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00063 #include <io.h>
00064
00066 int
00067 get_time_info(time_vect_struct *time_s, double **timeval, char **time_units, char **cal_type, int *ntime, char *filename,
00068 char *varname, int outinfo) {
00082 int istat;
00083
00084 size_t dimval;
00085
00086 int ncinid;
00087 int timediminid;
00088 int timeinid;
00089 nc_type vartype_time;
00090
00091 int varndims;
00092 int vardimids[NC_MAX_VAR_DIMS];
00093
00094 size_t start[3];
00095 size_t count[3];
00096
00097 size_t t_len;
00098 ut_system *unitSystem = NULL;
00099 ut_unit *dataunits = NULL;
00100
00101 int t;
00102
00103
00104
00105
00106 if (outinfo == TRUE)
00107 printf("%s: Opening for reading time information in NetCDF input file %s\n", __FILE__, filename);
00108 istat = nc_open(filename, NC_NOWRITE, &ncinid);
00109 if (istat != NC_NOERR) {
00110 (void) fprintf(stderr, "%s: filename = %s\n", __FILE__, filename);
00111 handle_netcdf_error(istat, __FILE__, __LINE__);
00112 }
00113
00114
00115 istat = nc_inq_dimid(ncinid, varname, &timediminid);
00116 if (istat != NC_NOERR) handle_netcdf_error(istat, __FILE__, __LINE__);
00117 istat = nc_inq_dimlen(ncinid, timediminid, &dimval);
00118 if (istat != NC_NOERR) handle_netcdf_error(istat, __FILE__, __LINE__);
00119 *ntime = (int) dimval;
00120
00121 istat = nc_inq_varid(ncinid, varname, &timeinid);
00122 if (istat != NC_NOERR) handle_netcdf_error(istat, __FILE__, __LINE__);
00123
00124
00125 istat = nc_inq_var(ncinid, timeinid, (char *) NULL, &vartype_time, &varndims, vardimids, (int *) NULL);
00126 if (istat != NC_NOERR) handle_netcdf_error(istat, __FILE__, __LINE__);
00127
00128 if (varndims != 1) {
00129 (void) fprintf(stderr, "Error NetCDF type and/or dimensions Line %d.\n", __LINE__);
00130 return -1;
00131 }
00132
00133
00134 start[0] = 0;
00135 count[0] = (size_t) (*ntime);
00136 (*timeval) = malloc((*ntime) * sizeof(double));
00137 if ((*timeval) == NULL) alloc_error(__FILE__, __LINE__);
00138
00139
00140 istat = nc_get_vara_double(ncinid, timeinid, start, count, *timeval);
00141 if (istat != NC_NOERR) handle_netcdf_error(istat, __FILE__, __LINE__);
00142
00143
00144 for (t=0; t<(*ntime); t++)
00145 if ((*timeval)[t] != 0.0)
00146 break;
00147 if (t == (*ntime)) {
00148 fprintf(stderr, "WARNING: Time variable values all zero!!! Fixing time variable to index value...\n");
00149 for (t=0; t<(*ntime); t++)
00150 (*timeval)[t] = (double) t;
00151 }
00152
00153
00154 istat = nc_inq_attlen(ncinid, timeinid, "units", &t_len);
00155 if (istat != NC_NOERR) handle_netcdf_error(istat, __FILE__, __LINE__);
00156
00157 (*time_units) = (char *) malloc((t_len+1) * sizeof(char));
00158 if ((*time_units) == NULL) alloc_error(__FILE__, __LINE__);
00159
00160 istat = nc_get_att_text(ncinid, timeinid, "units", *time_units);
00161 if (istat != NC_NOERR) handle_netcdf_error(istat, __FILE__, __LINE__);
00162
00163 if ((*time_units)[t_len-2] == 'Z')
00164 (*time_units)[t_len-2] = '\0';
00165 else if ((*time_units)[t_len-1] == 'Z')
00166 (*time_units)[t_len-1] = '\0';
00167 else
00168 (*time_units)[t_len] = '\0';
00169
00170
00171 istat = nc_inq_attlen(ncinid, timeinid, "calendar", &t_len);
00172 if (istat != NC_NOERR) {
00173
00174 *cal_type = strdup("gregorian");
00175 }
00176 else {
00177
00178 (*cal_type) = (char *) malloc(t_len + 1);
00179 if ((*cal_type) == NULL) alloc_error(__FILE__, __LINE__);
00180
00181 istat = nc_get_att_text(ncinid, timeinid, "calendar", *cal_type);
00182 if (istat != NC_NOERR) handle_netcdf_error(istat, __FILE__, __LINE__);
00183 (*cal_type)[t_len] = '\0';
00184 }
00185
00186
00187 time_s->year = (int *) malloc((*ntime) * sizeof(int));
00188 if (time_s->year == NULL) alloc_error(__FILE__, __LINE__);
00189 time_s->month = (int *) malloc((*ntime) * sizeof(int));
00190 if (time_s->month == NULL) alloc_error(__FILE__, __LINE__);
00191 time_s->day = (int *) malloc((*ntime) * sizeof(int));
00192 if (time_s->day == NULL) alloc_error(__FILE__, __LINE__);
00193 time_s->hour = (int *) malloc((*ntime) * sizeof(int));
00194 if (time_s->hour == NULL) alloc_error(__FILE__, __LINE__);
00195 time_s->minutes = (int *) malloc((*ntime) * sizeof(int));
00196 if (time_s->minutes == NULL) alloc_error(__FILE__, __LINE__);
00197 time_s->seconds = (double *) malloc((*ntime) * sizeof(double));
00198 if (time_s->seconds == NULL) alloc_error(__FILE__, __LINE__);
00199
00200
00201 ut_set_error_message_handler(ut_ignore);
00202 unitSystem = ut_read_xml(NULL);
00203 ut_set_error_message_handler(ut_write_to_stderr);
00204
00205 dataunits = ut_parse(unitSystem, (*time_units), UT_ASCII);
00206 for (t=0; t<(*ntime); t++) {
00207 istat = utCalendar2_cal((*timeval)[t], dataunits, &(time_s->year[t]), &(time_s->month[t]), &(time_s->day[t]),
00208 &(time_s->hour[t]), &(time_s->minutes[t]), &(time_s->seconds[t]), *cal_type);
00209 if (istat < 0) {
00210 (void) ut_free(dataunits);
00211 (void) ut_free_system(unitSystem);
00212 return -1;
00213 }
00214 }
00215
00216 (void) ut_free(dataunits);
00217 (void) ut_free_system(unitSystem);
00218
00220 istat = ncclose(ncinid);
00221 if (istat != NC_NOERR) handle_netcdf_error(istat, __FILE__, __LINE__);
00222
00223
00224 return 0;
00225 }