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UsesCase_MEDinterp_2.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 /*
19  * Interp use case 2 : read an interpolation family with a direct access by name
20  * In this example, the interpolation family can be used with
21  * the TEMPERATURE field of UsesCase_MEDfield_10 use case
22  */
23 
24 #include <med.h>
25 #define MESGERR 1
26 #include <med_utils.h>
27 
28 #include <string.h>
29 
30 int main (int argc, char **argv) {
31  med_idt fid;
32  const char interpname[MED_NAME_SIZE+1] = "MED_TRIA3 interpolation family";
33  med_geometry_type geotype =MED_NONE;
34  med_bool cellnodes =MED_FALSE;
35  med_int nbasisfunc =0;
36  med_int nvariable =0;
37  med_int maxdegree =0;
38  med_int nmaxcoefficient =0;
39  int basisfuncit =0;
40  int powerit =0;
41  med_int ncoefficient =0;
42  med_int* power =NULL;
43  med_float* coefficient =NULL;
44  int coefficientit =0;
45  int ret=-1;
46 
47 
48  /* file creation */
49  fid = MEDfileOpen("UsesCase_MEDinterp_1.med",MED_ACC_RDONLY);
50  if (fid < 0) {
51  MESSAGE("ERROR : file creation ...");
52  goto ERROR;
53  }
54 
55  /* with direct access by the family name */
56  if (MEDinterpInfoByName(fid,interpname,&geotype,&cellnodes,&nbasisfunc,
57  &nvariable,&maxdegree,&nmaxcoefficient) < 0) {
58  MESSAGE("ERROR : interpolation function information ...");
59  goto ERROR;
60  }
61 
62  /* read each basis function */
63  for ( basisfuncit=1; basisfuncit<= nbasisfunc; ++basisfuncit) {
64 
65  if ((ncoefficient = MEDinterpBaseFunctionCoefSize(fid,interpname,basisfuncit) ) <0 ) {
66  MESSAGE("ERROR : read number of coefficient in the base function ...");
67  goto ERROR;
68  }
69 
70  coefficient = (med_float*) calloc(sizeof(med_float),ncoefficient);
71  power = (med_int*) calloc(sizeof(med_int),nvariable*ncoefficient);
72 
73  if (MEDinterpBaseFunctionRd(fid,interpname,basisfuncit,&ncoefficient,power,coefficient) < 0) {
74  MESSAGE("ERROR : read base function ...");
75  free(coefficient); free(power);
76  goto ERROR;
77  }
78 
79  free(coefficient);
80  free(power);
81  }
82 
83  ret=0;
84  ERROR:
85 
86 
87  /* close file */
88  if (MEDfileClose(fid) < 0) {
89  MESSAGE("ERROR : close file ...");
90  ret=-1;
91  }
92 
93  return ret;
94 }
MED_ACC_RDONLY
Definition: med.h:122
med_geometry_type
int med_geometry_type
Definition: med.h:196
med_idt
hid_t med_idt
Definition: med.h:333
MED_FALSE
Definition: med.h:262
MEDinterpInfoByName
MEDC_EXPORT med_err MEDinterpInfoByName(const med_idt fid, const char *const interpname, med_geometry_type *const geotype, med_bool *const cellnode, med_int *const nbasisfunc, med_int *const nvariable, med_int *const maxdegree, med_int *const nmaxcoef)
Cette fonction informe des caractéristiques de la fonction d'interpolation nommée interpname.
Definition: MEDinterpInfoByName.c:41
MESSAGE
#define MESSAGE(chaine)
Definition: med_utils.h:324
med_int
int med_int
Definition: med.h:344
med_bool
med_bool
Definition: med.h:262
med_float
double med_float
Definition: med.h:338
MED_NONE
#define MED_NONE
Definition: med.h:233
MEDfileClose
MEDC_EXPORT med_err MEDfileClose(med_idt fid)
Fermeture d'un fichier MED.
Definition: MEDfileClose.c:30
MED_NAME_SIZE
#define MED_NAME_SIZE
Definition: med.h:83
main
int main(int argc, char **argv)
Definition: UsesCase_MEDinterp_2.c:30
med_utils.h
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
MEDinterpBaseFunctionRd
MEDC_EXPORT med_err MEDinterpBaseFunctionRd(const med_idt fid, const char *const interpname, const int basisfuncit, med_int *const ncoef, med_int *const power, med_float *const coefficient)
Cette routine permet la lecture d'une fonction de base/forme de l'interpolation interpname.
Definition: MEDinterpBaseFunctionRd.c:41
MEDinterpBaseFunctionCoefSize
MEDC_EXPORT med_int MEDinterpBaseFunctionCoefSize(const med_idt fid, const char *const interpname, const med_int basisfuncit)
Cette routine retourne ne nombre de coefficients/monômes de la fonction de base/forme n° basisfunctit...
Definition: MEDinterpBaseFunctionCoeffSize.c:37