added some essential procedures
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@ -7,30 +7,148 @@ procedure Apply is
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Func: aliased Object_Pointer;
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Args: aliased Object_Pointer;
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-- -------------------------------------------------------------
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-- Questioning procedures
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-- -------------------------------------------------------------
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generic
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with function Question (X: in Object_Pointer) return Standard.Boolean;
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procedure Apply_Question_Procedure;
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procedure Apply_Question_Procedure is
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Bool: Object_Pointer;
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begin
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if Is_Cons(Args) and then not Is_Cons(Get_Cdr(Args)) then
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-- 1 actual argument
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if Question(Get_Car(Args)) then
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Bool := True_Pointer;
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else
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Bool := False_Pointer;
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end if;
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Return_Frame (Interp, Bool);
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else
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Ada.Text_IO.Put_line ("WRONG NUMBER OF ARGUMETNS FOR COMPARISON");
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raise Syntax_Error;
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end if;
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end Apply_Question_Procedure;
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function Is_Number_Class (X: in Object_Pointer) return Standard.Boolean is
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pragma Inline (Is_Number_Class);
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begin
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return Is_Integer(X); -- TODO bignum
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end Is_Number_Class;
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function Is_Procedure_Class (X: in Object_Pointer) return Standard.Boolean is
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pragma Inline (Is_Procedure_Class);
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begin
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return Is_Closure(X) or else Is_Procedure(X) or else Is_Continuation(X);
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end Is_Procedure_Class;
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procedure Apply_Q_Number_Procedure is new Apply_Question_Procedure (Is_Number_Class);
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procedure Apply_Q_Procedure_Procedure is new Apply_Question_Procedure (Is_Procedure_Class);
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-- -------------------------------------------------------------
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-- Boolean procedures
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-- -------------------------------------------------------------
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procedure Apply_Not_Procedure is
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Ptr: Object_Pointer;
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begin
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null;
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-- (not obj)
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-- 'not' returns #t if obj is false, and returns #f otherwise.
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-- (not #t) ; #f
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-- (not 0) ; #f
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-- (not #f) ; #t
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if not Is_Cons(Args) or else Get_Cdr(Args) /= Nil_Pointer then
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Ada.Text_IO.Put_Line ("WRONG NUMBER OF ARGUMETNS FOR NOT?");
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raise Syntax_Error;
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end if;
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Ptr := Get_Car(Args);
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if Is_True_Class(Ptr) then
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Ptr := False_Pointer;
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else
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Ptr := True_Pointer;
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end if;
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Return_Frame (Interp, Ptr);
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end Apply_Not_Procedure;
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procedure Apply_Q_Boolean_Procedure is
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Ptr: Object_Pointer;
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begin
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null;
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-- (boolean? obj)
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-- it returns #t if obj is either #t or #f and
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-- returns #f otherwise.
