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/*
Copyright 2018, UCAR/Unidata
See COPYRIGHT file for copying and redistribution conditions.
This program tests the fix for a large file bug in versions previous
to netCDF-4.1.2 for 32-bit platforms, writing to a variable with
more than 1 dimension and more than 2**32 values, where the write
starts after the first 2**32 elements.
Russ Rew
*/
#include <nc_tests.h>
#include "err_macros.h"
#include <netcdf.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#define FILE_NAME "tst_big_var6.nc"
/* Test with both classic and 64-bit offset files. If netcdf-4 is
* included, test with both netCDF-4 format variants also. */
#ifdef USE_NETCDF4
#define NUM_FORMATS (4)
#else
#define NUM_FORMATS (2)
#endif
#define NUMDIMS 4 /* rank of variable in tests */
#define DIM0 1
#define DIM1 2
#define DIM2 5000
#define DIM3 1000000 /* DIM2*DIM3 > 2**32 */
#define FIRST_VAL 65
#define SECOND_VAL 90
/*
* This program tests the fix for a large file bug in versions
* previous to netCDF-4.1.2 for 32-bit platforms, writing to a
* variable with more than 1 dimension and more than 2**32 values,
* where the write starts after the first 2**32 elements. The bug
* applies to record variables with more than 2**32 values per record
* as well, but that's not tested here.
*/
static int
test_big_var(const char *testfile)
{
int ncid, varid, dimids[NUMDIMS];
size_t start[NUMDIMS] = {0, 0, 0, 0};
size_t count[NUMDIMS] = {1, 1, 1, DIM3};
short data[DIM3];
int j;
int nerrs = 0;
/* Create a file with one big 4D variable. */
if (nc_create(testfile, NC_CLOBBER, &ncid)) ERR;
if (nc_set_fill(ncid, NC_NOFILL, NULL)) ERR;
if (nc_def_dim(ncid, "dim0", DIM0, &dimids[0])) ERR;
if (nc_def_dim(ncid, "dim1", DIM1, &dimids[1])) ERR;
if (nc_def_dim(ncid, "dim2", DIM2, &dimids[2])) ERR;
if (nc_def_dim(ncid, "dim3", DIM3, &dimids[3])) ERR;
if (nc_def_var(ncid, "var", NC_SHORT, NUMDIMS, dimids, &varid)) ERR;
if (nc_enddef(ncid)) ERR;
/* write var(0,0,4294,*) as all FIRST_VAL */
start[0] = 0;
start[1] = 0;
start[2] = 4294;
for (j = 0; j < DIM3; j++)
data[j] = FIRST_VAL;
if (nc_put_vara_short(ncid, varid, start, count, &data[0])) ERR;
/* write var(0,1,0,*) as all 8588 */
start[0] = 0;
start[1] = 1;
start[2] = 0;
for (j = 0; j < DIM3; j++)
data[j] = SECOND_VAL;
if (nc_put_vara_short(ncid, varid, start, count, &data[0])) ERR;
/* Read and check var(0,0,4294,*) */
start[0] = 0;
start[1] = 0;
start[2] = 4294;
if (nc_get_vara_short(ncid, varid, start, count, &data[0])) ERR;
for (j = 0; j < DIM3; j++) {
if (data[j] != FIRST_VAL ) {
printf("error on start[0..2]: %ld,%ld,%ld j: %d, expected %d got %d\n",
start[0], start[1], start[2], j, FIRST_VAL, data[j]);
ERR;
if(nerrs++ > 1)
return nerrs;
}
}
if (nc_close(ncid)) ERR;
return NC_NOERR;
}
int
main(int argc, char **argv) {
int i;
char testfile[NC_MAX_NAME + 1];
printf("\n*** Testing multidimensional variable with more than 2**32 values\n");
sprintf(testfile, "%s/%s", TEMP_LARGE, FILE_NAME);
for (i = NC_FORMAT_CLASSIC; i <= NUM_FORMATS; i++)
{
printf("*** testing format %d file with short variable with > 2**32 values...", i);
nc_set_default_format(i, NULL);
if (test_big_var(testfile)) ERR_RET;
(void) remove(testfile);
SUMMARIZE_ERR;
}
FINAL_RESULTS;
}
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