-- --
-- B o d y --
-- --
--- Copyright (C) 2004-2005 Free Software Foundation, Inc. --
--- --
--- This specification is derived from the Ada Reference Manual for use with --
--- GNAT. The copyright notice above, and the license provisions that follow --
--- apply solely to the contents of the part following the private keyword. --
+-- Copyright (C) 2004-2006, Free Software Foundation, Inc. --
-- --
-- GNAT is free software; you can redistribute it and/or modify it under --
-- terms of the GNU General Public License as published by the Free Soft- --
pragma Inline (Next);
function Read_Node
- (Stream : access Root_Stream_Type'Class) return Node_Access;
+ (Stream : not null access Root_Stream_Type'Class) return Node_Access;
procedure Set_Next (Node : Node_Access; Next : Node_Access);
pragma Inline (Set_Next);
function Vet (Position : Cursor) return Boolean;
procedure Write_Node
- (Stream : access Root_Stream_Type'Class;
+ (Stream : not null access Root_Stream_Type'Class;
Node : Node_Access);
--------------------------
Key_Ops.Delete_Key_Sans_Free (Container.HT, Key, X);
if X = null then
- raise Constraint_Error;
+ raise Constraint_Error with "attempt to delete key not in map";
end if;
Free (X);
procedure Delete (Container : in out Map; Position : in out Cursor) is
begin
- pragma Assert (Vet (Position), "bad cursor in Delete");
-
if Position.Node = null then
- raise Constraint_Error;
+ raise Constraint_Error with
+ "Position cursor of Delete equals No_Element";
end if;
if Position.Container /= Container'Unrestricted_Access then
- raise Program_Error;
+ raise Program_Error with
+ "Position cursor of Delete designates wrong map";
end if;
if Container.HT.Busy > 0 then
- raise Program_Error;
+ raise Program_Error with
+ "Delete attempted to tamper with elements (map is busy)";
end if;
+ pragma Assert (Vet (Position), "bad cursor in Delete");
+
HT_Ops.Delete_Node_Sans_Free (Container.HT, Position.Node);
Free (Position.Node);
begin
if Node = null then
- raise Constraint_Error;
+ raise Constraint_Error with
+ "no element available because key not in map";
end if;
return Node.Element.all;
function Element (Position : Cursor) return Element_Type is
begin
- pragma Assert (Vet (Position), "bad cursor in function Element");
-
if Position.Node = null then
- raise Constraint_Error;
+ raise Constraint_Error with
+ "Position cursor of function Element equals No_Element";
end if;
+ if Position.Node.Element = null then
+ raise Program_Error with
+ "Position cursor of function Element is bad";
+ end if;
+
+ pragma Assert (Vet (Position), "bad cursor in function Element");
+
return Position.Node.Element.all;
end Element;
function Equivalent_Keys (Left, Right : Cursor) return Boolean is
begin
- pragma Assert (Vet (Left), "bad Left cursor in Equivalent_Keys");
- pragma Assert (Vet (Right), "bad Right cursor in Equivalent_Keys");
+ if Left.Node = null then
+ raise Constraint_Error with
+ "Left cursor of Equivalent_Keys equals No_Element";
+ end if;
- if Left.Node = null
- or else Right.Node = null
- then
- raise Constraint_Error;
+ if Right.Node = null then
+ raise Constraint_Error with
+ "Right cursor of Equivalent_Keys equals No_Element";
+ end if;
+
+ if Left.Node.Key = null then
+ raise Program_Error with
+ "Left cursor of Equivalent_Keys is bad";
end if;
+ if Right.Node.Key = null then
+ raise Program_Error with
+ "Right cursor of Equivalent_Keys is bad";
+ end if;
+
+ pragma Assert (Vet (Left), "bad Left cursor in Equivalent_Keys");
+ pragma Assert (Vet (Right), "bad Right cursor in Equivalent_Keys");
+
return Equivalent_Keys (Left.Node.Key.all, Right.Node.Key.all);
end Equivalent_Keys;
Right : Key_Type) return Boolean
is
begin
- pragma Assert (Vet (Left), "bad Left cursor in Equivalent_Keys");
-
if Left.Node = null then
