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Using CALL_EXTERNAL with a pointer to a pointer [message #19719]

Tue, 11 April 2000 00:00

Harvey Rarback
Messages: 24
Registered: September 1998

Junior Member

Folks,

I would like to interface IDL to an existing C function in an existing VMS
shareable image. The C prototype looks like

int ext_camac_canaf (camcab16r **resultp)

where camcab16r is a structure whose definition I know. Is it possible to use
the CALL_EXTERNAL interface to access the structure members? Do I have to write
a wrapper routine in C? Use LINK_IMAGE?

Any input appreciated.
--Harvey
----
Harvey Rarback phone: (650)926-3963
Stanford Linear Accelerator Ctr fax: (650)926-4100
PO Box 4349, MS 69 home phone: (650)560-9111
Stanford, CA 94309-0210 Web: ssrl.slac.stanford.edu/~rarback
rarback@ssrl.slac.stanford.edu ESnet: 45746::RARBACK

"Always tell the truth, that way you don't have to keep track."
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Using CALL_EXTERNAL with a pointer to a pointer

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