/***************************************************************************
 *  Original Diku Mud copyright (C) 1990, 1991 by Sebastian Hammer,        *
 *  Michael Seifert, Hans Henrik St{rfeldt, Tom Madsen, and Katja Nyboe.   *
 *                                                                         *
 *  Merc Diku Mud improvments copyright (C) 1992, 1993 by Michael          *
 *  Chastain, Michael Quan, and Mitchell Tse.                              *
 *                                                                         *
 *  Envy Diku Mud improvements copyright (C) 1994 by Michael Quan, David   *
 *  Love, Guilherme 'Willie' Arnold, and Mitchell Tse.                     *
 *                                                                         *
 *  In order to use any part of this Envy Diku Mud, you must comply with   *
 *  the original Diku license in 'license.doc', the Merc license in        *
 *  'license.txt', as well as the Envy license in 'license.nvy'.           *
 *  In particular, you may not remove either of these copyright notices.   *
 *                                                                         *
 *  Much time and thought has gone into this software and you are          *
 *  benefitting.  We hope that you share your changes too.  What goes      *
 *  around, comes around.                                                  *
 ***************************************************************************/

#if defined( macintosh )
#include <types.h>
#else
#include <sys/types.h>
#endif
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include "merc.h"

#if !defined( macintosh )
extern  int     _filbuf	        args( (FILE *) );
#endif

#if !defined( ultrix )
#include <memory.h>
#endif

/*
 * Globals.
 */
HELP_DATA *		help_first;
HELP_DATA *		help_last;

SHOP_DATA *		shop_first;
SHOP_DATA *		shop_last;

CHAR_DATA *		char_free;
EXTRA_DESCR_DATA *	extra_descr_free;
NOTE_DATA *		note_free;
OBJ_DATA *		obj_free;
PC_DATA *		pcdata_free;

char                    bug_buf                 [ MAX_INPUT_LENGTH*2 ];
CHAR_DATA *		char_list;
char *			help_greeting;
char	                log_buf                 [ MAX_INPUT_LENGTH*2 ];
KILL_DATA	        kill_table              [ MAX_LEVEL          ];
NOTE_DATA *		note_list;
OBJ_DATA *		object_list;
TIME_INFO_DATA		time_info;
WEATHER_DATA		weather_info;
char *                  down_time;
char *                  warning1;
char *                  warning2;

int			gsn_backstab;
int			gsn_dodge;
int			gsn_hide;
int			gsn_peek;
int			gsn_pick_lock;
int			gsn_sneak;
int			gsn_steal;
int			gsn_disarm;
int                     gsn_poison_weapon;

int                     gsn_bash;
int			gsn_enhanced_damage;
int			gsn_kick;
int			gsn_parry;
int			gsn_rescue;
int			gsn_second_attack;
int			gsn_third_attack;

int			gsn_blindness;
int			gsn_charm_person;
int			gsn_curse;
int			gsn_invis;
int			gsn_mass_invis;
int			gsn_poison;
int			gsn_sleep;

int                     gsn_advance;
int                     gsn_allow;
int                     gsn_at;
int                     gsn_bamfin;
int                     gsn_bamfout;
int                     gsn_ban;
int                     gsn_deny;
int                     gsn_disconnect;
int                     gsn_echo;
int                     gsn_force;
int                     gsn_freeze;
int                     gsn_goto;
int                     gsn_holylight;
int                     gsn_immtalk;
int                     gsn_log;
int                     gsn_memory;
int                     gsn_mfind;
int                     gsn_mload;
int                     gsn_mset;
int                     gsn_mstat;
int                     gsn_mwhere;
int                     gsn_newlock;
int                     gsn_noemote;
int                     gsn_notell;
int                     gsn_numlock;
int                     gsn_ofind;
int                     gsn_oload;
int                     gsn_oset;
int                     gsn_ostat;
int                     gsn_owhere;
int                     gsn_pardon;
int                     gsn_peace;
int                     gsn_purge;
int                     gsn_reboot;
int                     gsn_recho;
int                     gsn_restore;
int                     gsn_return;
int                     gsn_rset;
int                     gsn_rstat;
int                     gsn_shutdown;
int                     gsn_silence;
int                     gsn_slay;
int                     gsn_slookup;
int                     gsn_snoop;
int                     gsn_sset;
int                     gsn_sstime;
int                     gsn_switch;
int                     gsn_transfer;
int                     gsn_trust;
int                     gsn_users;
int                     gsn_wizhelp;
int                     gsn_wizify;
int                     gsn_wizinvis;
int                     gsn_wizlock;

/*
 * Psionicist gsn's.
 */
int                     gsn_chameleon;
int                     gsn_domination;
int                     gsn_heighten;
int                     gsn_shadow;

/*
 * Locals.
 */
MOB_INDEX_DATA *	mob_index_hash	        [ MAX_KEY_HASH       ];
OBJ_INDEX_DATA *	obj_index_hash	        [ MAX_KEY_HASH       ];
ROOM_INDEX_DATA *	room_index_hash         [ MAX_KEY_HASH       ];
char *			string_hash	        [ MAX_KEY_HASH       ];

AREA_DATA *		area_first;
AREA_DATA *		area_last;

char *			string_space;
char *			top_string;
char			str_empty	        [ 1                  ];

int			top_affect;
int			top_area;
int			top_ed;
int			top_exit;
int			top_help;
int			top_mob_index;
int			top_obj_index;
int			top_reset;
int			top_room;
int			top_shop;

/*
 * Memory management.
 * Increase MAX_STRING from 1500000 if you have too.
 * Tune the others only if you understand what you're doing.
 */
#define			MAX_STRING      1500000

#if defined( machintosh )
#define			MAX_PERM_BLOCK  131072
#define			MAX_MEM_LIST    11

void *			rgFreeList              [ MAX_MEM_LIST       ];
const int		rgSizeList              [ MAX_MEM_LIST       ]  =
{
    16, 32, 64, 128, 256, 1024, 2048, 4096, 8192, 16384, 32768-64
};
#else
#define			MAX_PERM_BLOCK  131072
#define			MAX_MEM_LIST    12

void *			rgFreeList              [ MAX_MEM_LIST       ];
const int		rgSizeList              [ MAX_MEM_LIST       ]  =
{
    16, 32, 64, 128, 256, 1024, 2048, 4096, 8192, 16384, 32768, 65536
};
#endif

int			nAllocString;
int			sAllocString;
int			nAllocPerm;
int			sAllocPerm;



/*
 * Semi-locals.
 */
bool			fBootDb;
FILE *			fpArea;
char			strArea                 [ MAX_INPUT_LENGTH   ];



/*
 * Local booting procedures.
 */
void	init_mm		args( ( void ) );

void	load_area       args( ( FILE *fp ) );
void	load_helps      args( ( FILE *fp ) );
void    load_recall     args( ( FILE *fp ) );
void	load_mobiles    args( ( FILE *fp ) );
void	load_objects    args( ( FILE *fp ) );
void	load_resets     args( ( FILE *fp ) );
void	load_rooms      args( ( FILE *fp ) );
void	load_shops      args( ( FILE *fp ) );
void	load_specials   args( ( FILE *fp ) );
void	load_notes      args( ( void ) );
void    load_down_time  args( ( void ) );
void	fix_exits       args( ( void ) );

void	reset_area      args( ( AREA_DATA * pArea ) );



/*
 * Big mama top level function.
 */
void boot_db( void )
{
    /*
     * Init some data space stuff.
     */
    {
	if ( !( string_space = calloc( 1, MAX_STRING ) ) )
	{
	    bug( "Boot_db: can't alloc %d string space.", MAX_STRING );
	    exit( 1 );
	}
	top_string	= string_space;
	fBootDb		= TRUE;
    }

    /*
     * Init random number generator.
     */
    {
	init_mm( );
    }

    /*
     * Set time and weather.
     */
    {
	long lhour, lday, lmonth;

	lhour		= ( current_time - 650336715 )
			   / ( PULSE_TICK / PULSE_PER_SECOND );
	time_info.hour  = lhour  % 24;
	lday		= lhour  / 24;
	time_info.day	= lday   % 35;
	lmonth		= lday   / 35;
	time_info.month	= lmonth % 17;
	time_info.year	= lmonth / 17;

	     if ( time_info.hour <  5 ) weather_info.sunlight = SUN_DARK;
	else if ( time_info.hour <  6 ) weather_info.sunlight = SUN_RISE;
	else if ( time_info.hour < 19 ) weather_info.sunlight = SUN_LIGHT;
	else if ( time_info.hour < 20 ) weather_info.sunlight = SUN_SET;
	else                            weather_info.sunlight = SUN_DARK;

	weather_info.change	= 0;
	weather_info.mmhg	= 960;
	if ( time_info.month >= 7 && time_info.month <=12 )
	    weather_info.mmhg += number_range( 1, 50 );
	else
	    weather_info.mmhg += number_range( 1, 80 );

	     if ( weather_info.mmhg <=  980 ) weather_info.sky = SKY_LIGHTNING;
	else if ( weather_info.mmhg <= 1000 ) weather_info.sky = SKY_RAINING;
	else if ( weather_info.mmhg <= 1020 ) weather_info.sky = SKY_CLOUDY;
	else                                  weather_info.sky = SKY_CLOUDLESS;

