mirror of https://github.com/ecmwf/eccodes.git
145 lines
4.0 KiB
C
145 lines
4.0 KiB
C
/*
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* (C) Copyright 2005- 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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#include "grib_api_internal.h"
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void usage(char* prog) {printf("usage: %s split order interpolated.grib original.grib\n",prog);exit(1);}
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int get_box(grib_handle *h,double *east,double *north,double *west,double *south) {
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int ret=0;
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long iScansNegatively,jScansPositively;
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ret=grib_get_long(h,"iScansNegatively",&iScansNegatively);
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if (ret) return ret;
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ret=grib_get_long(h,"jScansPositively",&jScansPositively);
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if (ret) return ret;
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if (iScansNegatively) {
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grib_get_double(h,"longitudeOfFirstGridPointInDegrees",west);
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grib_get_double(h,"longitudeOfLastGridPointInDegrees",east);
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} else {
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grib_get_double(h,"longitudeOfFirstGridPointInDegrees",east);
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grib_get_double(h,"longitudeOfLastGridPointInDegrees",west);
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}
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if (jScansPositively) {
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grib_get_double(h,"latitudeOfFirstGridPointInDegrees",south);
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grib_get_double(h,"latitudeOfLastGridPointInDegrees",north);
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} else {
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grib_get_double(h,"latitudeOfFirstGridPointInDegrees",north);
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grib_get_double(h,"latitudeOfLastGridPointInDegrees",south);
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}
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if (*east>*west) *east-=360;
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return ret;
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}
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int main(int argc, char* argv[]) {
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int order,count,i,j,k,l;
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FILE *f1,*f2;
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double *m1,*m2,*dm;
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int ret=0;
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long numberOfValues;
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double geast,gwest,gnorth,gsouth;
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double *east,*west,*north,*south;
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grib_handle *h1,*h2;
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grib_context *c=grib_context_get_default();
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int split=1;
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if (argc!=5) usage(argv[0]);
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split=atoi(argv[1]);
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order=atoi(argv[2]);
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f1=fopen(argv[3],"r");
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if (!f1) {
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perror(argv[3]);
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exit(1);
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}
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f2=fopen(argv[4],"r");
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if (!f2) {
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perror(argv[4]);
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exit(1);
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}
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m1=(double*)grib_context_malloc_clear(c,sizeof(double)*order*order);
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m2=(double*)grib_context_malloc_clear(c,sizeof(double)*order*order);
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dm=(double*)grib_context_malloc_clear(c,sizeof(double)*order*order);
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east=(double*)grib_context_malloc_clear(c,sizeof(double)*split);
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south=(double*)grib_context_malloc_clear(c,sizeof(double)*split);
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north=(double*)grib_context_malloc_clear(c,sizeof(double)*split);
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west=(double*)grib_context_malloc_clear(c,sizeof(double)*split);
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count=0;
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while ((h1=grib_handle_new_from_file(0,f1,&ret))!=NULL && (h2=grib_handle_new_from_file(0,f2,&ret))!=NULL) {
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get_box(h1,&geast,&gnorth,&gwest,&gsouth);
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if (split>1) {
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double inc=0;
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double d=(gwest-geast)/split;
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inc=0;
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for (i=0;i<split;i++) {
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east[i]=geast+inc;
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inc+=d;
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west[i]=geast+inc;
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}
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d=(gnorth-gsouth)/split;
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inc=0;
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for (i=0;i<split;i++) {
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south[i]=gsouth+inc;
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inc+=d;
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north[i]=gsouth+inc;
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}
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} else {
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east[0]=geast;
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north[0]=gnorth;
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south[0]=gsouth;
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west[0]=gwest;
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}
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for (k=0;k<split;k++) {
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for (l=0;l<split;l++) {
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printf("- %d - east=%.3f \twest=%.3f \tsouth=%.3f \tnorth=%.3f\n",count+1,east[k],west[k],south[l],north[l]);
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grib_moments(h1,east[k],north[l],west[k],south[l],order,m1,&numberOfValues);
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grib_moments(h2,east[k],north[l],west[k],south[l],order,m2,&numberOfValues);
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printf("numberOfValues=%ld\n",numberOfValues);
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for (i=0;i<order;i++) {
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for (j=0;j<order;j++) {
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printf(" (%d,%d) ",i,j);
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}
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}
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printf("\n");
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for (i=0;i<order*order;i++) printf("% .2e ",m1[i]);
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printf("\n");
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for (i=0;i<order*order;i++) printf("% .2e ",m2[i]);
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printf("\n");
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for (i=0;i<order*order;i++) printf("% .2e ",fabs((m1[i]-m2[i])/m2[i]));
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printf("\n\n");
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}
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}
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grib_handle_delete(h2);
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grib_handle_delete(h1);
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count++;
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}
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grib_context_free(c,m1);
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grib_context_free(c,m2);
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grib_context_free(c,dm);
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grib_context_free(c,east);
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grib_context_free(c,south);
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grib_context_free(c,north);
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grib_context_free(c,west);
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fclose(f1);
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fclose(f2);
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return 0;
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}
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