mirror of https://github.com/ecmwf/eccodes.git
112 lines
2.0 KiB
C
112 lines
2.0 KiB
C
/*
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* Copyright 2005-2016 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 <stdio.h>
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#include <string.h>
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#include <assert.h>
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#include "grib_api.h"
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void usage(const char *prog)
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{
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fprintf(stderr,"%s: in1 [in2 ... ] out\n",prog);
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exit(1);
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}
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grib_values values[10240];
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int main(int argc, const char *argv[])
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{
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int i,j;
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FILE *in,*out;
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int e;
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grib_handle *result = NULL,*h;
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double* values = NULL;
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double *tmp = NULL;
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size_t size,count;
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if(argc < 3) usage(argv[0]);
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out = fopen(argv[argc-1],"w");
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if(!out) {
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perror(argv[argc-1]);
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exit(1);
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}
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for(i = 1; i < argc-1; i++)
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{
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in = fopen(argv[i],"r");
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if(!in) {
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perror(argv[i]);
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exit(1);
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}
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while( (h = grib_handle_new_from_file(NULL,in,&e)) != NULL )
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{
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if(result == NULL)
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{
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GRIB_CHECK(grib_get_size(h,"values",&size),argv[i]);
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values = (double*)calloc(size,sizeof(double));
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assert(values);
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tmp = (double*)calloc(size,sizeof(double));
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assert(tmp);
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result = h;
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}
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GRIB_CHECK(grib_get_size(h,"values",&count),argv[i]);
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assert(count == size);
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GRIB_CHECK(grib_get_double_array(h,"values",tmp,&count),argv[i]);
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assert(count == size);
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for(j = 0; j < count; j++)
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values[j] += tmp[j];
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if(h != result)
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grib_handle_delete(h);
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}
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GRIB_CHECK(e,argv[argc-2]);
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}
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if(result)
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{
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const void *buffer;
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GRIB_CHECK(grib_set_double_array(result,"values",values,size),argv[i]);
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GRIB_CHECK(grib_get_message(result,&buffer,&size),argv[0]);
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if(fwrite(buffer,1,size,out) != size)
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{
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perror(argv[argc-1]);
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exit(1);
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}
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grib_handle_delete(result);
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}
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if(fclose(out))
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{
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perror(argv[argc-1]);
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exit(1);
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}
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return 0;
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}
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