    }

    /*
     * Assign gsn's for skills which have them.
     */
    {
	int sn;

	for ( sn = 0; sn < MAX_SKILL; sn++ )
	{
	    if ( skill_table[sn].pgsn )
		*skill_table[sn].pgsn = sn;
	}
    }

    /*
     * Read in all the area files.
     */
    {
	FILE *fpList;

	if ( !( fpList = fopen( AREA_LIST, "r" ) ) )
	{
	    perror( AREA_LIST );
	    exit( 1 );
	}

	for ( ; ; )
	{
	    strcpy( strArea, fread_word( fpList ) );
	    if ( strArea[0] == '$' )
		break;

	    if ( strArea[0] == '-' )
	    {
		fpArea = stdin;
	    }
	    else
	    {
		if ( !( fpArea = fopen( strArea, "r" ) ) )
		{
		    perror( strArea );
		    exit( 1 );
		}
	    }

	    for ( ; ; )
	    {
		char *word;

		if ( fread_letter( fpArea ) != '#' )
		{
		    bug( "Boot_db: # not found.", 0 );
		    exit( 1 );
		}

		word = fread_word( fpArea );

		     if ( word[0] == '$'               )
                    break;
		else if ( !str_cmp( word, "AREA"     ) )
		    load_area    ( fpArea );
		else if ( !str_cmp( word, "HELPS"    ) ) 
		    load_helps   ( fpArea );
		else if ( !str_cmp( word, "RECALL"   ) )
		    load_recall  ( fpArea );
		else if ( !str_cmp( word, "MOBILES"  ) )
		    load_mobiles ( fpArea );
		else if ( !str_cmp( word, "OBJECTS"  ) )
		    load_objects ( fpArea );
		else if ( !str_cmp( word, "RESETS"   ) )
		    load_resets  ( fpArea );
		else if ( !str_cmp( word, "ROOMS"    ) )
		    load_rooms   ( fpArea );
		else if ( !str_cmp( word, "SHOPS"    ) )
		    load_shops   ( fpArea );
		else if ( !str_cmp( word, "SPECIALS" ) )
		    load_specials( fpArea );
		else
		{
		    bug( "Boot_db: bad section name.", 0 );
		    exit( 1 );
		}
	    }

	    if ( fpArea != stdin )
		fclose( fpArea );
	    fpArea = NULL;
	}
	fclose( fpList );
    }

    /*
     * Fix up exits.
     * Declare db booting over.
     * Reset all areas once.
     * Load up the notes file.
     */
    {
	fix_exits( );
	fBootDb = FALSE;
	area_update( );
	load_notes( );
	load_down_time( );
    }

    return;
}



/*
 * Snarf an 'area' header line.
 */
void load_area( FILE *fp )
{
    AREA_DATA *pArea;

    pArea		= alloc_perm( sizeof( *pArea ) );
    pArea->reset_first	= NULL;
    pArea->reset_last	= NULL;
    pArea->name		= fread_string( fp );
    pArea->recall       = ROOM_VNUM_TEMPLE;
    pArea->age		= 15;
    pArea->nplayer	= 0;

    if ( !area_first )
	area_first = pArea;
    if (  area_last  )
	area_last->next = pArea;
    area_last	= pArea;
    pArea->next	= NULL;

    top_area++;
    return;
}



/*
 * Snarf a help section.
 */
void load_helps( FILE *fp )
{
    HELP_DATA *pHelp;

    for ( ; ; )
    {
	pHelp		= alloc_perm( sizeof( *pHelp ) );
	pHelp->level	= fread_number( fp );
	pHelp->keyword	= fread_string( fp );
	if ( pHelp->keyword[0] == '$' )
	    break;
	pHelp->text	= fread_string( fp );

	if ( !str_cmp( pHelp->keyword, "greeting" ) )
	    help_greeting = pHelp->text;

	if ( !help_first )
	    help_first = pHelp;
	if (  help_last  )
	    help_last->next = pHelp;

	help_last	= pHelp;
	pHelp->next	= NULL;
	top_help++;
    }

    return;
}



/*
 * Snarf a recall point.
 */
void load_recall( FILE *fp )
{
    AREA_DATA *pArea;
    char       buf [ MAX_STRING_LENGTH ];

    pArea         = area_last;
    pArea->recall = fread_number( fp );

    if ( pArea->recall < 1 )
    {
        sprintf( buf, "Load_recall:  %s invalid recall point", pArea->name );
	bug( buf, NULL );
	pArea->recall = ROOM_VNUM_TEMPLE;
    }

    return;

}



/*
 * Snarf a mob section.
 */
void load_mobiles( FILE *fp )
{
    MOB_INDEX_DATA *pMobIndex;

    for ( ; ; )
    {
	char letter;
	int  vnum;
	int  iHash;

	letter				= fread_letter( fp );
	if ( letter != '#' )
	{
	    bug( "Load_mobiles: # not found.", 0 );
	    exit( 1 );
	}

	vnum				= fread_number( fp );
	if ( vnum == 0 )
	    break;

	fBootDb = FALSE;
	if ( get_mob_index( vnum ) )
	{
	    bug( "Load_mobiles: vnum %d duplicated.", vnum );
	    exit( 1 );
	}
	fBootDb = TRUE;

	pMobIndex			= alloc_perm( sizeof( *pMobIndex ) );
	pMobIndex->vnum			= vnum;
	pMobIndex->player_name		= fread_string( fp );
	pMobIndex->short_descr		= fread_string( fp );
	pMobIndex->long_descr		= fread_string( fp );
	pMobIndex->description		= fread_string( fp );

	pMobIndex->long_descr[0]	= UPPER( pMobIndex->long_descr[0]  );
	pMobIndex->description[0]	= UPPER( pMobIndex->description[0] );

	pMobIndex->act			= fread_number( fp ) | ACT_IS_NPC;
	pMobIndex->affected_by		= fread_number( fp );
	pMobIndex->pShop		= NULL;
	pMobIndex->alignment		= fread_number( fp );
	letter				= fread_letter( fp );
	pMobIndex->level		= number_fuzzy( fread_number( fp ) );

	/*
	 * The unused stuff is for imps who want to use the old-style
	 * stats-in-files method.
	 */
	pMobIndex->hitroll              = fread_number( fp );   /* Unused */
	pMobIndex->ac                   = fread_number( fp );   /* Unused */
	pMobIndex->hitnodice            = fread_number( fp );   /* Unused */
	/* 'd'		*/                fread_letter( fp );   /* Unused */
	pMobIndex->hitsizedice          = fread_number( fp );   /* Unused */
	/* '+'		*/                fread_letter( fp );   /* Unused */
	pMobIndex->hitplus		= fread_number( fp );   /* Unused */
	pMobIndex->damnodice            = fread_number( fp );   /* Unused */
	/* 'd'		*/                fread_letter( fp );   /* Unused */
	pMobIndex->damsizedice          = fread_number( fp );   /* Unused */
	/* '+'		*/                fread_letter( fp );   /* Unused */
	pMobIndex->damplus              = fread_number( fp );   /* Unused */
	pMobIndex->gold                 = fread_number( fp );   /* Unused */
	/* xp           */                fread_number( fp );   /* Unused */
	/* position	*/                fread_number( fp );   /* Unused */
	/* start pos	*/                fread_number( fp );   /* Unused */
	pMobIndex->sex			= fread_number( fp );

	if ( letter != 'S' )
	{
	    bug( "Load_mobiles: vnum %d non-S.", vnum );
	    exit( 1 );
	}

	iHash			= vnum % MAX_KEY_HASH;
	pMobIndex->next		= mob_index_hash[iHash];
	mob_index_hash[iHash]	= pMobIndex;
	top_mob_index++;
	kill_table[URANGE( 0, pMobIndex->level, MAX_LEVEL-1 )].number++;
    }

    return;
}



/*
 * Snarf an obj section.
 */
void load_objects( FILE *fp )
{
    OBJ_INDEX_DATA *pObjIndex;

    for ( ; ; )
    {
        char *value [ 4 ];
	char  letter;
	int   vnum;
	int   iHash;

	letter				= fread_letter( fp );
	if ( letter != '#' )
	{
	    bug( "Load_objects: # not found.", 0 );
	    exit( 1 );
	}

	vnum				= fread_number( fp );
	if ( vnum == 0 )
	    break;

	fBootDb = FALSE;
	if ( get_obj_index( vnum ) )
	{
	    bug( "Load_objects: vnum %d duplicated.", vnum );
	    exit( 1 );
	}
	fBootDb = TRUE;

	pObjIndex			= alloc_perm( sizeof( *pObjIndex ) );
	pObjIndex->vnum			= vnum;
	pObjIndex->name			= fread_string( fp );
	pObjIndex->short_descr		= fread_string( fp );
	pObjIndex->description		= fread_string( fp );
	/* Action description */	  fread_string( fp );

	pObjIndex->short_descr[0]	= LOWER( pObjIndex->short_descr[0] );
	pObjIndex->description[0]	= UPPER( pObjIndex->description[0] );

	pObjIndex->item_type		= fread_number( fp );
	pObjIndex->extra_flags		= fread_number( fp );
	pObjIndex->wear_flags		= fread_number( fp );
	value[0]		        = fread_string( fp );
	value[1]		        = fread_string( fp );
	value[2]		        = fread_string( fp );
	value[3]		        = fread_string( fp );
	pObjIndex->weight		= fread_number( fp );
	pObjIndex->cost			= fread_number( fp );
	/* Cost per day */		  fread_number( fp );   /* Unused */

