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/* CC0 (Public domain) - see LICENSE file for details */
#ifndef CCAN_MINMAX_H
#define CCAN_MINMAX_H
#include "config.h"
#include <ccan/build_assert/build_assert.h>
#if !HAVE_STATEMENT_EXPR || !HAVE_TYPEOF
/*
* Without these, there's no way to avoid unsafe double evaluation of
* the arguments
*/
#error Sorry, minmax module requires statement expressions and typeof
#endif
#if HAVE_BUILTIN_TYPES_COMPATIBLE_P
#define MINMAX_ASSERT_COMPATIBLE(a, b) \
BUILD_ASSERT(__builtin_types_compatible_p(a, b))
#else
#define MINMAX_ASSERT_COMPATIBLE(a, b) \
do { } while (0)
#endif
#define min(a, b) \
({ \
typeof(a) _a = (a); \
typeof(b) _b = (b); \
MINMAX_ASSERT_COMPATIBLE(typeof(_a), typeof(_b)); \
_a < _b ? _a : _b; \
})
#define max(a, b) \
({ \
typeof(a) _a = (a); \
typeof(b) _b = (b); \
MINMAX_ASSERT_COMPATIBLE(typeof(_a), typeof(_b)); \
_a > _b ? _a : _b; \
})
#define clamp(v, f, c) (max(min((v), (c)), (f)))
#define min_t(t, a, b) \
({ \
t _ta = (a); \
t _tb = (b); \
min(_ta, _tb); \
})
#define max_t(t, a, b) \
({ \
t _ta = (a); \
t _tb = (b); \
max(_ta, _tb); \
})
#define clamp_t(t, v, f, c) \
({ \
t _tv = (v); \
t _tf = (f); \
t _tc = (c); \
clamp(_tv, _tf, _tc); \
})
#endif /* CCAN_MINMAX_H */
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