Change to more portable way to handle endianness

Signed-off-by: Stany MARCEL <stanypub@gmail.com>

amiibo.c

@@ -10,7 +10,7 @@
 #include "mbedtls/md.h"
 #include "mbedtls/aes.h"
 #include <errno.h>
-#include <endian.h>
+#include "portable_endian.h"
 
 
 #define HMAC_POS_DATA 0x008

portable_endian.h

@@ -0,0 +1,121 @@
+// "License": Public Domain
+// I, Mathias Panzenböck, place this file hereby into the public domain. Use it at your own risk for whatever you like.
+// In case there are jurisdictions that don't support putting things in the public domain you can also consider it to
+// be "dual licensed" under the BSD, MIT and Apache licenses, if you want to. This code is trivial anyway. Consider it
+// an example on how to get the endian conversion functions on different platforms.
+
+#ifndef PORTABLE_ENDIAN_H__
+#define PORTABLE_ENDIAN_H__
+
+#if (defined(_WIN16) || defined(_WIN32) || defined(_WIN64)) && !defined(__WINDOWS__)
+
+#       define __WINDOWS__
+
+#endif
+
+#if defined(__linux__) || defined(__CYGWIN__)
+
+#       include <endian.h>
+
+#elif defined(__APPLE__)
+
+#       include <libkern/OSByteOrder.h>
+
+#       define htobe16(x) OSSwapHostToBigInt16(x)
+#       define htole16(x) OSSwapHostToLittleInt16(x)
+#       define be16toh(x) OSSwapBigToHostInt16(x)
+#       define le16toh(x) OSSwapLittleToHostInt16(x)
+
+#       define htobe32(x) OSSwapHostToBigInt32(x)
+#       define htole32(x) OSSwapHostToLittleInt32(x)
+#       define be32toh(x) OSSwapBigToHostInt32(x)
+#       define le32toh(x) OSSwapLittleToHostInt32(x)
+
+#       define htobe64(x) OSSwapHostToBigInt64(x)
+#       define htole64(x) OSSwapHostToLittleInt64(x)
+#       define be64toh(x) OSSwapBigToHostInt64(x)
+#       define le64toh(x) OSSwapLittleToHostInt64(x)
+
+#       define __BYTE_ORDER    BYTE_ORDER
+#       define __BIG_ENDIAN    BIG_ENDIAN
+#       define __LITTLE_ENDIAN LITTLE_ENDIAN
+#       define __PDP_ENDIAN    PDP_ENDIAN
+
+#elif defined(__OpenBSD__)
+
+#       include <sys/endian.h>
+
+#elif defined(__NetBSD__) || defined(__FreeBSD__) || defined(__DragonFly__)
+
+#       include <sys/endian.h>
+
+#       define be16toh(x) betoh16(x)
+#       define le16toh(x) letoh16(x)
+
+#       define be32toh(x) betoh32(x)
+#       define le32toh(x) letoh32(x)
+
+#       define be64toh(x) betoh64(x)
+#       define le64toh(x) letoh64(x)
+
+#elif defined(__WINDOWS__)
+
+#       include <windows.h>
+
+#       if BYTE_ORDER == LITTLE_ENDIAN
+
+#               if defined(_MSC_VER)
+#                       include <stdlib.h>
+#                       define htobe16(x) _byteswap_ushort(x)
+#                       define htole16(x) (x)
+#                       define be16toh(x) _byteswap_ushort(x)
+#                       define le16toh(x) (x)
+
+#                       define htobe32(x) _byteswap_ulong(x)
+#                       define htole32(x) (x)
+#                       define be32toh(x) _byteswap_ulong(x)
+#                       define le32toh(x) (x)
+
+#                       define htobe64(x) _byteswap_uint64(x)
+#                       define htole64(x) (x)
+#                       define be64toh(x) _byteswap_uint64(x)
+#                       define le64toh(x) (x)
+
+#               elif defined(__GNUC__) || defined(__clang__)
+
+#                       define htobe16(x) __builtin_bswap16(x)
+#                       define htole16(x) (x)
+#                       define be16toh(x) __builtin_bswap16(x)
+#                       define le16toh(x) (x)
+
+#                       define htobe32(x) __builtin_bswap32(x)
+#                       define htole32(x) (x)
+#                       define be32toh(x) __builtin_bswap32(x)
+#                       define le32toh(x) (x)
+
+#                       define htobe64(x) __builtin_bswap64(x)
+#                       define htole64(x) (x)
+#                       define be64toh(x) __builtin_bswap64(x)
+#                       define le64toh(x) (x)
+#               else
+#                       error platform not supported
+#               endif
+
+#       else
+
+#               error byte order not supported
+
+#       endif
+
+#       define __BYTE_ORDER    BYTE_ORDER
+#       define __BIG_ENDIAN    BIG_ENDIAN
+#       define __LITTLE_ENDIAN LITTLE_ENDIAN
+#       define __PDP_ENDIAN    PDP_ENDIAN
+
+#else
+
+#       error platform not supported
+
+#endif
+
+#endif