	/*
	 * Check here for the redundancy of invisible light sources - Kahn
	 */
	if ( pObjIndex->item_type == ITEM_LIGHT
	    && IS_SET( pObjIndex->extra_flags, ITEM_INVIS ) )
	{
	    bug( "Vnum %d : light source with ITEM_INVIS set", vnum );
	    REMOVE_BIT( pObjIndex->extra_flags, ITEM_INVIS );
	}
	    
	for ( ; ; )
	{
	    char letter;

	    letter = fread_letter( fp );

	    if ( letter == 'A' )
	    {
		AFFECT_DATA *paf;

		paf			= alloc_perm( sizeof( *paf ) );
		paf->type		= -1;
		paf->duration		= -1;
		paf->location		= fread_number( fp );
		paf->modifier		= fread_number( fp );
		paf->bitvector		= 0;
		paf->next		= pObjIndex->affected;
		pObjIndex->affected	= paf;
		top_affect++;
	    }

	    else if ( letter == 'E' )
	    {
		EXTRA_DESCR_DATA *ed;

		ed			= alloc_perm( sizeof( *ed ) );
		ed->keyword		= fread_string( fp );
		ed->description		= fread_string( fp );
		ed->next		= pObjIndex->extra_descr;
		pObjIndex->extra_descr	= ed;
		top_ed++;
	    }

	    else
	    {
		ungetc( letter, fp );
		break;
	    }
	}

	/*
	 * Translate character strings *value[] into integers:  sn's for
	 * items with spells, or straight conversion for other items.
	 * - Thelonius
	 */
	switch ( pObjIndex->item_type )
	{
	default:
	    pObjIndex->value[0] = atoi( value[0] );
	    pObjIndex->value[1] = atoi( value[1] );
	    pObjIndex->value[2] = atoi( value[2] );
	    pObjIndex->value[3] = atoi( value[3] );
	    break;

	case ITEM_PILL:
	case ITEM_POTION:
	case ITEM_SCROLL:
	    pObjIndex->value[0] = atoi( value[0] );
	    pObjIndex->value[1] = skill_lookup( value[1] );
	    pObjIndex->value[2] = skill_lookup( value[2] );
	    pObjIndex->value[3] = skill_lookup( value[3] );
	    break;

	case ITEM_STAFF:
	case ITEM_WAND:
	    pObjIndex->value[0] = atoi( value[0] );
	    pObjIndex->value[1] = atoi( value[1] );
	    pObjIndex->value[2] = atoi( value[2] );
	    pObjIndex->value[3] = skill_lookup( value[3] );
	    break;
	}

	iHash			= vnum % MAX_KEY_HASH;
	pObjIndex->next		= obj_index_hash[iHash];
	obj_index_hash[iHash]	= pObjIndex;
	top_obj_index++;
    }

    return;
}



/*
 * Snarf a reset section.
 */
void load_resets( FILE *fp )
{
    RESET_DATA *pReset;

    if ( !area_last )
    {
	bug( "Load_resets: no #AREA seen yet.", 0 );
	exit( 1 );
    }

    for ( ; ; )
    {
	EXIT_DATA       *pexit;
	ROOM_INDEX_DATA *pRoomIndex;
	char             letter;

	if ( ( letter = fread_letter( fp ) ) == 'S' )
	    break;

	if ( letter == '*' )
	{
	    fread_to_eol( fp );
	    continue;
	}

	pReset		= alloc_perm( sizeof( *pReset ) );
	pReset->command	= letter;
	/* if_flag */	  fread_number( fp );
	pReset->arg1	= fread_number( fp );
	pReset->arg2	= fread_number( fp );
	pReset->arg3	= ( letter == 'G' || letter == 'R' )
			    ? 0 : fread_number( fp );
			  fread_to_eol( fp );

	/*
	 * Validate parameters.
	 * We're calling the index functions for the side effect.
	 */
	switch ( letter )
	{
	default:
	    bug( "Load_resets: bad command '%c'.", letter );
	    exit( 1 );
	    break;

	case 'M':
	    get_mob_index  ( pReset->arg1 );
	    get_room_index ( pReset->arg3 );
	    break;

	case 'O':
	    get_obj_index  ( pReset->arg1 );
	    get_room_index ( pReset->arg3 );
	    break;

	case 'P':
	    get_obj_index  ( pReset->arg1 );
	    get_obj_index  ( pReset->arg3 );
	    break;

	case 'G':
	case 'E':
	    get_obj_index  ( pReset->arg1 );
	    break;

	case 'D':
	    pRoomIndex = get_room_index( pReset->arg1 );

	    if (   pReset->arg2 < 0
		|| pReset->arg2 > 5
		|| !( pexit = pRoomIndex->exit[pReset->arg2] )
		|| !IS_SET( pexit->exit_info, EX_ISDOOR ) )
	    {
		bug( "Load_resets: 'D': exit %d not door.", pReset->arg2 );
		exit( 1 );
	    }

	    if ( pReset->arg3 < 0 || pReset->arg3 > 2 )
	    {
		bug( "Load_resets: 'D': bad 'locks': %d.", pReset->arg3 );
		exit( 1 );
	    }

	    break;

	case 'R':
	    pRoomIndex		= get_room_index( pReset->arg1 );

	    if ( pReset->arg2 < 0 || pReset->arg2 > 6 )
	    {
		bug( "Load_resets: 'R': bad exit %d.", pReset->arg2 );
		exit( 1 );
	    }

	    break;
	}

	if ( !area_last->reset_first )
	    area_last->reset_first      = pReset;
	if (  area_last->reset_last  )
	    area_last->reset_last->next = pReset;
	    
	area_last->reset_last	= pReset;
	pReset->next		= NULL;
	top_reset++;
    }

    return;
}



/*
 * Snarf a room section.
 */
void load_rooms( FILE *fp )
{
    ROOM_INDEX_DATA *pRoomIndex;

    if ( !area_last )
    {
	bug( "Load_resets: no #AREA seen yet.", 0 );
	exit( 1 );
    }

    for ( ; ; )
    {
	char letter;
	int  vnum;
	int  door;
	int  iHash;

	letter				= fread_letter( fp );
	if ( letter != '#' )
	{
	    bug( "Load_rooms: # not found.", 0 );
	    exit( 1 );
	}

	vnum				= fread_number( fp );
	if ( vnum == 0 )
	    break;

	fBootDb = FALSE;
	if ( get_room_index( vnum ) )
	{
	    bug( "Load_rooms: vnum %d duplicated.", vnum );
	    exit( 1 );
	}
	fBootDb = TRUE;

	pRoomIndex			= alloc_perm( sizeof( *pRoomIndex ) );
	pRoomIndex->people		= NULL;
	pRoomIndex->contents		= NULL;
	pRoomIndex->extra_descr		= NULL;
	pRoomIndex->area		= area_last;
	pRoomIndex->vnum		= vnum;
	pRoomIndex->name		= fread_string( fp );
	pRoomIndex->description		= fread_string( fp );
	/* Area number */		  fread_number( fp );   /* Unused */
	pRoomIndex->room_flags		= fread_number( fp );
	pRoomIndex->sector_type		= fread_number( fp );
	pRoomIndex->light		= 0;
	for ( door = 0; door <= 5; door++ )
	    pRoomIndex->exit[door] = NULL;

	for ( ; ; )
	{
	    letter = fread_letter( fp );

	    if ( letter == 'S' || letter == 's' )
	    {
		if ( letter == 's' )
		    bug( "Load_rooms: vnum %d has lowercase 's'", vnum );
		break;
	    }

	    if ( letter == 'D' )
	    {
		EXIT_DATA *pexit;
		int        locks;

		door = fread_number( fp );
		if ( door < 0 || door > 5 )
		{
		    bug( "Fread_rooms: vnum %d has bad door number.", vnum );
		    exit( 1 );
		}

		pexit			= alloc_perm( sizeof( *pexit ) );
		pexit->description	= fread_string( fp );
		pexit->keyword		= fread_string( fp );
		pexit->exit_info	= 0;
		locks			= fread_number( fp );
		pexit->key		= fread_number( fp );
		pexit->vnum		= fread_number( fp );

