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internal.h
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/**********************************************************************
internal.h -
$Author$
created at: Tue May 17 11:42:20 JST 2011
Copyright (C) 2011 Yukihiro Matsumoto
**********************************************************************/
#ifndef RUBY_INTERNAL_H
#define RUBY_INTERNAL_H 1
#include "ruby.h"
#if defined(__cplusplus)
extern "C" {
#if 0
} /* satisfy cc-mode */
#endif
#endif
#ifdef HAVE_STDBOOL_H
# include <stdbool.h>
#else
# include "missing/stdbool.h"
#endif
/* The most significant bit of the lower part of half-long integer.
* If sizeof(long) == 4, this is 0x8000.
* If sizeof(long) == 8, this is 0x80000000.
*/
#define HALF_LONG_MSB ((SIGNED_VALUE)1<<((SIZEOF_LONG*CHAR_BIT-1)/2))
#define LIKELY(x) RB_LIKELY(x)
#define UNLIKELY(x) RB_UNLIKELY(x)
#ifndef MAYBE_UNUSED
# define MAYBE_UNUSED(x) x
#endif
#ifndef WARN_UNUSED_RESULT
# define WARN_UNUSED_RESULT(x) x
#endif
#ifndef __has_feature
# define __has_feature(x) 0
#endif
#ifndef __has_extension
# define __has_extension __has_feature
#endif
#if 0
#elif defined(NO_SANITIZE) && __has_feature(memory_sanitizer)
# define ATTRIBUTE_NO_ADDRESS_SAFETY_ANALYSIS(x) \
NO_SANITIZE("memory", NO_SANITIZE("address", NOINLINE(x)))
#elif defined(NO_SANITIZE)
# define ATTRIBUTE_NO_ADDRESS_SAFETY_ANALYSIS(x) \
NO_SANITIZE("address", NOINLINE(x))
#elif defined(NO_SANITIZE_ADDRESS)
# define ATTRIBUTE_NO_ADDRESS_SAFETY_ANALYSIS(x) \
NO_SANITIZE_ADDRESS(NOINLINE(x))
#elif defined(NO_ADDRESS_SAFETY_ANALYSIS)
# define ATTRIBUTE_NO_ADDRESS_SAFETY_ANALYSIS(x) \
NO_ADDRESS_SAFETY_ANALYSIS(NOINLINE(x))
#else
# define ATTRIBUTE_NO_ADDRESS_SAFETY_ANALYSIS(x) x
#endif
#if defined(NO_SANITIZE) && defined(__GNUC__) &&! defined(__clang__)
/* GCC warns about unknown sanitizer, which is annoying. */
#undef NO_SANITIZE
#define NO_SANITIZE(x, y) \
COMPILER_WARNING_PUSH; \
COMPILER_WARNING_IGNORED(-Wattributes); \
__attribute__((__no_sanitize__(x))) y; \
COMPILER_WARNING_POP
#endif
#ifndef NO_SANITIZE
# define NO_SANITIZE(x, y) y
#endif
#ifdef HAVE_VALGRIND_MEMCHECK_H
# include <valgrind/memcheck.h>
# ifndef VALGRIND_MAKE_MEM_DEFINED
# define VALGRIND_MAKE_MEM_DEFINED(p, n) VALGRIND_MAKE_READABLE((p), (n))
# endif
# ifndef VALGRIND_MAKE_MEM_UNDEFINED
# define VALGRIND_MAKE_MEM_UNDEFINED(p, n) VALGRIND_MAKE_WRITABLE((p), (n))
# endif
#else
# define VALGRIND_MAKE_MEM_DEFINED(p, n) 0
# define VALGRIND_MAKE_MEM_UNDEFINED(p, n) 0
#endif
#define numberof(array) ((int)(sizeof(array) / sizeof((array)[0])))
#ifndef MJIT_HEADER
#ifdef HAVE_SANITIZER_ASAN_INTERFACE_H
# include <sanitizer/asan_interface.h>
#endif
#if !__has_feature(address_sanitizer)
# define __asan_poison_memory_region(x, y)
# define __asan_unpoison_memory_region(x, y)
# define __asan_region_is_poisoned(x, y) 0
#endif
#ifdef HAVE_SANITIZER_MSAN_INTERFACE_H
# if __has_feature(memory_sanitizer)
# include <sanitizer/msan_interface.h>
# endif
#endif
#if !__has_feature(memory_sanitizer)
# define __msan_allocated_memory(x, y) ((void)(x), (void)(y))
# define __msan_poison(x, y) ((void)(x), (void)(y))
# define __msan_unpoison(x, y) ((void)(x), (void)(y))
# define __msan_unpoison_string(x) ((void)(x))
#endif
/*!
* This function asserts that a (continuous) memory region from ptr to size
* being "poisoned". Both read / write access to such memory region are
* prohibited until properly unpoisoned. The region must be previously
* allocated (do not pass a freed pointer here), but not necessarily be an
* entire object that the malloc returns. You can punch hole a part of a
* gigantic heap arena. This is handy when you do not free an allocated memory
* region to reuse later: poison when you keep it unused, and unpoison when you
* reuse.
*
* \param[in] ptr pointer to the beginning of the memory region to poison.
* \param[in] size the length of the memory region to poison.
*/
static inline void
asan_poison_memory_region(const volatile void *ptr, size_t size)
{
__msan_poison(ptr, size);
__asan_poison_memory_region(ptr, size);
}
/*!
* This is a variant of asan_poison_memory_region that takes a VALUE.
