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114 lines
3.3 KiB
C
114 lines
3.3 KiB
C
/*
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Copyright 2018, UCAR/Unidata
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See COPYRIGHT file for copying and redistribution conditions.
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This is part of netCDF.
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This program tests for a bug discovered with nofill mode that failed
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only on file systems with block size in a particular range. This version
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of the test showed failure using a normal nc_create() call rather than
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a special nc__create() call to change the blksize.
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*/
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#include <config.h>
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#include <nc_tests.h>
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#include "err_macros.h"
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#include <stdio.h>
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#include <limits.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <netcdf.h>
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#define FILE_NAME "tst_nofill3.nc"
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#define TIME_LEN 1
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/* Change any of these values and the bug doesn't happen or requires a
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* larger disk block size (set with the "chunksize" parameter to
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* nc__create()) to see. Similarly, adding attributes or additional
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* variables will either make the bug go away or require a larger disk
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* block size to observe. But not just any larger disk block size; it
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* will have to be in a relatively narrow range. */
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#define LON_LEN 11
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#define LAT_LEN 11
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#define LVL_LEN 34
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int
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create_file(char *file_name, int fill_mode)
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{
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int ncid;
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int lon_dim, lat_dim, lvl_dim, time_dim;
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int time_id, zonal_wnd_id;
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int i;
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/* rank (number of dimensions) for each variable */
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# define RANK_time 1
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# define RANK_zonal_wnd 3
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/* variable shapes */
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int zonal_wnd_dims[RANK_zonal_wnd];
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size_t zonal_wnd_start[RANK_zonal_wnd];
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size_t zonal_wnd_count[RANK_zonal_wnd];
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float zonal_wnd[LON_LEN*LAT_LEN];
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int time[TIME_LEN];
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for(i = 0; i < TIME_LEN; i++) {
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time[i] = 1;
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}
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if (nc_create(file_name, NC_CLOBBER, &ncid)) ERR;
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if (nc_set_fill(ncid, fill_mode, NULL)) ERR;
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/* define dimensions */
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if (nc_def_dim(ncid, "lon", LON_LEN, &lon_dim)) ERR;
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if (nc_def_dim(ncid, "lat", LAT_LEN, &lat_dim)) ERR;
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if (nc_def_dim(ncid, "lvl", LVL_LEN, &lvl_dim)) ERR;
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if (nc_def_dim(ncid, "time", TIME_LEN, &time_dim)) ERR;
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/* define variables */
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if (nc_def_var(ncid, "time", NC_INT, RANK_time, &time_dim, &time_id)) ERR;
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zonal_wnd_dims[0] = lvl_dim;
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zonal_wnd_dims[1] = lat_dim;
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zonal_wnd_dims[2] = lon_dim;
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if (nc_def_var(ncid, "zonal_wnd", NC_FLOAT, RANK_zonal_wnd, zonal_wnd_dims, &zonal_wnd_id)) ERR;
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if (nc_enddef (ncid)) ERR;
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if (nc_put_var_int(ncid, time_id, time)) ERR;
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/* Bug exposed when last value written. */
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{
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int izw;
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i = LVL_LEN - 1;
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for(izw = 0; izw < LAT_LEN * LON_LEN; izw++) {
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zonal_wnd[izw] = 100 + i;
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}
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zonal_wnd_start[0] = i;
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zonal_wnd_start[1] = 0;
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zonal_wnd_start[2] = 0;
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zonal_wnd_count[0] = 1;
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zonal_wnd_count[1] = LAT_LEN;
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zonal_wnd_count[2] = LON_LEN;
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if (nc_put_vara_float(ncid, zonal_wnd_id, zonal_wnd_start, zonal_wnd_count, zonal_wnd)) ERR;
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}
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if (nc_close(ncid)) ERR;
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return 0;
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}
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int
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main(int argc, char **argv)
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{
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printf("\n*** Testing nofill mode.\n");
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printf("*** Create file in nofill mode using nc_create()...");
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{
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int ncid, varid;
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int data[TIME_LEN];
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if (create_file(FILE_NAME, NC_NOFILL)) ERR;
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if (nc_open(FILE_NAME, 0, &ncid)) ERR;
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if (nc_inq_varid(ncid, "time", &varid)) ERR;
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if (nc_get_var(ncid, varid, data)) ERR;
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if (data[0] != 1) ERR; /* value overwritten by zero due to NOFILL bug */
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if (nc_close(ncid)) ERR;
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}
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SUMMARIZE_ERR;
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FINAL_RESULTS;
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}
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