include/linux/byteorder.h

#ifndef _LINUX_BYTEORDER_H
#define _LINUX_BYTEORDER_H

#include <linux/types.h>
#include <linux/swab.h>

#if defined(__LITTLE_ENDIAN) && defined(__BIG_ENDIAN)
# error Fix asm/byteorder.h to define one endianness
#endif

#if !defined(__LITTLE_ENDIAN) && !defined(__BIG_ENDIAN)
# error Fix asm/byteorder.h to define arch endianness
#endif

#ifdef __LITTLE_ENDIAN
# undef __LITTLE_ENDIAN
# define __LITTLE_ENDIAN 1234
#endif

#ifdef __BIG_ENDIAN
# undef __BIG_ENDIAN
# define __BIG_ENDIAN 4321
#endif

#if defined(__LITTLE_ENDIAN) && !defined(__LITTLE_ENDIAN_BITFIELD)
# define __LITTLE_ENDIAN_BITFIELD
#endif

#if defined(__BIG_ENDIAN) && !defined(__BIG_ENDIAN_BITFIELD)
# define __BIG_ENDIAN_BITFIELD
#endif

#ifdef __LITTLE_ENDIAN
# define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
# define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
# define __le64_to_cpu(x) ((__force __u64)(__le64)(x))
# define __cpu_to_le16(x) ((__force __le16)(__u16)(x))
# define __cpu_to_le32(x) ((__force __le32)(__u32)(x))
# define __cpu_to_le64(x) ((__force __le64)(__u64)(x))

# define __be16_to_cpu(x) __swab16((__force __u16)(__be16)(x))
# define __be32_to_cpu(x) __swab32((__force __u32)(__be32)(x))
# define __be64_to_cpu(x) __swab64((__force __u64)(__be64)(x))
# define __cpu_to_be16(x) ((__force __be16)__swab16(x))
# define __cpu_to_be32(x) ((__force __be32)__swab32(x))
# define __cpu_to_be64(x) ((__force __be64)__swab64(x))
#endif

#ifdef __BIG_ENDIAN
# define __be16_to_cpu(x) ((__force __u16)(__be16)(x))
# define __be32_to_cpu(x) ((__force __u32)(__be32)(x))
# define __be64_to_cpu(x) ((__force __u64)(__be64)(x))
# define __cpu_to_be16(x) ((__force __be16)(__u16)(x))
# define __cpu_to_be32(x) ((__force __be32)(__u32)(x))
# define __cpu_to_be64(x) ((__force __be64)(__u64)(x))

# define __le16_to_cpu(x) __swab16((__force __u16)(__le16)(x))
# define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x))
# define __le64_to_cpu(x) __swab64((__force __u64)(__le64)(x))
# define __cpu_to_le16(x) ((__force __le16)__swab16(x))
# define __cpu_to_le32(x) ((__force __le32)__swab32(x))
# define __cpu_to_le64(x) ((__force __le64)__swab64(x))
#endif

/*
 * These helpers could be phased out over time as the base version
 * handles constant folding.
 */
#define __constant_htonl(x) __cpu_to_be32(x)
#define __constant_ntohl(x) __be32_to_cpu(x)
#define __constant_htons(x) __cpu_to_be16(x)
#define __constant_ntohs(x) __be16_to_cpu(x)

#define __constant_le16_to_cpu(x) __le16_to_cpu(x)
#define __constant_le32_to_cpu(x) __le32_to_cpu(x)
#define __constant_le64_to_cpu(x) __le64_to_cpu(x)
#define __constant_be16_to_cpu(x) __be16_to_cpu(x)
#define __constant_be32_to_cpu(x) __be32_to_cpu(x)
#define __constant_be64_to_cpu(x) __be64_to_cpu(x)

