comparison DEPENDENCIES/generic/include/boost/predef/other/endian.h @ 16:2665513ce2d3

Add boost headers

+/*
+Copyright Redshift Software, Inc. 2013
+Distributed under the Boost Software License, Version 1.0.
+(See accompanying file LICENSE_1_0.txt or copy at
+http://www.boost.org/LICENSE_1_0.txt)
+*/
+
+#ifndef BOOST_PREDEF_ENDIAN_H
+#define BOOST_PREDEF_ENDIAN_H
+
+#include <boost/predef/version_number.h>
+#include <boost/predef/make.h>
+#include <boost/predef/library/c/gnu.h>
+#include <boost/predef/os/macos.h>
+#include <boost/predef/os/bsd.h>
+
+/*`
+[heading `BOOST_ENDIAN_*`]
+
+Detection of endian memory ordering. There are four defined macros
+in this header that define the various generally possible endian
+memory orderings:
+
+* `BOOST_ENDIAN_BIG_BYTE`, byte-swapped big-endian.
+* `BOOST_ENDIAN_BIG_WORD`, word-swapped big-endian.
+* `BOOST_ENDIAN_LITTLE_BYTE`, byte-swapped little-endian.
+* `BOOST_ENDIAN_LITTLE_WORD`, word-swapped little-endian.
+
+The detection is conservative in that it only identifies endianness
+that it knows for certain. In particular bi-endianness is not
+indicated as is it not practically possible to determine the
+endianness from anything but an operating system provided
+header. And the currently known headers do not define that
+programatic bi-endianness is available.
+
+This implementation is a compilation of various publicly available
+information and acquired knowledge:
+
+# The indispensable documentation of "Pre-defined Compiler Macros"
+  [@http://sourceforge.net/p/predef/wiki/Endianness Endianness].
+# The various endian specifications available in the
+  [@http://wikipedia.org/ Wikipedia] computer architecture pages.
+# Generally available searches for headers that define endianness.
+ */
+
+#define BOOST_ENDIAN_BIG_BYTE BOOST_VERSION_NUMBER_NOT_AVAILABLE
+#define BOOST_ENDIAN_BIG_WORD BOOST_VERSION_NUMBER_NOT_AVAILABLE
+#define BOOST_ENDIAN_LITTLE_BYTE BOOST_VERSION_NUMBER_NOT_AVAILABLE
+#define BOOST_ENDIAN_LITTLE_WORD BOOST_VERSION_NUMBER_NOT_AVAILABLE
+
+/* GNU libc provides a header defining __BYTE_ORDER, or _BYTE_ORDER.
+ * And some OSs provide some for of endian header also.
+ */
+#if !BOOST_ENDIAN_BIG_BYTE && !BOOST_ENDIAN_BIG_WORD && \
+    !BOOST_ENDIAN_LITTLE_BYTE && !BOOST_ENDIAN_LITTLE_WORD
+#   if BOOST_LIB_C_GNU
+#       include <endian.h>
+#   else
+#       if BOOST_OS_MACOS
+#           include <machine/endian.h>
+#       else
+#           if BOOST_OS_BSD
+#               if BOOST_OS_BSD_OPEN
+#                   include <machine/endian.h>
+#               else
+#                   include <sys/endian.h>
+#               endif
+#           endif
+#       endif
+#   endif
+#   if defined(__BYTE_ORDER)
+#       if (__BYTE_ORDER == __BIG_ENDIAN)
+#           undef BOOST_ENDIAN_BIG_BYTE
+#           define BOOST_ENDIAN_BIG_BYTE BOOST_VERSION_NUMBER_AVAILABLE
+#       endif
+#       if (__BYTE_ORDER == __LITTLE_ENDIAN)
+#           undef BOOST_ENDIAN_LITTLE_BYTE
+#           define BOOST_ENDIAN_LITTLE_BYTE BOOST_VERSION_NUMBER_AVAILABLE
+#       endif
+#       if (__BYTE_ORDER == __PDP_ENDIAN)
+#           undef BOOST_ENDIAN_LITTLE_WORD
+#           define BOOST_ENDIAN_LITTLE_WORD BOOST_VERSION_NUMBER_AVAILABLE
+#       endif
+#   endif
+#   if !defined(__BYTE_ORDER) && defined(_BYTE_ORDER)
+#       if (_BYTE_ORDER == _BIG_ENDIAN)
+#           undef BOOST_ENDIAN_BIG_BYTE
+#           define BOOST_ENDIAN_BIG_BYTE BOOST_VERSION_NUMBER_AVAILABLE
+#       endif
+#       if (_BYTE_ORDER == _LITTLE_ENDIAN)
+#           undef BOOST_ENDIAN_LITTLE_BYTE
+#           define BOOST_ENDIAN_LITTLE_BYTE BOOST_VERSION_NUMBER_AVAILABLE
+#       endif
+#       if (_BYTE_ORDER == _PDP_ENDIAN)
+#           undef BOOST_ENDIAN_LITTLE_WORD
+#           define BOOST_ENDIAN_LITTLE_WORD BOOST_VERSION_NUMBER_AVAILABLE
+#       endif
+#   endif
+#endif
+
+/* Built-in byte-swpped big-endian macros.
