parse_value_recursive Subroutine

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

Core parsing routine. This is the original recursive routine.

Arguments

Type IntentOptional Attributes Name
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_recursive~~CallsGraph proc~parse_value_recursive parse_value_recursive none~throw_exception json_core%throw_exception proc~parse_value_recursive->none~throw_exception proc~parse_array json_core%parse_array proc~parse_value_recursive->proc~parse_array proc~parse_for_chars json_core%parse_for_chars proc~parse_value_recursive->proc~parse_for_chars proc~parse_number json_core%parse_number proc~parse_value_recursive->proc~parse_number proc~parse_object json_core%parse_object proc~parse_value_recursive->proc~parse_object proc~parse_string json_core%parse_string proc~parse_value_recursive->proc~parse_string proc~pop_char json_core%pop_char proc~parse_value_recursive->proc~pop_char proc~push_char json_core%push_char proc~parse_value_recursive->proc~push_char proc~to_array json_core%to_array proc~parse_value_recursive->proc~to_array proc~to_logical json_core%to_logical proc~parse_value_recursive->proc~to_logical proc~to_null json_core%to_null proc~parse_value_recursive->proc~to_null proc~to_object json_core%to_object proc~parse_value_recursive->proc~to_object proc~to_string json_core%to_string proc~parse_value_recursive->proc~to_string proc~json_throw_exception json_core%json_throw_exception none~throw_exception->proc~json_throw_exception proc~parse_array->none~throw_exception proc~parse_array->proc~pop_char none~add~2 json_core%add proc~parse_array->none~add~2 none~destroy~3 json_core%destroy proc~parse_array->none~destroy~3 proc~json_value_create json_value_create proc~parse_array->proc~json_value_create proc~parse_for_chars->none~throw_exception proc~parse_for_chars->proc~pop_char proc~parse_number->proc~pop_char proc~parse_number->proc~push_char proc~json_clear_exceptions json_core%json_clear_exceptions proc~parse_number->proc~json_clear_exceptions proc~string_to_dble json_core%string_to_dble proc~parse_number->proc~string_to_dble proc~string_to_int json_core%string_to_int proc~parse_number->proc~string_to_int proc~to_integer json_core%to_integer proc~parse_number->proc~to_integer proc~to_real json_core%to_real proc~parse_number->proc~to_real proc~parse_object->none~throw_exception proc~parse_object->proc~parse_object proc~parse_object->proc~parse_string proc~parse_object->proc~pop_char proc~parse_object->none~add~2 proc~parse_object->none~destroy~3 proc~parse_object->proc~json_value_create proc~parse_string->none~throw_exception proc~parse_string->proc~pop_char proc~unescape_string unescape_string proc~parse_string->proc~unescape_string proc~push_char->none~throw_exception proc~integer_to_string integer_to_string proc~push_char->proc~integer_to_string proc~destroy_json_data destroy_json_data proc~to_array->proc~destroy_json_data proc~to_logical->proc~destroy_json_data proc~to_null->proc~destroy_json_data proc~to_object->proc~destroy_json_data proc~to_string->proc~destroy_json_data proc~json_value_add_integer json_core%json_value_add_integer none~add~2->proc~json_value_add_integer proc~json_value_add_integer_vec json_core%json_value_add_integer_vec none~add~2->proc~json_value_add_integer_vec proc~json_value_add_logical json_core%json_value_add_logical none~add~2->proc~json_value_add_logical proc~json_value_add_logical_vec json_core%json_value_add_logical_vec none~add~2->proc~json_value_add_logical_vec proc~json_value_add_member json_core%json_value_add_member none~add~2->proc~json_value_add_member proc~json_value_add_null json_core%json_value_add_null none~add~2->proc~json_value_add_null proc~json_value_add_real json_core%json_value_add_real none~add~2->proc~json_value_add_real proc~json_value_add_real32 json_core%json_value_add_real32 none~add~2->proc~json_value_add_real32 proc~json_value_add_real32_vec json_core%json_value_add_real32_vec none~add~2->proc~json_value_add_real32_vec proc~json_value_add_real_vec json_core%json_value_add_real_vec none~add~2->proc~json_value_add_real_vec proc~json_value_add_string json_core%json_value_add_string none~add~2->proc~json_value_add_string proc~json_value_add_string_vec json_core%json_value_add_string_vec