1 files changed, 114 insertions, 0 deletions
diff --git a/db/mork/src/morkCell.cpp b/db/mork/src/morkCell.cpp
new file mode 100644
index 0000000000..c5844dd1a6
--- /dev/null
+++ b/db/mork/src/morkCell.cpp
@@ -0,0 +1,114 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-  */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef _MDB_
+#include "mdb.h"
+#endif
+
+#ifndef _MORK_
+#include "mork.h"
+#endif
+
+#ifndef _MORKNODE_
+#include "morkNode.h"
+#endif
+
+#ifndef _MORKSTORE_
+#include "morkStore.h"
+#endif
+
+#ifndef _MORKPOOL_
+#include "morkPool.h"
+#endif
+
+#ifndef _MORKENV_
+#include "morkEnv.h"
+#endif
+
+#ifndef _MORKCELL_
+#include "morkCell.h"
+#endif
+
+//3456789_123456789_123456789_123456789_123456789_123456789_123456789_123456789
+
+void
+morkCell::SetYarn(morkEnv* ev, const mdbYarn* inYarn, morkStore* ioStore)
+{
+  morkAtom* atom = ioStore->YarnToAtom(ev, inYarn, true /* create */);
+  if ( atom )
+    this->SetAtom(ev, atom, ioStore->StorePool()); // refcounts atom
+}
+
+void
+morkCell::GetYarn(morkEnv* ev, mdbYarn* outYarn) const
+{
+  MORK_USED_1(ev);
+  mCell_Atom->GetYarn(outYarn);
+}
+
+void
+morkCell::AliasYarn(morkEnv* ev, mdbYarn* outYarn) const
+{
+  MORK_USED_1(ev);
+  morkAtom::AliasYarn(mCell_Atom, outYarn);
+}
+
+void
+morkCell::SetCellClean()
+{
+  mork_column col = this->GetColumn();
+  this->SetColumnAndChange(col, morkChange_kNil);
+}
+  
+void
+morkCell::SetCellDirty()
+{
+  mork_column col = this->GetColumn();
+  this->SetColumnAndChange(col, morkChange_kAdd);
+}
+
+void
+morkCell::SetAtom(morkEnv* ev, morkAtom* ioAtom, morkPool* ioPool)
+  // SetAtom() "acquires" the new ioAtom if non-nil, by calling AddCellUse()
+  // to increase the refcount, and puts ioAtom into mCell_Atom.  If the old
+  // atom in mCell_Atom is non-nil, then it is "released" first by a call to
+  // CutCellUse(), and if the use count then becomes zero, then the old atom
+  // is deallocated by returning it to the pool ioPool.  (And this is
+  // why ioPool is a parameter to this method.)  Note that ioAtom can be nil
+  // to cause the cell to refer to nothing, and the old atom in mCell_Atom
+  // can also be nil, and all the atom refcounting is handled correctly.
+  //
+  // Note that if ioAtom was just created, it typically has a zero use count
+  // before calling SetAtom().  But use count is one higher after SetAtom().
+{
+  morkAtom* oldAtom = mCell_Atom;
+  if ( oldAtom != ioAtom ) // ioAtom is not already installed in this cell?
+  {
+    if ( oldAtom )
+    {
+      mCell_Atom = 0;
+      if ( oldAtom->CutCellUse(ev) == 0 )
+      {
+      // this was zapping atoms still in use - comment out until davidmc
+      // can figure out a better fix.
+//        if ( ioPool )
+//        {
+//          if ( oldAtom->IsBook() )
+//            ((morkBookAtom*) oldAtom)->CutBookAtomFromSpace(ev);
+            
+//          ioPool->ZapAtom(ev, oldAtom);
+//        }
+//        else
+//          ev->NilPointerError();
+      }
+    }
+    if ( ioAtom )
+      ioAtom->AddCellUse(ev);
+      
+    mCell_Atom = ioAtom;
+  }
+}
+
+//3456789_123456789_123456789_123456789_123456789_123456789_123456789_123456789