Irrlicht 3D Engine: irrpack.h Source File

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irrpack.h
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    00001 // Copyright (C) 2007-2012 Nikolaus Gebhardt
    00002 // This file is part of the "Irrlicht Engine".
    00003 // For conditions of distribution and use, see copyright notice in irrlicht.h
    00004
    00005 // include this file right before the data structures to be 1-aligned
    00006 // and add to each structure the PACK_STRUCT define just like this:
    00007 // struct mystruct
    00008 // {
    00009 //  ...
    00010 // } PACK_STRUCT;
    00011 // Always include the irrunpack.h file right after the last type declared
    00012 // like this, and do not put any other types with different alignment
    00013 // in between!
    00014
    00015 // byte-align structures
    00016 #if defined(_MSC_VER) || defined(__BORLANDC__) || defined (__BCPLUSPLUS__)
    00017 #   pragma warning(disable: 4103)
    00018 #   pragma pack( push, packing )
    00019 #   pragma pack( 1 )
    00020 #   define PACK_STRUCT
    00021 #elif defined( __DMC__ )
    00022 #   pragma pack( push, 1 )
    00023 #   define PACK_STRUCT
    00024 #elif defined( __GNUC__ )
    00025     // Using pragma pack might work with earlier gcc versions already, but
    00026     // it started to be necessary with gcc 4.7 on mingw unless compiled with -mno-ms-bitfields.
    00027     // And I found some hints on the web that older gcc versions on the other hand had sometimes
    00028     // trouble with pragma pack while they worked with __attribute__((packed)).
    00029 #   if (__GNUC__ > 4 ) || ((__GNUC__ == 4 ) && (__GNUC_MINOR__ >= 7))
    00030 #       pragma pack( push, packing )
    00031 #       pragma pack( 1 )
    00032 #       define PACK_STRUCT
    00033 #   else
    00034 #       define PACK_STRUCT  __attribute__((packed))
    00035     #endif
    00036 #else
    00037 #   error compiler not supported
    00038 #endif
    00039