gcc/ada/a-cdlili.ads

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT LIBRARY COMPONENTS                          --
   4 --                                                                          --
   5 --   A D A . C O N T A I N E R S . D O U B L Y _ L I N K E D _ L I S T S    --
   6 --                                                                          --
   7 --                                 S p e c                                  --
   8 --                                                                          --
   9 --          Copyright (C) 2004-2005 Free Software Foundation, Inc.          --
  10 --                                                                          --
  11 -- This specification is derived from the Ada Reference Manual for use with --
  12 -- GNAT. The copyright notice above, and the license provisions that follow --
  13 -- apply solely to the  contents of the part following the private keyword. --
  14 --                                                                          --
  15 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
  16 -- terms of the  GNU General Public License as published  by the Free Soft- --
  17 -- ware  Foundation;  either version 2,  or (at your option) any later ver- --
  18 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  19 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  20 -- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
  21 -- for  more details.  You should have  received  a copy of the GNU General --
  22 -- Public License  distributed with GNAT;  see file COPYING.  If not, write --
  23 -- to  the  Free Software Foundation,  51  Franklin  Street,  Fifth  Floor, --
  24 -- Boston, MA 02110-1301, USA.                                              --
  25 --                                                                          --
  26 -- As a special exception,  if other files  instantiate  generics from this --
  27 -- unit, or you link  this unit with other files  to produce an executable, --
  28 -- this  unit  does not  by itself cause  the resulting  executable  to  be --
  29 -- covered  by the  GNU  General  Public  License.  This exception does not --
  30 -- however invalidate  any other reasons why  the executable file  might be --
  31 -- covered by the  GNU Public License.                                      --
  32 --                                                                          --
  33 -- This unit was originally developed by Matthew J Heaney.                  --
  34 ------------------------------------------------------------------------------
  35
  36 with Ada.Finalization;
  37 with Ada.Streams;
  38
  39 generic
  40    type Element_Type is private;
  41
  42    with function "=" (Left, Right : Element_Type)
  43       return Boolean is <>;
  44
  45 package Ada.Containers.Doubly_Linked_Lists is
  46    pragma Preelaborate;
  47
  48    type List is tagged private;
  49
  50    type Cursor is private;
  51
  52    Empty_List : constant List;
  53
  54    No_Element : constant Cursor;
  55
  56    function "=" (Left, Right : List) return Boolean;
  57
  58    function Length (Container : List) return Count_Type;
  59
  60    function Is_Empty (Container : List) return Boolean;
  61
  62    procedure Clear (Container : in out List);
  63
  64    function Element (Position : Cursor) return Element_Type;
  65
  66    procedure Query_Element
  67      (Position : Cursor;
  68       Process  : not null access procedure (Element : Element_Type));
  69
  70    procedure Update_Element
  71      (Position : Cursor;
  72       Process  : not null access procedure (Element : in out Element_Type));
  73
  74    procedure Replace_Element
  75      (Position : Cursor;
  76       By       : Element_Type);
  77
  78    procedure Move
  79      (Target : in out List;
  80       Source : in out List);
  81
  82    procedure Prepend
  83      (Container : in out List;
  84       New_Item  : Element_Type;
  85       Count     : Count_Type := 1);
  86
  87    procedure Append
  88      (Container : in out List;
  89       New_Item  : Element_Type;
  90       Count     : Count_Type := 1);
  91
  92    procedure Insert
  93      (Container : in out List;
  94       Before    : Cursor;
  95       New_Item  : Element_Type;
  96       Count     : Count_Type := 1);
  97
  98    procedure Insert
  99      (Container : in out List;
