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Düzenlenen Dosya: value.h

#ifndef RBIMPL_VALUE_H /*-*-C++-*-vi:se ft=cpp:*/ #define RBIMPL_VALUE_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 Defines ::VALUE and ::ID. */ #include "ruby/internal/static_assert.h" #include "ruby/backward/2/long_long.h" #include "ruby/backward/2/limits.h" #if defined(__DOXYGEN__) /** * Type that represents a Ruby object. It is an unsigned integer of some kind, * depending on platforms. * * ```CXX * VALUE value = rb_eval_string("ARGF.readlines.map.with_index"); * ``` * * @warning ::VALUE is not a pointer. * @warning ::VALUE can be wider than `long`. */ typedef uintptr_t VALUE; /** * Type that represents a Ruby identifier such as a variable name. * * ```CXX * ID method = rb_intern("method"); * VALUE result = rb_funcall(obj, method, 0); * ``` * * @note ::rb_cSymbol is a Ruby-level data type for the same thing. */ typedef uintptr_t ID; /** * A signed integer type that has the same width with ::VALUE. * * @internal * * @shyouhei wonders: is it guaranteed that `uintptr_t` and `intptr_t` are the * same width? As far as I read ISO/IEC 9899:2018 section 7.20.1.4 paragraph 1 * no such description is given... or defined elsewhere? */ typedef intptr_t SIGNED_VALUE; /** * Identical to `sizeof(VALUE)`, except it is a macro that can also be used * inside of preprocessor directives such as `#if`. Handy on occasions. */ #define SIZEOF_VALUE SIZEOF_UINTPTR_T /** * @private * * A compile-time constant of type ::VALUE whose value is 0. */ #define RBIMPL_VALUE_NULL UINTPTR_C(0) /** * @private * * A compile-time constant of type ::VALUE whose value is 1. */ #define RBIMPL_VALUE_ONE UINTPTR_C(1) /** * @private * * Maximum possible value that a ::VALUE can take. */ #define RBIMPL_VALUE_FULL UINTPTR_MAX #elif defined HAVE_UINTPTR_T && 0 typedef uintptr_t VALUE; typedef uintptr_t ID; # define SIGNED_VALUE intptr_t # define SIZEOF_VALUE SIZEOF_UINTPTR_T # undef PRI_VALUE_PREFIX # define RBIMPL_VALUE_NULL UINTPTR_C(0) # define RBIMPL_VALUE_ONE UINTPTR_C(1) # define RBIMPL_VALUE_FULL UINTPTR_MAX #elif SIZEOF_LONG == SIZEOF_VOIDP typedef unsigned long VALUE; typedef unsigned long ID; # define SIGNED_VALUE long # define SIZEOF_VALUE SIZEOF_LONG # define PRI_VALUE_PREFIX "l" # define RBIMPL_VALUE_NULL 0UL # define RBIMPL_VALUE_ONE 1UL # define RBIMPL_VALUE_FULL ULONG_MAX #elif SIZEOF_LONG_LONG == SIZEOF_VOIDP typedef unsigned LONG_LONG VALUE; typedef unsigned LONG_LONG ID; # define SIGNED_VALUE LONG_LONG # define LONG_LONG_VALUE 1 # define SIZEOF_VALUE SIZEOF_LONG_LONG # define PRI_VALUE_PREFIX PRI_LL_PREFIX # define RBIMPL_VALUE_NULL 0ULL # define RBIMPL_VALUE_ONE 1ULL # define RBIMPL_VALUE_FULL ULLONG_MAX #else # error ---->> ruby requires sizeof(void*) == sizeof(long) or sizeof(LONG_LONG) to be compiled. <<---- #endif /** @cond INTERNAL_MACRO */ RBIMPL_STATIC_ASSERT(sizeof_int, SIZEOF_INT == sizeof(int)); RBIMPL_STATIC_ASSERT(sizeof_long, SIZEOF_LONG == sizeof(long)); RBIMPL_STATIC_ASSERT(sizeof_long_long, SIZEOF_LONG_LONG == sizeof(LONG_LONG)); RBIMPL_STATIC_ASSERT(sizeof_voidp, SIZEOF_VOIDP == sizeof(void *)); /** @endcond */ #endif /* RBIMPL_VALUE_H */
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