MED fichier: Fichier source de UsesCase_MEDfield_11.c

MED fichier

- Documentation MED
- Guides d'utilisation
- Guides de référence

UsesCase_MEDfield_11.c
Aller à la documentation de ce fichier.
1 /* This file is part of MED.
2 *
3 * COPYRIGHT (C) 1999 - 2019 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;
44 med_geometry_type *geotypes = MED_GET_CELL_GEOMETRY_TYPE;
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,
136 MED_FULL_INTERLACE, MED_ALL_CONSTITUENT,
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 }
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 séquence de calcul : numéro de pas d...
Definition: MEDfieldComputingStepInfo.c:39
main
int main(int argc, char **argv)
Definition: UsesCase_MEDfield_11.c:29
med_utils.h
MED_GET_CELL_GEOMETRY_TYPE
med_geometry_type MED_GET_CELL_GEOMETRY_TYPE[MED_N_CELL_FIXED_GEO+2]
Definition: MEDiterators.c:44
MEDfileOpen
MEDC_EXPORT med_idt MEDfileOpen(const char *const filename, const med_access_mode accessmode)
Ouverture d'un fichier MED.
Definition: MEDfileOpen.c:41
MED_N_CELL_FIXED_GEO
#define MED_N_CELL_FIXED_GEO
Definition: med.h:236
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 séquence de calc...
Definition: MEDfieldnProfile.c:40
MED_FULL_INTERLACE
Definition: med.h:94
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_float
double med_float
Definition: med.h:331
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_ALL_CONSTITUENT
#define MED_ALL_CONSTITUENT
Definition: med.h:296
MESSAGE
#define MESSAGE(chaine)
Definition: med_utils.h:316
MEDfileClose
MEDC_EXPORT med_err MEDfileClose(med_idt fid)
Fermeture d'un fichier MED.
Definition: MEDfileClose.c:30
MED_COMPACT_STMODE
Definition: med.h:108
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
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 séquence de calcul...
Definition: MEDfieldnValueWithProfile.c:45
MED_CELL
Definition: med.h:141
med_int
int med_int
Definition: med.h:337
med_field_type
med_field_type
Definition: med.h:162
med_idt
hid_t med_idt
Definition: med.h:326
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:79
MED_SNAME_SIZE
#define MED_SNAME_SIZE
Definition: med.h:80
med.h
med_bool
med_bool
Definition: med.h:257
med_geometry_type
int med_geometry_type
Definition: med.h:191
MED_ACC_RDONLY
Definition: med.h:118