mirror of https://github.com/ecmwf/eccodes.git
84 lines
1.8 KiB
C
84 lines
1.8 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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#include <stdio.h>
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#include <stdlib.h>
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#include "grib_api.h"
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int main(int argc, char *argv[])
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{
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grib_handle* h = NULL;
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FILE* f = NULL;
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int i = 0;
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int err = 0;
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char *mode = "file";
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for(i = 1; i < argc; i++)
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{
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if(argv[i][0] == '-')
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{
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mode = argv[i]+1;
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continue;
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}
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f = fopen(argv[i],"r");
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if(!f) {
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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(0,f,&err)) != NULL)
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{
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long width;
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long height;
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double max, min;
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double *values = NULL;
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size_t count;
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int i;
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GRIB_CHECK(grib_get_size(h,"values",&count),0);
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values = (double *)malloc(sizeof(double)*count);
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GRIB_CHECK(grib_get_long(h,"Ni",&width),0);
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GRIB_CHECK(grib_get_long(h,"Nj",&height),0);
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GRIB_CHECK(grib_get_double_array(h,"values",values,&count),0);
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max=values[0];
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min=values[0];
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for (i=1; i<count;++i)
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{
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if(values[i]>max)
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max = values[i];
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if(values[i]<min)
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min = values[i];
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}
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/* PPM header */
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printf("P5\n%ld %ld\n255\n",width,height);
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for (i=0; i<count;++i)
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{
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char c = (values[i] - min)*255 / (max - min);
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printf("%c",c);
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}
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grib_handle_delete(h);
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}
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fclose(f);
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if(err)
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{
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fprintf(stderr,"%s\n",grib_get_error_message(err));
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exit(1);
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}
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}
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return 0;
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}
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