| type | java bits | native bits | type | signed | origin | |
|---|---|---|---|---|---|---|
| x32 | x64 | |||||
| void | 0 | 0 | 0 | void | void | ANSI-C |
| char | 8 | 8 | 8 | integer | any | ANSI-C |
| short | 16 | 16 | 16 | integer | any | ANSI-C |
| int | 32 | 32 | 32 | integer | any | ANSI-C |
| long | 64 | 32 | 321 | integer | any | ANSI-C - Windows |
| long | 64 | 32 | 64 | integer | any | ANSI-C - Unix |
| float | 32 | 32 | 32 | float | signed | ANSI-C |
| double | 64 | 64 | 64 | double | signed | ANSI-C |
| __int32 | 32 | 32 | 32 | integer | any | windows |
| __int64 | 64 | 64 | 64 | integer | any | windows |
| int8_t | 8 | 8 | 8 | integer | signed | stdint.h |
| uint8_t | 8 | 8 | 8 | integer | unsigned | stdint.h |
| int16_t | 16 | 16 | 16 | integer | signed | stdint.h |
| uint16_t | 16 | 16 | 16 | integer | unsigned | stdint.h |
| int32_t | 32 | 32 | 32 | integer | signed | stdint.h |
| uint32_t | 32 | 32 | 32 | integer | unsigned | stdint.h |
| int64_t | 64 | 64 | 64 | integer | signed | stdint.h |
| uint64_t | 64 | 64 | 64 | integer | unsigned | stdint.h |
| intptr_t | 64 | 32 | 64 | integer | signed | stdint.h |
| uintptr_t | 64 | 32 | 64 | integer | unsigned | stdint.h |
| ptrdiff_t | 64 | 32 | 64 | integer | signed | stddef.h |
| size_t | 64 | 32 | 64 | integer | unsigned | stddef.h |
| wchar_t | 32 | 32 | 32 | integer | signed | stddef.h |
Warning: Try to avoid unspecified bit sized types, especially long, since it differs on Unix and Windows!
Notes:
Compounds (structures) are aligned naturally, i.e. their inner components are aligned
and are itself aligned to it's largest element.
remainder = offset % alignmentsince alignment is a multiple of 2
-> x % 2n == x & (2n - 1)remainder = offset & ( alignment - 1 )
padding = (remainder > 0) ? alignment - remainder : 0 ;
aligned_offset = offset + padding ;
typedef struct {
char fill; // nibble one byte
// padding to align s1: padding_0
type_t s1; //
} test_struct_type_t;
padding_0 = sizeof(test_struct_type_t) - sizeof(type_t) - sizeof(char) ;
alignmentOf(type_t) = sizeof(test_struct_type_t) - sizeof(type_t) ;
| type | 32 bits | 64 bits | ||
|---|---|---|---|---|
| size | alignment | size | alignment | |
| char | 1 | 1 | 1 | 1 |
| short | 2 | 2 | 2 | 2 |
| int | 4 | 4 | 4 | 4 |
| float | 4 | 4 | 4 | 4 |
| long | 4 | 4 | 8†,4∗ | 8†,4∗ |
| pointer | 4 | 4 | 8 | 8 |
| long long | 8 | 4†,8∗+ | 8 | 8 |
| double | 8 | 4†,8∗+ | 8 | 8 |
| long double | 12†∗,8+,16- | 4†∗,8+,16- | 16 | 16 |
#include <gluegen_stdint.h> #include <gluegen_stddef.h> uint64_t test64; size_t size1; ptrdiff_t ptr1;
-I:
gluegen/make/stub_includes/platform
includeRefid element:
gluegen/make/stub_includes/gluegen
#define __GLUEGEN__ 2