1caf54c4fSMartin Matuska /*- 2caf54c4fSMartin Matuska * Copyright (c) 2002 Thomas Moestl <tmm@FreeBSD.org> 3caf54c4fSMartin Matuska * All rights reserved. 4caf54c4fSMartin Matuska * 5caf54c4fSMartin Matuska * Redistribution and use in source and binary forms, with or without 6caf54c4fSMartin Matuska * modification, are permitted provided that the following conditions 7caf54c4fSMartin Matuska * are met: 8caf54c4fSMartin Matuska * 1. Redistributions of source code must retain the above copyright 9caf54c4fSMartin Matuska * notice, this list of conditions and the following disclaimer. 10caf54c4fSMartin Matuska * 2. Redistributions in binary form must reproduce the above copyright 11caf54c4fSMartin Matuska * notice, this list of conditions and the following disclaimer in the 12caf54c4fSMartin Matuska * documentation and/or other materials provided with the distribution. 13caf54c4fSMartin Matuska * 14caf54c4fSMartin Matuska * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15caf54c4fSMartin Matuska * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16caf54c4fSMartin Matuska * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17caf54c4fSMartin Matuska * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18caf54c4fSMartin Matuska * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19caf54c4fSMartin Matuska * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20caf54c4fSMartin Matuska * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21caf54c4fSMartin Matuska * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22caf54c4fSMartin Matuska * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23caf54c4fSMartin Matuska * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24caf54c4fSMartin Matuska * SUCH DAMAGE. 25caf54c4fSMartin Matuska * 266c22d9efSMartin Matuska * $FreeBSD$ 27caf54c4fSMartin Matuska * 28caf54c4fSMartin Matuska * Borrowed from FreeBSD's <sys/endian.h> 29caf54c4fSMartin Matuska */ 30caf54c4fSMartin Matuska 31caf54c4fSMartin Matuska #ifndef __LIBARCHIVE_BUILD 32caf54c4fSMartin Matuska #error This header is only to be used internally to libarchive. 33caf54c4fSMartin Matuska #endif 34caf54c4fSMartin Matuska 35caf54c4fSMartin Matuska /* Note: This is a purely internal header! */ 36caf54c4fSMartin Matuska /* Do not use this outside of libarchive internal code! */ 37caf54c4fSMartin Matuska 38caf54c4fSMartin Matuska #ifndef ARCHIVE_ENDIAN_H_INCLUDED 39caf54c4fSMartin Matuska #define ARCHIVE_ENDIAN_H_INCLUDED 40caf54c4fSMartin Matuska 41caf54c4fSMartin Matuska 42caf54c4fSMartin Matuska /* 43caf54c4fSMartin Matuska * Disabling inline keyword for compilers known to choke on it: 44caf54c4fSMartin Matuska * - Watcom C++ in C code. (For any version?) 45caf54c4fSMartin Matuska * - SGI MIPSpro 46caf54c4fSMartin Matuska * - Microsoft Visual C++ 6.0 (supposedly newer versions too) 47cdf63a70SMartin Matuska * - IBM VisualAge 6 (XL v6) 48cdf63a70SMartin Matuska * - Sun WorkShop C (SunPro) before 5.9 49caf54c4fSMartin Matuska */ 50caf54c4fSMartin Matuska #if defined(__WATCOMC__) || defined(__sgi) || defined(__hpux) || defined(__BORLANDC__) 51caf54c4fSMartin Matuska #define inline 52cdf63a70SMartin Matuska #elif defined(__IBMC__) && __IBMC__ < 700 53cdf63a70SMartin Matuska #define inline 54cdf63a70SMartin Matuska #elif defined(__SUNPRO_C) && __SUNPRO_C < 0x590 55cdf63a70SMartin Matuska #define inline 56cdf63a70SMartin Matuska #elif defined(_MSC_VER) || defined(__osf__) 