xref: /freebsd/usr.bin/mkimg/endian.h (revision 123af6ec70016f5556da5972d4d63c7d175c06d3)
1 /*-
2  * Copyright (c) 2002 Thomas Moestl <tmm@FreeBSD.org>
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in the
12  *    documentation and/or other materials provided with the distribution.
13  *
14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24  * SUCH DAMAGE.
25  *
26  * $FreeBSD$
27  */
28 
29 #ifndef _MKIMG_ENDIAN_H_
30 #define _MKIMG_ENDIAN_H_
31 
32 #include <stdint.h>
33 
34 static __inline uint16_t
35 be16dec(const void *pp)
36 {
37 	uint8_t const *p = (uint8_t const *)pp;
38 
39 	return ((p[0] << 8) | p[1]);
40 }
41 
42 static __inline void
43 be16enc(void *pp, uint16_t u)
44 {
45 	uint8_t *p = (uint8_t *)pp;
46 
47 	p[0] = (u >> 8) & 0xff;
48 	p[1] = u & 0xff;
49 }
50 
51 static __inline void
52 be32enc(void *pp, uint32_t u)
53 {
54 	uint8_t *p = (uint8_t *)pp;
55 
56 	p[0] = (u >> 24) & 0xff;
57 	p[1] = (u >> 16) & 0xff;
58 	p[2] = (u >> 8) & 0xff;
59 	p[3] = u & 0xff;
60 }
61 
62 static __inline void
63 be64enc(void *pp, uint64_t u)
64 {
65 	uint8_t *p = (uint8_t *)pp;
66 
67 	be32enc(p, (uint32_t)(u >> 32));
68 	be32enc(p + 4, (uint32_t)(u & 0xffffffffU));
69 }
70 
71 static __inline uint16_t
72 le16dec(const void *pp)
73 {
74 	uint8_t const *p = (uint8_t const *)pp;
75 
76 	return ((p[1] << 8) | p[0]);
77 }
78 
79 static __inline void
80 le16enc(void *pp, uint16_t u)
81 {
82 	uint8_t *p = (uint8_t *)pp;
83 
84 	p[0] = u & 0xff;
85 	p[1] = (u >> 8) & 0xff;
86 }
87 
88 static __inline void
89 le32enc(void *pp, uint32_t u)
90 {
91 	uint8_t *p = (uint8_t *)pp;
92 
93 	p[0] = u & 0xff;
94 	p[1] = (u >> 8) & 0xff;
95 	p[2] = (u >> 16) & 0xff;
96 	p[3] = (u >> 24) & 0xff;
97 }
98 
99 static __inline void
100 le64enc(void *pp, uint64_t u)
101 {
102 	uint8_t *p = (uint8_t *)pp;
103 
104 	le32enc(p, (uint32_t)(u & 0xffffffffU));
105 	le32enc(p + 4, (uint32_t)(u >> 32));
106 }
107 
108 #endif /* _MKIMG_ENDIAN_H_ */
109