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#ifndef RBIMPL_ARITHMETIC_DOUBLE_H /*-*-C++-*-vi:se ft=cpp:*/
#define RBIMPL_ARITHMETIC_DOUBLE_H
/**
* @file
* @author Ruby developers <ruby-core@ruby-lang.org>
* @copyright This file is a part of the programming language Ruby.
* Permission is hereby granted, to either redistribute and/or
* modify this file, provided that the conditions mentioned in the
* file COPYING are met. Consult the file for details.
* @warning Symbols prefixed with either `RBIMPL` or `rbimpl` are
* implementation details. Don't take them as canon. They could
* rapidly appear then vanish. The name (path) of this header file
* is also an implementation detail. Do not expect it to persist
* at the place it is now. Developers are free to move it anywhere
* anytime at will.
* @note To ruby-core: remember that this header can be possibly
* recursively included from extension libraries written in C++.
* Do not expect for instance `__VA_ARGS__` is always available.
* We assume C99 for ruby itself but we don't assume languages of
* extension libraries. They could be written in C++98.
* @brief Arithmetic conversion between C's `double` and Ruby's.
*/
#include "ruby/internal/attr/pure.h"
#include "ruby/internal/dllexport.h"
#include "ruby/internal/value.h"
#define NUM2DBL rb_num2dbl /**< @old{rb_num2dbl} */
#define RFLOAT_VALUE rb_float_value /**< @old{rb_float_value} */
#define DBL2NUM rb_float_new /**< @old{rb_float_new} */
RBIMPL_SYMBOL_EXPORT_BEGIN()
/**
* Converts an instance of ::rb_cNumeric into C's `double`.
*
* @param[in] num Something numeric.
* @exception rb_eTypeError `num` is not a numeric.
* @return The passed value converted into C's `double`.
*/
double rb_num2dbl(VALUE num);
RBIMPL_ATTR_PURE()
/**
* Extracts its double value from an instance of ::rb_cFloat.
*
* @param[in] num An instance of ::rb_cFloat.
* @pre Must not pass anything other than a Fixnum.
* @return The passed value converted into C's `double`.
*/
double rb_float_value(VALUE num);
/**
* Converts a C's `double` into an instance of ::rb_cFloat.
*
* @param[in] d Arbitrary `double` value.
* @return An instance of ::rb_cFloat.
*/
VALUE rb_float_new(double d);
/**
* Identical to rb_float_new(), except it does not generate Flonums.
*
* @param[in] d Arbitrary `double` value.
* @return An instance of ::rb_cFloat.
*
* @internal
*
* @shyouhei has no idea why it is here.
*/
VALUE rb_float_new_in_heap(double d);
RBIMPL_SYMBOL_EXPORT_END()
#endif /* RBIMPL_ARITHMETIC_DOUBLE_H */
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