#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 *verticesvalues = NULL;
  med_float *tria3values = NULL;
  med_float *quad4values = NULL;
  med_int nstep, nvalues;
  const med_int ncomponent = 1;
  int ret=-1;
  
  fid = MEDfileOpen("UsesCase_MEDfield_1.med",MED_ACC_RDONLY);
  if (fid < 0) {
    MESSAGE("ERROR : open file ...");
    goto ERROR;
  }
  
  
  if (MEDfieldInfoByName(fid, fieldname, meshname, &localmesh, &fieldtype,
                         componentname, componentunit, dtunit, &nstep) < 0) {
    MESSAGE("ERROR : Field info by name ...");
    goto ERROR;
  } 
  
  
  
  if ((nvalues = MEDfieldnValue(fid, fieldname, MED_NO_DT, MED_NO_IT, MED_NODE, MED_NONE)) < 0) {
    MESSAGE("ERROR : read number of values ...");
    goto ERROR;
  }
  if ((verticesvalues = (med_float *) malloc(sizeof(med_float)*nvalues*ncomponent)) == NULL) {
    MESSAGE("ERROR : memory allocation ...");
    goto ERROR;
  }
  if (MEDfieldValueRd(fid, fieldname, MED_NO_DT, MED_NO_IT, MED_NODE, MED_NONE,
                      MED_FULL_INTERLACE, MED_ALL_CONSTITUENT, (unsigned char*) verticesvalues) < 0) {
    MESSAGE("ERROR : read fields values on vertices ...");
    free(verticesvalues);
    goto ERROR;
  }
  free(verticesvalues);
  
  
  if ((nvalues = MEDfieldnValue(fid, fieldname, MED_NO_DT, MED_NO_IT, MED_CELL, 
                                MED_TRIA3)) < 0) {
    MESSAGE("ERROR : read number of values ...");
    goto ERROR;
  }
  if ((tria3values = (med_float *) malloc(sizeof(med_float)*nvalues*ncomponent)) == NULL) {
    MESSAGE("ERROR : memory allocation ...");
    goto ERROR;
  }
  if (MEDfieldValueRd(fid, fieldname, MED_NO_DT, MED_NO_IT, MED_CELL, MED_TRIA3,
                      MED_FULL_INTERLACE, MED_ALL_CONSTITUENT, (unsigned char*) tria3values) < 0) {
    MESSAGE("ERROR : read fields values for MED_TRIA3 cells ...");
    free(tria3values);
    goto ERROR;
  }
  free(tria3values);
  
  if ((nvalues = MEDfieldnValue(fid, fieldname, MED_NO_DT, MED_NO_IT, MED_CELL, 
                                MED_QUAD4)) < 0) {
    MESSAGE("ERROR : read number of values ...");
    goto ERROR;
  }
  if ((quad4values = (med_float *) malloc(sizeof(med_float)*nvalues*ncomponent)) == NULL) {
    MESSAGE("ERROR : memory allocation ...");
    goto ERROR;
  }
  if (MEDfieldValueRd(fid, fieldname, MED_NO_DT, MED_NO_IT, MED_CELL, MED_QUAD4,
                      MED_FULL_INTERLACE, MED_ALL_CONSTITUENT, (unsigned char*) quad4values) < 0) {
    MESSAGE("ERROR : read fields values for MED_QUAD4 cells ...");
    free(quad4values);
    goto ERROR;
  }  
  free(quad4values);
  ret=0;
 ERROR:
  
  if (MEDfileClose(fid) < 0) {
    MESSAGE("ERROR : close file ...");
    ret=-1;
  } 
  return ret;
}