[157] | 1 | ;+ |
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| 2 | ; @file_comments |
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| 3 | ; |
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| 4 | ; |
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| 5 | ; @categories |
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| 6 | ; |
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| 7 | ; |
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| 8 | ; @param FILENAME |
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| 9 | ; The file's name |
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| 10 | ; |
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| 11 | ; @keyword NODATA |
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| 12 | ; |
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| 13 | ; |
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| 14 | ; @keyword NOATTRIBUTES |
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| 15 | ; |
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| 16 | ; |
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| 17 | ; @returns |
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| 18 | ; |
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| 19 | ; |
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| 20 | ; @restrictions |
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| 21 | ; |
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| 22 | ; |
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| 23 | ; @examples |
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| 24 | ; |
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| 25 | ; |
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| 26 | ; @history |
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| 27 | ; |
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| 28 | ; |
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| 29 | ; @version |
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| 30 | ; $Id$ |
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| 31 | ; |
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| 32 | ;- |
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[67] | 33 | FUNCTION ncdf_struct,filename,nodata=nodata,noattributes=noattributes |
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| 34 | ; |
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| 35 | ; Read entire netcdf file into a structure. |
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| 36 | ; |
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| 37 | ; (Structure contains metadata; actual array contents are on heap, with |
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| 38 | ; pointers contained in the structure. Heap variables not created if |
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| 39 | ; "nodata" specified.) |
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| 40 | ; |
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| 41 | ; Use ncdf_struct_free to free heap memory. |
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| 42 | ; |
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| 43 | ; (Some data is duplicated for ease of access, in particular if there is |
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| 44 | ; a variable name matching a dimension name, then a pointer to the variable |
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| 45 | ; contents is accessible via the substructures corresponding to the dimension |
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| 46 | ; and every other variable that uses it.) |
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| 47 | ; |
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| 48 | ; Alan Iwi 27/6/02 |
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| 49 | ; |
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[114] | 50 | ; |
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| 51 | compile_opt idl2, strictarrsubs |
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| 52 | ; |
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[67] | 53 | |
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| 54 | id=ncdf_open(filename) |
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| 55 | |
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| 56 | g=ncdf_inquire(id) |
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| 57 | ndim=g.ndims |
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| 58 | nvar=g.nvars |
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| 59 | natt=g.ngatts |
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| 60 | |
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| 61 | if ndim gt 0 then begin |
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| 62 | dnames=strarr(ndim) |
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| 63 | dsizes=lonarr(ndim) |
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| 64 | for idim=0,ndim-1 do begin |
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| 65 | ncdf_diminq,id,idim,dname,dsize |
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| 66 | dnames[idim]=dname |
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| 67 | dsizes[idim]=dsize |
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| 68 | endfor |
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| 69 | endif |
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| 70 | |
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| 71 | if natt gt 0 and not keyword_set(noattributes) then begin |
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| 72 | anames=strarr(natt) |
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| 73 | for iatt=0,natt-1 do begin |
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| 74 | aname=ncdf_attname(id,/global,iatt) |
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| 75 | ainq=ncdf_attinq(id,/global,aname) |
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| 76 | ncdf_attget,id,/global,aname,aval |
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| 77 | if (ainq.datatype eq 'CHAR') then aval=string(aval) |
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| 78 | if iatt eq 0 then begin |
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| 79 | atts=create_struct(aname,aval) |
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| 80 | endif else begin |
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| 81 | atts=create_struct(atts,aname,aval) |
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| 82 | endelse |
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| 83 | anames[iatt]=aname |
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| 84 | endfor |
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| 85 | g=create_struct(g,'gatts',atts,'gattnames',anames) |
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| 86 | endif |
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| 87 | |
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| 88 | if nvar gt 0 then begin |
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| 89 | vnames=strarr(nvar) |
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| 90 | for ivar=0,nvar-1 do begin |
