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UsesCase_MEDfield_8.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 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;
44 med_geometry_type *geotypes = MED_GET_CELL_GEOMETRY_TYPE;
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,
118 MED_FULL_INTERLACE, MED_ALL_CONSTITUENT,
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_FULL_INTERLACE
Definition: med.h:96
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
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
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
main
int main(int argc, char **argv)
Definition: UsesCase_MEDfield_8.c:29
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