RE: Builtins

["Christen, Duane J." <dchristen@xxxxxxxxxxxxx>]

Keith,

I generally check the MI manual for builtins when dealing with "system APIs"
but I had never thought that "language specific" APIs would also be built
in. 

Thanks for reminding me to look outside the box, I need that several times a
day...

Duane Christen


> -----Original Message-----
> From: Keith Carpenter [mailto:CarpCon@xxxxxxx]
> Sent: Thursday, September 16, 2004 9:58 AM
> To: RPG programming on the AS400 / iSeries
> Subject: Re: Builtins
> 
> 
> Duane,
> 
> The V5R3 info center has some of the information you are asking for
> http://publib.boulder.ibm.com/infocenter/iseries/v5r3/ic2924/index.htm
> 
> Look under: Programming, APIs, MI programming, Machine interface
> instructions.
> 
> ILE built-ins are a subset of MI instructions.  Of the MI instructions
> listed, the ones that are available as built-ins are 
> documented as having a
> "built-in number" along with the interface for "bound program access".
> 
> Looking up MEMCPY it describes the "bound program access" as
> 
> Built-in number for MEMCPY is 15.
> MEMCPY (
>         target_string   : address of aggregate(*)
>         source_string   : address of aggregate(*)
>         copy_length     : unsigned binary(4) value which specifies the
>                           number of bytes to copy
> ) :   space pointer(16) to the target string
> 
> 
> The interface happens to be the same as the C library version 
> of memcpy.  If
> you don't have a RPG prototype, this will work.
> 
> d memcpy          pr              *   extproc('__memcpy')
> d target                          *   value
> d source                          *   value
> d length                        10u 0 value
> 
> 
> The missing piece of information is determing the actual 
> builtin name to use
> (ie. "__memcpy").
> 
> 
> 
> Keith
> 
> 
> 
> 
> 
> 
> > Bob,
> >
> > Earlier this week, or last week, you mentioned using the builtin for
> memcpy
> > (__memcpy) rather than the C library function. I could find no
> description,
> > in the C/C++ Run-time Functions manual, of which functions 
> are builtin,
> and
> > looking through the info-center search did'nt help much 
> either. Is there a
> > list of builtins somewhere or is there a rule of thumb in 
> defining them?
> >
> >
> > Thanks
> >
> > Duane Christen
> 
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