*
* \param[in] obj target object.
*/
static inline void
asan_poison_object(VALUE obj)
{
MAYBE_UNUSED(struct RVALUE *) ptr = (void *)obj;
asan_poison_memory_region(ptr, SIZEOF_VALUE);
}
#if !__has_feature(address_sanitizer)
#define asan_poison_object_if(ptr, obj) ((void)(ptr), (void)(obj))
#else
#define asan_poison_object_if(ptr, obj) do { \
if (ptr) asan_poison_object(obj); \
} while (0)
#endif
/*!
* This function predicates if the given object is fully addressable or not.
*
* \param[in] obj target object.
* \retval 0 the given object is fully addressable.
* \retval otherwise pointer to first such byte who is poisoned.
*/
static inline void *
asan_poisoned_object_p(VALUE obj)
{
MAYBE_UNUSED(struct RVALUE *) ptr = (void *)obj;
return __asan_region_is_poisoned(ptr, SIZEOF_VALUE);
}
/*!
* This function asserts that a (formally poisoned) memory region from ptr to
* size is now addressable. Write access to such memory region gets allowed.
* However read access might or might not be possible depending on situations,
* because the region can have contents of previous usages. That information
* should be passed by the malloc_p flag. If that is true, the contents of the
* region is _not_ fully defined (like the return value of malloc behaves).
* Reading from there is NG; write something first. If malloc_p is false on
* the other hand, that memory region is fully defined and can be read
* immediately.
*
* \param[in] ptr pointer to the beginning of the memory region to unpoison.
* \param[in] size the length of the memory region.
* \param[in] malloc_p if the memory region is like a malloc's return value or not.
*/
static inline void
asan_unpoison_memory_region(const volatile void *ptr, size_t size, bool malloc_p)
{
__asan_unpoison_memory_region(ptr, size);
if (malloc_p) {
__msan_allocated_memory(ptr, size);
}
else {
__msan_unpoison(ptr, size);
}
}
/*!
* This is a variant of asan_unpoison_memory_region that takes a VALUE.
*
* \param[in] obj target object.
* \param[in] malloc_p if the memory region is like a malloc's return value or not.
*/
static inline void
asan_unpoison_object(VALUE obj, bool newobj_p)
{
MAYBE_UNUSED(struct RVALUE *) ptr = (void *)obj;
asan_unpoison_memory_region(ptr, SIZEOF_VALUE, newobj_p);
}
#endif
/* Prevent compiler from reordering access */
#define ACCESS_ONCE(type,x) (*((volatile type *)&(x)))
#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 201112L)
# define STATIC_ASSERT(name, expr) _Static_assert(expr, #name ": " #expr)
#elif GCC_VERSION_SINCE(4, 6, 0) || __has_extension(c_static_assert)
# define STATIC_ASSERT(name, expr) RB_GNUC_EXTENSION _Static_assert(expr, #name ": " #expr)
#else
# define STATIC_ASSERT(name, expr) typedef int static_assert_##name##_check[1 - 2*!(expr)]
#endif
#define SIGNED_INTEGER_TYPE_P(int_type) (0 > ((int_type)0)-1)
#define SIGNED_INTEGER_MAX(sint_type) \
(sint_type) \
((((sint_type)1) << (sizeof(sint_type) * CHAR_BIT - 2)) | \
((((sint_type)1) << (sizeof(sint_type) * CHAR_BIT - 2)) - 1))
#define SIGNED_INTEGER_MIN(sint_type) (-SIGNED_INTEGER_MAX(sint_type)-1)
#define UNSIGNED_INTEGER_MAX(uint_type) (~(uint_type)0)
#if SIGNEDNESS_OF_TIME_T < 0 /* signed */
# define TIMET_MAX SIGNED_INTEGER_MAX(time_t)
# define TIMET_MIN SIGNED_INTEGER_MIN(time_t)
#elif SIGNEDNESS_OF_TIME_T > 0 /* unsigned */
# define TIMET_MAX UNSIGNED_INTEGER_MAX(time_t)
# define TIMET_MIN ((time_t)0)
#endif
#define TIMET_MAX_PLUS_ONE (2*(double)(TIMET_MAX/2+1))
#ifdef HAVE_BUILTIN___BUILTIN_MUL_OVERFLOW_P
#define MUL_OVERFLOW_P(a, b) \
__builtin_mul_overflow_p((a), (b), (__typeof__(a * b))0)
#elif defined HAVE_BUILTIN___BUILTIN_MUL_OVERFLOW
#define MUL_OVERFLOW_P(a, b) \
