gamedevlists-general

[GD-General] packing fun

[Daniel V. <vo...@ep...>]

Packing fun.

// both gcc 3.0 and VS.NET support the pack pragma
#pragma pack(4)

struct Alice
{
	int Integer1;
	char Char1;
};

struct Bob : Alice
{
	char Char2;
};

gcc 3.0 
sizeof(Alice)==sizeof(Bob)==8 and funnier enough, STRUCT_OFFSET(Char2) <
sizeof(Alice)

VS.NET 2003
sizeof(Alice)==8, sizeof(Bob)==12

Is anyone aware of in-detail documentation on variable packing for both gcc
and VS.NET?

Thanks,

-- Daniel, Epic Games Inc.

Re: [GD-General] packing fun

[Colin F. <cp...@ea...>]

What?  Another vote for XML?!  Yay!  J/K  ;^)

>>> Packing fun.
>>> 
[...]
>>>
>>> gcc 3.0 
>>> sizeof(Alice)==sizeof(Bob)==8 and funnier enough, STRUCT_OFFSET(Char2) <
>>> sizeof(Alice)
>>> 
>>> VS.NET 2003
>>> sizeof(Alice)==8, sizeof(Bob)==12