Checking if a Workflow is Running on an Item / SPWorkflowState

I needed to write some code that checked whether or not a workflow was running on a SPListItem. At first I came up with the following:

SPListItem item = ...;
foreach (SPWorkflow wf in item.Workflows)
{
    if (wf.InternalState == SPWorkflowState.Running)
    {
        // do whatever you want . . .
    }
}

The problem with this is that a workflow instance can have many states represented as a bitwise AND of all current states. The SPWorkflowState enumeration has the following values:

None	0	000000000000
Locked	1	000000000001
Running	2	000000000010
Completed	4	000000000100
Cancelled	8	000000001000
Expiring	16	000000010000
Expired	32	000000100000
Faulting	64	000001000000
Terminated	128	000010000000
Suspended	256	000100000000
Orphaned	512	001000000000
HasNewEvents	1024	010000000000
NotStarted	2048	100000000000
All	4095	111111111111

e.g. if a workflow instance was Running and Locked (not sure if this is an actual possible combination, but it serves as an example !) then the workflow's internal state would have a value of 3 representing the values of the Running AND Locked states.

To see if a workflow instance is running or not you need to perform a bitwise AND of the workflow instance's internal state with the SPWorkflowState you're interested in. To assist with this, I used the helper method shown below:

bool WorkflowStatePresent(int wfState, int stateToCheckFor)
{
    bool statePresent = false;
    if ((wfState & stateToCheckFor) == stateToCheckFor)
        statePresent = true;
    return statePresent;
}

I then invoke this as follows:

foreach (SPWorkflow wf in item.Workflows)
{
    if (WorkflowStatePresent((int)wf.InternalState,(int)SPWorkflowState.Running)
    {
        // do whatever you want . . .
    }
}