/*
* Empire - A multi-player, client/server Internet based war game.
- * Copyright (C) 1986-2011, Dave Pare, Jeff Bailey, Thomas Ruschak,
+ * Copyright (C) 1986-2021, Dave Pare, Jeff Bailey, Thomas Ruschak,
* Ken Stevens, Steve McClure, Markus Armbruster
*
* Empire is free software: you can redistribute it and/or modify
*
* Known contributors to this file:
* 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