parse_value Subroutine

private recursive subroutine parse_value(json, unit, str, value)

Core parsing routine.

Arguments

Type IntentOptional AttributesName
class(json_core), intent(inout) :: json
integer(kind=IK), intent(in) :: unit

file unit number

character(kind=CK,len=*), intent(in) :: str

string containing JSON data (only used if unit=0)

type(json_value), pointer:: value

JSON data that is extracted

Calls

proc~~parse_value~~CallsGraph proc~parse_value parse_value proc~to_array to_array proc~parse_value->proc~to_array proc~to_object to_object proc~parse_value->proc~to_object proc~to_null to_null proc~parse_value->proc~to_null proc~to_logical to_logical proc~parse_value->proc~to_logical proc~to_string to_string proc~parse_value->proc~to_string proc~destroy_json_data destroy_json_data proc~to_array->proc~destroy_json_data proc~to_object->proc~destroy_json_data proc~to_null->proc~destroy_json_data proc~to_logical->proc~destroy_json_data proc~to_string->proc~destroy_json_data
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Source Code


Source Code

    recursive subroutine parse_value(json, unit, str, value)

    implicit none

    class(json_core),intent(inout)      :: json
    integer(IK),intent(in)              :: unit   !! file unit number
    character(kind=CK,len=*),intent(in) :: str    !! string containing JSON data (only used if unit=0)
    type(json_value),pointer            :: value  !! JSON data that is extracted

    logical(LK)              :: eof !! end-of-file flag
    character(kind=CK,len=1) :: c   !! character read from file (or string)
#if defined __GFORTRAN__
    character(kind=CK,len=:),allocatable :: tmp  !! this is a work-around for a bug
                                                 !! in the gfortran 4.9 compiler.
#endif

    if (.not. json%exception_thrown) then

        !the routine is being called incorrectly.
        if (.not. associated(value)) then
            call json%throw_exception('Error in parse_value: value pointer not associated.')
        end if

        ! pop the next non whitespace character off the file
        call json%pop_char(unit, str=str, eof=eof, skip_ws=.true., &
                            skip_comments=json%allow_comments, popped=c)

        if (eof) then
            return
        else

            select case (c)

            case (start_object)

                ! start object
                call to_object(value)    !allocate class
                call json%parse_object(unit, str, value)

            case (start_array)

                ! start array
                call to_array(value)    !allocate class
                call json%parse_array(unit, str, value)

            case (end_array)

                ! end an empty array
                call json%push_char(c)
                nullify(value)

            case (quotation_mark)

                ! string
                call to_string(value)    !allocate class

                select case (value%var_type)
                case (json_string)
#if defined __GFORTRAN__
                    ! write to a tmp variable because of
                    ! a bug in 4.9 gfortran compiler.
                    call json%parse_string(unit,str,tmp)
                    value%str_value = tmp
                    if (allocated(tmp))  deallocate(tmp)
#else
                    call json%parse_string(unit,str,value%str_value)
#endif
                end select

            case (CK_'t') !true_str(1:1) gfortran bug work around

                !true
                call json%parse_for_chars(unit, str, true_str(2:))
                !allocate class and set value:
                if (.not. json%exception_thrown) call to_logical(value,.true.)

            case (CK_'f') !false_str(1:1) gfortran bug work around

                !false
                call json%parse_for_chars(unit, str, false_str(2:))
                !allocate class and set value:
                if (.not. json%exception_thrown) call to_logical(value,.false.)