#define __constant_cpu_to_le16(x) __cpu_to_le16(x)
#define __constant_cpu_to_le32(x) __cpu_to_le32(x)
#define __constant_cpu_to_le64(x) __cpu_to_le64(x)
#define __constant_cpu_to_be16(x) __cpu_to_be16(x)
#define __constant_cpu_to_be32(x) __cpu_to_be32(x)
#define __constant_cpu_to_be64(x) __cpu_to_be64(x)

static inline void __le16_to_cpus(__u16 *p)
{
#ifdef __BIG_ENDIAN
	__swab16s(p);
#endif
}

static inline void __cpu_to_le16s(__u16 *p)
{
#ifdef __BIG_ENDIAN
	__swab16s(p);
#endif
}

static inline void __le32_to_cpus(__u32 *p)
{
#ifdef __BIG_ENDIAN
	__swab32s(p);
#endif
}

static inline void __cpu_to_le32s(__u32 *p)
{
#ifdef __BIG_ENDIAN
	__swab32s(p);
#endif
}

static inline void __le64_to_cpus(__u64 *p)
{
#ifdef __BIG_ENDIAN
	__swab64s(p);
#endif
}

static inline void __cpu_to_le64s(__u64 *p)
{
#ifdef __BIG_ENDIAN
	__swab64s(p);
#endif
}

static inline void __be16_to_cpus(__u16 *p)
{
#ifdef __LITTLE_ENDIAN
	__swab16s(p);
#endif
}

static inline void __cpu_to_be16s(__u16 *p)
{
#ifdef __LITTLE_ENDIAN
	__swab16s(p);
#endif
}

static inline void __be32_to_cpus(__u32 *p)
{
#ifdef __LITTLE_ENDIAN
	__swab32s(p);
#endif
}

static inline void __cpu_to_be32s(__u32 *p)
{
#ifdef __LITTLE_ENDIAN
	__swab32s(p);
#endif
}

static inline void __be64_to_cpus(__u64 *p)
{
#ifdef __LITTLE_ENDIAN
	__swab64s(p);
#endif
}

static inline void __cpu_to_be64s(__u64 *p)
{
#ifdef __LITTLE_ENDIAN
	__swab64s(p);
#endif
}

static inline __u16 __le16_to_cpup(const __le16 *p)
{
#ifdef __LITTLE_ENDIAN
	return (__force __u16)*p;
#else
	return __swab16p((__force __u16 *)p);
#endif
}

static inline __u32 __le32_to_cpup(const __le32 *p)
{
#ifdef __LITTLE_ENDIAN
	return (__force __u32)*p;
#else
	return __swab32p((__force __u32 *)p);
#endif
}

static inline __u64 __le64_to_cpup(const __le64 *p)
{
#ifdef __LITTLE_ENDIAN
	return (__force __u64)*p;
#else
	return __swab64p((__force __u64 *)p);
#endif
}

static inline __le16 __cpu_to_le16p(const __u16 *p)
{
#ifdef __LITTLE_ENDIAN
	return (__force __le16)*p;
#else
	return (__force __le16)__swab16p(p);
#endif
}

static inline __le32 __cpu_to_le32p(const __u32 *p)
{
#ifdef __LITTLE_ENDIAN
	return (__force __le32)*p;
#else
	return (__force __le32)__swab32p(p);
#endif
}

static inline __le64 __cpu_to_le64p(const __u64 *p)
{
#ifdef __LITTLE_ENDIAN
	return (__force __le64)*p;
#else
	return (__force __le64)__swab64p(p);
#endif
}

static inline __u16 __be16_to_cpup(const __be16 *p)
{
#ifdef __BIG_ENDIAN
	return (__force __u16)*p;
#else
	return __swab16p((__force __u16 *)p);
#endif
}

static inline __u32 __be32_to_cpup(const __be32 *p)
{
#ifdef __BIG_ENDIAN
	return (__force __u32)*p;
#else
	return __swab32p((__force __u32 *)p);
#endif
}

static inline __u64 __be64_to_cpup(const __be64 *p)
{
#ifdef __BIG_ENDIAN
	return (__force __u64)*p;
#else
	return __swab64p((__force __u64 *)p);
#endif
}

static inline __be16 __cpu_to_be16p(const __u16 *p)
{
#ifdef __BIG_ENDIAN
	return (__force __be16)*p;
#else
	return (__force __be16)__swab16p(p);
#endif
}

static inline __be32 __cpu_to_be32p(const __u32 *p)
{
#ifdef __BIG_ENDIAN
	return (__force __be32)*p;
#else
	return (__force __be32)__swab32p(p);
#endif
}

static inline __be64 __cpu_to_be64p(const __u64 *p)
{
#ifdef __BIG_ENDIAN
	return (__force __be64)*p;
#else
	return (__force __be64)__swab64p(p);
#endif
}

