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| -rw-r--r-- | ChangeLog | 8 | ||||
| -rw-r--r-- | math.c | 7 |
2 files changed, 15 insertions, 0 deletions
@@ -1,3 +1,11 @@ +Thu Feb 18 22:31:15 2010 Yusuke Endoh <mame@tsg.ne.jp> + + * math.c (math_atanh): raise ERANGE without calling atanh if absolute + value is 1 to achieve platform-independent math. [ruby-core:28219] + + * math.c (math_lgamma): return [Infinity, 1] without calling lgamma_r + if argument is infinity or -infinity. [ruby-core:28219] + Thu Feb 18 22:28:00 2010 Kenta Murata <mrkn@mrkn.jp> * confiure.in: new --with-ext and --with-out-ext options for extmk. @@ -310,6 +310,10 @@ math_atanh(VALUE obj, VALUE x) Need_Float(x); errno = 0; d0 = RFLOAT_VALUE(x); + if (d0 == 1.0 || d0 == -1.0) { + errno = ERANGE; + rb_sys_fail("atanh"); + } d = atanh(d0); domain_check(d0, d, "atanh"); infinity_check(x, d, "atanh"); @@ -715,6 +719,9 @@ math_lgamma(VALUE obj, VALUE x) Need_Float(x); errno = 0; d0 = RFLOAT_VALUE(x); + if (isinf(d0)) { + return rb_assoc_new(DBL2NUM(INFINITY), INT2FIX(1)); + } d = lgamma_r(d0, &sign); domain_check(d0, d, "lgamma"); v = DBL2NUM(d); |