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tst_rename.c
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tst_rename.c
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/*
* Demonstrate netcdf-4 rename bug.
*/
#include <netcdf.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
/* On error, prints line number and file of test program. */
#define ERR do { \
fflush(stdout); \
fprintf(stderr, "Unexpected result, %s, line: %d\n", \
__FILE__, __LINE__); \
return 2; \
} while (0)
#define FILE_NAME3 "tst_rnfix3.nc"
#define FILE_NAME4 "tst_rnfix4.nc"
#define ODIM_NAME "lat" /* name for coord dim */
#define NDIM_NAME "tal" /* new name for coord dim */
#define OVAR_NAME "lat" /* name for coord var */
#define NVAR_NAME "tal" /* new name for coord var */
#define OVAR2_NAME "rh" /* name for non-coord var that uses coord dim */
#define VAR_RANK 1 /* all vars in this test are of same rank */
#define DIM_LEN 2 /* all dims in this test are of same len */
/* For renaming tests. Create small test file of specified format
* with a coordinate dimension, corresponding coordinate variable, and
* a non-coordinate variable that uses the coordinate dimension.
*/
int
create_test_file(
char *path, /* filename */
int format /* NC_FORMAT_CLASSIC, NC_FORMAT_64BIT,
NC_FORMAT_NETCDF4, or NC_FORMAT_NETCDF4_CLASSIC */
)
{
int ncid, dimid, varid, var2id;
int dims[VAR_RANK];
int lats[DIM_LEN] = {-90, 90};
float rh[DIM_LEN] = {0.25, 0.75};
switch (format) {
case (NC_FORMAT_CLASSIC):
if (nc_create(path, 0, &ncid)) ERR;
break;
case (NC_FORMAT_64BIT_OFFSET):
if (nc_create(path, NC_64BIT_OFFSET, &ncid)) ERR;
break;
case (NC_FORMAT_NETCDF4):
if (nc_create(path, NC_NETCDF4, &ncid)) ERR;
break;
case(NC_FORMAT_NETCDF4_CLASSIC):
if (nc_create(path, NC_NETCDF4 | NC_CLASSIC_MODEL, &ncid)) ERR;
break;
default:
ERR;
return NC_ENOTNC;
}
if (nc_def_dim(ncid, ODIM_NAME, DIM_LEN, &dimid)) ERR;
dims[0] = dimid;
if (nc_def_var(ncid, OVAR_NAME, NC_INT, VAR_RANK, dims, &varid)) ERR;
if (nc_def_var(ncid, OVAR2_NAME, NC_FLOAT, VAR_RANK, dims, &var2id)) ERR;
if (nc_enddef(ncid)) ERR; /* not necessary for netCDF-4 files */
if (nc_put_var_int(ncid, varid, lats)) ERR;
if (nc_put_var_float(ncid, var2id, rh)) ERR;
if (nc_close(ncid)) ERR;
return 0;
}
int
main(int argc, char **argv)
{
#define NUM_FORMATS 2
int formats[NUM_FORMATS] = {NC_FORMAT_NETCDF4, NC_FORMAT_NETCDF4_CLASSIC};
char *fmt_names[] = {"netCDF-4", "netCDF-4 classic model"};
char *file_names[] = {FILE_NAME3, FILE_NAME4};
int format;
fprintf(stderr,"*** Testing netcdf rename bugs and fixes.\n");
for(format = 0; format < NUM_FORMATS; format++)
{
int ncid, dimid, varid, var2id;
int lats[DIM_LEN] = {-90, 90};
int lats_in[DIM_LEN];
float rh[DIM_LEN] = {0.25, 0.75};
