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UsesCase_MEDfield_14.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 #include <med.h>
19 #define MESGERR 1
20 #include <med_utils.h>
21 
22 #include <string.h>
23 
24 #include <med.h>
25 #define MESGERR 1
26 #include <med_utils.h>
27 
28 #include <string.h>
29 
30 /*
31  * Field use case 14 : read a field on nodes elements (generic approach) in a MED file
32  */
33 
34 
35 int main (int argc, char **argv) {
36  med_idt fid;
37  med_idt nfield, i, j;
38  char meshname[MED_NAME_SIZE+1]="";
39  med_bool localmesh;
40  char fieldname[MED_NAME_SIZE+1]="";
41  med_field_type fieldtype;
42  char *componentname = NULL;
43  char *componentunit = NULL;
44  char dtunit[MED_SNAME_SIZE+1]="";
45  med_float *values = NULL;
46  med_int nstep, nvalues;
47  med_int ncomponent;
48  med_int csit, numit, numdt, it;
49  med_float dt;
50  med_geometry_type geotype;
52  med_int nprofile, pit, profilesize;
53  char profilename[MED_NAME_SIZE+1]="";
54  med_int nintegrationpoint;
55  char localizationname[MED_NAME_SIZE+1]="";
56  int k;
57  int ret=-1;
58 
59  /* open file */
60  fid = MEDfileOpen("UsesCase_MEDfield_13.med",MED_ACC_RDONLY);
61  if (fid < 0) {
62  MESSAGE("ERROR : open file ...");
63  goto ERROR;
64  }
65 
66  /*
67  * generic approach : how many fields in the file and identification
68  * of each field.
69  */
70  if ((nfield = MEDnField(fid)) < 0) {
71  MESSAGE("ERROR : How many fields in the file ...");
72  goto ERROR;
73  }
74 
75  /*
76  * read values for each field
77  */
78  for (i=0; i<nfield; i++) {
79 
80  if ((ncomponent = MEDfieldnComponent(fid,i+1)) < 0) {
81  MESSAGE("ERROR : number of field component ...");
82  goto ERROR;
83  }
84 
85  if ((componentname = (char *) malloc(ncomponent*MED_SNAME_SIZE+1)) == NULL) {
86  MESSAGE("ERROR : memory allocation ...");
87  goto ERROR;
88  }
89 
90  if ((componentunit = (char *) malloc(ncomponent*MED_SNAME_SIZE+1)) == NULL) {
91  MESSAGE("ERROR : memory allocation ...");
92  goto ERROR;
93  }
94 
95  if (MEDfieldInfo(fid, i+1, fieldname, meshname, &localmesh, &fieldtype,
96  componentname, componentunit, dtunit, &nstep) < 0) {
97  MESSAGE("ERROR : Field info ...");
98  free(componentname);
99  free(componentunit);
100  goto ERROR;
101  }
102 
103  free(componentname);
104  free(componentunit);
105 
106  /*
107  * Read field values for each computing step
108  */
109  for (csit=0; csit<nstep; csit++) {
110 
111  if (MEDfieldComputingStepInfo(fid, fieldname, csit+1, &numdt, &numit, &dt) < 0) {
112  MESSAGE("ERROR : Computing step info ...");
113  goto ERROR;
114  }
115 
116  /*
117  * ... In our case, we suppose that the field values are only defined on nodes element ...
118  */
119  for (it=1; it<= MED_N_CELL_FIXED_GEO; it++) {
120 
121  geotype = geotypes[it];
122  /*
123  * How many profile for each geometry type ?
124  */
125  if ((nprofile = MEDfieldnProfile(fid, fieldname, numdt, numit, MED_NODE_ELEMENT, geotype,
126  profilename, localizationname)) < 0) {
127  MESSAGE("ERROR : read number of profile ");
128  goto ERROR;
129  }
130 
131  /*
132  * Read values for each profile
133  */
134  for (pit=0; pit<nprofile; pit++) {
135 
136  if ((nvalues = MEDfieldnValueWithProfile(fid, fieldname, numdt, numit, MED_NODE_ELEMENT, geotype,
137  pit+1, MED_COMPACT_STMODE, profilename, &profilesize,
138  localizationname, &nintegrationpoint)) < 0) {
139  MESSAGE("ERROR : read number of values with a profile ...");
140  goto ERROR;
141  }
142 
143  if (nvalues) {
144  if ((values = (med_float *) malloc(sizeof(med_float)*nvalues*ncomponent*nintegrationpoint)) == NULL) {
145  MESSAGE("ERROR : memory allocation ...");
146  goto ERROR;
147  }
148  if (MEDfieldValueWithProfileRd(fid, fieldname, numdt, numit, MED_NODE_ELEMENT, geotype,
149  MED_COMPACT_STMODE, profilename,
151  (unsigned char*) values) < 0) {
152  MESSAGE("ERROR : read fields values for node elements ...");
153  free(values);
154  goto ERROR;
155  }
156  free(values);
157  }
158  }
159  }
160  }
161  }
162 
163  ret=0;
164  ERROR:
165 
166  /* close file */
167  if (MEDfileClose(fid) < 0) {
168  MESSAGE("ERROR : close file ...");
169  ret=-1;
170  }
171 
172  return ret;
173 }
MEDfieldInfo
MEDC_EXPORT med_err MEDfieldInfo(const med_idt fid, const int ind, 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 d'indice ind .
Definition: MEDfieldInfo.c:42
MED_ACC_RDONLY
Definition: med.h:122
main
int main(int argc, char **argv)
Definition: UsesCase_MEDfield_14.c:35
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
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
MEDfieldnComponent
MEDC_EXPORT med_int MEDfieldnComponent(const med_idt fid, const int ind)
Cette fonction lit le nombre de composantes d'un champ.
Definition: MEDfieldnComponent.c:34
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_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_NODE_ELEMENT
Definition: med.h:146
MED_ALL_CONSTITUENT
#define MED_ALL_CONSTITUENT
Definition: med.h:301
med_utils.h
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
MEDnField
MEDC_EXPORT med_int MEDnField(const med_idt fid)
Cette fonction permet de lire le nombre de champs dans un fichier.
Definition: MEDnField.c:35