1d1d32c3dSAlex Richardson /*-
2d1d32c3dSAlex Richardson * SPDX-License-Identifier: BSD-2-Clause
3d1d32c3dSAlex Richardson *
4d1d32c3dSAlex Richardson * Copyright 2018-2020 Alex Richardson <arichardson@FreeBSD.org>
5d1d32c3dSAlex Richardson *
6d1d32c3dSAlex Richardson * This software was developed by SRI International and the University of
7d1d32c3dSAlex Richardson * Cambridge Computer Laboratory (Department of Computer Science and
8d1d32c3dSAlex Richardson * Technology) under DARPA contract HR0011-18-C-0016 ("ECATS"), as part of the
9d1d32c3dSAlex Richardson * DARPA SSITH research programme.
10d1d32c3dSAlex Richardson *
11d1d32c3dSAlex Richardson * This software was developed by SRI International and the University of
12d1d32c3dSAlex Richardson * Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
13d1d32c3dSAlex Richardson * ("CTSRD"), as part of the DARPA CRASH research programme.
14d1d32c3dSAlex Richardson *
15d1d32c3dSAlex Richardson * Redistribution and use in source and binary forms, with or without
16d1d32c3dSAlex Richardson * modification, are permitted provided that the following conditions
17d1d32c3dSAlex Richardson * are met:
18d1d32c3dSAlex Richardson * 1. Redistributions of source code must retain the above copyright
19d1d32c3dSAlex Richardson * notice, this list of conditions and the following disclaimer.
20d1d32c3dSAlex Richardson * 2. Redistributions in binary form must reproduce the above copyright
21d1d32c3dSAlex Richardson * notice, this list of conditions and the following disclaimer in the
22d1d32c3dSAlex Richardson * documentation and/or other materials provided with the distribution.
23d1d32c3dSAlex Richardson *
24d1d32c3dSAlex Richardson * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
25d1d32c3dSAlex Richardson * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26d1d32c3dSAlex Richardson * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27d1d32c3dSAlex Richardson * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
28d1d32c3dSAlex Richardson * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29d1d32c3dSAlex Richardson * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30d1d32c3dSAlex Richardson * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31d1d32c3dSAlex Richardson * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32d1d32c3dSAlex Richardson * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33d1d32c3dSAlex Richardson * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34d1d32c3dSAlex Richardson * SUCH DAMAGE.
35d1d32c3dSAlex Richardson */
36d1d32c3dSAlex Richardson #pragma once
37d1d32c3dSAlex Richardson
38d1d32c3dSAlex Richardson #include <machine/endian.h>
39d1d32c3dSAlex Richardson
40d1d32c3dSAlex Richardson #include <stdint.h>
41d1d32c3dSAlex Richardson
42d1d32c3dSAlex Richardson /*
43d1d32c3dSAlex Richardson * General byte order swapping functions.
44d1d32c3dSAlex Richardson */
45d1d32c3dSAlex Richardson #define bswap16(x) __builtin_bswap16(x)
46d1d32c3dSAlex Richardson #define bswap32(x) __builtin_bswap32(x)
47d1d32c3dSAlex Richardson #define bswap64(x) __builtin_bswap64(x)
48d1d32c3dSAlex Richardson
49d1d32c3dSAlex Richardson #define _BYTE_ORDER __DARWIN_BYTE_ORDER
50d1d32c3dSAlex Richardson #define _LITTLE_ENDIAN __DARWIN_LITTLE_ENDIAN
51d1d32c3dSAlex Richardson #define _BIG_ENDIAN __DARWIN_BIG_ENDIAN
52d1d32c3dSAlex Richardson /*
53d1d32c3dSAlex Richardson * Host to big endian, host to little endian, big endian to host, and little
54d1d32c3dSAlex Richardson * endian to host byte order functions as detailed in byteorder(9).
