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!------ Routines for defining and obtaining info about dataset variables ------
! Replacement for fort-genvar.c
! Written by: Richard Weed, Ph.D.
! Center for Advanced Vehicular Systems
! Mississippi State University
! rweed@cavs.msstate.edu
! License (and other Lawyer Language)
! This software is released under the Apache 2.0 Open Source License. The
! full text of the License can be viewed at :
!
! http:www.apache.org/licenses/LICENSE-2.0.html
!
! The author grants to the University Corporation for Atmospheric Research
! (UCAR), Boulder, CO, USA the right to revise and extend the software
! without restriction. However, the author retains all copyrights and
! intellectual property rights explicitly stated in or implied by the
! Apache license
! Version 1.: Sept. 2005 - Initial Cray X1 version
! Version 2.: May 2006 - Updated to support g95
! Version 3.: April 2009 - Updated for netCDF 4.0.1
! Version 4.: April 2010 - Updated for netCDF 4.1.1
! Version 5.: May 2014 - Ensure return error status checked from C API calls
! Version 6.: Jan. 2016 - General code cleanup. Replaced automatic arrays
! sized with NC_MAX_DIMS with allocatable arrays.
! Change name processing to reflect change in
! addCNullChar
!-------------------------------- nf_def_var -------------------------------
Function nf_def_var(ncid, name, xtype, nvdims, vdims, varid) RESULT (status)
! Define name, datatype, number of dimensions, and dimension ids for a
! dataset variable. Returns variable id
USE netcdf_nc_interfaces
Implicit NONE
Integer, Intent(IN) :: ncid, xtype, nvdims
Integer, Intent(IN) :: vdims(*)
Integer, Intent(OUT) :: varid
Character(LEN=*), Intent(IN) :: name
Integer :: status
Integer(C_INT) :: cncid, cnvdims, cvarid, cstatus, cxtype
Character(LEN=(LEN(name)+1)) :: cname
Integer :: ie
Integer(C_INT), ALLOCATABLE :: cvdims(:)
cncid = ncid
cnvdims = nvdims
cxtype = xtype
! Check if a C NULL character was appended to name in calling routine
cname = addCNullChar(name, ie)
! Flip dimids to C order and subtract -1 to yield C ids prior
! to calling nc_def_var. Replaces C utility f2c_dimids
If (nvdims > 0) Then
ALLOCATE(cvdims(nvdims))
cvdims(1:nvdims) = vdims(nvdims:1:-1)-1
Else
ALLOCATE(cvdims(1))
cvdims(1) = 0
EndIf
cstatus = nc_def_var(cncid, cname(1:ie), cxtype, cnvdims, cvdims, &
cvarid)
If (cstatus == NC_NOERR) Then
! Add one to returned C varid to yield FORTRAN id
varid = cvarid + 1
EndIf
status = cstatus
If (ALLOCATED(cvdims)) DEALLOCATE(cvdims)
End Function nf_def_var
!-------------------------------- nf_inq_varndims --------------------------
Function nf_inq_varndims(ncid, varid, vndims) RESULT (status)
! Get variable dimension for a given varid from NetCDF dataset ncid
USE netcdf_nc_interfaces
Implicit NONE
Integer, Intent(IN) :: ncid, varid
Integer, Intent(OUT) :: vndims
Integer :: status
Integer(C_INT) :: cncid, cvarid, cvndims, cstatus
cncid = ncid
cvarid = varid - 1
cstatus = nc_inq_varndims(cncid, cvarid, cvndims)
If (cstatus == NC_NOERR) Then
vndims = cvndims
EndIf
status = cstatus
End Function nf_inq_varndims
!-------------------------------- nf_inq_var ----------------------------
Function nf_inq_var(ncid, varid, name, xtype, ndims, dimids, natts) &