#ifdef __KERNEL__

# define le16_to_cpu __le16_to_cpu
# define le32_to_cpu __le32_to_cpu
# define le64_to_cpu __le64_to_cpu
# define be16_to_cpu __be16_to_cpu
# define be32_to_cpu __be32_to_cpu
# define be64_to_cpu __be64_to_cpu
# define cpu_to_le16 __cpu_to_le16
# define cpu_to_le32 __cpu_to_le32
# define cpu_to_le64 __cpu_to_le64
# define cpu_to_be16 __cpu_to_be16
# define cpu_to_be32 __cpu_to_be32
# define cpu_to_be64 __cpu_to_be64

# define le16_to_cpup __le16_to_cpup
# define le32_to_cpup __le32_to_cpup
# define le64_to_cpup __le64_to_cpup
# define be16_to_cpup __be16_to_cpup
# define be32_to_cpup __be32_to_cpup
# define be64_to_cpup __be64_to_cpup
# define cpu_to_le16p __cpu_to_le16p
# define cpu_to_le32p __cpu_to_le32p
# define cpu_to_le64p __cpu_to_le64p
# define cpu_to_be16p __cpu_to_be16p
# define cpu_to_be32p __cpu_to_be32p
# define cpu_to_be64p __cpu_to_be64p

# define le16_to_cpus __le16_to_cpus
# define le32_to_cpus __le32_to_cpus
# define le64_to_cpus __le64_to_cpus
# define be16_to_cpus __be16_to_cpus
# define be32_to_cpus __be32_to_cpus
# define be64_to_cpus __be64_to_cpus
# define cpu_to_le16s __cpu_to_le16s
# define cpu_to_le32s __cpu_to_le32s
# define cpu_to_le64s __cpu_to_le64s
# define cpu_to_be16s __cpu_to_be16s
# define cpu_to_be32s __cpu_to_be32s
# define cpu_to_be64s __cpu_to_be64s

/*
 * They have to be macros in order to do the constant folding
 * correctly - if the argument passed into a inline function
 * it is no longer constant according to gcc..
 */
# undef ntohl
# undef ntohs
# undef htonl
# undef htons

# define ___htonl(x) __cpu_to_be32(x)
# define ___htons(x) __cpu_to_be16(x)
# define ___ntohl(x) __be32_to_cpu(x)
# define ___ntohs(x) __be16_to_cpu(x)

# define htonl(x) ___htonl(x)
# define ntohl(x) ___ntohl(x)
# define htons(x) ___htons(x)
# define ntohs(x) ___ntohs(x)

static inline void le16_add_cpu(__le16 *var, u16 val)
{
	*var = cpu_to_le16(le16_to_cpup(var) + val);
}

static inline void le32_add_cpu(__le32 *var, u32 val)
{
	*var = cpu_to_le32(le32_to_cpup(var) + val);
}

static inline void le64_add_cpu(__le64 *var, u64 val)
{
	*var = cpu_to_le64(le64_to_cpup(var) + val);
}

static inline void be16_add_cpu(__be16 *var, u16 val)
{
	*var = cpu_to_be16(be16_to_cpup(var) + val);
}

static inline void be32_add_cpu(__be32 *var, u32 val)
{
	*var = cpu_to_be32(be32_to_cpup(var) + val);
}

static inline void be64_add_cpu(__be64 *var, u64 val)
{
	*var = cpu_to_be64(be64_to_cpup(var) + val);
}

#endif /* __KERNEL__ */
#endif /* _LINUX_BYTEORDER_H */