		switch ( locks )
		{
		case 1: pexit->exit_info = EX_ISDOOR;                    break;
		case 2: pexit->exit_info = EX_ISDOOR | EX_PICKPROOF;     break;
		case 3: pexit->exit_info = EX_ISDOOR | EX_BASHPROOF;     break;
		case 4: pexit->exit_info = EX_ISDOOR | EX_PICKPROOF
		                         | EX_BASHPROOF;                 break;
		case 5: pexit->exit_info = EX_ISDOOR | EX_PASSPROOF;     break;
		case 6: pexit->exit_info = EX_ISDOOR | EX_PICKPROOF
		                         | EX_PASSPROOF;                 break;
		case 7: pexit->exit_info = EX_ISDOOR | EX_BASHPROOF
		                         | EX_PASSPROOF;                 break;
		case 8: pexit->exit_info = EX_ISDOOR | EX_PICKPROOF
		                         | EX_BASHPROOF | EX_PASSPROOF;  break;
		}

		pRoomIndex->exit[door]   = pexit;
		top_exit++;
	    }
	    else if ( letter == 'E' )
	    {
		EXTRA_DESCR_DATA *ed;

		ed			= alloc_perm( sizeof( *ed ) );
		ed->keyword		= fread_string( fp );
		ed->description		= fread_string( fp );
		ed->next		= pRoomIndex->extra_descr;
		pRoomIndex->extra_descr	= ed;
		top_ed++;
	    }
	    else
	    {
		bug( "Load_rooms: vnum %d has flag not 'DES'.", vnum );
		exit( 1 );
	    }
	}

	iHash			= vnum % MAX_KEY_HASH;
	pRoomIndex->next	= room_index_hash[iHash];
	room_index_hash[iHash]	= pRoomIndex;
	top_room++;
    }

    return;
}



/*
 * Snarf a shop section.
 */
void load_shops( FILE *fp )
{
    SHOP_DATA *pShop;

    for ( ; ; )
    {
	MOB_INDEX_DATA *pMobIndex;
	int iTrade;

	pShop			= alloc_perm( sizeof( *pShop ) );
	pShop->keeper		= fread_number( fp );
	if ( pShop->keeper == 0 )
	    break;
	for ( iTrade = 0; iTrade < MAX_TRADE; iTrade++ )
	    pShop->buy_type[iTrade] = fread_number( fp );
	pShop->profit_buy	= fread_number( fp );
	pShop->profit_sell	= fread_number( fp );
	pShop->open_hour	= fread_number( fp );
	pShop->close_hour	= fread_number( fp );
				  fread_to_eol( fp );
	pMobIndex		= get_mob_index( pShop->keeper );
	pMobIndex->pShop	= pShop;

	if ( !shop_first )
	    shop_first = pShop;
	if (  shop_last  )
	    shop_last->next = pShop;

	shop_last	= pShop;
	pShop->next	= NULL;
	top_shop++;
    }

    return;
}



/*
 * Snarf spec proc declarations.
 */
void load_specials( FILE *fp )
{
    for ( ; ; )
    {
	MOB_INDEX_DATA *pMobIndex;
	char letter;

	switch ( letter = fread_letter( fp ) )
	{
	default:
	    bug( "Load_specials: letter '%c' not *MS.", letter );
	    exit( 1 );

	case 'S':
	    return;

	case '*':
	    break;

	case 'M':
	    pMobIndex           = get_mob_index ( fread_number ( fp ) );
	    pMobIndex->spec_fun = spec_lookup   ( fread_word   ( fp ) );
	    if ( pMobIndex->spec_fun == 0 )
	    {
		bug( "Load_specials: 'M': vnum %d.", pMobIndex->vnum );
		exit( 1 );
	    }
	    break;
	}

	fread_to_eol( fp );
    }
}



/*
 * Snarf notes file.
 */
void load_notes( void )
{
    FILE      *fp;
    NOTE_DATA *pnotelast;

    if ( !( fp = fopen( NOTE_FILE, "r" ) ) )
	return;

    pnotelast = NULL;
    for ( ; ; )
    {
	NOTE_DATA *pnote;
	char       letter;

	do
	{
	    letter = getc( fp );
	    if ( feof(fp) )
	    {
		fclose( fp );
		return;
	    }
	}
	while ( isspace( letter ) );
	ungetc( letter, fp );

	pnote		  = alloc_perm( sizeof( *pnote ) );

	if ( str_cmp( fread_word( fp ), "sender" ) )
	    break;
	pnote->sender     = fread_string( fp );

	if ( str_cmp( fread_word( fp ), "date" ) )
	    break;
	pnote->date       = fread_string( fp );

	if ( str_cmp( fread_word( fp ), "stamp" ) )
	    break;
	pnote->date_stamp = fread_number( fp );

	if ( str_cmp( fread_word( fp ), "to" ) )
	    break;
	pnote->to_list    = fread_string( fp );

	if ( str_cmp( fread_word( fp ), "subject" ) )
	    break;
	pnote->subject    = fread_string( fp );

	if ( str_cmp( fread_word( fp ), "text" ) )
	    break;
	pnote->text       = fread_string( fp );

	if ( !note_list )
	    note_list           = pnote;
	else
	    pnotelast->next     = pnote;

	pnotelast               = pnote;
    }

    strcpy( strArea, NOTE_FILE );
    fpArea = fp;
    bug( "Load_notes: bad key word.", 0 );
    exit( 1 );
    return;
}


void load_down_time( void )
{
    FILE *fp;

    down_time = str_dup ( "*" );
    warning1  = str_dup ( "*" );
    warning2  = str_dup ( "*" );

    if ( !( fp = fopen( DOWN_TIME_FILE, "r" ) ) )
        return;

    for ( ; ; )
    {
        char *word;
	char  letter;

	do
	{
	    letter = getc( fp );
	    if ( feof( fp ) )
	    {
		fclose( fp );
		return;
	    }
	}
	while ( isspace( letter ) );
	ungetc( letter, fp );
	
	word = fread_word( fp );

	if ( !str_cmp( word, "DOWNTIME" ) )
	{
	    free_string( down_time );
	    down_time = fread_string( fp );
	}
	if ( !str_cmp( word, "WARNINGA" ) )
	{
	    free_string( warning1 );
	    warning1 = fread_string( fp );
	}
	if ( !str_cmp( word, "WARNINGB" ) )
	{
	    free_string( warning2 );
	    warning2 = fread_string( fp );
	}
    }
}

/*
 * Translate all room exits from virtual to real.
 * Has to be done after all rooms are read in.
 * Check for bad or suspicious reverse exits.
 */
void fix_exits( void )
{
		 EXIT_DATA       *pexit;
		 EXIT_DATA       *pexit_rev;
		 ROOM_INDEX_DATA *pRoomIndex;
		 ROOM_INDEX_DATA *to_room;
                 char             buf     [ MAX_STRING_LENGTH ];
    extern const int              rev_dir [ ];
		 int              iHash;
		 int              door;

    for ( iHash = 0; iHash < MAX_KEY_HASH; iHash++ )
    {
	for ( pRoomIndex  = room_index_hash[iHash];
	      pRoomIndex;
	      pRoomIndex  = pRoomIndex->next )
	{
	    bool fexit;

	    fexit = FALSE;
	    for ( door = 0; door <= 5; door++ )
	    {
		if ( ( pexit = pRoomIndex->exit[door] ) )
		{
		    fexit = TRUE;
		    if ( pexit->vnum <= 0 )
			pexit->to_room = NULL;
		    else
			pexit->to_room = get_room_index( pexit->vnum );
		}
	    }

	    if ( !fexit )
		SET_BIT( pRoomIndex->room_flags, ROOM_NO_MOB );
	}
    }

    for ( iHash = 0; iHash < MAX_KEY_HASH; iHash++ )
    {
	for ( pRoomIndex  = room_index_hash[iHash];
	      pRoomIndex;
	      pRoomIndex  = pRoomIndex->next )
	{
	    for ( door = 0; door <= 5; door++ )
	    {
		if (   ( pexit     = pRoomIndex->exit[door]       )
		    && ( to_room   = pexit->to_room               )
		    && ( pexit_rev = to_room->exit[rev_dir[door]] )
		    &&   pexit_rev->to_room != pRoomIndex )
		{
		    sprintf( buf, "Fix_exits: %d:%d -> %d:%d -> %d.",
			    pRoomIndex->vnum, door,
			    to_room->vnum,    rev_dir[door],
			    ( !pexit_rev->to_room ) ? 0
			    :  pexit_rev->to_room->vnum );
		    bug( buf, 0 );
		}
	    }
	}
    }

    return;
}



/*
 * Repopulate areas periodically.
 */
void area_update( void )
{
    AREA_DATA *pArea;

    for ( pArea = area_first; pArea; pArea = pArea->next )
    {
	CHAR_DATA *pch;

	if ( ++pArea->age < 3 )
	    continue;

	/*
	 * Check for PC's.
	 */
	if ( pArea->nplayer > 0 && pArea->age == 15 - 1 )
	{
	    for ( pch = char_list; pch; pch = pch->next )
	    {
		if ( !IS_NPC( pch )
		    && IS_AWAKE( pch )
		    && pch->in_room
		    && pch->in_room->area == pArea )
		{
		    send_to_char( "You hear the patter of little feet.\n\r",
			pch );
		}
	    }
	}

