MED fichier
UsesCase_MEDfield_8.c
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1 /* This file is part of MED.
2  *
3  * COPYRIGHT (C) 1999 - 2023 EDF R&D, CEA/DEN
4  * MED is free software: you can redistribute it and/or modify
5  * it under the terms of the GNU Lesser General Public License as published by
6  * the Free Software Foundation, either version 3 of the License, or
7  * (at your option) any later version.
8  *
9  * MED is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12  * GNU Lesser General Public License for more details.
13  *
14  * You should have received a copy of the GNU Lesser General Public License
15  * along with MED. If not, see <http://www.gnu.org/licenses/>.
16  */
17 
18 /*
19  * Field use case 8 : read a field with following features computing steps and profiles
20  */
21 
22 
23 #include <med.h>
24 #define MESGERR 1
25 #include <med_utils.h>
26 
27 #include <string.h>
28 
29 int main (int argc, char **argv) {
30  med_idt fid;
31  char meshname[MED_NAME_SIZE+1]="";
32  med_bool localmesh;
33  const char fieldname[MED_NAME_SIZE+1] = "TEMPERATURE_FIELD";
34  med_field_type fieldtype;
35  char componentname[MED_SNAME_SIZE+1]="";
36  char componentunit[MED_SNAME_SIZE+1]="";
37  char dtunit[MED_SNAME_SIZE+1]="";
38  med_float *values = NULL;
39  med_int nstep, nvalues;
40  med_int ncomponent = 1;
41  med_int csit, numit, numdt, it;
42  med_float dt;
43  med_geometry_type geotype;
45  med_int pit, profilesize;
46  med_int np;
47  char profilename[MED_NAME_SIZE+1] = "";
48  med_int nintegrationpoint;
49  char localizationname[MED_NAME_SIZE+1] = "";
50  int ret = -1;
51 
52 
53  /* open file */
54  fid = MEDfileOpen("UsesCase_MEDfield_7.med",MED_ACC_RDONLY);
55  if (fid < 0) {
56  MESSAGE("ERROR : open file ...");
57  goto ERROR;
58  }
59 
60  /*
61  * ... we know that the MED file has only one field with one component ,
62  * a real code would check ...
63  */
64 
65  /*
66  * if you know the field name, direct access to field informations
67  */
68  if (MEDfieldInfoByName(fid, fieldname, meshname, &localmesh, &fieldtype,
69  componentname, componentunit, dtunit, &nstep) < 0) {
70  MESSAGE("ERROR : Field info by name ...");
71  goto ERROR;
72  }
73 
74  /*
75  * Read field values for each computing step
76  */
77  for (csit=0; csit<nstep; csit++) {
78 
79  if (MEDfieldComputingStepInfo(fid, fieldname, csit+1, &numdt, &numit, &dt) < 0) {
80  MESSAGE("ERROR : Computing step info ...");
81  goto ERROR;
82  }
83 
84  /*
85  * ... In our case, we suppose that the field values are only defined on cells ...
86  */
87  for (it=1; it<=MED_N_CELL_FIXED_GEO; it++) {
88 
89  geotype = geotypes[it];
90  /*
91  * How many profile for each geometry type ?
92  */
93  if ((np = MEDfieldnProfile(fid, fieldname, numdt, numit, MED_CELL, geotype,
94  profilename, localizationname)) < 0) {
95  MESSAGE("ERROR : read number of profile ");
96  goto ERROR;
97  }
98 
99  /*
100  * Read values for each profile
101  */
102  for (pit=0; pit<np; pit++) {
103 
104  if ((nvalues = MEDfieldnValueWithProfile(fid, fieldname, numdt, numit, MED_CELL, geotype,
105  pit+1, MED_COMPACT_STMODE, profilename, &profilesize,
106  localizationname, &nintegrationpoint)) < 0) {
107  MESSAGE("ERROR : read number of values with a profile ...");
108  goto ERROR;
109  }
110 
111  if (nvalues) {
112  if ((values = (med_float *) malloc(sizeof(med_float)*nvalues*ncomponent)) == NULL) {
113  MESSAGE("ERROR : memory allocation ...");
114  goto ERROR;
115  }
116  if (MEDfieldValueWithProfileRd(fid, fieldname, numdt, numit, MED_CELL, geotype,
117  MED_COMPACT_STMODE, profilename,
119  (unsigned char*) values) < 0) {
120  MESSAGE("ERROR : read fields values for cells ...");
121  free(values);
122  goto ERROR;
123  }
124 
125  free(values);
126  }
127  }
128  }
129  }
130 
131  ret=0;
132  ERROR:
133 
134  /* close file */
135  if (MEDfileClose(fid) < 0) {
136  MESSAGE("ERROR : close file ...");
137  ret=-1;
138  }
139 
140  return ret;
141 }
MED_ACC_RDONLY
Definition: med.h:122
MEDfieldnValueWithProfile
MEDC_EXPORT med_int MEDfieldnValueWithProfile(const med_idt fid, const char *const fieldname, const med_int numdt, const med_int numit, const med_entity_type entitype, const med_geometry_type geotype, const int profileit, const med_storage_mode storagemode, char *const profilename, med_int *const profilesize, char *const localizationname, med_int *const nintegrationpoint)
Cette fonction permet de lire le nombre de valeurs à lire dans un champ pour une étape de calcul,...
