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/*
* Fundamental C definitions.
*/
#ifndef UTIL_LINUX_C_H
#define UTIL_LINUX_C_H
#include <limits.h>
/*
* Compiler specific stuff
*/
#ifdef __GNUC__
/* &a[0] degrades to a pointer: a different type from an array */
# define __must_be_array(a) \
BUILD_BUG_ON_ZERO(__builtin_types_compatible_p(typeof(a), typeof(&a[0])))
#else /* !__GNUC__ */
# define __must_be_array(a) 0
# define __attribute__(_arg_)
#endif /* !__GNUC__ */
/* Force a compilation error if condition is true, but also produce a
* result (of value 0 and type size_t), so the expression can be used
* e.g. in a structure initializer (or where-ever else comma expressions
* aren't permitted).
*/
#define BUILD_BUG_ON_ZERO(e) (sizeof(struct { int:-!!(e); }))
#define BUILD_BUG_ON_NULL(e) ((void *)sizeof(struct { int:-!!(e); }))
#ifndef ARRAY_SIZE
# define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr))
#endif
#ifndef PATH_MAX
# define PATH_MAX 4096
#endif
#ifndef TRUE
# define TRUE 1
#endif
#ifndef FALSE
# define FALSE 0
#endif
#define min(x, y) ({ \
typeof(x) _min1 = (x); \
typeof(y) _min2 = (y); \
(void) (&_min1 == &_min2); \
_min1 < _min2 ? _min1 : _min2; })
#define max(x, y) ({ \
typeof(x) _max1 = (x); \
typeof(y) _max2 = (y); \
(void) (&_max1 == &_max2); \
_max1 > _max2 ? _max1 : _max2; })
#endif /* UTIL_LINUX_C_H */
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