| 1 | |
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| 2 | module class_vtable |
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| 3 | |
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| 4 | implicit none |
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| 5 | private |
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| 6 | |
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| 7 | ! Note that all public interfaces and variables should have a |
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| 8 | ! "vtable" prefix |
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| 9 | public :: Vtable, & |
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| 10 | Vtable_record, & |
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| 11 | vtable_load_by_name, & |
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| 12 | vtable_get_fpname, & |
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| 13 | vtable_detect_gribfile_type, & |
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| 14 | Vtable_GRIBFILE_TYPE_ECMWF_GRIB1, & |
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| 15 | Vtable_GRIBFILE_TYPE_ECMWF_GRIB2, & |
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| 16 | Vtable_GRIBFILE_TYPE_ECMWF_GRIB1_2, & |
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| 17 | Vtable_GRIBFILE_TYPE_NCEP_GRIB1, & |
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| 18 | Vtable_GRIBFILE_TYPE_NCEP_GRIB2, & |
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| 19 | Vtable_GRIBFILE_TYPE_UNKNOWN |
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| 20 | |
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| 21 | |
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| 22 | integer, parameter :: VTABLE_MISSING_ENTRY = -9999 |
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| 23 | |
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| 24 | ! These are codes for designating the type of GRIB file being |
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| 25 | ! looked at |
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| 26 | integer, parameter :: Vtable_GRIBFILE_TYPE_ECMWF_GRIB1 = 1, & |
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| 27 | Vtable_GRIBFILE_TYPE_ECMWF_GRIB2 = 2, & |
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| 28 | Vtable_GRIBFILE_TYPE_ECMWF_GRIB1_2 = 3, & |
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| 29 | Vtable_GRIBFILE_TYPE_NCEP_GRIB1 = 4, & |
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| 30 | Vtable_GRIBFILE_TYPE_NCEP_GRIB2 = 5, & |
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| 31 | Vtable_GRIBFILE_TYPE_UNKNOWN = -99 |
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| 32 | |
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| 33 | ! These codes depict the origin/model of the GRIB File |
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| 34 | integer, parameter :: GRIB_CENTRE_NCEP = 7, & |
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| 35 | GRIB_CENTRE_ECMWF = 98 |
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| 36 | |
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| 37 | type Vtable_record |
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| 38 | character(len=15) :: fpname |
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| 39 | integer :: paramid |
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| 40 | integer :: indicator_of_parameter |
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| 41 | integer :: discipline |
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| 42 | integer :: category |
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| 43 | integer :: number |
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| 44 | integer :: typesurface |
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| 45 | character(len=25) :: typelevel |
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| 46 | character(len=15) :: units |
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| 47 | character(len=10) :: shortname |
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| 48 | character(len=25) :: description |
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| 49 | integer :: grib_version |
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| 50 | character(len=10) :: center |
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| 51 | end type Vtable_record |
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| 52 | |
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| 53 | type Vtable |
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| 54 | logical :: initialized=.FALSE. |
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| 55 | character(len=255) :: path_to_vtable_file |
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| 56 | integer :: num_entries = 0 |
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| 57 | type(Vtable_record), allocatable :: the_entries(:) |
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| 58 | end type Vtable |
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| 59 | |
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| 60 | contains |
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| 61 | |
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| 62 | |
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| 63 | |
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| 64 | |
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| 65 | integer function vtable_detect_gribfile_type(gribfilename) |
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| 66 | ! Given specified grib file, returns an integer code indicating its |
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| 67 | ! type to the calling program. Numeric codes are defined as integer parameters |
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| 68 | ! in this module |
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| 69 | |
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| 70 | use grib_api |
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| 71 | implicit none |
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| 72 | character(len=255), intent(in) :: gribfilename ! Full path to grib file |
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| 73 | |
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| 74 | integer :: ifile, iret, igrib, grib_centre, grib_edition |
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| 75 | logical :: end_of_file |
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| 76 | logical :: grib1_detected = .FALSE., grib2_detected = .FALSE. |
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| 77 | |
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| 78 | call grib_open_file(ifile, gribfilename, 'r', iret) |
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| 79 | |
