/// <summary> Always restore relevant info from the top of the SAVE list.
///
/// </summary>
/// <returns>
/// </returns>
private ErrorRtf PopState()
{
StackSave savedPop = (StackSave)_stack.Pop();
if (savedPop == null)
{
return(ErrorRtf.STACK_UNDERFLOW);
}
_destState = RDS.getObj(savedPop.rds);
_internalState = RIS.getObj(savedPop.ris);
_group--;
return(ErrorRtf.OK);
}
/// <summary> Save relevant info on a linked list of SAVE structures.
///
/// </summary>
/// <returns>
/// </returns>
private ErrorRtf PushState()
{
StackSave saveNew = new StackSave();
if (saveNew == null)
{
return(ErrorRtf.STACK_OVERFLOW);
}
saveNew.rds = RDS.getObj(_destState);
saveNew.ris = RIS.getObj(_internalState);
_internalState = RIS.NORM;
_stack.Push(saveNew);
_group++;
return(ErrorRtf.OK);
}
