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196 lines
5.4 KiB
196 lines
5.4 KiB
/*-
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* Copyright (c) 2002 Thomas Moestl <tmm@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD: head/lib/libarchive/archive_endian.h 201085 2009-12-28 02:17:15Z kientzle $
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*
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* Borrowed from FreeBSD's <sys/endian.h>
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*/
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#ifndef ARCHIVE_ENDIAN_H_INCLUDED
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#define ARCHIVE_ENDIAN_H_INCLUDED
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/* Note: This is a purely internal header! */
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/* Do not use this outside of libarchive internal code! */
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#ifndef __LIBARCHIVE_BUILD
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#error This header is only to be used internally to libarchive.
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#endif
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/*
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* Disabling inline keyword for compilers known to choke on it:
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* - Watcom C++ in C code. (For any version?)
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* - SGI MIPSpro
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* - Microsoft Visual C++ 6.0 (supposedly newer versions too)
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* - IBM VisualAge 6 (XL v6)
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* - Sun WorkShop C (SunPro) before 5.9
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*/
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#if defined(__WATCOMC__) || defined(__sgi) || defined(__hpux) || defined(__BORLANDC__)
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#define inline
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#elif defined(__IBMC__) && __IBMC__ < 700
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#define inline
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#elif defined(__SUNPRO_C) && __SUNPRO_C < 0x590
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#define inline
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#elif defined(_MSC_VER) || defined(__osf__)
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#define inline __inline
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#endif
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/* Alignment-agnostic encode/decode bytestream to/from little/big endian. */
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static inline uint16_t
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archive_be16dec(const void *pp)
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{
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unsigned char const *p = (unsigned char const *)pp;
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/* Store into unsigned temporaries before left shifting, to avoid
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promotion to signed int and then left shifting into the sign bit,
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which is undefined behaviour. */
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unsigned int p1 = p[1];
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unsigned int p0 = p[0];
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return ((p0 << 8) | p1);
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}
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static inline uint32_t
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archive_be32dec(const void *pp)
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{
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unsigned char const *p = (unsigned char const *)pp;
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/* Store into unsigned temporaries before left shifting, to avoid
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promotion to signed int and then left shifting into the sign bit,
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which is undefined behaviour. */
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unsigned int p3 = p[3];
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unsigned int p2 = p[2];
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unsigned int p1 = p[1];
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unsigned int p0 = p[0];
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return ((p0 << 24) | (p1 << 16) | (p2 << 8) | p3);
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}
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static inline uint64_t
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archive_be64dec(const void *pp)
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{
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unsigned char const *p = (unsigned char const *)pp;
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return (((uint64_t)archive_be32dec(p) << 32) | archive_be32dec(p + 4));
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}
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static inline uint16_t
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archive_le16dec(const void *pp)
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{
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unsigned char const *p = (unsigned char const *)pp;
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/* Store into unsigned temporaries before left shifting, to avoid
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promotion to signed int and then left shifting into the sign bit,
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which is undefined behaviour. */
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unsigned int p1 = p[1];
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unsigned int p0 = p[0];
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return ((p1 << 8) | p0);
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}
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static inline uint32_t
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archive_le32dec(const void *pp)
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{
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unsigned char const *p = (unsigned char const *)pp;
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/* Store into unsigned temporaries before left shifting, to avoid
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promotion to signed int and then left shifting into the sign bit,
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which is undefined behaviour. */
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unsigned int p3 = p[3];
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unsigned int p2 = p[2];
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unsigned int p1 = p[1];
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unsigned int p0 = p[0];
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return ((p3 << 24) | (p2 << 16) | (p1 << 8) | p0);
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}
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static inline uint64_t
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archive_le64dec(const void *pp)
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{
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unsigned char const *p = (unsigned char const *)pp;
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return (((uint64_t)archive_le32dec(p + 4) << 32) | archive_le32dec(p));
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}
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static inline void
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archive_be16enc(void *pp, uint16_t u)
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{
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unsigned char *p = (unsigned char *)pp;
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p[0] = (u >> 8) & 0xff;
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p[1] = u & 0xff;
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}
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static inline void
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archive_be32enc(void *pp, uint32_t u)
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{
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unsigned char *p = (unsigned char *)pp;
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p[0] = (u >> 24) & 0xff;
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p[1] = (u >> 16) & 0xff;
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p[2] = (u >> 8) & 0xff;
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p[3] = u & 0xff;
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}
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static inline void
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archive_be64enc(void *pp, uint64_t u)
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{
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unsigned char *p = (unsigned char *)pp;
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archive_be32enc(p, (uint32_t)(u >> 32));
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archive_be32enc(p + 4, (uint32_t)(u & 0xffffffff));
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}
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static inline void
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archive_le16enc(void *pp, uint16_t u)
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{
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unsigned char *p = (unsigned char *)pp;
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p[0] = u & 0xff;
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p[1] = (u >> 8) & 0xff;
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}
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static inline void
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archive_le32enc(void *pp, uint32_t u)
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{
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unsigned char *p = (unsigned char *)pp;
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p[0] = u & 0xff;
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p[1] = (u >> 8) & 0xff;
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p[2] = (u >> 16) & 0xff;
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p[3] = (u >> 24) & 0xff;
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}
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static inline void
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archive_le64enc(void *pp, uint64_t u)
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{
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unsigned char *p = (unsigned char *)pp;
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archive_le32enc(p, (uint32_t)(u & 0xffffffff));
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archive_le32enc(p + 4, (uint32_t)(u >> 32));
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}
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#endif
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