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130 lines
4.2 KiB
C
130 lines
4.2 KiB
C
/* This is part of the netCDF package.
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Copyright 2008 University Corporation for Atmospheric Research/Unidata.
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See COPYRIGHT file for conditions of use.
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This is a very simple example which writes a netCDF file with
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single- and double-precision NaNs and infinities.
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$Id: tst_nans.c,v 1.9 2009/09/14 20:50:45 russ Exp $
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*/
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#include <nc_tests.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <math.h>
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#include <netcdf.h>
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#include "isnan.h"
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#define FILE8_NAME "tst_nans.nc"
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#define FV_NAME _FillValue /* defined in netcdf.h */
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#define FV_NVALS 1
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#define ATT_NAME "att"
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#define NDIMS 1
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#define DIM_NAME "dim"
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#define NVALS 3
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#define F_NAME "fvar"
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#define D_NAME "dvar"
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#ifdef _MSC_VER
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#define NC_INFINITE (DBL_MAX+DBL_MAX)
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#define NC_FNAN (NC_INFINITE-NC_INFINITE)
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#define NC_DNAN (NC_INFINITE-NC_INFINITE)
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#define NC_FPINF NC_INFINITE
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#define NC_DPINF NC_INFINITE
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#else
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#define NC_FNAN (0.f/0.f)
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#define NC_DNAN (0.0/0.0)
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#define NC_FPINF (1.0f/0.0f)
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#define NC_DPINF (1.0/0.0)
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#endif
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int
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main(int argc, char **argv)
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{
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int ncid, dimid, fvarid, dvarid;
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float fvals[NVALS], fvals_in[NVALS];
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double dvals[NVALS], dvals_in[NVALS];
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float fnan = NC_FNAN;//(NC_INFINITE-NC_INFINITE);//0.f/0.f;
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double dnan = NC_DNAN;//(NC_INFINITE-NC_INFINITE);//0.0/0.0;
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float fpinf = NC_FPINF;//NC_INFINITE;//1.0f/0.0f;
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float fninf = -fpinf;
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double dpinf = NC_DPINF;//NC_INFINITE;//1.0/0.0;
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double dninf = -dpinf;
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nc_type att_type;
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size_t att_len;
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float att_fvals[NVALS];
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double att_dvals[NVALS];
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printf("\n*** Testing NaN\n");
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printf("*** creating NaN test file %s...", FILE8_NAME);
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if (nc_create(FILE8_NAME, NC_CLOBBER, &ncid)) ERR;
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if (nc_def_dim(ncid, DIM_NAME, NVALS, &dimid)) ERR;
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if (nc_def_var(ncid, F_NAME, NC_FLOAT, NDIMS, &dimid, &fvarid)) ERR;
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if (nc_def_var(ncid, D_NAME, NC_DOUBLE, NDIMS, &dimid, &dvarid)) ERR;
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fvals[0] = fninf;
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fvals[1] = fnan;
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fvals[2] = fpinf;
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dvals[0] = dninf;
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dvals[1] = dnan;
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dvals[2] = dpinf;
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/* Create float and double attributes */
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if (nc_put_att_float(ncid, fvarid, FV_NAME, NC_FLOAT, FV_NVALS, &fnan)) ERR;
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if (nc_put_att_float(ncid, fvarid, ATT_NAME, NC_FLOAT, NVALS, fvals)) ERR;
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if (nc_put_att_double(ncid, dvarid, FV_NAME, NC_DOUBLE, FV_NVALS, &dnan)) ERR;
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if (nc_put_att_double(ncid, dvarid, ATT_NAME, NC_DOUBLE, NVALS, dvals)) ERR;
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if (nc_enddef(ncid)) ERR;
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/* Write float and double data */
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if (nc_put_var_float(ncid, fvarid, fvals)) ERR;
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if (nc_put_var_double(ncid, dvarid, dvals)) ERR;
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if (nc_close(ncid)) ERR;
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/* Check it out. */
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/* Reopen the file. */
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if (nc_open(FILE8_NAME, NC_NOWRITE, &ncid)) ERR;
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if (nc_inq_varid(ncid, F_NAME, &fvarid)) ERR;
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if (nc_inq_varid(ncid, D_NAME, &dvarid)) ERR;
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/* Check the values of the float attributes */
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if (nc_inq_att(ncid, fvarid, FV_NAME, &att_type, &att_len)) ERR;
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if (att_type != NC_FLOAT || att_len != FV_NVALS) ERR;
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if (nc_get_att_float(ncid, fvarid, FV_NAME, att_fvals)) ERR;
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if (!isnan(att_fvals[0])) ERR;
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if (nc_get_att_float(ncid, fvarid, ATT_NAME, att_fvals)) ERR;
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if (!(isinf(att_fvals[0]) && att_fvals[0] < 0)) ERR;
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if (!isnan(att_fvals[1])) ERR;
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if (!(isinf(att_fvals[2]) && att_fvals[2] > 0)) ERR;
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/* Check the values of double attributes */
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if (nc_inq_att(ncid, dvarid, FV_NAME, &att_type, &att_len)) ERR;
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if (att_type != NC_DOUBLE || att_len != FV_NVALS) ERR;
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if (nc_get_att_double(ncid, dvarid, FV_NAME, att_dvals)) ERR;
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if (!isnan(att_dvals[0])) ERR;
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if (nc_get_att_double(ncid, dvarid, ATT_NAME, att_dvals)) ERR;
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if (!(isinf(att_dvals[0]) && att_dvals[0] < 0)) ERR;
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if (!isnan(att_dvals[1])) ERR;
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if (!(isinf(att_dvals[2]) && att_dvals[2] > 0)) ERR;
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/* Check values of float data */
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if (nc_get_var_float(ncid, fvarid, fvals_in)) ERR;
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if (!(isinf(fvals_in[0]) && fvals_in[0] < 0)) ERR;
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if (!isnan(fvals_in[1])) ERR;
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if (!(isinf(fvals_in[2]) && fvals_in[2] > 0)) ERR;
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/* Check values of double data */
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if (nc_get_var_double(ncid, dvarid, dvals_in)) ERR;
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if (!(isinf(dvals_in[0]) && dvals_in[0] < 0)) ERR;
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if (!isnan(dvals_in[1])) ERR;
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if (!(isinf(dvals_in[2]) && dvals_in[2] > 0)) ERR;
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if (nc_close(ncid)) ERR;
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SUMMARIZE_ERR;
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FINAL_RESULTS;
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}
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