Add endian.h header for byte order detection. Ensure that headers can be

included individually.
2026-02-22 03:32:18 +00:00 · 2013-03-18 23:06:06 -05:00
parent 9fcecba7cc
commit 99ed654ccd
34 changed files with 228 additions and 44 deletions
--- a/include/boost/predef.h
+++ b/include/boost/predef.h
@@ -13,5 +13,6 @@ http://www.boost.org/LICENSE_1_0.txt)
 #include <boost/predef/compiler.h>
 #include <boost/predef/library.h>
 #include <boost/predef/os.h>
+#include <boost/predef/endian.h>

 #endif
--- a/include/boost/predef/endian.h
+++ b/include/boost/predef/endian.h
@@ -0,0 +1,130 @@
+/*
+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.h>
+
+/*`
+[heading `BOOST_ENDIAN_BIG_BYTE`, `BOOST_ENDIAN_LITTLE_BYTE`, `BOOST_ENDIAN_BIG_WORD`, `BOOST_ENDIAN_LITTLE_WORD`]
+
+Detection of endian memory ordering.
+ */
+
+#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 __BYT_ORDER. */
+#if BOOST_LIB_C_GNU
+#   include <endian.h>
+#endif
+
+/* GNU libc style __BYTE_ORDER macros. */
+#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
+
+/* Built-in byte-swpped big-endian macros. */
+#if !BOOST_ENDIAN_BIG_BYTE
+#   if defined(__BIG_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
+
+/* Built-in byte-swapped little-endian macros. */
+#if !BOOST_ENDIAN_LITTLE_BYTE
+#   if defined(__LITTLE_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
+
+/* 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
+#       undef BOOST_ENDIAN_LITTLE_BYTE
+#       define BOOST_ENDIAN_LITTLE_BYTE BOOST_VERSION_NUMBER_AVAILABLE
+#   endif
+#endif
+
+#if BOOST_ENDIAN_BIG_BYTE
+#   define BOOST_ENDIAN_BIG_BYTE_AVAILABLE
+#endif
+#if BOOST_ENDIAN_BIG_WORD_BYTE
+#   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_BYTE
+#   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
--- a/include/boost/predef/library/c.h
+++ b/include/boost/predef/library/c.h
@@ -8,7 +8,7 @@ http://www.boost.org/LICENSE_1_0.txt)
 #ifndef BOOST_PREDEF_LIBRARY_C_H
 #define BOOST_PREDEF_LIBRARY_C_H

-#include <boost/predef/detail/_cassert.h>
+#include <boost/predef/library/c/_prefix.h>

 #include <boost/predef/library/c/gnu.h>
 #include <boost/predef/library/c/uc.h>
--- a/include/boost/predef/library/c/_prefix.h
+++ b/include/boost/predef/library/c/_prefix.h
@@ -0,0 +1,13 @@
+/*
+Copyright Redshift Software, Inc. 2008-2013
+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_LIBRARY_C__PREFIX_H
+#define BOOST_PREDEF_LIBRARY_C__PREFIX_H
+
+#include <boost/predef/detail/_cassert.h>
+
+#endif
--- a/include/boost/predef/library/c/gnu.h
+++ b/include/boost/predef/library/c/gnu.h
@@ -11,6 +11,8 @@ http://www.boost.org/LICENSE_1_0.txt)
 #include <boost/predef/version_number.h>
 #include <boost/predef/make.h>

+#include <boost/predef/library/c/_prefix.h>
+
 #if defined(__STDC__)
 #include <stddef.h>
 #elif defined(__cplusplus)
--- a/include/boost/predef/library/c/uc.h
+++ b/include/boost/predef/library/c/uc.h
@@ -8,6 +8,8 @@ http://www.boost.org/LICENSE_1_0.txt)
 #ifndef BOOST_PREDEF_LIBRARY_C_UC_H
 #define BOOST_PREDEF_LIBRARY_C_UC_H

+#include <boost/predef/library/c/_prefix.h>
+
 #include <boost/predef/version_number.h>
 #include <boost/predef/make.h>

--- a/include/boost/predef/library/c/vms.h
+++ b/include/boost/predef/library/c/vms.h
@@ -8,6 +8,8 @@ http://www.boost.org/LICENSE_1_0.txt)
 #ifndef BOOST_PREDEF_LIBRARY_C_VMS_H
 #define BOOST_PREDEF_LIBRARY_C_VMS_H

