MdePkg/Library/BaseLib/SwapBytes16.c

   1 /** @file
   2   Math worker functions.
   3
   4   Copyright (c) 2006 - 2008, Intel Corporation<BR>
   5   All rights reserved. This program and the accompanying materials
   6   are licensed and made available under the terms and conditions of the BSD License
   7   which accompanies this distribution.  The full text of the license may be found at
   8   http://opensource.org/licenses/bsd-license.php
   9
  10   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12
  13 **/
  14
  15
  16
  17
  18 #include "BaseLibInternals.h"
  19
  20 /**
  21   Switches the endianess of a 16-bit integer.
  22
  23   This function swaps the bytes in a 16-bit unsigned value to switch the value
  24   from little endian to big endian or vice versa. The byte swapped value is
  25   returned.
  26
  27   @param  Value A 16-bit unsigned value.
  28
  29   @return The byte swapped Value.
  30
  31 **/
  32 UINT16
  33 EFIAPI
  34 SwapBytes16 (
  35   IN      UINT16                    Value
  36   )
  37 {
  38   return (UINT16) ((Value<< 8) | (Value>> 8));
  39 }