Union support For DllStruct

[ernesthan]

how about support for unions so that we could easly make structs like this:

typedef union _TYPEX_HEADER
{
    TYPE0_HEADER Type0Hdr;  
    TYPE1_HEADER Type1Hdr;  
    TYPE2_HEADER Type2Hdr;  
    ULONG vulConfig[64];    

}TYPEX_HEADER, *PTYPEX_HEADER;

[trancexx]

It's all the same. A line of code more or less.

Edited August 28, 2010 by trancexx

[Richard Robertson]

AutoIt doesn't have direct support for unions. They can be forged out of several dll structs or manual reading of data (like just make a byte array large enough to hold everything and read the bytes into your own format.

[ernesthan]

how ?

[trancexx]

You make e.g. raw structure in required size:

$tUNION_Raw = DllStructCreate("byte[4]")

Then depending on your needs interpret data the way you like it:

$tUNION_Dword = DllStructCreate("dword", DllStructGetPtr($tUNION_Raw))
$iDWORD = DllStructGetData($tUNION_Dword, 1)

$tUNION_Int = DllStructCreate("int", DllStructGetPtr($tUNION_Raw))
$iINT = DllStructGetData($tUNION_Int, 1)

$tUNION_Float = DllStructCreate("float", DllStructGetPtr($tUNION_Raw))
$nFLOAT = DllStructGetData($tUNION_Float, 1)

[AndyG]

An other example...

or

$unionstruct=dllstructcreate("char [16];float",dllstructgetptr($Something_in_Memory_struct))
$string=dllstructgetdata($unionstruct,1)
$float=dllstructgetdata($unionstruct,2)
msgbox(0,$String,$float)

Edited August 30, 2010 by AndyG

[Richard Robertson]

That was a very good example, trancexx.