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-- (boolean? #f) ; #t
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-- (boolean? 0) ; #f
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if not Is_Cons(Args) or else Get_Cdr(Args) /= Nil_Pointer then
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Ada.Text_IO.Put_Line ("WRONG NUMBER OF ARGUMETNS FOR BOOLEAN?");
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raise Syntax_Error;
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end if;
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Ptr := Get_Car(Args);
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if Ptr = True_Pointer or else Ptr = False_Pointer then
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Ptr := True_Pointer;
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else
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Ptr := False_Pointer;
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end if;
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Return_Frame (Interp, Ptr);
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end Apply_Q_Boolean_Procedure;
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-- -------------------------------------------------------------
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-- Equivalence predicates
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-- -------------------------------------------------------------
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procedure Apply_Q_Eqv_Procedure is
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procedure Apply_Q_Eq_Procedure is
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Ptr: Object_Pointer;
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begin
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null;
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if not Is_Cons(Args) or else Get_Cdr(Args) = Nil_Pointer or else Get_Cdr(Get_Cdr(Args)) /= Nil_Pointer then
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Ada.Text_IO.Put_Line ("WRONG NUMBER OF ARGUMETNS FOR EQ?");
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raise Syntax_Error;
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end if;
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if Get_Car(Args) = Get_Car(Get_Cdr(Args)) then
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Ptr := True_Pointer;
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else
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Ptr := False_Pointer;
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end if;
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Return_Frame (Interp, Ptr);
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end Apply_Q_Eq_Procedure;
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procedure Apply_Q_Eqv_Procedure is
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Ptr: Object_Pointer;
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begin
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if not Is_Cons(Args) or else Get_Cdr(Args) = Nil_Pointer or else Get_Cdr(Get_Cdr(Args)) /= Nil_Pointer then
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Ada.Text_IO.Put_Line ("WRONG NUMBER OF ARGUMETNS FOR EQV?");
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raise Syntax_Error;
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end if;
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if Equal_Values(Get_Car(Args), Get_Car(Get_Cdr(Args))) then
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Ptr := True_Pointer;
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else
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Ptr := False_Pointer;
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end if;
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Return_Frame (Interp, Ptr);
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end Apply_Q_Eqv_Procedure;
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-- -------------------------------------------------------------
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-- List manipulation procedures
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-- -------------------------------------------------------------
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function Is_Null_Class (X: in Object_Pointer) return Standard.Boolean is
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pragma Inline (Is_Null_Class);
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begin
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return X = Nil_Pointer;
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end Is_Null_Class;
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function Is_Pair_Class (X: in Object_Pointer) return Standard.Boolean is
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pragma Inline (Is_Pair_Class);
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begin
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return Is_Cons(X);
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end Is_Pair_Class;
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procedure Apply_Q_Null_Procedure is new Apply_Question_Procedure (Is_Null_Class);
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procedure Apply_Q_Pair_Procedure is new Apply_Question_Procedure (Is_Pair_Class);
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procedure Apply_Car_Procedure is
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Ptr: Object_Pointer := Args;
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A: Object_Pointer;
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@ -126,6 +244,41 @@ Ada.Text_IO.Put_Line ("EXPECTED CONS-CELL FOR Setcdr");
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Return_Frame (Interp, A);
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end Apply_Setcdr_Procedure;
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-- -------------------------------------------------------------
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-- Symbol procedures
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-- -------------------------------------------------------------
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procedure Apply_Q_Symbol_Procedure is new Apply_Question_Procedure (Is_Symbol);
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-- -------------------------------------------------------------
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-- String procedures
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-- -------------------------------------------------------------
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procedure Apply_Q_String_Procedure is new Apply_Question_Procedure (Is_String);
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procedure Apply_Q_String_EQ_Procedure is
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Ptr1: Object_Pointer;
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Ptr2: Object_Pointer;
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begin
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if not Is_Cons(Args) or else Get_Cdr(Args) = Nil_Pointer or else Get_Cdr(Get_Cdr(Args)) /= Nil_Pointer then
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Ada.Text_IO.Put_Line ("WRONG NUMBER OF ARGUMETNS FOR STRING=?");
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raise Syntax_Error;
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end if;
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Ptr1 := Get_Car(Args);
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Ptr2 := Get_Car(Get_Cdr(Args));
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if not Is_String(Ptr1) or else not Is_String(Ptr2) then
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Ada.Text_IO.Put_Line ("STRING EXPECTED FOR STRING=?");
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raise Evaluation_Error;
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end if;
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if Ptr1.Character_Slot = Ptr2.Character_Slot then
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Ptr1 := True_Pointer;
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else
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Ptr1 := False_Pointer;
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end if;
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Return_Frame (Interp, Ptr1);
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end Apply_Q_String_EQ_Procedure;
