Import of Empire 4.2.12

src/lib/common/land.c

@@ -0,0 +1,98 @@
+/*
+ *  Empire - A multi-player, client/server Internet based war game.
+ *  Copyright (C) 1986-2000, 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.
+ *
+ *  ---
+ *
+ *  land.c: Misc. land unit routines
+ * 
+ *  Known contributors to this file:
+ *     
+ */
+
+#include "misc.h"
+#include "var.h"
+#include "sect.h"
+#include "nat.h"
+#include "var.h"
+#include "file.h"
+#include "path.h"
+#include "xy.h"
+#include "land.h"
+#include "nsc.h"
+#include "common.h"
+#include "subs.h"
+
+int
+adj_units(coord x, coord y, natid own)
+{
+	register int i;
+	struct	sctstr sect;
+
+	for (i = DIR_FIRST; i <= DIR_LAST; i++) {
+		getsect(x + diroff[i][0], y + diroff[i][1], &sect);
+		if (has_units(sect.sct_x, sect.sct_y, own, 0))
+			return 1;
+	}
+	return 0;
+}
+
+int
+has_units(coord x, coord y, natid cn, struct lndstr *lp)
+{
+	register int n;
+	struct	lndstr land;
+	
+	for (n=0; ef_read(EF_LAND, n, (s_char *)&land); n++) {
+		if(land.lnd_x != x || land.lnd_y != y)
+			continue;
+		if (lp) {
+		    /* Check this unit.  If it is this one, we don't want
+		       it included in the count. */
+		    if (lp->lnd_uid == land.lnd_uid)
+		        continue;
+		}
+		if (land.lnd_own == cn)
+			return 1;
+	}
+
+	return 0;
+}
+
+int
+has_units_with_mob(coord x, coord y, natid cn)
+{
+	struct	nstr_item ni;
+	struct	lndstr land;
+	
+	snxtitem_xy(&ni,EF_LAND,x,y);
+	while(nxtitem(&ni,(s_char *)&land)) {
+		if (land.lnd_own != cn)
+			continue;
+		if (land.lnd_mobil > 0)
+			return 1;
+	}
+
+	return 0;
+}