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 * 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 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 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 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 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 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 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 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 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 125 archive_be64enc(void *pp, uint64_t u) 126 { 127 unsigned char *p = (unsigned char *)pp; 128 129 archive_be32enc(p, (uint32_t)(u >> 32)); 130 archive_be32enc(p + 4, (uint32_t)(u & 0xffffffff)); 131 } 132 133 static inline void 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 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 154 archive_le64enc(void *pp, uint64_t u) 155 { 156 unsigned char *p = (unsigned char *)pp; 157 158 archive_le32enc(p, (uint32_t)(u & 0xffffffff)); 159 archive_le32enc(p + 4, (uint32_t)(u >> 32)); 160 } 161 162 #endif 163