+#include <boost/predef/library/c/_prefix.h>
+
 #include <boost/predef/version_number.h>
 #include <boost/predef/make.h>

--- a/include/boost/predef/library/c/zos.h
+++ b/include/boost/predef/library/c/zos.h
@@ -8,6 +8,8 @@ http://www.boost.org/LICENSE_1_0.txt)
 #ifndef BOOST_PREDEF_LIBRARY_C_ZOS_H
 #define BOOST_PREDEF_LIBRARY_C_ZOS_H

+#include <boost/predef/library/c/_prefix.h>
+
 #include <boost/predef/version_number.h>
 #include <boost/predef/make.h>

--- a/include/boost/predef/library/std.h
+++ b/include/boost/predef/library/std.h
@@ -1,5 +1,5 @@
 /*
-Copyright Redshift Software, Inc. 2008-2012
+Copyright Redshift Software, Inc. 2008-2013
 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)
@@ -7,41 +7,17 @@ http://www.boost.org/LICENSE_1_0.txt)
 #ifndef BOOST_PREDEF_LIBRARY_STD_H
 #define BOOST_PREDEF_LIBRARY_STD_H

-/*
-We need to include an STD header to gives us the context
-of which library we are using. The "smallest" code-wise header
-seems to be <exception>. Boost uses <utility> but as far
-as I can tell (RR) it's not a standalone header in most
-implementations. Using <exception> also has the benefit of
-being available in EC++, so we get a chance to make this work
-for embedded users. And since it's not a header impacted by TR1
-there's no magic needed for inclusion in the face of the
-Boost.TR1 library.
-*/
-#include <boost/predef/detail/_exception.h>
+#include <boost/predef/library/std/_prefix.h>

-/*
-STLPort library; this _must_ come first, otherwise since
-STLport typically sits on top of some other library, we
-can end up detecting that first rather than STLport:
-*/
-#include <boost/predef/library/std/stlport.h>
-
-/*
-The rest in alpha order, except for Dinkumware.
-*/
 #include <boost/predef/library/std/cxx.h>
+#include <boost/predef/library/std/dinkumware.h>
 #include <boost/predef/library/std/libcomo.h>
 #include <boost/predef/library/std/modena.h>
 #include <boost/predef/library/std/msl.h>
 #include <boost/predef/library/std/roguewave.h>
 #include <boost/predef/library/std/sgi.h>
 #include <boost/predef/library/std/stdcpp3.h>
+#include <boost/predef/library/std/stlport.h>
 #include <boost/predef/library/std/vacpp.h>

-/*
-Dinkumware Library (this has to appear after any possible replacement libraries):
-*/
-#include <boost/predef/library/std/dinkumware.h>
-
 #endif
--- a/include/boost/predef/library/std/_prefix.h
+++ b/include/boost/predef/library/std/_prefix.h
@@ -0,0 +1,23 @@
+/*
+Copyright Redshift Software, Inc. 2008-2013
+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_LIBRARY_STD__PREFIX_H
+#define BOOST_PREDEF_LIBRARY_STD__PREFIX_H
+
+/*
+We need to include an STD header to gives us the context
+of which library we are using. The "smallest" code-wise header
+seems to be <exception>. Boost uses <utility> but as far
+as I can tell (RR) it's not a stand-alone header in most
+implementations. Using <exception> also has the benefit of
+being available in EC++, so we get a chance to make this work
+for embedded users. And since it's not a header impacted by TR1
+there's no magic needed for inclusion in the face of the
+Boost.TR1 library.
+*/
+#include <boost/predef/detail/_exception.h>
+
+#endif
--- a/include/boost/predef/library/std/cxx.h
+++ b/include/boost/predef/library/std/cxx.h
@@ -8,6 +8,8 @@ http://www.boost.org/LICENSE_1_0.txt)
 #ifndef BOOST_PREDEF_LIBRARY_STD_CXX_H
 #define BOOST_PREDEF_LIBRARY_STD_CXX_H

+#include <boost/predef/library/std/_prefix.h>
+
 #include <boost/predef/version_number.h>
 #include <boost/predef/make.h>

--- a/include/boost/predef/library/std/dinkumware.h
+++ b/include/boost/predef/library/std/dinkumware.h
@@ -8,6 +8,8 @@ http://www.boost.org/LICENSE_1_0.txt)
 #ifndef BOOST_PREDEF_LIBRARY_STD_DINKUMWARE_H
 #define BOOST_PREDEF_LIBRARY_STD_DINKUMWARE_H

