#ifndef RBIMPL_ARITHMETIC_SHORT_H /*-*-C++-*-vi:se ft=cpp:*/
#define RBIMPL_ARITHMETIC_SHORT_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 `short` and Ruby's.
*
* Shyouhei wonders: why there is no SHORT2NUM, given there are both
* #USHORT2NUM and #CHR2FIX?
*/
#include "ruby/internal/value.h"
#include "ruby/internal/dllexport.h"
#include "ruby/internal/special_consts.h"
#define RB_NUM2SHORT rb_num2short_inline /**< @alias{rb_num2short_inline} */
#define RB_NUM2USHORT rb_num2ushort /**< @alias{rb_num2ushort} */
#define NUM2SHORT RB_NUM2SHORT /**< @old{RB_NUM2SHORT} */
#define NUM2USHORT RB_NUM2USHORT /**< @old{RB_NUM2USHORT} */
#define USHORT2NUM RB_INT2FIX /**< @old{RB_INT2FIX} */
#define RB_FIX2SHORT rb_fix2short /**< @alias{rb_fix2ushort} */
#define FIX2SHORT RB_FIX2SHORT /**< @old{RB_FIX2SHORT} */
RBIMPL_SYMBOL_EXPORT_BEGIN()
/**
* Converts an instance of ::rb_cNumeric into C's `short`.
*
* @param[in] num Something numeric.
* @exception rb_eTypeError `num` is not a numeric.
* @exception rb_eRangeError `num` is out of range of `short`.
* @return The passed value converted into C's `short`.
*/
short rb_num2short(VALUE num);
/**
* Converts an instance of ::rb_cNumeric into C's `unsigned short`.
*
* @param[in] num Something numeric.
* @exception rb_eTypeError `num` is not a numeric.
* @exception rb_eRangeError `num` is out of range of `unsigned short`.
* @return The passed value converted into C's `unsigned short`.
*/
unsigned short rb_num2ushort(VALUE num);
/**
* Identical to rb_num2short().
*
* @param[in] num Something numeric.
* @exception rb_eTypeError `num` is not a numeric.
* @exception rb_eRangeError `num` is out of range of `short`.
* @return The passed value converted into C's `short`.
*
* @internal
*
* This function seems to be a complete waste of disk space. @shyouhei has no
* idea why this is a different thing from rb_num2short().
*/
short rb_fix2short(VALUE num);
/**
* Identical to rb_num2ushort().
*
* @param[in] num Something numeric.
* @exception rb_eTypeError `num` is not a numeric.
* @exception rb_eRangeError `num` is out of range of `unsigned short`.
* @return The passed value converted into C's `unsigned short`.
*
* @internal
*
* This function seems to be a complete waste of disk space. @shyouhei has no
* idea why this is a different thing from rb_num2ushort().
*/
unsigned short rb_fix2ushort(VALUE num);
RBIMPL_SYMBOL_EXPORT_END()
/**
* Identical to rb_num2short().
*
* @param[in] x Something numeric.
* @exception rb_eTypeError `x` is not a numeric.
* @exception rb_eRangeError `x` is out of range of `short`.
* @return The passed value converted into C's `short`.
*
* @internal
*
* This function seems to be a complete waste of time. @shyouhei has no idea
* why this is a different thing from rb_num2short().
*/
static inline short
rb_num2short_inline(VALUE x)
{
if (RB_FIXNUM_P(x))
return rb_fix2short(x);
else
return rb_num2short(x);
}
#endif /* RBIMPL_ARITHMETIC_SHORT_H */
|