2 * Copyright (c) 2002 Thomas Moestl <tmm@FreeBSD.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
28 * Borrowed from FreeBSD's <sys/endian.h>
31 /* Note: This is a purely internal header! */
32 /* Do not use this outside of libarchive internal code! */
34 #ifndef ARCHIVE_ENDIAN_H_INCLUDED
35 #define ARCHIVE_ENDIAN_H_INCLUDED
39 * Disabling inline keyword for compilers known to choke on it:
40 * - Watcom C++ in C code. (For any version?)
42 * - Microsoft Visual C++ 6.0 (supposedly newer versions too)
44 #if defined(__WATCOMC__) || defined(__sgi)
46 #elif defined(_MSC_VER)
47 #define inline __inline
50 /* Alignment-agnostic encode/decode bytestream to/from little/big endian. */
52 static inline uint16_t
53 archive_be16dec(const void *pp)
55 unsigned char const *p = (unsigned char const *)pp;
57 return ((p[0] << 8) | p[1]);
60 static inline uint32_t
61 archive_be32dec(const void *pp)
63 unsigned char const *p = (unsigned char const *)pp;
65 return ((p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3]);
68 static inline uint64_t
69 archive_be64dec(const void *pp)
71 unsigned char const *p = (unsigned char const *)pp;
73 return (((uint64_t)archive_be32dec(p) << 32) | archive_be32dec(p + 4));
76 static inline uint16_t
77 archive_le16dec(const void *pp)
79 unsigned char const *p = (unsigned char const *)pp;
81 return ((p[1] << 8) | p[0]);
84 static inline uint32_t
85 archive_le32dec(const void *pp)
87 unsigned char const *p = (unsigned char const *)pp;
89 return ((p[3] << 24) | (p[2] << 16) | (p[1] << 8) | p[0]);
92 static inline uint64_t
93 archive_le64dec(const void *pp)
95 unsigned char const *p = (unsigned char const *)pp;
97 return (((uint64_t)archive_le32dec(p + 4) << 32) | archive_le32dec(p));
101 archive_be16enc(void *pp, uint16_t u)
103 unsigned char *p = (unsigned char *)pp;
105 p[0] = (u >> 8) & 0xff;
110 archive_be32enc(void *pp, uint32_t u)
112 unsigned char *p = (unsigned char *)pp;
114 p[0] = (u >> 24) & 0xff;
115 p[1] = (u >> 16) & 0xff;
116 p[2] = (u >> 8) & 0xff;
121 archive_be64enc(void *pp, uint64_t u)
123 unsigned char *p = (unsigned char *)pp;
125 archive_be32enc(p, u >> 32);
126 archive_be32enc(p + 4, u & 0xffffffff);
130 archive_le16enc(void *pp, uint16_t u)
132 unsigned char *p = (unsigned char *)pp;
135 p[1] = (u >> 8) & 0xff;
139 archive_le32enc(void *pp, uint32_t u)
141 unsigned char *p = (unsigned char *)pp;
144 p[1] = (u >> 8) & 0xff;
145 p[2] = (u >> 16) & 0xff;
146 p[3] = (u >> 24) & 0xff;
150 archive_le64enc(void *pp, uint64_t u)
152 unsigned char *p = (unsigned char *)pp;
154 archive_le32enc(p, u & 0xffffffff);
155 archive_le32enc(p + 4, u >> 32);