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compat/endian.h
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/* | |||||
* dhcpcd - DHCP client daemon | |||||
* Copyright (c) 2006-2014 Roy Marples <roy@marples.name> | |||||
* All rights reserved | |||||
* Redistribution and use in source and binary forms, with or without | |||||
* modification, are permitted provided that the following conditions | |||||
* are met: | |||||
* 1. Redistributions of source code must retain the above copyright | |||||
* notice, this list of conditions and the following disclaimer. | |||||
* 2. Redistributions in binary form must reproduce the above copyright | |||||
* notice, this list of conditions and the following disclaimer in the | |||||
* documentation and/or other materials provided with the distribution. | |||||
* | |||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND | |||||
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |||||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |||||
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE | |||||
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |||||
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |||||
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |||||
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |||||
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |||||
* SUCH DAMAGE. | |||||
*/ | |||||
#ifndef ENDIAN_H | |||||
#define ENDIAN_H | |||||
#include <stdint.h> | |||||
inline static void | |||||
be32enc(uint8_t *buf, uint32_t u) | |||||
{ | |||||
buf[0] = (uint8_t)((u >> 24) & 0xff); | |||||
buf[1] = (uint8_t)((u >> 16) & 0xff); | |||||
buf[2] = (uint8_t)((u >> 8) & 0xff); | |||||
buf[3] = (uint8_t)(u & 0xff); | |||||
} | |||||
inline static void | |||||
be64enc(uint8_t *buf, uint64_t u) | |||||
{ | |||||
be32enc(buf, (uint32_t)(u >> 32)); | |||||
be32enc(buf + sizeof(uint32_t), (uint32_t)(u & 0xffffffffULL)); | |||||
} | |||||
inline static uint16_t | |||||
be16dec(const uint8_t *buf) | |||||
{ | |||||
return (uint16_t)(buf[0] << 8 | buf[1]); | |||||
} | |||||
inline static uint32_t | |||||
be32dec(const uint8_t *buf) | |||||
{ | |||||
return (uint32_t)((uint32_t)be16dec(buf) << 16 | be16dec(buf + 2)); | |||||
} | |||||
inline static uint64_t | |||||
be64dec(const uint8_t *buf) | |||||
{ | |||||
return (uint64_t)((uint64_t)be32dec(buf) << 32 | be32dec(buf + 4)); | |||||
} | |||||
#endif |