", Campaign.next_mission, Campaign.missions[Campaign.next_mission].name));
        }

}

// Store mission's goals and events in Campaign struct
void mission_campaign_store_goals_and_events()
{
        int cur, i;
        cmission *mission;

        cur = Campaign.current_mission;

        mission = &Campaign.missions[cur];

        // first we must save the status of the current missions goals in the campaign mission structure.
        // After that, we can determine which mission is tagged as the next mission.  Finally, we
        // can save the campaign save file
        // we might have goal and event status if the player replayed a mission
        if ( mission->num_goals > 0 ) {
                free( mission->goals );
        }

        mission->num_goals = Num_goals;
        if ( mission->num_goals > 0 ) {
                mission->goals = (mgoal *)malloc( sizeof(mgoal) * Num_goals );
                SDL_assert( mission->goals != NULL );
        }

        // copy the needed info from the Mission_goal struct to our internal structure
        for (i = 0; i < Num_goals; i++ ) {
                if ( strlen(Mission_goals[i].name) == 0 ) {
                        char name[NAME_LENGTH];

                        SDL_snprintf(name, sizeof(name), NOX("Goal #%d"), i);
                        //Warning(LOCATION, "Mission goal in mission %s must have a +Name field! using %s for campaign save file\n", mission->name, name);
                        SDL_strlcpy( mission->goals[i].name, name, sizeof(mission->goals[0].name));
                } else
                        SDL_strlcpy( mission->goals[i].name, Mission_goals[i].name, sizeof(mission->goals[0].name) );
                SDL_assert ( Mission_goals[i].satisfied != GOAL_INCOMPLETE );           // should be true or false at this point!!!
                mission->goals[i].status = (char)Mission_goals[i].satisfied;
        }

        // do the same thing for events as we did for goals
        // we might have goal and event status if the player replayed a mission
        if ( mission->num_events > 0 ) {
                free( mission->events );
        }

        mission->num_events = Num_mission_events;
        if ( mission->num_events > 0 ) {
                mission->events = (mevent *)malloc( sizeof(mevent) * Num_mission_events );
                SDL_assert( mission->events != NULL );
        }

        // copy the needed info from the Mission_goal struct to our internal structure
        for (i = 0; i < Num_mission_events; i++ ) {
                if ( strlen(Mission_events[i].name) == 0 ) {
                        char name[NAME_LENGTH];

                        SDL_snprintf(name, sizeof(name), NOX("Event #%d"), i);
                        nprintf(("Warning", "Mission goal in mission %s must have a +Name field! using %s for campaign save file\n", mission->name, name));
                        SDL_strlcpy( mission->events[i].name, name, sizeof(mission->events[0].name));
                } else
                        SDL_strlcpy( mission->events[i].name, Mission_events[i].name, sizeof(mission->events[0].name) );

                // getting status for the events is a little different.  If the formula value for the event entry
                // is -1, then we know the value of the result field will never change.  If the formula is
                // not -1 (i.e. still being evaluated at mission end time), we will write "incomplete" for the
                // event evaluation
                if ( Mission_events[i].formula == -1 ) {
                        if ( Mission_events[i].result )
                                mission->events[i].status = EVENT_SATISFIED;
                        else
                                mission->events[i].status = EVENT_FAILED;
                } else
                        Int3();
        }
}

// this function is called when the player's mission is over.  It updates the internal store of goals
// and their status then saves the state of the campaign in the campaign file.  This gets called
// after player accepts mission results in debriefing.
void mission_campaign_mission_over()
{
        int mission_num, i;
        cmission *mission;

        // I don't think that we should have a record for these -- maybe we might??????  If we do,
        // then we should free them
        if ( !(Game_mode & GM_CAMPAIGN_MODE) ){
                return;
        }

        mission_num = Campaign.current_mission;
        SDL_assert( mission_num != -1 );
        mission = &Campaign.missions[mission_num];

        // determine if any ships/weapons were granted this mission
        for ( i=0; i<Num_granted_ships; i++ ){
                Campaign.ships_allowed[Granted_ships[i]] = 1;
        }

        for ( i=0; i<Num_granted_weapons; i++ ){
                Campaign.weapons_allowed[Granted_weapons[i]] = 1;       
        }

