vtkEndian.h
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1 /*=========================================================================
2 
3  Program: Visualization Toolkit
4  Module: vtkEndian.h.in
5 
6  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
7  All rights reserved.
8  See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
9 
10  This software is distributed WITHOUT ANY WARRANTY; without even
11  the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
12  PURPOSE. See the above copyright notice for more information.
13 
14 =========================================================================*/
15 #ifndef vtkEndian_h
16 #define vtkEndian_h
17 
18 /* Byte order. */
19 /* All compilers that support Mac OS X define either __BIG_ENDIAN__ or
20  __LITTLE_ENDIAN__ to match the endianness of the architecture being
21  compiled for. This is not necessarily the same as the architecture of the
22  machine doing the building. In order to support Universal Binaries on
23  Mac OS X, we prefer those defines to decide the endianness.
24  On other platforms we use the result of the TRY_RUN. */
25 #if !defined(__APPLE__)
26 /* #undef VTK_WORDS_BIGENDIAN */
27 #elif defined(__BIG_ENDIAN__)
28 # define VTK_WORDS_BIGENDIAN
29 #endif
30 
31 #endif