db.c

MUD服务器程序

    obj->cost		= number_fuzzy( 10 )
			* number_fuzzy( level ) * number_fuzzy( level );

    /*
     * 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->practice		= 21;
    ch->hit			= 20;
    ch->max_hit			= 20;
    ch->mana			= 100;
    ch->max_mana		= 100;
    ch->move			= 100;
    ch->max_move		= 100;
    return;
}



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

    for ( obj = ch->carrying; obj != NULL; obj = obj_next )
    {
	obj_next = obj->next_content;
	extract_obj( obj );
    }

    for ( paf = ch->affected; paf != NULL; paf = paf_next )
    {
	paf_next = paf->next;
	affect_remove( ch, paf );
    }

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

    if ( ch->pcdata != NULL )
    {
	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 != NULL; 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 != NULL;
	  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 != NULL;
	  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 != NULL;
	  pRoomIndex  = pRoomIndex->next )
    {
	if ( pRoomIndex->vnum == vnum )
	    return pRoomIndex;
    }

    if ( fBootDb && !fIgnoreUnconnected)
    {
	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 )
{
    int number;
    bool sign;
    char c;

    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 );
	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 )
{
#if 0 // %%%
    return malloc(sMem);
#else
    void *pMem;
    int iList;

    sMem += 2 * sizeof (int); // @@@

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

    if ( iList == MAX_MEM_LIST )
    {
#if 1 // @@@
	bug( "Alloc_mem: size %d too large.", sMem );
	exit( 1 );
#else
   char szBuffer[256];
   wsprintf(szBuffer, "alloc_mem(%d) to large.  Continue?", sMem);
   if (MessageBox(0, szBuffer, "Merc22", MB_ICONQUESTION|MB_YESNO) == IDYES)
      return 0;
   else
      {
      DebugBreak();
      exit( 1 );
      }
#endif
    }

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

    ((int *) pMem)[0] = 0x55555555; // @@@
    ((int *) pMem)[1] = sMem; // @@@
    return ((int *) pMem) + 2; // @@@
//    return pMem; // @@@
#endif
}



/*
 * Free some memory.
 * Recycle it back onto the free list for blocks of that size.
 */
void free_mem( void *pMem, int sMem )
{
#if 0 // %%%
    free(pMem);
#else
    int iList;

#if 1 // @@@
    ((int *)pMem) -= 2;
    sMem += 2 * sizeof (int);
    if (((int *) pMem)[0] == 0xaaaaaaaa)
    {
	bug( "Free_mem: this block was already freed.", 0 );
	exit( 1 );
    }
    if (((int *) pMem)[0] != 0x55555555)
    {
	bug( "Free_mem: invalid key.", 0 );
	exit( 1 );
    }
    if (((int *) pMem)[1] != sMem)
    {
	bug( "Free_mem: invalid size.", 0 );
	exit( 1 );
    }
    ((int *) pMem)[0] = 0xaaaaaaaa;
#endif

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