+#include <boost/predef/library/std/_prefix.h>
+
 #include <boost/predef/version_number.h>
 #include <boost/predef/make.h>

--- a/include/boost/predef/library/std/libcomo.h
+++ b/include/boost/predef/library/std/libcomo.h
@@ -8,6 +8,8 @@ http://www.boost.org/LICENSE_1_0.txt)
 #ifndef BOOST_PREDEF_LIBRARY_STD_LIBCOMO_H
 #define BOOST_PREDEF_LIBRARY_STD_LIBCOMO_H

+#include <boost/predef/library/std/_prefix.h>
+
 #include <boost/predef/version_number.h>
 #include <boost/predef/make.h>

--- a/include/boost/predef/library/std/modena.h
+++ b/include/boost/predef/library/std/modena.h
@@ -8,6 +8,8 @@ http://www.boost.org/LICENSE_1_0.txt)
 #ifndef BOOST_PREDEF_LIBRARY_STD_MODENA_H
 #define BOOST_PREDEF_LIBRARY_STD_MODENA_H

+#include <boost/predef/library/std/_prefix.h>
+
 #include <boost/predef/version_number.h>
 #include <boost/predef/make.h>

--- a/include/boost/predef/library/std/msl.h
+++ b/include/boost/predef/library/std/msl.h
@@ -8,6 +8,8 @@ http://www.boost.org/LICENSE_1_0.txt)
 #ifndef BOOST_PREDEF_LIBRARY_STD_MSL_H
 #define BOOST_PREDEF_LIBRARY_STD_MSL_H

+#include <boost/predef/library/std/_prefix.h>
+
 #include <boost/predef/version_number.h>
 #include <boost/predef/make.h>

--- a/include/boost/predef/library/std/roguewave.h
+++ b/include/boost/predef/library/std/roguewave.h
@@ -8,6 +8,8 @@ http://www.boost.org/LICENSE_1_0.txt)
 #ifndef BOOST_PREDEF_LIBRARY_STD_ROGUEWAVE_H
 #define BOOST_PREDEF_LIBRARY_STD_ROGUEWAVE_H

+#include <boost/predef/library/std/_prefix.h>
+
 #include <boost/predef/version_number.h>
 #include <boost/predef/make.h>

--- a/include/boost/predef/library/std/sgi.h
+++ b/include/boost/predef/library/std/sgi.h
@@ -8,6 +8,8 @@ http://www.boost.org/LICENSE_1_0.txt)
 #ifndef BOOST_PREDEF_LIBRARY_STD_SGI_H
 #define BOOST_PREDEF_LIBRARY_STD_SGI_H

+#include <boost/predef/library/std/_prefix.h>
+
 #include <boost/predef/version_number.h>
 #include <boost/predef/make.h>

--- a/include/boost/predef/library/std/stdcpp3.h
+++ b/include/boost/predef/library/std/stdcpp3.h
@@ -8,6 +8,8 @@ http://www.boost.org/LICENSE_1_0.txt)
 #ifndef BOOST_PREDEF_LIBRARY_STD_STDCPP3_H
 #define BOOST_PREDEF_LIBRARY_STD_STDCPP3_H

+#include <boost/predef/library/std/_prefix.h>
+
 #include <boost/predef/version_number.h>
 #include <boost/predef/make.h>

--- a/include/boost/predef/library/std/stlport.h
+++ b/include/boost/predef/library/std/stlport.h
@@ -8,6 +8,8 @@ http://www.boost.org/LICENSE_1_0.txt)
 #ifndef BOOST_PREDEF_LIBRARY_STD_STLPORT_H
 #define BOOST_PREDEF_LIBRARY_STD_STLPORT_H

+#include <boost/predef/library/std/_prefix.h>
+
 #include <boost/predef/version_number.h>
 #include <boost/predef/make.h>

--- a/include/boost/predef/library/std/vacpp.h
+++ b/include/boost/predef/library/std/vacpp.h
@@ -8,6 +8,8 @@ http://www.boost.org/LICENSE_1_0.txt)
 #ifndef BOOST_PREDEF_LIBRARY_STD_VACPP_H
 #define BOOST_PREDEF_LIBRARY_STD_VACPP_H

+#include <boost/predef/library/std/_prefix.h>
+
 #include <boost/predef/version_number.h>
 #include <boost/predef/make.h>