diff options
Diffstat (limited to 'missing/isnan.c')
-rw-r--r-- | missing/isnan.c | 32 |
1 files changed, 0 insertions, 32 deletions
diff --git a/missing/isnan.c b/missing/isnan.c deleted file mode 100644 index ed10bf5cd6..0000000000 --- a/missing/isnan.c +++ /dev/null @@ -1,32 +0,0 @@ -/* public domain rewrite of isnan(3) */ - -#include "ruby/missing.h" - -/* - * isnan() may be a macro, a function or both. - * (The C99 standard defines that isnan() is a macro, though.) - * http://www.gnu.org/software/automake/manual/autoconf/Function-Portability.html - * - * macro only: uClibc - * both: GNU libc - * - * This file is compile if no isnan() function is available. - * (autoconf AC_REPLACE_FUNCS detects only the function.) - * The macro is detected by following #ifndef. - */ - -#ifndef isnan -static int double_ne(double n1, double n2); - -int -isnan(double n) -{ - return double_ne(n, n); -} - -static int -double_ne(double n1, double n2) -{ - return n1 != n2; -} -#endif |