parse_object Subroutine

private recursive subroutine parse_object(json, unit, str, parent, expecting_next_element)

Core parsing routine.

Type Bound

json_core

Arguments

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

file unit number (if parsing from a file)
character(kind=CK, len=*), intent(in) :: str

JSON string (if parsing from a string)
type(json_value), pointer :: parent

the parsed object will be added as a child of this
logical(kind=LK), intent(in) :: expecting_next_element

if true, this object is preceeded by a comma, so we expect a valid object to exist. used to check for trailing delimiters.

Calls

proc~~parse_object~~CallsGraph proc~parse_object json_core%parse_object proc~parse_object->proc~parse_object none~add~4 json_core%add proc~parse_object->none~add~4 none~destroy~3 json_core%destroy proc~parse_object->none~destroy~3 none~throw_exception json_core%throw_exception proc~parse_object->none~throw_exception proc~json_value_create json_value_create proc~parse_object->proc~json_value_create proc~parse_string json_core%parse_string proc~parse_object->proc~parse_string proc~parse_value json_core%parse_value proc~parse_object->proc~parse_value proc~pop_char json_core%pop_char proc~parse_object->proc~pop_char proc~json_value_add_string_name_ascii json_core%json_value_add_string_name_ascii none~add~4->proc~json_value_add_string_name_ascii proc~json_value_add_string_val_ascii json_core%json_value_add_string_val_ascii none~add~4->proc~json_value_add_string_val_ascii proc~json_value_add_string_vec_name_ascii json_core%json_value_add_string_vec_name_ascii none~add~4->proc~json_value_add_string_vec_name_ascii proc~json_value_add_string_vec_val_ascii json_core%json_value_add_string_vec_val_ascii none~add~4->proc~json_value_add_string_vec_val_ascii 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~json_throw_exception json_core%json_throw_exception none~throw_exception->proc~json_throw_exception proc~wrap_json_throw_exception json_core%wrap_json_throw_exception none~throw_exception->proc~wrap_json_throw_exception proc~parse_string->none~throw_exception proc~parse_string->proc~pop_char proc~unescape_string unescape_string proc~parse_string->proc~unescape_string proc~parse_value->proc~parse_object proc~parse_value->none~throw_exception proc~parse_value->proc~parse_string proc~parse_value->proc~pop_char proc~parse_array json_core%parse_array proc~parse_value->proc~parse_array proc~parse_for_chars json_core%parse_for_chars proc~parse_value->proc~parse_for_chars proc~parse_number json_core%parse_number proc~parse_value->proc~parse_number proc~push_char json_core%push_char proc~parse_value->proc~push_char proc~to_array json_core%to_array proc~parse_value->proc~to_array proc~to_logical json_core%to_logical proc~parse_value->proc~to_logical proc~to_null json_core%to_null proc~parse_value->proc~to_null proc~to_object json_core%to_object proc~parse_value->proc~to_object proc~to_string json_core%to_string proc~parse_value->proc~to_string proc~json_value_add_string_name_ascii->none~add~4 interface~to_unicode to_unicode proc~json_value_add_string_name_ascii->interface~to_unicode proc~json_value_add_string_val_ascii->none~add~4 proc~json_value_add_string_val_ascii->interface~to_unicode proc~json_value_add_string_vec_name_ascii->none~add~4 proc~json_value_add_string_vec_name_ascii->interface~to_unicode proc~json_value_add_string_vec_val_ascii->none~add~4 proc~json_value_add_string_vec_val_ascii->interface~to_unicode proc~json_value_destroy->none~destroy~3 proc~destroy_json_data destroy_json_data proc~json_value_destroy->proc~destroy_json_data proc~parse_array->none~add~4 proc~parse_array->none~destroy~3 proc~parse_array->none~throw_exception proc~parse_array->proc~json_value_create proc~parse_array->proc~parse_value proc~parse_array->proc~pop_char 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~push_char->none~throw_exception proc~integer_to_string integer_to_string proc~push_char->proc~integer_to_string 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~valid_json_hex valid_json_hex proc~unescape_string->proc~valid_json_hex proc~wrap_json_throw_exception->none~throw_exception proc~wrap_json_throw_exception->interface~to_unicode proc~to_uni to_uni interface~to_unicode->proc~to_uni proc~to_uni_vec to_uni_vec interface~to_unicode->proc~to_uni_vec proc~string_to_dble->none~throw_exception proc~string_to_real string_to_real proc~string_to_dble->proc~string_to_real 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

