hcl/lib2/hello.adb

with H3.Pool;
with H3.Limited_Pool;
with H3.Strings;
with H3.Storage_Pools;
with H3.MM;
with GNAT.Debug_Pools;
with System.Storage_Pools;
with System.Pool_Global;
with Ada.Unchecked_Deallocation;
with Ada.Text_IO;
with Ada.Wide_Text_IO;

procedure hello is
	package S is new H3.Strings(Wide_Character, Wide_Character'Val(0));

	--type Global_Pool is new System.Storage_Pools.Root_Storage_Pool with null record;
	P1: aliased System.Pool_Global.Unbounded_No_Reclaim_Pool;
	P2: aliased GNAT.Debug_Pools.Debug_Pool;
	P3: aliased H3.Storage_Pools.Global_Pool;

	type T is record
		A: Integer := 99;
		B: Integer := 88;
		C: Float;
	end record;

	type L is limited record
		A: Integer := 1234;
		B: Integer;
		C: Float;
	end record;

	type T_Pointer is access T;
	package TP is new H3.Pool(T, T_Pointer, P1'Unchecked_Access);

	type L_Pointer is access L;
	package LP is new H3.Limited_Pool(L, L_Pointer, P1'Unchecked_Access);

	type I_Pointer is access Integer;
	package IP is new H3.Pool(Integer, I_Pointer, P1'Unchecked_Access);

 	procedure Info is new GNAT.Debug_Pools.Print_Info(Ada.Text_IO.Put_Line, Ada.Text_IO.Put);

	x: T_Pointer;
	i: I_Pointer;
	y: L_Pointer;

	SS: S.Elastic_String;
begin
	x := TP.Allocate((A => 900, B => 800, C => 1.1));
	i := IP.Allocate(200);

	y := LP.Allocate;
-- can't do this as it's limited
	--y.all := (A => 1900, B => 1800, C => 11.1);
-- this works...
	--y.A := 1900;
	y.B := 1800;
	y.C := 11.1;

	declare
		type LL_Pointer is access L;
		for LL_Pointer'Storage_Pool use P3;
		z: LL_Pointer;
		procedure Dealloc is new Ada.Unchecked_Deallocation(L, LL_Pointer);
	begin
		z := new L'(A => 9900, B => 9800, C => 99.1);	
		Ada.Text_IO.Put_Line (Z.A'Img);
		Dealloc (z);
	end;


	Ada.Text_IO.Put_Line(Integer'Image(x.A));
	Ada.Text_IO.Put_Line(Integer'Image(x.B));
	Ada.Text_IO.Put_Line(Integer'Image(i.all));
	Ada.Text_IO.Put_Line(Integer'Image(y.A));

	IP.Deallocate (i);
	TP.Deallocate (x);
	LP.Deallocate (y);
	
 	--GNAT.Debug_Pools.Print_Info_Stdout(P2);
 	--GNAT.Debug_Pools.Dump_Stdout(P2,  100);
	
	declare
		str: S.Elastic_String;
		len: H3.System_Size;
		capa: H3.System_Size;
	begin
		len := S.Get_Length(Str);
		capa := S.Get_Capacity(Str);
		Ada.Text_IO.Put_Line ("length=>" & len'Img & " Capacity=>" & capa'Img);

		S.Append(Str, "Hello, world");
		len := S.Get_Length(Str);
		capa := S.Get_Capacity(Str);
		Ada.Text_IO.Put_Line ("length=>" & len'Img & " Capacity=>" & capa'Img);

		S.Append(Str, "");
		len := S.Get_Length(Str);
		capa := S.Get_Capacity(Str);
		Ada.Text_IO.Put_Line ("length=>" & len'Img & " Capacity=>" & capa'Img);

		S.Append(Str, "donkey");
		len := S.Get_Length(Str);
		capa := S.Get_Capacity(Str);
		Ada.Text_IO.Put_Line ("length=>" & len'Img & " Capacity=>" & capa'Img);

		
		declare
			arr: constant S.Character_Array := S.To_Character_Array(str);
		begin
			Ada.Wide_Text_IO.Put ("[");	
			for i in arr'Range loop
				Ada.Wide_Text_IO.Put (arr(i));	
			end loop;
			Ada.Wide_Text_IO.Put_Line ("]");	
		end;
		
		-- unsafe way to access the internal buffer.
		S.Append (Str, 'X');
		declare
			arr: constant S.Thin_Character_Array_Pointer := S.Get_Slot_Pointer(Str);
			use type H3.System_Word;
		begin
			Ada.Wide_Text_IO.Put ("[");	
			for i in 1 .. S.Get_Length(Str) + 1 loop
				Ada.Wide_Text_IO.Put (arr.all(i));
			end loop;
			Ada.Wide_Text_IO.Put_Line ("]");	
		end;

		--declare
		--	arr: constant Standard.Wide_String := S.To_Character_Array(str);
		--begin
		--	Ada.Wide_Text_IO.Put_Line (arr);	
		--end;
		SS := Str;
	end;

	declare
		type R_Record is record
			X: Standard.Integer := 3;
			Y: Standard.Integer := 4;
		end record;
		package Q is new H3.MM(R_Record);

		T: Q.Ref_Counted;
		T2: Q.Ref_Counted;

		P: Q.Item_Pointer;
	begin

		declare
			T3: Q.Ref_Counted;
		begin
			Q.Create (T3, (X => 20, Y => 30));	
			T := T3;
			--Q.Create (T);
		end;

		P := Q.Get_Item_Pointer(T);
		T2 := T;
		Q.Get_Item_Pointer(T).X := 12345;
		Ada.Text_IO.Put_Line(Q.Get_Item_Pointer(T).Y'Img);
		Ada.Text_IO.Put_Line(Q.Get_Item_Pointer(T).X'Img);
		
		Ada.Text_IO.Put_Line(Q.Get_Item_Pointer(T2).Y'Img);
		Ada.Text_IO.Put_Line(Q.Get_Item_Pointer(T2).X'Img);
	end;

end;