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

      SUBROUTINE CNTCRN (MXND, MXCORN, MLN, LNODES, LCORN, NCORN,
     &   NLOOP, N1, ERR)
C***********************************************************************

C  SUBROUTINE CNTCRN = COUNTS THE CURRENT DESIGNATED CORNER LENGTHS

C***********************************************************************

      DIMENSION LNODES (MLN, MXND), LCORN (MXCORN)

      LOGICAL ERR

      ERR = .FALSE.

C  COUNT THE CURRENT CORNERS STARTING AT THE I COUNTER

      NODE = N1
      NOLD = N1
      KOUNT = 0
      NCORN = 0
      KKC = 0
      KOUNTC = 0
      LASTC = 0
  100 CONTINUE
      KOUNT = KOUNT + 1
      IF (KOUNT .GT. NLOOP) THEN
         CALL MESSAGE('PROBLEM IN CNTCRN WITH UNCLOSED LOOP')
         ERR = .TRUE.
         GOTO 110
      ENDIF

C  A NEW CORNER NODE HAS BEEN FOUND

      IF (LNODES (1, NODE) .EQ. 1) THEN

C  ADD UP THE NUMBER OF NODES FROM THE LAST "NON-SIDE"

         NCORN = NCORN + 1
         IF (NCORN .LE. MXCORN) LCORN(NCORN) = NODE
         IF (NCORN .GT. 1) THEN
            LNODES (7, LASTC) = KOUNTC + 1
         ELSE
            KKC = KOUNTC + 1
         ENDIF
         LASTC = NODE
         KOUNTC = 0

C  THIS IS A SIDE - JUST CONTINUE

      ELSE
         KOUNTC = KOUNTC + 1
      ENDIF

C  CHECK FOR COMPLETION OF THE LOOP

      NODE = LNODES (3, NODE)
      IF (NODE .NE. NOLD) GOTO 100

C  GET THE FIRST CORNER'S DISTANCE FROM PREVIOUS CORNER CORRECT

      LNODES (7, LASTC) = KKC + KOUNTC

  110 CONTINUE

      RETURN

      END