OpenEuphoria

Re: Rob printf problem.

• Posted by Robert Craig <rds at ATTCANADA.NET> Jan 08, 2000
• 455 views

Bernie Ryan writes:
> If a "C" or a assembler program is returning a
> minus one to Euphoria, then
> how is Euphoria going to know if the returned value
> is a -1 or 4294967295 ?

In the C case, you should declare the return type of
the C function in define_c_func() as an unsigned C type,
e.g. C_UINT, if you want 4294967295 returned, or as C_INT
if you want -1 returned.

In the machine code case, Euphoria's peek4u()
will return 4294967295 from memory,
whenever peek4s() returns -1.

The C declaration of a C function will tell you
if a signed or an unsigned value is being returned.

You will need to understand the intent of a machine
code routine when interpreting it's result.

Regards,
     Rob Craig
     Rapid Deployment Software
     http://www.RapidEuphoria.com