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| 80 | ! Use first record to detect centre and and grib version of first messages. We will |
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| 81 | ! then assume that all following messages have same centre, but not necessarily same |
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| 82 | ! GRIB version |
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| 83 | call grib_new_from_file(ifile, igrib, iret) |
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| 84 | call grib_get(igrib, 'centre', grib_centre) |
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| 85 | call grib_get(igrib, 'edition', grib_edition) |
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| 86 | |
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| 87 | if (grib_edition .eq. 1) grib1_detected = .TRUE. |
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| 88 | if (grib_edition .eq. 2) grib2_detected = .TRUE. |
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| 89 | |
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| 90 | ! Now, iterate through the rest of records to determine if this is a mixed edition file |
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| 91 | end_of_file = .FALSE. |
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| 92 | do while (.NOT. end_of_file) |
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| 93 | call grib_new_from_file(ifile, igrib, iret) |
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| 94 | if (iret .eq. GRIB_END_OF_FILE) then |
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| 95 | end_of_file = .TRUE. |
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| 96 | else |
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| 97 | |
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| 98 | ! Get edition from file |
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| 99 | call grib_get(igrib, 'edition', grib_edition) |
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| 100 | if (grib_edition .eq. 1) grib1_detected = .TRUE. |
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| 101 | if (grib_edition .eq. 2) grib2_detected = .TRUE. |
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| 102 | end if |
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| 103 | end do |
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| 104 | |
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| 105 | call grib_close_file(ifile) |
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| 106 | |
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| 107 | ! Determine the gribfile type depending on centre and edition(s) |
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| 108 | |
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| 109 | if (grib_centre .eq. GRIB_CENTRE_ECMWF) then |
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| 110 | if (grib1_detected .and. grib2_detected) then |
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| 111 | vtable_detect_gribfile_type = Vtable_GRIBFILE_TYPE_ECMWF_GRIB1_2 |
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| 112 | else if (grib1_detected .and. .not. grib2_detected) then |
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| 113 | vtable_detect_gribfile_type = Vtable_GRIBFILE_TYPE_ECMWF_GRIB1 |
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| 114 | else if (.not. grib1_detected .and. grib2_detected) then |
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| 115 | vtable_detect_gribfile_type = Vtable_GRIBFILE_TYPE_ECMWF_GRIB2 |
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| 116 | else |
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| 117 | vtable_detect_gribfile_type = Vtable_GRIBFILE_TYPE_UNKNOWN |
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| 118 | endif |
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| 119 | else if (grib_centre .eq. GRIB_CENTRE_NCEP) then |
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| 120 | if (grib1_detected .and. .not. grib2_detected) then |
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| 121 | vtable_detect_gribfile_type = Vtable_GRIBFILE_TYPE_NCEP_GRIB1 |
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| 122 | else if (.not. grib1_detected .and. grib2_detected) then |
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| 123 | vtable_detect_gribfile_type = Vtable_GRIBFILE_TYPE_NCEP_GRIB2 |
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| 124 | else |
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| 125 | vtable_detect_gribfile_type = Vtable_GRIBFILE_TYPE_UNKNOWN |
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| 126 | endif |
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| 127 | else |
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| 128 | vtable_detect_gribfile_type = Vtable_GRIBFILE_TYPE_UNKNOWN |
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| 129 | endif |
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| 130 | |
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| 131 | end function vtable_detect_gribfile_type |
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| 132 | |
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| 133 | |
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| 134 | |
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| 135 | subroutine vtable_load_by_name(vtable_name, the_vtable_data) |
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| 136 | implicit none |
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| 137 | |
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| 138 | character(len=255), intent(in) :: vtable_name ! Full path to vtable file |
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| 139 | |
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| 140 | logical :: lexist |
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| 141 | integer :: ierr |
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| 142 | integer :: num_vrecs = 0 |
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| 143 | integer :: vrec_idx |
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| 144 | character(len=255) :: file_line = ' ' |
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| 145 | |
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| 146 | type(Vtable), intent(out) :: the_vtable_data ! Data structure holding the vtable |
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| 147 | |
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| 148 | type(Vtable_record) :: vrecord |
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| 149 | |
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| 150 | ! Make sure the file exists |
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| 151 | inquire(file=trim(vtable_name), exist=lexist) |
