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#ifndef RBIMPL_ARITHMETIC_DOUBLE_H /*-*-C++-*-vi:se ft=cpp:*/ #define RBIMPL_ARITHMETIC_DOUBLE_H /** * @file * @author Ruby developers * @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 */