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C=======================================================================
      SUBROUTINE RIXINT (INLINE, IFLD, INTYP, CFIELD, IFIELD,
     &   SELMSG, MAXSEL, NUMSEL, IXSEL, *)
C=======================================================================

C   --*** RIXINT *** (BLOT) Parse selection command
C   --   Written by Amy Gilkey - revised 05/20/88
C   --
C   --RIXINT selects the items listed in the command.  If there are no
C   --fields, all the items are selected.  If the first field is ADD, the
c   --items are added to the items already selected, otherwise only the
C   --listed items are selected.
C   --
C   --Parameters:
C   --   INLINE - IN/OUT - the parsed input line for the log file
C   --   IFLD - IN/OUT - the free-field reader index
C   --   INTYP - IN - the free-field reader field types
C   --   CFIELD - IN - the character fields
C   --   IFIELD - IN - the integer fields
C   --   SELMSG - IN - the type of item for error messages
C   --   MAXSEL - IN - the number of the maximum selected items
C   --   NUMSEL - IN/OUT - the number of selected items; set to zero
C   --      upon entry unless ADD is the first field
C   --   IXSEL - IN/OUT - the selected items
C   --   * - return statement if error before any items selected

      CHARACTER*(*) INLINE
      INTEGER INTYP(*)
      CHARACTER*(*) CFIELD(*)
      INTEGER IFIELD(*)
      CHARACTER*(*) SELMSG
      INTEGER IXSEL(*)

      LOGICAL FFEXST, FFNUMB, FFMATC
      CHARACTER*80 ERRMSG
      INTEGER IRNG(3)

      IF (.NOT. (FFEXST (IFLD, INTYP))) THEN

C      --Select all items if no fields

         NUMSEL = MAXSEL
         DO 100 I = 1, MAXSEL
            IXSEL(I) = I
  100    CONTINUE

      ELSE IF (FFMATC (IFLD, INTYP, CFIELD, 'OFF', 3)) THEN

C      --Select no items if OFF

         CALL FFADDC ('OFF', INLINE)
         NUMSEL = 0

      ELSE

C      --Reset to none selected unless ADD

         IF (FFMATC (IFLD, INTYP, CFIELD, 'ADD', 3)) THEN
            CALL FFADDC ('ADD', INLINE)
         ELSE
            IF (.NOT. FFNUMB (IFLD, INTYP)) THEN
               ERRMSG =
     &            'Expected "OFF" or "ADD" or ' // SELMSG // ' range'
               CALL PRTERR ('CMDERR', ERRMSG(:LENSTR(ERRMSG)))
               GOTO 140
            END IF
            NUMSEL = 0
         END IF

  110    CONTINUE
         IF (FFEXST (IFLD, INTYP)) THEN

C         --Scan numeric range

            CALL FFVRNG (IFLD, INTYP, CFIELD, IFIELD,
     &         SELMSG, MAXSEL, IRNG, *130)
            CALL FFADDV (IRNG, INLINE)

C         --Store the range selected

            DO 120 I = IRNG(1), IRNG(2), IRNG(3)
               IF (LOCINT (I, NUMSEL, IXSEL) .LE. 0) THEN
                  IF (NUMSEL .GE. MAXSEL) THEN
                     ERRMSG = 'Too many ' // SELMSG // 's selected'
                     CALL PRTERR ('CMDERR', ERRMSG(:LENSTR(ERRMSG)))
                     GOTO 130
                  END IF

                  NUMSEL = NUMSEL + 1
                  IXSEL(NUMSEL) = I
               END IF
  120       CONTINUE

            GOTO 110
         END IF

  130    CONTINUE
         IF (NUMSEL .EQ. 0) THEN
            ERRMSG = 'No ' // SELMSG // 's are selected'
            CALL PRTERR ('CMDWARN', ERRMSG(:LENSTR(ERRMSG)))
         END IF
      END IF

      RETURN

  140 CONTINUE
      RETURN 1
      END
