LinuxGUI/Ventoy2Disk/Lib/exfat/src/libexfat/byteorder.h

   1 /*
   2         byteorder.h (12.01.10)
   3         Endianness stuff. exFAT uses little-endian byte order.
   4
   5         Free exFAT implementation.
   6         Copyright (C) 2010-2018  Andrew Nayenko
   7
   8         This program is free software; you can redistribute it and/or modify
   9         it under the terms of the GNU General Public License as published by
  10         the Free Software Foundation, either version 2 of the License, or
  11         (at your option) any later version.
  12
  13         This program is distributed in the hope that it will be useful,
  14         but WITHOUT ANY WARRANTY; without even the implied warranty of
  15         MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16         GNU General Public License for more details.
  17
  18         You should have received a copy of the GNU General Public License along
  19         with this program; if not, write to the Free Software Foundation, Inc.,
  20         51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  21 */
  22
  23 #ifndef BYTEORDER_H_INCLUDED
  24 #define BYTEORDER_H_INCLUDED
  25
  26 #include "platform.h"
  27 #include <stdint.h>
  28 #include <stddef.h>
  29
  30 typedef struct { uint16_t __u16; } le16_t;
  31 typedef struct { uint32_t __u32; } le32_t;
  32 typedef struct { uint64_t __u64; } le64_t;
  33
  34 #if EXFAT_BYTE_ORDER == EXFAT_LITTLE_ENDIAN
  35
  36 static inline uint16_t le16_to_cpu(le16_t v) { return v.__u16; }
  37 static inline uint32_t le32_to_cpu(le32_t v) { return v.__u32; }
  38 static inline uint64_t le64_to_cpu(le64_t v) { return v.__u64; }
  39
  40 static inline le16_t cpu_to_le16(uint16_t v) { le16_t t = {v}; return t; }
  41 static inline le32_t cpu_to_le32(uint32_t v) { le32_t t = {v}; return t; }
  42 static inline le64_t cpu_to_le64(uint64_t v) { le64_t t = {v}; return t; }
  43
  44 typedef size_t bitmap_t;
  45
  46 #elif EXFAT_BYTE_ORDER == EXFAT_BIG_ENDIAN
  47
  48 static inline uint16_t le16_to_cpu(le16_t v)
  49         { return exfat_bswap16(v.__u16); }
  50 static inline uint32_t le32_to_cpu(le32_t v)
  51         { return exfat_bswap32(v.__u32); }
  52 static inline uint64_t le64_to_cpu(le64_t v)
  53         { return exfat_bswap64(v.__u64); }
  54
  55 static inline le16_t cpu_to_le16(uint16_t v)
  56         { le16_t t = {exfat_bswap16(v)}; return t; }
  57 static inline le32_t cpu_to_le32(uint32_t v)
  58         { le32_t t = {exfat_bswap32(v)}; return t; }
  59 static inline le64_t cpu_to_le64(uint64_t v)
  60         { le64_t t = {exfat_bswap64(v)}; return t; }
  61
  62 typedef unsigned char bitmap_t;
  63
  64 #else
  65 #error Wow! You have a PDP machine?!
  66 #endif
  67
  68 #endif /* ifndef BYTEORDER_H_INCLUDED */