OpenEuphoria

RE: Damn Unions

• Posted by Matthew Lewis <matthewwalkerlewis at YAHOO.COM> Jul 26, 2002
• 397 views

> -----Original Message-----
> From: jordah ferguson [mailto:jorfergie03 at yahoo.com]

> Is there some one out there who can help me link this structure
> to euphoria. My lack of understanding of what a union is has led to 
> this.

A union (as you may know) means that you can have either type of data stored
there.  I think you could probably simply use the dwOemId member, since the
second half of the struct is reserved.  If this causes problems when you
have to store something, you'll have to first fetch the entire DWORD and
then add the high word to your wProcessorArchitecture member (although I
really doubt you'll have to do this).

Matt Lewis
 
> typedef struct _SYSTEM_INFO { // sinf 
> 
>     union { 
>         DWORD  dwOemId; 
>         struct { 
>             WORD wProcessorArchitecture; 
>             WORD wReserved; 
>         }; 
>     }; 
>     DWORD  dwPageSize; 
>     LPVOID lpMinimumApplicationAddress; 
>     LPVOID lpMaximumApplicationAddress; 
>     DWORD  dwActiveProcessorMask; 
>     DWORD  dwNumberOfProcessors; 
>     DWORD  dwProcessorType; 
>     DWORD  dwAllocationGranularity; 
>     WORD  wProcessorLevel; 
>     WORD  wProcessorRevision; 
> } SYSTEM_INFO; 
>