RB_GNUC_EXTENSION_BLOCK(__typeof__(a) c; __builtin_mul_overflow((a), (b), &c))
#endif
#define MUL_OVERFLOW_SIGNED_INTEGER_P(a, b, min, max) ( \
(a) == 0 ? 0 : \
(a) == -1 ? (b) < -(max) : \
(a) > 0 ? \
((b) > 0 ? (max) / (a) < (b) : (min) / (a) > (b)) : \
((b) > 0 ? (min) / (a) < (b) : (max) / (a) > (b)))
#ifdef HAVE_BUILTIN___BUILTIN_MUL_OVERFLOW_P
/* __builtin_mul_overflow_p can take bitfield */
/* and GCC permits bitfields for integers other than int */
#define MUL_OVERFLOW_FIXNUM_P(a, b) RB_GNUC_EXTENSION_BLOCK( \
struct { long fixnum : SIZEOF_LONG * CHAR_BIT - 1; } c; \
__builtin_mul_overflow_p((a), (b), c.fixnum); \
)
#else
#define MUL_OVERFLOW_FIXNUM_P(a, b) MUL_OVERFLOW_SIGNED_INTEGER_P(a, b, FIXNUM_MIN, FIXNUM_MAX)
#endif
#ifdef MUL_OVERFLOW_P
#define MUL_OVERFLOW_LONG_LONG_P(a, b) MUL_OVERFLOW_P(a, b)
#define MUL_OVERFLOW_LONG_P(a, b) MUL_OVERFLOW_P(a, b)
#define MUL_OVERFLOW_INT_P(a, b) MUL_OVERFLOW_P(a, b)
#else
#define MUL_OVERFLOW_LONG_LONG_P(a, b) MUL_OVERFLOW_SIGNED_INTEGER_P(a, b, LLONG_MIN, LLONG_MAX)
#define MUL_OVERFLOW_LONG_P(a, b) MUL_OVERFLOW_SIGNED_INTEGER_P(a, b, LONG_MIN, LONG_MAX)
#define MUL_OVERFLOW_INT_P(a, b) MUL_OVERFLOW_SIGNED_INTEGER_P(a, b, INT_MIN, INT_MAX)
#endif
#ifndef swap16
# ifdef HAVE_BUILTIN___BUILTIN_BSWAP16
# define swap16(x) __builtin_bswap16(x)
# endif
#endif
#ifndef swap16
# define swap16(x) ((uint16_t)((((x)&0xFF)<<8) | (((x)>>8)&0xFF)))
#endif
#ifndef swap32
# ifdef HAVE_BUILTIN___BUILTIN_BSWAP32
# define swap32(x) __builtin_bswap32(x)
# endif
#endif
#ifndef swap32
# define swap32(x) ((uint32_t)((((x)&0xFF)<<24) \
|(((x)>>24)&0xFF) \
|(((x)&0x0000FF00)<<8) \
|(((x)&0x00FF0000)>>8) ))
#endif
#ifndef swap64
# ifdef HAVE_BUILTIN___BUILTIN_BSWAP64
# define swap64(x) __builtin_bswap64(x)
# endif
#endif
#ifndef swap64
# ifdef HAVE_INT64_T
# define byte_in_64bit(n) ((uint64_t)0xff << (n))
# define swap64(x) ((uint64_t)((((x)&byte_in_64bit(0))<<56) \
|(((x)>>56)&0xFF) \
|(((x)&byte_in_64bit(8))<<40) \
|(((x)&byte_in_64bit(48))>>40) \
|(((x)&byte_in_64bit(16))<<24) \
|(((x)&byte_in_64bit(40))>>24) \
|(((x)&byte_in_64bit(24))<<8) \
|(((x)&byte_in_64bit(32))>>8)))
# endif
#endif
static inline unsigned int
nlz_int(unsigned int x)
{
#if defined(HAVE_BUILTIN___BUILTIN_CLZ)
if (x == 0) return SIZEOF_INT * CHAR_BIT;
return (unsigned int)__builtin_clz(x);
#else
unsigned int y;
# if 64 < SIZEOF_INT * CHAR_BIT
unsigned int n = 128;
# elif 32 < SIZEOF_INT * CHAR_BIT
unsigned int n = 64;
# else
unsigned int n = 32;
# endif
# if 64 < SIZEOF_INT * CHAR_BIT
y = x >> 64; if (y) {n -= 64; x = y;}
# endif
# if 32 < SIZEOF_INT * CHAR_BIT
y = x >> 32; if (y) {n -= 32; x = y;}
# endif
y = x >> 16; if (y) {n -= 16; x = y;}
y = x >> 8; if (y) {n -= 8; x = y;}
y = x >> 4; if (y) {n -= 4; x = y;}
y = x >> 2; if (y) {n -= 2; x = y;}
y = x >> 1; if (y) {return n - 2;}
return (unsigned int)(n - x);
#endif
}
static inline unsigned int
nlz_long(unsigned long x)
{
#if defined(HAVE_BUILTIN___BUILTIN_CLZL)
if (x == 0) return SIZEOF_LONG * CHAR_BIT;
return (unsigned int)__builtin_clzl(x);
#else
unsigned long y;
# if 64 < SIZEOF_LONG * CHAR_BIT
unsigned int n = 128;
# elif 32 < SIZEOF_LONG * CHAR_BIT
unsigned int n = 64;
# else
unsigned int n = 32;
# endif
# if 64 < SIZEOF_LONG * CHAR_BIT
y = x >> 64; if (y) {n -= 64; x = y;}
# endif
# if 32 < SIZEOF_LONG * CHAR_BIT
y = x >> 32; if (y) {n -= 32; x = y;}
# endif
y = x >> 16; if (y) {n -= 16; x = y;}
y = x >> 8; if (y) {n -= 8; x = y;}
y = x >> 4; if (y) {n -= 4; x = y;}
y = x >> 2; if (y) {n -= 2; x = y;}
y = x >> 1; if (y) {return n - 2;}
return (unsigned int)(n - x);
#endif
}
#ifdef HAVE_LONG_LONG
static inline unsigned int
