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+/* Copyright (C) 2001-2021 Red Hat, Inc.
+ Copyright (C) 2003 Free Software Foundation, Inc.
+ Copyright (C) 2019-2021 SUSE LLC.
+ Written by Jakub Jelinek <jakub@redhat.com>, 2012.
+
+ 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, 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; see the file COPYING. If not, write to
+ the Free Software Foundation, 51 Franklin Street - Fifth Floor,
+ Boston, MA 02110-1301, USA. */
+
+/* Utility macros. */
+
+#define IMPLIES(A, B) (!((A) && !(B)))
+
+#define MAX(A, B) ((A) > (B) ? (A) : (B))
+#define MIN(A, B) ((A) < (B) ? (A) : (B))
+
+#define XSTR(s) STR(s)
+#define STR(s) #s
+
+#ifndef USE_GNUC
+#ifdef __GNUC__
+#define USE_GNUC 1
+#else
+#define USE_GNUC 0
+#endif
+#endif
+
+#if USE_GNUC && __GNUC__ >= 3
+# define likely(x) __builtin_expect (!!(x), 1)
+# define unlikely(x) __builtin_expect (!!(x), 0)
+#else
+# define likely(x) (x)
+# define unlikely(x) (x)
+#endif
+
+#if USE_GNUC
+# define FORCE_INLINE __attribute__((always_inline))
+# define UNUSED __attribute__((unused))
+# define USED __attribute__((used))
+#else
+# define FORCE_INLINE
+# define UNUSED
+# define USED
+#endif
+
+#if USE_GNUC
+# define ALIGN_STRUCT(name)
+# define ALIGNOF_STRUCT(name) __alignof__ (struct name)
+#else
+# define ALIGN_STRUCT(name) struct align_##name { char c; struct name s; };
+# define ALIGNOF_STRUCT(name) offsetof (struct align_##name, s)
+#endif