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authorAndreas Rottmann <a.rottmann@gmx.at>2009-09-14 12:32:44 +0200
committerAndreas Rottmann <a.rottmann@gmx.at>2009-09-14 12:32:44 +0200
commitfa095a4504cbe668e4244547e2c141597bea4ecf (patch)
tree06135820a286ffec47804e75fbf8a147e92acd2e /lib/minmax.h
Imported Upstream version 0.9.1upstream/0.9.1
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+/* MIN, MAX macros.
+ Copyright (C) 1995, 1998, 2001, 2003, 2005 Free Software Foundation, Inc.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation; either version 2, 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 Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with this program; if not, write to the Free Software Foundation,
+ Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
+
+#ifndef _MINMAX_H
+#define _MINMAX_H
+
+/* Note: MIN, MAX are also defined in <sys/param.h> on some systems
+ (glibc, IRIX, HP-UX, OSF/1). Therefore you might get warnings about
+ MIN, MAX macro redefinitions on some systems; the workaround is to
+ #include this file as the last one among the #include list. */
+
+/* Before we define the following symbols we get the <limits.h> file
+ since otherwise we get redefinitions on some systems if <limits.h> is
+ included after this file. Likewise for <sys/param.h>.
+ If more than one of these system headers define MIN and MAX, pick just
+ one of the headers (because the definitions most likely are the same). */
+#if HAVE_MINMAX_IN_LIMITS_H
+# include <limits.h>
+#elif HAVE_MINMAX_IN_SYS_PARAM_H
+# include <sys/param.h>
+#endif
+
+/* Note: MIN and MAX should be used with two arguments of the
+ same type. They might not return the minimum and maximum of their two
+ arguments, if the arguments have different types or have unusual
+ floating-point values. For example, on a typical host with 32-bit 'int',
+ 64-bit 'long long', and 64-bit IEEE 754 'double' types:
+
+ MAX (-1, 2147483648) returns 4294967295.
+ MAX (9007199254740992.0, 9007199254740993) returns 9007199254740992.0.
+ MAX (NaN, 0.0) returns 0.0.
+ MAX (+0.0, -0.0) returns -0.0.
+
+ and in each case the answer is in some sense bogus. */
+
+/* MAX(a,b) returns the maximum of A and B. */
+#ifndef MAX
+# define MAX(a,b) ((a) > (b) ? (a) : (b))
+#endif
+
+/* MIN(a,b) returns the minimum of A and B. */
+#ifndef MIN
+# define MIN(a,b) ((a) < (b) ? (a) : (b))
+#endif
+
+#endif /* _MINMAX_H */