nlz_long_long(unsigned LONG_LONG x)
{
#if defined(HAVE_BUILTIN___BUILTIN_CLZLL)
if (x == 0) return SIZEOF_LONG_LONG * CHAR_BIT;
return (unsigned int)__builtin_clzll(x);
#else
unsigned LONG_LONG y;
# if 64 < SIZEOF_LONG_LONG * CHAR_BIT
unsigned int n = 128;
# elif 32 < SIZEOF_LONG_LONG * CHAR_BIT
unsigned int n = 64;
# else
unsigned int n = 32;
# endif
# if 64 < SIZEOF_LONG_LONG * CHAR_BIT
y = x >> 64; if (y) {n -= 64; x = y;}
# endif
# if 32 < SIZEOF_LONG_LONG * CHAR_BIT
y = x >> 32; if (y) {n -= 32; x = y;}
# endif
y = x >> 16; if (y) {n -= 16; x = y;}
y = x >> 8; if (y) {n -= 8; x = y;}
y = x >> 4; if (y) {n -= 4; x = y;}
y = x >> 2; if (y) {n -= 2; x = y;}
y = x >> 1; if (y) {return n - 2;}
return (unsigned int)(n - x);
#endif
}
#endif
#ifdef HAVE_UINT128_T
static inline unsigned int
nlz_int128(uint128_t x)
{
uint128_t y;
unsigned int n = 128;
y = x >> 64; if (y) {n -= 64; x = y;}
y = x >> 32; if (y) {n -= 32; x = y;}
y = x >> 16; if (y) {n -= 16; x = y;}
y = x >> 8; if (y) {n -= 8; x = y;}
y = x >> 4; if (y) {n -= 4; x = y;}
y = x >> 2; if (y) {n -= 2; x = y;}
y = x >> 1; if (y) {return n - 2;}
return (unsigned int)(n - x);
}
#endif
static inline unsigned int
nlz_intptr(uintptr_t x)
{
#if SIZEOF_UINTPTR_T == SIZEOF_INT
return nlz_int(x);
#elif SIZEOF_UINTPTR_T == SIZEOF_LONG
return nlz_long(x);
#elif SIZEOF_UINTPTR_T == SIZEOF_LONG_LONG
return nlz_long_long(x);
#else
#error no known integer type corresponds uintptr_t
return /* sane compiler */ ~0;
#endif
}
static inline unsigned int
rb_popcount32(uint32_t x)
{
#ifdef HAVE_BUILTIN___BUILTIN_POPCOUNT
return (unsigned int)__builtin_popcount(x);
#else
x = (x & 0x55555555) + (x >> 1 & 0x55555555);
x = (x & 0x33333333) + (x >> 2 & 0x33333333);
x = (x & 0x0f0f0f0f) + (x >> 4 & 0x0f0f0f0f);
x = (x & 0x001f001f) + (x >> 8 & 0x001f001f);
return (x & 0x0000003f) + (x >>16 & 0x0000003f);
#endif
}
static inline int
rb_popcount64(uint64_t x)
{
#ifdef HAVE_BUILTIN___BUILTIN_POPCOUNT
return __builtin_popcountll(x);
#else
x = (x & 0x5555555555555555) + (x >> 1 & 0x5555555555555555);
x = (x & 0x3333333333333333) + (x >> 2 & 0x3333333333333333);
x = (x & 0x0707070707070707) + (x >> 4 & 0x0707070707070707);
x = (x & 0x001f001f001f001f) + (x >> 8 & 0x001f001f001f001f);
x = (x & 0x0000003f0000003f) + (x >>16 & 0x0000003f0000003f);
return (x & 0x7f) + (x >>32 & 0x7f);
#endif
}
static inline int
rb_popcount_intptr(uintptr_t x)
{
#if SIZEOF_VOIDP == 8
return rb_popcount64(x);
#elif SIZEOF_VOIDP == 4
return rb_popcount32(x);
#endif
}
static inline int
ntz_int32(uint32_t x)
{
#ifdef HAVE_BUILTIN___BUILTIN_CTZ
return __builtin_ctz(x);
#else
return rb_popcount32((~x) & (x-1));
#endif
}
static inline int
ntz_int64(uint64_t x)
{
#ifdef HAVE_BUILTIN___BUILTIN_CTZLL
return __builtin_ctzll(x);
#else
return rb_popcount64((~x) & (x-1));
#endif
}
static inline int
ntz_intptr(uintptr_t x)
{
#if SIZEOF_VOIDP == 8
return ntz_int64(x);
#elif SIZEOF_VOIDP == 4
return ntz_int32(x);
#endif
}
#if HAVE_LONG_LONG && SIZEOF_LONG * 2 <= SIZEOF_LONG_LONG
# define DLONG LONG_LONG
# define DL2NUM(x) LL2NUM(x)
#elif defined(HAVE_INT128_T)
# define DLONG int128_t
# define DL2NUM(x) (RB_FIXABLE(x) ? LONG2FIX(x) : rb_int128t2big(x))
VALUE rb_int128t2big(int128_t n);
#endif
static inline long
rb_overflowed_fix_to_int(long x)
{
return (long)((unsigned long)(x >> 1) ^ (1LU << (SIZEOF_LONG * CHAR_BIT - 1)));
}
static inline VALUE
rb_fix_plus_fix(VALUE x, VALUE y)
{
#ifdef HAVE_BUILTIN___BUILTIN_ADD_OVERFLOW
long lz;
/* NOTE
* (1) `LONG2FIX(FIX2LONG(x)+FIX2LONG(y))`
+ = `((lx*2+1)/2 + (ly*2+1)/2)*2+1`
+ = `lx*2 + ly*2 + 1`
+ = `(lx*2+1) + (ly*2+1) - 1`
+ = `x + y - 1`
* (2) Fixnum's LSB is always 1.
