1: #define PETSC_USE_FORTRAN_MODULES 1

  3:  #include <petsc/finclude/petscsys.h>
  4:  #include <petsc/finclude/petscbag.h>
  5:  #include <petsc/finclude/petscviewer.h>

  7:       module Bag_data_module
  8: !     Data structure used to contain information about the problem
  9: !     You can add physical values etc here

 11:       type tuple
 12:          PetscReal:: x1,x2
 13:       end type tuple

 15:       type bag_data_type
 16:          PetscScalar :: x
 17:          PetscReal :: y
 18:          PetscInt  :: nxc
 19:          PetscReal :: rarray(3)
 20:          PetscBool  :: t
 21:          PetscBool  :: tarray(3)
 22:          PetscEnum :: enum
 23:          character*(80) :: c
 24:          type(tuple) :: pos
 25:       end type bag_data_type
 26:       end module Bag_data_module

 28:       module Bag_interface_module
 29:       use Bag_data_module

 31:       interface PetscBagGetData
 32:          subroutine PetscBagGetData(bag,data,ierr)
 33:            use Bag_data_module
 34:            PetscBag bag
 35:            type(bag_data_type),pointer :: data
 36:            PetscErrorCode ierr
 37:          end subroutine PetscBagGetData
 38:       end interface
 39:       end module Bag_interface_module

 41:       program ex5f90
 42:       use Bag_interface_module
 43:       use petsc
 44:       implicit none

 46:       PetscBag bag
 47:       PetscErrorCode ierr
 48:       type(bag_data_type), pointer :: data
 49:       type(bag_data_type)          :: dummydata
 50:       character(len=1),pointer     :: dummychar(:)
 51:       PetscViewer viewer
 52:       PetscSizeT sizeofbag
 53:       Character(len=99) list(6)
 54:       PetscInt three,int56
 55:       PetscReal value
 56:       PetscScalar svalue

 58:       Call PetscInitialize(PETSC_NULL_CHARACTER,ierr)
 59:       if (ierr .ne. 0) then
 60:          print*,'Unable to initialize PETSc'
 61:          stop
 62:       endif
 63:       list(1) = 'a123'
 64:       list(2) = 'b456'
 65:       list(3) = 'c789'
 66:       list(4) = 'list'
 67:       list(5) = 'prefix_'
 68:       list(6) = ''
 69: !     cannot just pass a 3 to PetscBagRegisterXXXArray() because it is expecting a PetscInt
 70:       three   = 3

 72: !   compute size of the data
 73: !
 74:       sizeofbag = size(transfer(dummydata,dummychar))


 77: ! create the bag
 78:       call PetscBagCreate(PETSC_COMM_WORLD,sizeofbag,bag,ierr);CHKERRA(ierr)
 79:       call PetscBagGetData(bag,data,ierr);CHKERRA(ierr)
 80:       call PetscBagSetName(bag,'demo parameters','super secret demo parameters in a bag',ierr);CHKERRA(ierr)
 81:       call PetscBagSetOptionsPrefix(bag, 'pbag_', ierr);CHKERRA(ierr)

 83: ! register the data within the bag, grabbing values from the options database
 84: !     Need to put the value into a variable for 64 bit indices
 85:       int56 = 56
 86:       call PetscBagRegisterInt(bag,data%nxc ,int56,'nxc','nxc_variable help message',ierr);CHKERRA(ierr)
 87:       call PetscBagRegisterRealArray(bag,data%rarray,three,'rarray','rarray help message',ierr);CHKERRA(ierr)
 88: !     Need to put the value into a variable to pass correctly for 128 bit quad precision numbers
 89:       svalue = 103.20
 90:       call PetscBagRegisterScalar(bag,data%x ,svalue,'x','x variable help message',ierr);CHKERRA(ierr)
 91:       call PetscBagRegisterBool(bag,data%t ,PETSC_TRUE,'t','t boolean help message',ierr);CHKERRA(ierr)
 92:       call PetscBagRegisterBoolArray(bag,data%tarray,three,'tarray','tarray help message',ierr);CHKERRA(ierr)
 93:       call PetscBagRegisterString(bag,data%c,'hello','c','string help message',ierr);CHKERRA(ierr)
 94:       value = -11.00
 95:       call PetscBagRegisterReal(bag,data%y ,value,'y','y variable help message',ierr);CHKERRA(ierr)
 96:       value = 1.00
 97:       call PetscBagRegisterReal(bag,data%pos%x1 ,value,'pos_x1','tuple value 1 help message',ierr);CHKERRA(ierr)
 98:       value = 2.00
 99:       call PetscBagRegisterReal(bag,data%pos%x2 ,value,'pos_x2','tuple value 2 help message',ierr);CHKERRA(ierr)
100:       call PetscBagRegisterEnum(bag,data%enum ,list,1,'enum','tuple value 2 help message',ierr);CHKERRA(ierr)
101:       call PetscBagView(bag,PETSC_VIEWER_STDOUT_WORLD,ierr);CHKERRA(ierr)

103:       data%nxc = 23
104:       data%rarray(1) = -1.0
105:       data%rarray(2) = -2.0
106:       data%rarray(3) = -3.0
107:       data%x   = 155.4
108:       data%c   = 'a whole new string'
109:       data%t   = PETSC_TRUE
110:       data%tarray   = (/PETSC_TRUE,PETSC_FALSE,PETSC_TRUE/)
111:       call PetscBagView(bag,PETSC_VIEWER_BINARY_WORLD,ierr);CHKERRA(ierr)

113:       call PetscViewerBinaryOpen(PETSC_COMM_WORLD,'binaryoutput',FILE_MODE_READ,viewer,ierr);CHKERRA(ierr)
114:       call PetscBagLoad(viewer,bag,ierr);CHKERRA(ierr)
115:       call PetscViewerDestroy(viewer,ierr);CHKERRA(ierr)
116:       call PetscBagView(bag,PETSC_VIEWER_STDOUT_WORLD,ierr);CHKERRA(ierr)

118:       call PetscBagSetFromOptions(bag,ierr);CHKERRA(ierr)
119:       call PetscBagView(bag,PETSC_VIEWER_STDOUT_WORLD,ierr);CHKERRA(ierr)
120:       call PetscBagDestroy(bag,ierr);CHKERRA(ierr)

122:       call PetscFinalize(ierr)
123:       end program ex5f90

125: !
126: !/*TEST
127: !
128: !   build:
129: !      requires: define(PETSC_USING_F2003) define(PETSC_USING_F90FREEFORM)
130: !
131: !   test:
132: !      args: -pbag_rarray 4,5,88
133: !
134: !TEST*/