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-- -------------------------------------------------------------
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-- Arithmetic procedures
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-- -------------------------------------------------------------
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@ -304,71 +457,6 @@ Ada.Text_IO.Put_line ("TOO FEW ARGUMETNS FOR COMPARISON");
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procedure Apply_N_GE_Procedure is new Apply_Compare_Procedure (Validate_Numeric, Greater_Or_Equal);
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procedure Apply_N_LE_Procedure is new Apply_Compare_Procedure (Validate_Numeric, Less_Or_Equal);
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-- -------------------------------------------------------------
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-- Questioning procedures
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-- -------------------------------------------------------------
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generic
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with function Question (X: in Object_Pointer) return Standard.Boolean;
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procedure Apply_Question_Procedure;
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procedure Apply_Question_Procedure is
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Bool: Object_Pointer;
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begin
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if Is_Cons(Args) and then not Is_Cons(Get_Cdr(Args)) then
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-- 1 actual argument
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if Question(Get_Car(Args)) then
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Bool := True_Pointer;
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else
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Bool := False_Pointer;
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end if;
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Return_Frame (Interp, Bool);
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else
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Ada.Text_IO.Put_line ("WRONG NUMBER OF ARGUMETNS FOR COMPARISON");
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raise Syntax_Error;
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end if;
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end Apply_Question_Procedure;
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function Is_Null_Class (X: in Object_Pointer) return Standard.Boolean is
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pragma Inline (Is_Null_Class);
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begin
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return X = Nil_Pointer;
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end Is_Null_Class;
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function Is_Number_Class (X: in Object_Pointer) return Standard.Boolean is
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pragma Inline (Is_Number_Class);
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begin
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return Is_Integer(X); -- TODO bignum
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end Is_Number_Class;
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function Is_Procedure_Class (X: in Object_Pointer) return Standard.Boolean is
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pragma Inline (Is_Procedure_Class);
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begin
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return Is_Closure(X) or else Is_Procedure(X) or else Is_Continuation(X);
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end Is_Procedure_Class;
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function Is_String_Class (X: in Object_Pointer) return Standard.Boolean is
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pragma Inline (Is_String_Class);
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begin
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return Is_String(X);
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end Is_String_Class;
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function Is_Symbol_Class (X: in Object_Pointer) return Standard.Boolean is
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pragma Inline (Is_Symbol_Class);
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begin
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return Is_Symbol(X);
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end Is_Symbol_Class;
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procedure Apply_Q_Null_Procedure is new Apply_Question_Procedure (Is_Null_Class);
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procedure Apply_Q_Number_Procedure is new Apply_Question_Procedure (Is_Number_Class);
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procedure Apply_Q_Procedure_Procedure is new Apply_Question_Procedure (Is_Procedure_Class);
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procedure Apply_Q_String_Procedure is new Apply_Question_Procedure (Is_String_Class);
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procedure Apply_Q_Symbol_Procedure is new Apply_Question_Procedure (Is_Symbol_Class);
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procedure Apply_Q_Eq_Procedure is
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begin
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null;
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end Apply_Q_Eq_Procedure;
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-- -------------------------------------------------------------
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@ -608,18 +696,22 @@ begin
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Apply_Q_Eq_Procedure;
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when Q_Eqv_Procedure =>
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Apply_Q_Eqv_Procedure;
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when Q_Null_Procedure =>
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Apply_Q_Null_Procedure;
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when Q_Number_Procedure =>
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Apply_Q_Number_Procedure;
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when Q_Pair_Procedure =>
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Apply_Q_Pair_Procedure;
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when Q_Procedure_Procedure =>
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Apply_Q_Procedure_Procedure;
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when Q_String_Procedure =>
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Apply_Q_String_Procedure;
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when Q_String_EQ_Procedure =>
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Apply_Q_String_EQ_Procedure;
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when Q_Symbol_Procedure =>
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Apply_Q_Symbol_Procedure;
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when Setcar_Procedure =>
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Apply_Setcar_Procedure;
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when Setcdr_Procedure =>
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@ -44,8 +44,10 @@ package body H2.Scheme is
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Q_Eqv_Procedure,
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Q_Null_Procedure,
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Q_Number_Procedure,
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Q_Pair_Procedure,
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Q_Procedure_Procedure,
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Q_String_Procedure,
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Q_String_EQ_Procedure,
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Q_Symbol_Procedure,
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Setcar_Procedure,
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@ -102,8 +104,10 @@ package body H2.Scheme is
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Label_Q_Eqv: constant Object_Character_Array := (Ch.LC_E, Ch.LC_Q, Ch.LC_V, Ch.Question); -- "eqv?"