RESULT (status)
! Get variable name, data type, dimension length, dimension ids, and
! number of attributes for a given varid
USE netcdf_nc_interfaces
Implicit NONE
Integer, Intent(IN) :: ncid, varid
Character(LEN=*), Intent(OUT) :: name
Integer, Intent(OUT) :: dimids(*)
Integer, Intent(OUT) :: ndims, xtype, natts
Integer :: status
Integer(C_INT) :: cncid, cstatus, cndims, cvarid, &
cnatts, cstat1
Integer(C_INT) :: cxtype
Character(LEN=NC_MAX_NAME+1) :: tmpname
Integer :: nlen
Integer(C_INT), ALLOCATABLE :: cdimids(:)
cncid = ncid
cvarid = varid - 1 ! subtract -1 to yield cvarid
nlen = LEN(name)
tmpname = REPEAT(" ", LEN(tmpname))
name = REPEAT(" ", nlen)
cndims = 0
dimids(1) = 0
xtype = 0
natts = 0
ndims = 0
cstat1 = nc_inq_varndims(cncid, cvarid, cndims)
status = cstat1
If (cndims > 0) Then
ALLOCATE(cdimids(cndims))
Else
ALLOCATE(cdimids(1))
EndIf
cdimids=0
cstatus = nc_inq_var(cncid, cvarid, tmpname, cxtype, cndims, cdimids, cnatts)
If (cstatus == NC_NOERR) Then
xtype = cxtype
natts = cnatts
ndims = cndims
! Check tmpname for a C null character and strip it and trailing blanks
name = stripCNullChar(tmpname, nlen)
! Reverse order of cdimids and add one to yield FORTRAN id numbers
! Replaces c2f_dimids C utility
If (ndims > 0) Then
dimids(1:ndims) = cdimids(ndims:1:-1)+1
EndIf
EndIf
status = cstatus
If (ALLOCATED(cdimids)) DEALLOCATE(cdimids)
End Function nf_inq_var
!-------------------------------- nf_inq_vardimid -----------------------
Function nf_inq_vardimid(ncid, varid, dimids) RESULT (status)
! Get variable dimension id for a dimension name
USE netcdf_nc_interfaces
Implicit NONE
Integer, Intent(IN) :: ncid, varid
Integer, Intent(OUT) :: dimids(*)
Integer :: status
Integer(C_INT) :: cncid, cstatus, cstat2, cndims, cvarid
Integer :: ndims
Integer(C_INT), ALLOCATABLE :: cvdimids(:)
cncid = ncid
cvarid = varid - 1 ! subtract -1 to get C id number
dimids(1) = 0
cndims = 0
ndims = 0
cstat2 = nc_inq_varndims(cncid, cvarid, cndims)
If (cndims > 0) Then
ALLOCATE(cvdimids(cndims))
Else
ALLOCATE(cvdimids(1))
EndIf
cvdimids = 0
cstatus = nc_inq_vardimid(cncid, cvarid, cvdimids)
! Reverse order of cdimids and add 1 to yield FORTRAN id numbers
! Replaces c2f_dimids C utility
If (cstatus == NC_NOERR) Then
ndims = cndims
If (ndims > 0) Then
dimids(1:ndims) = cvdimids(ndims:1:-1)+1
EndIf
Else
ndims = 0
EndIf
status = cstatus
If (ALLOCATED(cvdimids)) DEALLOCATE(cvdimids)
End Function nf_inq_vardimid
!-------------------------------- nf_inq_varid --------------------------
Function nf_inq_varid(ncid, name, varid) RESULT (status)
! Get variable id for a variable name from NetCDF dataset ncid
USE netcdf_nc_interfaces
Implicit NONE
Integer, Intent(IN) :: ncid
Character(LEN=*), Intent(IN) :: name
Integer, Intent(OUT) :: varid
Integer :: status
Integer(C_INT) :: cncid, cvarid, cstatus
Character(LEN=(LEN(name)+1)) :: cname
Integer :: ie
cncid = ncid
! Check name for a C NULL character added in calling routine
cname = addCNullChar(name, ie)
cstatus = nc_inq_varid(cncid, cname(1:ie), cvarid)
If (cstatus == NC_NOERR) Then
varid = cvarid + 1 ! add one to get Fortran id number
EndIf
status = cstatus
End Function nf_inq_varid
!-------------------------------- nf_inq_varname ------------------------