Called by

proc~~parse_object~~CalledByGraph proc~parse_object json_core%parse_object proc~parse_object->proc~parse_object proc~parse_value json_core%parse_value proc~parse_object->proc~parse_value proc~parse_value->proc~parse_object proc~parse_array json_core%parse_array proc~parse_value->proc~parse_array proc~json_parse_file json_core%json_parse_file proc~json_parse_file->proc~parse_value proc~json_parse_string json_core%json_parse_string proc~json_parse_string->proc~parse_value proc~parse_array->proc~parse_value none~deserialize~2 json_core%deserialize none~deserialize~2->proc~json_parse_string proc~wrap_json_parse_string json_core%wrap_json_parse_string none~deserialize~2->proc~wrap_json_parse_string none~load~2 json_core%load none~load~2->proc~json_parse_file proc~json_file_load json_file%json_file_load proc~json_file_load->none~load~2 proc~json_file_load_from_string json_file%json_file_load_from_string proc~json_file_load_from_string->none~deserialize~2 proc~wrap_json_parse_string->none~deserialize~2 none~deserialize json_file%deserialize none~deserialize->proc~json_file_load_from_string proc~wrap_json_file_load_from_string json_file%wrap_json_file_load_from_string none~deserialize->proc~wrap_json_file_load_from_string proc~assign_string_to_json_file json_file%assign_string_to_json_file proc~assign_string_to_json_file->none~deserialize proc~initialize_json_file_from_string initialize_json_file_from_string proc~initialize_json_file_from_string->none~deserialize proc~initialize_json_file_from_string_v2 initialize_json_file_from_string_v2 proc~initialize_json_file_from_string_v2->none~deserialize proc~wrap_json_file_load_from_string->none~deserialize interface~json_file json_file interface~json_file->proc~initialize_json_file_from_string interface~json_file->proc~initialize_json_file_from_string_v2 proc~wrap_initialize_json_file_from_string wrap_initialize_json_file_from_string interface~json_file->proc~wrap_initialize_json_file_from_string proc~wrap_initialize_json_file_from_string_v2 wrap_initialize_json_file_from_string_v2 interface~json_file->proc~wrap_initialize_json_file_from_string_v2 proc~wrap_assign_string_to_json_file json_file%wrap_assign_string_to_json_file proc~wrap_assign_string_to_json_file->proc~assign_string_to_json_file proc~wrap_initialize_json_file_from_string->proc~initialize_json_file_from_string proc~wrap_initialize_json_file_from_string_v2->proc~initialize_json_file_from_string_v2

Source Code

    recursive subroutine parse_object(json, unit, str, parent, expecting_next_element)

    implicit none

    class(json_core),intent(inout)      :: json
    integer(IK),intent(in)              :: unit    !! file unit number (if parsing from a file)
    character(kind=CK,len=*),intent(in) :: str     !! JSON string (if parsing from a string)
    type(json_value),pointer            :: parent  !! the parsed object will be added as a child of this
    logical(LK),intent(in) :: expecting_next_element !! if true, this object is preceeded by a comma, so
                                                     !! we expect a valid object to exist. used to check
                                                     !! for trailing delimiters.

    type(json_value),pointer :: pair  !! temp variable
    logical(LK)              :: eof   !! end of file flag
    character(kind=CK,len=1) :: c     !! character returned 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(parent)) then
            call json%throw_exception('Error in parse_object: parent pointer not associated.')
        end if

        nullify(pair)    !probably not necessary

        ! pair name
        call json%pop_char(unit, str=str, eof=eof, skip_ws=.true., &
                           skip_comments=json%allow_comments, popped=c)
        if (eof) then
            call json%throw_exception('Error in parse_object:'//&
                                      ' Unexpected end of file while parsing start of object.')
            return
        else if (end_object == c) then
            ! end of an empty object
            if (expecting_next_element .and. .not. json%allow_trailing_comma) then
                ! this is a dangling comma.
                call json%throw_exception('Error in parse_object: '//&
                                          'Dangling comma when parsing an object.')
            end if
            return
        else if (quotation_mark == c) then
            call json_value_create(pair)
#if defined __GFORTRAN__
            call json%parse_string(unit,str,tmp)   ! write to a tmp variable because of
            pair%name = tmp                        ! a bug in 4.9 gfortran compiler.
            deallocate(tmp)
#else
            call json%parse_string(unit,str,pair%name)
#endif
            if (json%exception_thrown) then
                call json%destroy(pair)
                return
            end if
        else
            call json%throw_exception('Error in parse_object: Expecting string: "'//c//'"')
            return
        end if

        ! pair value
        call json%pop_char(unit, str=str, eof=eof, skip_ws=.true., &
                           skip_comments=json%allow_comments, popped=c)
        if (eof) then
            call json%destroy(pair)
            call json%throw_exception('Error in parse_object:'//&
                                      ' Unexpected end of file while parsing object member.')
            return
        else if (colon_char == c) then
            ! parse the value
            call json%parse_value(unit, str, pair)
            if (json%exception_thrown) then
                call json%destroy(pair)
                return
            else
                call json%add(parent, pair)
            end if
        else
            call json%destroy(pair)
            call json%throw_exception('Error in parse_object:'//&
                                      ' Expecting : and then a value: '//c)
            return
        end if

        ! another possible pair
        call json%pop_char(unit, str=str, eof=eof, skip_ws=.true., &
                           skip_comments=json%allow_comments, popped=c)
        if (eof) then
            call json%throw_exception('Error in parse_object: '//&
                                      'End of file encountered when parsing an object')
            return
        else if (delimiter == c) then
            ! read the next member
            call json%parse_object(unit = unit, str=str, parent = parent, &
                                   expecting_next_element=.true.)
        else if (end_object == c) then
            ! end of object
            return
        else
            call json%throw_exception('Error in parse_object: Expecting end of object: '//c)
            return
        end if

    end if

    end subroutine parse_object