	/*
	 * Check age and reset.
	 * Note: Mud School resets every 3 minutes (not 15).
	 */
	if ( pArea->nplayer == 0 || pArea->age >= 15 )
	{
	    ROOM_INDEX_DATA *pRoomIndex;

	    reset_area( pArea );
	    pArea->age = number_range( 0, 3 );
	    pRoomIndex = get_room_index( ROOM_VNUM_SCHOOL );
	    if ( pRoomIndex && pArea == pRoomIndex->area )
		pArea->age = 15 - 3;
	}
    }

    return;
}



/*
 * Reset one area.
 */
void reset_area( AREA_DATA *pArea )
{
    CHAR_DATA  *mob;
    RESET_DATA *pReset;
    int         level;
    bool        last;

    mob 	= NULL;
    last	= TRUE;
    level	= 0;
    for ( pReset = pArea->reset_first; pReset; pReset = pReset->next )
    {
	OBJ_DATA        *obj;
	OBJ_DATA        *obj_to;
	EXIT_DATA       *pexit;
	MOB_INDEX_DATA  *pMobIndex;
	OBJ_INDEX_DATA  *pObjIndex;
	OBJ_INDEX_DATA  *pObjToIndex;
	ROOM_INDEX_DATA *pRoomIndex;

	switch ( pReset->command )
	{
	default:
	    bug( "Reset_area: bad command %c.", pReset->command );
	    break;

	case 'M':
	    if ( !( pMobIndex = get_mob_index( pReset->arg1 ) ) )
	    {
		bug( "Reset_area: 'M': bad vnum %d.", pReset->arg1 );
		continue;
	    }

	    if ( !( pRoomIndex = get_room_index( pReset->arg3 ) ) )
	    {
		bug( "Reset_area: 'R': bad vnum %d.", pReset->arg3 );
		continue;
	    }

	    if ( ( pMobIndex->spec_fun == spec_lookup( "spec_cast_ghost" ) &&
		 ( weather_info.sunlight != SUN_DARK ) ) ) continue;

	    level = URANGE( 0, pMobIndex->level - 2, LEVEL_HERO );
	    if ( pMobIndex->count >= pReset->arg2 )
	    {
		last = FALSE;
		break;
	    }

	    mob = create_mobile( pMobIndex );

	    /*
	     * Check for pet shop.
	     */
	    {
		ROOM_INDEX_DATA *pRoomIndexPrev;

		pRoomIndexPrev = get_room_index( pRoomIndex->vnum - 1 );
		if ( pRoomIndexPrev
		    && IS_SET( pRoomIndexPrev->room_flags, ROOM_PET_SHOP ) )
		    SET_BIT( mob->act, ACT_PET);
	    }

	    if ( room_is_dark( pRoomIndex ) )
		SET_BIT( mob->affected_by, AFF_INFRARED );

	    char_to_room( mob, pRoomIndex );
	    level = URANGE( 0, mob->level - 2, LEVEL_HERO );
	    last  = TRUE;
	    break;

	case 'O':
	    if ( !( pObjIndex = get_obj_index( pReset->arg1 ) ) )
	    {
		bug( "Reset_area: 'O': bad vnum %d.", pReset->arg1 );
		continue;
	    }

	    if ( !( pRoomIndex = get_room_index( pReset->arg3 ) ) )
	    {
		bug( "Reset_area: 'R': bad vnum %d.", pReset->arg3 );
		continue;
	    }

	    if ( pArea->nplayer > 0
		|| count_obj_list( pObjIndex, pRoomIndex->contents ) > 0 )
	    {
		last = FALSE;
		break;
	    }

	    obj       = create_object( pObjIndex, number_fuzzy( level ) );
	    obj->cost = 0;
	    obj_to_room( obj, pRoomIndex );
	    last = TRUE;
	    break;

	case 'P':
	    if ( !( pObjIndex = get_obj_index( pReset->arg1 ) ) )
	    {
		bug( "Reset_area: 'P': bad vnum %d.", pReset->arg1 );
		continue;
	    }

	    if ( !( pObjToIndex = get_obj_index( pReset->arg3 ) ) )
	    {
		bug( "Reset_area: 'P': bad vnum %d.", pReset->arg3 );
		continue;
	    }

	    if ( pArea->nplayer > 0
		|| !( obj_to = get_obj_type( pObjToIndex ) )
		|| count_obj_list( pObjIndex, obj_to->contains ) > 0 )
	    {
		last = FALSE;
		break;
	    }
	    
	    obj = create_object( pObjIndex, number_fuzzy( obj_to->level ) );
	    obj_to_obj( obj, obj_to );
	    last = TRUE;
	    break;

	case 'G':
	case 'E':
	    if ( !( pObjIndex = get_obj_index( pReset->arg1 ) ) )
	    {
		bug( "Reset_area: 'E' or 'G': bad vnum %d.", pReset->arg1 );
		continue;
	    }

	    if ( !last )
		break;

	    if ( !mob )
	    {
		bug( "Reset_area: 'E' or 'G': null mob for vnum %d.",
		    pReset->arg1 );
		last = FALSE;
		break;
	    }

	    if ( mob->pIndexData->pShop )
	    {
		int olevel;

		switch ( pObjIndex->item_type )
		{
		default:                olevel = 0;                      break;
		case ITEM_PILL:         olevel = number_range(  0, 10 ); break;
		case ITEM_POTION:	olevel = number_range(  0, 10 ); break;
		case ITEM_SCROLL:	olevel = number_range(  5, 15 ); break;
		case ITEM_WAND:		olevel = number_range( 10, 20 ); break;
		case ITEM_STAFF:	olevel = number_range( 15, 25 ); break;
		case ITEM_ARMOR:	olevel = number_range(  5, 15 ); break;
		case ITEM_WEAPON:	if ( pReset->command == 'G' )
		                            olevel = number_range( 5, 15 );
		                        else
					    olevel = number_fuzzy( level );
		  break;
		}

		obj = create_object( pObjIndex, olevel );
		if ( pReset->command == 'G' )
		    SET_BIT( obj->extra_flags, ITEM_INVENTORY );
	    }
	    else
	    {
		obj = create_object( pObjIndex, number_fuzzy( level ) );
	    }
	    obj_to_char( obj, mob );
	    if ( pReset->command == 'E' )
		equip_char( mob, obj, pReset->arg3 );
	    last = TRUE;
	    break;

	case 'D':
	    if ( !( pRoomIndex = get_room_index( pReset->arg1 ) ) )
	    {
		bug( "Reset_area: 'D': bad vnum %d.", pReset->arg1 );
		continue;
	    }

	    if ( !( pexit = pRoomIndex->exit[pReset->arg2] ) )
		break;

	    /* Bashed doors persist across resets */
	    if ( !IS_SET( pexit->exit_info, EX_BASHED ) )
	        switch ( pReset->arg3 )
		{
		case 0:
		    REMOVE_BIT( pexit->exit_info, EX_CLOSED );
		    REMOVE_BIT( pexit->exit_info, EX_LOCKED );
		    break;

		case 1:
		    SET_BIT(    pexit->exit_info, EX_CLOSED );
		    REMOVE_BIT( pexit->exit_info, EX_LOCKED );
		    break;

		case 2:
		    SET_BIT(    pexit->exit_info, EX_CLOSED );
		    SET_BIT(    pexit->exit_info, EX_LOCKED );
		    break;
		}

	    last = TRUE;
	    break;

	case 'R':
	    if ( !( pRoomIndex = get_room_index( pReset->arg1 ) ) )
	    {
		bug( "Reset_area: 'R': bad vnum %d.", pReset->arg1 );
		continue;
	    }

	    {
		int d0;
		int d1;

		for ( d0 = 0; d0 < pReset->arg2 - 1; d0++ )
		{
		    d1                   = number_range( d0, pReset->arg2-1 );
		    pexit                = pRoomIndex->exit[d0];
		    pRoomIndex->exit[d0] = pRoomIndex->exit[d1];
		    pRoomIndex->exit[d1] = pexit;
		}
	    }
	    break;
	}
    }

    return;
}



/*
 * Create an instance of a mobile.
 */
CHAR_DATA *create_mobile( MOB_INDEX_DATA *pMobIndex )
{
    CHAR_DATA *mob;

    if ( !pMobIndex )
    {
	bug( "Create_mobile: NULL pMobIndex.", 0 );
	exit( 1 );
    }

    if ( !char_free )
    {
	mob		= alloc_perm( sizeof( *mob ) );
    }
    else
    {
	mob		= char_free;
	char_free	= char_free->next;
    }

    clear_char( mob );
    mob->pIndexData     = pMobIndex;

    mob->name		= pMobIndex->player_name;
    mob->short_descr	= pMobIndex->short_descr;
    mob->long_descr	= pMobIndex->long_descr;
    mob->description	= pMobIndex->description;
    mob->spec_fun	= pMobIndex->spec_fun;
    mob->prompt         = str_dup( "<%hhp %mm %vmv> " );

    mob->level		= number_fuzzy( pMobIndex->level );
    mob->act		= pMobIndex->act;
    mob->affected_by	= pMobIndex->affected_by;
    mob->alignment	= pMobIndex->alignment;
    mob->sex		= pMobIndex->sex;

    mob->armor		= interpolate( mob->level, 100, -100 );

    mob->max_hit	= mob->level * 8 + number_range(
				mob->level * mob->level / 4,
				mob->level * mob->level );
    mob->hit		= mob->max_hit;
	    
