gcc/ada/xr_tabls.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT COMPILER COMPONENTS                         --
   4 --                                                                          --
   5 --                             X R  _ T A B L S                             --
   6 --                                                                          --
   7 --                                 B o d y                                  --
   8 --                                                                          --
   9 --          Copyright (C) 1998-2005 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 2,  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.  See the GNU General Public License --
  17 -- for  more details.  You should have  received  a copy of the GNU General --
  18 -- Public License  distributed with GNAT;  see file COPYING.  If not, write --
  19 -- to  the  Free Software Foundation,  51  Franklin  Street,  Fifth  Floor, --
  20 -- Boston, MA 02110-1301, USA.                                              --
  21 --                                                                          --
  22 -- GNAT was originally developed  by the GNAT team at  New York University. --
  23 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  24 --                                                                          --
  25 ------------------------------------------------------------------------------
  26
  27 with Types;    use Types;
  28 with Osint;
  29 with Hostparm;
  30
  31 with Ada.Unchecked_Conversion;
  32 with Ada.Unchecked_Deallocation;
  33 with Ada.Strings.Fixed;
  34 with Ada.Strings;
  35 with Ada.Text_IO;
  36 with Ada.Characters.Handling;   use Ada.Characters.Handling;
  37 with Ada.Strings.Unbounded;     use Ada.Strings.Unbounded;
  38
  39 with GNAT.OS_Lib;               use GNAT.OS_Lib;
  40 with GNAT.Directory_Operations; use GNAT.Directory_Operations;
  41 with GNAT.HTable;               use GNAT.HTable;
  42 with GNAT.Heap_Sort_G;
  43
  44 package body Xr_Tabls is
  45
  46    type HTable_Headers is range 1 .. 10000;
  47
  48    procedure Set_Next (E : File_Reference; Next : File_Reference);
  49    function  Next (E : File_Reference) return File_Reference;
  50    function  Get_Key (E : File_Reference) return Cst_String_Access;
  51    function  Hash (F : Cst_String_Access) return HTable_Headers;
  52    function  Equal (F1, F2 : Cst_String_Access) return Boolean;
  53    --  The five subprograms above are used to instanciate the static
  54    --  htable to store the files that should be processed.
  55
  56    package File_HTable is new GNAT.HTable.Static_HTable
  57      (Header_Num => HTable_Headers,
  58       Element    => File_Record,
  59       Elmt_Ptr   => File_Reference,
  60       Null_Ptr   => null,
  61       Set_Next   => Set_Next,
  62       Next       => Next,
  63       Key        => Cst_String_Access,
  64       Get_Key    => Get_Key,
  65       Hash       => Hash,
  66       Equal      => Equal);
  67    --  A hash table to store all the files referenced in the
  68    --  application.  The keys in this htable are the name of the files
  69    --  themselves, therefore it is assumed that the source path
  70    --  doesn't contain twice the same source or ALI file name
  71
  72    type Unvisited_Files_Record;
  73    type Unvisited_Files_Access is access Unvisited_Files_Record;
  74    type Unvisited_Files_Record is record
  75       File : File_Reference;
  76       Next : Unvisited_Files_Access;
  77    end record;
  78    --  A special list, in addition to File_HTable, that only stores
  79    --  the files that haven't been visited so far. Note that the File
  80    --  list points to some data in File_HTable, and thus should never be freed.
  81
  82    function Next (E : Declaration_Reference) return Declaration_Reference;
  83    procedure Set_Next (E, Next : Declaration_Reference);
  84    function  Get_Key (E : Declaration_Reference) return Cst_String_Access;
  85    --  The subprograms above are used to instanciate the static
  86    --  htable to store the entities that have been found in the application
  87
  88    package Entities_HTable is new GNAT.HTable.Static_HTable
  89      (Header_Num => HTable_Headers,
  90       Element    => Declaration_Record,
  91       Elmt_Ptr   => Declaration_Reference,
  92       Null_Ptr   => null,
  93       Set_Next   => Set_Next,
  94       Next       => Next,
  95       Key        => Cst_String_Access,
  96       Get_Key    => Get_Key,
  97       Hash       => Hash,
  98       Equal      => Equal);
  99    --  A hash table to store all the entities defined in the
 100    --  application. For each entity, we store a list of its reference
 101    --  locations as well.
 102    --  The keys in this htable should be created with Key_From_Ref,
 103    --  and are the file, line and column of the declaration, which are
 104    --  unique for every entity.
 105
 106    Entities_Count : Natural := 0;
 107    --  Number of entities in Entities_HTable. This is used in the end
 108    --  when sorting the table.
 109
 110    Longest_File_Name_In_Table : Natural := 0;
 111    Unvisited_Files            : Unvisited_Files_Access := null;
 112    Directories                : Project_File_Ptr;
 113    Default_Match              : Boolean := False;
 114    --  The above need commenting ???
 115
 116    function Parse_Gnatls_Src return String;
 117    --  Return the standard source directories (taking into account the
 118    --  ADA_INCLUDE_PATH environment variable, if Osint.Add_Default_Search_Dirs
 119    --  was called first).
 120
 121    function Parse_Gnatls_Obj return String;
 122    --  Return the standard object directories (taking into account the
 123    --  ADA_OBJECTS_PATH environment variable).
 124
 125    function Key_From_Ref
 126      (File_Ref  : File_Reference;
 127       Line      : Natural;
 128       Column    : Natural)
 129       return      String;
 130    --  Return a key for the symbol declared at File_Ref, Line,
 131    --  Column. This key should be used for lookup in Entity_HTable
 132
 133    function Is_Less_Than (Decl1, Decl2 : Declaration_Reference) return Boolean;
 134    --  Compare two declarations. The comparison is case-insensitive.
 135
 136    function Is_Less_Than (Ref1, Ref2 : Reference) return Boolean;
 137    --  Compare two references
 138
 139    procedure Store_References
 140      (Decl            : Declaration_Reference;
 141       Get_Writes      : Boolean := False;
 142       Get_Reads       : Boolean := False;
 143       Get_Bodies      : Boolean := False;
 144       Get_Declaration : Boolean := False;
 145       Arr             : in out Reference_Array;
 146       Index           : in out Natural);
 147    --  Store in Arr, starting at Index, all the references to Decl.
 148    --  The Get_* parameters can be used to indicate which references should be
 149    --  stored.
 150    --  Constraint_Error will be raised if Arr is not big enough.
 151
 152    procedure Sort (Arr : in out Reference_Array);
 153    --  Sort an array of references.
 154    --  Arr'First must be 1.
