| /* |
| * endians.h - Definitions related to handling of byte ordering. |
| * Originated from the Linux-NTFS project. |
| * |
| * Copyright (c) 2000-2005 Anton Altaparmakov |
| * |
| * This program/include file is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License as published |
| * by the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program/include file is distributed in the hope that it will be |
| * useful, but WITHOUT ANY WARRANTY; without even the implied warranty |
| * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program (in the main directory of the NTFS-3G |
| * distribution in the file COPYING); if not, write to the Free Software |
| * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| */ |
| |
| #ifndef _NTFS_ENDIANS_H |
| #define _NTFS_ENDIANS_H |
| |
| #ifdef HAVE_CONFIG_H |
| #include "config.h" |
| #endif |
| |
| /* |
| * Notes: |
| * We define the conversion functions including typecasts since the |
| * defaults don't necessarily perform appropriate typecasts. |
| * Also, using our own functions means that we can change them if it |
| * turns out that we do need to use the unaligned access macros on |
| * architectures requiring aligned memory accesses... |
| */ |
| |
| #ifdef HAVE_ENDIAN_H |
| #include <endian.h> |
| #endif |
| #ifdef HAVE_SYS_ENDIAN_H |
| #include <sys/endian.h> |
| #endif |
| #ifdef HAVE_MACHINE_ENDIAN_H |
| #include <machine/endian.h> |
| #endif |
| #ifdef HAVE_SYS_BYTEORDER_H |
| #include <sys/byteorder.h> |
| #endif |
| #ifdef HAVE_SYS_PARAM_H |
| #include <sys/param.h> |
| #endif |
| |
| #ifndef __BYTE_ORDER |
| # if defined(_BYTE_ORDER) |
| # define __BYTE_ORDER _BYTE_ORDER |
| # define __LITTLE_ENDIAN _LITTLE_ENDIAN |
| # define __BIG_ENDIAN _BIG_ENDIAN |
| # elif defined(BYTE_ORDER) |
| # define __BYTE_ORDER BYTE_ORDER |
| # define __LITTLE_ENDIAN LITTLE_ENDIAN |
| # define __BIG_ENDIAN BIG_ENDIAN |
| # elif defined(__BYTE_ORDER__) && defined(__LITTLE_ENDIAN__) && \ |
| defined(__BIG_ENDIAN__) |
| # define __BYTE_ORDER __BYTE_ORDER__ |
| # define __LITTLE_ENDIAN __LITTLE_ENDIAN__ |
| # define __BIG_ENDIAN __BIG_ENDIAN__ |
| # elif defined(__BYTE_ORDER__) && defined(__ORDER_LITTLE_ENDIAN__) && \ |
| defined(__ORDER_BIG_ENDIAN__) |
| # define __BYTE_ORDER __BYTE_ORDER__ |
| # define __LITTLE_ENDIAN __ORDER_LITTLE_ENDIAN__ |
| # define __BIG_ENDIAN __ORDER_BIG_ENDIAN__ |
| # elif (defined(_LITTLE_ENDIAN) && !defined(_BIG_ENDIAN)) || \ |
| defined(WORDS_LITTLEENDIAN) |
| # define __BYTE_ORDER 1 |
| # define __LITTLE_ENDIAN 1 |
| # define __BIG_ENDIAN 0 |
| # elif (!defined(_LITTLE_ENDIAN) && defined(_BIG_ENDIAN)) || \ |
| defined(WORDS_BIGENDIAN) |
| # define __BYTE_ORDER 0 |
| # define __LITTLE_ENDIAN 1 |
| # define __BIG_ENDIAN 0 |
| # else |
| # error "__BYTE_ORDER is not defined." |
| # endif |
| #endif |
| |
| #define __ntfs_bswap_constant_16(x) \ |
