_byteswap_uint64, _byteswap_ulong, _byteswap_ushort

Reverses the order of bytes in an integer.

Syntax

unsigned short _byteswap_ushort ( unsigned short val );
unsigned long _byteswap_ulong ( unsigned long val );
unsigned __int64 _byteswap_uint64 ( unsigned __int64 val );

Parameters

val
The integer to reverse byte order.

Requirements

Routine	Required header
_byteswap_ushort	<stdlib.h>
_byteswap_ulong	<stdlib.h>
_byteswap_uint64	<stdlib.h>

For more compatibility information, see Compatibility.

Example

// crt_byteswap.c
#include <stdlib.h>

int main()
{
   unsigned __int64 u64 = 0x0102030405060708;
   unsigned long ul = 0x01020304;

   printf("byteswap of %I64x = %I64x\n", u64, _byteswap_uint64(u64));
   printf("byteswap of %Ix = %Ix", ul, _byteswap_ulong(ul));
}

byteswap of 0102030405060708 = 0807060504030201
byteswap of 01020304 = 04030201

See also

Universal C runtime routines by category