File : a-cohata.ads
1 ------------------------------------------------------------------------------
2 -- --
3 -- GNAT LIBRARY COMPONENTS --
4 -- --
5 -- A D A . C O N T A I N E R S . H A S H _ T A B L E S --
6 -- --
7 -- S p e c --
8 -- --
9 -- Copyright (C) 2004-2015, Free Software Foundation, Inc. --
10 -- --
11 -- GNAT is free software; you can redistribute it and/or modify it under --
12 -- terms of the GNU General Public License as published by the Free Soft- --
13 -- ware Foundation; either version 3, or (at your option) any later ver- --
14 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
16 -- or FITNESS FOR A PARTICULAR PURPOSE. --
17 -- --
18 -- --
19 -- --
20 -- --
21 -- --
22 -- You should have received a copy of the GNU General Public License and --
23 -- a copy of the GCC Runtime Library Exception along with this program; --
24 -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
25 -- <http://www.gnu.org/licenses/>. --
26 -- --
27 -- This unit was originally developed by Matthew J Heaney. --
28 ------------------------------------------------------------------------------
29
30 -- This package declares the hash-table type used to implement hashed
31 -- containers.
32
33 with Ada.Containers.Helpers;
34
35 package Ada.Containers.Hash_Tables is
36 pragma Pure;
37 -- Declare Pure so this can be imported by Remote_Types packages
38
39 generic
40 type Node_Type (<>) is limited private;
41
42 type Node_Access is access Node_Type;
43
44 package Generic_Hash_Table_Types is
45
46 type Buckets_Type is array (Hash_Type range <>) of Node_Access;
47
48 type Buckets_Access is access all Buckets_Type;
49 for Buckets_Access'Storage_Size use 0;
50 -- Storage_Size of zero so this package can be Pure
51
52 type Hash_Table_Type is tagged record
53 Buckets : Buckets_Access := null;
54 Length : Count_Type := 0;
55 TC : aliased Helpers.Tamper_Counts;
56 end record;
57
58 package Implementation is new Helpers.Generic_Implementation;
59 end Generic_Hash_Table_Types;
60
61 generic
62 type Node_Type is private;
63 package Generic_Bounded_Hash_Table_Types is
64
65 type Nodes_Type is array (Count_Type range <>) of Node_Type;
66 type Buckets_Type is array (Hash_Type range <>) of Count_Type;
67
68 type Hash_Table_Type
69 (Capacity : Count_Type;
70 Modulus : Hash_Type) is
71 tagged record
72 Length : Count_Type := 0;
73 TC : aliased Helpers.Tamper_Counts;
74 Free : Count_Type'Base := -1;
75 Nodes : Nodes_Type (1 .. Capacity) := (others => <>);
76 Buckets : Buckets_Type (1 .. Modulus) := (others => 0);
77 end record;
78
79 package Implementation is new Helpers.Generic_Implementation;
80 end Generic_Bounded_Hash_Table_Types;
81
82 end Ada.Containers.Hash_Tables;