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| 152 | if (.not. lexist) then |
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| 153 | print *, 'file: ', trim(vtable_name), ' does not exist...' |
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| 154 | stop |
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| 155 | endif |
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| 156 | |
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| 157 | ! Open file |
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| 158 | open(10, file=trim(vtable_name), status='old', form='formatted', iostat=ierr) |
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| 159 | if (ierr .ne. 0) then |
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| 160 | print *, 'file: ', trim(vtable_name), ' open failed...' |
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| 161 | stop |
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| 162 | endif |
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| 163 | |
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| 164 | ! Go through the file once and count the vtable_records |
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| 165 | ! Read past headers |
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| 166 | file_line = ' ' |
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| 167 | do while(file_line(1:1) .ne. '-') |
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| 168 | read(10, '(A255)', iostat=ierr) file_line |
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| 169 | enddo |
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| 170 | |
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| 171 | ! Now we are at the '----------' line - process everything between |
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| 172 | ! here and the next '----------' line. In this case, we just want to |
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| 173 | ! count |
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| 174 | file_line = ' ' |
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| 175 | num_vrecs = 0 |
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| 176 | do while(file_line(1:1) .ne. '-') |
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| 177 | read(10, '(A255)', iostat=ierr) file_line |
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| 178 | !print *, file_line |
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| 179 | num_vrecs = num_vrecs + 1 |
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| 180 | enddo |
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| 181 | num_vrecs = num_vrecs - 1 |
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| 182 | |
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| 183 | !print *, 'num_vrecs: ', num_vrecs |
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| 184 | |
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| 185 | ! Rewind |
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| 186 | rewind(unit=10) |
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| 187 | |
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| 188 | ! Allocate array for storing the vtable records, and store |
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| 189 | ! num_entries |
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| 190 | !print *, 'Ready to allocate the_vtable_data' |
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| 191 | allocate(the_vtable_data%the_entries(num_vrecs)) |
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| 192 | !print *, 'Allocated the_vtable_data' |
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| 193 | the_vtable_data%num_entries = num_vrecs |
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| 194 | |
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| 195 | ! Read, parse and store the vtable records |
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| 196 | ! Read past headers |
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| 197 | file_line = ' ' |
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| 198 | do while(file_line(1:1) .ne. '-') |
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| 199 | read(10, '(A255)', iostat=ierr) file_line |
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| 200 | !print *, file_line |
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| 201 | enddo |
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| 202 | |
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| 203 | ! Now we are at the '----------' line - process everything between |
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| 204 | ! here and the next '----------' line. In this case, we just want to |
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| 205 | ! count |
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| 206 | file_line = ' ' |
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| 207 | vrec_idx = 0 |
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| 208 | do while(file_line(1:1) .ne. '-') |
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| 209 | read(10, '(A255)', iostat=ierr) file_line |
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| 210 | if (file_line(1:1) .ne. '-') then |
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| 211 | ! PROCESS THE LINE |
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| 212 | vrec_idx = vrec_idx + 1 |
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| 213 | |
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| 214 | ! Parse the line and put it in the vtable structure |
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| 215 | the_vtable_data%the_entries(vrec_idx) = vtable_parse_record(file_line) |
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| 216 | |
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| 217 | !print *, the_vtable_data%the_entries(vrec_idx) |
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| 218 | !print *, file_line |
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| 219 | !print *, 'hello' |
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| 220 | endif |
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| 221 | enddo |
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| 222 | num_vrecs = num_vrecs - 1 |
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| 223 | |
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| 224 | |
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| 225 | ! Close the file |
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| 226 | close(unit=10) |
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| 227 | |
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| 228 | the_vtable_data%initialized = .TRUE. |
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| 229 | |
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| 230 | !print *, the_vtable_data%the_entries(1) |
