[Liblas-commits] laszip: add compile-time endianness check from libLAS and issue ...

[liblas-commits at liblas.org]

details:   http://hg.liblas.orglaszip/rev/945149ad3303
changeset: 176:945149ad3303
user:      Howard Butler <hobu.inc at gmail.com>
date:      Tue Feb 01 08:26:54 2011 -0600
description:
add compile-time endianness check from libLAS and issue an #error when it's determined we're big-endian

diffstat:

 src/CMakeLists.txt            |    1 +
 src/bytestreamout_ostream.hpp |    1 +
 src/endian.hpp                |  105 ++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 107 insertions(+), 0 deletions(-)

diffs (131 lines):

diff -r f69d912e6576 -r 945149ad3303 src/CMakeLists.txt
--- a/src/CMakeLists.txt	Mon Jan 31 16:20:49 2011 -0600
+++ b/src/CMakeLists.txt	Tue Feb 01 08:26:54 2011 -0600
@@ -22,6 +22,7 @@
   bytestreamout.hpp
   bytestreamout_file.hpp
   bytestreamout_ostream.hpp
+  endian.hpp
   entropydecoder.hpp
   entropyencoder.hpp
   integercompressor.hpp
diff -r f69d912e6576 -r 945149ad3303 src/bytestreamout_ostream.hpp
--- a/src/bytestreamout_ostream.hpp	Mon Jan 31 16:20:49 2011 -0600
+++ b/src/bytestreamout_ostream.hpp	Tue Feb 01 08:26:54 2011 -0600
@@ -31,6 +31,7 @@
 #define BYTE_STREAM_OUT_OSTREAM_H
 
 #include "bytestreamout.hpp"
+#include "endian.hpp"
 
 #ifdef LZ_WIN32_VC6
 #include <fstream.h>
diff -r f69d912e6576 -r 945149ad3303 src/endian.hpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/endian.hpp	Tue Feb 01 08:26:54 2011 -0600
@@ -0,0 +1,105 @@
+/******************************************************************************
+ * $Id$
+ *
+ * Project:  liblas - http://liblas.org - A BSD library for LAS format data.
+ * Purpose:  Endian macros
+ * Author:   Mateusz Loskot, mateusz at loskot.net
+ *
+ * This file has been stolen from <boost/endian.hpp> and
+ * modified for libLAS purposes.
+ * 
+ * (C) Copyright Mateusz Loskot 2007, mateusz at loskot.net
+ * (C) Copyright Caleb Epstein 2005
+ * (C) Copyright John Maddock 2006
+ * 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)
+ * 
+ * Revision History
+ * 06 Feb 2006 - Initial Revision
+ * 09 Nov 2006 - fixed variant and version bits for v4 guids
+ * 13 Nov 2006 - added serialization
+ * 17 Nov 2006 - added name-based guid creation
+ * 20 Nov 2006 - add fixes for gcc (from Tim Blechmann)
+ * 07 Mar 2007 - converted to header only
+ * 20 Jan 2008 - removed dependency of Boost and modified for LASZIP (by Mateusz Loskot)
+ ******************************************************************************
+ *
+ * Copyright (c) 1997
+ * Silicon Graphics Computer Systems, Inc.
+ *
+ * Permission to use, copy, modify, distribute and sell this software
+ * and its documentation for any purpose is hereby granted without fee,
+ * provided that the above copyright notice appear in all copies and
+ * that both that copyright notice and this permission notice appear
+ * in supporting documentation.  Silicon Graphics makes no
+ * representations about the suitability of this software for any
+ * purpose.  It is provided "as is" without express or implied warranty.
+ *
+ * 
+ *
+ * Copyright notice reproduced from <boost/detail/limits.hpp>, from
+ * which this code was originally taken.
+ *
+ * Modified by Caleb Epstein to use <endian.h> with GNU libc and to
+ * defined the BOOST_ENDIAN macro.
+ ****************************************************************************/
+
+#ifndef LASZIP_DETAIL_ENDIAN_HPP_INCLUDED
+#define LASZIP_DETAIL_ENDIAN_HPP_INCLUDED
+
+// GNU libc offers the helpful header <endian.h> which defines
+// __BYTE_ORDER
+
+#if defined (__GLIBC__)
+# include <endian.h>
+# if (__BYTE_ORDER == __LITTLE_ENDIAN)
+#  define LASZIP_LITTLE_ENDIAN
+# elif (__BYTE_ORDER == __BIG_ENDIAN)
+#  define LASZIP_BIG_ENDIAN
+# elif (__BYTE_ORDER == __PDP_ENDIAN)
+#  define LASZIP_PDP_ENDIAN
+# else
+#  error Unknown machine endianness detected.
+# endif
+# define LASZIP_BYTE_ORDER __BYTE_ORDER
+#elif defined(_BIG_ENDIAN)
+# define LASZIP_BIG_ENDIAN
+# define LASZIP_BYTE_ORDER 4321
+#elif defined(_LITTLE_ENDIAN)
+# define LASZIP_LITTLE_ENDIAN
+# define LASZIP_BYTE_ORDER 1234
+
+#elif defined(_LITTLE_ENDIAN) && defined(_BIG_ENDIAN) 
+# define LASZIP_LITTLE_ENDIAN
+# define LASZIP_BYTE_ORDER 1234
+
+#elif defined(__sparc) || defined(__sparc__) \
+   || defined(_POWER) || defined(__powerpc__) \
+   || defined(__ppc__) || defined(__hpux) \
+   || defined(_MIPSEB) || defined(_POWER) \
+   || defined(__s390__)
+# define LASZIP_BIG_ENDIAN
+# define LASZIP_BYTE_ORDER 4321
+#elif defined(__i386__) || defined(__alpha__) \
+   || defined(__ia64) || defined(__ia64__) \
+   || defined(_M_IX86) || defined(_M_IA64) \
+   || defined(_M_ALPHA) || defined(__amd64) \
+   || defined(__amd64__) || defined(_M_AMD64) \
+   || defined(__x86_64) || defined(__x86_64__) \
+   || defined(_M_X64)
+
+# define LASZIP_LITTLE_ENDIAN
+# define LASZIP_BYTE_ORDER 1234
+#else
+# error The file src/endian.hpp needs to be set up for your CPU type.
+#endif
+
+
+#if defined(LASZIP_BIG_ENDIAN)
+# error LASzip is not currently big endian safe.  Please contact the authors on the liblas-devel mailing list for more information
+#endif
+
+
+#endif // LASZIP_DETAIL_ENDIAN_HPP_INCLUDED
+