        // DKA 12/11/98 - Unneeded already evaluated and stored
        // determine what new mission we are moving to.
        //      mission_campaign_eval_next_mission(1);

        // update campaign.mission stats (used to allow backout inRedAlert)
        memcpy( &mission->stats, &Player->stats, sizeof(Player->stats) );
        if(!(Game_mode & GM_MULTIPLAYER)){
                scoring_backout_accept( &mission->stats );
        }

        // if we are moving to a new mission, then change our data.  If we are staying on the same mission,
        // then we don't want to do anything.  Remove information about goals/events
        if ( Campaign.next_mission != mission_num ) {
                Campaign.prev_mission = mission_num;
                Campaign.current_mission = -1;
                Campaign.num_missions_completed++;
                Campaign.missions[mission_num].completed = 1;

                // save the scoring values from the previous mission at the start of this mission -- for red alert

                // save the state of the campaign in the campaign save file and move to the end_game state
                if (Campaign.type == CAMPAIGN_TYPE_SINGLE) {
                        mission_campaign_savefile_save();
                }

        } else {
                // free up the goals and events which were just malloced.  It's kind of like erasing any fact
                // that the player played this mission in the campaign.
                free( mission->goals );
                mission->num_goals = 0;

                free( mission->events );
                mission->num_events = 0;

                Sexp_nodes[mission->formula].value = SEXP_UNKNOWN;
        }

        SDL_assert(Player);
        if (Campaign.missions[Campaign.next_mission].flags & CMISSION_FLAG_BASTION){
                Player->on_bastion = 1;
        } else {
                Player->on_bastion = 0;
        }

        mission_campaign_next_mission();                        // sets up whatever needs to be set to actually play next mission
}

// called when the game closes -- to get rid of memory errors for Bounds checker
void mission_campaign_close()
{
        int i;

        if (Campaign.desc)
                free(Campaign.desc);

        // be sure to remove all old malloced strings of Mission_names
        // we must also free any goal stuff that was from a previous campaign
        for ( i=0; i<Campaign.num_missions; i++ ) {
                if ( Campaign.missions[i].name ){
                        free(Campaign.missions[i].name);
                }

                if (Campaign.missions[i].notes){
                        free(Campaign.missions[i].notes);
                }

                if ( Campaign.missions[i].num_goals > 0 ){
                        free ( Campaign.missions[i].goals );
                }

                if ( Campaign.missions[i].num_events > 0 ){
                        free ( Campaign.missions[i].events );
                }

                // the next three are strdup'd return values from parselo.cpp
                if (Campaign.missions[i].mission_loop_desc) {
                        free(Campaign.missions[i].mission_loop_desc);
                }

                if (Campaign.missions[i].mission_loop_brief_anim) {
                        free(Campaign.missions[i].mission_loop_brief_anim);
                }

                if (Campaign.missions[i].mission_loop_brief_sound) {
                        free(Campaign.missions[i].mission_loop_brief_sound);
                }

                if ( !Fred_running ){
                        sexp_unmark_persistent(Campaign.missions[i].formula);           // free any sexpression nodes used by campaign.
                }

                Campaign.missions[i].num_goals = 0;
                Campaign.missions[i].num_events = 0;
        }
}

// call from game_shutdown() ONLY!!!
void mission_campaign_shutdown()
{
        int i;
        
        for (i=0; i<MAX_CAMPAIGNS; i++) {
                if (Campaign_names[i] != NULL) {
                        free(Campaign_names[i]);
                        Campaign_names[i] = NULL;
                }

                if (Campaign_file_names[i] != NULL) {
                        free(Campaign_file_names[i]);
                        Campaign_file_names[i] = NULL;
                }
        }
}

// extract the mission filenames for a campaign.  
//
// filename     =>      name of campaign file
//      dest            => storage for the mission filename, must be already allocated
// num          => output parameter for the number of mission filenames in the campaign
//
// note that dest should allocate at least dest[MAX_CAMPAIGN_MISSIONS][NAME_LENGTH]
int mission_campaign_get_filenames(const char *filename, char dest[][NAME_LENGTH], int *num)
{
        int     rval;

