utils.h

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Misc functions and macros.

Miscellaneous functions and macros useful for different tasks, like endian byteswap, unaligned reads, marking unused vars, etc…

Defines

READ_32_ALIGNED(ptr)             ( (((uint8_t *)(ptr))[0] << 24) | (((uint8_t *) (ptr))[1] << 16) | (((uint8_t *)(ptr))[2] << 8) | ((uint8_t *)(ptr))[3] )

READ_64_UNALIGNED(ptr)

( (((uint64_t) ((uint8_t *)(ptr))[0]) << 56) | (((uint64_t) ((uint8_t *) (ptr))[1]) << 48) | \

(((uint64_t) ((uint8_t *)(ptr))[2]) << 40) | (((uint64_t) ((uint8_t *) (ptr))[3]) << 32) | \

(((uint64_t) ((uint8_t *)(ptr))[4]) << 24) | (((uint64_t) ((uint8_t *) (ptr))[5]) << 16) | \

(((uint64_t) ((uint8_t *)(ptr))[6]) << 8) | (((uint64_t) ((uint8_t *) (ptr))[7])) )

WRITE_64_UNALIGNED(ptr, val)

{ \

((uint8_t *)(ptr))[0] = (((uint64_t) val) >> 56) & 0xff; \

((uint8_t *)(ptr))[1] = (((uint64_t) val) >> 48) & 0xff; \

((uint8_t *)(ptr))[2] = (((uint64_t) val) >> 40) & 0xff; \

((uint8_t *)(ptr))[3] = (((uint64_t) val) >> 32) & 0xff; \

((uint8_t *)(ptr))[4] = (((uint64_t) val) >> 24) & 0xff; \

((uint8_t *)(ptr))[5] = (((uint64_t) val) >> 16) & 0xff; \

((uint8_t *)(ptr))[6] = (((uint64_t) val) >> 8) & 0xff; \

((uint8_t *)(ptr))[7] = ((uint64_t) val) & 0xff; \

}

READ_32_UNALIGNED(ptr)             ( (((uint8_t *)(ptr))[0] << 24) | (((uint8_t *) (ptr))[1] << 16) | (((uint8_t *)(ptr))[2] << 8) | ((uint8_t *)(ptr))[3] )

WRITE_32_UNALIGNED(ptr, val)

{ \

((uint8_t *)(ptr))[0] = (((uint32_t) val) >> 24) & 0xff; \

((uint8_t *)(ptr))[1] = (((uint32_t) val) >> 16) & 0xff; \

((uint8_t *)(ptr))[2] = (((uint32_t) val) >> 8) & 0xff; \

((uint8_t *)(ptr))[3] = ((uint32_t) val) & 0xff; \

}

READ_16_UNALIGNED(ptr)             ( (((uint8_t *)(ptr))[0] << 8) | ((uint8_t *)(ptr))[1] )

WRITE_16_UNALIGNED(ptr, val)

{ \

((uint8_t *)(ptr))[0] = (((uint16_t) val) >> 8) & 0xff; \

((uint8_t *)(ptr))[1] = ((uint16_t) val) & 0xff; \

}

ENDIAN_SWAP_32(value) ((((value) & 0xFF) << 24) | (((value) & 0xFF00) << 8) | (((value) & 0xFF0000) >> 8) | (((value) & 0xFF000000) >> 24))

UNUSED(x) (void) (x);

IS_NULL_PTR(x) ((x) == NULL)

LIKELY(x) (x)

UNLIKELY(x) (x)

HOT_FUNC

COLD_FUNC

MALLOC_LIKE

MUST_CHECK

AVM_ABORT() abort()

CAST_FUNC_TO_VOID_PTR(f) ((void *) (f))

CAST_VOID_TO_FUNC_PTR(f) ((func_ptr_t) (f))

CONTAINER_OF(ptr, type, member)     ((type *) (((char *) (ptr)) - offsetof(type, member)))

PRINTF_FORMAT_ARGS(...)

NO_DISCARD(...)

UNREACHABLE(...)

Typedefs

typedef void (*func_ptr_t)(void)