57caf54c4fSMartin Matuska #define inline __inline 58caf54c4fSMartin Matuska #endif 59caf54c4fSMartin Matuska 60caf54c4fSMartin Matuska /* Alignment-agnostic encode/decode bytestream to/from little/big endian. */ 61caf54c4fSMartin Matuska 62caf54c4fSMartin Matuska static inline uint16_t 63caf54c4fSMartin Matuska archive_be16dec(const void *pp) 64caf54c4fSMartin Matuska { 65caf54c4fSMartin Matuska unsigned char const *p = (unsigned char const *)pp; 66caf54c4fSMartin Matuska 67cdf63a70SMartin Matuska /* Store into unsigned temporaries before left shifting, to avoid 68cdf63a70SMartin Matuska promotion to signed int and then left shifting into the sign bit, 69cdf63a70SMartin Matuska which is undefined behaviour. */ 70cdf63a70SMartin Matuska unsigned int p1 = p[1]; 71cdf63a70SMartin Matuska unsigned int p0 = p[0]; 72cdf63a70SMartin Matuska 73cdf63a70SMartin Matuska return ((p0 << 8) | p1); 74caf54c4fSMartin Matuska } 75caf54c4fSMartin Matuska 76caf54c4fSMartin Matuska static inline uint32_t 77caf54c4fSMartin Matuska archive_be32dec(const void *pp) 78caf54c4fSMartin Matuska { 79caf54c4fSMartin Matuska unsigned char const *p = (unsigned char const *)pp; 80caf54c4fSMartin Matuska 81cdf63a70SMartin Matuska /* Store into unsigned temporaries before left shifting, to avoid 82cdf63a70SMartin Matuska promotion to signed int and then left shifting into the sign bit, 83cdf63a70SMartin Matuska which is undefined behaviour. */ 84cdf63a70SMartin Matuska unsigned int p3 = p[3]; 85cdf63a70SMartin Matuska unsigned int p2 = p[2]; 86cdf63a70SMartin Matuska unsigned int p1 = p[1]; 87cdf63a70SMartin Matuska unsigned int p0 = p[0]; 88cdf63a70SMartin Matuska 89cdf63a70SMartin Matuska return ((p0 << 24) | (p1 << 16) | (p2 << 8) | p3); 90caf54c4fSMartin Matuska } 91caf54c4fSMartin Matuska 92caf54c4fSMartin Matuska static inline uint64_t 93caf54c4fSMartin Matuska archive_be64dec(const void *pp) 94caf54c4fSMartin Matuska { 95caf54c4fSMartin Matuska unsigned char const *p = (unsigned char const *)pp; 96caf54c4fSMartin Matuska 97caf54c4fSMartin Matuska return (((uint64_t)archive_be32dec(p) << 32) | archive_be32dec(p + 4)); 98caf54c4fSMartin Matuska } 99caf54c4fSMartin Matuska 100caf54c4fSMartin Matuska static inline uint16_t 101caf54c4fSMartin Matuska archive_le16dec(const void *pp) 102caf54c4fSMartin Matuska { 103caf54c4fSMartin Matuska unsigned char const *p = (unsigned char const *)pp; 104caf54c4fSMartin Matuska 105cdf63a70SMartin Matuska /* Store into unsigned temporaries before left shifting, to avoid 106cdf63a70SMartin Matuska promotion to signed int and then left shifting into the sign bit, 107cdf63a70SMartin Matuska which is undefined behaviour. */ 108cdf63a70SMartin Matuska unsigned int p1 = p[1]; 109cdf63a70SMartin Matuska unsigned int p0 = p[0]; 110cdf63a70SMartin Matuska 111cdf63a70SMartin Matuska return ((p1 << 8) | p0); 112caf54c4fSMartin Matuska } 113caf54c4fSMartin Matuska 114caf54c4fSMartin Matuska static inline uint32_t 115caf54c4fSMartin Matuska archive_le32dec(const void *pp) 116caf54c4fSMartin Matuska { 117caf54c4fSMartin Matuska unsigned char const *p = (unsigned char const *)pp; 118caf54c4fSMartin Matuska 119cdf63a70SMartin Matuska /* Store into unsigned temporaries before left shifting, to avoid 120cdf63a70SMartin Matuska promotion to signed int and then left shifting into the sign bit, 121cdf63a70SMartin Matuska which is undefined behaviour. */ 