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large_files.c
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large_files.c
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/*
Copyright 2004-2006, UCAR/Unidata
See COPYRIGHT file for copying and redistribution conditions.
This is part of netCDF.
This program also takes a long time to run - it writes some data in
a very large file, and then reads it all back to be sure it's
correct.
This program is an add-on test to check very large 64-bit offset
files (8 GB, so make sure you have the disk space!).
$Id: large_files.c,v 1.4 2008/03/10 17:02:41 ed Exp $
*/
#include <config.h>
#include <nc_tests.h>
#include <stdio.h>
#include <stdlib.h>
#include <netcdf.h>
#define FILE_NAME "large_files.nc"
static void
check_err(const int stat, const int line, const char *file) {
if (stat != NC_NOERR) {
(void) fprintf(stderr, "line %d of %s: %s\n", line, file, nc_strerror(stat));
exit(1);
}
}
int
main(int argc, char **argv) {
int stat; /* return status */
char file_name[NC_MAX_NAME + 1];
int ncid; /* netCDF id */
int rec, i, j, k;
int x[] = {42, 21};
/* dimension ids */
int rec_dim;
int i_dim;
int j_dim;
int k_dim;
int n_dim;
#define NUMRECS 2
#define I_LEN 4106
//#define I_LEN 5
//#if 0
//#define J_LEN 214700000
//#endif
//#define J_LEN 500000000
#define J_LEN 1023
#define K_LEN 1023
#define N_LEN 2
/* dimension lengths */
size_t rec_len = NC_UNLIMITED;
size_t i_len = I_LEN;
size_t j_len = J_LEN;
size_t k_len = K_LEN;
size_t n_len = N_LEN;
/* variable ids */
int var1_id;
int x_id;
/* rank (number of dimensions) for each variable */
# define RANK_var1 3
# define RANK_x 2
/* variable shapes */
int var1_dims[RANK_var1];
int x_dims[RANK_x];
printf("\n*** Testing large files, slowly.\n");
sprintf(file_name, "%s/%s", TEMP_LARGE, FILE_NAME);
printf("*** Creating large file %s...", file_name);
/* enter define mode */
stat = nc_create(file_name, NC_CLOBBER|NC_64BIT_OFFSET, &ncid);
check_err(stat,__LINE__,__FILE__);
/* define dimensions */
stat = nc_def_dim(ncid, "rec", rec_len, &rec_dim);
check_err(stat,__LINE__,__FILE__);
stat = nc_def_dim(ncid, "i", i_len, &i_dim);
check_err(stat,__LINE__,__FILE__);
stat = nc_def_dim(ncid, "j", j_len, &j_dim);
check_err(stat,__LINE__,__FILE__);
stat = nc_def_dim(ncid, "k", k_len, &k_dim);
check_err(stat,__LINE__,__FILE__);
stat = nc_def_dim(ncid, "n", n_len, &n_dim);
check_err(stat,__LINE__,__FILE__);
/* define variables */
x_dims[0] = rec_dim;
x_dims[1] = n_dim;
stat = nc_def_var(ncid, "x", NC_INT, RANK_x, x_dims, &x_id);
check_err(stat,__LINE__,__FILE__);
var1_dims[0] = rec_dim;
var1_dims[1] = i_dim;
var1_dims[2] = j_dim;
/*var1_dims[3] = k_dim;*/
stat = nc_def_var(ncid, "var1", NC_FLOAT, RANK_var1, var1_dims, &var1_id);
check_err(stat,__LINE__,__FILE__);
/* don't initialize variables with fill values */
stat = nc_set_fill(ncid, NC_NOFILL, 0);
check_err(stat,__LINE__,__FILE__);
/* leave define mode */
stat = nc_enddef (ncid);
check_err(stat,__LINE__,__FILE__);
{ /* store var1 */
/*static float var1[J_LEN];*/
static float *var1 = NULL;
var1 = malloc(sizeof(float)*J_LEN);
if(!var1) {
printf("Malloc failed. This may happen on systems with < 4GB. THIS TEST DID NOT PASS, but is returning 0.\n");
return 0;
}
static size_t var1_start[RANK_var1] = {0, 0, 0};
static size_t var1_count[RANK_var1] = {1, 1, J_LEN};
static size_t x_start[RANK_x] = {0, 0};
static size_t x_count[RANK_x] = {1, N_LEN};
for(rec=0; rec<NUMRECS; rec++) {
var1_start[0] = rec;
x_start[0] = rec;
for(i=0; i<I_LEN; i++) {
for(j=0; j<J_LEN; j++) {
var1[j] = (float)(j + (rec+1) * i);
}
var1_start[1] = i;
stat = nc_put_vara_float(ncid, var1_id, var1_start, var1_count, var1);
check_err(stat,__LINE__,__FILE__);
}
x[0] += rec; x[1] += rec;
stat = nc_put_vara_int(ncid, x_id, x_start, x_count, x);
check_err(stat,__LINE__,__FILE__);
}
free(var1);
}
stat = nc_close(ncid);
check_err(stat,__LINE__,__FILE__);
printf("ok\n");
printf("*** Reading large file %s...", file_name);
stat = nc_open(file_name, NC_NOWRITE, &ncid);
check_err(stat,__LINE__,__FILE__);
{ /* read var1 */
/*static float avar1[J_LEN];*/
static float *avar1 = NULL;
avar1 = (float*)malloc(sizeof(float)*J_LEN);
static size_t avar1_start[RANK_var1] = {0, 0, 0};
static size_t avar1_count[RANK_var1] = {1, 1, J_LEN};
static size_t ax_start[RANK_x] = {0, 0};
static size_t ax_count[RANK_x] = {1, N_LEN};
for(rec=0; rec<NUMRECS; rec++) {
avar1_start[0] = rec;
ax_start[0] = rec;
for(i=0; i<I_LEN; i++) {
avar1_start[1] = i;
stat = nc_get_vara_float(ncid, var1_id, avar1_start, avar1_count, avar1);
check_err(stat,__LINE__,__FILE__);
for(j=0; j<J_LEN; j++)
{
if (avar1[j] != (float)(j + (rec + 1) * i)) {
printf("Error on read, var1[%d, %d, %d] = %g wrong, "
"should be %g !\n", rec, i, j, avar1[j], (float) (j + (rec + 1)* i));
return 1;
}
}
}
nc_get_vara_int(ncid, x_id, ax_start, ax_count, x);
if(x[0] != (42 + rec) || x[1] != (21+rec)) {
printf("Error on read, x[] = %d, %d\n", x[0], x[1]);
return 1;
}
}
free(avar1);
}
stat = nc_close(ncid);
check_err(stat,__LINE__,__FILE__);
printf("ok\n");
printf("*** Tests successful!\n");
/* Delete the file. */
(void) remove(file_name);
return 0;
}