        // read the mission file and get the list of mission filenames
        if ((rval = setjmp(parse_abort)) != 0) {
                return rval;

        } else {
                read_file_text(filename);
                SDL_assert(strlen(filename) < MAX_FILENAME_LEN - 1);  // make sure no overflow

                reset_parse();
                required_string("$Name:");
                advance_to_eoln(NULL);

                required_string( "$Type:" );
                advance_to_eoln(NULL);

                // parse the mission file and actually read in the mission stuff
                *num = 0;
                while ( skip_to_string("$Mission:") == 1 ) {
                        stuff_string(dest[*num], F_NAME, NULL);
                        (*num)++;
                }
        }

        return 0;
}

// function to read the goals and events from a mission in a campaign file and store that information
// in the campaign structure for use in the campaign editor, error checking, etc
void read_mission_goal_list(int num)
{
        char *filename, notes[NOTES_LENGTH], goals[MAX_GOALS][NAME_LENGTH];
        char events[MAX_MISSION_EVENTS][NAME_LENGTH];
        int i, z, r, event_count, count = 0;

        filename = Campaign.missions[num].name;
        if ((r = setjmp(parse_abort))>0) {
                Warning(LOCATION, "Error reading \"%s\" (code = %d)", filename, r);
                return;
        }

        // open localization
        lcl_ext_open(); 
        
        read_file_text(filename);
        init_parse();

        // first, read the mission notes for this mission.  Used in campaign editor
        if (skip_to_string("#Mission Info")) {
                if (skip_to_string("$Notes:")) {
                        stuff_string(notes, F_NOTES, NULL);
                        if (Campaign.missions[num].notes){
                                free(Campaign.missions[num].notes);
                        }

                        Campaign.missions[num].notes = (char *) malloc(strlen(notes) + 1);
                        SDL_strlcpy(Campaign.missions[num].notes, notes, strlen(notes) + 1);
                }
        }

        event_count = 0;
        // skip to events section in the mission file.  Events come before goals, so we process them first
        if ( skip_to_string("#Events") ) {
                while (1) {
                        if (skip_to_string("$Formula:", "#Goals") != 1){
                                break;
                        }

                        z = skip_to_string("+Name:", "$Formula:");
                        if (!z){
                                break;
                        }

                        if (z == 1){
                                stuff_string(events[event_count], F_NAME, NULL);
                        } else {
                                SDL_snprintf(events[event_count], NAME_LENGTH, NOX("Event #%d"), event_count + 1);
                        }

                        event_count++;
                        SDL_assert(event_count < MAX_MISSION_EVENTS);
                }
        }

        count = 0;
        if (skip_to_string("#Goals")) {
                while (1) {
                        if (skip_to_string("$Type:", "#End") != 1){
                                break;
                        }

                        z = skip_to_string("+Name:", "$Type:");
                        if (!z){
                                break;
                        }

                        if (z == 1){
                                stuff_string(goals[count], F_NAME, NULL);
                        } else {
                                SDL_snprintf(goals[count], NAME_LENGTH, NOX("Goal #%d"), count + 1);
                        }

                        count++;
                        SDL_assert(count < MAX_GOALS);
                }
        }

        Campaign.missions[num].num_goals = count;
        if (count) {
                Campaign.missions[num].goals = (mgoal *) malloc(count * sizeof(mgoal));
                SDL_assert(Campaign.missions[num].goals);  // make sure we got the memory
                memset(Campaign.missions[num].goals, 0, count * sizeof(mgoal));

                for (i=0; i<count; i++){
                        SDL_strlcpy(Campaign.missions[num].goals[i].name, goals[i], sizeof(Campaign.missions[num].goals[i].name));
                }
        }
                // copy the events
        Campaign.missions[num].num_events = event_count;
        if (event_count) {
                Campaign.missions[num].events = (mevent *)malloc(event_count * sizeof(mevent));
                SDL_assert ( Campaign.missions[num].events );
                memset(Campaign.missions[num].events, 0, event_count * sizeof(mevent));

                for (i = 0; i < event_count; i++ ){
                        SDL_strlcpy(Campaign.missions[num].events[i].name, events[i], sizeof(Campaign.missions[num].events[i].name));
                }
        }

