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| -rw-r--r-- | ChangeLog | 5 | ||||
| -rw-r--r-- | missing/acosh.c | 9 |
2 files changed, 14 insertions, 0 deletions
@@ -1,3 +1,8 @@ +Thu Jun 19 16:49:36 2008 NAKAMURA Usaku <usa@ruby-lang.org> + + * missing/acosh.c (atanh): should set ERANGE to errno if parameter + is the boundary case. fixed [ruby-dev:35155] + Thu Jun 19 16:06:01 2008 Hidetoshi NAGAI <nagai@ai.kyutech.ac.jp> * ext/tk/lib/tkextlib/tile/treeview.rb: cannot configure tags. diff --git a/missing/acosh.c b/missing/acosh.c index 41add2e4b6..c6695b599e 100644 --- a/missing/acosh.c +++ b/missing/acosh.c @@ -12,6 +12,7 @@ #include <errno.h> #include <float.h> #include <math.h> +#include "ruby.h" /* DBL_MANT_DIG must be less than 4 times of bits of int */ #ifndef DBL_MANT_DIG @@ -79,6 +80,14 @@ atanh(double x) if (z < SMALL_CRITERIA) return x; z = log(z > 1 ? -1 : (1 + z) / (1 - z)) / 2; if (neg) z = -z; + if (isinf(z)) +#if defined(ERANGE) + errno = ERANGE; +#elif defined(EDOM) + errno = EDOM; +#else + ; +#endif return z; } #endif |