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| 91 | v=ncdf_varinq(id,ivar) |
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| 92 | |
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| 93 | vname=v.name |
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| 94 | vndim=v.ndims |
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| 95 | vnatt=v.natts |
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| 96 | vname=v.name |
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| 97 | |
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| 98 | if vnatt gt 0 and not keyword_set(noattributes) then begin |
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| 99 | vanames=strarr(vnatt) |
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| 100 | for iatt=0,vnatt-1 do begin |
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| 101 | aname=ncdf_attname(id,ivar,iatt) |
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| 102 | ainq=ncdf_attinq(id,ivar,aname) |
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| 103 | ncdf_attget,id,ivar,aname,aval |
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| 104 | if (ainq.datatype eq 'CHAR') then aval=string(aval) |
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| 105 | if iatt eq 0 then begin |
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| 106 | atts=create_struct(aname,aval) |
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| 107 | endif else begin |
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| 108 | atts=create_struct(atts,aname,aval) |
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| 109 | endelse |
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| 110 | vanames[iatt]=aname |
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| 111 | endfor |
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| 112 | v=create_struct(v,'atts',atts,'attnames',anames) |
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| 113 | endif |
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| 114 | |
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| 115 | vdnames=dnames[v.dim] |
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| 116 | vdsizes=dsizes[v.dim] |
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| 117 | v=create_struct(v,'dimnames',vdnames,'dimsizes',vdsizes) |
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| 118 | |
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| 119 | if not keyword_set(nodata) then begin |
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| 120 | ncdf_varget,id,ivar,vdata |
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| 121 | v=create_struct(v,'data',ptr_new(vdata), $ |
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| 122 | 'dimdata',replicate(ptr_new(),vndim)) |
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| 123 | endif |
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| 124 | |
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| 125 | if ivar eq 0 then begin |
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| 126 | vars=create_struct(vname,v) |
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| 127 | endif else begin |
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| 128 | vars=create_struct(vars,vname,v) |
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| 129 | endelse |
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| 130 | |
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| 131 | vnames[ivar]=vname |
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| 132 | endfor |
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| 133 | endif |
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| 134 | |
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| 135 | if ndim gt 0 then begin |
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| 136 | for idim=0,ndim-1 do begin |
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| 137 | dname=dnames[idim] |
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| 138 | d={name:dname,size:dsizes[idim]} |
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| 139 | |
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| 140 | if not keyword_set(nodata) and nvar gt 0 then begin |
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| 141 | matchvar=-1 |
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| 142 | for ivar=0,nvar-1 do begin |
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| 143 | if vnames[ivar] eq dname then matchvar=ivar |
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| 144 | endfor |
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| 145 | if matchvar ne -1 then $ |
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| 146 | d=create_struct(d,'data',vars.(matchvar).data) |
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| 147 | endif |
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| 148 | |
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| 149 | if idim eq 0 then begin |
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| 150 | dims=create_struct(dname,d) |
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| 151 | endif else begin |
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| 152 | dims=create_struct(dims,dname,d) |
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| 153 | endelse |
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| 154 | |
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| 155 | endfor |
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| 156 | g=create_struct(g,'dims',dims,'dimnames',dnames,'dimsizes',dsizes) |
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| 157 | endif |
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| 158 | |
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| 159 | if nvar gt 0 then begin |
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| 160 | if not keyword_set(nodata) then begin |
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| 161 | for ivar=0,nvar-1 do begin |
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| 162 | for idim=0,vars.(ivar).ndims-1 do begin |
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| 163 | vars.(ivar).dimdata[idim]=dims.(vars.(ivar).dim[idim]).data |
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| 164 | endfor |
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| 165 | endfor |
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| 166 | endif |
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| 167 | g=create_struct(g,'vars',vars,'varnames',vnames) |
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| 168 | endif |
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| 169 | |
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| 170 | |
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| 171 | ncdf_close,id |
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| 172 | |
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| 173 | return,g |
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| 174 | |
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| 175 | end |
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