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 1.3 2008/05/26 17:00:22 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 /* Watcom C++ doesn't support 'inline' in C code. (For any version?) */ 39 #if defined( __WATCOMC__ ) 40 #define inline 41 #endif 42 43 /* Visual C++ 6.0 doesn't support 'inline' in C code. (Does VC7? VC8?) */ 44 #if defined(_MSC_VER) 45 #define inline 46 #endif 47 48 /* Alignment-agnostic encode/decode bytestream to/from little/big endian. */ 49 50 static inline uint16_t 51 archive_be16dec(const void *pp) 52 { 53 unsigned char const *p = (unsigned char const *)pp; 54 55 return ((p[0] << 8) | p[1]); 56 } 57 58 static inline uint32_t 59 archive_be32dec(const void *pp) 60 { 61 unsigned char const *p = (unsigned char const *)pp; 62 63 return ((p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3]); 64 } 65 66 static inline uint64_t 67 archive_be64dec(const void *pp) 68 { 69 unsigned char const *p = (unsigned char const *)pp; 70 71 return (((uint64_t)archive_be32dec(p) << 32) | archive_be32dec(p + 4)); 72 } 73 74 static inline uint16_t 75 archive_le16dec(const void *pp) 76 { 77 unsigned char const *p = (unsigned char const *)pp; 78 79 return ((p[1] << 8) | p[0]); 80 } 81 82 static inline uint32_t 83 archive_le32dec(const void *pp) 84 { 85 unsigned char const *p = (unsigned char const *)pp; 86 87 return ((p[3] << 24) | (p[2] << 16) | (p[1] << 8) | p[0]); 88 } 89 90 static inline uint64_t 91 archive_le64dec(const void *pp) 92 { 93 unsigned char const *p = (unsigned char const *)pp; 94 95 return (((uint64_t)archive_le32dec(p + 4) << 32) | archive_le32dec(p)); 96 } 97 98 static inline void 99 archive_be16enc(void *pp, uint16_t u) 100 { 101 unsigned char *p = (unsigned char *)pp; 102 103 p[0] = (u >> 8) & 0xff; 104 p[1] = u & 0xff; 105 } 106 107 static inline void 108 archive_be32enc(void *pp, uint32_t u) 109 { 110 unsigned char *p = (unsigned char *)pp; 111 112 p[0] = (u >> 24) & 0xff; 113 p[1] = (u >> 16) & 0xff; 114 p[2] = (u >> 8) & 0xff; 115 p[3] = u & 0xff; 116 } 117 118 static inline void 119 archive_be64enc(void *pp, uint64_t u) 120 { 121 unsigned char *p = (unsigned char *)pp; 122 123 archive_be32enc(p, u >> 32); 124 archive_be32enc(p + 4, u & 0xffffffff); 125 } 126 127 static inline void 128 archive_le16enc(void *pp, uint16_t u) 129 { 130 unsigned char *p = (unsigned char *)pp; 131 132 p[0] = u & 0xff; 133 p[1] = (u >> 8) & 0xff; 134 } 135 136 static inline void 137 archive_le32enc(void *pp, uint32_t u) 138 { 139 unsigned char *p = (unsigned char *)pp; 140 141 p[0] = u & 0xff; 142 p[1] = (u >> 8) & 0xff; 143 p[2] = (u >> 16) & 0xff; 144 p[3] = (u >> 24) & 0xff; 145 } 146 147 static inline void 148 archive_le64enc(void *pp, uint64_t u) 149 { 150 unsigned char *p = (unsigned char *)pp; 151 152 archive_le32enc(p, u & 0xffffffff); 153 archive_le32enc(p + 4, u >> 32); 154 } 155 156 #endif 157