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empserver/include/nsc.h
Markus Armbruster 9eba732cc3 (EF_COUNTRY, cou_ca): New. 
(empfile): Add it.
(xdvisible): Deal with it.
(ef_open_srv, ef_close_srv): Set it up.
(ef_init_view, ef_fina_view): New.
2006-01-14 16:28:33 +00:00

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/*
* Empire - A multi-player, client/server Internet based war game.
* Copyright (C) 1986-2006, Dave Pare, Jeff Bailey, Thomas Ruschak,
* Ken Stevens, Steve McClure
*
* This program 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
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* 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
*
* ---
*
* See the "LEGAL", "LICENSE", "CREDITS" and "README" files for all the
* related information and legal notices. It is expected that any future
* projects/authors will amend these files as needed.
*
* ---
*
* nsc.h: Definitions for Empire conditionals
*
* Known contributors to this file:
* Dave Pare, 1989
* Markus Armbruster, 2004
*/
#ifndef NSC_H
#define NSC_H
#include <stddef.h>
#include "xy.h"
#define NS_LSIZE 128
#define NS_NCOND 16
/* Value type */
typedef enum {
NSC_NOTYPE,
/* promoted types */
NSC_LONG, /* long */
NSC_DOUBLE, /* double */
NSC_STRING, /* char *, zero-terminated string */
NSC_TYPEID, /* signed char, index into chr table */
/* unpromoted types */
NSC_CHAR, /* signed char */
NSC_UCHAR, /* unsigned char */
NSC_SHORT, /* short */
NSC_USHORT, /* unsigned short */
NSC_INT, /* int */
NSC_XCOORD, /* coord that needs x conversion */
NSC_YCOORD, /* coord that needs y conversion */
NSC_TIME, /* time_t */
NSC_FLOAT, /* float */
NSC_STRINGY, /* char[], zero-terminated string */
/* FIXME zero may be missing */
/* aliases, must match typedefs */
NSC_NATID = NSC_UCHAR /* nation id */
} nsc_type;
typedef char packed_nsc_type;
/* Return nsc_type for a signed integer with the same size as TYPE. */
#define NSC_SITYPE(type) \
(sizeof(type) == 1 ? NSC_CHAR \
: sizeof(type) == sizeof(short) ? NSC_SHORT \
: sizeof(type) == sizeof(int) ? NSC_INT \
: sizeof(type) == sizeof(long) ? NSC_LONG \
: 1/0)
/* Value category */
typedef enum {
NSC_NOCAT,
NSC_VAL, /* evaluated value */
NSC_OFF, /* symbolic value: at offset in object */
NSC_ID /* unresolved identifier (internal use) */
} nsc_cat;
typedef char packed_nsc_cat;
enum {
NSC_DEITY = bit(0), /* access restricted to deity */
NSC_EXTRA = bit(1), /* computable from other selectors */
NSC_CONST = bit(2), /* field cannot be changed */
NSC_BITS = bit(3) /* value consists of flag bits */
};
typedef unsigned char nsc_flags;
/*
* Value, possibly symbolic.
* If type is NSC_NOTYPE, it's an error value.
* If category is NSC_OFF, the value is in a context object at offset
* val_as.sym.off + val_as.sym.idx * S, where S is the size of the
* value.
* If category is NSC_VAL, the value is in val_as, and the type is a
* promoted type.