float rh_in[DIM_LEN];
int ii;
fprintf(stderr,"*** Test renaming coordinate variable and its dimension for %s...\n",
fmt_names[format]);
if (create_test_file(file_names[format], formats[format])) ERR;
if (nc_open(file_names[format], NC_WRITE, &ncid)) ERR;
if (nc_inq_dimid(ncid, ODIM_NAME, &dimid)) ERR;
if (nc_inq_varid(ncid, OVAR_NAME, &varid)) ERR;
if (nc_inq_varid(ncid, OVAR2_NAME, &var2id)) ERR;
if (nc_redef(ncid)) ERR; /* omitting this and nc_enddef call eliminates bug */
if (nc_rename_dim(ncid, dimid, NDIM_NAME)) ERR;
if (nc_rename_var(ncid, varid, NVAR_NAME)) ERR;
if (nc_enddef(ncid)) ERR;
if (nc_get_var_int(ncid, varid, lats_in)) ERR;
for (ii = 0; ii < DIM_LEN; ii++) {
if (lats_in[ii] != lats[ii])
fprintf(stderr, "\tlats_in[%d] is %d, should be %d\n", ii, lats_in[ii], lats[ii]);
}
if (nc_get_var_float(ncid, var2id, rh_in)) ERR;
for (ii = 0; ii < DIM_LEN; ii++) {
if (rh_in[ii] != rh[ii])
fprintf(stderr, "\trh_in[%d] is %g, should be %g\n", ii, rh_in[ii], rh[ii]);
}
if (nc_close(ncid)) ERR;
fprintf(stderr,"*** Test renaming just coordinate variable for %s...\n",
fmt_names[format]);
if (create_test_file(file_names[format], formats[format])) ERR;
if (nc_open(file_names[format], NC_WRITE, &ncid)) ERR;
if (nc_inq_dimid(ncid, ODIM_NAME, &dimid)) ERR;
if (nc_inq_varid(ncid, OVAR_NAME, &varid)) ERR;
if (nc_inq_varid(ncid, OVAR2_NAME, &var2id)) ERR;
if (nc_redef(ncid)) ERR; /* omitting this and nc_enddef call eliminates bug */
/* if (nc_rename_dim(ncid, dimid, NDIM_NAME)) ERR; */
if (nc_rename_var(ncid, varid, NVAR_NAME)) ERR;
if (nc_enddef(ncid)) ERR;
if (nc_get_var_int(ncid, varid, lats_in)) ERR;
for (ii = 0; ii < DIM_LEN; ii++) {
if (lats_in[ii] != lats[ii])
fprintf(stderr, "\tlats_in[%d] is %d, should be %d\n", ii, lats_in[ii], lats[ii]);
}
if (nc_get_var_float(ncid, var2id, rh_in)) ERR;
for (ii = 0; ii < DIM_LEN; ii++) {
if (rh_in[ii] != rh[ii])
fprintf(stderr, "\trh_in[%d] is %g, should be %g\n", ii, rh_in[ii], rh[ii]);
}
if (nc_close(ncid)) ERR;
fprintf(stderr,"*** Test renaming just coordinate dimension for %s...\n",
fmt_names[format]);
if (create_test_file(file_names[format], formats[format])) ERR;
if (nc_open(file_names[format], NC_WRITE, &ncid)) ERR;
if (nc_inq_dimid(ncid, ODIM_NAME, &dimid)) ERR;
if (nc_inq_varid(ncid, OVAR_NAME, &varid)) ERR;
if (nc_inq_varid(ncid, OVAR2_NAME, &var2id)) ERR;
if (nc_redef(ncid)) ERR; /* omitting this and nc_enddef call eliminates bug */
if (nc_rename_dim(ncid, dimid, NDIM_NAME)) ERR;
/* if (nc_rename_var(ncid, varid, NVAR_NAME)) ERR; */
if (nc_enddef(ncid)) ERR;
if (nc_get_var_int(ncid, varid, lats_in)) ERR;
for (ii = 0; ii < DIM_LEN; ii++) {
if (lats_in[ii] != lats[ii])
fprintf(stderr, "\tlats_in[%d] is %d, should be %d\n", ii, lats_in[ii], lats[ii]);
