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added compile indepenedent pointer alignment

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vurtun 2015-10-14 18:34:12 +02:00
parent b0af454098
commit f32da7a789
1 changed files with 22 additions and 2 deletions
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24
zahnrad.c
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@ -64,9 +64,29 @@ static const struct zr_rect zr_null_rect = {-8192.0f, -8192.0f, 16384, 16384};
/* ============================================================== /* ==============================================================
* ALIGNMENT * ALIGNMENT
* =============================================================== */ * =============================================================== */
#define ZR_ALIGN_PTR(x, mask) (void*)((zr_ptr)((zr_byte*)(x) + (mask-1)) & ~(mask-1)) /* Pointer to Integer type conversion for pointer alignment */
#define ZR_ALIGN_PTR_BACK(x, mask)(void*)((zr_ptr)((zr_byte*)(x)) & ~(mask-1)); #if defined(__PTRDIFF_TYPE__) /* This case should work for GCC*/
# define ZR_UINT_TO_PTR(x) ((void*)(__PTRDIFF_TYPE__)(x))
# define ZR_PTR_TO_UINT(x) ((zr_size)(__PTRDIFF_TYPE__)(x))
#elif !defined(__GNUC__) /* works for compilers other than LLVM */
# define ZR_UINT_TO_PTR(x) ((void*)&((char*)0)[x])
# define ZR_PTR_TO_UINT(x) ((zr_size)(((char*)x)-(char*)0))
#elif defined(ZR_USE_FIXED_TYPES) /* used if we have <stdint.h> */
# define ZR_UINT_TO_PTR(x) ((void*)(uintptr_t)(x))
# define ZR_PTR_TO_UINT(x) ((uintptr_t)(x))
#else /* generates warning but works */
# define ZR_UINT_TO_PTR(x) ((void*)(x))
# define ZR_PTR_TO_UINT(x) ((zr_size)(x))
#endif
#define ZR_MIN(a,b) (((a)<(b))?(a):(b))
#define ZR_MAX(a,b) (((a)>(b))?(a):(b))
#define ZR_ALIGN(x, mask) ((x) + (mask-1)) & ~(mask-1) #define ZR_ALIGN(x, mask) ((x) + (mask-1)) & ~(mask-1)
#define ZR_ALIGN_PTR(x, mask)\
(ZR_UINT_TO_PTR((ZR_PTR_TO_UINT((zr_byte*)(x) + (mask-1)) & ~(mask-1))))
#define ZR_ALIGN_PTR_BACK(x, mask)\
(ZR_UINT_TO_PTR((ZR_PTR_TO_UINT((zr_byte*)(x)) & ~(mask-1))))
#define ZR_OFFSETOF(st, m) ((zr_size)(&((st *)0)->m)) #define ZR_OFFSETOF(st, m) ((zr_size)(&((st *)0)->m))
#define ZR_CONTAINER_OF_CONST(ptr, type, member)\ #define ZR_CONTAINER_OF_CONST(ptr, type, member)\
((const type*)((const void*)((const zr_byte*)ptr - ZR_OFFSETOF(type, member)))) ((const type*)((const void*)((const zr_byte*)ptr - ZR_OFFSETOF(type, member))))