122cdf63a70SMartin Matuska unsigned int p3 = p[3]; 123cdf63a70SMartin Matuska unsigned int p2 = p[2]; 124cdf63a70SMartin Matuska unsigned int p1 = p[1]; 125cdf63a70SMartin Matuska unsigned int p0 = p[0]; 126cdf63a70SMartin Matuska 127cdf63a70SMartin Matuska return ((p3 << 24) | (p2 << 16) | (p1 << 8) | p0); 128caf54c4fSMartin Matuska } 129caf54c4fSMartin Matuska 130caf54c4fSMartin Matuska static inline uint64_t 131caf54c4fSMartin Matuska archive_le64dec(const void *pp) 132caf54c4fSMartin Matuska { 133caf54c4fSMartin Matuska unsigned char const *p = (unsigned char const *)pp; 134caf54c4fSMartin Matuska 135caf54c4fSMartin Matuska return (((uint64_t)archive_le32dec(p + 4) << 32) | archive_le32dec(p)); 136caf54c4fSMartin Matuska } 137caf54c4fSMartin Matuska 138caf54c4fSMartin Matuska static inline void 139caf54c4fSMartin Matuska archive_be16enc(void *pp, uint16_t u) 140caf54c4fSMartin Matuska { 141caf54c4fSMartin Matuska unsigned char *p = (unsigned char *)pp; 142caf54c4fSMartin Matuska 143caf54c4fSMartin Matuska p[0] = (u >> 8) & 0xff; 144caf54c4fSMartin Matuska p[1] = u & 0xff; 145caf54c4fSMartin Matuska } 146caf54c4fSMartin Matuska 147caf54c4fSMartin Matuska static inline void 148caf54c4fSMartin Matuska archive_be32enc(void *pp, uint32_t u) 149caf54c4fSMartin Matuska { 150caf54c4fSMartin Matuska unsigned char *p = (unsigned char *)pp; 151caf54c4fSMartin Matuska 152caf54c4fSMartin Matuska p[0] = (u >> 24) & 0xff; 153caf54c4fSMartin Matuska p[1] = (u >> 16) & 0xff; 154caf54c4fSMartin Matuska p[2] = (u >> 8) & 0xff; 155caf54c4fSMartin Matuska p[3] = u & 0xff; 156caf54c4fSMartin Matuska } 157caf54c4fSMartin Matuska 158caf54c4fSMartin Matuska static inline void 159caf54c4fSMartin Matuska archive_be64enc(void *pp, uint64_t u) 160caf54c4fSMartin Matuska { 161caf54c4fSMartin Matuska unsigned char *p = (unsigned char *)pp; 162caf54c4fSMartin Matuska 163fd082e96SMartin Matuska archive_be32enc(p, (uint32_t)(u >> 32)); 164fd082e96SMartin Matuska archive_be32enc(p + 4, (uint32_t)(u & 0xffffffff)); 165caf54c4fSMartin Matuska } 166caf54c4fSMartin Matuska 167caf54c4fSMartin Matuska static inline void 168caf54c4fSMartin Matuska archive_le16enc(void *pp, uint16_t u) 169caf54c4fSMartin Matuska { 170caf54c4fSMartin Matuska unsigned char *p = (unsigned char *)pp; 171caf54c4fSMartin Matuska 172caf54c4fSMartin Matuska p[0] = u & 0xff; 173caf54c4fSMartin Matuska p[1] = (u >> 8) & 0xff; 174caf54c4fSMartin Matuska } 175caf54c4fSMartin Matuska 176caf54c4fSMartin Matuska static inline void 177caf54c4fSMartin Matuska archive_le32enc(void *pp, uint32_t u) 178caf54c4fSMartin Matuska { 179caf54c4fSMartin Matuska unsigned char *p = (unsigned char *)pp; 180caf54c4fSMartin Matuska 181caf54c4fSMartin Matuska p[0] = u & 0xff; 182caf54c4fSMartin Matuska p[1] = (u >> 8) & 0xff; 183caf54c4fSMartin Matuska p[2] = (u >> 16) & 0xff; 184caf54c4fSMartin Matuska p[3] = (u >> 24) & 0xff; 185caf54c4fSMartin Matuska } 186caf54c4fSMartin Matuska 187caf54c4fSMartin Matuska static inline void 188caf54c4fSMartin Matuska archive_le64enc(void *pp, uint64_t u) 189caf54c4fSMartin Matuska { 190caf54c4fSMartin Matuska unsigned char *p = (unsigned char *)pp; 191caf54c4fSMartin Matuska 192fd082e96SMartin Matuska archive_le32enc(p, (uint32_t)(u & 0xffffffff)); 193fd082e96SMartin Matuska archive_le32enc(p + 4, (uint32_t)(u >> 32)); 194caf54c4fSMartin Matuska } 195caf54c4fSMartin Matuska 196caf54c4fSMartin Matuska #endif 197