*/
struct valstr {
packed_nsc_type val_type; /* type of value */
packed_nsc_cat val_cat; /* category of value */
union {
struct { /* cat NSC_OFF */
ptrdiff_t off;
int len;
int idx;
} sym;
double dbl; /* cat NSC_VAL, type NSC_DOUBLE */
struct { /* cat NSC_VAL, type NSC_STRING, cat NSC_ID */
char *base;
size_t maxsz;
} str;
long lng; /* cat NSC_VAL, type NSC_LONG, NSC_TYPEID */
} val_as;
};
/* Compiled condition */
struct nscstr {
char operator; /* '<', '=', '>', '#' */
packed_nsc_type optype; /* operator type */
struct valstr lft; /* left operand */
struct valstr rgt; /* right operand */
};
/* Selection type */
typedef enum {
NS_UNDEF, /* error value */
NS_LIST, /* list of IDs */
NS_DIST, /* circular area */
NS_AREA, /* rectangular area */
NS_ALL, /* everything */
NS_XY, /* one sector area */
NS_GROUP /* group, i.e. fleet, wing, army */
} ns_seltype;
/* Sector iterator */
struct nstr_sect {
coord x, y; /* current x-y */
coord dx, dy; /* accumlated x,y travel */
int id; /* return value of sctoff */
ns_seltype type; /* type of query */
int curdist; /* dist query: current range */
struct range range; /* area of coverage */
int dist; /* dist query: range */
coord cx, cy; /* dist query: center x-y */
int (*read)(int type, int id, void *ptr); /* read function */
int ncond; /* # of selection conditions */
struct nscstr cond[NS_NCOND]; /* selection conditions */
};
/* Item iterator */
struct nstr_item {
int cur; /* current item */
ns_seltype sel; /* selection type */
int type; /* item type being selected */
int curdist; /* if NS_DIST, current item's dist */
struct range range; /* NS_AREA/NS_DIST: range selector */
int dist; /* NS_DIST: distance selector */
coord cx, cy; /* NS_DIST: center x-y, NS_XY: xy */
int group; /* NS_GROUP: fleet/wing match */
int size; /* NS_LIST: size of list */
int index; /* NS_LIST: index */
int list[NS_LSIZE]; /* NS_LIST: item list */
int (*read)(int type, int id, void *ptr); /* read function */
int flags; /* ef_flags(TYPE) */
int ncond; /* # of selection conditions */
struct nscstr cond[NS_NCOND]; /* selection conditions */
};
/*
* Symbol binding: associate NAME with VALUE.
*/
struct symbol {
int value;
char *name;
};
/*
* Selector descriptor.
*/
struct castr {
packed_nsc_type ca_type; /* type of value */
nsc_flags ca_flags;
unsigned short ca_len; /* non-zero: is an array; #array elements */
ptrdiff_t ca_off; /* offset of value in the context object */
char *ca_name;
int ca_table; /* referred table ID, or EF_BAD */
};
/* variables using the above */
extern struct castr ichr_ca[];
extern struct castr pchr_ca[];
extern struct castr sect_ca[];
extern struct castr dchr_ca[];
extern struct castr ship_ca[];
extern struct castr mchr_ca[];
extern struct castr plane_ca[];
extern struct castr plchr_ca[];
extern struct castr land_ca[];
extern struct castr lchr_ca[];
extern struct castr nuke_ca[];
extern struct castr nchr_ca[];
extern struct castr treaty_ca[];
extern struct castr loan_ca[];
extern struct castr news_ca[];
extern struct castr lost_ca[];
extern struct castr commodity_ca[];
extern struct castr trade_ca[];
extern struct castr nat_ca[];
extern struct castr cou_ca[];
extern struct castr realm_ca[];
extern struct castr intrchr_ca[];
extern struct castr rpt_ca[];
extern struct castr empfile_ca[];
extern struct castr symbol_ca[];
extern struct symbol ship_chr_flags[];
extern struct symbol plane_chr_flags[];
extern struct symbol land_chr_flags[];
extern struct symbol nuke_chr_flags[];
extern struct symbol treaty_flags[];
extern struct castr mdchr_ca[];
extern struct symbol meta_type[];
extern struct symbol meta_flags[];
extern struct symbol missions[];
extern struct symbol plane_flags[];
extern struct symbol retreat_flags[];
extern struct symbol nation_status[];
extern struct symbol nation_flags[];
extern struct symbol nation_relations[];
extern struct symbol level[];
extern struct symbol agreement_statuses[];
extern struct symbol plague_stages[];
extern struct symbol packing[];
extern struct symbol resources[];
/* src/lib/subs/nstr.c */
extern int nstr_comp(struct nscstr *np, int len, int type, char *str);
extern char *nstr_comp_val(char *, struct valstr*, int);
extern int nstr_coerce_val(struct valstr *, nsc_type, char *);
extern int nstr_exec(struct nscstr *, int, void *);
extern void nstr_exec_val(struct valstr *, natid, void *, nsc_type);
extern char *symbol_by_value(int, struct symbol *);
#endif
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