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UsesCase_MEDfield_12.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 12 : read a field (generic approach) in a MED file with computing steps,
32  * profiles, integration points and interpolation families
33  */
34 
35 
36 int main (int argc, char **argv) {
37  med_idt fid;
38  med_idt nfield, i, j;
39  char meshname[MED_NAME_SIZE+1]="";
40  med_bool localmesh;
41  char fieldname[MED_NAME_SIZE+1]="";
42  med_field_type fieldtype;
43  char *componentname = NULL;
44  char *componentunit = NULL;
45  char dtunit[MED_SNAME_SIZE+1]="";
46  med_float *values = NULL;
47  med_int nstep, nvalues;
48  med_int ncomponent;
49  med_int csit, numit, numdt, it;
50  med_float dt;
51  med_geometry_type geotype;
53  med_int nprofile, pit, profilesize;
54  char profilename[MED_NAME_SIZE+1]="";
55  med_int nintegrationpoint;
56  char localizationname[MED_NAME_SIZE+1]="";
57  int k;
58  med_int ninterp;
59  char interpname[MED_NAME_SIZE+1];
60  int ret=-1;
61 
62 
63  /* open file */
64  fid = MEDfileOpen("UsesCase_MEDfield_10.med",MED_ACC_RDONLY);
65  if (fid < 0) {
66  MESSAGE("ERROR : open file ...");
67  return -1;
68  }
69 
70  /*
71  * generic approach : how many fields in the file and identification
72  * of each field.
73  */
74  if ((nfield = MEDnField(fid)) < 0) {
75  MESSAGE("ERROR : How many fields in the file ...");
76  return -1;
77  }
78 
79  /*
80  * read values for each field
81  */
82  for (i=0; i<nfield; i++) {
83 
84  if ((ncomponent = MEDfieldnComponent(fid,i+1)) < 0) {
85  MESSAGE("ERROR : number of field component ...");
86  return -1;
87  }
88 
89  if ((componentname = (char *) malloc(ncomponent*MED_SNAME_SIZE+1)) == NULL) {
90  MESSAGE("ERROR : memory allocation ...");
91  return -1;
92  }
93 
94  if ((componentunit = (char *) malloc(ncomponent*MED_SNAME_SIZE+1)) == NULL) {
95  MESSAGE("ERROR : memory allocation ...");
96  return -1;
97  }
98 
99  if (MEDfieldInfo(fid, i+1, fieldname, meshname, &localmesh, &fieldtype,
100  componentname, componentunit, dtunit, &nstep) < 0) {
101  MESSAGE("ERROR : Field info ...");
102  free(componentname);
103  free(componentunit);
104  return -1;
105  }
106 
107  free(componentname);
108  free(componentunit);
109 
110  /*
111  * Read how many interpolation family name in the field ?
112  */
113  if ((ninterp = MEDfieldnInterp(fid, fieldname)) < 0) {
114  MESSAGE("ERROR : Read how many interpolation functions for the field ...");
115  return -1;
116  }
117  /* - Read each interlolation family name
118  * - The way to read an interploation family and it's basis functions
119  * is described in UsesCase_MEDinterp_2 and UsesCase_MEDinterp_3 uses case
120  */
121  for (it=0; it<ninterp; it++) {
122  if (MEDfieldInterpInfo(fid,fieldname,it+1,interpname) < 0) {
123  MESSAGE("ERROR : read interpolation family name ...");
124  return -1;
125  }
126  }
127 
128  /*
129  * Read field values for each computing step
130  */
131  for (csit=0; csit<nstep; csit++) {
132 
133  if (MEDfieldComputingStepInfo(fid, fieldname, csit+1, &numdt, &numit, &dt) < 0) {
134  MESSAGE("ERROR : Computing step info ...");
135  return -1;
136  }
137 
138  /*
139  * ... In our case, we suppose that the field values are only defined on cells ...
140  */
141  for (it=1; it<=MED_N_CELL_FIXED_GEO; it++) {
142 
143  geotype = geotypes[it];
144 
145  /*
146  * How many profile for each geometry type ?
147  */
148  if ((nprofile = MEDfieldnProfile(fid, fieldname, numdt, numit, MED_CELL, geotype,
149  profilename, localizationname)) < 0) {
150  MESSAGE("ERROR : read number of profile ");
151  return -1;
152  }
153 
154  /*
155  * Read values for each profile
156  */
157  for (pit=0; pit<nprofile; pit++) {
158 
159  if ((nvalues = MEDfieldnValueWithProfile(fid, fieldname, numdt, numit, MED_CELL, geotype,
160  pit+1, MED_COMPACT_STMODE, profilename, &profilesize,
161  localizationname, &nintegrationpoint)) < 0) {
162  MESSAGE("ERROR : read number of values with a profile ...");
163  return -1;
164  }
165 
166  if (nvalues) {
167  if ((values = (med_float *) malloc(sizeof(med_float)*nvalues*ncomponent*nintegrationpoint)) == NULL) {
168  MESSAGE("ERROR : memory allocation ...");
169  return -1;
170  }
171  if (MEDfieldValueWithProfileRd(fid, fieldname, numdt, numit, MED_CELL, geotype,
172  MED_COMPACT_STMODE, profilename,
174  (unsigned char*) values) < 0) {
175  MESSAGE("ERROR : read fields values for cells ...");
176  free(values);
177  return -1;
178  }
179  free(values);
180  }
181  }
182  }
183  }
184  }
185 
186  ret=0;
187  ERROR:
188 
189  /* close file */
190  if (MEDfileClose(fid) < 0) {
191  MESSAGE("ERROR : close file ...");
192  ret=-1;
193  }
194 
195  return ret;
196 }
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
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
main
int main(int argc, char **argv)
Definition: UsesCase_MEDfield_12.c:36
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
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
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_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
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
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
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