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/* * Copyright 2002-2004 by Hans Reiser, licensing governed by * reiserfsprogs/README */ #ifndef REISERFSPROGS_SWAB_H #define REISERFSPROGS_SWAB_H #include #include #define __constant_swab16(x) ((__u16)( \ (((__u16)(x) & (__u16)0x00ffU) << 8) | \ (((__u16)(x) & (__u16)0xff00U) >> 8) )) #define __swab16(x) \ ({ \ __u16 __x = (x); \ __constant_swab16(__x); \ }) #define __constant_swab32(x) ((__u32)( \ (((__u32)(x) & (__u32)0x000000ffUL) << 24) | \ (((__u32)(x) & (__u32)0x0000ff00UL) << 8) | \ (((__u32)(x) & (__u32)0x00ff0000UL) >> 8) | \ (((__u32)(x) & (__u32)0xff000000UL) >> 24))) #define __swab32(x) \ ({ \ __u32 __x = (x); \ __constant_swab32(__x); \ }) #define __constant_swab64(x) ((__u64)( \ (((__u64)(x) & (__u64)0x00000000000000ffULL) << 56) | \ (((__u64)(x) & (__u64)0x000000000000ff00ULL) << 40) | \ (((__u64)(x) & (__u64)0x0000000000ff0000ULL) << 24) | \ (((__u64)(x) & (__u64)0x00000000ff000000ULL) << 8) | \ (((__u64)(x) & (__u64)0x000000ff00000000ULL) >> 8) | \ (((__u64)(x) & (__u64)0x0000ff0000000000ULL) >> 24) | \ (((__u64)(x) & (__u64)0x00ff000000000000ULL) >> 40) | \ (((__u64)(x) & (__u64)0xff00000000000000ULL) >> 56))) #define __swab64(x) \ ({ \ __u64 __x = (x); \ __constant_swab64(__x); \ }) #ifndef le32_to_cpu #ifdef __CHECKER__ #define __force __attribute__((force)) #else #define __force #endif #if __BYTE_ORDER == __LITTLE_ENDIAN #define cpu_to_le64(x) ((__force __le64)(__u64)(x)) #define le64_to_cpu(x) ((__force __u64)(__le64)(x)) #define cpu_to_le32(x) ((__force __le32)(__u32)(x)) #define le32_to_cpu(x) ((__force __u32)(__le32)(x)) #define cpu_to_le16(x) ((__force __le16)(__u16)(x)) #define le16_to_cpu(x) ((__force __u16)(__le16)(x)) #define constant_cpu_to_le64(x) ((__force __le64)(__u64)(x)) #define constant_le64_to_cpu(x) ((__force __u64)(__le64)(x)) #define constant_cpu_to_le32(x) ((__force __le32)(__u32)(x)) #define constant_le32_to_cpu(x) ((__force __u32)(__le32)(x)) #define constant_cpu_to_le16(x) ((__force __le16)(__u16)(x)) #define constant_le16_to_cpu(x) ((__force __u16)(__le16)(x)) #elif __BYTE_ORDER == __BIG_ENDIAN #define cpu_to_le64(x) ((__force __le64)__swab64((x))) #define le64_to_cpu(x) __swab64((__force __u64)(__le64)(x)) #define cpu_to_le32(x) ((__force __le32)__swab32((x))) #define le32_to_cpu(x) __swab32((__force __u32)(__le32)(x)) #define cpu_to_le16(x) ((__force __le16)__swab16((x))) #define le16_to_cpu(x) __swab16((__force __u16)(__le16)(x)) #define constant_cpu_to_le64(x) ((__force __le64)__constant_swab64((x))) #define constant_le64_to_cpu(x) __constant_swab64((__force __u64)(__le64)(x)) #define constant_cpu_to_le32(x) ((__force __le32)__constant_swab32((x))) #define constant_le32_to_cpu(x) __constant_swab32((__force __u32)(__le32)(x)) #define constant_cpu_to_le16(x) ((__force __le16)__constant_swab16((x))) #define constant_le16_to_cpu(x) __constant_swab16((__force __u16)(__le16)(x)) #else # error "nuxi/pdp-endian archs are not supported" #endif #endif #endif /* REISERFS_SWAB_H */