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69 lines
2.4 KiB
C
69 lines
2.4 KiB
C
/* This is part of the netCDF package.
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Copyright 2021 University Corporation for Atmospheric Research/Unidata
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See COPYRIGHT file for conditions of use.
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Test quantization of netcdf-4 variables. Quantization is the
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zeroing-out of bits in float or double data beyond a desired
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precision.
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Ed Hartnett, 8/19/21
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*/
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#include <nc_tests.h>
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#include "err_macros.h"
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#include "netcdf.h"
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#define FILE_NAME "tst_quantize.nc"
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#define NDIMS1 1
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#define DIM_NAME_1 "meters_along_canal"
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#define DIM_LEN_1 10
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#define VAR_NAME_1 "Amsterdam_houseboat_location"
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#define NSD_1 3
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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 netcdf-4 variable quantization functions.\n");
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printf("**** testing simple quantization and error conditions...");
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{
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int ncid, dimid, varid;
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int quantize_mode_in, nsd_in;
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/* Create a netcdf classic file with one var. Attempt
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* quantization. It will not work. */
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if (nc_create(FILE_NAME, NC_CLOBBER, &ncid)) ERR;
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if (nc_def_dim(ncid, DIM_NAME_1, DIM_LEN_1, &dimid)) ERR;
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if (nc_def_var(ncid, VAR_NAME_1, NC_FLOAT, NDIMS1, &dimid, &varid)) ERR;
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if (nc_def_var_quantize(ncid, varid, NC_QUANTIZE_BITGROOM, NSD_1) != NC_ENOTNC4) ERR;
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if (nc_inq_var_quantize(ncid, varid, &quantize_mode_in, &nsd_in) != NC_ENOTNC4) ERR;
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if (nc_close(ncid)) ERR;
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/* Create a netcdf-4 file with one var. Attempt
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* quantization. It will work, eventually... */
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if (nc_create(FILE_NAME, NC_NETCDF4|NC_CLOBBER, &ncid)) ERR;
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if (nc_def_dim(ncid, DIM_NAME_1, DIM_LEN_1, &dimid)) ERR;
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if (nc_def_var(ncid, VAR_NAME_1, NC_FLOAT, NDIMS1, &dimid, &varid)) ERR;
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/* Bad varid. */
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if (nc_def_var_quantize(ncid, NC_GLOBAL, NC_QUANTIZE_BITGROOM, NSD_1) != NC_EGLOBAL) ERR;
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if (nc_def_var_quantize(ncid, 1, NC_QUANTIZE_BITGROOM, NSD_1) != NC_ENOTVAR) ERR;
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/* This will work. */
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if (nc_def_var_quantize(ncid, varid, NC_QUANTIZE_BITGROOM, NSD_1)) ERR;
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if (nc_inq_var_quantize(ncid, varid, &quantize_mode_in, &nsd_in)) ERR;
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if (quantize_mode_in != NC_QUANTIZE_BITGROOM) ERR;
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if (nsd_in != NSD_1) ERR;
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if (nc_close(ncid)) ERR;
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/* Open the file and check. */
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if (nc_open(FILE_NAME, NC_WRITE, &ncid)) ERR;
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if (nc_inq_var_quantize(ncid, 0, &quantize_mode_in, &nsd_in)) ERR;
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/* printf("quantize_mode_in %d nsd_in %d\n", quantize_mode_in, nsd_in); */
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if (quantize_mode_in != NC_QUANTIZE_BITGROOM) ERR;
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if (nsd_in != NSD_1) ERR;
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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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