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! Copyright 1981-2016 ECMWF.
!
! This software is licensed under the terms of the Apache Licence
! Version 2.0 which can be obtained at http://www.apache.org/licenses/LICENSE-2.0.
!
! In applying this licence, ECMWF does not waive the privileges and immunities
! granted to it by virtue of its status as an intergovernmental organisation
! nor does it submit to any jurisdiction.
!
INTEGER FUNCTION DPATH_TABLES_INTERPOL(DPATH)
!
!---->
!**** DPATH_TABLES_INTERPOL
!
! Purpose
! -------
!
! This routine returns the directory path for interpolation tables.
! Returned path (as argument) has path separator suffixed (/).
!
!
! Interface
! ---------
!
! IRET = DPATH_TABLES_INTERPOL(DPATH)
!
!
! Input parameters
! ----------------
!
! DPATH - argument in which tables directory path is returned
!
!
! Output parameters
! -----------------
!
! DPATH_TABLES_INTERPOL - length of path string, 0 if not successful
!
!
! Method
! ------
!
! It respects this order (each overriding the previous, if set):
! - suitable default value
! - compile-time definition of INTERPOL_TABLES_PATH
! - run-time env. variable EMOSLIB_FILES
! - ... HIRLAM_LSM_PATH
! - ... MARS_LSM_PATH
!
!
! Externals
! ---------
!
! GETENV - Read environment variable
!
!
! Author
! ------
!
! P. Maciel ECMWF February 2015
!
!----<
!* Section 0. Definition of variables
IMPLICIT NONE
CHARACTER*256 DPATH
CHARACTER*256 TMPDPATH
INTEGER IDX
CHARACTER*13 ENVPATH1
CHARACTER*15 ENVPATH2
CHARACTER*13 ENVPATH3
CHARACTER*39 DEFPATH1
CHARACTER*256 DEFPATH2
PARAMETER (ENVPATH1 = 'EMOSLIB_FILES')
PARAMETER (ENVPATH2 = 'HIRLAM_LSM_PATH')
PARAMETER (ENVPATH3 = 'MARS_LSM_PATH')
PARAMETER (DEFPATH1 = '/usr/local/apps/libemos/tables/interpol')
#ifdef INTERPOL_TABLES_PATH
DATA DEFPATH2 / &
INTERPOL_TABLES_PATH &
/
#else
DATA DEFPATH2 / ' ' /
#endif
!* Section 1. initialize: reset paths and return value
100 CONTINUE
DPATH = ' '
TMPDPATH = ' '
DPATH_TABLES_INTERPOL = 0;
!* Section 2. Attempt reading env. variables, in order of priority
200 CONTINUE
CALL GETENV(ENVPATH3,TMPDPATH)
IF (INDEX(TMPDPATH,' ').EQ.1) CALL GETENV(ENVPATH2,TMPDPATH)
IF (INDEX(TMPDPATH,' ').EQ.1) CALL GETENV(ENVPATH1,TMPDPATH)
IDX = INDEX(TMPDPATH,' ') - 1
IF (IDX.GT.0) THEN
DPATH = TMPDPATH(1:IDX)
GOTO 900
END IF
!* Section 3. set default, possibly overriden by compile definition
! (definition is for base directory, so interpol/ need appending)
300 CONTINUE
DPATH = DEFPATH1
IDX = INDEX(DEFPATH2,' ') - 1
IF (IDX.GT.0) DPATH = DEFPATH2(1:IDX) // '/interpol'
!* Section 9. Append /, return path string length (otherwise zero)
900 CONTINUE
IDX = INDEX(DPATH,' ')
IF (IDX.GT.1) THEN
DPATH(IDX:IDX) = '/'
DPATH_TABLES_INTERPOL = IDX
END IF
RETURN
END
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