endianness compile and runtime tests More...
#include <sys/types.h>#include <sys/param.h>
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Detailed Description
History: -------- 2008-06-13 created by andrei
Defines:
- __IS_LITTLE_ENDIAN if the system is little endian and
- __IS_BIG_ENDIAN if it's big endian Function/macros:
- is_big_endian() - runtime test for big endian
- is_little_endian() - runtime test for little endian
- endianness_sanity_check() - returns 0 if the compile time detected endianness corresponds to the runtime detected one and -1 on error (recommended action: bail out)
Implementation notes: Endian macro names/tests for different OSes: linux: __BYTE_ORDER == __LITTLE_ENDIAN | __BIG_ENDIAN BYTE_ORDER == LITTLE_ENDIAN | BIG_ENDIAN bsd: _BYTE_ORDER == _LITTLE_ENDIAN | _BIG_ENDIAN BYTE_ORDER == LITTLE_ENDIAN | BIG_ENDIAN solaris: _LITTLE_ENDIAN | _BIG_ENDIAN
Include file for the endian macros: linux: <endian.h> (glibc), <sys/param.h> bsd: <sys/param.h>, <sys/endian.h> solaris: <sys/param.h>
Note: BIG_ENDIAN, LITTLE_ENDIAN, _BIG_ENDIAN, _LITTLE_ENDIAN cannot be used always, some OSes define both of them for BYTE_ORDER use (e.g. linux defines both BIG_ENDIAN & LITTLE_ENDIAN, bsds define _BIG_ENDIAN, _LITTLE_ENDIAN, BIG_ENDIAN, LITTLE_ENDIAN)
Definition in file endianness.h.
