1965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes/* 2965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * Copyright (c) 1992, 1993, 1994, 1995, 1996 3965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * The Regents of the University of California. All rights reserved. 4965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * 5965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * Redistribution and use in source and binary forms, with or without 6965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * modification, are permitted provided that: (1) source code distributions 7965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * retain the above copyright notice and this paragraph in its entirety, (2) 8965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * distributions including binary code include the above copyright notice and 9965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * this paragraph in its entirety in the documentation or other materials 10965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * provided with the distribution, and (3) all advertising materials mentioning 11965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * features or use of this software display the following acknowledgement: 12965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * ``This product includes software developed by the University of California, 13965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of 14965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * the University nor the names of its contributors may be used to endorse 15965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * or promote products derived from this software without specific prior 16965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * written permission. 17965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED 18965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF 19965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 20965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes */ 21965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes 22965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes#ifndef _WIN32 23965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes#include <arpa/inet.h> 24965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes#endif 25965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes 26965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes/* 27965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * Macros to extract possibly-unaligned big-endian integral values. 28965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes */ 29965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes#ifdef LBL_ALIGN 30965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes/* 31965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * The processor doesn't natively handle unaligned loads. 32965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes */ 33965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes#if defined(__GNUC__) && defined(HAVE___ATTRIBUTE__) && \ 34965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes (defined(__alpha) || defined(__alpha__) || \ 35965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes defined(__mips) || defined(__mips__)) 36965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes 37965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes/* 38965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * This is a GCC-compatible compiler and we have __attribute__, which 39965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * we assume that mean we have __attribute__((packed)), and this is 40965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * MIPS or Alpha, which has instructions that can help when doing 41965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * unaligned loads. 42965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * 43965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * Declare packed structures containing a uint16_t and a uint32_t, 44965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * cast the pointer to point to one of those, and fetch through it; 45965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * the GCC manual doesn't appear to explicitly say that 46965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * __attribute__((packed)) causes the compiler to generate unaligned-safe 47965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * code, but it apppears to do so. 48965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * 49965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * We do this in case the compiler can generate code using those 50965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * instructions to do an unaligned load and pass stuff to "ntohs()" or 51965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * "ntohl()", which might be better than than the code to fetch the 52965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * bytes one at a time and assemble them. (That might not be the 53965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * case on a little-endian platform, such as DEC's MIPS machines and 54965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * Alpha machines, where "ntohs()" and "ntohl()" might not be done 55965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * inline.) 56965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * 57965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * We do this only for specific architectures because, for example, 58965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * at least some versions of GCC, when compiling for 64-bit SPARC, 59965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * generate code that assumes alignment if we do this. 60965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * 61965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * XXX - add other architectures and compilers as possible and 62965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * appropriate. 63965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * 64965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * HP's C compiler, indicated by __HP_cc being defined, supports 65965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * "#pragma unaligned N" in version A.05.50 and later, where "N" 66965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * specifies a number of bytes at which the typedef on the next 67965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * line is aligned, e.g. 68965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * 69965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * #pragma unalign 1 70965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * typedef uint16_t unaligned_uint16_t; 71965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * 72965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * to define unaligned_uint16_t as a 16-bit unaligned data type. 73965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * This could be presumably used, in sufficiently recent versions of 74965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * the compiler, with macros similar to those below. This would be 75965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * useful only if that compiler could generate better code for PA-RISC 76965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * or Itanium than would be generated by a bunch of shifts-and-ORs. 77965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * 78965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * DEC C, indicated by __DECC being defined, has, at least on Alpha, 79965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * an __unaligned qualifier that can be applied to pointers to get the 80965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * compiler to generate code that does unaligned loads and stores when 81965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * dereferencing the pointer in question. 