byteswap-uint64-byteswap-ulong-byteswap-ushort.md

description	title	ms.date	api_name	api_location	api_type	topic_type	f1_keywords	helpviewer_keywords	ms.assetid
Learn more about: _byteswap_uint64, _byteswap_ulong, _byteswap_ushort	_byteswap_uint64, _byteswap_ulong, _byteswap_ushort	11/04/2016	_byteswap_uint64 _byteswap_ulong _byteswap_ushort	msvcrt.dll msvcr80.dll msvcr90.dll msvcr100.dll msvcr100_clr0400.dll msvcr110.dll msvcr110_clr0400.dll msvcr120.dll msvcr120_clr0400.dll ucrtbase.dll api-ms-win-crt-utility-l1-1-0.dll	DLLExport	apiref	byteswap_ulong _byteswap_ulong byteswap_uint64 _byteswap_ushort _byteswap_uint64 byteswap_ushort	_byteswap_uint64 function byteswap_uint64 function swapping bytes byte swapping byteswap_ushort function _byteswap_ushort function bytes, swapping byteswap_ulong function _byteswap_ulong function	83bda211-f02f-4cf0-8a78-d6de1f175970

_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