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/*
* Copyright (c) 2008, 2010 Nicira Networks.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may 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.
*/
#ifndef BYTE_ORDER_H
#define BYTE_ORDER_H 1
#include <arpa/inet.h>
#include <sys/types.h>
#include <inttypes.h>
static inline uint64_t
htonll(uint64_t n)
{
return htonl(1) == 1 ? n : ((uint64_t) htonl(n) << 32) | htonl(n >> 32);
}
static inline uint64_t
ntohll(uint64_t n)
{
return htonl(1) == 1 ? n : ((uint64_t) ntohl(n) << 32) | ntohl(n >> 32);
}
/* These macros may substitute for htons(), htonl(), and htonll() in contexts
* where function calls are not allowed, such as case labels. They should not
* be used elsewhere because all of them evaluate their argument many times. */
#ifdef WORDS_BIGENDIAN
#define CONSTANT_HTONS(VALUE) ((uint16_t) (VALUE))
#define CONSTANT_HTONL(VALUE) ((uint32_t) (VALUE))
#define CONSTANT_HTONLL(VALUE) ((uint64_t) (VALUE))
#else
#define CONSTANT_HTONS(VALUE) \
(((((uint16_t) (VALUE)) & 0xff00) >> 8) | \
((((uint16_t) (VALUE)) & 0x00ff) << 8))
#define CONSTANT_HTONL(VALUE) \
(((((uint32_t) (VALUE)) & 0x000000ff) << 24) | \
((((uint32_t) (VALUE)) & 0x0000ff00) << 8) | \
((((uint32_t) (VALUE)) & 0x00ff0000) >> 8) | \
((((uint32_t) (VALUE)) & 0xff000000) >> 24))
#define CONSTANT_HTONLL(VALUE) \
(((((uint64_t) (VALUE)) & UINT64_C(0x00000000000000ff)) << 56) | \
((((uint64_t) (VALUE)) & UINT64_C(0x000000000000ff00)) << 40) | \
((((uint64_t) (VALUE)) & UINT64_C(0x0000000000ff0000)) << 24) | \
((((uint64_t) (VALUE)) & UINT64_C(0x00000000ff000000)) << 8) | \
((((uint64_t) (VALUE)) & UINT64_C(0x000000ff00000000)) >> 8) | \
((((uint64_t) (VALUE)) & UINT64_C(0x0000ff0000000000)) >> 24) | \
((((uint64_t) (VALUE)) & UINT64_C(0x00ff000000000000)) >> 40) | \
((((uint64_t) (VALUE)) & UINT64_C(0xff00000000000000)) >> 56))
#endif
#endif /* byte-order.h */
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