annotate maths/nan-inf.h @ 317:f51af910550f
* Sort out this isnan/isinf nonsense once and for all
| author |
Chris Cannam <c.cannam@qmul.ac.uk> |
| date |
Wed, 09 Feb 2011 15:25:36 +0000 |
| parents |
702ff8c08137 |
| children |
701233f8ed41 |
| rev |
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1
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2 #ifndef NAN_INF_H
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3 #define NAN_INF_H
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4
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5 #define ISNAN(x) (sizeof(x) == sizeof(double) ? ISNANd(x) : ISNANf(x))
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6 static inline int ISNANf(float x) { return x != x; }
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7 static inline int ISNANd(double x) { return x != x; }
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8
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9 #define ISINF(x) (sizeof(x) == sizeof(double) ? ISINFd(x) : ISINFf(x))
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10 static inline int ISINFf(float x) { return !ISNANf(x) && ISNANf(x - x); }
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11 static inline int ISINFd(double x) { return !ISNANd(x) && ISNANd(x - x); }
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12
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13 #endif
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