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Diffstat (limited to 'parser_value.h')
-rw-r--r-- | parser_value.h | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/parser_value.h b/parser_value.h new file mode 100644 index 0000000000..4fe444e82f --- /dev/null +++ b/parser_value.h @@ -0,0 +1,106 @@ +#ifndef EXTERNAL_VALUE_H +#define EXTERNAL_VALUE_H + +#include "ruby/config.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 + +#endif /* EXTERNAL_VALUE_H */ |