/* ===========================================================================
*
*                            PUBLIC DOMAIN NOTICE
*               National Center for Biotechnology Information
*
*  This software/database is a "United States Government Work" under the
*  terms of the United States Copyright Act.  It was written as part of
*  the author's official duties as a United States Government employee and
*  thus cannot be copyrighted.  This software/database is freely available
*  to the public for use. The National Library of Medicine and the U.S.
*  Government have not placed any restriction on its use or reproduction.
*
*  Although all reasonable efforts have been taken to ensure the accuracy
*  and reliability of the software and data, the NLM and the U.S.
*  Government do not and cannot warrant the performance or results that
*  may be obtained by using this software or data. The NLM and the U.S.
*  Government disclaim all warranties, express or implied, including
*  warranties of performance, merchantability or fitness for any particular
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*  Please cite the author in any work or product based on this material.
*
* ===========================================================================*/

#include <ncbi.h>
#include <dfa.h>

/*************************************************************************
 * dfa_check(dp)
 *
 *	Return dfaErrNone if the DFA pointed to by 'dp' is valid;
 *	otherwise, return the reason why it appears to be bad.
 *************************************************************************/
DFA_Error _cdecl
dfa_check(dp)
	register DFAPtr	dp;
{
	if (dp == NULL || dp->magic != DFA_MAGIC)
		return dfaerrno = dfaErrBadPtr;

	/* Any operational state outside this range should never be seen by user */
	if (dp->opstate < dfaOpstateVirgin || dp->opstate >= dfaOpstateZombie)
		return dfaerrno = dfaErrOpstate;

	return dfaErrNone;
}
