Squirrel

I need to clone datatypes in script that are created on c++ side, but I get segmentation faults (the same happens with squirrel-builtin types like blob).
Even if I register a '_cloned'- metamethod, it doesn't get called if an instance is cloned.

Any help would be appreciated (pure squirrel, no sqplus).

The question is still open. I can provide a 'copy'
method, but that won't help if I clone tables.

This would work:

local image = Image("test.png")

local image2 = image.copy()

image2.blit(x, y)

while this would not:

local image3 = clone image

image3.blit(x,y) // <--crash

Therefore something like this will fail:

local a = {}

a.a <- Image("test.png")

local b = clone a

b.a.blit(20, 30) // <--crash

blobs cannot be cloned, as the implementation doesn't implement _cloned (my bad I'll fix that).

this is what cloned for the blob should look like

static SQInteger _blob__cloned(HSQUIRRELVM v)
{
 SQBlob *other = NULL;
 {
  if(SQ_FAILED(sq_getinstanceup(v,2,(SQUserPointer*)&other,(SQUserPointer)SQSTD_BLOB_TYPE_TAG))) 
   return SQ_ERROR;
 }
 SQBlob *thisone = new SQBlob(other->Len());
 memcpy(thisone->GetBuf(),other->GetBuf(),thisone->Len());
 if(SQ_FAILED(sq_setinstanceup(v,1,thisone))) {
  delete thisone;
  return sq_throwerror(v, _SC("cannot clone blob"));
 }
 sq_setreleasehook(v,1,_blob_releasehook);
 return 0;
}

I hope this helps

Alberto

 

Thanks, that really helped.
The documentation has room for improvement (you probably know that for yourself). I actually look more into the squirrel source code instead.