/*
* Empire - A multi-player, client/server Internet based war game.
- * Copyright (C) 1986-2010, 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/>.
*
* ---
*
* but have to go somewhere!
*
* Known contributors to this file:
- * Doug Hay, 1998
+ * Doug Hay, 1998
+ * Markus Armbruster, 2004-2020
*/
#ifndef MISC_H
#define MAX(a,b) ((a) > (b) ? (a) : (b))
#define MIN(a,b) ((a) < (b) ? (a) : (b))
+#define LIMIT_TO(val, min, max) \
+ ((val) < (min) ? (min) : (val) > (max) ? (max) : (val))
+
#ifdef _WIN32
#include "w32misc.h"
#endif /* _WIN32 */
#define ATTRIBUTE(attrs)
#endif
-/*
- * This uses a lot of thread stack with some versions of GNU libc,
- * which can lead to nasty heap smashes (observed with 2.2.93).
- * Disabled for now, until we readjust thread stack sizes.
- */
-#if 0
-#define RESOLVE_IPADDRESS /* resolve ip addresses into hostnames */
-#endif
-
#ifndef bit
-#define bit(x) (1<<(x))
+#define bit(x) (1U<<(x))
#endif
#define minutes(x) (60*(x))
#define days(x) (60*60*24*(x))
/*
- * If EXPR is true, an internal error occured.
- * Return EXPR != 0.
+ * If @expr is true, an internal error occured.
+ * Return @expr != 0.
* Usage: if (CANT_HAPPEN(...)) <recovery code>;
*/
#define CANT_HAPPEN(expr) ((expr) ? oops(#expr, __FILE__, __LINE__), 1 : 0)
extern void oops(char *, char *, int);
extern void (*oops_handler)(void);
+/*
+ * Assert constant expression @cond, return 1.
+ * If @cond is zero, force a compilation error.
+ */
+#define BUILD_ASSERT_ONE(cond) \
+ (sizeof(char[1 - 2 * !(cond)]))
+
+/*
+ * Assert constant expression @cond.
+ * If @cond is zero, force a compilation error.
+ */
+#define BUILD_ASSERT(cond) \
+ ((void)BUILD_ASSERT_ONE(cond))
+
+/*
+ * Number of elements in ARRAY.
+ */
+#define ARRAY_SIZE(array) (sizeof(array) / sizeof(array[0]))
+
void exit_nomem(void) ATTRIBUTE((noreturn));
/* return codes from command routines */
extern char *prbuf(char *format, ...)
ATTRIBUTE((format (printf, 1, 2)));
-#define AGREE_FREE 0
-#define AGREE_PROPOSED 1
-#define AGREE_SIGNED 2
-
#endif