55d1d32c3dSAlex Richardson */
56d1d32c3dSAlex Richardson #if _BYTE_ORDER == _LITTLE_ENDIAN
57d1d32c3dSAlex Richardson #define htobe16(x) bswap16((x))
58d1d32c3dSAlex Richardson #define htobe32(x) bswap32((x))
59d1d32c3dSAlex Richardson #define htobe64(x) bswap64((x))
60d1d32c3dSAlex Richardson #define htole16(x) ((uint16_t)(x))
61d1d32c3dSAlex Richardson #define htole32(x) ((uint32_t)(x))
62d1d32c3dSAlex Richardson #define htole64(x) ((uint64_t)(x))
63d1d32c3dSAlex Richardson
64d1d32c3dSAlex Richardson #define be16toh(x) bswap16((x))
65d1d32c3dSAlex Richardson #define be32toh(x) bswap32((x))
66d1d32c3dSAlex Richardson #define be64toh(x) bswap64((x))
67d1d32c3dSAlex Richardson #define le16toh(x) ((uint16_t)(x))
68d1d32c3dSAlex Richardson #define le32toh(x) ((uint32_t)(x))
69d1d32c3dSAlex Richardson #define le64toh(x) ((uint64_t)(x))
70d1d32c3dSAlex Richardson #else /* _BYTE_ORDER != _LITTLE_ENDIAN */
71d1d32c3dSAlex Richardson #define htobe16(x) ((uint16_t)(x))
72d1d32c3dSAlex Richardson #define htobe32(x) ((uint32_t)(x))
73d1d32c3dSAlex Richardson #define htobe64(x) ((uint64_t)(x))
74d1d32c3dSAlex Richardson #define htole16(x) bswap16((x))
75d1d32c3dSAlex Richardson #define htole32(x) bswap32((x))
76d1d32c3dSAlex Richardson #define htole64(x) bswap64((x))
77d1d32c3dSAlex Richardson
78d1d32c3dSAlex Richardson #define be16toh(x) ((uint16_t)(x))
79d1d32c3dSAlex Richardson #define be32toh(x) ((uint32_t)(x))
80d1d32c3dSAlex Richardson #define be64toh(x) ((uint64_t)(x))
81d1d32c3dSAlex Richardson #define le16toh(x) bswap16((x))
82d1d32c3dSAlex Richardson #define le32toh(x) bswap32((x))
83d1d32c3dSAlex Richardson #define le64toh(x) bswap64((x))
84d1d32c3dSAlex Richardson #endif /* _BYTE_ORDER == _LITTLE_ENDIAN */
85d1d32c3dSAlex Richardson
86d1d32c3dSAlex Richardson /* Alignment-agnostic encode/decode bytestream to/from little/big endian. */
87d1d32c3dSAlex Richardson
88d1d32c3dSAlex Richardson static __inline uint16_t
be16dec(const void * pp)89d1d32c3dSAlex Richardson be16dec(const void *pp)
90d1d32c3dSAlex Richardson {
91d1d32c3dSAlex Richardson uint8_t const *p = (uint8_t const *)pp;
92d1d32c3dSAlex Richardson
93d1d32c3dSAlex Richardson return ((p[0] << 8) | p[1]);
94d1d32c3dSAlex Richardson }
95d1d32c3dSAlex Richardson
96d1d32c3dSAlex Richardson static __inline uint32_t
be32dec(const void * pp)97d1d32c3dSAlex Richardson be32dec(const void *pp)
98d1d32c3dSAlex Richardson {
99d1d32c3dSAlex Richardson uint8_t const *p = (uint8_t const *)pp;
100d1d32c3dSAlex Richardson
101d1d32c3dSAlex Richardson return (((unsigned)p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3]);
102d1d32c3dSAlex Richardson }
103d1d32c3dSAlex Richardson
104d1d32c3dSAlex Richardson static __inline uint64_t
be64dec(const void * pp)105d1d32c3dSAlex Richardson be64dec(const void *pp)
106d1d32c3dSAlex Richardson {
107d1d32c3dSAlex Richardson uint8_t const *p = (uint8_t const *)pp;
108d1d32c3dSAlex Richardson
109d1d32c3dSAlex Richardson return (((uint64_t)be32dec(p) << 32) | be32dec(p + 4));
110d1d32c3dSAlex Richardson }
111d1d32c3dSAlex Richardson
112d1d32c3dSAlex Richardson static __inline uint16_t
le16dec(const void * pp)113d1d32c3dSAlex Richardson le16dec(const void *pp)
114d1d32c3dSAlex Richardson {
115d1d32c3dSAlex Richardson uint8_t const *p = (uint8_t const *)pp;
116d1d32c3dSAlex Richardson
117d1d32c3dSAlex Richardson return ((p[1] << 8) | p[0]);
118d1d32c3dSAlex Richardson }
119d1d32c3dSAlex Richardson
120d1d32c3dSAlex Richardson static __inline uint32_t
