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* numeric.c: Document Float constants [ruby-core:51484] [Bug #7709]

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git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@39024 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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zzak 2013-02-03 00:59:51 +00:00
parent 9ed4d1ab8c
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ChangeLog
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@ -1,3 +1,7 @@
Sun Feb 3 10:00:00 2013 Zachary Scott <zachary@zacharyscott.net>
* numeric.c: Document Float constants [ruby-core:51484] [Bug #7709]
Sun Feb 3 09:38:44 2013 Nobuyoshi Nakada <nobu@ruby-lang.org>
* lib/profiler.rb (PROFILE_CALL_PROC, PROFILE_RETURN_PROC): add b_call

75
numeric.c
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@ -3830,18 +3830,93 @@ Init_Numeric(void)
rb_undef_alloc_func(rb_cFloat);
rb_undef_method(CLASS_OF(rb_cFloat), "new");
/*
* Represents the rounding mode for floating point addition.
*
* Usually defaults to 1, rounding to the nearest number.
*
* Other modes include:
*
* -1:: Indeterminable
* 0:: Rounding towards zero
* 1:: Rounding to the nearest number
* 2:: Rounding towards positive infinity
* 3:: Rounding towards negative infinity
*/
rb_define_const(rb_cFloat, "ROUNDS", INT2FIX(FLT_ROUNDS));
/*
* The base of the floating point, or number of unique digits used to
* represent the number.
*
* Usually defaults to 2 on most systems, which would represent a base-10 decimal.
*/
rb_define_const(rb_cFloat, "RADIX", INT2FIX(FLT_RADIX));
/*
* The number of base digits for the +double+ data type.
*
* Usually defaults to 53.
*/
rb_define_const(rb_cFloat, "MANT_DIG", INT2FIX(DBL_MANT_DIG));
/*
* The number of decimal digits in a double-precision floating point.
*
* Usually defaults to 15.
*/
rb_define_const(rb_cFloat, "DIG", INT2FIX(DBL_DIG));
/*
* The smallest posable exponent value in a double-precision floating
* point.
*
* Usually defaults to -1021.
*/
rb_define_const(rb_cFloat, "MIN_EXP", INT2FIX(DBL_MIN_EXP));
/*
* The largest possible exponent value in a double-precision floating
* point.
*
* Usually defaults to 1024.
*/
rb_define_const(rb_cFloat, "MAX_EXP", INT2FIX(DBL_MAX_EXP));
/*
* The smallest negative exponent in a double-precision floating point
* where 10 raised to this power minus 1.
*
* Usually defaults to -307.
*/
rb_define_const(rb_cFloat, "MIN_10_EXP", INT2FIX(DBL_MIN_10_EXP));
/*
* The largest positive exponent in a double-precision floating point where
* 10 raised to this power minus 1.
*
* Usually defaults to 308.
*/
rb_define_const(rb_cFloat, "MAX_10_EXP", INT2FIX(DBL_MAX_10_EXP));
/*
* The smallest positive integer in a double-precision floating point.
*
* Usually defaults to 2.2250738585072014e-308.
*/
rb_define_const(rb_cFloat, "MIN", DBL2NUM(DBL_MIN));
/*
* The largest possible integer in a double-precision floating point number.
*
* Usually defaults to 1.7976931348623157e+308.
*/
rb_define_const(rb_cFloat, "MAX", DBL2NUM(DBL_MAX));
/*
* The difference between 1 and the smallest double-precision floating
* point number.
*
* Usually defaults to 2.2204460492503131e-16.
*/
rb_define_const(rb_cFloat, "EPSILON", DBL2NUM(DBL_EPSILON));
/*
* An expression representing positive infinity.
*/
rb_define_const(rb_cFloat, "INFINITY", DBL2NUM(INFINITY));
/*
* An expression representing a value which is "not a number".
*/
rb_define_const(rb_cFloat, "NAN", DBL2NUM(NAN));
rb_define_method(rb_cFloat, "to_s", flo_to_s, 0);