 155
 156    --------------
 157    -- Set_Next --
 158    --------------
 159
 160    procedure Set_Next (E : File_Reference; Next : File_Reference) is
 161    begin
 162       E.Next := Next;
 163    end Set_Next;
 164
 165    procedure Set_Next
 166      (E : Declaration_Reference; Next : Declaration_Reference) is
 167    begin
 168       E.Next := Next;
 169    end Set_Next;
 170
 171    -------------
 172    -- Get_Key --
 173    -------------
 174
 175    function Get_Key (E : File_Reference) return Cst_String_Access is
 176    begin
 177       return E.File;
 178    end Get_Key;
 179
 180    function Get_Key (E : Declaration_Reference) return Cst_String_Access is
 181    begin
 182       return E.Key;
 183    end Get_Key;
 184
 185    ----------
 186    -- Hash --
 187    ----------
 188
 189    function Hash (F : Cst_String_Access) return HTable_Headers is
 190       function H is new GNAT.HTable.Hash (HTable_Headers);
 191
 192    begin
 193       return H (F.all);
 194    end Hash;
 195
 196    -----------
 197    -- Equal --
 198    -----------
 199
 200    function Equal (F1, F2 : Cst_String_Access) return Boolean is
 201    begin
 202       return F1.all = F2.all;
 203    end Equal;
 204
 205    ------------------
 206    -- Key_From_Ref --
 207    ------------------
 208
 209    function Key_From_Ref
 210      (File_Ref : File_Reference;
 211       Line     : Natural;
 212       Column   : Natural)
 213       return     String
 214    is
 215    begin
 216       return File_Ref.File.all & Natural'Image (Line) & Natural'Image (Column);
 217    end Key_From_Ref;
 218
 219    ---------------------
 220    -- Add_Declaration --
 221    ---------------------
 222
 223    function Add_Declaration
 224      (File_Ref     : File_Reference;
 225       Symbol       : String;
 226       Line         : Natural;
 227       Column       : Natural;
 228       Decl_Type    : Character;
 229       Remove_Only  : Boolean := False;
 230       Symbol_Match : Boolean := True)
 231       return         Declaration_Reference
 232    is
 233       procedure Unchecked_Free is new Ada.Unchecked_Deallocation
 234         (Declaration_Record, Declaration_Reference);
 235
 236       Key : aliased constant String := Key_From_Ref (File_Ref, Line, Column);
 237
 238       New_Decl : Declaration_Reference :=
 239                    Entities_HTable.Get (Key'Unchecked_Access);
 240
 241       Is_Parameter : Boolean := False;
 242
 243    begin
 244       --  Insert the Declaration in the table. There might already be a
 245       --  declaration in the table if the entity is a parameter, so we
 246       --  need to check that first.
 247
 248       if New_Decl /= null and then New_Decl.Symbol_Length = 0 then
 249          Is_Parameter := New_Decl.Is_Parameter;
 250          Entities_HTable.Remove (Key'Unrestricted_Access);
 251          Entities_Count := Entities_Count - 1;
 252          Free (New_Decl.Key);
 253          Unchecked_Free (New_Decl);
 254          New_Decl := null;
 255       end if;
 256
 257       --  The declaration might also already be there for parent types. In
 258       --  this case, we should keep the entry, since some other entries are
 259       --  pointing to it.
 260
 261       if New_Decl = null
 262         and then not Remove_Only
 263       then
 264          New_Decl :=
 265            new Declaration_Record'
 266              (Symbol_Length => Symbol'Length,
 267               Symbol        => Symbol,
 268               Key           => new String'(Key),
 269               Decl          => new Reference_Record'
 270                                      (File          => File_Ref,
 271                                       Line          => Line,
 272                                       Column        => Column,
 273                                       Source_Line   => null,
 274                                       Next          => null),
 275               Is_Parameter  => Is_Parameter,
 276               Decl_Type     => Decl_Type,
 277               Body_Ref      => null,
 278               Ref_Ref       => null,
 279               Modif_Ref     => null,
 280               Match         => Symbol_Match
 281                                  and then
 282                                    (Default_Match
 283                                      or else Match (File_Ref, Line, Column)),
 284               Par_Symbol    => null,
 285               Next          => null);
 286
 287          Entities_HTable.Set (New_Decl);
 288          Entities_Count := Entities_Count + 1;
 289
 290          if New_Decl.Match then
 291             Longest_File_Name_In_Table :=
 292               Natural'Max (File_Ref.File'Length, Longest_File_Name_In_Table);
 293          end if;
 294
 295       elsif New_Decl /= null
 296         and then not New_Decl.Match
 297       then
 298          New_Decl.Match := Default_Match
 299            or else Match (File_Ref, Line, Column);
 300       end if;
 301
 302       return New_Decl;
 303    end Add_Declaration;
 304
 305    ----------------------
 306    -- Add_To_Xref_File --
 307    ----------------------
 308
 309    function Add_To_Xref_File
 310      (File_Name       : String;
 311       Visited         : Boolean := True;
 312       Emit_Warning    : Boolean := False;
 313       Gnatchop_File   : String  := "";
 314       Gnatchop_Offset : Integer := 0) return File_Reference
 315    is
 316       Base    : aliased constant String := Base_Name (File_Name);
 317       Dir     : constant String := Dir_Name (File_Name);
 318       Dir_Acc : GNAT.OS_Lib.String_Access   := null;
 319       Ref     : File_Reference;
 320
 321    begin
 322       --  Do we have a directory name as well?
