Here is a small code segment to determine the endianess of a system at run time.

short int number = 0x1;
char *byte = (char*)&number;
if ( byte[0] )
printf("Little endian");
else
printf("Big endian");

Submitted by Pooja Agrawal (poojas@gmail.com)

unsigned int a = 0x01;
a = a>>1;
if(a){
printf("little endian");
}else{
printf("big endian");
}

unsigned char device_set_flag=0x01;

if((device_set_flag >> 1) & 0x01)
// little endian
else
// big endian

int number = 0x01;
if ( (number | 0xff) == 0x01 )
printf("Little endian");
else
printf("Big endian");

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