            case (CK_'n') !null_str(1:1) gfortran bug work around

                !null
                call json%parse_for_chars(unit, str, null_str(2:))
                if (.not. json%exception_thrown) call to_null(value)    !allocate class

            case(CK_'-', CK_'0': CK_'9')

                call json%push_char(c)
                call json%parse_number(unit, str, value)

            case default

                call json%throw_exception('Error in parse_value:'//&
                                     ' Unexpected character while parsing value. "'//&
                                     c//'"')

            end select
        end if

    end if

    end subroutine parse_value


annotate_invalid_json compact_real_string convert decode_rfc6901 default_comp_ucs4 default_join_ucs4 default_neq_ucs4 destroy_json_core destroy_json_data encode_rfc6901 escape_string get_current_line_from_file_sequential get_current_line_from_file_stream get_json_core_in_file initialize_json_core initialize_json_core_in_file initialize_json_file initialize_json_file_v2 integer_to_string json_add_double_by_path json_add_double_vec_by_path json_add_integer_by_path json_add_integer_vec_by_path json_add_logical_by_path json_add_logical_vec_by_path json_add_member_by_path json_add_string_by_path json_add_string_by_path_path_ascii json_add_string_by_path_value_ascii json_add_string_vec_by_path json_add_string_vec_by_path_path_ascii json_add_string_vec_by_path_value_ascii json_check_all_for_duplicate_keys json_check_children_for_duplicate_keys json_check_for_errors json_clear_exceptions json_clone json_core json_count json_create_by_path json_failed json_file json_file_add_double json_file_add_double_vec json_file_add_integer json_file_add_integer_vec json_file_add_logical json_file_add_logical_vec json_file_add_object json_file_add_string json_file_add_string_path_ascii json_file_add_string_value_ascii json_file_add_string_vec json_file_add_string_vec_path_ascii json_file_add_string_vec_vec_ascii json_file_check_for_errors json_file_clear_exceptions json_file_destroy json_file_failed json_file_get_alloc_string_vec json_file_get_double json_file_get_double_vec json_file_get_integer json_file_get_integer_vec json_file_get_logical json_file_get_logical_vec json_file_get_object json_file_get_root json_file_get_string json_file_get_string_vec json_file_load json_file_load_from_string json_file_move_pointer json_file_print_1 json_file_print_2 json_file_print_error_message json_file_print_to_console json_file_print_to_string json_file_rename json_file_rename_name_ascii json_file_rename_path_ascii json_file_traverse json_file_update_integer json_file_update_logical 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json_print_error_message json_rename_by_path json_rename_by_path_name_ascii json_rename_by_path_path_ascii json_string_info json_throw_exception json_traverse json_update_double json_update_integer json_update_logical json_update_string json_update_string_name_ascii json_update_string_val_ascii json_valid_path json_value_add_double json_value_add_double_vec json_value_add_integer json_value_add_integer_vec json_value_add_logical json_value_add_logical_vec json_value_add_member json_value_add_null json_value_add_string json_value_add_string_name_ascii json_value_add_string_val_ascii json_value_add_string_vec json_value_add_string_vec_name_ascii json_value_add_string_vec_val_ascii json_value_clone_func json_value_create json_value_create_array json_value_create_double json_value_create_integer json_value_create_logical json_value_create_null json_value_create_object json_value_create_string json_value_destroy json_value_get_child json_value_get_child_by_index json_value_get_child_by_name json_value_insert_after json_value_insert_after_child_by_index json_value_is_child_of json_value_print json_value_remove json_value_remove_if_present json_value_rename json_value_replace json_value_reverse json_value_swap json_value_to_string json_value_validate lowercase_string name_equal name_strings_equal parse_array parse_for_chars parse_number parse_object parse_string parse_value pop_char push_char real_to_string replace_string set_json_core_in_file string_to_dble string_to_int string_to_integer string_to_real to_array to_double to_integer to_logical to_null to_object to_string to_uni to_uni_vec to_unicode ucs4_comp_default ucs4_join_default ucs4_neq_default unescape_string valid_json_hex wrap_json_add_double_by_path wrap_json_add_double_vec_by_path wrap_json_add_integer_by_path wrap_json_add_integer_vec_by_path wrap_json_add_logical_by_path wrap_json_add_logical_vec_by_path wrap_json_add_member_by_path wrap_json_add_string_by_path wrap_json_add_string_vec_by_path 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