 323
 324       if File_Name /= Base then
 325          Dir_Acc := new String'(Dir);
 326       end if;
 327
 328       Ref := File_HTable.Get (Base'Unchecked_Access);
 329       if Ref = null then
 330          Ref := new File_Record'
 331            (File            => new String'(Base),
 332             Dir             => Dir_Acc,
 333             Lines           => null,
 334             Visited         => Visited,
 335             Emit_Warning    => Emit_Warning,
 336             Gnatchop_File   => new String'(Gnatchop_File),
 337             Gnatchop_Offset => Gnatchop_Offset,
 338             Next            => null);
 339          File_HTable.Set (Ref);
 340
 341          if not Visited then
 342
 343             --  Keep a separate list for faster access
 344
 345             Set_Unvisited (Ref);
 346          end if;
 347       end if;
 348       return Ref;
 349    end Add_To_Xref_File;
 350
 351    --------------
 352    -- Add_Line --
 353    --------------
 354
 355    procedure Add_Line
 356      (File   : File_Reference;
 357       Line   : Natural;
 358       Column : Natural)
 359    is
 360    begin
 361       File.Lines := new Ref_In_File'(Line   => Line,
 362                                      Column => Column,
 363                                      Next   => File.Lines);
 364    end Add_Line;
 365
 366    ----------------
 367    -- Add_Parent --
 368    ----------------
 369
 370    procedure Add_Parent
 371      (Declaration : in out Declaration_Reference;
 372       Symbol      : String;
 373       Line        : Natural;
 374       Column      : Natural;
 375       File_Ref    : File_Reference)
 376    is
 377    begin
 378       Declaration.Par_Symbol :=
 379         Add_Declaration
 380           (File_Ref, Symbol, Line, Column,
 381            Decl_Type    => ' ',
 382            Symbol_Match => False);
 383    end Add_Parent;
 384
 385    -------------------
 386    -- Add_Reference --
 387    -------------------
 388
 389    procedure Add_Reference
 390      (Declaration   : Declaration_Reference;
 391       File_Ref      : File_Reference;
 392       Line          : Natural;
 393       Column        : Natural;
 394       Ref_Type      : Character;
 395       Labels_As_Ref : Boolean)
 396    is
 397       New_Ref : Reference;
 398
 399    begin
 400       case Ref_Type is
 401          when 'b' | 'c' | 'm' | 'r' | 'i' | ' ' | 'x' =>
 402             null;
 403
 404          when 'l' | 'w' =>
 405             if not Labels_As_Ref then
 406                return;
 407             end if;
 408
 409          when '=' | '<' | '>' | '^' =>
 410
 411             --  Create a dummy declaration in the table to report it as a
 412             --  parameter. Note that the current declaration for the subprogram
 413             --  comes before the declaration of the parameter.
 414
 415             declare
 416                Key      : constant String :=
 417                             Key_From_Ref (File_Ref, Line, Column);
 418                New_Decl : Declaration_Reference;
 419
 420             begin
 421                New_Decl := new Declaration_Record'
 422                  (Symbol_Length => 0,
 423                   Symbol        => "",
 424                   Key           => new String'(Key),
 425                   Decl          => null,
 426                   Is_Parameter  => True,
 427                   Decl_Type     => ' ',
 428                   Body_Ref      => null,
 429                   Ref_Ref       => null,
 430                   Modif_Ref     => null,
 431                   Match         => False,
 432                   Par_Symbol    => null,
 433                   Next          => null);
 434                Entities_HTable.Set (New_Decl);
 435                Entities_Count := Entities_Count + 1;
 436             end;
 437
 438          when 'e' | 'z' | 't' | 'p' | 'P' | 'k' | 'd' =>
 439             return;
 440
 441          when others    =>
 442             Ada.Text_IO.Put_Line ("Unknown reference type: " & Ref_Type);
 443             return;
 444       end case;
 445
 446       New_Ref := new Reference_Record'
 447         (File        => File_Ref,
 448          Line        => Line,
 449          Column      => Column,
 450          Source_Line => null,
 451          Next        => null);
 452
 453       --  We can insert the reference in the list directly, since all
 454       --  the references will appear only once in the ALI file
 455       --  corresponding to the file where they are referenced.
 456       --  This saves a lot of time compared to checking the list to check
 457       --  if it exists.
 458
 459       case Ref_Type is
 460          when 'b' | 'c' =>
 461             New_Ref.Next          := Declaration.Body_Ref;
 462             Declaration.Body_Ref  := New_Ref;
 463
 464          when 'r' | 'i' | 'l' | ' ' | 'x' | 'w' =>
 465             New_Ref.Next          := Declaration.Ref_Ref;
 466             Declaration.Ref_Ref   := New_Ref;
 467
 468          when 'm' =>
 469             New_Ref.Next          := Declaration.Modif_Ref;
 470             Declaration.Modif_Ref := New_Ref;
 471
 472          when others =>
 473             null;
 474       end case;
 475
 476       if not Declaration.Match then
 477          Declaration.Match := Match (File_Ref, Line, Column);
 478       end if;
 479
 480       if Declaration.Match then
 481          Longest_File_Name_In_Table :=
 482            Natural'Max (File_Ref.File'Length, Longest_File_Name_In_Table);
 483       end if;
 484    end Add_Reference;
 485
 486    -------------------
 487    -- ALI_File_Name --
 488    -------------------
 489
 490    function ALI_File_Name (Ada_File_Name : String) return String is
 491
 492       --  ??? Should ideally be based on the naming scheme defined in
 493       --  project files.
 494
 495       Index : constant Natural :=
 496                 Ada.Strings.Fixed.Index
 497                   (Ada_File_Name, ".", Going => Ada.Strings.Backward);
 498
 499    begin
 500       if Index /= 0 then
 501          return Ada_File_Name (Ada_File_Name'First .. Index) & "ali";
 502       else
 503          return Ada_File_Name & ".ali";
 504       end if;
 505    end ALI_File_Name;
 506
 507    ------------------
 508    -- Is_Less_Than --
 509    ------------------
 510
 511    function Is_Less_Than (Ref1, Ref2 : Reference) return Boolean is
 512    begin
 513       if Ref1 = null then
 514          return False;
 515       elsif Ref2 = null then
 516          return True;
 517       end if;
 518
 519       if Ref1.File.File.all < Ref2.File.File.all then
 520          return True;
 521
 522       elsif Ref1.File.File.all = Ref2.File.File.all then
 523          return (Ref1.Line < Ref2.Line
 524                  or else (Ref1.Line = Ref2.Line
 525                           and then Ref1.Column < Ref2.Column));
 526       end if;
 527
 528       return False;
 529    end Is_Less_Than;
 530
 531    ------------------
 532    -- Is_Less_Than --
 533    ------------------
 534
 535    function Is_Less_Than (Decl1, Decl2 : Declaration_Reference) return Boolean
 536    is
 537       --  We cannot store the data case-insensitive in the table,
 538       --  since we wouldn't be able to find the right casing for the
 539       --  display later on.
 540
 541       S1 : constant String := To_Lower (Decl1.Symbol);
 542       S2 : constant String := To_Lower (Decl2.Symbol);
 543
 544    begin
 545       if S1 < S2 then
 546          return True;
 547       elsif S1 > S2 then
 548          return False;
 549       end if;
 550
 551       return Decl1.Key.all < Decl2.Key.all;
 552    end Is_Less_Than;
 553
 554    -------------------------
 555    -- Create_Project_File --
 556    -------------------------
 557
 558    procedure Create_Project_File (Name : String) is
 559       Obj_Dir     : Unbounded_String := Null_Unbounded_String;
 560       Src_Dir     : Unbounded_String := Null_Unbounded_String;
 561       Build_Dir   : GNAT.OS_Lib.String_Access := new String'("");
 562
 563       F           : File_Descriptor;
 564       Len         : Positive;
 565       File_Name   : aliased String := Name & ASCII.NUL;
 566
 567    begin
 568       --  Read the size of the file
 569
 570       F := Open_Read (File_Name'Address, Text);
 571
 572       --  Project file not found
 573
 574       if F /= Invalid_FD then
 575          Len := Positive (File_Length (F));
 576
 577          declare
 578             Buffer : String (1 .. Len);
 579             Index  : Positive := Buffer'First;
 580             Last   : Positive;
 581
 582          begin
 583             Len := Read (F, Buffer'Address, Len);
 584             Close (F);
 585
 586             --  First, look for Build_Dir, since all the source and object
 587             --  path are relative to it.
