Actual source code: ex1f.F90

petsc-3.12.2 2019-11-22
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  1: !
  2: !
  3: !  Formatted test for IS general routines
  4: !
  5:       program main
  6:  #include <petsc/finclude/petscis.h>
  7:       use petscis
  8:       implicit none

 10:        PetscErrorCode ierr
 11:        PetscInt i,n,indices(1000),ii(1)
 12:        PetscMPIInt size,rank
 13:        PetscOffset iis
 14:        IS          is,newis
 15:        PetscBool   flag

 17:        call PetscInitialize(PETSC_NULL_CHARACTER,ierr)
 18:        if (ierr .ne. 0) then
 19:          print*,'Unable to initialize PETSc'
 20:          stop
 21:        endif
 22:        call MPI_Comm_rank(PETSC_COMM_WORLD,rank,ierr)
 23:        call MPI_Comm_size(PETSC_COMM_WORLD,size,ierr)

 25: !     Test IS of size 0

 27:        n = 0
 28:        call ISCreateGeneral(PETSC_COMM_SELF,n,indices,PETSC_COPY_VALUES,is,ierr);CHKERRA(ierr);
 29:        call ISGetLocalSize(is,n,ierr);CHKERRA(ierr);
 30:        if (n .ne. 0) then; SETERRA(PETSC_COMM_SELF,1,'Error getting size of zero IS'); endif
 31:        call ISDestroy(is,ierr)


 34: !     Create large IS and test ISGetIndices(,ierr)
 35: !     fortran indices start from 1 - but IS indices start from 0
 36:       n = 1000
 37:       do 10, i=1,n
 38:         indices(i) = i-1
 39:  10   continue
 40:       call ISCreateGeneral(PETSC_COMM_SELF,n,indices,PETSC_COPY_VALUES,is,ierr);CHKERRA(ierr)
 41:       call ISGetIndices(is,ii,iis,ierr);CHKERRA(ierr)
 42:       do 20, i=1,n
 43:         if (ii(i+iis) .ne. indices(i)) then; SETERRA(PETSC_COMM_SELF,1,'Error getting indices'); endif
 44:  20   continue
 45:       call ISRestoreIndices(is,ii,iis,ierr);CHKERRA(ierr)

 47: !     Check identity and permutation

 49:       call ISPermutation(is,flag,ierr);CHKERRA(ierr)
 50:       if (flag) then; SETERRA(PETSC_COMM_SELF,1,'Error checking permutation'); endif
 51:       call ISIdentity(is,flag,ierr);CHKERRA(ierr)
 52:       if (.not. flag) then; SETERRA(PETSC_COMM_SELF,1,'Error checking identity'); endif
 53:       call ISSetPermutation(is,ierr);CHKERRA(ierr)
 54:       call ISSetIdentity(is,ierr);CHKERRA(ierr)
 55:       call ISPermutation(is,flag,ierr);CHKERRA(ierr)
 56:       if (.not. flag) then; SETERRA(PETSC_COMM_SELF,1,'Error checking permutation second time'); endif
 57:       call ISIdentity(is,flag,ierr);CHKERRA(ierr)
 58:       if (.not. flag) then; SETERRA(PETSC_COMM_SELF,1,'Error checking identity second time'); endif

 60: !     Check equality of index sets

 62:       call ISEqual(is,is,flag,ierr);CHKERRA(ierr)
 63:       if (.not. flag) then; SETERRA(PETSC_COMM_SELF,1,'Error checking equal'); endif

 65: !     Sorting

 67:       call ISSort(is,ierr);CHKERRA(ierr)
 68:       call ISSorted(is,flag,ierr);CHKERRA(ierr)
 69:       if (.not. flag) then; SETERRA(PETSC_COMM_SELF,1,'Error checking sorted'); endif

 71: !     Thinks it is a different type?

 73:       call PetscObjectTypeCompare(is,ISSTRIDE,flag,ierr);CHKERRA(ierr)
 74:       if (flag) then; SETERRA(PETSC_COMM_SELF,1,'Error checking stride'); endif
 75:       call PetscObjectTypeCompare(is,ISBLOCK,flag,ierr);CHKERRA(ierr)
 76:       if (flag) then; SETERRA(PETSC_COMM_SELF,1,'Error checking block'); endif

 78:       call ISDestroy(is,ierr);CHKERRA(ierr)

 80: !     Inverting permutation

 82:       do 30, i=1,n
 83:         indices(i) = n - i
 84:  30   continue

 86:       call ISCreateGeneral(PETSC_COMM_SELF,n,indices,PETSC_COPY_VALUES,is,ierr);CHKERRA(ierr)
 87:       call ISSetPermutation(is,ierr);CHKERRA(ierr)
 88:       call ISInvertPermutation(is,PETSC_DECIDE,newis,ierr);CHKERRA(ierr)
 89:       call ISGetIndices(newis,ii,iis,ierr);CHKERRA(ierr)
 90:       do 40, i=1,n
 91:         if (ii(iis+i) .ne. n - i) then; SETERRA(PETSC_COMM_SELF,1,'Error getting permutation indices'); endif
 92:  40   continue
 93:       call ISRestoreIndices(newis,ii,iis,ierr);CHKERRA(ierr)
 94:       call ISDestroy(newis,ierr);CHKERRA(ierr)
 95:       call ISDestroy(is,ierr);CHKERRA(ierr)
 96:       call PetscFinalize(ierr)
 97:       end

 99: !/*TEST
100: !
101: !   test:
102: !     output_file: output/ex1_1.out
103: !
104: !TEST*/