On Jul 18, 2008, at 8:08 AM, RWAD...@UP.COM wrote:
I'm having difficulty passing a null pointer to an array as an
argument to a C function. The Java declaration is:
voidefm111_det_enty_rop_at_loca(FacilityTypeStructure fac_type,
intin_rl_nbr, PropoStructure in_propo[], ShortByReference sop_count,
ObjectPointAndOrientationStructure sop[]);
It works fine when I use an actual array as the third argument
(PropoStructure in_propo[]), but I need to be able to test the use
case where the array pointer is null. More specifically, where the C
code says
if (in_propo == (Propo_Struct *)NULL) {...}
I tried substituting a Java null as the third argument, but that
causes a JVM crash. I didn't see anything in the forum that covers
this exact scenario, but I'm guessing one of the JNA memory or
pointer classes must be what I want. I just can't figure out how to
do it.
Define another version of the function which takes a Pointer argument;
call that with "null".
Also please file a bug report; you should be able to substitute "null"
for Structure[].
8 messages in net.java.dev.jna.usersRe: [jna-users] Passing a Null Array ...
