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- Convert a C pointer to a FORTRAN pointer
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- Convert a C pointer to a FORTRAN pointer
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<H2><A NAME="SECTION0002116000000000000000"></A><A NAME="xref_cnfFptr"></A><A NAME="cnfFptr"></A>
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cnfFptr
- Convert a C pointer to a FORTRAN pointer
</H2>
<DL>
<DT><STRONG>Description:</STRONG>
<DD><DL>
<DD>Given a C pointer, this function returns the equivalent FORTRAN
pointer of type F77_POINTER_TYPE. Note that this conversion is
only performed if the C pointer has originally been registered
(using
<A HREF="node184.html#cnfRegp"><TT>cnfRegp</TT></A>)
for use from both C and FORTRAN. All pointers
to space allocated by
<A HREF="node155.html#cnfCalloc"><TT>cnfCalloc</TT></A>
and
<A HREF="node183.html#cnfMalloc"><TT>cnfMalloc</TT></A>
are
automatically registered in this way.
</DL>
<BR>
<DT><STRONG>Invocation:</STRONG>
<DD><DL>
<DD><TT> fpointer = cnfFptr( cpointer )
</TT>
</DL>
<BR>
<DT><STRONG>Arguments:</STRONG>
<DD>
<BR>
<DL>
<DT><STRONG>
void *cpointer (Given)
</STRONG>
<DD>
The C pointer.
</DL>
<BR>
<DT><STRONG>Returned Value:</STRONG>
<DD>
<BR>
<DL>
<DT><STRONG>
F77_POINTER_TYPE cnfCptr
</STRONG>
<DD>
The equivalent FORTRAN pointer value.
</DL>
<BR>
<DT><STRONG>Notes:</STRONG>
<DD><UL><LI>A value of zero will be returned if the C pointer has not
previously been registered for use from both C and FORTRAN, or
if a NULL pointer is supplied.
</UL>
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<ADDRESS>
<I>CNF and F77 Mixed Language Programming -- FORTRAN and C<BR>Starlink User Note 209<BR>P.M. Allan<BR>A.J. Chipperfield<BR>R.F. Warren-Smith<BR>19 January 2000<BR>E-mail:<A HREF="mailto:ussc@star.rl.ac.uk">ussc@star.rl.ac.uk</A></I>
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