le32dec(const void * pp)121d1d32c3dSAlex Richardson le32dec(const void *pp)
122d1d32c3dSAlex Richardson {
123d1d32c3dSAlex Richardson uint8_t const *p = (uint8_t const *)pp;
124d1d32c3dSAlex Richardson
125d1d32c3dSAlex Richardson return (((unsigned)p[3] << 24) | (p[2] << 16) | (p[1] << 8) | p[0]);
126d1d32c3dSAlex Richardson }
127d1d32c3dSAlex Richardson
128d1d32c3dSAlex Richardson static __inline uint64_t
le64dec(const void * pp)129d1d32c3dSAlex Richardson le64dec(const void *pp)
130d1d32c3dSAlex Richardson {
131d1d32c3dSAlex Richardson uint8_t const *p = (uint8_t const *)pp;
132d1d32c3dSAlex Richardson
133d1d32c3dSAlex Richardson return (((uint64_t)le32dec(p + 4) << 32) | le32dec(p));
134d1d32c3dSAlex Richardson }
135d1d32c3dSAlex Richardson
136d1d32c3dSAlex Richardson static __inline void
be16enc(void * pp,uint16_t u)137d1d32c3dSAlex Richardson be16enc(void *pp, uint16_t u)
138d1d32c3dSAlex Richardson {
139d1d32c3dSAlex Richardson uint8_t *p = (uint8_t *)pp;
140d1d32c3dSAlex Richardson
141d1d32c3dSAlex Richardson p[0] = (u >> 8) & 0xff;
142d1d32c3dSAlex Richardson p[1] = u & 0xff;
143d1d32c3dSAlex Richardson }
144d1d32c3dSAlex Richardson
145d1d32c3dSAlex Richardson static __inline void
be32enc(void * pp,uint32_t u)146d1d32c3dSAlex Richardson be32enc(void *pp, uint32_t u)
147d1d32c3dSAlex Richardson {
148d1d32c3dSAlex Richardson uint8_t *p = (uint8_t *)pp;
149d1d32c3dSAlex Richardson
150d1d32c3dSAlex Richardson p[0] = (u >> 24) & 0xff;
151d1d32c3dSAlex Richardson p[1] = (u >> 16) & 0xff;
152d1d32c3dSAlex Richardson p[2] = (u >> 8) & 0xff;
153d1d32c3dSAlex Richardson p[3] = u & 0xff;
154d1d32c3dSAlex Richardson }
155d1d32c3dSAlex Richardson
156d1d32c3dSAlex Richardson static __inline void
be64enc(void * pp,uint64_t u)157d1d32c3dSAlex Richardson be64enc(void *pp, uint64_t u)
158d1d32c3dSAlex Richardson {
159d1d32c3dSAlex Richardson uint8_t *p = (uint8_t *)pp;
160d1d32c3dSAlex Richardson
161d1d32c3dSAlex Richardson be32enc(p, (uint32_t)(u >> 32));
162d1d32c3dSAlex Richardson be32enc(p + 4, (uint32_t)(u & 0xffffffffU));
163d1d32c3dSAlex Richardson }
164d1d32c3dSAlex Richardson
165d1d32c3dSAlex Richardson static __inline void
le16enc(void * pp,uint16_t u)166d1d32c3dSAlex Richardson le16enc(void *pp, uint16_t u)
167d1d32c3dSAlex Richardson {
168d1d32c3dSAlex Richardson uint8_t *p = (uint8_t *)pp;
169d1d32c3dSAlex Richardson
170d1d32c3dSAlex Richardson p[0] = u & 0xff;
171d1d32c3dSAlex Richardson p[1] = (u >> 8) & 0xff;
172d1d32c3dSAlex Richardson }
173d1d32c3dSAlex Richardson
174d1d32c3dSAlex Richardson static __inline void
le32enc(void * pp,uint32_t u)175d1d32c3dSAlex Richardson le32enc(void *pp, uint32_t u)
176d1d32c3dSAlex Richardson {
177d1d32c3dSAlex Richardson uint8_t *p = (uint8_t *)pp;
178d1d32c3dSAlex Richardson
179d1d32c3dSAlex Richardson p[0] = u & 0xff;
180d1d32c3dSAlex Richardson p[1] = (u >> 8) & 0xff;
181d1d32c3dSAlex Richardson p[2] = (u >> 16) & 0xff;
182d1d32c3dSAlex Richardson p[3] = (u >> 24) & 0xff;
183d1d32c3dSAlex Richardson }
184d1d32c3dSAlex Richardson
185d1d32c3dSAlex Richardson static __inline void
le64enc(void * pp,uint64_t u)186d1d32c3dSAlex Richardson le64enc(void *pp, uint64_t u)
187d1d32c3dSAlex Richardson {
188d1d32c3dSAlex Richardson uint8_t *p = (uint8_t *)pp;
189d1d32c3dSAlex Richardson
190d1d32c3dSAlex Richardson le32enc(p, (uint32_t)(u & 0xffffffffU));
191d1d32c3dSAlex Richardson le32enc(p + 4, (uint32_t)(u >> 32));
192d1d32c3dSAlex Richardson }
193