- raise Constraint_Error;
+ raise Constraint_Error with
+ "Left cursor of Equivalent_Keys equals No_Element";
+ end if;
+
+ if Left.Node.Key = null then
+ raise Program_Error with
+ "Left cursor of Equivalent_Keys is bad";
end if;
+ pragma Assert (Vet (Left), "bad Left cursor in Equivalent_Keys");
+
return Equivalent_Keys (Left.Node.Key.all, Right);
end Equivalent_Keys;
Right : Cursor) return Boolean
is
begin
- pragma Assert (Vet (Right), "bad Right cursor in Equivalent_Keys");
-
if Right.Node = null then
- raise Constraint_Error;
+ raise Constraint_Error with
+ "Right cursor of Equivalent_Keys equals No_Element";
end if;
+ if Right.Node.Key = null then
+ raise Program_Error with
+ "Right cursor of Equivalent_Keys is bad";
+ end if;
+
+ pragma Assert (Vet (Right), "bad Right cursor in Equivalent_Keys");
+
return Equivalent_Keys (Left, Right.Node.Key.all);
end Equivalent_Keys;
if not Inserted then
if Container.HT.Lock > 0 then
- raise Program_Error;
+ raise Program_Error with
+ "Include attempted to tamper with cursors (map is locked)";
end if;
K := Position.Node.Key;
Insert (Container, Key, New_Item, Position, Inserted);
if not Inserted then
- raise Constraint_Error;
+ raise Constraint_Error with
+ "attempt to insert key already in map";
end if;
end Insert;
procedure Process_Node (Node : Node_Access);
pragma Inline (Process_Node);
- procedure Iterate is
+ procedure Local_Iterate is
new HT_Ops.Generic_Iteration (Process_Node);
------------------
Process (Cursor'(Container'Unchecked_Access, Node));
end Process_Node;
+ B : Natural renames Container'Unrestricted_Access.HT.Busy;
+
-- Start of processing Iterate
begin
- Iterate (Container.HT);
+ B := B + 1;
+
+ begin
+ Local_Iterate (Container.HT);
+ exception
+ when others =>
+ B := B - 1;
+ raise;
+ end;
+
+ B := B - 1;
end Iterate;
---------
function Key (Position : Cursor) return Key_Type is
begin
- pragma Assert (Vet (Position), "bad cursor in function Key");
-
if Position.Node = null then
- raise Constraint_Error;
+ raise Constraint_Error with
+ "Position cursor of function Key equals No_Element";
+ end if;
+
+ if Position.Node.Key = null then
+ raise Program_Error with
+ "Position cursor of function Key is bad";
end if;
+ pragma Assert (Vet (Position), "bad cursor in function Key");
+
return Position.Node.Key.all;
end Key;
function Next (Position : Cursor) return Cursor is
begin
- pragma Assert (Vet (Position), "bad cursor in function Next");
-
if Position.Node = null then
return No_Element;
end if;
+ if Position.Node.Key = null
+ or else Position.Node.Element = null
+ then
+ raise Program_Error with "Position cursor of Next is bad";
+ end if;
+
+ pragma Assert (Vet (Position), "Position cursor of Next is bad");
+
declare
HT : Hash_Table_Type renames Position.Container.HT;
Node : constant Node_Access := HT_Ops.Next (HT, Position.Node);
Element : Element_Type))
is
begin
- pragma Assert (Vet (Position), "bad cursor in Query_Element");
-
if Position.Node = null then
- raise Constraint_Error;
+ raise Constraint_Error with
+ "Position cursor of Query_Element equals No_Element";
end if;
+ if Position.Node.Key = null
+ or else Position.Node.Element = null
+ then
+ raise Program_Error with
+ "Position cursor of Query_Element is bad";
+ end if;
+
+ pragma Assert (Vet (Position), "bad cursor in Query_Element");
+
declare
M : Map renames Position.Container.all;
HT : Hash_Table_Type renames M.HT'Unrestricted_Access.all;
procedure Read_Nodes is new HT_Ops.Generic_Read (Read_Node);
procedure Read
- (Stream : access Root_Stream_Type'Class;
+ (Stream : not null access Root_Stream_Type'Class;
Container : out Map)
is
begin
Read_Nodes (Stream, Container.HT);
end Read;
+ procedure Read
+ (Stream : not null access Root_Stream_Type'Class;
+ Item : out Cursor)
+ is