+ */
+#if !BOOST_ENDIAN_BIG_BYTE && !BOOST_ENDIAN_BIG_WORD && \
+    !BOOST_ENDIAN_LITTLE_BYTE && !BOOST_ENDIAN_LITTLE_WORD
+#   if !BOOST_ENDIAN_BIG_BYTE
+#       if (defined(__BIG_ENDIAN__) && !defined(__LITTLE_ENDIAN__)) || \
+            defined(__ARMEB__) || \
+            defined(__THUMBEB__) || \
+            defined(__AARCH64EB__) || \
+            defined(_MIPSEB) || \
+            defined(__MIPSEB) || \
+            defined(__MIPSEB__)
+#           undef BOOST_ENDIAN_BIG_BYTE
+#           define BOOST_ENDIAN_BIG_BYTE BOOST_VERSION_NUMBER_AVAILABLE
+#       endif
+#   endif
+#endif
+
+/* Built-in byte-swpped little-endian macros.
+ */
+#if !BOOST_ENDIAN_BIG_BYTE && !BOOST_ENDIAN_BIG_WORD && \
+    !BOOST_ENDIAN_LITTLE_BYTE && !BOOST_ENDIAN_LITTLE_WORD
+#   if !BOOST_ENDIAN_LITTLE_BYTE
+#       if (defined(__LITTLE_ENDIAN__) && !defined(__BIG_ENDIAN__)) || \
+            defined(__ARMEL__) || \
+            defined(__THUMBEL__) || \
+            defined(__AARCH64EL__) || \
+            defined(_MIPSEL) || \
+            defined(__MIPSEL) || \
+            defined(__MIPSEL__)
+#           undef BOOST_ENDIAN_LITTLE_BYTE
+#           define BOOST_ENDIAN_LITTLE_BYTE BOOST_VERSION_NUMBER_AVAILABLE
+#       endif
+#   endif
+#endif
+
+/* Some architectures are strictly one endianess (as opposed
+ * the current common bi-endianess).
+ */
+#if !BOOST_ENDIAN_BIG_BYTE && !BOOST_ENDIAN_BIG_WORD && \
+    !BOOST_ENDIAN_LITTLE_BYTE && !BOOST_ENDIAN_LITTLE_WORD
+#   include <boost/predef/architecture.h>
+#   if BOOST_ARCH_M68K || \
+        BOOST_ARCH_PARISK || \
+        BOOST_ARCH_SYS370 || \
+        BOOST_ARCH_SYS390 || \
+        BOOST_ARCH_Z
+#       undef BOOST_ENDIAN_BIG_BYTE
+#       define BOOST_ENDIAN_BIG_BYTE BOOST_VERSION_NUMBER_AVAILABLE
+#   endif
+#   if BOOST_ARCH_AMD64 || \
+        BOOST_ARCH_IA64 || \
+        BOOST_ARCH_X86 || \
+        BOOST_ARCH_BLACKFIN
+#       undef BOOST_ENDIAN_LITTLE_BYTE
+#       define BOOST_ENDIAN_LITTLE_BYTE BOOST_VERSION_NUMBER_AVAILABLE
+#   endif
+#endif
+
+/* Windows on ARM, if not otherwise detected/specified, is always
+ * byte-swaped little-endian.
+ */
+#if !BOOST_ENDIAN_BIG_BYTE && !BOOST_ENDIAN_BIG_WORD && \
+    !BOOST_ENDIAN_LITTLE_BYTE && !BOOST_ENDIAN_LITTLE_WORD
+#   if BOOST_ARCH_ARM
+#       include <boost/predef/os/windows.h>
+#       if BOOST_OS_WINDOWS
+#           undef BOOST_ENDIAN_LITTLE_BYTE
+#           define BOOST_ENDIAN_LITTLE_BYTE BOOST_VERSION_NUMBER_AVAILABLE
+#       endif
+#   endif
+#endif
+
+#if BOOST_ENDIAN_BIG_BYTE
+#   define BOOST_ENDIAN_BIG_BYTE_AVAILABLE
+#endif
+#if BOOST_ENDIAN_BIG_WORD
+#   define BOOST_ENDIAN_BIG_WORD_BYTE_AVAILABLE
+#endif
+#if BOOST_ENDIAN_LITTLE_BYTE
+#   define BOOST_ENDIAN_LITTLE_BYTE_AVAILABLE
+#endif
+#if BOOST_ENDIAN_LITTLE_WORD
+#   define BOOST_ENDIAN_LITTLE_WORD_BYTE_AVAILABLE
+#endif
+
+#define BOOST_ENDIAN_BIG_BYTE_NAME "Byte-Swapped Big-Endian"
+#define BOOST_ENDIAN_BIG_WORD_NAME "Word-Swapped Big-Endian"
+#define BOOST_ENDIAN_LITTLE_BYTE_NAME "Byte-Swapped Little-Endian"
+#define BOOST_ENDIAN_LITTLE_WORD_NAME "Word-Swapped Little-Endian"
+
+#include <boost/predef/detail/test.h>
+BOOST_PREDEF_DECLARE_TEST(BOOST_ENDIAN_BIG_BYTE,BOOST_ENDIAN_BIG_BYTE_NAME)
+
+#include <boost/predef/detail/test.h>
+BOOST_PREDEF_DECLARE_TEST(BOOST_ENDIAN_BIG_WORD,BOOST_ENDIAN_BIG_WORD_NAME)
+
+#include <boost/predef/detail/test.h>
+BOOST_PREDEF_DECLARE_TEST(BOOST_ENDIAN_LITTLE_BYTE,BOOST_ENDIAN_LITTLE_BYTE_NAME)
+
+#include <boost/predef/detail/test.h>
+BOOST_PREDEF_DECLARE_TEST(BOOST_ENDIAN_LITTLE_WORD,BOOST_ENDIAN_LITTLE_WORD_NAME)
+
+
+#endif