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21991e6ca5
Assertions in header files slows down an interpreter, so they should be turned off by default (simple `make`). To enable them, define a macro `RUBY_DEBUG=1` (e.g. `make cppflags=-DRUBY_DEBUG` or use `#define` at the very beggining of the file. Note that even if `NDEBUG=1` is defined, `RUBY_DEBUG=1` enables all assertions. [Feature #16837] related: https://github.com/ruby/ruby/pull/3120 `assert()` lines in MRI *.c is not disabled even if `RUBY_DEBUG=0` and it can be disabled with `NDEBUG=1`. So please consider to use `RUBY_ASSERT()` if you want to disable them when `RUBY_DEBUG=0`.
59 lines
2.3 KiB
C++
59 lines
2.3 KiB
C++
#ifndef RBIMPL_ARITHMERIC_ST_DATA_T_H /*-*-C++-*-vi:se ft=cpp:*/
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#define RBIMPL_ARITHMERIC_ST_DATA_T_H
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/**
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* @file
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* @author Ruby developers <ruby-core@ruby-lang.org>
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* @copyright This file is a part of the programming language Ruby.
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* Permission is hereby granted, to either redistribute and/or
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* modify this file, provided that the conditions mentioned in the
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* file COPYING are met. Consult the file for details.
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* @warning Symbols prefixed with either `RBIMPL` or `rbimpl` are
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* implementation details. Don't take them as canon. They could
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* rapidly appear then vanish. The name (path) of this header file
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* is also an implementation detail. Do not expect it to persist
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* at the place it is now. Developers are free to move it anywhere
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* anytime at will.
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* @note To ruby-core: remember that this header can be possibly
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* recursively included from extension libraries written in C++.
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* Do not expect for instance `__VA_ARGS__` is always available.
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* We assume C99 for ruby itself but we don't assume languages of
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* extension libraries. They could be written in C++98.
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* @brief Arithmetic conversion between C's `st_data_t` and Ruby's.
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*/
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#include "ruby/internal/arithmetic/fixnum.h"
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#include "ruby/internal/arithmetic/long.h"
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#include "ruby/internal/attr/artificial.h"
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#include "ruby/internal/attr/const.h"
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#include "ruby/internal/attr/constexpr.h"
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#include "ruby/internal/cast.h"
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#include "ruby/internal/value.h"
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#include "ruby/assert.h"
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#include "ruby/st.h"
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#define ST2FIX RB_ST2FIX
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/** @cond INTERNAL_MACRO */
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#define RB_ST2FIX RB_ST2FIX
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/** @endcond */
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RBIMPL_ATTR_CONST_UNLESS_DEBUG()
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RBIMPL_ATTR_CONSTEXPR_UNLESS_DEBUG(CXX14)
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RBIMPL_ATTR_ARTIFICIAL()
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/* See also [ruby-core:84395] [Bug #14218] [ruby-core:82687] [Bug #13877] */
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static inline VALUE
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RB_ST2FIX(st_data_t i)
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{
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SIGNED_VALUE x = i;
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if (x >= 0) {
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x &= RUBY_FIXNUM_MAX;
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}
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else {
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x |= RUBY_FIXNUM_MIN;
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}
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RBIMPL_ASSERT_OR_ASSUME(RB_FIXABLE(x));
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unsigned long y = RBIMPL_CAST((unsigned long)x);
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return RB_LONG2FIX(y);
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}
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#endif /* RBIMPL_ARITHMERIC_ST_DATA_T_H */
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