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If isinf() is not available on a target platform, use our own imlementation via finite() and isnan(). If either of the last two is not available as well, use simple replacements which are platform-neutral, but slower than compiler intrinsics.

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2007-04-29 16:57:17 +04:00
parent 024dbd231a
commit b42eb01e58
1 changed files with 9 additions and 2 deletions
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11
include/my_global.h
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@@ -784,13 +784,20 @@ typedef SOCKET_SIZE_TYPE size_socket;
#define SSIZE_MAX ((~((size_t) 0)) / 2)
#endif
#ifndef HAVE_FINITE
#define finite(x) (1.0 / fabs(x) > 0.0)
#endif
#ifndef HAVE_ISNAN
#define isnan(x) ((x) != (x))
#endif
#if !defined(HAVE_ISINF)
/* The configure check for "isinf with math.h" has failed */
#ifdef isinf
#undef isinf
#endif
/* Define isinf to never say that X is infinite */
#define isinf(X) 0
#define isinf(X) (!finite(X) && !isnan(X))
#endif
/* Define missing math constants. */