Actual source code: ex2.c
1: /*$Id: ex2.c,v 1.21 2001/04/10 19:34:49 bsmith Exp $*/
3: /*
4: Formatted test for ISStride routines.
5: */
7: static char help[] = "Tests IS stride routines.nn";
9: #include petscis.h
11: int main(int argc,char **argv)
12: {
13: int i,n,ierr,*ii,start,stride;
14: IS is;
15: PetscTruth flg;
17: PetscInitialize(&argc,&argv,(char*)0,help);
19: /*
20: Test IS of size 0
21: */
22: ISCreateStride(PETSC_COMM_SELF,0,0,2,&is);
23: ISGetSize(is,&n);
24: if (n != 0) SETERRQ(1,"ISCreateStride");
25: ISStrideGetInfo(is,&start,&stride);
26: if (start != 0) SETERRQ(1,"ISStrideGetInfo");
27: if (stride != 2) SETERRQ(1,"ISStrideGetInfo");
28: ISStride(is,&flg);
29: if (flg != PETSC_TRUE) SETERRQ(1,"ISStride");
30: ISGetIndices(is,&ii);
31: ISRestoreIndices(is,&ii);
32: ISDestroy(is);
34: /*
35: Test ISGetIndices()
36: */
37: ISCreateStride(PETSC_COMM_SELF,10000,-8,3,&is);
38: ISGetLocalSize(is,&n);
39: ISGetIndices(is,&ii);
40: for (i=0; i<10000; i++) {
41: if (ii[i] != -8 + 3*i) SETERRQ(1,"ISGetIndices");
42: }
43: ISRestoreIndices(is,&ii);
44: ISDestroy(is);
46: PetscFinalize();
47: return 0;
48: }
49: