mirror of https://github.com/ecmwf/eccodes.git
129 lines
4.1 KiB
C
129 lines
4.1 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 "grib_api.h"
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void usage(char* prog) {
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printf("usage: %s infile\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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{
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grib_index* index=NULL;
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grib_handle* h=NULL;
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long *step,*level,*number;
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char** shortName=NULL;
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int i,j,k,l;
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size_t stepSize,levelSize,shortNameSize,numberSize;
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long ostep,olevel,onumber;
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char oshortName[200];
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size_t lenshortName=200;
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int ret=0,count=0;
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if (argc != 2) usage(argv[0]);
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printf("indexing...\n");
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index=grib_index_read(0,"out.gribidx",&ret);
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GRIB_CHECK(ret,0);
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printf("end indexing...\n");
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/* get the number of distinct values of "step" in the index */
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GRIB_CHECK(grib_index_get_size(index,"step",&stepSize),0);
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step=(long*)malloc(sizeof(long)*stepSize);
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if (!step) exit(1);
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/* get the list of distinct steps from the index */
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/* the list is in ascending order */
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GRIB_CHECK(grib_index_get_long(index,"step",step,&stepSize),0);
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printf("stepSize=%ld\n",(long)stepSize);
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for (i=0;i<stepSize;i++) printf("%ld ",step[i]);
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printf("\n");
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/*same as for "step"*/
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GRIB_CHECK(grib_index_get_size(index,"level",&levelSize),0);
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level=(long*)malloc(sizeof(long)*levelSize);
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if (!level) exit(1);
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/*same as for "step"*/
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GRIB_CHECK(grib_index_get_long(index,"level",level,&levelSize),0);
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printf("levelSize=%ld\n",(long)levelSize);
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for (i=0;i<levelSize;i++) printf("%ld ",level[i]);
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printf("\n");
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/*same as for "step"*/
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GRIB_CHECK(grib_index_get_size(index,"number",&numberSize),0);
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number=(long*)malloc(sizeof(long)*numberSize);
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if (!number) exit(1);
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/*same as for "step"*/
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GRIB_CHECK(grib_index_get_long(index,"number",number,&numberSize),0);
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printf("numberSize=%ld\n",(long)numberSize);
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for (i=0;i<numberSize;i++) printf("%ld ",number[i]);
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printf("\n");
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/*same as for "step"*/
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GRIB_CHECK(grib_index_get_size(index,"shortName",&shortNameSize),0);
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shortName=(char**)malloc(sizeof(char*)*shortNameSize);
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if (!shortName) exit(1);
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/*same as for "step"*/
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GRIB_CHECK(grib_index_get_string(index,"shortName",shortName,&shortNameSize),0);
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printf("shortNameSize=%ld\n",(long)shortNameSize);
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for (i=0;i<shortNameSize;i++) printf("%s ",shortName[i]);
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printf("\n");
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count=0;
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/* nested loops on the keys values of the index */
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/* different order of the nested loops doesn't affect performance*/
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for (i=0;i<shortNameSize;i++) {
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/* select the grib with shortName=shortName[i] */
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grib_index_select_string(index,"shortName",shortName[i]);
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for (l=0;l<levelSize;l++) {
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/* select the grib with level=level[i] */
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grib_index_select_long(index,"level",level[l]);
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for (j=0;j<numberSize;j++) {
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/* select the grib with number=number[i] */
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grib_index_select_long(index,"number",number[j]);
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for (k=0;k<stepSize;k++) {
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/* select the grib with step=step[i] */
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grib_index_select_long(index,"step",step[k]);
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/* create a new grib_handle from the index with the constraints
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imposed by the select statements. It is a loop because
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in the index there could be more than one grib with those
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constrants */
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while ((h=grib_handle_new_from_index(index,&ret))!=NULL){
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count++;
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if (ret) {printf("error: %d\n",ret); exit(ret);}
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lenshortName=200;
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grib_get_string(h,"shortName",oshortName,&lenshortName);
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grib_get_long(h,"level",&olevel);
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grib_get_long(h,"number",&onumber);
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grib_get_long(h,"step",&ostep);
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printf("shortName=%s ",oshortName);
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printf("level=%ld ",olevel);
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printf("number=%ld ",onumber);
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printf("step=%ld \n",ostep);
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grib_handle_delete(h);
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}
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if (ret!=GRIB_END_OF_INDEX) {printf("error: %s\n",grib_get_error_message(ret)); exit(ret);}
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}
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}
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}
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}
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printf(" %d messages selected\n",count);
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return 0;
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}
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