Definition: MEDfieldnValueWithProfile.c:45
med_geometry_type
int med_geometry_type
Definition: med.h:196
MED_SNAME_SIZE
#define MED_SNAME_SIZE
Definition: med.h:84
MED_COMPACT_STMODE
Definition: med.h:112
med_idt
hid_t med_idt
Definition: med.h:333
MEDfieldInfoByName
MEDC_EXPORT med_err MEDfieldInfoByName(const med_idt fid, const char *const fieldname, char *const meshname, med_bool *const localmesh, med_field_type *const fieldtype, char *const componentname, char *const componentunit, char *const dtunit, med_int *const ncstp)
Cette fonction permet de lire les informations concernant le champ de nom fieldname.
Definition: MEDfieldInfoByName.c:39
MESSAGE
#define MESSAGE(chaine)
Definition: med_utils.h:324
MED_FULL_INTERLACE
Definition: med.h:98
med_int
int med_int
Definition: med.h:344
MED_GET_CELL_GEOMETRY_TYPE
med_geometry_type MED_GET_CELL_GEOMETRY_TYPE[MED_N_CELL_FIXED_GEO+2]
Definition: MEDiterators.c:55
med_field_type
med_field_type
Definition: med.h:167
med_bool
med_bool
Definition: med.h:262
med_float
double med_float
Definition: med.h:338
MEDfieldnProfile
MEDC_EXPORT med_int MEDfieldnProfile(const med_idt fid, const char *const fieldname, const med_int numdt, const med_int numit, const med_entity_type enttype, const med_geometry_type geotype, char *const defaultprofilename, char *const defaultlocalizationname)
Cette fonction permet de lire le nombre de profils référencés dans un champ pour une étape de calcul,...
Definition: MEDfieldnProfile.c:40
MEDfileClose
MEDC_EXPORT med_err MEDfileClose(med_idt fid)
Fermeture d'un fichier MED.
Definition: MEDfileClose.c:30
MED_N_CELL_FIXED_GEO
#define MED_N_CELL_FIXED_GEO
Definition: med.h:241
MED_CELL
Definition: med.h:145
MED_NAME_SIZE
#define MED_NAME_SIZE
Definition: med.h:83
MEDfieldValueWithProfileRd
MEDC_EXPORT med_err MEDfieldValueWithProfileRd(const med_idt fid, const char *const fieldname, const med_int numdt, const med_int numit, const med_entity_type entitype, const med_geometry_type geotype, const med_storage_mode storagemode, const char *const profilename, const med_switch_mode switchmode, const med_int componentselect, unsigned char *const value)
Cette fonction permet de lire les valeurs d'un champ définies sur des entités d'un maillage pour une ...
Definition: MEDfieldValueWithProfileRd.c:42
MED_ALL_CONSTITUENT
#define MED_ALL_CONSTITUENT
Definition: med.h:301
med_utils.h
main
int main(int argc, char **argv)
Definition: UsesCase_MEDfield_8.c:29
MEDfieldComputingStepInfo
MEDC_EXPORT med_err MEDfieldComputingStepInfo(const med_idt fid, const char *const fieldname, const int csit, med_int *const numdt, med_int *const numit, med_float *const dt)
Cette fonction permet de lire les informations caractérisant une étape de calcul : numéro de pas de t...
Definition: MEDfieldComputingStepInfo.c:39
med.h
MEDfileOpen
MEDC_EXPORT med_idt MEDfileOpen(const char *const filename, const med_access_mode accessmode)
Ouverture d'un fichier MED.
Definition: MEDfileOpen.c:42