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// Determine endianness.
// Follows http://wiki.debian.org/ArchitectureSpecificsMemo
#if !defined(__LITTLE_ENDIAN__) && !defined(__BIG_ENDIAN__)
#if defined(__avr32__) || defined(__hppa__) || defined(__m68k__) || \
defined(__mips__) || defined(__powerpc__) || defined(__s390__) || \
defined(__s390x__) || defined(__sparc__)
#define __BIG_ENDIAN__
#endif
#endif
typedef struct my_struct
{
// We hope these are 32 bit each on all architectures,
// and that there is no padding between them.
unsigned a;
unsigned b;
} t_logAppl;
static t_logAppl logAppl;
static unsigned char arrayTmp[8];
void CopyBuffer(unsigned char *src) {
int i;
for(i=0;i<8;i++){
arrayTmp[i] = src[i];
}
}
int main()
{
logAppl.a=1;
logAppl.b=0x01000002;
CopyBuffer((unsigned char *)&logAppl);
#ifdef __BIG_ENDIAN__
assert(arrayTmp[0]==0);
assert(arrayTmp[1]==0);
assert(arrayTmp[2]==0);
assert(arrayTmp[3]==1);
assert(arrayTmp[4]==1);
assert(arrayTmp[5]==0);
assert(arrayTmp[6]==0);
assert(arrayTmp[7]==2);
#else
// this is little endian
assert(arrayTmp[0]==1);
assert(arrayTmp[1]==0);
assert(arrayTmp[2]==0);
assert(arrayTmp[3]==0);
assert(arrayTmp[4]==2);
assert(arrayTmp[5]==0);
assert(arrayTmp[6]==0);
assert(arrayTmp[7]==1);
#endif
}
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