I''m writing a level-editor in DJGPP for my game in VC++ and have stumbled upon the next problem: The 2 compilers doesn''t store the structures the same way. Is there a way to convert the structures to the MSVC++ 6.0 format?

SiCrane

11,840

February 27, 2000 02:47 AM

Your probably running into problems with structure alignment. Try using #pragma pack(n) where n is either 1, 2, 4, 8 or 16 before your data structure. Probably one of those will get the alignment right. I don''t know the default DJGPP alignment, but I''d guess 4. MSVC++ uses a default of 8.

bosjoh

Author

122

February 27, 2000 06:51 AM

Hmmm, still doesn''t work. Here is the code:

#pragma pack(8)typedef struct{   unsigned short x __attribute__((packed));   unsigned short y __attribute__((packed));   unsigned short property1 __attribute__((packed));   unsigned short property2 __attribute__((packed));   unsigned short property3 __attribute__((packed));   unsigned short property4 __attribute__((packed));}SPECIAL;typedef struct{   SPECIAL special[32] __attribute__((packed));   char name[41] __attribute__((packed));   bool forwardevent[10] __attribute__((packed));   unsigned short forwardlayer __attribute__((packed));   unsigned short tileset[256] __attribute__((packed));   unsigned char changetotile[256] __attribute__((packed));   unsigned char tiletype[256] __attribute__((packed));   unsigned char layerid __attribute__((packed));}LAYER;#pragma pack(4)

I''ve tried pragma pack 1,2,4,8 and 16. None of them equals to VC++.