| (u16)((((u16)(x) & 0xff00) >> 8) | \ |
| (((u16)(x) & 0x00ff) << 8)) |
| |
| #define __ntfs_bswap_constant_32(x) \ |
| (u32)((((u32)(x) & 0xff000000u) >> 24) | \ |
| (((u32)(x) & 0x00ff0000u) >> 8) | \ |
| (((u32)(x) & 0x0000ff00u) << 8) | \ |
| (((u32)(x) & 0x000000ffu) << 24)) |
| |
| #define __ntfs_bswap_constant_64(x) \ |
| (u64)((((u64)(x) & 0xff00000000000000ull) >> 56) | \ |
| (((u64)(x) & 0x00ff000000000000ull) >> 40) | \ |
| (((u64)(x) & 0x0000ff0000000000ull) >> 24) | \ |
| (((u64)(x) & 0x000000ff00000000ull) >> 8) | \ |
| (((u64)(x) & 0x00000000ff000000ull) << 8) | \ |
| (((u64)(x) & 0x0000000000ff0000ull) << 24) | \ |
| (((u64)(x) & 0x000000000000ff00ull) << 40) | \ |
| (((u64)(x) & 0x00000000000000ffull) << 56)) |
| |
| #ifdef HAVE_BYTESWAP_H |
| # include <byteswap.h> |
| #else |
| # define bswap_16(x) __ntfs_bswap_constant_16(x) |
| # define bswap_32(x) __ntfs_bswap_constant_32(x) |
| # define bswap_64(x) __ntfs_bswap_constant_64(x) |
| #endif |
| |
| #if defined(__LITTLE_ENDIAN) && (__BYTE_ORDER == __LITTLE_ENDIAN) |
| |
| #define __le16_to_cpu(x) (x) |
| #define __le32_to_cpu(x) (x) |
| #define __le64_to_cpu(x) (x) |
| |
| #define __cpu_to_le16(x) (x) |
| #define __cpu_to_le32(x) (x) |
| #define __cpu_to_le64(x) (x) |
| |
| #define __constant_le16_to_cpu(x) (x) |
| #define __constant_le32_to_cpu(x) (x) |
| #define __constant_le64_to_cpu(x) (x) |
| |
| #define __constant_cpu_to_le16(x) (x) |
| #define __constant_cpu_to_le32(x) (x) |
| #define __constant_cpu_to_le64(x) (x) |
| |
| #define __be16_to_cpu(x) bswap_16(x) |
| #define __be32_to_cpu(x) bswap_32(x) |
| #define __be64_to_cpu(x) bswap_64(x) |
| |
| #define __cpu_to_be16(x) bswap_16(x) |
| #define __cpu_to_be32(x) bswap_32(x) |
| #define __cpu_to_be64(x) bswap_64(x) |
| |
| #define __constant_be16_to_cpu(x) __ntfs_bswap_constant_16((u16)(x)) |
| #define __constant_be32_to_cpu(x) __ntfs_bswap_constant_32((u32)(x)) |
| #define __constant_be64_to_cpu(x) __ntfs_bswap_constant_64((u64)(x)) |
| |
| #define __constant_cpu_to_be16(x) __ntfs_bswap_constant_16((u16)(x)) |
| #define __constant_cpu_to_be32(x) __ntfs_bswap_constant_32((u32)(x)) |
| #define __constant_cpu_to_be64(x) __ntfs_bswap_constant_64((u64)(x)) |
| |
| #elif defined(__BIG_ENDIAN) && (__BYTE_ORDER == __BIG_ENDIAN) |
| |
| #define __le16_to_cpu(x) bswap_16(x) |
| #define __le32_to_cpu(x) bswap_32(x) |
| #define __le64_to_cpu(x) bswap_64(x) |
| |
| #define __cpu_to_le16(x) bswap_16(x) |
| #define __cpu_to_le32(x) bswap_32(x) |
| #define __cpu_to_le64(x) bswap_64(x) |
| |
| #define __constant_le16_to_cpu(x) __ntfs_bswap_constant_16((u16)(x)) |
| #define __constant_le32_to_cpu(x) __ntfs_bswap_constant_32((u32)(x)) |
| #define __constant_le64_to_cpu(x) __ntfs_bswap_constant_64((u64)(x)) |
| |
| #define __constant_cpu_to_le16(x) __ntfs_bswap_constant_16((u16)(x)) |
| #define __constant_cpu_to_le32(x) __ntfs_bswap_constant_32((u32)(x)) |
