Java and Arrays

Hello


SWIG will produce code like this, when using "arrays_java.i":

/* signed char[] support */
int SWIG_JavaArrayInSchar (JNIEnv *jenv, jbyte **jarr, signed char **carr,
jbyteArray input) {
 .
 .
 . 
  sz = (*jenv)->GetArrayLength(jenv, input);
  *jarr = (*jenv)->GetByteArrayElements(jenv, input, 0);
.
.
.
  for (i=0; i<sz; i++)
    (*carr)[i] = (signed char)(*jarr)[i];
  return 1;
}

you can see: it does Copy with a "for" loop.

This may suffer from Performance.

WHY does SWIG not Use the Get<PrimitiveType>ArrayRegion functions ??

Described here:
http://java.sun.com/products/jdk/1.2/docs/guide/jni/spec/functions.doc.html





Regards, 

Franz Höpfinger (Diplomand)
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