blob bc80c40be749ddedf33ec3ba707d9f32296bb158 1038 bytes (raw)
name: util/endian-util.h # note: path name is non-authoritative(*)
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| | /* this file mimics the macros present in recent GCC and CLANG */
#ifndef _ENDIAN_UTIL_H
#define _ENDIAN_UTIL_H
/* This are prefixed with UTIL to avoid collisions
*
* You can use something like the following to define UTIL_BYTE_ORDER
* in a configure script.
*/
#if 0
#include <stdio.h>
#include <stdint.h>
uint32_t test = 0x34333231;
int main() { printf("%.4s\n", (const char*)&test); return 0; }
#endif
#define UTIL_ORDER_BIG_ENDIAN 4321
#define UTIL_ORDER_LITTLE_ENDIAN 1234
#if !defined(UTIL_BYTE_ORDER) || ((UTIL_BYTE_ORDER != UTIL_ORDER_BIG_ENDIAN) && \
(UTIL_BYTE_ORDER != UTIL_ORDER_LITTLE_ENDIAN))
#undef UTIL_BYTE_ORDER
#ifdef __BYTE_ORDER__
# if (__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__)
# define UTIL_BYTE_ORDER UTIL_ORDER_LITTLE_ENDIAN
# elif (__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__)
# define UTIL_BYTE_ORDER UTIL_ORDER_BIG_ENDIAN
# else
# error "Unsupported __BYTE_ORDER__"
# endif
#else
# error "UTIL_BYTE_ORDER not correctly defined and __BYTE_ORDER__ not defined."
#endif
#endif
#endif
|
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