diff options
Diffstat (limited to 'math.c')
-rw-r--r-- | math.c | 16 |
1 files changed, 16 insertions, 0 deletions
@@ -750,6 +750,22 @@ ruby_tgamma(const double d) #define tgamma(d) ruby_tgamma(d) #endif +#if defined __MINGW32__ || defined __APPLE__ +static inline double +ruby_lgamma_r(const double d, int *sign) +{ + const double g = lgamma_r(d, sign); + if (isinf(g)) { + if (d == 0.0 && signbit(d)) { + *sign = -1; + return INFINITY; + } + } + return g; +} +#define lgamma_r(d, sign) ruby_lgamma_r(d, sign) +#endif + /* * call-seq: * Math.gamma(x) -> Float |