Markus Armbruster
7dc0f48868
Broken in commit5f764285(v4.3.12) for negative multiples of WORLD_X and WORLD_Y, respectively. This could theoretically lead to buffer overruns and other unpleasantness. None have been reproduced, though. (cherry picked from commit7680acc39f)
75 lines
2.5 KiB
C
75 lines
2.5 KiB
C
/*
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* Empire - A multi-player, client/server Internet based war game.
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* Copyright (C) 1986-2008, 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 files README, COPYING and CREDITS in the root of the source
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* tree for related information and legal notices. It is expected
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* that future projects/authors will amend these files as needed.
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*
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* ---
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*
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* xy.h: Constants having to do with world locations.
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*
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* Known contributors to this file:
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* Steve McClure, 1998
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*/
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#ifndef XY_H
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#define XY_H
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#include "types.h"
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/* Return the number of sectors in the world */
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#define WORLD_SZ() (WORLD_X * WORLD_Y / 2)
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/* Fast version of sctoff() for normalized arguments */
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#define XYOFFSET(x, y) (((y) * WORLD_X + (x)) / 2)
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#define XNORM(x) \
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(((x) < 0) ? (WORLD_X - 1 - ((-(x) - 1) % WORLD_X)) : ((x) % WORLD_X))
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#define YNORM(y) \
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(((y) < 0) ? (WORLD_Y - 1 - ((-(y) - 1) % WORLD_Y)) : ((y) % WORLD_Y))
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struct range {
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coord lx; /* low-range x,y */
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coord ly;
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coord hx; /* high-range x,y */
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coord hy;
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int width; /* range width, height */
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int height;
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};
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extern char *xyas(coord x, coord y, natid country);
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extern char *ownxy(struct sctstr *sp);
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extern coord xrel(struct natstr *np, coord absx);
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extern coord yrel(struct natstr *np, coord absy);
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extern void xyrelrange(struct natstr *np, struct range *src,
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struct range *dst);
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extern void xyabsrange(struct natstr *np, struct range *src,
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struct range *dst);
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extern coord strtox(char *str, char **end);
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extern coord strtoy(char *str, char **end);
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extern coord xabs(struct natstr *np, coord relx);
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extern coord yabs(struct natstr *np, coord rely);
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extern coord xnorm(coord x);
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extern coord ynorm(coord y);
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extern int xyinrange(coord x, coord y, struct range *rp);
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#endif
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