82965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * 83965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * XXX - what if the native C compiler doesn't support 84965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * __attribute__((packed))? How can we get it to generate unaligned 85965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * accesses for *specific* items? 86965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes */ 87965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughestypedef struct { 88965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes uint16_t val; 89965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes} __attribute__((packed)) unaligned_uint16_t; 90965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes 91965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughestypedef struct { 92965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes uint32_t val; 93965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes} __attribute__((packed)) unaligned_uint32_t; 94965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes 95965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughesstatic inline uint16_t 96965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott HughesEXTRACT_16BITS(const void *p) 97965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes{ 98965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes return ((uint16_t)ntohs(((const unaligned_uint16_t *)(p))->val)); 99965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes} 100965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes 101965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughesstatic inline uint32_t 102965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott HughesEXTRACT_32BITS(const void *p) 103965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes{ 104965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes return ((uint32_t)ntohl(((const unaligned_uint32_t *)(p))->val)); 105965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes} 106965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes 107965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughesstatic inline uint64_t 108965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott HughesEXTRACT_64BITS(const void *p) 109965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes{ 110965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes return ((uint64_t)(((uint64_t)ntohl(((const unaligned_uint32_t *)(p) + 0)->val)) << 32 | \ 111965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes ((uint64_t)ntohl(((const unaligned_uint32_t *)(p) + 1)->val)) << 0)); 112965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes} 113965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes 114965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes#else /* have to do it a byte at a time */ 115965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes/* 116965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * This isn't a GCC-compatible compiler, we don't have __attribute__, 117965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * or we do but we don't know of any better way with this instruction 118965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * set to do unaligned loads, so do unaligned loads of big-endian 119965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * quantities the hard way - fetch the bytes one at a time and 120965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * assemble them. 121965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes */ 122965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes#define EXTRACT_16BITS(p) \ 123965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes ((uint16_t)(((uint16_t)(*((const uint8_t *)(p) + 0)) << 8) | \ 124965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes ((uint16_t)(*((const uint8_t *)(p) + 1)) << 0))) 125965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes#define EXTRACT_32BITS(p) \ 126965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes ((uint32_t)(((uint32_t)(*((const uint8_t *)(p) + 0)) << 24) | \ 127965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes ((uint32_t)(*((const uint8_t *)(p) + 1)) << 16) | \ 128965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes ((uint32_t)(*((const uint8_t *)(p) + 2)) << 8) | \ 129965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes ((uint32_t)(*((const uint8_t *)(p) + 3)) << 0))) 130965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes#define EXTRACT_64BITS(p) \ 131965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes ((uint64_t)(((uint64_t)(*((const uint8_t *)(p) + 0)) << 56) | \ 132965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes ((uint64_t)(*((const uint8_t *)(p) + 1)) << 48) | \ 133965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes ((uint64_t)(*((const uint8_t *)(p) + 2)) << 40) | \ 134965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes ((uint64_t)(*((const uint8_t *)(p) + 3)) << 32) | \ 135965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes ((uint64_t)(*((const uint8_t *)(p) + 4)) << 24) | \ 136965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes ((uint64_t)(*((const uint8_t *)(p) + 5)) << 16) | \ 137965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes ((uint64_t)(*((const uint8_t *)(p) + 6)) << 8) | \ 138965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes ((uint64_t)(*((const uint8_t *)(p) + 7)) << 0))) 139965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes#endif /* must special-case unaligned accesses */ 140965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes#else /* LBL_ALIGN */ 141965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes/* 142965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * The processor natively handles unaligned loads, so we can just 143965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * cast the pointer and fetch through it. 144965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes */ 145965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughesstatic inline uint16_t 146965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott HughesEXTRACT_16BITS(const void *p) 147965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes{ 148965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes return ((uint16_t)ntohs(*(const uint16_t *)(p))); 149965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes} 