 588
 589             while Index <= Buffer'Last loop
 590
 591                --  Find the end of line
 592
 593                Last := Index;
 594                while Last <= Buffer'Last
 595                  and then Buffer (Last) /= ASCII.LF
 596                  and then Buffer (Last) /= ASCII.CR
 597                loop
 598                   Last := Last + 1;
 599                end loop;
 600
 601                if Index <= Buffer'Last - 9
 602                  and then Buffer (Index .. Index + 9) = "build_dir="
 603                then
 604                   Index := Index + 10;
 605                   while Index <= Last
 606                     and then (Buffer (Index) = ' '
 607                               or else Buffer (Index) = ASCII.HT)
 608                   loop
 609                      Index := Index + 1;
 610                   end loop;
 611
 612                   Free (Build_Dir);
 613                   Build_Dir := new String'(Buffer (Index .. Last - 1));
 614                end if;
 615
 616                Index := Last + 1;
 617
 618                --  In case we had a ASCII.CR/ASCII.LF end of line, skip the
 619                --  remaining symbol
 620
 621                if Index <= Buffer'Last
 622                  and then Buffer (Index) = ASCII.LF
 623                then
 624                   Index := Index + 1;
 625                end if;
 626             end loop;
 627
 628             --  Now parse the source and object paths
 629
 630             Index := Buffer'First;
 631             while Index <= Buffer'Last loop
 632
 633                --  Find the end of line
 634
 635                Last := Index;
 636                while Last <= Buffer'Last
 637                  and then Buffer (Last) /= ASCII.LF
 638                  and then Buffer (Last) /= ASCII.CR
 639                loop
 640                   Last := Last + 1;
 641                end loop;
 642
 643                if Index <= Buffer'Last - 7
 644                  and then Buffer (Index .. Index + 7) = "src_dir="
 645                then
 646                   Append (Src_Dir, Normalize_Pathname
 647                           (Name      => Ada.Strings.Fixed.Trim
 648                            (Buffer (Index + 8 .. Last - 1), Ada.Strings.Both),
 649                            Directory => Build_Dir.all) & Path_Separator);
 650
 651                elsif Index <= Buffer'Last - 7
 652                  and then Buffer (Index .. Index + 7) = "obj_dir="
 653                then
 654                   Append (Obj_Dir, Normalize_Pathname
 655                           (Name      => Ada.Strings.Fixed.Trim
 656                            (Buffer (Index + 8 .. Last - 1), Ada.Strings.Both),
 657                            Directory => Build_Dir.all) & Path_Separator);
 658                end if;
 659
 660                --  In case we had a ASCII.CR/ASCII.LF end of line, skip the
 661                --  remaining symbol
 662                Index := Last + 1;
 663
 664                if Index <= Buffer'Last
 665                  and then Buffer (Index) = ASCII.LF
 666                then
 667                   Index := Index + 1;
 668                end if;
 669             end loop;
 670          end;
 671       end if;
 672
 673       Osint.Add_Default_Search_Dirs;
 674
 675       declare
 676          Src : constant String := Parse_Gnatls_Src;
 677          Obj : constant String := Parse_Gnatls_Obj;
 678
 679       begin
 680          Directories := new Project_File'
 681            (Src_Dir_Length     => Length (Src_Dir) + Src'Length,
 682             Obj_Dir_Length     => Length (Obj_Dir) + Obj'Length,
 683             Src_Dir            => To_String (Src_Dir) & Src,
 684             Obj_Dir            => To_String (Obj_Dir) & Obj,
 685             Src_Dir_Index      => 1,
 686             Obj_Dir_Index      => 1,
 687             Last_Obj_Dir_Start => 0);
 688       end;
 689
 690       Free (Build_Dir);
 691    end Create_Project_File;
 692
 693    ---------------------
 694    -- Current_Obj_Dir --
 695    ---------------------
 696
 697    function Current_Obj_Dir return String is
 698    begin
 699       return Directories.Obj_Dir
 700         (Directories.Last_Obj_Dir_Start .. Directories.Obj_Dir_Index - 2);
 701    end Current_Obj_Dir;
 702
 703    ----------------
 704    -- Get_Column --
 705    ----------------
 706
 707    function Get_Column (Decl : Declaration_Reference) return String is
 708    begin
 709       return Ada.Strings.Fixed.Trim (Natural'Image (Decl.Decl.Column),
 710                                      Ada.Strings.Left);
 711    end Get_Column;
 712
 713    function Get_Column (Ref : Reference) return String is
 714    begin
 715       return Ada.Strings.Fixed.Trim (Natural'Image (Ref.Column),
 716                                      Ada.Strings.Left);
 717    end Get_Column;
 718
 719    ---------------------
 720    -- Get_Declaration --
 721    ---------------------
 722
 723    function Get_Declaration
 724      (File_Ref : File_Reference;
 725       Line     : Natural;
 726       Column   : Natural)
 727       return     Declaration_Reference
 728    is
 729       Key : aliased constant String := Key_From_Ref (File_Ref, Line, Column);
 730
 731    begin
 732       return Entities_HTable.Get (Key'Unchecked_Access);
 733    end Get_Declaration;
 734
 735    ----------------------
 736    -- Get_Emit_Warning --
 737    ----------------------
 738
 739    function Get_Emit_Warning (File : File_Reference) return Boolean is
 740    begin
 741       return File.Emit_Warning;
 742    end Get_Emit_Warning;
 743
 744    --------------
 745    -- Get_File --
 746    --------------
 747
 748    function Get_File
 749      (Decl     : Declaration_Reference;
 750       With_Dir : Boolean := False) return String
 751    is
 752    begin
 753       return Get_File (Decl.Decl.File, With_Dir);
 754    end Get_File;
 755
 756    function Get_File
 757      (Ref      : Reference;
 758       With_Dir : Boolean := False) return String
 759    is
 760    begin
 761       return Get_File (Ref.File, With_Dir);
 762    end Get_File;
 763
 764    function Get_File
 765      (File     : File_Reference;
 766       With_Dir : in Boolean := False;
 767       Strip    : Natural    := 0) return String
 768    is
 769       Tmp : GNAT.OS_Lib.String_Access;
 770
 771       function Internal_Strip (Full_Name : String) return String;
 772       --  Internal function to process the Strip parameter
 773
 774       --------------------
 775       -- Internal_Strip --
 776       --------------------
 777
 778       function Internal_Strip (Full_Name : String) return String is
 779          Unit_End        : Natural;
 780          Extension_Start : Natural;
 781          S               : Natural;
 782
 783       begin
 784          if Strip = 0 then
 785             return Full_Name;
 786          end if;
 787
 788          --  Isolate the file extension
 789
 790          Extension_Start := Full_Name'Last;
 791          while Extension_Start >= Full_Name'First
 792            and then Full_Name (Extension_Start) /= '.'
