[vtkusers] #Defines for Big or Little Endian

[Glen Lehmann]

Hi, Mike,

Your VTK-binary-dir/vtkConfigure.h file will #define
VTK_WORDS_BIGENDIAN on a big endian machine.   Otherwise,
VTK_WORDS_BIGENDIAN is undefined on a little endian machine.

To do byte swapping, independent of the host architecture, I use
vtkByteSwap::SwapVoidRange.  Something like:

int x;

if (this->SwapBytes)
{
  vtkByteSwap::SwapVoidRange(&x, 1, 4);
}

Cheers,

Glen


On 31/08/06, Mike Jackson <imikejackson at gmail.com> wrote:
> Is there a #define some where that I can use to test if I am running
> on a big or little endian machine?
>
> Beyond that, are there already methods some where that I have not
> found that will take a value, say UIn32 and swap the bytes to whatever
> the system is? Something like:
>
> ByteSwap::swapLEToSystem( UInt32 );
>
> Thanks
>
> --
> Mike Jackson
> imikejackson _at_ gee-mail dot com
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