.\" $Id: pvm_archcode.3,v 1.2 1999/01/29 17:02:26 pvmsrc Exp $
.TH ARCHCODE 3PVM "15 March, 1994" "" "PVM Version 3.4"
.SH NAME
pvm_archcode \- Returns the data representation code for a
PVM architecture name.

.SH SYNOPSIS
.nf
.ft B
C	int cod = pvm_archcode( char *arch )
.br

Fortran	call pvmfarchcode( arch, cod )
.fi

.SH PARAMETERS
.IP arch 0.8i
Character string containing the architecture name.
.br
.IP cod
Integer returning architecture code.
.SH DESCRIPTION
The routine
.I pvm_archcode
returns an integer given an architecture name.
The code returned identifies machines
with compatible binary data formats.
For example, SUN4 and RS6K have the same code,
while ALPHA has a different one
(because a few datatypes have different sizes).
This lets you know when you can get away with using \fIPvmDataRaw\fR
instead of \fIPvmDataDefault\fR
encoding to pass messages between tasks on two machines.
.PP
Naturally,
you shouldn't assume the values returned by pvm_archcode
are etched in stone;
the numbers have no intrinsic meaning except that
if two different arch names map to the same value
then they're compatible.
.PP
This routine is actually obsolete in the sense that the architecture
codes returned are already available in the \fIhi_dsig\fR field
of the pvmhostinfo structure returned by pvm_config(),
as shown in the below example.
The routine is maintained for backwards compatibility only.


.SH EXAMPLES
.nf
C:
	struct pvmhostinfo *hip;
	int i;

	pvm_config((int *)0, (int *)0, &hip);
	i = pvm_archcode(hip[0].hi_arch);

	/* or you could just do:  i = hip[0].hi_dsig;  */
.sp
Fortran:
	CALL PVMFARCHCODE( 'RS6K', k )
.fi

.SH ERRORS
On success, \fIpvm_archcode\fR returns
a positive integer data signature.

The following error conditions can be returned as well:
.IP PvmBadParam
giving an invalid architecture name.
.IP PvmNotFound
there is no host with the given architecture name in the current
virtual machine configuration.
.IP PvmSysErr
pvmd not responding.
.SH SEE ALSO
pvm_config(3PVM),
pvm_initsend(3PVM),
pvm_notify(3PVM),
pvm_tasks(3PVM),
pvm_tidtohost(3PVM)