| /* Macros to swap the order of bytes in 16-bit integer values. | 
 |    Copyright (C) 2012-2016 Free Software Foundation, Inc. | 
 |    This file is part of the GNU C Library. | 
 |  | 
 |    The GNU C Library is free software; you can redistribute it and/or | 
 |    modify it under the terms of the GNU Lesser General Public | 
 |    License as published by the Free Software Foundation; either | 
 |    version 2.1 of the License, or (at your option) any later version. | 
 |  | 
 |    The GNU C Library is distributed in the hope that it will be useful, | 
 |    but WITHOUT ANY WARRANTY; without even the implied warranty of | 
 |    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU | 
 |    Lesser General Public License for more details. | 
 |  | 
 |    You should have received a copy of the GNU Lesser General Public | 
 |    License along with the GNU C Library; if not, see | 
 |    <http://www.gnu.org/licenses/>.  */ | 
 |  | 
 | #ifndef _BITS_BYTESWAP_H | 
 | # error "Never use <bits/byteswap-16.h> directly; include <byteswap.h> instead." | 
 | #endif | 
 |  | 
 | #ifdef __GNUC__ | 
 | # define __bswap_16(x) \ | 
 |     (__extension__							      \ | 
 |      ({ unsigned short int __bsx = (unsigned short int) (x);		      \ | 
 |        __bswap_constant_16 (__bsx); })) | 
 | #else | 
 | static __inline unsigned short int | 
 | __bswap_16 (unsigned short int __bsx) | 
 | { | 
 |   return __bswap_constant_16 (__bsx); | 
 | } | 
 | #endif |