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/*
* Copyright (C) 2018, Northwestern University and Argonne National Laboratory
* See COPYRIGHT notice in top-level directory.
*/
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
*
* This examples demonstrates how to enumerate all variable, dimension,
* and attributes in a BP file using PnetCDF.
*
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
#include <stdio.h>
#include <stdlib.h>
#include <string.h> /* strcpy() */
#include <unistd.h> /* getopt() */
#include <mpi.h>
#include "pnetcdf.h"
#include <math.h>
static int verbose;
/* This is the name of the data file we will read. */
#define FILE_NAME "../../test/adios/attributes.bp"
#define ERR {if(err!=NC_NOERR){printf("Error at %s:%d : %s\n", __FILE__,__LINE__, ncmpi_strerror(err));nerrs++;}}
static void
usage(char *argv0)
{
char *help =
"Usage: %s [-h] | [-q] filename\n"
" [-h] Print help\n"
" [-q] Quiet mode (reports when fail)\n"
" filename - input BP file name\n";
fprintf(stderr, help, argv0);
}
int main(int argc, char** argv) {
extern int optind;
char filename[256];
int i, j, rank, nprocs, err, nerrs = 0;
int ncid, natt, ndim, nudim, nvar;
int dimids[1024];
char name[NC_MAX_NAME + 1];
nc_type vtype;
MPI_Offset len;
MPI_Init(&argc, &argv);
MPI_Comm_rank(MPI_COMM_WORLD, &rank);
MPI_Comm_size(MPI_COMM_WORLD, &nprocs);
verbose = 1;
/* get command-line arguments */
while ((i = getopt(argc, argv, "hq")) != EOF)
switch(i) {
case 'q': verbose = 0;
break;
case 'h':
default: if (rank==0) usage(argv[0]);
MPI_Finalize();
return 1;
}
if (argv[optind] != NULL)
snprintf(filename, 256, "%s", argv[optind]);
else {
if (rank==0) {
printf("Error: input file is required\n");
usage(argv[0]);
}
MPI_Finalize();
return 1;
}
/* Open ADIOS BP file as if opening a netcdf file
* PnetCDF can only read BP files for now, NC_NOWRITE must be set
*/
err = ncmpi_open(MPI_COMM_WORLD, filename, NC_NOWRITE, MPI_INFO_NULL,
&ncid);
ERR
err = ncmpi_inq(ncid, &ndim, &nvar, &natt, &nudim);
ERR
if (verbose)
printf("ndim: %d, nvar: %d, natt: %d, nudim: %d\n", ndim, nvar, natt,
nudim);
for(i = 0; i < ndim; i++){
err = ncmpi_inq_dim(ncid, i, name, &len);
if (verbose)
printf("Dim %d: name = %s, length = %llu\n", i, name, len);
}
for(i = 0; i < natt; i++){
err = ncmpi_inq_attname (ncid, NC_GLOBAL, i, name);
ERR
err = ncmpi_inq_att(ncid, NC_GLOBAL, name, NULL, &len);
ERR
if (verbose)
printf("Att %d: name = %s, length = %llu\n", i, name, len);
}
for(i = 0; i < nvar; i++){
err = ncmpi_inq_var(ncid, i, name, &vtype, &ndim, NULL, &natt);
ERR
if (verbose)
printf("Var %d: name = %s, ndim = %d, natt = %d, dimmids = ", i,
name, ndim, natt);
if (ndim < 1024){
err = ncmpi_inq_var(ncid, i, name, &vtype, &ndim, dimids, &natt);
ERR
if (verbose) {
for (j=0; j<ndim; j++)
printf("%d, ", dimids[j]);
}
}
if (verbose) printf("\n");
for(j = 0; j < natt; j++){
err = ncmpi_inq_attname (ncid, i, j, name);
ERR
err = ncmpi_inq_att(ncid, i, name, NULL, &len);
ERR
if (verbose)
printf("\tAtt %d: name = %s, length = %llu\n", j, name, len);
}
}
ncmpi_close(ncid);
MPI_Finalize();
return 0;
}
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