* It means you can always run `x - 1` without overflow.
* (3) Of course `z = x + (y-1)` may overflow.
* At that time true value is
* * positive: 0b0 1xxx...1, and z = 0b1xxx...1
* * nevative: 0b1 0xxx...1, and z = 0b0xxx...1
* To convert this true value to long,
* (a) Use arithmetic shift
* * positive: 0b11xxx...
* * negative: 0b00xxx...
* (b) invert MSB
* * positive: 0b01xxx...
* * negative: 0b10xxx...
*/
if (__builtin_add_overflow((long)x, (long)y-1, &lz)) {
return rb_int2big(rb_overflowed_fix_to_int(lz));
}
else {
return (VALUE)lz;
}
#else
long lz = FIX2LONG(x) + FIX2LONG(y);
return LONG2NUM(lz);
#endif
}
static inline VALUE
rb_fix_minus_fix(VALUE x, VALUE y)
{
#ifdef HAVE_BUILTIN___BUILTIN_SUB_OVERFLOW
long lz;
if (__builtin_sub_overflow((long)x, (long)y-1, &lz)) {
return rb_int2big(rb_overflowed_fix_to_int(lz));
}
else {
return (VALUE)lz;
}
#else
long lz = FIX2LONG(x) - FIX2LONG(y);
return LONG2NUM(lz);
#endif
}
/* arguments must be Fixnum */
static inline VALUE
rb_fix_mul_fix(VALUE x, VALUE y)
{
long lx = FIX2LONG(x);
long ly = FIX2LONG(y);
#ifdef DLONG
return DL2NUM((DLONG)lx * (DLONG)ly);
#else
if (MUL_OVERFLOW_FIXNUM_P(lx, ly)) {
return rb_big_mul(rb_int2big(lx), rb_int2big(ly));
}
else {
return LONG2FIX(lx * ly);
}
#endif
}
/*
* This behaves different from C99 for negative arguments.
* Note that div may overflow fixnum.
*/
static inline void
rb_fix_divmod_fix(VALUE a, VALUE b, VALUE *divp, VALUE *modp)
{
/* assume / and % comply C99.
* ldiv(3) won't be inlined by GCC and clang.
* I expect / and % are compiled as single idiv.
*/
long x = FIX2LONG(a);
long y = FIX2LONG(b);
long div, mod;
if (x == FIXNUM_MIN && y == -1) {
if (divp) *divp = LONG2NUM(-FIXNUM_MIN);
if (modp) *modp = LONG2FIX(0);
return;
}
div = x / y;
mod = x % y;
if (y > 0 ? mod < 0 : mod > 0) {
mod += y;
div -= 1;
}
if (divp) *divp = LONG2FIX(div);
if (modp) *modp = LONG2FIX(mod);
}
/* div() for Ruby
* This behaves different from C99 for negative arguments.
*/
static inline VALUE
rb_fix_div_fix(VALUE x, VALUE y)
{
VALUE div;
rb_fix_divmod_fix(x, y, &div, NULL);
return div;
}
/* mod() for Ruby
* This behaves different from C99 for negative arguments.
*/
static inline VALUE
rb_fix_mod_fix(VALUE x, VALUE y)
{
VALUE mod;
rb_fix_divmod_fix(x, y, NULL, &mod);
return mod;
}
#if defined(HAVE_UINT128_T) && defined(HAVE_LONG_LONG)
# define bit_length(x) \
(unsigned int) \
(sizeof(x) <= SIZEOF_INT ? SIZEOF_INT * CHAR_BIT - nlz_int((unsigned int)(x)) : \
sizeof(x) <= SIZEOF_LONG ? SIZEOF_LONG * CHAR_BIT - nlz_long((unsigned long)(x)) : \
sizeof(x) <= SIZEOF_LONG_LONG ? SIZEOF_LONG_LONG * CHAR_BIT - nlz_long_long((unsigned LONG_LONG)(x)) : \
SIZEOF_INT128_T * CHAR_BIT - nlz_int128((uint128_t)(x)))
#elif defined(HAVE_UINT128_T)
# define bit_length(x) \
(unsigned int) \
(sizeof(x) <= SIZEOF_INT ? SIZEOF_INT * CHAR_BIT - nlz_int((unsigned int)(x)) : \
sizeof(x) <= SIZEOF_LONG ? SIZEOF_LONG * CHAR_BIT - nlz_long((unsigned long)(x)) : \
SIZEOF_INT128_T * CHAR_BIT - nlz_int128((uint128_t)(x)))
#elif defined(HAVE_LONG_LONG)
# define bit_length(x) \
(unsigned int) \
(sizeof(x) <= SIZEOF_INT ? SIZEOF_INT * CHAR_BIT - nlz_int((unsigned int)(x)) : \
sizeof(x) <= SIZEOF_LONG ? SIZEOF_LONG * CHAR_BIT - nlz_long((unsigned long)(x)) : \