    /*
     * Insert in list.
     */
    mob->next		= char_list;
    char_list		= mob;
    pMobIndex->count++;
    return mob;
}



/*
 * Create an instance of an object.
 */
OBJ_DATA *create_object( OBJ_INDEX_DATA *pObjIndex, int level )
{
    static OBJ_DATA  obj_zero;
           OBJ_DATA *obj;

    if ( !pObjIndex )
    {
	bug( "Create_object: NULL pObjIndex.", 0 );
	exit( 1 );
    }

    if ( !obj_free )
    {
	obj		= alloc_perm( sizeof( *obj ) );
    }
    else
    {
	obj		= obj_free;
	obj_free	= obj_free->next;
    }

    *obj		= obj_zero;
    obj->pIndexData	= pObjIndex;
    obj->in_room	= NULL;
    obj->level		= level;
    obj->wear_loc	= -1;

    obj->name		= pObjIndex->name;
    obj->short_descr	= pObjIndex->short_descr;
    obj->description	= pObjIndex->description;
    obj->item_type	= pObjIndex->item_type;
    obj->extra_flags	= pObjIndex->extra_flags;
    obj->wear_flags	= pObjIndex->wear_flags;
    obj->value[0]	= pObjIndex->value[0];
    obj->value[1]	= pObjIndex->value[1];
    obj->value[2]	= pObjIndex->value[2];
    obj->value[3]	= pObjIndex->value[3];
    obj->weight		= pObjIndex->weight;
    obj->cost		= number_fuzzy( 10 )
			* number_fuzzy( level ) * number_fuzzy( level );
    obj->deleted        = FALSE;

    /*
     * Mess with object properties.
     */
    switch ( obj->item_type )
    {
    default:
	bug( "Read_object: vnum %d bad type.", pObjIndex->vnum );
	break;

    case ITEM_LIGHT:
    case ITEM_TREASURE:
    case ITEM_FURNITURE:
    case ITEM_TRASH:
    case ITEM_CONTAINER:
    case ITEM_DRINK_CON:
    case ITEM_KEY:
    case ITEM_FOOD:
    case ITEM_BOAT:
    case ITEM_CORPSE_NPC:
    case ITEM_CORPSE_PC:
    case ITEM_FOUNTAIN:
	break;

    case ITEM_SCROLL:
	obj->value[0]   = number_fuzzy( obj->value[0] );
	break;

    case ITEM_WAND:
    case ITEM_STAFF:
	obj->value[0]   = number_fuzzy( obj->value[0] );
	obj->value[1]	= number_fuzzy( obj->value[1] );
	obj->value[2]	= obj->value[1];
	break;

    case ITEM_WEAPON:
	obj->value[1]   = number_fuzzy( number_fuzzy( 1 * level / 4 + 2 ) );
	obj->value[2]	= number_fuzzy( number_fuzzy( 3 * level / 4 + 6 ) );
	break;

    case ITEM_ARMOR:
	obj->value[0]   = number_fuzzy( level / 4 + 2 );
	break;

    case ITEM_POTION:
    case ITEM_PILL:
	obj->value[0]   = number_fuzzy( number_fuzzy( obj->value[0] ) );
	break;

    case ITEM_MONEY:
	obj->value[0]   = obj->cost;
	break;
    }

    obj->next		= object_list;
    object_list		= obj;
    pObjIndex->count++;

    return obj;
}



/*
 * Clear a new character.
 */
void clear_char( CHAR_DATA *ch )
{
    static CHAR_DATA ch_zero;

    *ch				= ch_zero;
    ch->name			= &str_empty[0];
    ch->short_descr		= &str_empty[0];
    ch->long_descr		= &str_empty[0];
    ch->description		= &str_empty[0];
    ch->prompt                  = &str_empty[0];
    ch->last_note               = 0;
    ch->logon			= current_time;
    ch->armor			= 100;
    ch->position		= POS_STANDING;
    ch->level                   = 0;
    ch->practice		= 21;
    ch->hit			= 20;
    ch->max_hit			= 20;
    ch->mana			= 100;
    ch->max_mana		= 100;
    ch->move			= 100;
    ch->max_move		= 100;
    ch->leader                  = NULL;
    ch->master                  = NULL;
    ch->deleted                 = FALSE;
    return;
}



/*
 * Free a character.
 */
void free_char( CHAR_DATA *ch )
{
    OBJ_DATA    *obj;
    OBJ_DATA    *obj_next;
    AFFECT_DATA *paf;

    for ( obj = ch->carrying; obj; obj = obj_next )
    {
        obj_next = obj->next_content;
        if ( obj->deleted )
	    continue;
	extract_obj( obj );
    }

    for ( paf = ch->affected; paf; paf = paf->next )
    {
        if ( paf->deleted )
	    continue;
	affect_remove( ch, paf );
    }

    free_string( ch->name               );
    free_string( ch->short_descr	);
    free_string( ch->long_descr		);
    free_string( ch->description	);
    free_string( ch->prompt             );

    if ( ch->pcdata )
    {
	free_string( ch->pcdata->pwd		);
	free_string( ch->pcdata->bamfin		);
	free_string( ch->pcdata->bamfout	);
	free_string( ch->pcdata->title		);
	ch->pcdata->next = pcdata_free;
	pcdata_free      = ch->pcdata;
    }

    ch->next	     = char_free;
    char_free	     = ch;
    return;
}



/*
 * Get an extra description from a list.
 */
char *get_extra_descr( const char *name, EXTRA_DESCR_DATA *ed )
{
    for ( ; ed; ed = ed->next )
    {
	if ( is_name( name, ed->keyword ) )
	    return ed->description;
    }
    return NULL;
}



/*
 * Translates mob virtual number to its mob index struct.
 * Hash table lookup.
 */
MOB_INDEX_DATA *get_mob_index( int vnum )
{
    MOB_INDEX_DATA *pMobIndex;

    for ( pMobIndex  = mob_index_hash[vnum % MAX_KEY_HASH];
	  pMobIndex;
	  pMobIndex  = pMobIndex->next )
    {
	if ( pMobIndex->vnum == vnum )
	    return pMobIndex;
    }

    if ( fBootDb )
    {
	bug( "Get_mob_index: bad vnum %d.", vnum );
	exit( 1 );
    }

    return NULL;
}



/*
 * Translates mob virtual number to its obj index struct.
 * Hash table lookup.
 */
OBJ_INDEX_DATA *get_obj_index( int vnum )
{
    OBJ_INDEX_DATA *pObjIndex;

    for ( pObjIndex  = obj_index_hash[vnum % MAX_KEY_HASH];
	  pObjIndex;
	  pObjIndex  = pObjIndex->next )
    {
	if ( pObjIndex->vnum == vnum )
	    return pObjIndex;
    }

    if ( fBootDb )
    {
	bug( "Get_obj_index: bad vnum %d.", vnum );
	exit( 1 );
    }

    return NULL;
}



/*
 * Translates mob virtual number to its room index struct.
 * Hash table lookup.
 */
ROOM_INDEX_DATA *get_room_index( int vnum )
{
    ROOM_INDEX_DATA *pRoomIndex;

    for ( pRoomIndex  = room_index_hash[vnum % MAX_KEY_HASH];
	  pRoomIndex;
	  pRoomIndex  = pRoomIndex->next )
    {
	if ( pRoomIndex->vnum == vnum )
	    return pRoomIndex;
    }

    if ( fBootDb )
    {
	bug( "Get_room_index: bad vnum %d.", vnum );
	exit( 1 );
    }

    return NULL;
}



/*
 * Read a letter from a file.
 */
char fread_letter( FILE *fp )
{
    char c;

    do
    {
	c = getc( fp );
    }
    while ( isspace( c ) );

    return c;
}



/*
 * Read a number from a file.
 */
int fread_number( FILE *fp )
{
    char c;
    int  number;
    bool sign;

    do
    {
	c = getc( fp );
    }
    while ( isspace( c ) );

    number = 0;

    sign   = FALSE;
    if ( c == '+' )
    {
	c = getc( fp );
    }
    else if ( c == '-' )
    {
	sign = TRUE;
	c = getc( fp );
    }

    if ( !isdigit( c ) )
    {
	bug( "Fread_number: bad format.", 0 );
	bug( "   If bad object, check for missing '~' in value[] fields.", 0 );
	exit( 1 );
    }

    while ( isdigit(c) )
    {
	number = number * 10 + c - '0';
	c      = getc( fp );
    }

    if ( sign )
	number = 0 - number;

    if ( c == '|' )
	number += fread_number( fp );
    else if ( c != ' ' )
	ungetc( c, fp );

    return number;
}



/*
 * Read and allocate space for a string from a file.
 * These strings are read-only and shared.
 * Strings are hashed:
 *   each string prepended with hash pointer to prev string,
 *   hash code is simply the string length.
 * This function takes 40% to 50% of boot-up time.
 */
char *fread_string( FILE *fp )
{
    char *plast;
    char  c;

    plast = top_string + sizeof( char * );
    if ( plast > &string_space [ MAX_STRING - MAX_STRING_LENGTH ] )
    {
	bug( "Fread_string: MAX_STRING %d exceeded.", MAX_STRING );
	exit( 1 );
    }

