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 #ifndef __LIBARCHIVE_BUILD
32 #error This header is only to be used internally to libarchive.
35 /* Note: This is a purely internal header! */
36 /* Do not use this outside of libarchive internal code! */
38 #ifndef ARCHIVE_ENDIAN_H_INCLUDED
39 #define ARCHIVE_ENDIAN_H_INCLUDED
43 * Disabling inline keyword for compilers known to choke on it:
44 * - Watcom C++ in C code. (For any version?)
46 * - Microsoft Visual C++ 6.0 (supposedly newer versions too)
48 #if defined(__WATCOMC__) || defined(__sgi) || defined(__hpux) || defined(__BORLANDC__)
50 #elif defined(_MSC_VER)
51 #define inline __inline
54 /* Alignment-agnostic encode/decode bytestream to/from little/big endian. */
56 static inline uint16_t
57 archive_be16dec(const void *pp)
59 unsigned char const *p = (unsigned char const *)pp;
61 return ((p[0] << 8) | p[1]);
64 static inline uint32_t
65 archive_be32dec(const void *pp)
67 unsigned char const *p = (unsigned char const *)pp;
69 return ((p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3]);
72 static inline uint64_t
73 archive_be64dec(const void *pp)
75 unsigned char const *p = (unsigned char const *)pp;
77 return (((uint64_t)archive_be32dec(p) << 32) | archive_be32dec(p + 4));
80 static inline uint16_t
81 archive_le16dec(const void *pp)
83 unsigned char const *p = (unsigned char const *)pp;
85 return ((p[1] << 8) | p[0]);
88 static inline uint32_t
89 archive_le32dec(const void *pp)
91 unsigned char const *p = (unsigned char const *)pp;
93 return ((p[3] << 24) | (p[2] << 16) | (p[1] << 8) | p[0]);
96 static inline uint64_t
97 archive_le64dec(const void *pp)
99 unsigned char const *p = (unsigned char const *)pp;
101 return (((uint64_t)archive_le32dec(p + 4) << 32) | archive_le32dec(p));
105 archive_be16enc(void *pp, uint16_t u)
107 unsigned char *p = (unsigned char *)pp;
109 p[0] = (u >> 8) & 0xff;
114 archive_be32enc(void *pp, uint32_t u)
116 unsigned char *p = (unsigned char *)pp;
118 p[0] = (u >> 24) & 0xff;
119 p[1] = (u >> 16) & 0xff;
120 p[2] = (u >> 8) & 0xff;
125 archive_be64enc(void *pp, uint64_t u)
127 unsigned char *p = (unsigned char *)pp;
129 archive_be32enc(p, (uint32_t)(u >> 32));
130 archive_be32enc(p + 4, (uint32_t)(u & 0xffffffff));
134 archive_le16enc(void *pp, uint16_t u)
136 unsigned char *p = (unsigned char *)pp;
139 p[1] = (u >> 8) & 0xff;
143 archive_le32enc(void *pp, uint32_t u)
145 unsigned char *p = (unsigned char *)pp;
148 p[1] = (u >> 8) & 0xff;
149 p[2] = (u >> 16) & 0xff;
150 p[3] = (u >> 24) & 0xff;
154 archive_le64enc(void *pp, uint64_t u)
156 unsigned char *p = (unsigned char *)pp;
158 archive_le32enc(p, (uint32_t)(u & 0xffffffff));
159 archive_le32enc(p + 4, (uint32_t)(u >> 32));