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/**************************************************************************
*
* Copyright (c) 2013 Alcatel-Lucent
*
* Alcatel Lucent licenses this file to You under the Apache License,
* Version 2.0 (the "License"); you may not use this file except in
* compliance with the License. A copy of the License is contained the
* file LICENSE at the top level of this repository.
* You may also obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
**************************************************************************
*
* endian.h:
*
* macros used for endian conversion.
* The intent is that the macros have nil effect on Big_Endian systems...
*
* ecs: endian-convert short
* ecl: endian-convert long
*
* Original author: Ed Sutter (ed.sutter@alcatel-lucent.com)
*
*/
#ifndef _ENDIAN_H_
#define _ENDIAN_H_
#ifdef CPU_LE
#define ecs(a) (((a & 0x00ff) << 8) | ((a & 0xff00) >> 8))
#define ecl(a) (((a & 0x000000ff) << 24) | ((a & 0x0000ff00) << 8) | \
((a & 0x00ff0000) >> 8) | ((a & 0xff000000) >> 24))
#define self_ecs(a) (a = ecs(a))
#define self_ecl(a) (a = ecl(a))
#define ntohl ecl
#define ntohs ecs
#define htonl ecl
#define htons ecs
#else
#ifdef CPU_BE
#define ecs(a) a
#define ecl(a) a
#define self_ecs(a)
#define self_ecl(a)
#define ntohl(a) a
#define ntohs(a) a
#define htonl(a) a
#define htons(a) a
#else
#error You need to define CPU_BE or CPU_LE in config.h!
#endif /* else ifdef CPU_BE */
#endif /* ifdef CPU_LE */
/* just to be safe...
*/
#ifdef CPU_LE
#ifdef CPU_BE
#error You have both CPU_BE and CPU_LE defined. Pick one!
#endif
#endif
#endif
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