SIZEOF_LONG_LONG * CHAR_BIT - nlz_long_long((unsigned LONG_LONG)(x)))
#else
# define bit_length(x) \
(unsigned int) \
(sizeof(x) <= SIZEOF_INT ? SIZEOF_INT * CHAR_BIT - nlz_int((unsigned int)(x)) : \
SIZEOF_LONG * CHAR_BIT - nlz_long((unsigned long)(x)))
#endif
#ifndef BDIGIT
# if SIZEOF_INT*2 <= SIZEOF_LONG_LONG
# define BDIGIT unsigned int
# define SIZEOF_BDIGIT SIZEOF_INT
# define BDIGIT_DBL unsigned LONG_LONG
# define BDIGIT_DBL_SIGNED LONG_LONG
# define PRI_BDIGIT_PREFIX ""
# define PRI_BDIGIT_DBL_PREFIX PRI_LL_PREFIX
# elif SIZEOF_INT*2 <= SIZEOF_LONG
# define BDIGIT unsigned int
# define SIZEOF_BDIGIT SIZEOF_INT
# define BDIGIT_DBL unsigned long
# define BDIGIT_DBL_SIGNED long
# define PRI_BDIGIT_PREFIX ""
# define PRI_BDIGIT_DBL_PREFIX "l"
# elif SIZEOF_SHORT*2 <= SIZEOF_LONG
# define BDIGIT unsigned short
# define SIZEOF_BDIGIT SIZEOF_SHORT
# define BDIGIT_DBL unsigned long
# define BDIGIT_DBL_SIGNED long
# define PRI_BDIGIT_PREFIX "h"
# define PRI_BDIGIT_DBL_PREFIX "l"
# else
# define BDIGIT unsigned short
# define SIZEOF_BDIGIT (SIZEOF_LONG/2)
# define SIZEOF_ACTUAL_BDIGIT SIZEOF_LONG
# define BDIGIT_DBL unsigned long
# define BDIGIT_DBL_SIGNED long
# define PRI_BDIGIT_PREFIX "h"
# define PRI_BDIGIT_DBL_PREFIX "l"
# endif
#endif
#ifndef SIZEOF_ACTUAL_BDIGIT
# define SIZEOF_ACTUAL_BDIGIT SIZEOF_BDIGIT
#endif
#ifdef PRI_BDIGIT_PREFIX
# define PRIdBDIGIT PRI_BDIGIT_PREFIX"d"
# define PRIiBDIGIT PRI_BDIGIT_PREFIX"i"
# define PRIoBDIGIT PRI_BDIGIT_PREFIX"o"
# define PRIuBDIGIT PRI_BDIGIT_PREFIX"u"
# define PRIxBDIGIT PRI_BDIGIT_PREFIX"x"
# define PRIXBDIGIT PRI_BDIGIT_PREFIX"X"
#endif
#ifdef PRI_BDIGIT_DBL_PREFIX
# define PRIdBDIGIT_DBL PRI_BDIGIT_DBL_PREFIX"d"
# define PRIiBDIGIT_DBL PRI_BDIGIT_DBL_PREFIX"i"
# define PRIoBDIGIT_DBL PRI_BDIGIT_DBL_PREFIX"o"
# define PRIuBDIGIT_DBL PRI_BDIGIT_DBL_PREFIX"u"
# define PRIxBDIGIT_DBL PRI_BDIGIT_DBL_PREFIX"x"
# define PRIXBDIGIT_DBL PRI_BDIGIT_DBL_PREFIX"X"
#endif
#define BIGNUM_EMBED_LEN_NUMBITS 3
#ifndef BIGNUM_EMBED_LEN_MAX
# if (SIZEOF_VALUE*RVALUE_EMBED_LEN_MAX/SIZEOF_ACTUAL_BDIGIT) < (1 << BIGNUM_EMBED_LEN_NUMBITS)-1
# define BIGNUM_EMBED_LEN_MAX (SIZEOF_VALUE*RVALUE_EMBED_LEN_MAX/SIZEOF_ACTUAL_BDIGIT)
# else
# define BIGNUM_EMBED_LEN_MAX ((1 << BIGNUM_EMBED_LEN_NUMBITS)-1)
# endif
#endif
struct RBignum {
struct RBasic basic;
union {
struct {
size_t len;
BDIGIT *digits;
} heap;
BDIGIT ary[BIGNUM_EMBED_LEN_MAX];
} as;
};
#define BIGNUM_SIGN_BIT ((VALUE)FL_USER1)
/* sign: positive:1, negative:0 */
#define BIGNUM_SIGN(b) ((RBASIC(b)->flags & BIGNUM_SIGN_BIT) != 0)
#define BIGNUM_SET_SIGN(b,sign) \
((sign) ? (RBASIC(b)->flags |= BIGNUM_SIGN_BIT) \
: (RBASIC(b)->flags &= ~BIGNUM_SIGN_BIT))
#define BIGNUM_POSITIVE_P(b) BIGNUM_SIGN(b)
#define BIGNUM_NEGATIVE_P(b) (!BIGNUM_SIGN(b))
#define BIGNUM_NEGATE(b) (RBASIC(b)->flags ^= BIGNUM_SIGN_BIT)
#define BIGNUM_EMBED_FLAG ((VALUE)FL_USER2)
#define BIGNUM_EMBED_LEN_MASK \
(~(~(VALUE)0U << BIGNUM_EMBED_LEN_NUMBITS) << BIGNUM_EMBED_LEN_SHIFT)
#define BIGNUM_EMBED_LEN_SHIFT \
(FL_USHIFT+3) /* bit offset of BIGNUM_EMBED_LEN_MASK */
#define BIGNUM_LEN(b) \
((RBASIC(b)->flags & BIGNUM_EMBED_FLAG) ? \
(size_t)((RBASIC(b)->flags >> BIGNUM_EMBED_LEN_SHIFT) & \