+ begin
+ raise Program_Error with "attempt to stream map cursor";
+ end Read;
+
---------------
-- Read_Node --
---------------
function Read_Node
- (Stream : access Root_Stream_Type'Class) return Node_Access
+ (Stream : not null access Root_Stream_Type'Class) return Node_Access
is
Node : Node_Access := new Node_Type;
begin
if Node = null then
- raise Constraint_Error;
+ raise Constraint_Error with
+ "attempt to replace key not in map";
end if;
if Container.HT.Lock > 0 then
- raise Program_Error;
+ raise Program_Error with
+ "Replace attempted to tamper with cursors (map is locked)";
end if;
K := Node.Key;
-- Replace_Element --
---------------------
- procedure Replace_Element (Position : Cursor; By : Element_Type) is
+ procedure Replace_Element
+ (Container : in out Map;
+ Position : Cursor;
+ New_Item : Element_Type)
+ is
begin
- pragma Assert (Vet (Position), "bad cursor in Replace_Element");
-
if Position.Node = null then
- raise Constraint_Error;
+ raise Constraint_Error with
+ "Position cursor of Replace_Element equals No_Element";
+ end if;
+
+ if Position.Node.Key = null
+ or else Position.Node.Element = null
+ then
+ raise Program_Error with
+ "Position cursor of Replace_Element is bad";
+ end if;
+
+ if Position.Container /= Container'Unrestricted_Access then
+ raise Program_Error with
+ "Position cursor of Replace_Element designates wrong map";
end if;
if Position.Container.HT.Lock > 0 then
- raise Program_Error;
+ raise Program_Error with
+ "Replace_Element attempted to tamper with cursors (map is locked)";
end if;
+ pragma Assert (Vet (Position), "bad cursor in Replace_Element");
+
declare
X : Element_Access := Position.Node.Element;
begin
- Position.Node.Element := new Element_Type'(By);
+ Position.Node.Element := new Element_Type'(New_Item);
Free_Element (X);
end;
end Replace_Element;
--------------------
procedure Update_Element
- (Position : Cursor;
- Process : not null access procedure (Key : Key_Type;
- Element : in out Element_Type))
+ (Container : in out Map;
+ Position : Cursor;
+ Process : not null access procedure (Key : Key_Type;
+ Element : in out Element_Type))
is
begin
- pragma Assert (Vet (Position), "bad cursor in Update_Element");
-
if Position.Node = null then
- raise Constraint_Error;
+ raise Constraint_Error with
+ "Position cursor of Update_Element equals No_Element";
+ end if;
+
+ if Position.Node.Key = null
+ or else Position.Node.Element = null
+ then
+ raise Program_Error with
+ "Position cursor of Update_Element is bad";
end if;
+ if Position.Container /= Container'Unrestricted_Access then
+ raise Program_Error with
+ "Position cursor of Update_Element designates wrong map";
+ end if;
+
+ pragma Assert (Vet (Position), "bad cursor in Update_Element");
+
declare
- M : Map renames Position.Container.all;
- HT : Hash_Table_Type renames M.HT'Unrestricted_Access.all;
+ HT : Hash_Table_Type renames Container.HT;
B : Natural renames HT.Busy;
L : Natural renames HT.Lock;
declare
K : Key_Type renames Position.Node.Key.all;
E : Element_Type renames Position.Node.Element.all;
-
begin
Process (K, E);
exception
procedure Write_Nodes is new HT_Ops.Generic_Write (Write_Node);
procedure Write
- (Stream : access Root_Stream_Type'Class;
+ (Stream : not null access Root_Stream_Type'Class;
Container : Map)
is
begin
Write_Nodes (Stream, Container.HT);
end Write;
+ procedure Write
+ (Stream : not null access Root_Stream_Type'Class;
+ Item : Cursor)
+ is
+ begin
+ raise Program_Error with "attempt to stream map cursor";
+ end Write;
+
----------------
-- Write_Node --
----------------
procedure Write_Node
- (Stream : access Root_Stream_Type'Class;
+ (Stream : not null access Root_Stream_Type'Class;
Node : Node_Access)
is
begin
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