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: head/lib/libarchive/archive_endian.h 201085 2009-12-28 02:17:15Z kientzle $
27 *
28 * Borrowed from FreeBSD's <sys/endian.h>
29 */
30
31 #ifndef __LIBARCHIVE_BUILD
32 #error This header is only to be used internally to libarchive.
33 #endif
34
35 /* Note: This is a purely internal header! */
36 /* Do not use this outside of libarchive internal code! */
37
38 #ifndef ARCHIVE_ENDIAN_H_INCLUDED
39 #define ARCHIVE_ENDIAN_H_INCLUDED
40
41
42 /*
43 * Disabling inline keyword for compilers known to choke on it:
44 * - Watcom C++ in C code. (For any version?)
45 * - SGI MIPSpro
46 * - Microsoft Visual C++ 6.0 (supposedly newer versions too)
47 */
48 #if defined(__WATCOMC__) || defined(__sgi) || defined(__hpux) || defined(__BORLANDC__)
49 #define inline
50 #elif defined(_MSC_VER)
51 #define inline __inline
52 #endif
53
54 /* Alignment-agnostic encode/decode bytestream to/from little/big endian. */
55
56 static inline uint16_t
archive_be16dec(const void * pp)57 archive_be16dec(const void *pp)
58 {
59 unsigned char const *p = (unsigned char const *)pp;
60
61 return ((p[0] << 8) | p[1]);
62 }
63
64 static inline uint32_t
archive_be32dec(const void * pp)65 archive_be32dec(const void *pp)
66 {
67 unsigned char const *p = (unsigned char const *)pp;
68
69 return ((p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3]);
70 }
71
72 static inline uint64_t
archive_be64dec(const void * pp)73 archive_be64dec(const void *pp)
74 {
75 unsigned char const *p = (unsigned char const *)pp;
76
77 return (((uint64_t)archive_be32dec(p) << 32) | archive_be32dec(p + 4));
78 }
79
80 static inline uint16_t
archive_le16dec(const void * pp)81 archive_le16dec(const void *pp)
82 {
83 unsigned char const *p = (unsigned char const *)pp;
84
85 return ((p[1] << 8) | p[0]);
86 }
87
88 static inline uint32_t
archive_le32dec(const void * pp)89 archive_le32dec(const void *pp)
90 {
91 unsigned char const *p = (unsigned char const *)pp;
92
93 return ((p[3] << 24) | (p[2] << 16) | (p[1] << 8) | p[0]);
94 }
95
96 static inline uint64_t
archive_le64dec(const void * pp)97 archive_le64dec(const void *pp)
98 {
99 unsigned char const *p = (unsigned char const *)pp;
100
101 return (((uint64_t)archive_le32dec(p + 4) << 32) | archive_le32dec(p));
102 }
103
104 static inline void
archive_be16enc(void * pp,uint16_t u)105 archive_be16enc(void *pp, uint16_t u)
106 {
107 unsigned char *p = (unsigned char *)pp;
108
109 p[0] = (u >> 8) & 0xff;
110 p[1] = u & 0xff;
111 }
112
113 static inline void
archive_be32enc(void * pp,uint32_t u)114 archive_be32enc(void *pp, uint32_t u)
115 {
116 unsigned char *p = (unsigned char *)pp;
117
118 p[0] = (u >> 24) & 0xff;
119 p[1] = (u >> 16) & 0xff;
120 p[2] = (u >> 8) & 0xff;
121 p[3] = u & 0xff;
122 }
123
124 static inline void
archive_be64enc(void * pp,uint64_t u)125 archive_be64enc(void *pp, uint64_t u)
126 {
127 unsigned char *p = (unsigned char *)pp;
128
129 archive_be32enc(p, u >> 32);
130 archive_be32enc(p + 4, u & 0xffffffff);
131 }
132
133 static inline void
archive_le16enc(void * pp,uint16_t u)134 archive_le16enc(void *pp, uint16_t u)
135 {
136 unsigned char *p = (unsigned char *)pp;
137
138 p[0] = u & 0xff;
139 p[1] = (u >> 8) & 0xff;
140 }
141
142 static inline void
archive_le32enc(void * pp,uint32_t u)143 archive_le32enc(void *pp, uint32_t u)
144 {
145 unsigned char *p = (unsigned char *)pp;
146
147 p[0] = u & 0xff;
148 p[1] = (u >> 8) & 0xff;
149 p[2] = (u >> 16) & 0xff;
150 p[3] = (u >> 24) & 0xff;
151 }
152
153 static inline void
archive_le64enc(void * pp,uint64_t u)154 archive_le64enc(void *pp, uint64_t u)
155 {
156 unsigned char *p = (unsigned char *)pp;
157
158 archive_le32enc(p, u & 0xffffffff);
159 archive_le32enc(p + 4, u >> 32);
160 }
161
162 #endif
163