1 files changed, 91 insertions, 0 deletions
diff --git a/comm/mailnews/db/mork/morkCell.h b/comm/mailnews/db/mork/morkCell.h
new file mode 100644
index 0000000000..5b5194ccc4
--- /dev/null
+++ b/comm/mailnews/db/mork/morkCell.h
@@ -0,0 +1,91 @@
+/* -*- 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 _MORKCELL_
+#define _MORKCELL_ 1
+
+#ifndef _MORK_
+#  include "mork.h"
+#endif
+
+// 456789_123456789_123456789_123456789_123456789_123456789_123456789_123456789
+
+#define morkDelta_kShift 8          /* 8 bit shift */
+#define morkDelta_kChangeMask 0x0FF /* low 8 bit mask */
+#define morkDelta_kColumnMask (~(mork_column)morkDelta_kChangeMask)
+#define morkDelta_Init(self, cl, ch) \
+  ((self) = ((cl) << morkDelta_kShift) | (ch))
+#define morkDelta_Change(self) ((mork_change)((self)&morkDelta_kChangeMask))
+#define morkDelta_Column(self) ((self) >> morkDelta_kShift)
+
+class morkCell {  // minimal cell format
+
+ public:
+  mork_delta mCell_Delta;  // encoding of both column and change
+  morkAtom* mCell_Atom;    // content in this cell
+
+ public:
+  morkCell() : mCell_Delta(0), mCell_Atom(0) {}
+
+  morkCell(const morkCell& c)
+      : mCell_Delta(c.mCell_Delta), mCell_Atom(c.mCell_Atom) {}
+
+  // note if ioAtom is non-nil, caller needs to call ioAtom->AddCellUse():
+  morkCell(mork_column inCol, mork_change inChange, morkAtom* ioAtom) {
+    morkDelta_Init(mCell_Delta, inCol, inChange);
+    mCell_Atom = ioAtom;
+  }
+
+  // note if ioAtom is non-nil, caller needs to call ioAtom->AddCellUse():
+  void Init(mork_column inCol, mork_change inChange, morkAtom* ioAtom) {
+    morkDelta_Init(mCell_Delta, inCol, inChange);
+    mCell_Atom = ioAtom;
+  }
+
+  mork_column GetColumn() const { return morkDelta_Column(mCell_Delta); }
+  mork_change GetChange() const { return morkDelta_Change(mCell_Delta); }
+
+  mork_bool IsCellClean() const { return GetChange() == morkChange_kNil; }
+  mork_bool IsCellDirty() const { return GetChange() != morkChange_kNil; }
+
+  void SetCellClean();  // set change to kNil
+  void SetCellDirty();  // set change to kAdd
+
+  void SetCellColumnDirty(mork_column inCol) {
+    this->SetColumnAndChange(inCol, morkChange_kAdd);
+  }
+
+  void SetCellColumnClean(mork_column inCol) {
+    this->SetColumnAndChange(inCol, morkChange_kNil);
+  }
+
+  void SetColumnAndChange(mork_column inCol, mork_change inChange) {
+    morkDelta_Init(mCell_Delta, inCol, inChange);
+  }
+
+  morkAtom* GetAtom() { return mCell_Atom; }
+
+  void 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().
+
+  void SetYarn(morkEnv* ev, const mdbYarn* inYarn, morkStore* ioStore);
+
+  void AliasYarn(morkEnv* ev, mdbYarn* outYarn) const;
+  void GetYarn(morkEnv* ev, mdbYarn* outYarn) const;
+};
+
+// 456789_123456789_123456789_123456789_123456789_123456789_123456789_123456789
+
+#endif /* _MORKCELL_ */