client/src/proxendian.h

   1 //-----------------------------------------------------------------------------
   2 // Copyright (C) Proxmark3 contributors. See AUTHORS.md for details.
   3 //
   4 // This program is free software: you can redistribute it and/or modify
   5 // it under the terms of the GNU General Public License as published by
   6 // the Free Software Foundation, either version 3 of the License, or
   7 // (at your option) any later version.
   8 //
   9 // This program is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13 //
  14 // See LICENSE.txt for the text of the license.
  15 //-----------------------------------------------------------------------------
  16 // Endianness convenience functions
  17 //-----------------------------------------------------------------------------
  18
  19 #ifndef PROXENDIAN_H__
  20 #define PROXENDIAN_H__
  21
  22 #include "common.h"
  23
  24 #ifdef _WIN32
  25 # define HOST_LITTLE_ENDIAN
  26 #else
  27 // Only some OSes include endian.h from sys/types.h, not Termux, so let's include endian.h directly
  28 # if defined(__APPLE__)
  29 #  include <machine/endian.h>
  30 # else
  31 #  include <endian.h>
  32 # endif
  33 # if !defined(BYTE_ORDER)
  34 #  if !defined(__BYTE_ORDER) || (__BYTE_ORDER != __LITTLE_ENDIAN && __BYTE_ORDER != __BIG_ENDIAN)
  35 #   error Define BYTE_ORDER to be equal to either LITTLE_ENDIAN or BIG_ENDIAN
  36 #  endif
  37 #  if __BYTE_ORDER == __LITTLE_ENDIAN
  38 #   define HOST_LITTLE_ENDIAN
  39 #  endif
  40 # else
  41 #  if BYTE_ORDER != LITTLE_ENDIAN && BYTE_ORDER != BIG_ENDIAN
  42 #   error Define BYTE_ORDER to be equal to either LITTLE_ENDIAN or BIG_ENDIAN
  43 #  endif
  44 #  if BYTE_ORDER == LITTLE_ENDIAN
  45 #   define HOST_LITTLE_ENDIAN
  46 #  endif
  47 # endif
  48 #endif
  49
  50 #ifdef HOST_LITTLE_ENDIAN
  51 # define le16(x) (x)
  52 # define le32(x) (x)
  53 #else
  54
  55 static inline uint16_t le16(uint16_t v) {
  56     return (uint16_t)(
  57                (v >> 8) | (v << 8)
  58            );
  59 }
  60
  61 static inline uint32_t le32(uint32_t v) {
  62     return (uint32_t)(
  63                (le16(v) << 16) | (le16(v >> 16))
  64            );
  65 }
  66 #endif // HOST_LITTLE_ENDIAN
  67
  68 #endif // PROXENDIAN_H__