Barry,
The file
"${SWIG_INSTALL_PREFIX}/share/swig/{swig_version_here}/java/typemaps.i
seems to be the place where the default mappings from unsigned long long
to BigInteger are defined. I guess taking inspiration from those
typemaps and overriding them could be the way to go.
An alternative I'm thinking of would be to modify MultiDimensional.i
with something like the following (untested! just to give the idea)
added towards its top
#ifdef SWIGJAVA
// For practical reason we want Java long to be used instead of default
BigInteger. This approximation isn't much a problem since there is no
real use case to be able to address values in the range [INT64_MAX,
UINT64_MAX] for dimension sizes
typedef GInt64 MDimUInt64;
#else
typedef GUInt64 MDimUInt64;
#endif
and then replacing occurrences of GUInt64 (at least those dealing with
dimension sizes) with MDimUInt64
Not super pretty admitedly
Even
Le 21/06/2023 à 19:34, Barry DeZonia a écrit :
Thanks Even. I will try to throw that together later. But I think my
question is much more simple. I will show a small blurb below from
swig/include/java/typemaps_java.i
Code I have now follows right here. This code might conflict with
current code because I am wanting GUInt64s to go to longs and not
BigIntegers throughout the Java api. Note the code I am at a loss as
to how to write would be " Typemaps for GUInt64 * ". In other words a
C array of GUInt64's which I'd like to translate back and forth to
long[]'s. Any example code would be appreciated.
/***************************************************
* Typemaps for GUInt64
***************************************************/
%typemap(in) (GUInt64) "$1 = $input;"
%typemap(out) (GUInt64) {
/* %typemap(out) (GUInt64) */
$result = result;
}
%typemap(jni) (GUInt64) "jlong"
%typemap(jtype) (GUInt64) "long"
%typemap(jstype) (GUInt64) "long"
%typemap(javain) (GUInt64) "$javainput"
%typemap(javaout) (GUInt64) {
return $jnicall;
}
I tried a similar template for GUInt64* and made "jlong" into
"jlongArray" and "long" into "long[]" in those three places above but
I have no idea how to write the (javain) and (javaout) cases.
For the direction Java Array -> C Array, I guess taking inspiration from
DEFINE_REGULAR_ARRAY_OUT(int64_t, jlong, SetLongArrayRegion); should work
On Wed, Jun 21, 2023 at 3:35 AM Even Rouault
<[email protected]> wrote:
Barry,
it could help if you could point to a public branch in your github
fork
with your pending work
Even
Le 21/06/2023 à 07:58, Barry DeZonia a écrit :
> Hello,
>
> I am trying to work on the swig java api. I've made a lot of
progress
> and am running into one last error before my code completely
compiles.
> I am getting a swig complaint when passing a java long[] to a C/C++
> call that is expecting GUInt64*.
>
> Basically the error message is "long[] cannot be converted to
> SWIGTYPE_p_GUInt64". I've been reading and googling and I can't
figure
> out how to modify typemaps_java.i to accomplish this. I think it
is a
> simple thing but I am at a loss. Does anyone have any tips?
>
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