OpenEuphoria

2. Re: About my project

• Posted by Jason Gade <jaygade at yahoo??om> May 22, 2008
• 637 views

ken mortenson wrote:
> 
> Hello,
> 
> I've decide to give Euphoria another try.  Of course I've run into a snag.
> 
> I've got a DLL that I wrote in PowerBasic to use an Access database.
> I should be able to use it with Euphoria for the same purpose.
> 
> The problem is I'm getting an 'invalid routine id' on my call and reading
> through the forum hasn't enlightened me. 
> 
> Here's the code...
> 
> atom dbSQL
> dbSQL = open_dll("dbSQL.dll")
> if (dbSQL=0) then
>     MsgAbort("Could not open dbSQL.dll")
> end if
> 
> atom rid_dbOpen
> rid_dbOpen = define_c_func(dbSQL, "dbOpen", {C_POINTER}, C_LONG)
> 
> global function dbOpen(sequence sPath)
>     atom text_ptr, nResult
>     text_ptr = allocate_string(sPath)
>     nResult = call_func(rid_dbOpen, text_ptr)	-- zero=fail
>     return nResult
> end function
> 
> -----------------------------
> rid_dbOpen has a value of 2, which seems a little odd to me unless
> part of some vector table, but I don't know the internals of Euphoria.
> 
> In any case any helpful solution that gets me moving forward again 
> would be greatly appreciated.
> 
> I'm working on a windows project.  The intent is a multi-user game.
> When I'm done I'll upload the source here.
> 
> I'm writing the code for unlimited players, but expect performance to
> be limited to a dozen or so.
> 
> Anyway, I'm stuck until I get past this hurdle.  Thanks.

You need c_func() instead of call_func(). call_func() is for Euphoria functions,
c_func() is for C functions.

http://www.rapideuphoria.com/lib_c_d.htm#c_func

Hope that helps!

--
A complex system that works is invariably found to have evolved from a simple
system that works.
--John Gall's 15th law of Systemantics.

"Premature optimization is the root of all evil in programming."
--C.A.R. Hoare

j.