150965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes 151965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughesstatic inline uint32_t 152965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott HughesEXTRACT_32BITS(const void *p) 153965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes{ 154965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes return ((uint32_t)ntohl(*(const uint32_t *)(p))); 155965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes} 156965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes 157965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughesstatic inline uint64_t 158965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott HughesEXTRACT_64BITS(const void *p) 159965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes{ 160965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes return ((uint64_t)(((uint64_t)ntohl(*((const uint32_t *)(p) + 0))) << 32 | \ 161965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes ((uint64_t)ntohl(*((const uint32_t *)(p) + 1))) << 0)); 162965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes 163965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes} 164965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes 165965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes#endif /* LBL_ALIGN */ 166965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes 167965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes#define EXTRACT_24BITS(p) \ 168965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes ((uint32_t)(((uint32_t)(*((const uint8_t *)(p) + 0)) << 16) | \ 169965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes ((uint32_t)(*((const uint8_t *)(p) + 1)) << 8) | \ 170965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes ((uint32_t)(*((const uint8_t *)(p) + 2)) << 0))) 171965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes 172965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes#define EXTRACT_40BITS(p) \ 173965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes ((uint64_t)(((uint64_t)(*((const uint8_t *)(p) + 0)) << 32) | \ 174965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes ((uint64_t)(*((const uint8_t *)(p) + 1)) << 24) | \ 175965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes ((uint64_t)(*((const uint8_t *)(p) + 2)) << 16) | \ 176965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes ((uint64_t)(*((const uint8_t *)(p) + 3)) << 8) | \ 177965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes ((uint64_t)(*((const uint8_t *)(p) + 4)) << 0))) 178965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes 179965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes#define EXTRACT_48BITS(p) \ 180965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes ((uint64_t)(((uint64_t)(*((const uint8_t *)(p) + 0)) << 40) | \ 181965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes ((uint64_t)(*((const uint8_t *)(p) + 1)) << 32) | \ 182965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes ((uint64_t)(*((const uint8_t *)(p) + 2)) << 24) | \ 183965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes ((uint64_t)(*((const uint8_t *)(p) + 3)) << 16) | \ 184965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes ((uint64_t)(*((const uint8_t *)(p) + 4)) << 8) | \ 185965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes ((uint64_t)(*((const uint8_t *)(p) + 5)) << 0))) 186965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes 187965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes#define EXTRACT_56BITS(p) \ 188965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes ((uint64_t)(((uint64_t)(*((const uint8_t *)(p) + 0)) << 48) | \ 189965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes ((uint64_t)(*((const uint8_t *)(p) + 1)) << 40) | \ 190965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes ((uint64_t)(*((const uint8_t *)(p) + 2)) << 32) | \ 191965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes ((uint64_t)(*((const uint8_t *)(p) + 3)) << 24) | \ 192965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes ((uint64_t)(*((const uint8_t *)(p) + 4)) << 16) | \ 193965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes ((uint64_t)(*((const uint8_t *)(p) + 5)) << 8) | \ 194965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes ((uint64_t)(*((const uint8_t *)(p) + 6)) << 0))) 195965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes 196965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes/* 197965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * Macros to extract possibly-unaligned little-endian integral values. 198965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes * XXX - do loads on little-endian machines that support unaligned loads? 199965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes */ 200965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes#define EXTRACT_LE_8BITS(p) (*(p)) 201965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes#define EXTRACT_LE_16BITS(p) \ 202965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes ((uint16_t)(((uint16_t)(*((const uint8_t *)(p) + 1)) << 8) | \ 203965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes ((uint16_t)(*((const uint8_t *)(p) + 0)) << 0))) 204965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes#define EXTRACT_LE_32BITS(p) \ 205965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes ((uint32_t)(((uint32_t)(*((const uint8_t *)(p) + 3)) << 24) | \ 206965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes ((uint32_t)(*((const uint8_t *)(p) + 2)) << 16) | \ 207965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes ((uint32_t)(*((const uint8_t *)(p) + 1)) << 8) | \ 208965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes ((uint32_t)(*((const uint8_t *)(p) + 0)) << 0))) 209965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes#define EXTRACT_LE_24BITS(p) \ 210965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes ((uint32_t)(((uint32_t)(*((const uint8_t *)(p) + 2)) << 16) | \ 211965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes ((uint32_t)(*((const uint8_t *)(p) + 1)) << 8) | \ 212965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes ((uint32_t)(*((const uint8_t *)(p) + 0)) << 0))) 213965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes#define EXTRACT_LE_64BITS(p) \ 214965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes ((uint64_t)(((uint64_t)(*((const uint8_t *)(p) + 7)) << 56) | \ 215965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes ((uint64_t)(*((const uint8_t *)(p) + 6)) << 48) | \ 216965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes ((uint64_t)(*((const uint8_t *)(p) + 5)) << 40) | \ 217965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes ((uint64_t)(*((const uint8_t *)(p) + 4)) << 32) | \ 218965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes ((uint64_t)(*((const uint8_t *)(p) + 3)) << 24) | \ 219965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes ((uint64_t)(*((const uint8_t *)(p) + 2)) << 16) | \ 220965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes ((uint64_t)(*((const uint8_t *)(p) + 1)) << 8) | \ 221965a4b5291eead2d8f826d2c87e58a12bb56a214Elliott Hughes ((uint64_t)(*((const uint8_t *)(p) + 0)) << 0))) 222