xref: /petsc/src/vec/is/tests/ex1.c (revision 9566063d113dddea24716c546802770db7481bc0)
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*9566063dSJacob Faibussowitsch   PetscCall(PetscInitialize(&argc,&argv,(char*)0,help));
14c4762a1bSJed Brown 
15*9566063dSJacob Faibussowitsch   PetscCall(ISCreateBlock(PETSC_COMM_SELF,bs,n,ix,PETSC_COPY_VALUES,&isx));
16*9566063dSJacob Faibussowitsch   PetscCall(ISLocalToGlobalMappingCreateIS(isx,&ltog));
17c4762a1bSJed Brown 
18*9566063dSJacob Faibussowitsch   PetscCall(PetscIntView(2,iy,PETSC_VIEWER_STDOUT_WORLD));
19*9566063dSJacob Faibussowitsch   PetscCall(ISLocalToGlobalMappingApply(ltog,2,iy,mp));
20*9566063dSJacob Faibussowitsch   PetscCall(PetscIntView(2,mp,PETSC_VIEWER_STDOUT_WORLD));
21c4762a1bSJed Brown 
22*9566063dSJacob Faibussowitsch   PetscCall(PetscIntView(2,iy,PETSC_VIEWER_STDOUT_WORLD));
23*9566063dSJacob Faibussowitsch   PetscCall(ISLocalToGlobalMappingApplyBlock(ltog,2,iy,mp));
24*9566063dSJacob Faibussowitsch   PetscCall(PetscIntView(2,mp,PETSC_VIEWER_STDOUT_WORLD));
25c4762a1bSJed Brown 
26*9566063dSJacob Faibussowitsch   PetscCall(ISLocalToGlobalMappingDestroy(&ltog));
27*9566063dSJacob Faibussowitsch   PetscCall(ISDestroy(&isx));
28c4762a1bSJed Brown 
29*9566063dSJacob Faibussowitsch   PetscCall(PetscFinalize());
30b122ec5aSJacob Faibussowitsch   return 0;
31c4762a1bSJed Brown }
32c4762a1bSJed Brown 
33c4762a1bSJed Brown /*TEST
34c4762a1bSJed Brown 
35c4762a1bSJed Brown    test:
36c4762a1bSJed Brown 
37c4762a1bSJed Brown TEST*/
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