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Define INFINITY and NAN when missing

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This commit is contained in:
James Myatt
2015-02-05 15:56:49 +00:00
parent 0137103f4b
commit 72310c87a5
1 changed files with 9 additions and 6 deletions
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15
math_compat.h
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@@ -1,7 +1,7 @@
#ifndef __math_compat_h #ifndef __math_compat_h
#define __math_compat_h #define __math_compat_h
/* Define isnan and isinf on Windows/MSVC */ /* Define isnan, isinf, infinity and nan on Windows/MSVC */
#ifndef HAVE_DECL_ISNAN #ifndef HAVE_DECL_ISNAN
# ifdef HAVE_DECL__ISNAN # ifdef HAVE_DECL__ISNAN
@@ -17,12 +17,15 @@
# endif # endif
#endif #endif
#ifndef HAVE_DECL_NAN
#error This platform does not have nan()
#endif
#ifndef HAVE_DECL_INFINITY #ifndef HAVE_DECL_INFINITY
#error This platform does not have INFINITY #include <float.h>
#define INFINITY (DBL_MAX + DBL_MAX)
#define HAVE_DECL_INFINITY
#endif
#ifndef HAVE_DECL_NAN
#define NAN (INFINITY - INFINITY)
#define HAVE_DECL_NAN
#endif #endif
#endif #endif