json_check_all_for_duplicate_keys Subroutine

private subroutine json_check_all_for_duplicate_keys(json, p, has_duplicate, name, path)

Checks a JSON structure for duplicate child names. This one recursively traverses the entire structure (calling json_check_children_for_duplicate_keys recursively for each element).

Arguments

TypeIntentOptionalAttributesName
class(json_core), intent(inout) :: json
type(json_value), intent(in), pointer:: p

the object to search. If p is not a json_object, then has_duplicate will be false.

logical(kind=LK), intent(out) :: has_duplicate

true if there is at least one duplicate name key anywhere in the structure.

character(kind=CK,len=:), intent(out), optional allocatable:: name

the duplicate name (unallocated if no duplicates were found)

character(kind=CK,len=:), intent(out), optional allocatable:: path

the full path to the duplicate name (unallocated if no duplicate was found)


Contents


Source Code

    subroutine json_check_all_for_duplicate_keys(json,p,has_duplicate,name,path)

    implicit none

    class(json_core),intent(inout) :: json
    type(json_value),pointer,intent(in) :: p  !! the object to search. If `p` is
                                              !! not a `json_object`, then `has_duplicate`
                                              !! will be false.
    logical(LK),intent(out) :: has_duplicate  !! true if there is at least
                                              !! one duplicate `name` key anywhere
                                              !! in the structure.
    character(kind=CK,len=:),allocatable,intent(out),optional :: name !! the duplicate name
                                                                      !! (unallocated if no
                                                                      !! duplicates were found)
    character(kind=CK,len=:),allocatable,intent(out),optional :: path !! the full path to the
                                                                      !! duplicate name
                                                                      !! (unallocated if no
                                                                      !! duplicate was found)

    has_duplicate = .false.
    if (.not. json%exception_thrown) then
        call json%traverse(p,duplicate_key_func)
    end if

    contains

        subroutine duplicate_key_func(json,p,finished)

        !! Callback function to check each element
        !! for duplicate child names.

        implicit none

        class(json_core),intent(inout)      :: json
        type(json_value),pointer,intent(in) :: p
        logical(LK),intent(out)             :: finished

#if defined __GFORTRAN__

        ! this is a workaround for a gfortran bug (6 and 7),

        character(kind=CK,len=:),allocatable :: tmp_name !! temp variable for `name` string
        character(kind=CK,len=:),allocatable :: tmp_path !! temp variable for `path` string

        if (present(name) .and. present(path)) then
            call json%check_children_for_duplicate_keys(p,has_duplicate,name=tmp_name,path=tmp_path)
        else if (present(name) .and. .not. present(path)) then
            call json%check_children_for_duplicate_keys(p,has_duplicate,name=tmp_name)
        else if (.not. present(name) .and. present(path)) then
            call json%check_children_for_duplicate_keys(p,has_duplicate,path=tmp_path)
        else
            call json%check_children_for_duplicate_keys(p,has_duplicate)
        end if

        if (has_duplicate) then
            if (present(name)) name = tmp_name
            if (present(path)) path = tmp_path
        end if

#else
        call json%check_children_for_duplicate_keys(p,has_duplicate,name,path)
#endif

        finished = has_duplicate .or. json%exception_thrown

        end subroutine duplicate_key_func

    end subroutine json_check_all_for_duplicate_keys