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| 231 | end subroutine vtable_load_by_name |
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| 232 | |
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| 233 | |
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| 234 | |
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| 235 | |
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| 236 | type(Vtable_record) function vtable_parse_record(vtable_line) |
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| 237 | |
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| 238 | |
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| 239 | !!! Using a vtable line as input argument, parses into a Vtable_record, and returns that |
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| 240 | !!! record |
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| 241 | implicit none |
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| 242 | character(LEN=255), intent(in) :: vtable_line |
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| 243 | |
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| 244 | !!! This is a sample of what a Vtable line will look like |
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| 245 | !!! THIS NEEDS TO BE MODIFIED FOR NEW STRUCTURE (23 Nov 2015) |
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| 246 | !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! |
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| 247 | !vtable_line = 'UU | 131 | 0 | 2 | 2 | & |
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| 248 | ! & 105 | hybrid | ms**-1 | u & |
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| 249 | ! & | u wind | 2 |' |
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| 250 | !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! |
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| 251 | |
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| 252 | |
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| 253 | ! Storage for Vtable record tokens |
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| 254 | character(25) :: token_fpname='',& |
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| 255 | token_paramid='', & |
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| 256 | token_indofparam='', & |
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| 257 | token_discipline='', & |
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| 258 | token_category='', & |
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| 259 | token_number='', & |
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| 260 | token_typesurface='', & |
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| 261 | token_typelevel='', & |
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| 262 | token_units='', & |
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| 263 | token_shortname='', & |
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| 264 | token_description='', & |
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| 265 | token_gribversion='', & |
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| 266 | token_center='' |
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| 267 | |
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| 268 | ! These indices mark the locations of the '|' delimiter in a Vtable record |
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| 269 | integer :: delim_fpname_idx, & |
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| 270 | delim_paramid_idx, & |
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| 271 | delim_indofparam_idx, & |
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| 272 | delim_disc_idx, & |
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| 273 | delim_cat_idx, & |
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| 274 | delim_numb_idx, & |
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| 275 | delim_typesurf_idx, & |
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| 276 | delim_typelevel_idx, & |
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| 277 | delim_units_idx, & |
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| 278 | delim_shortname_idx, & |
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| 279 | delim_descr_idx, & |
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| 280 | delim_version_idx, & |
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| 281 | delim_center_idx |
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| 282 | |
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| 283 | type(Vtable_record) :: vrecord |
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| 284 | |
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| 285 | integer :: istat ! Error indicator for some I/O routines |
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| 286 | |
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| 287 | ! Calculate the indices of each field so we can extract later |
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| 288 | delim_fpname_idx = index(vtable_line, '|') |
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| 289 | delim_paramid_idx = index(vtable_line(delim_fpname_idx+1:), '|') & |
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| 290 | + delim_fpname_idx |
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| 291 | delim_indofparam_idx = index(vtable_line(delim_paramid_idx+1:), '|') & |
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| 292 | + delim_paramid_idx |
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| 293 | delim_disc_idx = index(vtable_line(delim_indofparam_idx+1:), '|') & |
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| 294 | + delim_indofparam_idx |
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| 295 | delim_cat_idx = index(vtable_line(delim_disc_idx+1:), '|') & |
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| 296 | + delim_disc_idx |
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| 297 | delim_numb_idx = index(vtable_line(delim_cat_idx+1:), '|') & |
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| 298 | + delim_cat_idx |
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| 299 | delim_typesurf_idx = index(vtable_line(delim_numb_idx+1:), '|') & |
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| 300 | + delim_numb_idx |
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| 301 | delim_typelevel_idx = index(vtable_line(delim_typesurf_idx+1:), '|') & |
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| 302 | + delim_typesurf_idx |
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| 303 | delim_units_idx = index(vtable_line(delim_typelevel_idx+1:), '|') & |
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| 304 | + delim_typelevel_idx |