none~add~2->proc~json_value_add_string_vec proc~destroy_json_core json_core%destroy_json_core none~destroy~3->proc~destroy_json_core proc~json_value_destroy json_core%json_value_destroy none~destroy~3->proc~json_value_destroy proc~string_to_dble->none~throw_exception proc~string_to_int->none~throw_exception proc~string_to_integer string_to_integer proc~string_to_int->proc~string_to_integer proc~to_integer->proc~destroy_json_data proc~to_real->proc~destroy_json_data proc~valid_json_hex valid_json_hex proc~unescape_string->proc~valid_json_hex proc~json_value_add_integer->none~add~2 none~create_integer json_core%create_integer proc~json_value_add_integer->none~create_integer proc~json_value_add_integer_vec->none~add~2 none~create_array json_core%create_array proc~json_value_add_integer_vec->none~create_array proc~json_value_add_logical->none~add~2 none~create_logical json_core%create_logical proc~json_value_add_logical->none~create_logical proc~json_value_add_logical_vec->none~add~2 proc~json_value_add_logical_vec->none~create_array proc~json_value_add_member->none~throw_exception proc~json_value_add_null->none~add~2 none~create_null json_core%create_null proc~json_value_add_null->none~create_null proc~json_value_add_real->none~add~2 none~create_real~2 json_core%create_real proc~json_value_add_real->none~create_real~2 proc~json_value_add_real32->none~add~2 proc~json_value_add_real32_vec->none~add~2 proc~json_value_add_real_vec->none~add~2 proc~json_value_add_real_vec->none~create_array proc~json_value_add_string->none~add~2 none~create_string json_core%create_string proc~json_value_add_string->none~create_string proc~json_value_add_string_vec->none~add~2 proc~json_value_add_string_vec->none~create_array proc~json_value_destroy->none~destroy~3 proc~json_value_destroy->proc~destroy_json_data proc~json_value_create_array json_core%json_value_create_array none~create_array->proc~json_value_create_array proc~json_value_create_integer json_core%json_value_create_integer none~create_integer->proc~json_value_create_integer proc~json_value_create_logical json_core%json_value_create_logical none~create_logical->proc~json_value_create_logical proc~json_value_create_null json_core%json_value_create_null none~create_null->proc~json_value_create_null proc~json_value_create_real32 json_core%json_value_create_real32 none~create_real~2->proc~json_value_create_real32 proc~json_value_create_string json_core%json_value_create_string none~create_string->proc~json_value_create_string proc~json_value_create_array->proc~to_array proc~json_value_create_array->proc~json_value_create proc~json_value_create_integer->proc~json_value_create proc~json_value_create_integer->proc~to_integer proc~json_value_create_logical->proc~to_logical proc~json_value_create_logical->proc~json_value_create proc~json_value_create_null->proc~to_null proc~json_value_create_null->proc~json_value_create proc~json_value_create_real32->none~create_real~2 proc~json_value_create_string->proc~to_string proc~json_value_create_string->proc~json_value_create

Source Code

    recursive subroutine parse_value_recursive(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) by [[pop_char]]
#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.')
            return
        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, c=c)

        if (eof) then
            return
        else

            select case (c)

            case (start_object)

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

            case (start_array)

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

            case (end_array)

                ! end an empty array
                call json%push_char(c)
                if (associated(value)) then
                    deallocate(value)
                    nullify(value)
                end if

            case (quotation_mark)

                ! string
                call json%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 json%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 json%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 json%to_null(value) ! allocate class

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

                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_recursive