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Home/ Questions/Q 6600147
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Editorial Team
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Editorial Team
Asked: May 25, 20262026-05-25T18:35:03+00:00 2026-05-25T18:35:03+00:00

It seems that SWIG pointer-casting is broken : *(int **)&jresult = result; // shenanigans

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It seems that SWIG pointer-casting is broken:

*(int **)&jresult = result;   // shenanigans
return jresult;

It really should just be

jresult= (jlong)result; 

How can I hook into SWIG to tell it how to cast?

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  1. Editorial Team
    Editorial Team
    2026-05-25T18:35:03+00:00Added an answer on May 25, 2026 at 6:35 pm

    You could use a typemap. See doc here for more info. Probably look something like the code below.

    %typemap(out) TYPE *
    %{ 
      *($&1_ltype)&$result = (jlong)$1; 
    %} 
    
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