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| 305 | delim_shortname_idx = index(vtable_line(delim_units_idx+1:), '|') & |
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| 306 | + delim_units_idx |
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| 307 | delim_descr_idx = index(vtable_line(delim_shortname_idx+1:), '|') & |
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| 308 | + delim_shortname_idx |
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| 309 | delim_version_idx = index(vtable_line(delim_descr_idx+1:), '|') & |
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| 310 | + delim_descr_idx |
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| 311 | delim_center_idx = index(vtable_line(delim_version_idx+1:), '|') & |
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| 312 | + delim_version_idx |
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| 313 | |
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| 314 | ! Extract the tokens |
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| 315 | token_fpname = vtable_line(:delim_fpname_idx-1) |
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| 316 | token_paramid = vtable_line(delim_fpname_idx+1:delim_paramid_idx-1) |
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| 317 | token_indofparam = vtable_line(delim_paramid_idx+1:delim_indofparam_idx-1) |
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| 318 | token_discipline = vtable_line(delim_indofparam_idx+1:delim_disc_idx-1) |
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| 319 | token_category = vtable_line(delim_disc_idx+1:delim_cat_idx-1) |
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| 320 | token_number = vtable_line(delim_cat_idx+1:delim_numb_idx-1) |
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| 321 | token_typesurface = vtable_line(delim_numb_idx+1:delim_typesurf_idx-1) |
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| 322 | token_typelevel = vtable_line(delim_typesurf_idx+1:delim_typelevel_idx-1) |
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| 323 | token_units = vtable_line(delim_typelevel_idx+1:delim_units_idx-1) |
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| 324 | token_shortname = vtable_line(delim_units_idx+1:delim_shortname_idx-1) |
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| 325 | token_description = vtable_line(delim_shortname_idx+1:delim_descr_idx-1) |
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| 326 | token_gribversion = vtable_line(delim_descr_idx+1:delim_version_idx-1) |
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| 327 | token_center = vtable_line(delim_version_idx+1:delim_center_idx-1) |
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| 328 | |
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| 329 | ! Jam the data in the record for return |
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| 330 | vrecord%fpname = token_fpname |
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| 331 | |
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| 332 | read(token_paramid, *, iostat=istat) vrecord%paramid |
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| 333 | if (istat .ne. 0) vrecord%paramid = VTABLE_MISSING_ENTRY |
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| 334 | |
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| 335 | read(token_indofparam, *, iostat=istat) vrecord%indicator_of_parameter |
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| 336 | if (istat .ne. 0) vrecord%indicator_of_parameter = VTABLE_MISSING_ENTRY |
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| 337 | |
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| 338 | |
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| 339 | read(token_discipline, *, iostat=istat) vrecord%discipline |
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| 340 | if (istat .ne. 0) vrecord%discipline = VTABLE_MISSING_ENTRY |
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| 341 | |
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| 342 | read(token_category, *, iostat=istat) vrecord%category |
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| 343 | if (istat .ne. 0) vrecord%category = VTABLE_MISSING_ENTRY |
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| 344 | |
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| 345 | read(token_number, *, iostat=istat) vrecord%number |
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| 346 | if (istat .ne. 0) vrecord%number = VTABLE_MISSING_ENTRY |
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| 347 | |
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| 348 | read(token_typesurface, *, iostat=istat) vrecord%typesurface |
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| 349 | if (istat .ne. 0) vrecord%typesurface = VTABLE_MISSING_ENTRY |
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| 350 | |
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| 351 | vrecord%typelevel = token_typelevel |
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| 352 | vrecord%units = token_units |
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| 353 | vrecord%shortname = token_shortname |
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| 354 | vrecord%description = token_description |
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| 355 | |
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| 356 | read(token_gribversion, *, iostat=istat) vrecord%grib_version |
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| 357 | if (istat .ne. 0) vrecord%grib_version = VTABLE_MISSING_ENTRY |
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| 358 | |
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| 359 | vrecord%center = token_center |
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| 360 | |
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| 361 | |
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| 362 | !vrecord%fpname = 'UU' |
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| 363 | vtable_parse_record = vrecord |
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| 364 | |
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| 365 | !print *, "Hello vtable_parse_record()" |
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| 366 | !print *, vrecord |
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| 367 | end function vtable_parse_record |
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| 368 | |
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| 369 | character(len=15) function vtable_get_fpname(igrib, vtable_object) |
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| 370 | |
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| 371 | !!! Assumes that a calling routine has opened up a GRIB file and obtained the |
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| 372 | !!! grib id for a specific message. |