 793          loop
 794             Extension_Start := Extension_Start - 1;
 795          end loop;
 796
 797          --  Strip the right number of subunit_names
 798
 799          S := Strip;
 800          Unit_End := Extension_Start - 1;
 801          while Unit_End >= Full_Name'First
 802            and then S > 0
 803          loop
 804             if Full_Name (Unit_End) = '-' then
 805                S := S - 1;
 806             end if;
 807
 808             Unit_End := Unit_End - 1;
 809          end loop;
 810
 811          if Unit_End < Full_Name'First then
 812             return "";
 813          else
 814             return Full_Name (Full_Name'First .. Unit_End)
 815               & Full_Name (Extension_Start .. Full_Name'Last);
 816          end if;
 817       end Internal_Strip;
 818
 819    --  Start of processing for Get_File;
 820
 821    begin
 822       --  If we do not want the full path name
 823
 824       if not With_Dir then
 825          return Internal_Strip (File.File.all);
 826       end if;
 827
 828       if File.Dir = null then
 829          if Ada.Strings.Fixed.Tail (File.File.all, 3) = "ali" then
 830             Tmp := Locate_Regular_File
 831               (Internal_Strip (File.File.all), Directories.Obj_Dir);
 832          else
 833             Tmp := Locate_Regular_File
 834               (File.File.all, Directories.Src_Dir);
 835          end if;
 836
 837          if Tmp = null then
 838             File.Dir := new String'("");
 839          else
 840             File.Dir := new String'(Dir_Name (Tmp.all));
 841             Free (Tmp);
 842          end if;
 843       end if;
 844
 845       return Internal_Strip (File.Dir.all & File.File.all);
 846    end Get_File;
 847
 848    ------------------
 849    -- Get_File_Ref --
 850    ------------------
 851
 852    function Get_File_Ref (Ref : Reference) return File_Reference is
 853    begin
 854       return Ref.File;
 855    end Get_File_Ref;
 856
 857    -----------------------
 858    -- Get_Gnatchop_File --
 859    -----------------------
 860
 861    function Get_Gnatchop_File
 862      (File     : File_Reference;
 863       With_Dir : Boolean := False)
 864       return     String
 865    is
 866    begin
 867       if File.Gnatchop_File.all = "" then
 868          return Get_File (File, With_Dir);
 869       else
 870          return File.Gnatchop_File.all;
 871       end if;
 872    end Get_Gnatchop_File;
 873
 874    function Get_Gnatchop_File
 875      (Ref      : Reference;
 876       With_Dir : Boolean := False)
 877       return     String
 878    is
 879    begin
 880       return Get_Gnatchop_File (Ref.File, With_Dir);
 881    end Get_Gnatchop_File;
 882
 883    function Get_Gnatchop_File
 884      (Decl     : Declaration_Reference;
 885       With_Dir : Boolean := False)
 886       return     String
 887    is
 888    begin
 889       return Get_Gnatchop_File (Decl.Decl.File, With_Dir);
 890    end Get_Gnatchop_File;
 891
 892    --------------
 893    -- Get_Line --
 894    --------------
 895
 896    function Get_Line (Decl : Declaration_Reference) return String is
 897    begin
 898       return Ada.Strings.Fixed.Trim (Natural'Image (Decl.Decl.Line),
 899                                      Ada.Strings.Left);
 900    end Get_Line;
 901
 902    function Get_Line (Ref : Reference) return String is
 903    begin
 904       return Ada.Strings.Fixed.Trim (Natural'Image (Ref.Line),
 905                                      Ada.Strings.Left);
 906    end Get_Line;
 907
 908    ----------------
 909    -- Get_Parent --
 910    ----------------
 911
 912    function Get_Parent
 913      (Decl : Declaration_Reference)
 914       return Declaration_Reference
 915    is
 916    begin
 917       return Decl.Par_Symbol;
 918    end Get_Parent;
 919
 920    ---------------------
 921    -- Get_Source_Line --
 922    ---------------------
 923
 924    function Get_Source_Line (Ref : Reference) return String is
 925    begin
 926       if Ref.Source_Line /= null then
 927          return Ref.Source_Line.all;
 928       else
 929          return "";
 930       end if;
 931    end Get_Source_Line;
 932
 933    function Get_Source_Line (Decl : Declaration_Reference) return String is
 934    begin
 935       if Decl.Decl.Source_Line /= null then
 936          return Decl.Decl.Source_Line.all;
 937       else
 938          return "";
 939       end if;
 940    end Get_Source_Line;
 941
 942    ----------------
 943    -- Get_Symbol --
 944    ----------------
 945
 946    function Get_Symbol (Decl : Declaration_Reference) return String is
 947    begin
 948       return Decl.Symbol;
 949    end Get_Symbol;
 950
 951    --------------
 952    -- Get_Type --
 953    --------------
 954
 955    function Get_Type (Decl : Declaration_Reference) return Character is
 956    begin
 957       return Decl.Decl_Type;
 958    end Get_Type;
 959
 960    ----------
 961    -- Sort --
 962    ----------
 963
 964    procedure Sort (Arr : in out Reference_Array) is
 965       Tmp : Reference;
 966
 967       function Lt (Op1, Op2 : Natural) return Boolean;
 968       procedure Move (From, To : Natural);
 969       --  See GNAT.Heap_Sort_G
 970
 971       --------
 972       -- Lt --
 973       --------
 974
 975       function Lt (Op1, Op2 : Natural) return Boolean is
 976       begin
 977          if Op1 = 0 then
 978             return Is_Less_Than (Tmp, Arr (Op2));
 979          elsif Op2 = 0 then
 980             return Is_Less_Than (Arr (Op1), Tmp);
 981          else
 982             return Is_Less_Than (Arr (Op1), Arr (Op2));
 983          end if;
 984       end Lt;
 985
 986       ----------
 987       -- Move --
 988       ----------
 989
 990       procedure Move (From, To : Natural) is
 991       begin
 992          if To = 0 then
 993             Tmp := Arr (From);
 994          elsif From = 0 then
 995             Arr (To) := Tmp;
 996          else
 997             Arr (To) := Arr (From);
 998          end if;
 999       end Move;
1000
1001       package Ref_Sort is new GNAT.Heap_Sort_G (Move, Lt);
1002
1003    --  Start of processing for Sort
1004
1005    begin
1006       Ref_Sort.Sort (Arr'Last);
1007    end Sort;
1008
1009    -----------------------
1010    -- Grep_Source_Files --
1011    -----------------------
1012
1013    procedure Grep_Source_Files is
1014       Length       : Natural := 0;
1015       Decl         : Declaration_Reference := Entities_HTable.Get_First;
1016       Arr          : Reference_Array_Access;
1017       Index        : Natural;
1018       End_Index    : Natural;
1019       Current_File : File_Reference;
1020       Current_Line : Cst_String_Access;
1021       Buffer       : GNAT.OS_Lib.String_Access;
1022       Ref          : Reference;
1023       Line         : Natural;
1024
1025    begin
1026       --  Create a temporary array, where all references will be
1027       --  sorted by files. This way, we only have to read the source
1028       --  files once.
