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Diffstat (limited to 'include/ruby/3/arithmetic/st_data_t.h')
| -rw-r--r-- | include/ruby/3/arithmetic/st_data_t.h | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/include/ruby/3/arithmetic/st_data_t.h b/include/ruby/3/arithmetic/st_data_t.h new file mode 100644 index 0000000000..a4917a42f4 --- /dev/null +++ b/include/ruby/3/arithmetic/st_data_t.h @@ -0,0 +1,59 @@ +/** \noop-*-C++-*-vi:ft=cpp + * @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 `RUBY3` or `ruby3` 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 `st_data_t` and Ruby's. + */ +#ifndef RUBY3_ARITHMERIC_ST_DATA_T_H +#define RUBY3_ARITHMERIC_ST_DATA_T_H +#include "ruby/3/arithmetic/fixnum.h" +#include "ruby/3/arithmetic/long.h" +#include "ruby/3/attr/artificial.h" +#include "ruby/3/attr/const.h" +#include "ruby/3/attr/constexpr.h" +#include "ruby/3/cast.h" +#include "ruby/3/value.h" +#include "ruby/assert.h" +#include "ruby/st.h" + +#define ST2FIX RB_ST2FIX +/** @cond INTERNAL_MACRO */ +#define RB_ST2FIX RB_ST2FIX +/** @endcond */ + +RUBY3_ATTR_CONST_ON_NDEBUG() +RUBY3_ATTR_CONSTEXPR_ON_NDEBUG(CXX14) +RUBY3_ATTR_ARTIFICIAL() +/* See also [ruby-core:84395] [Bug #14218] [ruby-core:82687] [Bug #13877] */ +static inline VALUE +RB_ST2FIX(st_data_t i) +{ + SIGNED_VALUE x = i; + + if (x >= 0) { + x &= RUBY_FIXNUM_MAX; + } + else { + x |= RUBY_FIXNUM_MIN; + } + + RUBY3_ASSERT_OR_ASSUME(RB_FIXABLE(x)); + unsigned long y = RUBY3_CAST((unsigned long)x); + return RB_LONG2FIX(y); +} + +#endif /* RUBY3_ARITHMERIC_ST_DATA_T_H */ |