mirror of https://github.com/ecmwf/eccodes.git
107 lines
3.2 KiB
C
107 lines
3.2 KiB
C
/*
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* Copyright 2005-2013 ECMWF.
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*
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* This software is licensed under the terms of the Apache Licence Version 2.0
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* which can be obtained at http://www.apache.org/licenses/LICENSE-2.0.
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*
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* In applying this licence, ECMWF does not waive the privileges and immunities granted to it by
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* virtue of its status as an intergovernmental organisation nor does it submit to any jurisdiction.
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*/
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/*
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* C Implementation: points
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "grib_api_internal.h"
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void usage(char* prog) {
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printf("Usage: %s latlon_file grib_orography grib_file grib_file ...\n",prog);
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exit(1);
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}
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int main(int argc, char** argv) {
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FILE* fin=0;
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int ret=0;
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char* fname=0;
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float lat,lon;
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double *vlat,*vlon;
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int npoints=0,i=0,n=0;
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grib_handle* h;
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double *outlats,*outlons,*values,*lsm_values,*distances;
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size_t* indexes;
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if (argc < 2) usage(argv[0]);
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fname=argv[1];
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fin=fopen(fname,"r");
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if(!fin) { perror(fname); exit(1); }
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npoints=0;
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while (fscanf(fin,"%g %g",&lat,&lon) != EOF) npoints++;
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fclose(fin);
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vlat=(double*)malloc(npoints*sizeof(double));
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if (!vlat) {printf("unable to allocate %d bytes\n",npoints*sizeof(double));exit(1);}
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vlon=(double*)malloc(npoints*sizeof(double));
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if (!vlon) {printf("unable to allocate %d bytes\n",npoints*sizeof(double));exit(1);}
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outlats=(double*)malloc(npoints*sizeof(double));
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if (!outlats) {printf("unable to allocate %d bytes\n",npoints*sizeof(double));exit(1);}
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outlons=(double*)malloc(npoints*sizeof(double));
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if (!outlons) {printf("unable to allocate %d bytes\n",npoints*sizeof(double));exit(1);}
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values=(double*)malloc(npoints*sizeof(double));
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if (!values) {printf("unable to allocate %d bytes\n",npoints*sizeof(double));exit(1);}
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lsm_values=(double*)malloc(npoints*sizeof(double));
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if (!lsm_values) {printf("unable to allocate %d bytes\n",npoints*sizeof(double));exit(1);}
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distances=(double*)malloc(npoints*sizeof(double));
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if (!distances) {printf("unable to allocate %d bytes\n",npoints*sizeof(double));exit(1);}
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indexes=(size_t*)malloc(npoints*sizeof(double));
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if (!indexes) {printf("unable to allocate %d bytes\n",npoints*sizeof(double));exit(1);}
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fname=argv[1];
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fin=fopen(fname,"r");
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if(!fin) { perror(fname); exit(1); }
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i=0;
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while (fscanf(fin,"%g %g",&lat,&lon) != EOF) {vlat[i]=lat; vlon[i]=lon>0 ? lon : lon+360; i++;}
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fclose(fin);
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fname=argv[2];
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fin=fopen(fname,"r");
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if(!fin) { perror(fname); exit(1); }
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h=grib_handle_new_from_file(0,fin,&ret);
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if (!h || ret!=GRIB_SUCCESS) {printf(" unable to create handle\n");exit(1);}
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grib_nearest_find_multiple(h,1,vlat,vlon,npoints,
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outlats,outlons,lsm_values,distances,indexes);
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grib_handle_delete(h);
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fclose(fin);
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for (n=3;n<=argc-1;n++) {
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fname=argv[n];
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fin=fopen(fname,"r");
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if(!fin) { perror(fname); exit(1); }
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while ((h=grib_handle_new_from_file(0,fin,&ret))!=NULL) {
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grib_get_double_elements(h,"values",indexes,npoints,values);
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grib_handle_delete(h);
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for (i=0;i<npoints;i++)
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printf("%g %g %g %g %g %g\n",
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vlat[i],vlon[i],
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outlats[i],outlons[i],
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lsm_values[i],values[i]);
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}
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fclose(fin);
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}
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return ret;
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}
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