171 lines
5.3 KiB
C
171 lines
5.3 KiB
C
/*
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* Empire - A multi-player, client/server Internet based war game.
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* Copyright (C) 1986-2005, Dave Pare, Jeff Bailey, Thomas Ruschak,
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* Ken Stevens, Steve McClure
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* ---
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*
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* See the "LEGAL", "LICENSE", "CREDITS" and "README" files for all the
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* related information and legal notices. It is expected that any future
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* projects/authors will amend these files as needed.
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*
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* ---
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*
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* file.h: Describes Empire tables (`files' for historical reasons)
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*
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* Known contributors to this file:
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* Markus Armbruster, 2005
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*/
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#ifndef FILE_H
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#define FILE_H
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#include <stddef.h>
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#include <time.h>
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struct empfile {
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/* Members with immutable values */
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int uid; /* Table ID */
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char *name; /* Empire name (e.g., "treaty") */
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char *file; /* if backed by file, file name relative to
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data directory */
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struct castr *cadef; /* table column selectors (column meta-data) */
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int size; /* size of a table entry */
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int flags; /* only EFF_IMMUTABLE immutable, see below
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for use of remaining bits */
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/* Members whose values are fixed when the cache is mapped */
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char *cache; /* pointer to cache */
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int csize; /* cache size, in entries */
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/* and flags bit EFF_MEM */
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/* Members whose values may vary throughout operation */
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int baseid; /* id of first entry in cache */
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int cids; /* # entries in cache */
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int fids; /* # entries in table */
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int fd; /* file descriptor, -1 if not open */
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/* and flags bit EFF_RDONLY */
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/* User callbacks */
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void (*init)(int, char *); /* called after entry creation, unless null */
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int (*postread)(int, char *); /* called after read, unless null */
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int (*prewrite)(int, char *); /* called before write, unless null */
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};
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/*
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* Flag bits for struct empfile member flags
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* Immutable flags are properties of the table and thus cannot change.
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* The remaining flags record how the table is being used.
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*/
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/* Immutable flags, fixed at compile-time */
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/*
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* EFF_XY / EFF_OWNER / EFF_GROUP assert that coordinates / owner /
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* group of such a table's entries can be safely obtained by
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* dereferencing entry address cast to struct genitem *.
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*/
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#define EFF_XY bit(0)
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#define EFF_OWNER bit(1)
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#define EFF_GROUP bit(2)
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/* Table is allocated statically */
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#define EFF_STATIC bit(3)
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/* All the immutable flags */
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#define EFF_IMMUTABLE (EFF_XY | EFF_OWNER | EFF_GROUP | EFF_STATIC)
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/* Flags set when table contents is mapped */
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/* Table is entirely in memory */
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#define EFF_MEM bit(8)
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/* Table is read-only */
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#define EFF_RDONLY bit(9)
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/* Transient flags, only occur in argument of ef_open() */
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/* Create table file, clobbering any existing file */
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#define EFF_CREATE bit(10)
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/*
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* Empire `file types'
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* These are really table IDs. Some tables are backed by files, some
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* are compiled into the server.
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*/
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/* Error value */
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#define EF_BAD -1
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/* Dynamic game data tables */
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#define EF_SECTOR 0
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#define EF_SHIP 1
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#define EF_PLANE 2
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#define EF_LAND 3
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#define EF_NUKE 4
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#define EF_NEWS 5
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#define EF_TREATY 6
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#define EF_TRADE 7
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#define EF_POWER 8
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#define EF_NATION 9
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#define EF_LOAN 10
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#define EF_MAP 11
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#define EF_BMAP 12
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#define EF_COMM 13
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#define EF_LOST 14
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/* Static game data (configuration) */
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#define EF_SECTOR_CHR 15
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#define EF_SHIP_CHR 16
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#define EF_PLANE_CHR 17
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#define EF_LAND_CHR 18
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#define EF_NUKE_CHR 19
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#define EF_NEWS_CHR 20
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#define EF_TREATY_FLAGS 21
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#define EF_ITEM 22
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#define EF_INFRASTRUCTURE 23
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#define EF_PRODUCT 24
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#define EF_TABLE 25
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#define EF_SHIP_CHR_FLAGS 26
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#define EF_PLANE_CHR_FLAGS 27
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#define EF_LAND_CHR_FLAGS 28
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#define EF_NUKE_CHR_FLAGS 29
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#define EF_META 30
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#define EF_META_TYPE 31
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#define EF_META_FLAGS 32
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#define EF_MISSIONS 33
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#define EF_PLANE_FLAGS 34
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#define EF_RETREAT_FLAGS 35
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#define EF_NATION_FLAGS 36
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#define EF_NATION_RELATIONS 37
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#define EF_LEVEL 38
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#define EF_AGREEMENT_STATUS 39
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#define EF_PLAGUE_STAGES 40
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#define EF_PACKING 41
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#define EF_RESOURCES 42
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#define EF_MAX 43
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#define EF_IS_GAME_STATE(type) (EF_SECTOR <= (type) && (type) <= EF_LOST)
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extern struct castr *ef_cadef(int);
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extern int ef_read(int, int, void *);
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extern void *ef_ptr(int, int);
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extern char *ef_nameof(int);
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extern time_t ef_mtime(int);
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extern int ef_open(int, int);
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extern int ef_check(int);
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extern int ef_close(int);
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extern int ef_flush(int);
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extern int ef_write(int, int, void *);
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extern int ef_extend(int, int);
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extern int ef_ensure_space(int, int, int);
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extern int ef_nelem(int);
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extern int ef_flags(int);
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extern int ef_byname(char *);
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extern int ef_byname_from(char *, int *);
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extern void ef_init(void);
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extern int ef_load(void);
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extern int ef_verify(void);
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extern struct empfile empfile[EF_MAX + 1];
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#endif
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