        // close localization
        lcl_ext_close();
}

// function to return index into Campaign's list of missions of the mission with the given
// filename.  This function tried to be a little smart about filename looking for the .fsm
// extension since filenames are stored with the extension in the campaign file.  Returns
// index of mission in campaign structure.  -1 if mission name not found.
int mission_campaign_find_mission( const char *name )
{
        int i;
        char realname[MAX_FILENAME_LEN];

        // look for an extension on the file.  If no extension, add default ".fsm" onto the
        // end of the filename
        if ( SDL_strchr(name, '.') == NULL ){
                SDL_snprintf(realname, sizeof(realname), NOX("%s%s"), name, FS_MISSION_FILE_EXT );
        } else {
                SDL_strlcpy(realname, name, sizeof(realname));
        }

        for (i = 0; i < Campaign.num_missions; i++ ) {
                if ( !SDL_strcasecmp(realname, Campaign.missions[i].name) ){
                        return i;
                }
        }

        return -1;
}

void mission_campaign_maybe_play_movie(int type)
{
        int mission;
        char *filename;

        // only support pre mission movies for now.
        SDL_assert ( type == CAMPAIGN_MOVIE_PRE_MISSION );

        if ( !(Game_mode & GM_CAMPAIGN_MODE) )
                return;

        mission = Campaign.current_mission;
        SDL_assert( mission != -1 );

        // get a possible filename for a movie to play.
        filename = NULL;
        switch( type ) {
        case CAMPAIGN_MOVIE_PRE_MISSION:
                if ( strlen(Campaign.missions[mission].briefing_cutscene) )
                        filename = Campaign.missions[mission].briefing_cutscene;
                break;

        default:
                Int3();
                break;
        }

        // no filename, no movie!
        if ( !filename )
                return;

        movie_play( filename );
}

// return nonzero if the passed filename is a multiplayer campaign, 0 otherwise
int mission_campaign_parse_is_multi(const char *filename, char *name, const int max_len)
{       
        int i;
        char temp[50];
        
        read_file_text( filename );
        reset_parse();
        
        required_string("$Name:");
        stuff_string( temp, F_NAME, NULL );     
        if ( name )
                SDL_strlcpy( name, temp, max_len );

        required_string( "$Type:" );
        stuff_string( temp, F_NAME, NULL );

        for (i = 0; i < MAX_CAMPAIGN_TYPES; i++ ) {
                if ( !SDL_strcasecmp(temp, campaign_types[i]) ) {
                        return i;
                }
        }

        Error(LOCATION, "Unknown campaign type %s", temp );
        return -1;
}

// functions to save persistent information during a mission -- which then might or might not get
// saved out when the mission is over depending on whether player replays mission or commits.
void mission_campaign_save_persistent( int type, int sindex )
{
        // based on the type of information, save it off for possible saving into the campsign
        // savefile when the mission is over
        if ( type == CAMPAIGN_PERSISTENT_SHIP ) {
                SDL_assert( Num_granted_ships < MAX_SHIP_TYPES );
                Granted_ships[Num_granted_ships] = sindex;
                Num_granted_ships++;
        } else if ( type == CAMPAIGN_PERSISTENT_WEAPON ) {
                SDL_assert( Num_granted_weapons < MAX_WEAPON_TYPES );
                Granted_weapons[Num_granted_weapons] = sindex;
                Num_granted_weapons++;
        } else
                Int3();
}

// returns 0: loaded, !0: error
int mission_load_up_campaign()
{
        if (strlen(Player->current_campaign))
                return mission_campaign_load(Player->current_campaign);
        else
                return mission_campaign_load(BUILTIN_CAMPAIGN);
}

// for end of campaign in the single player game.  Called when the end of campaign state is
// entered, which is triggered when the end-campaign sexpression is hit

void mission_campaign_end_init()
{
        // no need to do any initialization.
}

void mission_campaign_end_do()
{
        // play the movies
        event_music_level_close();
        mission_goal_fail_incomplete();
        scoring_level_close();
        mission_campaign_mission_over();