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Label_Q_Null: constant Object_Character_Array := (Ch.LC_N, Ch.LC_U, Ch.LC_L, Ch.LC_L, Ch.Question); -- "null?"
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Label_Q_Number: constant Object_Character_Array := (Ch.LC_N, Ch.LC_U, Ch.LC_M, Ch.LC_B, Ch.LC_E, Ch.LC_R, Ch.Question); -- "number?"
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Label_Q_Pair: constant Object_Character_Array := (Ch.LC_P, Ch.LC_A, Ch.LC_I, Ch.LC_R, Ch.Question); -- "pair?"
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Label_Q_Procedure: constant Object_Character_Array := (Ch.LC_P, Ch.LC_R, Ch.LC_O, Ch.LC_C, Ch.LC_E, Ch.LC_D, Ch.LC_U, Ch.LC_R, Ch.LC_E, Ch.Question); -- "procedure?"
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Label_Q_String: constant Object_Character_Array := (Ch.LC_S, Ch.LC_T, Ch.LC_R, Ch.LC_I, Ch.LC_N, Ch.LC_G, Ch.Question); -- "string?"
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Label_Q_String_EQ: constant Object_Character_Array := (Ch.LC_S, Ch.LC_T, Ch.LC_R, Ch.LC_I, Ch.LC_N, Ch.LC_G, Ch.Equal_Sign, Ch.Question); -- "string=?"
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Label_Q_Symbol: constant Object_Character_Array := (Ch.LC_S, Ch.LC_Y, Ch.LC_M, Ch.LC_B, Ch.LC_O, Ch.LC_L, Ch.Question); -- "symbol?"
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Label_Setcar: constant Object_Character_Array := (Ch.LC_S, Ch.LC_E, Ch.LC_T, Ch.Minus_Sign, Ch.LC_C, Ch.LC_A, Ch.LC_R, Ch.Exclamation); -- "set-car!"
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@ -499,7 +503,9 @@ package body H2.Scheme is
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when others =>
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-- TODO: BIGNUM, OTHER NUMERIC DATA.
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if Get_Pointer_Type(Y) /= Ptr_Type then
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if Is_Special_Pointer(X) then
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return X = Y;
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elsif Get_Pointer_Type(Y) /= Ptr_Type then
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return Standard.False;
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end if;
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@ -531,8 +537,6 @@ package body H2.Scheme is
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when Moved_Object =>
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raise Internal_Error;
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end case;
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return X = Y;
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end case;
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end Equal_Values;
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@ -1943,8 +1947,10 @@ end if;
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Dummy := Make_Procedure (Interp.Self, Q_Eqv_Procedure, Label_Q_Eqv); -- "eqv?"
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Dummy := Make_Procedure (Interp.Self, Q_Null_Procedure, Label_Q_Null); -- "null?"
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Dummy := Make_Procedure (Interp.Self, Q_Number_Procedure, Label_Q_Number); -- "number?"
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Dummy := Make_Procedure (Interp.Self, Q_Pair_Procedure, Label_Q_Pair); -- "pair?"
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Dummy := Make_Procedure (Interp.Self, Q_Procedure_Procedure, Label_Q_Procedure); -- "procedure?"
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Dummy := Make_Procedure (Interp.Self, Q_String_Procedure, Label_Q_String); -- "string?"
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Dummy := Make_Procedure (Interp.Self, Q_String_EQ_Procedure, Label_Q_String_EQ); -- "string=?"
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Dummy := Make_Procedure (Interp.Self, Q_Symbol_Procedure, Label_Q_Symbol); -- "symbol?"
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Dummy := Make_Procedure (Interp.Self, Setcar_Procedure, Label_Setcar); -- "set-car!"
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