(BIGNUM_EMBED_LEN_MASK >> BIGNUM_EMBED_LEN_SHIFT)) : \
RBIGNUM(b)->as.heap.len)
/* LSB:BIGNUM_DIGITS(b)[0], MSB:BIGNUM_DIGITS(b)[BIGNUM_LEN(b)-1] */
#define BIGNUM_DIGITS(b) \
((RBASIC(b)->flags & BIGNUM_EMBED_FLAG) ? \
RBIGNUM(b)->as.ary : \
RBIGNUM(b)->as.heap.digits)
#define BIGNUM_LENINT(b) rb_long2int(BIGNUM_LEN(b))
#define RBIGNUM(obj) (R_CAST(RBignum)(obj))
struct RRational {
struct RBasic basic;
VALUE num;
VALUE den;
};
#define RRATIONAL(obj) (R_CAST(RRational)(obj))
#define RRATIONAL_SET_NUM(rat, n) RB_OBJ_WRITE((rat), &((struct RRational *)(rat))->num,(n))
#define RRATIONAL_SET_DEN(rat, d) RB_OBJ_WRITE((rat), &((struct RRational *)(rat))->den,(d))
struct RFloat {
struct RBasic basic;
double float_value;
};
#define RFLOAT(obj) (R_CAST(RFloat)(obj))
struct RComplex {
struct RBasic basic;
VALUE real;
VALUE imag;
};
#define RCOMPLEX(obj) (R_CAST(RComplex)(obj))
/* shortcut macro for internal only */
#define RCOMPLEX_SET_REAL(cmp, r) RB_OBJ_WRITE((cmp), &((struct RComplex *)(cmp))->real,(r))
#define RCOMPLEX_SET_IMAG(cmp, i) RB_OBJ_WRITE((cmp), &((struct RComplex *)(cmp))->imag,(i))
enum ruby_rhash_flags {
RHASH_PROC_DEFAULT = FL_USER2, /* FL 2 */
RHASH_ST_TABLE_FLAG = FL_USER3, /* FL 3 */
#define RHASH_AR_TABLE_MAX_SIZE SIZEOF_VALUE
RHASH_AR_TABLE_SIZE_MASK = (FL_USER4|FL_USER5|FL_USER6|FL_USER7), /* FL 4..7 */
RHASH_AR_TABLE_SIZE_SHIFT = (FL_USHIFT+4),
RHASH_AR_TABLE_BOUND_MASK = (FL_USER8|FL_USER9|FL_USER10|FL_USER11), /* FL 8..11 */
RHASH_AR_TABLE_BOUND_SHIFT = (FL_USHIFT+8),
// we can not put it in "enum" because it can exceed "int" range.
#define RHASH_LEV_MASK (FL_USER13 | FL_USER14 | FL_USER15 | /* FL 13..19 */ \
FL_USER16 | FL_USER17 | FL_USER18 | FL_USER19)
#if USE_TRANSIENT_HEAP
RHASH_TRANSIENT_FLAG = FL_USER12, /* FL 12 */
#endif
RHASH_LEV_SHIFT = (FL_USHIFT + 13),
RHASH_LEV_MAX = 127, /* 7 bits */
RHASH_ENUM_END
};
#define RHASH_AR_TABLE_SIZE_RAW(h) \
((unsigned int)((RBASIC(h)->flags & RHASH_AR_TABLE_SIZE_MASK) >> RHASH_AR_TABLE_SIZE_SHIFT))
int rb_hash_ar_table_p(VALUE hash);
struct ar_table_struct *rb_hash_ar_table(VALUE hash);
st_table *rb_hash_st_table(VALUE hash);
void rb_hash_st_table_set(VALUE hash, st_table *st);
#if 0 /* for debug */
#define RHASH_AR_TABLE_P(hash) rb_hash_ar_table_p(hash)
#define RHASH_AR_TABLE(h) rb_hash_ar_table(h)
#define RHASH_ST_TABLE(h) rb_hash_st_table(h)
#else
#define RHASH_AR_TABLE_P(hash) (!FL_TEST_RAW((hash), RHASH_ST_TABLE_FLAG))
#define RHASH_AR_TABLE(hash) (RHASH(hash)->as.ar)
#define RHASH_ST_TABLE(hash) (RHASH(hash)->as.st)
#endif
#define RHASH(obj) (R_CAST(RHash)(obj))
#define RHASH_ST_SIZE(h) (RHASH_ST_TABLE(h)->num_entries)
#define RHASH_ST_TABLE_P(h) (!RHASH_AR_TABLE_P(h))
#define RHASH_ST_CLEAR(h) (FL_UNSET_RAW(h, RHASH_ST_TABLE_FLAG), RHASH(h)->as.ar = NULL)
#define RHASH_AR_TABLE_SIZE_MASK (VALUE)RHASH_AR_TABLE_SIZE_MASK
#define RHASH_AR_TABLE_SIZE_SHIFT RHASH_AR_TABLE_SIZE_SHIFT
#define RHASH_AR_TABLE_BOUND_MASK (VALUE)RHASH_AR_TABLE_BOUND_MASK
#define RHASH_AR_TABLE_BOUND_SHIFT RHASH_AR_TABLE_BOUND_SHIFT
#if USE_TRANSIENT_HEAP
#define RHASH_TRANSIENT_P(hash) FL_TEST_RAW((hash), RHASH_TRANSIENT_FLAG)
#define RHASH_SET_TRANSIENT_FLAG(h) FL_SET_RAW(h, RHASH_TRANSIENT_FLAG)
#define RHASH_UNSET_TRANSIENT_FLAG(h) FL_UNSET_RAW(h, RHASH_TRANSIENT_FLAG)
#else
#define RHASH_TRANSIENT_P(hash) 0
#define RHASH_SET_TRANSIENT_FLAG(h) ((void)0)
#define RHASH_UNSET_TRANSIENT_FLAG(h) ((void)0)
#endif
#if SIZEOF_VALUE / RHASH_AR_TABLE_MAX_SIZE == 2
typedef uint16_t ar_hint_t;
#elif SIZEOF_VALUE / RHASH_AR_TABLE_MAX_SIZE == 1
typedef unsigned char ar_hint_t;
#else
#error unsupported
#endif
struct RHash {
struct RBasic basic;
union {
st_table *st;
struct ar_table_struct *ar; /* possibly 0 */
} as;
const VALUE ifnone;
union {
ar_hint_t ary[RHASH_AR_TABLE_MAX_SIZE];
VALUE word;
} ar_hint;
};
#ifdef RHASH_IFNONE
# undef RHASH_IFNONE
# undef RHASH_SIZE
# define RHASH_IFNONE(h) (RHASH(h)->ifnone)
# define RHASH_SIZE(h) (RHASH_AR_TABLE_P(h) ? RHASH_AR_TABLE_SIZE_RAW(h) : RHASH_ST_SIZE(h))
#endif /* ifdef RHASH_IFNONE */
struct RMoved {
VALUE flags;
VALUE destination;
VALUE next;
};
/* missing/setproctitle.c */
#ifndef HAVE_SETPROCTITLE
extern void ruby_init_setproctitle(int argc, char *argv[]);
#endif
#define RSTRUCT_EMBED_LEN_MAX RSTRUCT_EMBED_LEN_MAX
#define RSTRUCT_EMBED_LEN_MASK RSTRUCT_EMBED_LEN_MASK
#define RSTRUCT_EMBED_LEN_SHIFT RSTRUCT_EMBED_LEN_SHIFT
enum {
RSTRUCT_EMBED_LEN_MAX = RVALUE_EMBED_LEN_MAX,
RSTRUCT_EMBED_LEN_MASK = (RUBY_FL_USER2|RUBY_FL_USER1),
RSTRUCT_EMBED_LEN_SHIFT = (RUBY_FL_USHIFT+1),
RSTRUCT_TRANSIENT_FLAG = FL_USER3,
RSTRUCT_ENUM_END
};
#if USE_TRANSIENT_HEAP
#define RSTRUCT_TRANSIENT_P(st) FL_TEST_RAW((obj), RSTRUCT_TRANSIENT_FLAG)
#define RSTRUCT_TRANSIENT_SET(st) FL_SET_RAW((st), RSTRUCT_TRANSIENT_FLAG)
#define RSTRUCT_TRANSIENT_UNSET(st) FL_UNSET_RAW((st), RSTRUCT_TRANSIENT_FLAG)
#else
#define RSTRUCT_TRANSIENT_P(st) 0
#define RSTRUCT_TRANSIENT_SET(st) ((void)0)
#define RSTRUCT_TRANSIENT_UNSET(st) ((void)0)
#endif
struct RStruct {
struct RBasic basic;
union {
struct {
long len;
const VALUE *ptr;
} heap;
const VALUE ary[RSTRUCT_EMBED_LEN_MAX];
} as;
};
#undef RSTRUCT_LEN
#undef RSTRUCT_PTR
#undef RSTRUCT_SET
#undef RSTRUCT_GET
#define RSTRUCT_EMBED_LEN(st) \
(long)((RBASIC(st)->flags >> RSTRUCT_EMBED_LEN_SHIFT) & \
(RSTRUCT_EMBED_LEN_MASK >> RSTRUCT_EMBED_LEN_SHIFT))
#define RSTRUCT_LEN(st) rb_struct_len(st)
#define RSTRUCT_LENINT(st) rb_long2int(RSTRUCT_LEN(st))
#define RSTRUCT_CONST_PTR(st) rb_struct_const_ptr(st)
#define RSTRUCT_PTR(st) ((VALUE *)RSTRUCT_CONST_PTR(RB_OBJ_WB_UNPROTECT_FOR(STRUCT, st)))
#define RSTRUCT_SET(st, idx, v) RB_OBJ_WRITE(st, &RSTRUCT_CONST_PTR(st)[idx], (v))
#define RSTRUCT_GET(st, idx) (RSTRUCT_CONST_PTR(st)[idx])
#define RSTRUCT(obj) (R_CAST(RStruct)(obj))
static inline long
rb_struct_len(VALUE st)
{
return (RBASIC(st)->flags & RSTRUCT_EMBED_LEN_MASK) ?
RSTRUCT_EMBED_LEN(st) : RSTRUCT(st)->as.heap.len;
}
static inline const VALUE *
rb_struct_const_ptr(VALUE st)
{
return FIX_CONST_VALUE_PTR((RBASIC(st)->flags & RSTRUCT_EMBED_LEN_MASK) ?
RSTRUCT(st)->as.ary : RSTRUCT(st)->as.heap.ptr);
}
static inline const VALUE *
rb_struct_const_heap_ptr(VALUE st)
{
/* TODO: check embed on debug mode */
return RSTRUCT(st)->as.heap.ptr;
}
/* class.c */
struct rb_deprecated_classext_struct {
char conflict[sizeof(VALUE) * 3];
};
struct rb_subclass_entry;
typedef struct rb_subclass_entry rb_subclass_entry_t;
struct rb_subclass_entry {
VALUE klass;
rb_subclass_entry_t *next;
};