1 /* 2 * dhcpcd - DHCP client daemon 3 * Copyright (c) 2006-2014 Roy Marples <roy (at) marples.name> 4 * All rights reserved 5 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #ifndef ENDIAN_H 29 #define ENDIAN_H 30 31 #include <stdint.h> 32 33 inline static void 34 be32enc(uint8_t *buf, uint32_t u) 35 { 36 37 buf[0] = (uint8_t)((u >> 24) & 0xff); 38 buf[1] = (uint8_t)((u >> 16) & 0xff); 39 buf[2] = (uint8_t)((u >> 8) & 0xff); 40 buf[3] = (uint8_t)(u & 0xff); 41 } 42 43 inline static void 44 be64enc(uint8_t *buf, uint64_t u) 45 { 46 47 be32enc(buf, (uint32_t)(u >> 32)); 48 be32enc(buf + sizeof(uint32_t), (uint32_t)(u & 0xffffffffULL)); 49 } 50 51 inline static uint16_t 52 be16dec(const uint8_t *buf) 53 { 54 55 return (uint16_t)(buf[0] << 8 | buf[1]); 56 } 57 58 inline static uint32_t 59 be32dec(const uint8_t *buf) 60 { 61 62 return (uint32_t)((uint32_t)be16dec(buf) << 16 | be16dec(buf + 2)); 63 } 64 65 inline static uint64_t 66 be64dec(const uint8_t *buf) 67 { 68 69 return (uint64_t)((uint64_t)be32dec(buf) << 32 | be32dec(buf + 4)); 70 } 71 #endif 72
