DataMuseum.dk

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    Length: 2843 (0xb1b)
    Types: TextFile
    Names: »B«

└─⟦a7d1ea751⟧ Bits:30000550 8mm tape, Rational 1000, !users!projects 94_04_11
    └─ ⟦129cab021⟧ »DATA« 
        └─⟦this⟧ 

TextFile

with Oo_Ada_Exception;
with Text_Io;
with Unchecked_Conversion;
with Unchecked_Deallocation;

package body Fish is

    procedure Free is new Unchecked_Deallocation
                             (Object => State, Name => State_Ptr);


    function Application_View_Of is
       new Unchecked_Conversion (Source => State_Ptr,
                                 Target => Animal.Application.Object);


    function Fish_View_Of is
       new Unchecked_Conversion
              (Source => Animal.Application.Object, Target => State_Ptr);


    function Create (Offspring_No : Natural := 0) return Object is
        This_Animal : Animal.Object;
        This_State_Ptr : State_Ptr;  
        Animal_State_Ptr : Animal.State_Ptr;
    begin  
        This_State_Ptr := new State;
        This_State_Ptr.Offspring_No := Offspring_No;

        This_Animal := Animal.Create (1);
        Animal_State_Ptr := Animal.Part_Of (This_Animal);
        Animal.Set_Heir (Animal_State_Ptr,
                         Application_View_Of (This_State_Ptr));

        return Fish.Object (This_Animal);
    end Create;


    procedure Delete (This_Fish : in out Object) is separate;

    procedure Image (This_Fish : Object) is
    begin
        Text_Io.Put_Line ("fish is :");
        Animal.Image (Animal.Object (This_Fish));
        Text_Io.Put_Line ("fish state is :");
        Text_Io.Put_Line ("   fin number: " &
                          Positive'Image (Part_Of (This_Fish).Fin_Number));
    end Image;


    procedure Set_Fin (This_Fish : Object; Number : Positive) is  
    begin
        Part_Of (This_Fish).Fin_Number := Number;
    end Set_Fin;


    function Get_Fin (This_Fish : Object) return Positive is
    begin
        return Part_Of (This_Fish).Fin_Number;
    end Get_Fin;

    package Self is
        procedure Sleep (This_Fish : Object);
        procedure Swim (This_Fish : Object);
    end Self;

    package body Self is separate;

    procedure Sleep (This_Fish : Object) is separate;

    procedure Swim (This_Fish : Object) is separate;


    function Part_Of (This_Fish : Object) return State_Ptr is  
        This_State_Ptr : State_Ptr;
    begin
        This_State_Ptr :=
           Fish_View_Of (S => Animal.Get_Heir
                                 (Animal.Part_Of (Animal.Object (This_Fish))));

        if This_State_Ptr = null then
            raise Oo_Ada_Exception.Part_Of_Error;
        else
            return This_State_Ptr;
        end if;
    end Part_Of;


    procedure Set_Heir (This_State_Ptr : in out State_Ptr;
                        Heir : Animal.Application.Object) is
    begin
        This_State_Ptr.Heir := Heir;
    end Set_Heir;


    function Get_Heir (This_State_Ptr : State_Ptr)
                      return Animal.Application.Object is
    begin
        return This_State_Ptr.Heir;
    end Get_Heir;

end Fish;