Diff: endianness.h

Revision:

0:b47c2a7920c2

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/endianness.h	Fri Mar 16 16:34:18 2018 +0000
@@ -0,0 +1,93 @@
+///\file
+
+/******************************************************************************
+The MIT License(MIT)
+
+Embedded Template Library.
+https://github.com/ETLCPP/etl
+http://www.etlcpp.com
+
+Copyright(c) 2014 jwellbelove
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files(the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and / or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions :
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+******************************************************************************/
+
+#ifndef __ETL_ENDIAN__
+#define __ETL_ENDIAN__
+
+#include <stdint.h>
+
+#include "platform.h"
+#include "enum_type.h"
+
+///\defgroup endian endian
+/// Constants & utilities for endianess
+///\ingroup utilities
+
+namespace etl
+{
+  //***************************************************************************
+  /// Constants to denote endianness of operations.
+  ///\ingroup endian
+  //***************************************************************************
+  struct endian
+  {
+    enum enum_type
+    {
+      little,
+      big,
+      native
+    };
+
+    ETL_DECLARE_ENUM_TYPE(endian, int)
+    ETL_ENUM_TYPE(little, "little")
+    ETL_ENUM_TYPE(big,    "big")
+    ETL_ENUM_TYPE(native, "native")
+    ETL_END_ENUM_TYPE
+  };
+
+  //***************************************************************************
+  /// Checks the endianness of the platform.
+  ///\ingroup endian
+  //***************************************************************************
+  struct endianness
+  {
+    endianness()
+      : ETL_ENDIAN_TEST(0x0011223344556677)
+    {
+    }
+
+    endian operator ()() const
+    {
+      return endian(*this);
+    }
+
+    operator endian() const
+    {
+      return (*reinterpret_cast<const uint32_t*>(&ETL_ENDIAN_TEST) == 0x44556677) ? endian::little : endian::big;
+    }
+
+  private:
+
+    const uint64_t ETL_ENDIAN_TEST;
+  };
+}
+
+#endif
+