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: src/lib/libarchive/archive_endian.h,v 1.4 2008/12/06 06:12:24 kientzle Exp $ 27 * 28 * Borrowed from FreeBSD's <sys/endian.h> 29 */ 30 31 /* Note: This is a purely internal header! */ 32 /* Do not use this outside of libarchive internal code! */ 33 34 #ifndef ARCHIVE_ENDIAN_H_INCLUDED 35 #define ARCHIVE_ENDIAN_H_INCLUDED 36 37 38 /* 39 * Disabling inline keyword for compilers known to choke on it: 40 * - Watcom C++ in C code. (For any version?) 41 * - SGI MIPSpro 42 * - Microsoft Visual C++ 6.0 (supposedly newer versions too) 43 */ 44 #if defined(__WATCOMC__) || defined(__sgi) 45 #define inline 46 #elif defined(_MSC_VER) 47 #define inline __inline 48 #endif 49 50 /* Alignment-agnostic encode/decode bytestream to/from little/big endian. */ 51 52 static inline uint16_t 53 archive_be16dec(const void *pp) 54 { 55 unsigned char const *p = (unsigned char const *)pp; 56 57 return ((p[0] << 8) | p[1]); 58 } 59 60 static inline uint32_t 61 archive_be32dec(const void *pp) 62 { 63 unsigned char const *p = (unsigned char const *)pp; 64 65 return ((p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3]); 66 } 67 68 static inline uint64_t 69 archive_be64dec(const void *pp) 70 { 71 unsigned char const *p = (unsigned char const *)pp; 72 73 return (((uint64_t)archive_be32dec(p) << 32) | archive_be32dec(p + 4)); 74 } 75 76 static inline uint16_t 77 archive_le16dec(const void *pp) 78 { 79 unsigned char const *p = (unsigned char const *)pp; 80 81 return ((p[1] << 8) | p[0]); 82 } 83 84 static inline uint32_t 85 archive_le32dec(const void *pp) 86 { 87 unsigned char const *p = (unsigned char const *)pp; 88 89 return ((p[3] << 24) | (p[2] << 16) | (p[1] << 8) | p[0]); 90 } 91 92 static inline uint64_t 93 archive_le64dec(const void *pp) 94 { 95 unsigned char const *p = (unsigned char const *)pp; 96 97 return (((uint64_t)archive_le32dec(p + 4) << 32) | archive_le32dec(p)); 98 } 99 100 static inline void 101 archive_be16enc(void *pp, uint16_t u) 102 { 103 unsigned char *p = (unsigned char *)pp; 104 105 p[0] = (u >> 8) & 0xff; 106 p[1] = u & 0xff; 107 } 108 109 static inline void 110 archive_be32enc(void *pp, uint32_t u) 111 { 112 unsigned char *p = (unsigned char *)pp; 113 114 p[0] = (u >> 24) & 0xff; 115 p[1] = (u >> 16) & 0xff; 116 p[2] = (u >> 8) & 0xff; 117 p[3] = u & 0xff; 118 } 119 120 static inline void 121 archive_be64enc(void *pp, uint64_t u) 122 { 123 unsigned char *p = (unsigned char *)pp; 124 125 archive_be32enc(p, u >> 32); 126 archive_be32enc(p + 4, u & 0xffffffff); 127 } 128 129 static inline void 130 archive_le16enc(void *pp, uint16_t u) 131 { 132 unsigned char *p = (unsigned char *)pp; 133 134 p[0] = u & 0xff; 135 p[1] = (u >> 8) & 0xff; 136 } 137 138 static inline void 139 archive_le32enc(void *pp, uint32_t u) 140 { 141 unsigned char *p = (unsigned char *)pp; 142 143 p[0] = u & 0xff; 144 p[1] = (u >> 8) & 0xff; 145 p[2] = (u >> 16) & 0xff; 146 p[3] = (u >> 24) & 0xff; 147 } 148 149 static inline void 150 archive_le64enc(void *pp, uint64_t u) 151 { 152 unsigned char *p = (unsigned char *)pp; 153 154 archive_le32enc(p, u & 0xffffffff); 155 archive_le32enc(p + 4, u >> 32); 156 } 157 158 #endif 159