| #define __constant_cpu_to_le64(x) __ntfs_bswap_constant_64((u64)(x)) |
| |
| #define __be16_to_cpu(x) (x) |
| #define __be32_to_cpu(x) (x) |
| #define __be64_to_cpu(x) (x) |
| |
| #define __cpu_to_be16(x) (x) |
| #define __cpu_to_be32(x) (x) |
| #define __cpu_to_be64(x) (x) |
| |
| #define __constant_be16_to_cpu(x) (x) |
| #define __constant_be32_to_cpu(x) (x) |
| #define __constant_be64_to_cpu(x) (x) |
| |
| #define __constant_cpu_to_be16(x) (x) |
| #define __constant_cpu_to_be32(x) (x) |
| #define __constant_cpu_to_be64(x) (x) |
| |
| #else |
| |
| #error "You must define __BYTE_ORDER to be __LITTLE_ENDIAN or __BIG_ENDIAN." |
| |
| #endif |
| |
| /* Unsigned from LE to CPU conversion. */ |
| |
| #define le16_to_cpu(x) (u16)__le16_to_cpu((u16)(x)) |
| #define le32_to_cpu(x) (u32)__le32_to_cpu((u32)(x)) |
| #define le64_to_cpu(x) (u64)__le64_to_cpu((u64)(x)) |
| |
| #define le16_to_cpup(x) (u16)__le16_to_cpu(*(const u16*)(x)) |
| #define le32_to_cpup(x) (u32)__le32_to_cpu(*(const u32*)(x)) |
| #define le64_to_cpup(x) (u64)__le64_to_cpu(*(const u64*)(x)) |
| |
| /* Signed from LE to CPU conversion. */ |
| |
| #define sle16_to_cpu(x) (s16)__le16_to_cpu((s16)(x)) |
| #define sle32_to_cpu(x) (s32)__le32_to_cpu((s32)(x)) |
| #define sle64_to_cpu(x) (s64)__le64_to_cpu((s64)(x)) |
| |
| #define sle16_to_cpup(x) (s16)__le16_to_cpu(*(s16*)(x)) |
| #define sle32_to_cpup(x) (s32)__le32_to_cpu(*(s32*)(x)) |
| #define sle64_to_cpup(x) (s64)__le64_to_cpu(*(s64*)(x)) |
| |
| /* Unsigned from CPU to LE conversion. */ |
| |
| #define cpu_to_le16(x) (u16)__cpu_to_le16((u16)(x)) |
| #define cpu_to_le32(x) (u32)__cpu_to_le32((u32)(x)) |
| #define cpu_to_le64(x) (u64)__cpu_to_le64((u64)(x)) |
| |
| #define cpu_to_le16p(x) (u16)__cpu_to_le16(*(u16*)(x)) |
| #define cpu_to_le32p(x) (u32)__cpu_to_le32(*(u32*)(x)) |
| #define cpu_to_le64p(x) (u64)__cpu_to_le64(*(u64*)(x)) |
| |
| /* Signed from CPU to LE conversion. */ |
| |
| #define cpu_to_sle16(x) (s16)__cpu_to_le16((s16)(x)) |
| #define cpu_to_sle32(x) (s32)__cpu_to_le32((s32)(x)) |
| #define cpu_to_sle64(x) (s64)__cpu_to_le64((s64)(x)) |
| |
| #define cpu_to_sle16p(x) (s16)__cpu_to_le16(*(s16*)(x)) |
| #define cpu_to_sle32p(x) (s32)__cpu_to_le32(*(s32*)(x)) |
| #define cpu_to_sle64p(x) (s64)__cpu_to_le64(*(s64*)(x)) |
| |
| /* Unsigned from BE to CPU conversion. */ |
| |
| #define be16_to_cpu(x) (u16)__be16_to_cpu((u16)(x)) |
| #define be32_to_cpu(x) (u32)__be32_to_cpu((u32)(x)) |
| #define be64_to_cpu(x) (u64)__be64_to_cpu((u64)(x)) |
| |
| #define be16_to_cpup(x) (u16)__be16_to_cpu(*(const u16*)(x)) |
| #define be32_to_cpup(x) (u32)__be32_to_cpu(*(const u32*)(x)) |
| #define be64_to_cpup(x) (u64)__be64_to_cpu(*(const u64*)(x)) |
| |
| /* Signed from BE to CPU conversion. */ |
| |
| #define sbe16_to_cpu(x) (s16)__be16_to_cpu((s16)(x)) |
| #define sbe32_to_cpu(x) (s32)__be32_to_cpu((s32)(x)) |
