MED fichier
UsesCase_MEDfield_11.c
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1 /* This file is part of MED.
2  *
3  * COPYRIGHT (C) 1999 - 2021 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 11 : read a field in a MED file with computing steps,
20  * profiles, integration points, interpolation families
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 nprofile, pit, profilesize;
46  char profilename[MED_NAME_SIZE+1]="";
47  med_int nintegrationpoint;
48  char localizationname[MED_NAME_SIZE+1]="";
49  med_int ninterp=0;
50  char interpname[MED_NAME_SIZE+1]="";
51  int ret=-1;
52 
53  /* open file */
54  fid = MEDfileOpen("UsesCase_MEDfield_10.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 how many interpolation family name for the field ?
76  */
77  if ((ninterp = MEDfieldnInterp(fid, fieldname)) < 0) {
78  MESSAGE("ERROR : Read how many interpolation functions for the field ...");
79  goto ERROR;
80  }
81  /* - Read each interpolation family name
82  * - The way to read an interpolation family and it's basis functions
83  * is described in UsesCase_MEDinterp_2 and UsesCase_MEDinterp_3 uses case
84  */
85  for (it=0; it<ninterp; it++) {
86  if (MEDfieldInterpInfo(fid,fieldname,it+1,interpname) < 0) {
87  MESSAGE("ERROR : read interpolation family name ...");
88  goto ERROR;
89  }
90  }
91 
92  /*
93  * Read field values for each computing step
94  */
95  for (csit=0; csit<nstep; csit++) {
96 
97  if (MEDfieldComputingStepInfo(fid, fieldname, csit+1, &numdt, &numit, &dt) < 0) {
98  MESSAGE("ERROR : Computing step info ...");
99  goto ERROR;
100  }
101 
102  /*
103  * ... In our case, we suppose that the field values are only defined on cells ...
104  */
105  for (it=1; it<=MED_N_CELL_FIXED_GEO; it++) {
106 
107  geotype = geotypes[it];
108  /*
109  * How many profile for each geometry type ?
110  */
111  if ((nprofile = MEDfieldnProfile(fid, fieldname, numdt, numit, MED_CELL, geotype,
112  profilename, localizationname)) < 0) {
113  MESSAGE("ERROR : read number of profile ");
114  goto ERROR;
115  }
116 
117  /*
118  * Read values for each profile
119  */
120  for (pit=0; pit<nprofile; pit++) {
121 
122  if ((nvalues = MEDfieldnValueWithProfile(fid, fieldname, numdt, numit, MED_CELL, geotype,
123  pit+1, MED_COMPACT_STMODE, profilename, &profilesize,
124  localizationname, &nintegrationpoint)) < 0) {
125  MESSAGE("ERROR : read number of values with a profile ...");
126  goto ERROR;
127  }
128 
129  if (nvalues) {
130  if ((values = (med_float *) malloc(sizeof(med_float)*nvalues*ncomponent*nintegrationpoint)) == NULL) {
131  MESSAGE("ERROR : memory allocation ...");
132  goto ERROR;
133  }
134  if (MEDfieldValueWithProfileRd(fid, fieldname, numdt, numit, MED_CELL, geotype,
135  MED_COMPACT_STMODE, profilename,
137  (unsigned char*) values) < 0) {
138  MESSAGE("ERROR : read fields values for cells ...");
139  free(values);
140  goto ERROR;
141  }
142  free(values);
143  }
144  }
145  }
146  }
147 
148  ret=0;
149  ERROR:
150 
151  /* close file */
152  if (MEDfileClose(fid) < 0) {
153  MESSAGE("ERROR : close file ...");
154  ret=-1;
155  }
156 
157  return ret;
158 }
MED_FULL_INTERLACE
Definition: med.h:96
main
int main(int argc, char **argv)
Definition: UsesCase_MEDfield_11.c:29
MEDfileOpen
MEDC_EXPORT med_idt MEDfileOpen(const char *const filename, const med_access_mode accessmode)
Ouverture d'un fichier MED.
Definition: MEDfileOpen.c:42
med_geometry_type
int med_geometry_type
Definition: med.h:194
MED_SNAME_SIZE
#define MED_SNAME_SIZE
Definition: med.h:82
med_idt
hid_t med_idt
Definition: med.h:331
MEDfieldnInterp
MEDC_EXPORT med_int MEDfieldnInterp(const med_idt fid, const char *const fieldname)
Cette routine renvoie le nombre de fonctions d'interpolation associées au champ résultat fieldname.
Definition: MEDfieldnInterp.c:35
MED_ACC_RDONLY
Definition: med.h:120
MED_CELL
Definition: med.h:143
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
MESSAGE
#define MESSAGE(chaine)
Definition: med_utils.h:324
med_int
int med_int
Definition: med.h:342
med_field_type
med_field_type
Definition: med.h:165
MED_GET_CELL_GEOMETRY_TYPE
med_geometry_type MED_GET_CELL_GEOMETRY_TYPE[MED_N_CELL_FIXED_GEO+2]
Definition: MEDiterators.c:55
med.h
med_bool
med_bool
Definition: med.h:260
MEDfieldInterpInfo
MEDC_EXPORT med_err MEDfieldInterpInfo(const med_idt fid, const char *const fieldname, const int interpit, char *const interpname)
Cette routine indique le nom interpname de la interpit ème fonction d'interpolation associées au cham...
Definition: MEDfieldInterpInfo.c:37
med_float
double med_float
Definition: med.h:336
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
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
MED_N_CELL_FIXED_GEO
#define MED_N_CELL_FIXED_GEO
Definition: med.h:239
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_NAME_SIZE
#define MED_NAME_SIZE
Definition: med.h:81
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
MEDfileClose
MEDC_EXPORT med_err MEDfileClose(med_idt fid)
Fermeture d'un fichier MED.
Definition: MEDfileClose.c:30
MED_ALL_CONSTITUENT
#define MED_ALL_CONSTITUENT
Definition: med.h:299
MED_COMPACT_STMODE
Definition: med.h:110
med_utils.h