#ifdef MAKE_FS1
        movie_play("endgame.mve");
#else
        // eventually we'll want to play one of two options (good ending or bad ending)
        // did the supernova blow?
        if(Supernova_status == SUPERNOVA_HIT){
                movie_play_two("endpart1.mve", "endprt2b.mve");                 // good ending
        } else {
                movie_play_two("endpart1.mve", "endprt2a.mve");                 // good ending
        }
#endif

#if defined(FS2_DEMO) || defined(FS1_DEMO)
        gameseq_post_event( GS_EVENT_END_DEMO );
#elif defined(MAKE_FS1)
        gameseq_post_event( GS_STATE_END_OF_CAMPAIGN );
#else
        gameseq_post_event( GS_EVENT_MAIN_MENU );
#endif
}

void mission_campaign_end_close()
{
        // nothing to do here.
}


// skip to the next mission in the campaign
// this also posts the state change by default.  pass 0 to override that
void mission_campaign_skip_to_next(int start_game)
{
        // mark all goals/events complete
        // these do not really matter, since is-previous-event-* and is-previous-goal-* sexps check
        // to see if the mission was skipped, and use defaults accordingly.
        mission_goal_mark_objectives_complete();
        mission_goal_mark_events_complete();

        // mark mission as skipped
        Campaign.missions[Campaign.current_mission].flags |= CMISSION_FLAG_SKIPPED;

        // store
        mission_campaign_store_goals_and_events();

        // now set the next mission
        mission_campaign_eval_next_mission();

        // clear out relevant player vars
        Player->failures_this_session = 0;
        Player->show_skip_popup = 1;

        if (start_game) {
                // proceed to next mission or main hall
                if ((Campaign.missions[Campaign.current_mission].has_mission_loop) && (Campaign.loop_mission != -1)) {
                        // go to loop solicitation
                        gameseq_post_event(GS_EVENT_LOOP_BRIEF);
                } else {
                        // closes out mission stuff, sets up next one
                        mission_campaign_mission_over();

                        if ( Campaign.next_mission == -1 ) {
                                // go to main hall, tha campaign is over!
                                gameseq_post_event(GS_EVENT_MAIN_MENU);
                        } else {
                                // go to next mission
                                gameseq_post_event(GS_EVENT_START_GAME);
                        }
                }
        }
}


// breaks your ass out of the loop
// this also posts the state change
void mission_campaign_exit_loop()
{
        // set campaign to loop reentry point
        Campaign.next_mission = Campaign.loop_reentry;
        Campaign.current_mission = -1;
        Campaign.loop_enabled = 0;

        // set things up for next mission
        mission_campaign_next_mission();
        gameseq_post_event(GS_EVENT_START_GAME);
}


// used for jumping to a particular campaign mission
// all pvs missions marked skipped
// this relies on correct mission ordering in the campaign file
void mission_campaign_jump_to_mission(const char *name)
{
        int i = 0;
        char dest_name[64] = { 0 };

        // load in the campaign junk
        mission_load_up_campaign();

        // tack the .fs2 onto the input name
        SDL_strlcpy(dest_name, cf_add_ext(name, FS_MISSION_FILE_EXT), sizeof(dest_name));

        // search for our mission
        for (i=0; i<Campaign.num_missions; i++) {
                if ((Campaign.missions[i].name != NULL) && !SDL_strcasecmp(Campaign.missions[i].name, dest_name) ) {
                        Campaign.next_mission = i;
                        Campaign.prev_mission = i-1;
                        mission_campaign_next_mission();
                        Game_mode |= GM_CAMPAIGN_MODE;
                        gameseq_post_event(GS_EVENT_START_GAME);
                        return;
                } else {
                        Campaign.missions[i].flags |= CMISSION_FLAG_SKIPPED;
                        Campaign.num_missions_completed = i;
                }
        }

        // if we got here, no match was found
        // restart the campaign
        mission_campaign_savefile_delete(Campaign.filename);
        mission_campaign_load(Campaign.filename);
}