Update copyright notice

[empserver] / src / lib / subs / getbit.c

diff --git a/src/lib/subs/getbit.c b/src/lib/subs/getbit.c
index fdff4b2b8a512fbe147451793a145f04f257e6d3..d48b6d176e26f58ab3c3bedf3125cd278c846eb1 100644 (file)
--- a/src/lib/subs/getbit.c
+++ b/src/lib/subs/getbit.c
@@ -1,11 +1,11 @@
 /*
  *  Empire - A multi-player, client/server Internet based war game.
- *  Copyright (C) 1986-2006, Dave Pare, Jeff Bailey, Thomas Ruschak,
- *                           Ken Stevens, Steve McClure
+ *  Copyright (C) 1986-2015, 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,
@@ -14,8 +14,7 @@
  *  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/>.
  *
  *  ---
  *
@@ -26,7 +25,7 @@
  *  ---
  *
  *  getbit.c: Replaces old bitmap code
- * 
+ *
  *  Known contributors to this file:
  *     Dave Pare, 1989
  */
@@ -114,25 +113,22 @@ static int *bitmaps[5] = {
     bitmap4,
 };
 
-#define GCFx(x) ((x + WORLD_X) % WORLD_X)
-#define GCFy(y) ((y + WORLD_Y) % WORLD_Y)
-
 int
 emp_getbit(int x, int y, unsigned char *bitmap)
 {
-    int id;
-
-    id = (GCFy(y)) * WORLD_X / 2 + GCFx(x) / 2;
-    return bitmap[id / 8] & bit(id & 07);
+    int id = sctoff(x, y);
+    if (id < 0)
+       return 0;
+    return bitmap[id >> 3] & bit(id & 07);
 }
 
 void
 emp_setbit(int x, int y, unsigned char *bitmap)
 {
-    int id;
-
-    id = (GCFy(y)) * WORLD_X / 2 + GCFx(x) / 2;
-    bitmap[id / 8] |= bit(id & 07);
+    int id = sctoff(x, y);
+    if (id < 0)
+       return;
+    bitmap[id >> 3] |= bit(id & 07);
 }
 
 static void
@@ -145,8 +141,8 @@ emp_setbitmap(int x, int y, unsigned char *bitmap, int *bitmaps)
     for (mp = bitmaps; *mp != 9999;) {
        dx = x + *mp++;
        dy = y + *mp++;
-       id = (GCFy(dy)) * WORLD_X / 2 + GCFx(dx) / 2;
-       bitmap[id / 8] |= bit(id & 07);
+       id = sctoff(dx, dy);
+       bitmap[id >> 3] |= bit(id & 07);
     }
 }