clibs
Tiny but handy utility libraries for C
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clibs_math.h
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#ifndef CLIBS_CMATH_H
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#define CLIBS_CMATH_H
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#ifndef MAX
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#define MAX(a, b) ((a) > (b) ? (a) : (b))
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#endif
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#ifndef MIN
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#define MIN(a, b) ((a) < (b) ? (a) : (b))
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#endif
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#ifndef ABS
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#define ABS(a) ((a) > 0.0 ? (a) : -(a))
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#endif
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#ifndef IS_EQUAL
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#define IS_EQUAL(a, b, epsilon) (ABS((a) - (b)) <= (epsilon))
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#endif
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#ifndef COMPARE
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#define COMPARE(a, b) ((a) > (b) ? 1 : (a) == (b) ? 0 : -1)
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#endif
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#ifndef IS_EVEN
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#define IS_EVEN(n) (!((n) & 1))
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#endif
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#ifndef IS_ODD
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#define IS_ODD(n) ((n) & 1)
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#endif
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#ifndef SWAP
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#define SWAP(a, b) (((a) ^= (b)), ((b) ^= (a)), ((a) ^= (b)))
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#endif
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#ifndef RANDINT
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#define RANDINT(min, max) ((min) + rand() % ((max) - (min) + 1))
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#endif
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#ifndef INF
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#ifdef _MSC_VER
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#include <math.h>
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#define INF (-logf(0.0))
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#else
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#define INF (1.0 / 0.0)
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#endif
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#endif
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#ifndef IS_INF
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#ifdef _MSC_VER
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#include <math.h>
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#define IS_INF(n) (!_finite(n))
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#else
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#define IS_INF(n) ((n) > FLT_MAX)
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#endif
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#endif
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#ifndef NEG_INF
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#ifdef _MSC_VER
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#include <math.h>
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#define NEG_INF (logf(0.0))
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#else
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#define NEG_INF (-1.0 / 0.0)
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#endif
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#endif
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#ifndef IS_NEG_INF
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#ifdef _MSC_VER
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#include <math.h>
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#define IS_NEG_INF(n) (!_finite(n) && (n) < 0)
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#else
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#define IS_NEG_INF(n) (-(n) > FLT_MAX)
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#endif
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#endif
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#ifndef NaN
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#ifdef _MSC_VER
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#include <math.h>
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#define NaN (logf(0.0) - logf(0.0))
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#else
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#define NaN (0.0 / 0.0)
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#endif
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#endif
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#ifndef IS_NaN
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#define IS_NaN(n) \
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((n) > (n) ? 0 : \
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(n) == (n) ? 0 : \
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(n) < (n) ? 0 : 1)
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#endif
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#endif
/* CLIBS_CMATH_H */
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