 100       Before    : Cursor;
 101       New_Item  : Element_Type;
 102       Position  : out Cursor;
 103       Count     : Count_Type := 1);
 104
 105    procedure Insert
 106      (Container : in out List;
 107       Before    : Cursor;
 108       Position  : out Cursor;
 109       Count     : Count_Type := 1);
 110
 111    procedure Delete
 112      (Container : in out List;
 113       Position  : in out Cursor;
 114       Count     : Count_Type := 1);
 115
 116    procedure Delete_First
 117      (Container : in out List;
 118       Count     : Count_Type := 1);
 119
 120    procedure Delete_Last
 121      (Container : in out List;
 122       Count     : Count_Type := 1);
 123
 124    generic
 125       with function "<" (Left, Right : Element_Type) return Boolean is <>;
 126    package Generic_Sorting is
 127
 128       function Is_Sorted (Container : List) return Boolean;
 129
 130       procedure Sort (Container : in out List);
 131
 132       procedure Merge (Target, Source : in out List);
 133
 134    end Generic_Sorting;
 135
 136    procedure Reverse_List (Container : in out List);
 137
 138    procedure Swap (I, J : Cursor);
 139
 140    procedure Swap_Links
 141      (Container : in out List;
 142       I, J      : Cursor);
 143
 144    procedure Splice
 145      (Target : in out List;
 146       Before : Cursor;
 147       Source : in out List);
 148
 149    procedure Splice
 150      (Target   : in out List;
 151       Before   : Cursor;
 152       Position : Cursor);
 153
 154    procedure Splice
 155      (Target   : in out List;
 156       Before   : Cursor;
 157       Source   : in out List;
 158       Position : in out Cursor);
 159
 160    function First (Container : List) return Cursor;
 161
 162    function First_Element (Container : List) return Element_Type;
 163
 164    function Last (Container : List) return Cursor;
 165
 166    function Last_Element (Container : List) return Element_Type;
 167
 168    function Contains
 169      (Container : List;
 170       Item      : Element_Type) return Boolean;
 171
 172    function Find
 173      (Container : List;
 174       Item      : Element_Type;
 175       Position  : Cursor := No_Element) return Cursor;
 176
 177    function Reverse_Find
 178      (Container : List;
 179       Item      : Element_Type;
 180       Position  : Cursor := No_Element) return Cursor;
 181
 182    function Next (Position : Cursor) return Cursor;
 183
 184    function Previous (Position : Cursor) return Cursor;
 185
 186    procedure Next (Position : in out Cursor);
 187
 188    procedure Previous (Position : in out Cursor);
 189
 190    function Has_Element (Position : Cursor) return Boolean;
 191
 192    procedure Iterate
 193      (Container : List;
 194       Process   : not null access procedure (Position : Cursor));
 195
 196    procedure Reverse_Iterate
 197      (Container : List;
 198       Process   : not null access procedure (Position : Cursor));
 199
 200 private
 201    type Node_Type;
 202    type Node_Access is access Node_Type;
 203
 204    type Node_Type is
 205       limited record
 206          Element : Element_Type;
 207          Next    : Node_Access;
 208          Prev    : Node_Access;
 209       end record;
 210
 211    use Ada.Finalization;
 212
 213    type List is
 214      new Controlled with record
 215         First  : Node_Access;
 216         Last   : Node_Access;
 217         Length : Count_Type := 0;
 218         Busy   : Natural := 0;
 219         Lock   : Natural := 0;
 220      end record;
 221
 222    procedure Adjust (Container : in out List);
 223
 224    procedure Finalize (Container : in out List) renames Clear;
 225
 226    use Ada.Streams;
 227
 228    procedure Read
 229      (Stream : access Root_Stream_Type'Class;
 230       Item   : out List);
 231
 232    for List'Read use Read;
 233
 234    procedure Write
 235      (Stream : access Root_Stream_Type'Class;
 236       Item   : List);
 237
 238    for List'Write use Write;
 239
 240    Empty_List : constant List := (Controlled with null, null, 0, 0, 0);
 241
 242    type List_Access is access constant List;
 243    for List_Access'Storage_Size use 0;
 244
 245    type Cursor is
 246       record
 247          Container : List_Access;
 248          Node      : Node_Access;
 249       end record;
 250
 251    No_Element : constant Cursor := Cursor'(null, null);
 252
 253 end Ada.Containers.Doubly_Linked_Lists;