1029
1030       while Decl /= null loop
1031
1032          --  Add 1 for the declaration itself
1033
1034          Length := Length + References_Count (Decl, True, True, True) + 1;
1035          Decl := Entities_HTable.Get_Next;
1036       end loop;
1037
1038       Arr := new Reference_Array (1 .. Length);
1039       Index := Arr'First;
1040
1041       Decl := Entities_HTable.Get_First;
1042       while Decl /= null loop
1043          Store_References (Decl, True, True, True, True, Arr.all, Index);
1044          Decl := Entities_HTable.Get_Next;
1045       end loop;
1046
1047       Sort (Arr.all);
1048
1049       --  Now traverse the whole array and find the appropriate source
1050       --  lines.
1051
1052       for R in Arr'Range loop
1053          Ref := Arr (R);
1054
1055          if Ref.File /= Current_File then
1056             Free (Buffer);
1057             begin
1058                Read_File (Get_File (Ref.File, With_Dir => True), Buffer);
1059                End_Index := Buffer'First - 1;
1060                Line := 0;
1061             exception
1062                when Ada.Text_IO.Name_Error | Ada.Text_IO.End_Error =>
1063                   Line := Natural'Last;
1064             end;
1065             Current_File := Ref.File;
1066          end if;
1067
1068          if Ref.Line > Line then
1069
1070             --  Do not free Current_Line, it is referenced by the last
1071             --  Ref we processed.
1072
1073             loop
1074                Index := End_Index + 1;
1075
1076                loop
1077                   End_Index := End_Index + 1;
1078                   exit when End_Index > Buffer'Last
1079                     or else Buffer (End_Index) = ASCII.LF;
1080                end loop;
1081
1082                --  Skip spaces at beginning of line
1083
1084                while Index < End_Index and then
1085                  (Buffer (Index) = ' ' or else Buffer (Index) = ASCII.HT)
1086                loop
1087                   Index := Index + 1;
1088                end loop;
1089
1090                Line := Line + 1;
1091                exit when Ref.Line = Line;
1092             end loop;
1093
1094             Current_Line := new String'(Buffer (Index .. End_Index - 1));
1095          end if;
1096
1097          Ref.Source_Line := Current_Line;
1098       end loop;
1099
1100       Free (Buffer);
1101       Free (Arr);
1102    end Grep_Source_Files;
1103
1104    ---------------
1105    -- Read_File --
1106    ---------------
1107
1108    procedure Read_File
1109      (File_Name : String;
1110       Contents  : out GNAT.OS_Lib.String_Access)
1111    is
1112       Name_0 : constant String := File_Name & ASCII.NUL;
1113       FD     : constant File_Descriptor := Open_Read (Name_0'Address, Binary);
1114       Length : Natural;
1115
1116    begin
1117       if FD = Invalid_FD then
1118          raise Ada.Text_IO.Name_Error;
1119       end if;
1120
1121       --  Include room for EOF char
1122
1123       Length := Natural (File_Length (FD));
1124
1125       declare
1126          Buffer    : String (1 .. Length + 1);
1127          This_Read : Integer;
1128          Read_Ptr  : Natural := 1;
1129
1130       begin
1131          loop
1132             This_Read := Read (FD,
1133                                A => Buffer (Read_Ptr)'Address,
1134                                N => Length + 1 - Read_Ptr);
1135             Read_Ptr := Read_Ptr + Integer'Max (This_Read, 0);
1136             exit when This_Read <= 0;
1137          end loop;
1138
1139          Buffer (Read_Ptr) := EOF;
1140          Contents := new String'(Buffer (1 .. Read_Ptr));
1141
1142          --  Things are not simple on VMS due to the plethora of file types
1143          --  and organizations. It seems clear that there shouldn't be more
1144          --  bytes read than are contained in the file though.
