--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Orthanc/Core/Endianness.h	Thu Jun 09 17:04:58 2016 +0200
@@ -0,0 +1,157 @@
+/**
+ * Orthanc - A Lightweight, RESTful DICOM Store
+ * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
+ * Department, University Hospital of Liege, Belgium
+ *
+ * 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 3 of the
+ * License, or (at your option) any later version.
+ *
+ * In addition, as a special exception, the copyright holders of this
+ * program give permission to link the code of its release with the
+ * OpenSSL project's "OpenSSL" library (or with modified versions of it
+ * that use the same license as the "OpenSSL" library), and distribute
+ * the linked executables. You must obey the GNU General Public License
+ * in all respects for all of the code used other than "OpenSSL". If you
+ * modify file(s) with this exception, you may extend this exception to
+ * your version of the file(s), but you are not obligated to do so. If
+ * you do not wish to do so, delete this exception statement from your
+ * version. If you delete this exception statement from all source files
+ * in the program, then also delete it here.
+ * 
+ * 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, see <http://www.gnu.org/licenses/>.
+ **/
+
+
+#pragma once
+
+
+/********************************************************************
+ ** LINUX ARCHITECTURES
+ ********************************************************************/
+
+#if defined(__linux__)
+#  define ORTHANC_HAS_BUILTIN_BYTE_SWAP 1
+#  include <endian.h>
+#endif
+
+
+/********************************************************************
+ ** WINDOWS ARCHITECTURES
+ **
+ ** On Windows x86, "host" will always be little-endian ("le").
+ ********************************************************************/
+
+#if defined(_WIN32)
+#  if defined(_MSC_VER)
+//   Visual Studio - http://msdn.microsoft.com/en-us/library/a3140177.aspx
+#    define ORTHANC_HAS_BUILTIN_BYTE_SWAP 1
+#    define be16toh(x) _byteswap_ushort(x)
+#    define be32toh(x) _byteswap_ulong(x)
+#    define be64toh(x) _byteswap_uint64(x)
+#  elif (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3))
+//   MinGW >= 4.3 - Use builtin intrinsic for byte swapping
+#    define ORTHANC_HAS_BUILTIN_BYTE_SWAP 1
+#    define be16toh(x) __builtin_bswap16(x)
+#    define be32toh(x) __builtin_bswap32(x)
+#    define be64toh(x) __builtin_bswap64(x)
+#  else
+//   MinGW <= 4.2, we must manually implement the byte swapping
+#    define ORTHANC_HAS_BUILTIN_BYTE_SWAP 0
+#    define be16toh(x) __orthanc_bswap16(x)
+#    define be32toh(x) __orthanc_bswap32(x)
+#    define be64toh(x) __orthanc_bswap64(x)
+#  endif
+
+#  define htobe16(x) be16toh(x)
+#  define htobe32(x) be32toh(x)
+#  define htobe64(x) be64toh(x)
+
+#  define htole16(x) x
+#  define htole32(x) x
+#  define htole64(x) x
+
+#  define le16toh(x) x
+#  define le32toh(x) x
+#  define le64toh(x) x
+#endif
+
+
+/********************************************************************
+ ** FREEBSD ARCHITECTURES
+ ********************************************************************/
+
+#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
+#  define ORTHANC_HAS_BUILTIN_BYTE_SWAP 1
+#  include <arpa/inet.h>
+#endif
+
+
+/********************************************************************
+ ** APPLE ARCHITECTURES (including OS X)
+ ********************************************************************/
+
+#if defined(__APPLE__)
+#  define ORTHANC_HAS_BUILTIN_BYTE_SWAP 1
+#  include <libkern/OSByteOrder.h>
+#  define be16toh(x) OSSwapBigToHostInt16(x)
+#  define be32toh(x) OSSwapBigToHostInt32(x)
+#  define be64toh(x) OSSwapBigToHostInt64(x)
+
+#  define htobe16(x) OSSwapHostToBigInt16(x)
+#  define htobe32(x) OSSwapHostToBigInt32(x)
+#  define htobe64(x) OSSwapHostToBigInt64(x)
+
+#  define htole16(x) OSSwapHostToLittleInt16(x)
+#  define htole32(x) OSSwapHostToLittleInt32(x)
+#  define htole64(x) OSSwapHostToLittleInt64(x)
+
+#  define le16toh(x) OSSwapLittleToHostInt16(x)
+#  define le32toh(x) OSSwapLittleToHostInt32(x)
+#  define le64toh(x) OSSwapLittleToHostInt64(x)
+#endif
+
+
+/********************************************************************
+ ** PORTABLE (BUT SLOW) IMPLEMENTATION OF BYTE-SWAPPING
+ ********************************************************************/
+
+#if ORTHANC_HAS_BUILTIN_BYTE_SWAP != 1
+
+#include <stdint.h>
+
+static inline uint16_t __orthanc_bswap16(uint16_t a)
+{
+  return (a << 8) | (a >> 8);
+}
+
+static inline uint32_t __orthanc_bswap32(uint32_t a)
+{
+  const uint8_t* p = reinterpret_cast<const uint8_t*>(&a);
+  return (static_cast<uint32_t>(p[0]) << 24 |
+          static_cast<uint32_t>(p[1]) << 16 |
+          static_cast<uint32_t>(p[2]) << 8 |
+          static_cast<uint32_t>(p[3]));
+}
+
+static inline uint64_t __orthanc_bswap64(uint64_t a)
+{
+  const uint8_t* p = reinterpret_cast<const uint8_t*>(&a);
+  return (static_cast<uint64_t>(p[0]) << 56 |
+          static_cast<uint64_t>(p[1]) << 48 |
+          static_cast<uint64_t>(p[2]) << 40 |
+          static_cast<uint64_t>(p[3]) << 32 |
+          static_cast<uint64_t>(p[4]) << 24 |
+          static_cast<uint64_t>(p[5]) << 16 |
+          static_cast<uint64_t>(p[6]) << 8 |
+          static_cast<uint64_t>(p[7]));
+}
+
+#endif