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* configure.in: Check nextafter() availability.

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* include/ruby/missing.h (nextafter): New optional declaration.

* missing/nextafter.c: New file.

* numeric.c: Float#next_float and Float#prev_float implemented.

   [ruby-core:62562] [Feature #9834]



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45982 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
akr 2014-05-18 00:37:10 +00:00
parent ddd155842f
commit 63fee73500
12 changed files with 361 additions and 0 deletions
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36
ext/-test-/float/nextafter.c Normal file
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#include "ruby.h"
static VALUE
system_nextafter_m(VALUE klass, VALUE vx, VALUE vy)
{
double x, y, z;
x = NUM2DBL(vx);
y = NUM2DBL(vy);
z = nextafter(x, y);
return DBL2NUM(z);
}
#define nextafter missing_nextafter
#include "../../../missing/nextafter.c"
#undef nextafter
static VALUE
missing_nextafter_m(VALUE klass, VALUE vx, VALUE vy)
{
double x, y, z;
x = NUM2DBL(vx);
y = NUM2DBL(vy);
z = missing_nextafter(x, y);
return DBL2NUM(z);
}
void
Init_nextafter(VALUE klass)
{
rb_define_singleton_method(klass, "system_nextafter", system_nextafter_m, 2);
rb_define_singleton_method(klass, "missing_nextafter", missing_nextafter_m, 2);
}