1145
1146          if (Hostparm.OpenVMS and then Read_Ptr > Length + 1)
1147            or else (not Hostparm.OpenVMS and then Read_Ptr /= Length + 1)
1148          then
1149             raise Ada.Text_IO.End_Error;
1150          end if;
1151
1152          Close (FD);
1153       end;
1154    end Read_File;
1155
1156    -----------------------
1157    -- Longest_File_Name --
1158    -----------------------
1159
1160    function Longest_File_Name return Natural is
1161    begin
1162       return Longest_File_Name_In_Table;
1163    end Longest_File_Name;
1164
1165    -----------
1166    -- Match --
1167    -----------
1168
1169    function Match
1170      (File   : File_Reference;
1171       Line   : Natural;
1172       Column : Natural)
1173       return   Boolean
1174    is
1175       Ref : Ref_In_File_Ptr := File.Lines;
1176
1177    begin
1178       while Ref /= null loop
1179          if (Ref.Line = 0 or else Ref.Line = Line)
1180            and then (Ref.Column = 0 or else Ref.Column = Column)
1181          then
1182             return True;
1183          end if;
1184
1185          Ref := Ref.Next;
1186       end loop;
1187
1188       return False;
1189    end Match;
1190
1191    -----------
1192    -- Match --
1193    -----------
1194
1195    function Match (Decl : Declaration_Reference) return Boolean is
1196    begin
1197       return Decl.Match;
1198    end Match;
1199
1200    ----------
1201    -- Next --
1202    ----------
1203
1204    function Next (E : File_Reference) return File_Reference is
1205    begin
1206       return E.Next;
1207    end Next;
1208
1209    function Next (E : Declaration_Reference) return Declaration_Reference is
1210    begin
1211       return E.Next;
1212    end Next;
1213
1214    ------------------
1215    -- Next_Obj_Dir --
1216    ------------------
1217
1218    function Next_Obj_Dir return String is
1219       First : constant Integer := Directories.Obj_Dir_Index;
1220       Last  : Integer;
1221
1222    begin
1223       Last := Directories.Obj_Dir_Index;
1224
1225       if Last > Directories.Obj_Dir_Length then
1226          return String'(1 .. 0 => ' ');
1227       end if;
1228
1229       while Directories.Obj_Dir (Last) /= Path_Separator loop
1230          Last := Last + 1;
1231       end loop;
1232
1233       Directories.Obj_Dir_Index := Last + 1;
1234       Directories.Last_Obj_Dir_Start := First;
1235       return Directories.Obj_Dir (First .. Last - 1);
1236    end Next_Obj_Dir;
1237
1238    -------------------------
1239    -- Next_Unvisited_File --
1240    -------------------------
1241
1242    function Next_Unvisited_File return File_Reference is
1243       procedure Unchecked_Free is new Ada.Unchecked_Deallocation
1244         (Unvisited_Files_Record, Unvisited_Files_Access);
1245
1246       Ref : File_Reference;
1247       Tmp : Unvisited_Files_Access;
1248
1249    begin
1250       if Unvisited_Files = null then
1251          return Empty_File;
1252       else
1253          Tmp := Unvisited_Files;
1254          Ref := Unvisited_Files.File;
1255          Unvisited_Files := Unvisited_Files.Next;
1256          Unchecked_Free (Tmp);
1257          return Ref;
1258       end if;
1259    end Next_Unvisited_File;
1260
1261    ----------------------
1262    -- Parse_Gnatls_Src --
1263    ----------------------
1264
1265    function Parse_Gnatls_Src return String is
1266       Length : Natural;
1267
1268    begin
1269       Length := 0;
1270       for J in 1 .. Osint.Nb_Dir_In_Src_Search_Path loop
1271          if Osint.Dir_In_Src_Search_Path (J)'Length = 0 then
1272             Length := Length + 2;
1273          else
1274             Length := Length + Osint.Dir_In_Src_Search_Path (J)'Length + 1;
1275          end if;
1276       end loop;
1277
1278       declare
1279          Result : String (1 .. Length);
1280          L      : Natural;
1281
1282       begin
1283          L := Result'First;
1284          for J in 1 .. Osint.Nb_Dir_In_Src_Search_Path loop
1285             if Osint.Dir_In_Src_Search_Path (J)'Length = 0 then
1286                Result (L .. L + 1) := "." & Path_Separator;
1287                L := L + 2;
1288
1289             else
1290                Result (L .. L + Osint.Dir_In_Src_Search_Path (J)'Length - 1) :=
1291                  Osint.Dir_In_Src_Search_Path (J).all;
1292                L := L + Osint.Dir_In_Src_Search_Path (J)'Length;
1293                Result (L) := Path_Separator;
1294                L := L + 1;
1295             end if;
1296          end loop;
1297
1298          return Result;
1299       end;
1300    end Parse_Gnatls_Src;
1301
1302    ----------------------
1303    -- Parse_Gnatls_Obj --
1304    ----------------------
1305
1306    function Parse_Gnatls_Obj return String is
1307       Length : Natural;
1308
1309    begin
1310       Length := 0;
1311       for J in 1 .. Osint.Nb_Dir_In_Obj_Search_Path loop
1312          if Osint.Dir_In_Obj_Search_Path (J)'Length = 0 then
1313             Length := Length + 2;
1314          else
1315             Length := Length + Osint.Dir_In_Obj_Search_Path (J)'Length + 1;
1316          end if;
1317       end loop;
1318
1319       declare
1320          Result : String (1 .. Length);
1321          L      : Natural;
1322
1323       begin
1324          L := Result'First;
1325          for J in 1 .. Osint.Nb_Dir_In_Obj_Search_Path loop
1326             if Osint.Dir_In_Obj_Search_Path (J)'Length = 0 then
1327                Result (L .. L + 1) := "." & Path_Separator;
1328                L := L + 2;
1329             else
1330                Result (L .. L + Osint.Dir_In_Obj_Search_Path (J)'Length - 1) :=
1331                  Osint.Dir_In_Obj_Search_Path (J).all;
1332                L := L + Osint.Dir_In_Obj_Search_Path (J)'Length;
1333                Result (L) := Path_Separator;
1334                L := L + 1;
1335             end if;
1336          end loop;
1337
1338          return Result;
1339       end;
1340    end Parse_Gnatls_Obj;
1341
1342    -------------------
1343    -- Reset_Obj_Dir --
1344    -------------------
1345
1346    procedure Reset_Obj_Dir is
1347    begin
1348       Directories.Obj_Dir_Index := 1;
1349    end Reset_Obj_Dir;
1350
1351    -----------------------
1352    -- Set_Default_Match --
1353    -----------------------
1354
1355    procedure Set_Default_Match (Value : Boolean) is
1356    begin
1357       Default_Match := Value;
1358    end Set_Default_Match;
1359
1360    ----------
1361    -- Free --
1362    ----------
1363
1364    procedure Free (Str : in out Cst_String_Access) is
1365       function Convert is new Ada.Unchecked_Conversion
1366         (Cst_String_Access, GNAT.OS_Lib.String_Access);
1367
1368       S : GNAT.OS_Lib.String_Access := Convert (Str);
1369
1370    begin
1371       Free (S);
1372       Str := null;
1373    end Free;
1374
1375    ---------------------
1376    -- Reset_Directory --
1377    ---------------------
1378
1379    procedure Reset_Directory (File : File_Reference) is
1380    begin
1381       Free (File.Dir);
1382    end Reset_Directory;
1383
1384    -------------------
1385    -- Set_Unvisited --
1386    -------------------
1387
