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* ratioanl.c (float_rationalize): reduced.

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git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38407 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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tadf 2012-12-15 09:01:22 +00:00
parent 985fe77356
commit 81af1bd9e8
2 changed files with 22 additions and 10 deletions
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4
ChangeLog
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@ -1,3 +1,7 @@
Sat Dec 15 18:00:00 2012 Tadayoshi Funaba <tadf@dotrb.org>
* ratioanl.c (float_rationalize): reduced.
Sat Dec 15 14:18:44 2012 KOSAKI Motohiro <kosaki.motohiro@gmail.com>
* io.c (finish_writeconv): uses rb_write_internal2 if

28
rational.c
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@ -1935,17 +1935,25 @@ float_rationalize(int argc, VALUE *argv, VALUE self)
return rb_rational_new1(f_lshift(f, n));
#if FLT_RADIX == 2
a = rb_rational_new2(f_sub(f_mul(TWO, f), ONE),
f_lshift(ONE, f_sub(ONE, n)));
b = rb_rational_new2(f_add(f_mul(TWO, f), ONE),
f_lshift(ONE, f_sub(ONE, n)));
{
VALUE two_times_f, den;
two_times_f = f_mul(TWO, f);
den = f_lshift(ONE, f_sub(ONE, n));
a = rb_rational_new2(f_sub(two_times_f, ONE), den);
b = rb_rational_new2(f_add(two_times_f, ONE), den);
}
#else
a = rb_rational_new2(f_sub(f_mul(INT2FIX(FLT_RADIX), f),
INT2FIX(FLT_RADIX - 1)),
f_expt(INT2FIX(FLT_RADIX), f_sub(ONE, n)));
b = rb_rational_new2(f_add(f_mul(INT2FIX(FLT_RADIX), f),
INT2FIX(FLT_RADIX - 1)),
f_expt(INT2FIX(FLT_RADIX), f_sub(ONE, n)));
{
VALUE radix_times_f, den;
radix_times_f = f_mul(INT2FIX(FLT_RADIX), f);
den = f_expt(INT2FIX(FLT_RADIX), f_sub(ONE, n));
a = rb_rational_new2(f_sub(radix_times_f, INT2FIX(FLT_RADIX - 1)), den);
b = rb_rational_new2(f_add(radix_times_f, INT2FIX(FLT_RADIX - 1)), den);
}
#endif
}