| #define sbe64_to_cpu(x) (s64)__be64_to_cpu((s64)(x)) |
| |
| #define sbe16_to_cpup(x) (s16)__be16_to_cpu(*(s16*)(x)) |
| #define sbe32_to_cpup(x) (s32)__be32_to_cpu(*(s32*)(x)) |
| #define sbe64_to_cpup(x) (s64)__be64_to_cpu(*(s64*)(x)) |
| |
| /* Unsigned from CPU to BE conversion. */ |
| |
| #define cpu_to_be16(x) (u16)__cpu_to_be16((u16)(x)) |
| #define cpu_to_be32(x) (u32)__cpu_to_be32((u32)(x)) |
| #define cpu_to_be64(x) (u64)__cpu_to_be64((u64)(x)) |
| |
| #define cpu_to_be16p(x) (u16)__cpu_to_be16(*(u16*)(x)) |
| #define cpu_to_be32p(x) (u32)__cpu_to_be32(*(u32*)(x)) |
| #define cpu_to_be64p(x) (u64)__cpu_to_be64(*(u64*)(x)) |
| |
| /* Signed from CPU to BE conversion. */ |
| |
| #define cpu_to_sbe16(x) (s16)__cpu_to_be16((s16)(x)) |
| #define cpu_to_sbe32(x) (s32)__cpu_to_be32((s32)(x)) |
| #define cpu_to_sbe64(x) (s64)__cpu_to_be64((s64)(x)) |
| |
| #define cpu_to_sbe16p(x) (s16)__cpu_to_be16(*(s16*)(x)) |
| #define cpu_to_sbe32p(x) (s32)__cpu_to_be32(*(s32*)(x)) |
| #define cpu_to_sbe64p(x) (s64)__cpu_to_be64(*(s64*)(x)) |
| |
| /* Constant endianness conversion defines. */ |
| |
| #define const_le16_to_cpu(x) ((u16) __constant_le16_to_cpu(x)) |
| #define const_le32_to_cpu(x) ((u32) __constant_le32_to_cpu(x)) |
| #define const_le64_to_cpu(x) ((u64) __constant_le64_to_cpu(x)) |
| |
| #define const_cpu_to_le16(x) ((le16) __constant_cpu_to_le16(x)) |
| #define const_cpu_to_le32(x) ((le32) __constant_cpu_to_le32(x)) |
| #define const_cpu_to_le64(x) ((le64) __constant_cpu_to_le64(x)) |
| |
| #define const_sle16_to_cpu(x) ((s16) __constant_le16_to_cpu((le16) x)) |
| #define const_sle32_to_cpu(x) ((s32) __constant_le32_to_cpu((le32) x)) |
| #define const_sle64_to_cpu(x) ((s64) __constant_le64_to_cpu((le64) x)) |
| |
| #define const_cpu_to_sle16(x) ((sle16) __constant_cpu_to_le16((u16) x)) |
| #define const_cpu_to_sle32(x) ((sle32) __constant_cpu_to_le32((u32) x)) |
| #define const_cpu_to_sle64(x) ((sle64) __constant_cpu_to_le64((u64) x)) |
| |
| #define const_be16_to_cpu(x) ((u16) __constant_be16_to_cpu(x))) |
| #define const_be32_to_cpu(x) ((u32) __constant_be32_to_cpu(x))) |
| #define const_be64_to_cpu(x) ((u64) __constant_be64_to_cpu(x))) |
| |
| #define const_cpu_to_be16(x) ((be16) __constant_cpu_to_be16(x)) |
| #define const_cpu_to_be32(x) ((be32) __constant_cpu_to_be32(x)) |
| #define const_cpu_to_be64(x) ((be64) __constant_cpu_to_be64(x)) |
| |
| #define const_sbe16_to_cpu(x) ((s16) __constant_be16_to_cpu((be16) x)) |
| #define const_sbe32_to_cpu(x) ((s32) __constant_be32_to_cpu((be32) x)) |
| #define const_sbe64_to_cpu(x) ((s64) __constant_be64_to_cpu((be64) x)) |
| |
| #define const_cpu_to_sbe16(x) ((sbe16) __constant_cpu_to_be16((u16) x)) |
| #define const_cpu_to_sbe32(x) ((sbe32) __constant_cpu_to_be32((u32) x)) |
| #define const_cpu_to_sbe64(x) ((sbe64) __constant_cpu_to_be64((u64) x)) |
| |
| #endif /* defined _NTFS_ENDIANS_H */ |