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.\n\n";

 9:  #include petscis.h

 13: int main(int argc,char **argv)
 14: {
 15:   int        i,n,ierr,*ii,start,stride;
 16:   IS         is;
 17:   PetscTruth flg;

 19:   PetscInitialize(&argc,&argv,(char*)0,help);

 21:   /*
 22:      Test IS of size 0 
 23:   */
 24:   ISCreateStride(PETSC_COMM_SELF,0,0,2,&is);
 25:   ISGetSize(is,&n);
 26:   if (n != 0) SETERRQ(1,"ISCreateStride");
 27:   ISStrideGetInfo(is,&start,&stride);
 28:   if (start != 0) SETERRQ(1,"ISStrideGetInfo");
 29:   if (stride != 2) SETERRQ(1,"ISStrideGetInfo");
 30:   ISStride(is,&flg);
 31:   if (flg != PETSC_TRUE) SETERRQ(1,"ISStride");
 32:   ISGetIndices(is,&ii);
 33:   ISRestoreIndices(is,&ii);
 34:   ISDestroy(is);

 36:   /*
 37:      Test ISGetIndices()
 38:   */
 39:   ISCreateStride(PETSC_COMM_SELF,10000,-8,3,&is);
 40:   ISGetLocalSize(is,&n);
 41:   ISGetIndices(is,&ii);
 42:   for (i=0; i<10000; i++) {
 43:     if (ii[i] != -8 + 3*i) SETERRQ(1,"ISGetIndices");
 44:   }
 45:   ISRestoreIndices(is,&ii);
 46:   ISDestroy(is);

 48:   PetscFinalize();
 49:   return 0;
 50: }
 51: