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