C Copyright(C) 1999-2020 National Technology & Engineering Solutions
C of Sandia, LLC (NTESS).  Under the terms of Contract DE-NA0003525 with
C NTESS, the U.S. Government retains certain rights in this software.
C
C See packages/seacas/LICENSE for details

C=======================================================================
      SUBROUTINE DBIVTT (NDB, ISEVOK, ITMP, NELBLK, NVAREL)
C=======================================================================

C   --*** DBIVTT *** Read element variable truth table
C   --   Modified for ExodusII format 8/26/95
C   --
C   --Parameters:
C   --   NDB    - IN  - the database number
C   --   NELBLK - IN  - the number of element blocks
C   --   NVAREL - IN  - the number of element variables; <0 if end-of-file
C   --   ISEVOK - OUT - the dynamic memory array of the element block variable
C   --                  truth table;variable i,block j exists iff ISEVOK(j,i)

      INTEGER NDB
      INTEGER NELBLK, NVAREL
      LOGICAL ISEVOK(NELBLK,*)
      INTEGER ITMP(NVAREL, NELBLK)

C     Read the element block variable truth table
C       isevok - num_elem_var cycles faster
      if (nvarel .gt. 0) then
        CALL EXGVTT(NDB, NELBLK, NVAREL, ITMP, IERR)
        DO 110 I = 1, NVAREL
          DO 100 IELB = 1, NELBLK
            ISEVOK(IELB,I) = (ITMP(I,IELB) .NE. 0)
 100      CONTINUE
 110    CONTINUE
      end if
      RETURN
      END