/*
* Empire - A multi-player, client/server Internet based war game.
- * Copyright (C) 1986-2008, Dave Pare, Jeff Bailey, Thomas Ruschak,
- * Ken Stevens, Steve McClure
+ * Copyright (C) 1986-2021, Dave Pare, Jeff Bailey, Thomas Ruschak,
+ * Ken Stevens, Steve McClure, Markus Armbruster
*
- * This program is free software; you can redistribute it and/or modify
+ * Empire is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
+ * the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* ---
*
* ---
*
* file.h: Describes Empire tables (`files' for historical reasons)
- *
+ *
* Known contributors to this file:
- * Markus Armbruster, 2005-2008
+ * Markus Armbruster, 2005-2016
*/
#ifndef FILE_H
struct empfile {
/* Members with immutable values */
int uid; /* Table ID */
- char *name; /* Empire name (e.g., "treaty") */
- char *file; /* if backed by file, file name relative to
- data directory */
+ char *name; /* Empire name (e.g., "land") */
+ char *pretty_name; /* prettier name, e.g. "land unit" */
+ char *file; /* file name, relative to gamedir for
+ game state, to builtindir for config */
struct castr *cadef; /* table column selectors (column meta-data) */
+ int base; /* view's base table, else EF_BAD */
int size; /* size of a table entry */
+ int nent; /* #table entries, -1 if variable */
int flags; /* only EFF_IMMUTABLE immutable, see below
for use of remaining bits */
/* Members whose values are fixed when the cache is mapped */
char *cache; /* pointer to cache */
int csize; /* cache size, in entries */
- /* flags bit EFF_MEM also fixed then */
+ /* flags bits EFF_MEM, EFF_PRIVATE, EFF_NOTIME also fixed then */
/* Members whose values may vary throughout operation */
- int baseid; /* id of first entry in cache */
+ int baseid; /* ID of first entry in cache */
int cids; /* # entries in cache */
int fids; /* # entries in table */
int fd; /* file descriptor, -1 if not open */
- /* flags bits EFF_PRIVATE, EFF_CUSTOM also vary */
+ /* flags bit EFF_CUSTOM also varies */
- /* User callbacks */
- int (*postread)(int, void *); /* called after read, unless null */
- int (*prewrite)(int, void *); /* called before write, unless null */
+ /* User callbacks, may all be null */
+ /*
+ * Called after element initialization. @elt is the element.
+ * May modify the element.
+ */
+ void (*oninit)(void *elt);
+ /*
+ * Called after read. @id is the element ID, and @elt is the
+ * element read. May modify the element. Modifications are
+ * visible to caller of ef_read(), but have no effect on the file.
+ */
+ void (*postread)(int id, void *elt);
+ /*
+ * Called before write. @id is the element ID, @old is the
+ * element being updated (null unless it is cached) and @elt is
+ * the element being written. May modify the element.
+ * Modifications will be visible to caller of ef_write() and are
+ * written to the file.
+ */
+ void (*prewrite)(int id, void *old, void *elt);
+ /*
+ * Called after table size changed, with file type as argument.
+ */
+ void (*onresize)(int type);
};
-struct emptypedstr {
- short ef_type;
- short uid;
+struct ef_typedstr {
+ signed ef_type: 8;
+ unsigned seqno: 12;
+ unsigned generation: 12;
+ int uid;
time_t timestamp;
};
* The remaining flags record how the table is being used.
*/
/* Immutable flags, fixed at compile-time */
-/* Dereferencing entry address cast to struct emptypedstr * is safe */
-#define EFF_TYPED bit(0)
+/* Dereferencing entry address cast to struct ef_typedstr * is safe */
+#define EFF_TYPED bit(0)
/*
* EFF_XY / EFF_OWNER / EFF_GROUP assert that coordinates / owner /
* group of such a table's entries can be safely obtained by
#define EFF_XY bit(1)
#define EFF_OWNER bit(2)
#define EFF_GROUP bit(3)
-/* Table is allocated statically */
+/* Table cache is allocated statically */
#define EFF_STATIC bit(4)
+/* Table has a sentinel (all zero, not counted as elt), implies EFF_MEM */
+#define EFF_SENTINEL bit(5)
/* All the immutable flags */
#define EFF_IMMUTABLE \
- (EFF_TYPED | EFF_XY | EFF_OWNER | EFF_GROUP | EFF_STATIC)
+ (EFF_TYPED | EFF_XY | EFF_OWNER | EFF_GROUP | EFF_STATIC | EFF_SENTINEL)
/* Flags set when table contents is mapped */
/* Table is entirely in memory */
#define EFF_MEM bit(8)
#define EFF_PRIVATE bit(9)
/* Table is customized (configuration tables only) */
#define EFF_CUSTOM bit(10)
+/* Don't update timestamps */
+#define EFF_NOTIME bit(11)
/* Transient flags, only occur in argument of ef_open() */
/* Create table file, clobbering any existing file */
-#define EFF_CREATE bit(11)
+#define EFF_CREATE bit(16)
+
+/*
+ * A value larger than any struct empfile member size where member
+ * cadef is not null.
+ */
+#define EF_WITH_CADEF_MAX_ENTRY_SIZE 1024
/*
* Empire `file types'
EF_LAND,
EF_NUKE,
EF_NEWS,
- EF_TREATY,
EF_TRADE,
EF_POWER,
EF_NATION,
+ EF_RELAT,
+ EF_CONTACT,
+ EF_REJECT,
EF_LOAN,
EF_MAP,
EF_BMAP,
EF_RESOURCES,
EF_RETREAT_FLAGS,
EF_SECTOR_NAVIGATION,
+ EF_SECTOR_CHR_FLAGS,
EF_SHIP_CHR_FLAGS,
- EF_TREATY_FLAGS,
/* Views */
EF_COUNTRY,
/* Number of types: */
};
#define EF_IS_GAME_STATE(type) (EF_SECTOR <= (type) && (type) <= EF_DYNMAX)
-#define EF_IS_VIEW(type) (EF_COUNTRY <= (type) && (type) < EF_MAX)
+#define EF_IS_VIEW(type) (empfile[(type)].base != EF_BAD)
extern struct castr *ef_cadef(int);
extern int ef_read(int, int, void *);
+extern void ef_make_stale(void);
+extern void ef_mark_fresh(int, void *);
extern void *ef_ptr(int, int);
extern char *ef_nameof(int);
+extern char *ef_nameof_pretty(int);
extern time_t ef_mtime(int);
extern int ef_open(int, int);
-extern int ef_check(int);
+extern int ef_open_view(int);
extern int ef_close(int);
extern int ef_flush(int);
extern void ef_blank(int, int, void *);
extern int ef_write(int, int, void *);
+extern void ef_set_uid(int, void *, int);
+extern int ef_typedstr_eq(struct ef_typedstr *, struct ef_typedstr *);
extern int ef_extend(int, int);
extern int ef_ensure_space(int, int, int);
+extern int ef_id_limit(int);
extern int ef_truncate(int, int);
extern int ef_nelem(int);
extern int ef_flags(int);
extern int ef_byname(char *);
extern int ef_byname_from(char *, int *);
-extern int ef_verify(void);
+extern int ef_verify_config(void);
+extern int ef_verify_state(int);
extern int ef_elt_byname(int, char *);
extern struct empfile empfile[EF_MAX + 1];
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