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| 373 | !!! Given a grib message and a Vtable, looks up the message parameters in the Vtable |
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| 374 | !!! and, if found, returns the fpname |
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| 375 | |
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| 376 | use grib_api |
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| 377 | implicit none |
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| 378 | |
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| 379 | integer, intent(in) :: igrib |
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| 380 | type(Vtable), intent(in) :: vtable_object |
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| 381 | |
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| 382 | integer :: parameter_id, category, number, discipline, edition, surface_type, & |
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| 383 | level, indicator_of_parameter |
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| 384 | character(len=10) :: center |
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| 385 | |
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| 386 | integer :: idx |
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| 387 | logical :: record_match |
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| 388 | |
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| 389 | call grib_get(igrib, 'editionNumber', edition) |
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| 390 | call grib_get(igrib, 'level', level) |
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| 391 | |
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| 392 | if (edition .eq. 1) then |
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| 393 | call grib_get(igrib, 'indicatorOfParameter', indicator_of_parameter) |
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| 394 | call grib_get(igrib, 'indicatorOfTypeOfLevel', surface_type) |
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| 395 | !print *, '(edition, indicator_of_parameter, surftype, level): ', edition, indicator_of_parameter, surface_type,& |
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| 396 | ! level |
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| 397 | else if (edition .eq. 2) then |
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| 398 | call grib_get(igrib, 'parameterNumber', number) |
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| 399 | call grib_get(igrib, 'parameterCategory', category) |
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| 400 | call grib_get(igrib, 'discipline', discipline) |
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| 401 | call grib_get(igrib, 'typeOfFirstFixedSurface', surface_type) |
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| 402 | !print *, '(edition, number, cat, disc, surftype, level): ', edition, number, & |
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| 403 | ! category, discipline, surface_type, level |
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| 404 | else |
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| 405 | print *, 'Illegal edition: ', edition |
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| 406 | stop |
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| 407 | endif |
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| 408 | |
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| 409 | ! Iterate through Vtable and look for a match |
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| 410 | vtable_get_fpname = 'None' |
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| 411 | record_match = .FALSE. |
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| 412 | idx = 1 |
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| 413 | do while (.NOT. record_match .AND. idx .LE. vtable_object%num_entries) |
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| 414 | |
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| 415 | |
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| 416 | |
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| 417 | if (edition .eq. 1) then |
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| 418 | if (vtable_object%the_entries(idx)%indicator_of_parameter .eq. indicator_of_parameter .and. & |
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| 419 | vtable_object%the_entries(idx)%typesurface .eq. surface_type) then |
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| 420 | vtable_get_fpname = vtable_object%the_entries(idx)%fpname |
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| 421 | record_match = .TRUE. |
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| 422 | end if |
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| 423 | else if (edition .eq. 2) then |
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| 424 | if (vtable_object%the_entries(idx)%discipline .eq. discipline .and. & |
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| 425 | vtable_object%the_entries(idx)%number .eq. number .and. & |
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| 426 | vtable_object%the_entries(idx)%category .eq. category .and. & |
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| 427 | vtable_object%the_entries(idx)%typesurface .eq. surface_type) then |
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| 428 | |
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| 429 | vtable_get_fpname = vtable_object%the_entries(idx)%fpname |
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| 430 | record_match = .TRUE. |
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| 431 | end if |
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| 432 | else |
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| 433 | print *, 'Illegal edition: ', edition |
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| 434 | stop |
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| 435 | endif |
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| 436 | idx = idx + 1 |
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| 437 | end do |
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| 438 | |
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| 439 | |
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| 440 | end function vtable_get_fpname |
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| 441 | |
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| 442 | |
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| 443 | |
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| 444 | end module class_vtable |
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| 445 | |
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| 446 | |
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