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diff --git a/exfat/libexfat/byteorder.h b/exfat/libexfat/byteorder.h
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+/*
+ byteorder.h (12.01.10)
+ Endianness stuff. exFAT uses little-endian byte order.
+
+ Free exFAT implementation.
+ Copyright (C) 2010-2013 Andrew Nayenko
+
+ This program 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 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; if not, write to the Free Software Foundation, Inc.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+#ifndef BYTEORDER_H_INCLUDED
+#define BYTEORDER_H_INCLUDED
+
+#define __GLIBC__
+#include <stdint.h>
+
+#if defined(__GLIBC__)
+
+#include <endian.h>
+#include <byteswap.h>
+
+#elif defined(__APPLE__)
+
+#include <machine/endian.h>
+#include <libkern/OSByteOrder.h>
+#define bswap_16(x) OSSwapInt16(x)
+#define bswap_32(x) OSSwapInt32(x)
+#define bswap_64(x) OSSwapInt64(x)
+#define __BYTE_ORDER BYTE_ORDER
+#define __LITTLE_ENDIAN LITTLE_ENDIAN
+#define __BIG_ENDIAN BIG_ENDIAN
+
+#elif defined(__FreeBSD__) || defined(__DragonFlyBSD__) || defined(__NetBSD__)
+
+#include <sys/endian.h>
+#define bswap_16(x) bswap16(x)
+#define bswap_32(x) bswap32(x)
+#define bswap_64(x) bswap64(x)
+#define __BYTE_ORDER _BYTE_ORDER
+#define __LITTLE_ENDIAN _LITTLE_ENDIAN
+#define __BIG_ENDIAN _BIG_ENDIAN
+
+#elif defined(__OpenBSD__)
+
+#include <machine/endian.h>
+#define bswap_16(x) swap16(x)
+#define bswap_32(x) swap32(x)
+#define bswap_64(x) swap64(x)
+#define __BYTE_ORDER _BYTE_ORDER
+#define __LITTLE_ENDIAN _LITTLE_ENDIAN
+#define __BIG_ENDIAN _BIG_ENDIAN
+
+#elif defined(__sun)
+
+#include <sys/byteorder.h>
+#define bswap_16(x) BSWAP_16(x)
+#define bswap_32(x) BSWAP_32(x)
+#define bswap_64(x) BSWAP_64(x)
+#define __LITTLE_ENDIAN 1234
+#define __BIG_ENDIAN 4321
+#ifdef _LITTLE_ENDIAN
+#define __BYTE_ORDER __LITTLE_ENDIAN
+#else
+#define __BYTE_ORDER __BIG_ENDIAN
+#endif
+
+#else
+#error No byte order macros available for your platform
+#endif
+
+typedef struct { uint16_t __u16; } le16_t;
+typedef struct { uint32_t __u32; } le32_t;
+typedef struct { uint64_t __u64; } le64_t;
+
+#if __BYTE_ORDER == __LITTLE_ENDIAN
+static inline uint16_t le16_to_cpu(le16_t v) { return v.__u16; }
+static inline uint32_t le32_to_cpu(le32_t v) { return v.__u32; }
+static inline uint64_t le64_to_cpu(le64_t v) { return v.__u64; }
+
+static inline le16_t cpu_to_le16(uint16_t v) { le16_t t = {v}; return t; }
+static inline le32_t cpu_to_le32(uint32_t v) { le32_t t = {v}; return t; }
+static inline le64_t cpu_to_le64(uint64_t v) { le64_t t = {v}; return t; }
+#elif __BYTE_ORDER == __BIG_ENDIAN
+static inline uint16_t le16_to_cpu(le16_t v) { return bswap_16(v.__u16); }
+static inline uint32_t le32_to_cpu(le32_t v) { return bswap_32(v.__u32); }
+static inline uint64_t le64_to_cpu(le64_t v) { return bswap_64(v.__u64); }
+
+static inline le16_t cpu_to_le16(uint16_t v)
+ { le16_t t = {bswap_16(v)}; return t; }
+static inline le32_t cpu_to_le32(uint32_t v)
+ { le32_t t = {bswap_32(v)}; return t; }
+static inline le64_t cpu_to_le64(uint64_t v)
+ { le64_t t = {bswap_64(v)}; return t; }
+#else
+#error Wow! You have a PDP machine?!
+#endif
+
+#endif /* ifndef BYTEORDER_H_INCLUDED */