1388    procedure Set_Unvisited (File_Ref : File_Reference) is
1389       F : constant String := Get_File (File_Ref, With_Dir => False);
1390
1391    begin
1392       File_Ref.Visited := False;
1393
1394       --  ??? Do not add a source file to the list. This is true at
1395       --  least for gnatxref, and probably for gnatfind as wel
1396
1397       if F'Length > 4
1398         and then F (F'Last - 3 .. F'Last) = ".ali"
1399       then
1400          Unvisited_Files := new Unvisited_Files_Record'
1401            (File => File_Ref,
1402             Next => Unvisited_Files);
1403       end if;
1404    end Set_Unvisited;
1405
1406    ----------------------
1407    -- Get_Declarations --
1408    ----------------------
1409
1410    function Get_Declarations
1411      (Sorted : Boolean := True)
1412       return   Declaration_Array_Access
1413    is
1414       Arr   : constant Declaration_Array_Access :=
1415                 new Declaration_Array (1 .. Entities_Count);
1416       Decl  : Declaration_Reference := Entities_HTable.Get_First;
1417       Index : Natural               := Arr'First;
1418       Tmp   : Declaration_Reference;
1419
1420       procedure Move (From : Natural; To : Natural);
1421       function Lt (Op1, Op2 : Natural) return Boolean;
1422       --  See GNAT.Heap_Sort_G
1423
1424       --------
1425       -- Lt --
1426       --------
1427
1428       function Lt (Op1, Op2 : Natural) return Boolean is
1429       begin
1430          if Op1 = 0 then
1431             return Is_Less_Than (Tmp, Arr (Op2));
1432          elsif Op2 = 0 then
1433             return Is_Less_Than (Arr (Op1), Tmp);
1434          else
1435             return Is_Less_Than (Arr (Op1), Arr (Op2));
1436          end if;
1437       end Lt;
1438
1439       ----------
1440       -- Move --
1441       ----------
1442
1443       procedure Move (From : Natural; To : Natural) is
1444       begin
1445          if To = 0 then
1446             Tmp := Arr (From);
1447          elsif From = 0 then
1448             Arr (To) := Tmp;
1449          else
1450             Arr (To) := Arr (From);
1451          end if;
1452       end Move;
1453
1454       package Decl_Sort is new GNAT.Heap_Sort_G (Move, Lt);
1455
1456    --  Start of processing for Get_Declarations
1457
1458    begin
1459       while Decl /= null loop
1460          Arr (Index) := Decl;
1461          Index := Index + 1;
1462          Decl := Entities_HTable.Get_Next;
1463       end loop;
1464
1465       if Sorted and then Arr'Length /= 0 then
1466          Decl_Sort.Sort (Entities_Count);
1467       end if;
1468
1469       return Arr;
1470    end Get_Declarations;
1471
1472    ----------------------
1473    -- References_Count --
1474    ----------------------
1475
1476    function References_Count
1477      (Decl       : Declaration_Reference;
1478       Get_Reads  : Boolean := False;
1479       Get_Writes : Boolean := False;
1480       Get_Bodies : Boolean := False)
1481       return       Natural
1482    is
1483       function List_Length (E : Reference) return Natural;
1484       --  Return the number of references in E
1485
1486       -----------------
1487       -- List_Length --
1488       -----------------
1489
1490       function List_Length (E : Reference) return Natural is
1491          L  : Natural := 0;
1492          E1 : Reference := E;
1493
1494       begin
1495          while E1 /= null loop
1496             L := L + 1;
1497             E1 := E1.Next;
1498          end loop;
1499
1500          return L;
1501       end List_Length;
1502
1503       Length : Natural := 0;
1504
1505    --  Start of processing for References_Count
1506
1507    begin
1508       if Get_Reads then
1509          Length := List_Length (Decl.Ref_Ref);
1510       end if;
1511
1512       if Get_Writes then
1513          Length := Length + List_Length (Decl.Modif_Ref);
1514       end if;
1515
1516       if Get_Bodies then
1517          Length := Length + List_Length (Decl.Body_Ref);
1518       end if;
1519
1520       return Length;
1521    end References_Count;
1522
1523    ----------------------
1524    -- Store_References --
1525    ----------------------
1526
1527    procedure Store_References
1528      (Decl            : Declaration_Reference;
1529       Get_Writes      : Boolean := False;
1530       Get_Reads       : Boolean := False;
1531       Get_Bodies      : Boolean := False;
1532       Get_Declaration : Boolean := False;
1533       Arr             : in out Reference_Array;
1534       Index           : in out Natural)
1535    is
1536       procedure Add (List : Reference);
1537       --  Add all the references in List to Arr
1538
1539       ---------
1540       -- Add --
1541       ---------
1542
1543       procedure Add (List : Reference) is
1544          E : Reference := List;
1545       begin
1546          while E /= null loop
1547             Arr (Index) := E;
1548             Index := Index + 1;
1549             E := E.Next;
1550          end loop;
1551       end Add;
1552
1553    --  Start of processing for Store_References
1554
1555    begin
1556       if Get_Declaration then
1557          Add (Decl.Decl);
1558       end if;
1559
1560       if Get_Reads then
1561          Add (Decl.Ref_Ref);
1562       end if;
1563
1564       if Get_Writes then
1565          Add (Decl.Modif_Ref);
1566       end if;
1567
1568       if Get_Bodies then
1569          Add (Decl.Body_Ref);
1570       end if;
1571    end Store_References;
1572
1573    --------------------
1574    -- Get_References --
1575    --------------------
1576
1577    function Get_References
1578      (Decl : Declaration_Reference;
1579       Get_Reads  : Boolean := False;
1580       Get_Writes : Boolean := False;
1581       Get_Bodies : Boolean := False)
1582       return       Reference_Array_Access
1583    is
1584       Length : constant Natural :=
1585                  References_Count (Decl, Get_Reads, Get_Writes, Get_Bodies);
1586
1587       Arr : constant Reference_Array_Access :=
1588               new Reference_Array (1 .. Length);
1589
1590       Index : Natural := Arr'First;
1591
1592    begin
1593       Store_References
1594         (Decl            => Decl,
1595          Get_Writes      => Get_Writes,
1596          Get_Reads       => Get_Reads,
1597          Get_Bodies      => Get_Bodies,
1598          Get_Declaration => False,
1599          Arr             => Arr.all,
1600          Index           => Index);
1601
1602       if Arr'Length /= 0 then
1603          Sort (Arr.all);
1604       end if;
1605
1606       return Arr;
1607    end Get_References;
1608
1609    ----------
1610    -- Free --
1611    ----------
1612
1613    procedure Free (Arr : in out Reference_Array_Access) is
1614       procedure Internal is new Ada.Unchecked_Deallocation
1615         (Reference_Array, Reference_Array_Access);
1616    begin
1617       Internal (Arr);
1618    end Free;
1619
1620    ------------------
1621    -- Is_Parameter --
1622    ------------------
1623
1624    function Is_Parameter (Decl : Declaration_Reference) return Boolean is
1625    begin
1626       return Decl.Is_Parameter;
1627    end Is_Parameter;
1628
1629 end Xr_Tabls;