    /*
     * Skip blanks.
     * Read first char.
     */
    do
    {
	c = getc( fp );
    }
    while ( isspace( c ) );

    if ( ( *plast++ = c ) == '~' )
	return &str_empty[0];

    for ( ;; )
    {
	/*
	 * Back off the char type lookup,
	 *   it was too dirty for portability.
	 *   -- Furey
	 */
	switch ( *plast = getc( fp ) )
	{
	default:
	    plast++;
	    break;

	case EOF:
	    bug( "Fread_string: EOF", 0 );
	    exit( 1 );
	    break;

	case '\n':
	    plast++;
	    *plast++ = '\r';
	    break;

	case '\r':
	    break;

	case '~':
	    plast++;
	    {
		union
		{
		    char *	pc;
		    char	rgc[sizeof( char * )];
		} u1;
		int ic;
		int iHash;
		char *pHash;
		char *pHashPrev;
		char *pString;

		plast[-1] = '\0';
		iHash     = UMIN( MAX_KEY_HASH - 1, plast - 1 - top_string );
		for ( pHash = string_hash[iHash]; pHash; pHash = pHashPrev )
		{
		    for ( ic = 0; ic < sizeof( char * ); ic++ )
			u1.rgc[ic] = pHash[ic];
		    pHashPrev = u1.pc;
		    pHash    += sizeof(char *);

		    if ( top_string[sizeof( char * )] == pHash[0]
			&& !strcmp( top_string+sizeof( char * )+1, pHash+1 ) )
			return pHash;
		}

		if ( fBootDb )
		{
		    pString             = top_string;
		    top_string		= plast;
		    u1.pc		= string_hash[iHash];
		    for ( ic = 0; ic < sizeof( char * ); ic++ )
			pString[ic] = u1.rgc[ic];
		    string_hash[iHash]  = pString;

		    nAllocString += 1;
		    sAllocString += top_string - pString;
		    return pString + sizeof( char * );
		}
		else
		{
		    return str_dup( top_string + sizeof( char * ) );
		}
	    }
	}
    }
}



/*
 * Read to end of line (for comments).
 */
void fread_to_eol( FILE *fp )
{
    char c;

    do
    {
	c = getc( fp );
    }
    while ( c != '\n' && c != '\r' );

    do
    {
	c = getc( fp );
    }
    while ( c == '\n' || c == '\r' );

    ungetc( c, fp );
    return;
}



/*
 * Read one word (into static buffer).
 */
char *fread_word( FILE *fp )
{
    static char  word [ MAX_INPUT_LENGTH ];
           char *pword;
           char  cEnd;

    do
    {
	cEnd = getc( fp );
    }
    while ( isspace( cEnd ) );

    if ( cEnd == '\'' || cEnd == '"' )
    {
	pword   = word;
    }
    else
    {
	word[0] = cEnd;
	pword   = word+1;
	cEnd    = ' ';
    }

    for ( ; pword < word + MAX_INPUT_LENGTH; pword++ )
    {
	*pword = getc( fp );
	if ( cEnd == ' ' ? isspace( *pword ) : *pword == cEnd )
	{
	    if ( cEnd == ' ' )
		ungetc( *pword, fp );
	    *pword = '\0';
	    return word;
	}
    }

    bug( "Fread_word: word too long.", 0 );
    exit( 1 );
    return NULL;
}



/*
 * Allocate some ordinary memory,
 *   with the expectation of freeing it someday.
 */
void *alloc_mem( int sMem )
{
    void *pMem;
    int iList;

    for ( iList = 0; iList < MAX_MEM_LIST; iList++ )
    {
	if ( sMem <= rgSizeList[iList] )
	    break;
    }

    if ( iList == MAX_MEM_LIST )
    {
	bug( "Alloc_mem: size %d too large.", sMem );
	exit( 1 );
    }

    if ( !rgFreeList[iList] )
    {
	pMem		  = alloc_perm( rgSizeList[iList] );
    }
    else
    {
	pMem              = rgFreeList[iList];
	rgFreeList[iList] = * ( (void **) rgFreeList[iList] );
    }

    return pMem;
}



/*
 * Free some memory.
 * Recycle it back onto the free list for blocks of that size.
 */
void free_mem( void *pMem, int sMem )
{
    int iList;

    for ( iList = 0; iList < MAX_MEM_LIST; iList++ )
    {
	if ( sMem <= rgSizeList[iList] )
	    break;
    }

    if ( iList == MAX_MEM_LIST )
    {
	bug( "Free_mem: size %d too large.", sMem );
	exit( 1 );
    }

    * ( (void **) pMem ) = rgFreeList[iList];
    rgFreeList[iList]  = pMem;

    return;
}



/*
 * Allocate some permanent memory.
 * Permanent memory is never freed,
 *   pointers into it may be copied safely.
 */
void *alloc_perm( int sMem )
{
           void *pMem;
    static char *pMemPerm;
    static int   iMemPerm;

    while ( sMem % sizeof( long ) != 0 )
	sMem++;
    if ( sMem > MAX_PERM_BLOCK )
    {
	bug( "Alloc_perm: %d too large.", sMem );
	exit( 1 );
    }

    if ( !pMemPerm || iMemPerm + sMem > MAX_PERM_BLOCK )
    {
	iMemPerm = 0;
	if ( !( pMemPerm = calloc( 1, MAX_PERM_BLOCK ) ) )
	{
	    perror( "Alloc_perm" );
	    exit( 1 );
	}
    }

    pMem        = pMemPerm + iMemPerm;
    iMemPerm   += sMem;
    nAllocPerm += 1;
    sAllocPerm += sMem;
    return pMem;
}



/*
 * Duplicate a string into dynamic memory.
 * Fread_strings are read-only and shared.
 */
char *str_dup( const char *str )
{
    char *str_new;

    if ( str[0] == '\0' )
	return &str_empty[0];

    if ( str >= string_space && str < top_string )
	return (char *) str;

    str_new = alloc_mem( strlen(str) + 1 );
    strcpy( str_new, str );
    return str_new;
}



/*
 * Free a string.
 * Null is legal here to simplify callers.
 * Read-only shared strings are not touched.
 */
void free_string( char *pstr )
{
    if (  !pstr
	|| pstr == &str_empty[0]
	|| ( pstr >= string_space && pstr < top_string ) )
	return;

    free_mem( pstr, strlen( pstr ) + 1 );
    return;
}



void do_areas( CHAR_DATA *ch, char *argument )
{
    AREA_DATA *pArea1;
    AREA_DATA *pArea2;
    char        buf  [ MAX_STRING_LENGTH   ];
    char        buf1 [ MAX_STRING_LENGTH*2 ];
    int         iArea;
    int         iAreaHalf;

    buf1[0] = '\0';
    iAreaHalf = ( top_area + 1 ) / 2;
    pArea1    = area_first;
    pArea2    = area_first;
    for ( iArea = 0; iArea < iAreaHalf; iArea++ )
	pArea2 = pArea2->next;

    for ( iArea = 0; iArea < iAreaHalf; iArea++ )
    {
	sprintf( buf, "%-39s%-39s\n\r",
	    pArea1->name, ( pArea2 ) ? pArea2->name : "" );
	strcat( buf1, buf );
	pArea1 = pArea1->next;
	if ( pArea2 )
	    pArea2 = pArea2->next;
    }

    send_to_char( buf1, ch );
    return;
}



void do_memory( CHAR_DATA *ch, char *argument )
{
    CHAR_DATA *rch;
    char       buf [ MAX_STRING_LENGTH ];

    rch = get_char( ch );
    
    if ( !authorized( rch, gsn_memory ) )
        return;

    sprintf( buf, "Affects %5d\n\r", top_affect    ); send_to_char( buf, ch );
    sprintf( buf, "Areas   %5d\n\r", top_area      ); send_to_char( buf, ch );
    sprintf( buf, "ExDes   %5d\n\r", top_ed        ); send_to_char( buf, ch );
    sprintf( buf, "Exits   %5d\n\r", top_exit      ); send_to_char( buf, ch );
    sprintf( buf, "Helps   %5d\n\r", top_help      ); send_to_char( buf, ch );
    sprintf( buf, "Mobs    %5d\n\r", top_mob_index ); send_to_char( buf, ch );
    sprintf( buf, "Objs    %5d\n\r", top_obj_index ); send_to_char( buf, ch );
    sprintf( buf, "Resets  %5d\n\r", top_reset     ); send_to_char( buf, ch );
    sprintf( buf, "Rooms   %5d\n\r", top_room      ); send_to_char( buf, ch );
    sprintf( buf, "Shops   %5d\n\r", top_shop      ); send_to_char( buf, ch );

