int is_bigendian() { static int i=1; return (int)(*(char *)&i); }
Oh heck, go all the way:
From: Marc W. Mengel [[EMAIL PROTECTED]]
Sent: Tuesday, March 16, 1999 4:25 PM
To: xxxx
Subject: From the dim-and-musty department
Someone wanted this a while back, and I had occasion to find it and touch
it up a bit recently to handle 64-bit stuff. I'm actually not sure if
I have the pdp-endian right anymore, so if anyone still has one around :-)
- - - - - - - - - - - - - cut here - - - - - - - - - - - - - - - - -
#include <stdio.h>
/*
* note the apparently unneccesary nested switch statements -- this
* is to prevent "duplicate case in switch" errors on small-word machines.."
*/
void
printbyteorder() {
int i;
long l;
i = *((int *)"01234567");
l = *((long *)"01234567");
switch ((long)i) {
case 0x00010203L: printf("int 32bit-big-endian\n");break;
case 0x03020100L: printf("int 32bit-little-endian\n");break;
case 0x30313233L: printf("int 32bit-big-endian\n"); break;
case 0x33323130L: printf("int 32bit-little-endian\n");break;
case 0x32333031L: printf("int 32bit-pdp-ian\n"); break;
default:
switch((long)i){
case 0x3031323334353637L:printf("int 64bit-big-endian\n");break;
case 0x3736353433323130L:printf("int 64bit-little-endian\n");break;
default: printf("int bizarre %x-order", i); break;
}
break;
}
switch (l) {
case 0x00010203L: printf("long 32bit-big-endian\n");break;
case 0x03020100L: printf("long 32bit-little-endian\n");break;
case 0x30313233L: printf("long 32bit-big-endian\n"); break;
case 0x33323130L: printf("long 32bit-little-endian\n");break;
case 0x32333031L: printf("long 32bit-pdp-ian\n"); break;
default:
switch(l){
case 0x3031323334353637L:printf("int 64bit-big-endian\n");break;
case 0x3736353433323130L:printf("int 64bit-little-endian\n");break;
default: printf("int bizarre %x-order", l);break;
}
break;
}
}
main(){
printbyteorder();
}
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