// $Id$
//-----------------------------------------------------------------------
//       The GSI Online Offline Object Oriented (Go4) Project
//         Experiment Data Processing at EE department, GSI
//-----------------------------------------------------------------------
// Copyright (C) 2000- GSI Helmholtzzentrum fuer Schwerionenforschung GmbH
//                     Planckstr. 1, 64291 Darmstadt, Germany
// Contact:            http://go4.gsi.de
//-----------------------------------------------------------------------
// This software can be used under the license agreements as stated
// in Go4License.txt file which is part of the distribution.
//-----------------------------------------------------------------------

#ifndef S_OPC1_H
#define S_OPC1_H

#include "typedefs.h"

#if MBS_ENDIAN == 1

struct s_opc1 {                         /* ++ byte1 (LSB) ++ */
      char          h_flt_len;          /* ++ byte4 (MSB) ++ length of filter*/
      char          h_next_fltblk;      /* ++ byte3 ++  next filter blk      */
      char          h_fltspec;          /* ++ byte2  filter specification */
      /* +++ 25-Jan-1994 reversed bit sequence +++ */
      unsigned      b1_lnkf2 :1;        /* lnk different flts blks   */
      unsigned      b1_lnkf1 :1;        /* lnk filters: and:1 or:0   */
      unsigned      b3_opc   :3;        /* opcode                    */
      unsigned      b1_selwrt:1;        /* select write of evt/sev          */
      unsigned      b1_selflt:1;        /* select event/subevent filter */
      unsigned      b1_evtsev :1;       /* 1:event/0:subevt active for sel */
/* REM : h_next_fltblk and h_flt_len are ABSOLUTE adresses  !!! */
};


#else

/* struct for filter opcode                  */
struct s_opc1
      {                         /* ++ byte1 (LSB) ++ */
      unsigned      b1_evtsev :1;       /* 1:event/0:subevt active for sel */
      unsigned      b1_selflt:1;        /* select event/subevent filter */
      unsigned      b1_selwrt:1;        /* select write of evt/sev          */
      unsigned      b3_opc   :3;        /* opcode                    */
      unsigned      b1_lnkf1 :1;        /* lnk filters: and:1 or:0   */
      unsigned      b1_lnkf2 :1;        /* lnk different flts blks   */
      char          h_fltspec;          /* ++ byte2  filter specification */
      char          h_next_fltblk;      /* ++ byte3 ++  next filter blk      */
      char          h_flt_len;          /* ++ byte4 (MSB) ++ length of filter*/
      };

/* REM : h_next_fltblk and h_flt_len are ABSOLUTE adresses  !!! */

#endif

#endif