}
if (nc_get_var_float(ncid, var2id, rh_in)) ERR;
for (ii = 0; ii < DIM_LEN; ii++) {
if (rh_in[ii] != rh[ii])
fprintf(stderr, "\trh_in[%d] is %g, should be %g\n", ii, rh_in[ii], rh[ii]);
}
if (nc_close(ncid)) ERR;
if (formats[format] == NC_FORMAT_NETCDF4) {
printf("*** Test renaming attribute in sub-group for %s...\n",
fmt_names[format]);
{
#define DIMNAME "lon"
#define VARNAME "lon"
#define G1_VARNAME "lon"
#define OLD_NAME "units"
#define NEW_NAME "new_units"
#define CONTENTS "degrees_east"
#define RANK_lon 1
#define GRP_NAME "g1"
#define RANK_g1_lon 1
/* IDs of file, groups, dimensions, variables, attributes */
int ncid, g1_grp, lon_dim, lon_var, g1_lon_var, units_att;
size_t lon_len = 4;
char *data_in;
/* variable shapes */
int lon_dims[RANK_lon];
int g1_lon_dims[RANK_g1_lon];
if (!(data_in = malloc(strlen(CONTENTS) + 1))) ERR;
/* Create test file */
if (nc_create(file_names[format], NC_NETCDF4 | NC_CLOBBER, &ncid)) ERR;
/* Create subgroup and outer dimension */
if (nc_def_grp(ncid, GRP_NAME, &g1_grp)) ERR;
if (nc_def_dim(ncid, DIMNAME, lon_len, &lon_dim)) ERR;
/* Create outer variable and subgroup variable */
lon_dims[0] = lon_dim;
if (nc_def_var(ncid, VARNAME, NC_FLOAT, RANK_lon, lon_dims, &lon_var)) ERR;
g1_lon_dims[0] = lon_dim;
if (nc_def_var(g1_grp, G1_VARNAME, NC_FLOAT, RANK_g1_lon, g1_lon_dims, &g1_lon_var)) ERR;
/* assign per-variable attributes */
if (nc_put_att_text(ncid, lon_var, OLD_NAME, strlen(CONTENTS), CONTENTS)) ERR;
if (nc_put_att_text(g1_grp, g1_lon_var, OLD_NAME, strlen(CONTENTS), CONTENTS)) ERR;
if (nc_enddef (ncid)) ERR;
/* write variable data */
{
float lon_data[4] = {0, 90, 180, 270};
size_t start[] = {0};
size_t count[] = {4};
if (nc_put_vara(ncid, lon_var, start, count, lon_data)) ERR;
}
{
float g1_lon_data[4] = {0, 90, 180, 270};
size_t start[] = {0};
size_t count[] = {4};
if (nc_put_vara(g1_grp, g1_lon_var, start, count, g1_lon_data)) ERR;
}
if (nc_close(ncid)) ERR;
/* reopen the file and rename the attribute in the subgroup */
if (nc_open(file_names[format], NC_WRITE, &ncid)) ERR;
if (nc_inq_grp_ncid(ncid, GRP_NAME, &g1_grp)) ERR;
if (nc_inq_varid(g1_grp,VARNAME,&g1_lon_var)) ERR;
if (nc_rename_att(g1_grp, g1_lon_var, OLD_NAME, NEW_NAME)) ERR;
if (nc_close(ncid)) ERR;
/* reopen the file again and see if renamed attribute exists and
has expected value */
{
nc_type att_type;
size_t att_len;
if (nc_open(file_names[format], NC_NOWRITE, &ncid)) ERR;
if (nc_inq_grp_ncid(ncid, GRP_NAME, &g1_grp)) ERR;
if (nc_inq_varid(g1_grp, VARNAME, &g1_lon_var)) ERR;
if (nc_get_att_text(g1_grp, g1_lon_var, NEW_NAME, data_in)) ERR;
if (strncmp(CONTENTS, data_in, strlen(CONTENTS))) ERR;
if (nc_close(ncid)) ERR;
}
free(data_in);
}
}
}
return(0);
}