xref: /petsc/src/vec/is/tests/ex1.c (revision 327415f76d85372a4417cf1aaa14db707d4d6c04)
1c4762a1bSJed Brown 
2c4762a1bSJed Brown static char help[]= "Tests ISLocalToGlobalMappingCreateIS() for bs > 1.\n\n";
3c4762a1bSJed Brown 
4c4762a1bSJed Brown #include <petscis.h>
5c4762a1bSJed Brown #include <petscviewer.h>
6c4762a1bSJed Brown 
7c4762a1bSJed Brown int main(int argc,char **argv)
8c4762a1bSJed Brown {
9c4762a1bSJed Brown   PetscInt               bs = 2,n = 3,ix[3] = {1,7,9},iy[2] = {0,2},mp[2];
10c4762a1bSJed Brown   IS                     isx;
11c4762a1bSJed Brown   ISLocalToGlobalMapping ltog;
12c4762a1bSJed Brown 
13*327415f7SBarry Smith   PetscFunctionBeginUser;
149566063dSJacob Faibussowitsch   PetscCall(PetscInitialize(&argc,&argv,(char*)0,help));
15c4762a1bSJed Brown 
169566063dSJacob Faibussowitsch   PetscCall(ISCreateBlock(PETSC_COMM_SELF,bs,n,ix,PETSC_COPY_VALUES,&isx));
179566063dSJacob Faibussowitsch   PetscCall(ISLocalToGlobalMappingCreateIS(isx,&ltog));
18c4762a1bSJed Brown 
199566063dSJacob Faibussowitsch   PetscCall(PetscIntView(2,iy,PETSC_VIEWER_STDOUT_WORLD));
209566063dSJacob Faibussowitsch   PetscCall(ISLocalToGlobalMappingApply(ltog,2,iy,mp));
219566063dSJacob Faibussowitsch   PetscCall(PetscIntView(2,mp,PETSC_VIEWER_STDOUT_WORLD));
22c4762a1bSJed Brown 
239566063dSJacob Faibussowitsch   PetscCall(PetscIntView(2,iy,PETSC_VIEWER_STDOUT_WORLD));
249566063dSJacob Faibussowitsch   PetscCall(ISLocalToGlobalMappingApplyBlock(ltog,2,iy,mp));
259566063dSJacob Faibussowitsch   PetscCall(PetscIntView(2,mp,PETSC_VIEWER_STDOUT_WORLD));
26c4762a1bSJed Brown 
279566063dSJacob Faibussowitsch   PetscCall(ISLocalToGlobalMappingDestroy(&ltog));
289566063dSJacob Faibussowitsch   PetscCall(ISDestroy(&isx));
29c4762a1bSJed Brown 
309566063dSJacob Faibussowitsch   PetscCall(PetscFinalize());
31b122ec5aSJacob Faibussowitsch   return 0;
32c4762a1bSJed Brown }
33c4762a1bSJed Brown 
34c4762a1bSJed Brown /*TEST
35c4762a1bSJed Brown 
36c4762a1bSJed Brown    test:
37c4762a1bSJed Brown 
38c4762a1bSJed Brown TEST*/
39