xref: /petsc/src/vec/is/tests/ex1.c (revision d71ae5a4db6382e7f06317b8d368875286fe9008)
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 
7*d71ae5a4SJacob Faibussowitsch int main(int argc, char **argv)
8*d71ae5a4SJacob Faibussowitsch {
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 
13327415f7SBarry 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*/
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