    sprintf( buf, "Strings %5d strings of %7d bytes (max %d).\n\r",
	    nAllocString, sAllocString, MAX_STRING );
    send_to_char( buf, ch );

    sprintf( buf, "Perms   %5d blocks  of %7d bytes.\n\r",
	    nAllocPerm, sAllocPerm );
    send_to_char( buf, ch );

    return;
}



/*
 * Stick a little fuzz on a number.
 */
int number_fuzzy( int number )
{
    switch ( number_bits( 2 ) )
    {
    case 0:  number -= 1; break;
    case 3:  number += 1; break;
    }

    return UMAX( 1, number );
}



/*
 * Generate a random number.
 */
int number_range( int from, int to )
{
    int power;
    int number;

    if ( ( to = to - from + 1 ) <= 1 )
	return from;

    for ( power = 2; power < to; power <<= 1 )
	;

    while ( ( number = number_mm( ) & ( power - 1 ) ) >= to )
	;

    return from + number;
}



/*
 * Generate a percentile roll.
 */
int number_percent( void )
{
    int percent;

    while ( ( percent = number_mm( ) & ( 128-1 ) ) > 99 )
	;

    return 1 + percent;
}



/*
 * Generate a random door.
 */
int number_door( void )
{
    int door;

    while ( ( door = number_mm( ) & ( 8-1 ) ) > 5 )
	;

    return door;
}



int number_bits( int width )
{
    return number_mm( ) & ( ( 1 << width ) - 1 );
}



/*
 * I've gotten too many bad reports on OS-supplied random number generators.
 * This is the Mitchell-Moore algorithm from Knuth Volume II.
 * Best to leave the constants alone unless you've read Knuth.
 * -- Furey
 */
static	int	rgiState[2+55];

void init_mm( )
{
    int *piState;
    int  iState;

    piState	= &rgiState[2];

    piState[-2]	= 55 - 55;
    piState[-1]	= 55 - 24;

    piState[0]	= ( (int) current_time ) & ( ( 1 << 30 ) - 1 );
    piState[1]	= 1;
    for ( iState = 2; iState < 55; iState++ )
    {
	piState[iState] = ( piState[iState-1] + piState[iState-2] )
			& ( ( 1 << 30 ) - 1 );
    }
    return;
}



int number_mm( void )
{
    int *piState;
    int  iState1;
    int  iState2;
    int  iRand;

    piState		= &rgiState[2];
    iState1	 	= piState[-2];
    iState2	 	= piState[-1];
    iRand	 	= ( piState[iState1] + piState[iState2] )
			& ( ( 1 << 30 ) - 1 );
    piState[iState1]	= iRand;
    if ( ++iState1 == 55 )
	iState1 = 0;
    if ( ++iState2 == 55 )
	iState2 = 0;
    piState[-2]		= iState1;
    piState[-1]		= iState2;
    return iRand >> 6;
}



/*
 * Roll some dice.
 */
int dice( int number, int size )
{
    int idice;
    int sum;

    switch ( size )
    {
    case 0: return 0;
    case 1: return number;
    }

    for ( idice = 0, sum = 0; idice < number; idice++ )
	sum += number_range( 1, size );

    return sum;
}



/*
 * Simple linear interpolation.
 */
int interpolate( int level, int value_00, int value_47 )
{
    return value_00 + level * ( value_47 - value_00 ) / 47;
}



/*
 * Removes the tildes from a string.
 * Used for player-entered strings that go into disk files.
 */
void smash_tilde( char *str )
{
    for ( ; *str != '\0'; str++ )
    {
	if ( *str == '~' )
	    *str = '-';
    }

    return;
}



/*
 * Compare strings, case insensitive.
 * Return TRUE if different
 *   (compatibility with historical functions).
 */
bool str_cmp( const char *astr, const char *bstr )
{
    if ( !astr )
    {
	bug( "Str_cmp: null astr.", 0 );
	return TRUE;
    }

    if ( !bstr )
    {
	bug( "Str_cmp: null bstr.", 0 );
	return TRUE;
    }

    for ( ; *astr || *bstr; astr++, bstr++ )
    {
	if ( LOWER( *astr ) != LOWER( *bstr ) )
	    return TRUE;
    }

    return FALSE;
}



/*
 * Compare strings, case insensitive, for prefix matching.
 * Return TRUE if astr not a prefix of bstr
 *   (compatibility with historical functions).
 */
bool str_prefix( const char *astr, const char *bstr )
{
    if ( !astr )
    {
	bug( "Str_prefix: null astr.", 0 );
	return TRUE;
    }

    if ( !bstr )
    {
	bug( "Str_prefix: null bstr.", 0 );
	return TRUE;
    }

    for ( ; *astr; astr++, bstr++ )
    {
	if ( LOWER( *astr ) != LOWER( *bstr ) )
	    return TRUE;
    }

    return FALSE;
}



/*
 * Compare strings, case insensitive, for match anywhere.
 * Returns TRUE is astr not part of bstr.
 *   (compatibility with historical functions).
 */
bool str_infix( const char *astr, const char *bstr )
{
    char c0;
    int  sstr1;
    int  sstr2;
    int  ichar;

    if ( ( c0 = LOWER( astr[0] ) ) == '\0' )
	return FALSE;

    sstr1 = strlen( astr );
    sstr2 = strlen( bstr );

    for ( ichar = 0; ichar <= sstr2 - sstr1; ichar++ )
    {
	if ( c0 == LOWER( bstr[ichar] ) && !str_prefix( astr, bstr + ichar ) )
	    return FALSE;
    }

    return TRUE;
}



/*
 * Compare strings, case insensitive, for suffix matching.
 * Return TRUE if astr not a suffix of bstr
 *   (compatibility with historical functions).
 */
bool str_suffix( const char *astr, const char *bstr )
{
    int sstr1;
    int sstr2;

    sstr1 = strlen( astr );
    sstr2 = strlen( bstr );
    if ( sstr1 <= sstr2 && !str_cmp( astr, bstr + sstr2 - sstr1 ) )
	return FALSE;
    else
	return TRUE;
}



/*
 * Returns an initial-capped string.
 */
char *capitalize( const char *str )
{
    static char strcap [ MAX_STRING_LENGTH ];
           int  i;

    for ( i = 0; str[i] != '\0'; i++ )
	strcap[i] = LOWER( str[i] );
    strcap[i] = '\0';
    strcap[0] = UPPER( strcap[0] );
    return strcap;
}



/*
 * Append a string to a file.
 */
void append_file( CHAR_DATA *ch, char *file, char *str )
{
    FILE *fp;

    if ( IS_NPC( ch ) || str[0] == '\0' )
	return;

    fclose( fpReserve );
    if ( !( fp = fopen( file, "a" ) ) )
    {
	perror( file );
	send_to_char( "Could not open the file!\n\r", ch );
    }
    else
    {
	fprintf( fp, "[%5d] %s: %s\n",
		ch->in_room ? ch->in_room->vnum : 0, ch->name, str );
	fclose( fp );
    }

    fpReserve = fopen( NULL_FILE, "r" );
    return;
}



/*
 * Reports a bug.
 */
void bug( const char *str, int param )
{
    FILE *fp;
    char  buf [ MAX_STRING_LENGTH ];

    if ( fpArea )
    {
	int iLine;
	int iChar;

	if ( fpArea == stdin )
	{
	    iLine = 0;
	}
	else
	{
	    iChar = ftell( fpArea );
	    fseek( fpArea, 0, 0 );
	    for ( iLine = 0; ftell( fpArea ) < iChar; iLine++ )
	    {
		while ( getc( fpArea ) != '\n' )
		    ;
	    }
	    fseek( fpArea, iChar, 0 );
	}

	sprintf( buf, "[*****] FILE: %s LINE: %d", strArea, iLine );
	log_string( buf );

	if ( ( fp = fopen( "shutdown.txt", "a" ) ) )
	{
	    fprintf( fp, "[*****] %s\n", buf );
	    fclose( fp );
	}
    }

    strcpy( buf, "[*****] BUG: " );
    sprintf( buf + strlen( buf ), str, param );
    log_string( buf );

    fclose( fpReserve );
    if ( ( fp = fopen( BUG_FILE, "a" ) ) )
    {
	fprintf( fp, "%s\n", buf );
	fclose( fp );
    }
    fpReserve = fopen( NULL_FILE, "r" );

    return;
}



/*
 * Writes a string to the log.
 */
void log_string( const char *str )
{
    char *strtime;

    strtime                    = ctime( &current_time );
    strtime[strlen( strtime )-1] = '\0';
    fprintf( stderr, "%s :: %s\n", strtime, str );
    return;
}



/*
 * This function is here to aid in debugging.
 * If the last expression in a function is another function call,
 *   gcc likes to generate a JMP instead of a CALL.
 * This is called "tail chaining."
 * It hoses the debugger call stack for that call.
 * So I make this the last call in certain critical functions,
 *   where I really need the call stack to be right for debugging!
 *
 * If you don't understand this, then LEAVE IT ALONE.
 * Don't remove any calls to tail_chain anywhere.
 *
 * -- Furey
 */
void tail_chain( void )
{
    return;
}