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Diffstat (limited to 'gcc-4.3.1/gcc/ada/a-chtgke.ads')
| -rw-r--r-- | gcc-4.3.1/gcc/ada/a-chtgke.ads | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/gcc-4.3.1/gcc/ada/a-chtgke.ads b/gcc-4.3.1/gcc/ada/a-chtgke.ads new file mode 100644 index 000000000..833976aca --- /dev/null +++ b/gcc-4.3.1/gcc/ada/a-chtgke.ads @@ -0,0 +1,107 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT LIBRARY COMPONENTS -- +-- -- +-- A D A . C O N T A I N E R S . -- +-- H A S H _ T A B L E S . G E N E R I C _ K E Y S -- +-- -- +-- S p e c -- +-- -- +-- 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- -- +-- ware Foundation; either version 2, or (at your option) any later ver- -- +-- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- +-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- +-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License -- +-- for more details. You should have received a copy of the GNU General -- +-- Public License distributed with GNAT; see file COPYING. If not, write -- +-- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, -- +-- Boston, MA 02110-1301, USA. -- +-- -- +-- As a special exception, if other files instantiate generics from this -- +-- unit, or you link this unit with other files to produce an executable, -- +-- this unit does not by itself cause the resulting executable to be -- +-- covered by the GNU General Public License. This exception does not -- +-- however invalidate any other reasons why the executable file might be -- +-- covered by the GNU Public License. -- +-- -- +-- This unit was originally developed by Matthew J Heaney. -- +------------------------------------------------------------------------------ + +-- Hash_Table_Type is used to implement hashed containers. This package +-- declares hash-table operations that depend on keys. + +generic + with package HT_Types is + new Generic_Hash_Table_Types (<>); + + use HT_Types; + + with function Next (Node : Node_Access) return Node_Access; + + with procedure Set_Next + (Node : Node_Access; + Next : Node_Access); + + type Key_Type (<>) is limited private; + + with function Hash (Key : Key_Type) return Hash_Type; + + with function Equivalent_Keys + (Key : Key_Type; + Node : Node_Access) return Boolean; + +package Ada.Containers.Hash_Tables.Generic_Keys is + pragma Preelaborate; + + function Index + (HT : Hash_Table_Type; + Key : Key_Type) return Hash_Type; + pragma Inline (Index); + -- Returns the bucket number (array index value) for the given key + + procedure Delete_Key_Sans_Free + (HT : in out Hash_Table_Type; + Key : Key_Type; + X : out Node_Access); + -- Removes the node (if any) with the given key from the hash table, + -- without deallocating it. Program_Error is raised if the hash + -- table is busy. + + function Find (HT : Hash_Table_Type; Key : Key_Type) return Node_Access; + -- Returns the node (if any) corresponding to the given key + + generic + with function New_Node (Next : Node_Access) return Node_Access; + procedure Generic_Conditional_Insert + (HT : in out Hash_Table_Type; + Key : Key_Type; + Node : out Node_Access; + Inserted : out Boolean); + -- Attempts to insert a new node with the given key into the hash table. + -- If a node with that key already exists in the table, then that node + -- is returned and Inserted returns False. Otherwise New_Node is called + -- to allocate a new node, and Inserted returns True. Program_Error is + -- raised if the hash table is busy. + + generic + with function Hash (Node : Node_Access) return Hash_Type; + with procedure Assign (Node : Node_Access; Key : Key_Type); + procedure Generic_Replace_Element + (HT : in out Hash_Table_Type; + Node : Node_Access; + Key : Key_Type); + -- Assigns Key to Node, possibly changing its equivalence class. If Node + -- is in the same equivalence class as Key (that is, it's already in the + -- bucket implied by Key), then if the hash table is locked then + -- Program_Error is raised; otherwise Assign is called to assign Key to + -- Node. If Node is in a different bucket from Key, then Program_Error is + -- raised if the hash table is busy. Otherwise it Assigns Key to Node and + -- moves the Node from its current bucket to the bucket implied by Key. + -- Note that it is never proper to assign to Node a key value already + -- in the map, and so if Key is equivalent to some other node then + -- Program_Error is raised. + +end Ada.Containers.Hash_Tables.Generic_Keys; |