Add Float::INFINITY and Float::NAN.

* numeric.c (Init_Numeric): Add Float::INFINITY and Float::NAN.
  [ruby-dev:1657] [ruby-dev:4760] [ruby-list:7023] [ruby-list:46690]
  [ruby-core:26632] [ruby-talk:41352] [ruby-talk:203333]

* include/ruby/defines.h (INFINITY): defined.

* include/ruby/defines.h (NAN): defined.

* include/ruby/util.h (ruby_div0): removed.

* numeric.c (fix_pow): use INFINITY and NAN instead of ruby_div0(1.0).

* marshal.c (r_object0): ditto.

* bignum.c (big_fdiv): ditto.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@26197 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 18 insertions, 4 deletions

diff --git a/numeric.c b/numeric.c
index 11d67fef5d..319f7b2c48 100644
--- a/numeric.c
+++ b/numeric.c
@@ -63,6 +63,20 @@
 #define DBL_EPSILON 2.2204460492503131e-16
 #endif
 
+#ifdef HAVE_INFINITY
+#elif BYTE_ORDER == LITTLE_ENDIAN
+const unsigned char rb_infinity[] = "\x00\x00\x00\x00\x00\x00\xf0\x7f";
+#else
+const unsigned char rb_infinity[] = "\x7f\xf0\x00\x00\x00\x00\x00\x00";
+#endif
+
+#ifdef HAVE_NAN
+#elif BYTE_ORDER == LITTLE_ENDIAN
+const unsigned char rb_nan[] = "\x00\x00\x00\x00\x00\x00\xf8\x7f";
+#else
+const unsigned char rb_nan[] = "\x7f\xf8\x00\x00\x00\x00\x00\x00";
+#endif
+
 extern double round(double);
 
 #ifndef HAVE_ROUND
@@ -2467,8 +2481,6 @@ int_pow(long x, unsigned long y)
     return LONG2NUM(z);
 }
 
-#define infinite_value() ruby_div0(1.0)
-
 /*
  *  call-seq:
  *    fix ** numeric  ->  numeric_result
@@ -2496,7 +2508,7 @@ fix_pow(VALUE x, VALUE y)
 	if (b == 1) return x;
 	if (a == 0) {
 	    if (b > 0) return INT2FIX(0);
-	    return DBL2NUM(infinite_value());
+	    return DBL2NUM(INFINITY);
 	}
 	if (a == 1) return INT2FIX(1);
 	if (a == -1) {
@@ -2524,7 +2536,7 @@ fix_pow(VALUE x, VALUE y)
       case T_FLOAT:
 	if (RFLOAT_VALUE(y) == 0.0) return DBL2NUM(1.0);
 	if (a == 0) {
-	    return DBL2NUM(RFLOAT_VALUE(y) < 0 ? infinite_value() : 0.0);
+	    return DBL2NUM(RFLOAT_VALUE(y) < 0 ? INFINITY : 0.0);
 	}
 	if (a == 1) return DBL2NUM(1.0);
 	{
@@ -3305,6 +3317,8 @@ Init_Numeric(void)
     rb_define_const(rb_cFloat, "MIN", DBL2NUM(DBL_MIN));
     rb_define_const(rb_cFloat, "MAX", DBL2NUM(DBL_MAX));
     rb_define_const(rb_cFloat, "EPSILON", DBL2NUM(DBL_EPSILON));
+    rb_define_const(rb_cFloat, "INFINITY", DBL2NUM(INFINITY));
+    rb_define_const(rb_cFloat, "NAN", DBL2NUM(NAN));
 
     rb_define_method(rb_cFloat, "to_s", flo_to_s, 0);
     rb_define_method(rb_cFloat, "coerce", flo_coerce, 1);