1

2

3 // ===============================================================================

4 // May be included multiple times - sets structure packing to 1

5 // for all supported compilers. #include <poppack1.h> reverts the changes.

6 //

7 // Currently this works on the following compilers:

8 // MSVC 7,8,9

9 // GCC

10 // BORLAND (complains about 'pack state changed but not reverted', but works)

11 // Clang

12 //

13 //

14 // USAGE:

15 //

16 // struct StructToBePacked {

17 // } PACK_STRUCT;

18 //

19 // ===============================================================================

20

21 #ifdef AI_PUSHPACK_IS_DEFINED

22 # error poppack1.h must be included after pushpack1.h

23 #endif

24

25 #if defined(_MSC_VER) || defined(__BORLANDC__) || defined (__BCPLUSPLUS__)

26 # pragma pack(push,1)

27 # define PACK_STRUCT

28 #elif defined( __GNUC__ ) || defined(__clang__)

29 # if !defined(HOST_MINGW)

30 # define PACK_STRUCT __attribute__((__packed__))

31 # else

32 # define PACK_STRUCT __attribute__((gcc_struct, __packed__))

33 # endif

34 #else

35 # error Compiler not supported

36 #endif

37

38 #if defined(_MSC_VER)

39 // C4103: Packing was changed after the inclusion of the header, probably missing #pragma pop

40 # pragma warning (disable : 4103)

41 #endif

42

43 #define AI_PUSHPACK_IS_DEFINED