MED fichier
usecases/c/UsesCase_MEDfield_8.c
/* This file is part of MED.
*
* COPYRIGHT (C) 1999 - 2016 EDF R&D, CEA/DEN
* MED is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* MED is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with MED. If not, see <http://www.gnu.org/licenses/>.
*/
/*
* Field use case 8 : read a field with following features computing steps and profiles
*/
#include <med.h>
#define MESGERR 1
#include <med_utils.h>
#include <string.h>
int main (int argc, char **argv) {
med_idt fid;
char meshname[MED_NAME_SIZE+1]="";
med_bool localmesh;
const char fieldname[MED_NAME_SIZE+1] = "TEMPERATURE_FIELD";
med_field_type fieldtype;
char componentname[MED_SNAME_SIZE+1]="";
char componentunit[MED_SNAME_SIZE+1]="";
char dtunit[MED_SNAME_SIZE+1]="";
med_float *values = NULL;
med_int nstep, nvalues;
med_int ncomponent = 1;
med_int csit, numit, numdt, it;
med_int pit, profilesize;
med_int np;
char profilename[MED_NAME_SIZE+1] = "";
med_int nintegrationpoint;
char localizationname[MED_NAME_SIZE+1] = "";
int ret = -1;
/* open file */
fid = MEDfileOpen("UsesCase_MEDfield_7.med",MED_ACC_RDONLY);
if (fid < 0) {
MESSAGE("ERROR : open file ...");
goto ERROR;
}
/*
* ... we know that the MED file has only one field with one component ,
* a real code would check ...
*/
/*
* if you know the field name, direct access to field informations
*/
if (MEDfieldInfoByName(fid, fieldname, meshname, &localmesh, &fieldtype,
componentname, componentunit, dtunit, &nstep) < 0) {
MESSAGE("ERROR : Field info by name ...");
goto ERROR;
}
/*
* Read field values for each computing step
*/
for (csit=0; csit<nstep; csit++) {
if (MEDfieldComputingStepInfo(fid, fieldname, csit+1, &numdt, &numit, &dt) < 0) {
MESSAGE("ERROR : Computing step info ...");
goto ERROR;
}
/*
* ... In our case, we suppose that the field values are only defined on cells ...
*/
for (it=1; it<=MED_N_CELL_FIXED_GEO; it++) {
geotype = geotypes[it];
/*
* How many profile for each geometry type ?
*/
if ((np = MEDfieldnProfile(fid, fieldname, numdt, numit, MED_CELL, geotype,
profilename, localizationname)) < 0) {
MESSAGE("ERROR : read number of profile ");
goto ERROR;
}
/*
* Read values for each profile
*/
for (pit=0; pit<np; pit++) {
if ((nvalues = MEDfieldnValueWithProfile(fid, fieldname, numdt, numit, MED_CELL, geotype,
pit+1, MED_COMPACT_STMODE, profilename, &profilesize,
localizationname, &nintegrationpoint)) < 0) {
MESSAGE("ERROR : read number of values with a profile ...");
goto ERROR;
}
if (nvalues) {
if ((values = (med_float *) malloc(sizeof(med_float)*nvalues*ncomponent)) == NULL) {
MESSAGE("ERROR : memory allocation ...");
goto ERROR;
}
if (MEDfieldValueWithProfileRd(fid, fieldname, numdt, numit, MED_CELL, geotype,
MED_COMPACT_STMODE, profilename,
(unsigned char*) values) < 0) {
MESSAGE("ERROR : read fields values for cells ...");
free(values);
goto ERROR;
}
free(values);
}
}
}
}
ret=0;
ERROR:
/* close file */
if (MEDfileClose(fid) < 0) {
MESSAGE("ERROR : close file ...");
ret=-1;
}
return ret;
}