52 lines
1.0 KiB
C
52 lines
1.0 KiB
C
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#ifndef FPUTIL_H
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#define FPUTIL_H
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/*--------------------------------------------------------------------*/
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#include <math.h>
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#ifdef __STDC_VERSION__
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#if __STDC_VERSION__ >= 199901L
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#define C99
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#endif
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#endif
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/*--------------------------------------------------------------------*/
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#if defined C99
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/* (empty) */
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#elif defined _MSC_VER
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#include <float.h>
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#define isfinite _finite
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#define isnan _isnan
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#define INFINITY HUGE_VAL
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#elif defined LINUX
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# ifndef isfinite
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# define isfinite finite
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# endif
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# ifndef isnan
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# define isnan isnan
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# endif
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# ifndef INFINITY
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# define INFINITY HUGE_VAL
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# endif
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#elif defined DARWIN
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/* (empty) */
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#else
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#define isfinite(x) (0.0 * (x) != 0.0)
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#define isnan(x) ((x) != (x))
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#define INFINITY HUGE_VAL
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#endif
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#define SNAN fputil_snan()
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#define QNAN fputil_qnan()
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/*--------------------------------------------------------------------*/
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double fputil_snan(void);
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double fputil_qnan(void);
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/*--------------------------------------------------------------------*/
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#endif /* FPUTIL_H */
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