Function nf_inq_varname (ncid, varid, name) RESULT (status)
! Get variable name for a given varid from NetCDF dataset ncid
USE netcdf_nc_interfaces
Implicit NONE
Integer, Intent(IN) :: ncid, varid
Character(LEN=*), Intent(OUT) :: name
Integer :: status
Integer(C_INT) :: cncid, cvarid, cstatus
Character(LEN=NC_MAX_NAME+1) :: tmpname
Integer :: nlen
cncid = ncid
cvarid = varid - 1 ! subtract one to get C id number
nlen = LEN(name)
tmpname = REPEAT(" ", LEN(tmpname))
name = REPEAT(" ", nlen)
! Get tmpname from C interface
cstatus = nc_inq_varname(cncid, cvarid, tmpname)
! Find first C null character in tmpname if present and set end of string
If (cstatus == NC_NOERR) Then
name = stripCNullChar(tmpname, nlen)
EndIf
status = cstatus
End Function nf_inq_varname
!-------------------------------- nf_inq_vartype -------------------------
Function nf_inq_vartype(ncid, varid, xtype) RESULT(status)
! Inquire about numeric type of variable attributes for NetCDF file id ncid
USE netcdf_nc_interfaces
Implicit NONE
Integer, Intent(IN) :: ncid, varid
Integer, Intent(OUT) :: xtype
Integer :: status
Integer(C_INT) :: cncid, cvarid, cstatus
Integer(C_INT) :: cxtype
cncid = ncid
cvarid = varid - 1 ! Subtract one to get C id number
cstatus = nc_inq_vartype(cncid, cvarid, cxtype)
If (cstatus == NC_NOERR) Then
xtype = cxtype
EndIf
status = cstatus
End Function nf_inq_vartype
!-------------------------------- nf_inq_varnatts -----------------------
Function nf_inq_varnatts(ncid, varid, nvatts) RESULT(status)
! Inquire about number of variable attributes for NetCDF file id ncid
USE netcdf_nc_interfaces
Implicit NONE
Integer, Intent(IN) :: ncid, varid
Integer, Intent(OUT) :: nvatts
Integer :: status
Integer(C_INT) :: cncid, cvarid, cnvatts, cstatus
cncid = ncid
cvarid = varid - 1 ! subtract one to get C id number
cstatus = nc_inq_varnatts(cncid, cvarid, cnvatts)
If (cstatus == NC_NOERR) Then
nvatts = cnvatts
EndIf
status = cstatus
End Function nf_inq_varnatts
!-------------------------------- nf_rename_var -------------------------
Function nf_rename_var(ncid, varid, name) RESULT (status)
! Rename dimension name for a given dimension id
USE netcdf_nc_interfaces
Implicit NONE
Integer, Intent(IN) :: ncid, varid
Character(LEN=*), Intent(IN) :: name
Integer :: status
Integer(C_INT) :: cncid, cvarid, cstatus
Character(LEN=(LEN(name)+1)) :: cname
Integer :: ie
cncid = ncid
cvarid = varid - 1 ! Subtract one to get C id number
! Check name for a C NULL character added in calling routine
cname = addCNullChar(name, ie)
cstatus = nc_rename_var(cncid, cvarid, cname(1:ie))
status = cstatus
End Function nf_rename_var
!-------------------------------- nf_copy_var ---------------------------
Function nf_copy_var(ncid_in, varid, ncid_out) RESULT(status)
! Copies a given variable from dataset ncid_in to dataset ncid_out
USE netcdf_nc_interfaces
Implicit NONE
Integer, Intent(IN) :: ncid_in, varid, ncid_out
Integer :: status
Integer(C_INT) :: cncidin, cvarid, cncidout, cstatus
cncidin = ncid_in
cncidout = ncid_out
cvarid = varid - 1 ! Subtract one to get C id number
cstatus = nc_copy_var(cncidin, cvarid, cncidout)
status = cstatus
End Function nf_copy_var
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