json_value_clone_func Subroutine

Jacob Williams
10/31/2015
36 statements
Source File

private recursive subroutine json_value_clone_func(from, to, parent, previous, next, children, tail)

Recursive deep copy function called by json_clone.

Note

If new data is added to the json_value type, then this would need to be updated.

Arguments

Type	Optional	Attributes		Name
type(json_value),		pointer	::	from	this is the structure to clone
type(json_value),		pointer	::	to	the clone is put here (it must not already be associated)
type(json_value),	optional	pointer	::	parent	to%parent
type(json_value),	optional	pointer	::	previous	to%previous
type(json_value),	optional	pointer	::	next	to%next
type(json_value),	optional	pointer	::	children	to%children
logical,	optional		::	tail	if "to" is the tail of its parent's children

Called By

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Source Code

json_value_clone_func

Source Code

    recursive subroutine json_value_clone_func(from,to,parent,previous,next,children,tail)

    implicit none

    type(json_value),pointer          :: from     !! this is the structure to clone
    type(json_value),pointer          :: to       !! the clone is put here (it
                                                  !! must not already be associated)
    type(json_value),pointer,optional :: parent   !! to%parent
    type(json_value),pointer,optional :: previous !! to%previous
    type(json_value),pointer,optional :: next     !! to%next
    type(json_value),pointer,optional :: children !! to%children
    logical,optional                  :: tail     !! if "to" is the tail of
                                                  !! its parent's children

    nullify(to)

    if (associated(from)) then

        allocate(to)

        !copy over the data variables:
        ! [note: the allocate() statements don't work here for the
        !  deferred-length characters in gfortran-4.9]
        if (allocated(from%name))      to%name = from%name
        if (allocated(from%dbl_value)) allocate(to%dbl_value,source=from%dbl_value)
        if (allocated(from%log_value)) allocate(to%log_value,source=from%log_value)
        if (allocated(from%str_value)) to%str_value = from%str_value
        if (allocated(from%int_value)) allocate(to%int_value,source=from%int_value)
        to%var_type   = from%var_type
        to%n_children = from%n_children

        !allocate and associate the pointers as necessary:

        if (present(parent))      to%parent      => parent
        if (present(previous))    to%previous    => previous
        if (present(next))        to%next        => next
        if (present(children))    to%children    => children
        if (present(tail)) then
            if (tail) to%parent%tail => to
        end if

        if (associated(from%next)) then
            allocate(to%next)
            call json_value_clone_func(from%next,&
                                       to%next,&
                                       previous=to,&
                                       parent=to%parent,&
                                       tail=(.not. associated(from%next%next)))
        end if

        if (associated(from%children)) then
            allocate(to%children)
            call json_value_clone_func(from%children,&
                                       to%children,&
                                       parent=to,&
                                       tail=(.not. associated(from%children%next)))
        end if

    end if

    end subroutine json_value_clone_func

All Procedures

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