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) 1998-2008, 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.  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 COPYING3.  If not, go to --
  19 -- http://www.gnu.org/licenses for a complete copy of the license.          --
  20 --                                                                          --
  21 -- GNAT was originally developed  by the GNAT team at  New York University. --
  22 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  23 --                                                                          --
  24 ------------------------------------------------------------------------------
  25
  26 with Types;    use Types;
  27 with Osint;
  28 with Hostparm;
  29
  30 with Ada.Unchecked_Conversion;
  31 with Ada.Unchecked_Deallocation;
  32 with Ada.Strings.Fixed;
  33 with Ada.Strings;
  34 with Ada.Text_IO;
  35 with Ada.Characters.Handling;   use Ada.Characters.Handling;
  36 with Ada.Strings.Unbounded;     use Ada.Strings.Unbounded;
  37
  38 with GNAT.OS_Lib;               use GNAT.OS_Lib;
  39 with GNAT.Directory_Operations; use GNAT.Directory_Operations;
  40 with GNAT.HTable;               use GNAT.HTable;
  41 with GNAT.Heap_Sort_G;
  42
  43 package body Xr_Tabls is
  44
  45    type HTable_Headers is range 1 .. 10000;
  46
  47    procedure Set_Next (E : File_Reference; Next : File_Reference);
  48    function  Next (E : File_Reference) return File_Reference;
  49    function  Get_Key (E : File_Reference) return Cst_String_Access;
  50    function  Hash (F : Cst_String_Access) return HTable_Headers;
  51    function  Equal (F1, F2 : Cst_String_Access) return Boolean;
  52    --  The five subprograms above are used to instantiate the static
  53    --  htable to store the files that should be processed.
  54
  55    package File_HTable is new GNAT.HTable.Static_HTable
  56      (Header_Num => HTable_Headers,
  57       Element    => File_Record,
  58       Elmt_Ptr   => File_Reference,
  59       Null_Ptr   => null,
  60       Set_Next   => Set_Next,
  61       Next       => Next,
  62       Key        => Cst_String_Access,
  63       Get_Key    => Get_Key,
  64       Hash       => Hash,
  65       Equal      => Equal);
  66    --  A hash table to store all the files referenced in the
  67    --  application.  The keys in this htable are the name of the files
  68    --  themselves, therefore it is assumed that the source path
  69    --  doesn't contain twice the same source or ALI file name
  70
  71    type Unvisited_Files_Record;
  72    type Unvisited_Files_Access is access Unvisited_Files_Record;
  73    type Unvisited_Files_Record is record
  74       File : File_Reference;
  75       Next : Unvisited_Files_Access;
  76    end record;
  77    --  A special list, in addition to File_HTable, that only stores
  78    --  the files that haven't been visited so far. Note that the File
  79    --  list points to some data in File_HTable, and thus should never be freed.
  80
  81    function Next (E : Declaration_Reference) return Declaration_Reference;
  82    procedure Set_Next (E, Next : Declaration_Reference);
  83    function  Get_Key (E : Declaration_Reference) return Cst_String_Access;
  84    --  The subprograms above are used to instantiate the static
  85    --  htable to store the entities that have been found in the application
  86
  87    package Entities_HTable is new GNAT.HTable.Static_HTable
  88      (Header_Num => HTable_Headers,
  89       Element    => Declaration_Record,
  90       Elmt_Ptr   => Declaration_Reference,
  91       Null_Ptr   => null,
  92       Set_Next   => Set_Next,
  93       Next       => Next,
  94       Key        => Cst_String_Access,
  95       Get_Key    => Get_Key,
  96       Hash       => Hash,
  97       Equal      => Equal);
  98    --  A hash table to store all the entities defined in the
  99    --  application. For each entity, we store a list of its reference
 100    --  locations as well.
 101    --  The keys in this htable should be created with Key_From_Ref,
 102    --  and are the file, line and column of the declaration, which are
 103    --  unique for every entity.
 104
 105    Entities_Count : Natural := 0;
 106    --  Number of entities in Entities_HTable. This is used in the end
 107    --  when sorting the table.
 108
 109    Longest_File_Name_In_Table : Natural := 0;
 110    Unvisited_Files            : Unvisited_Files_Access := null;
 111    Directories                : Project_File_Ptr;
 112    Default_Match              : Boolean := False;
 113    --  The above need commenting ???
 114
 115    function Parse_Gnatls_Src return String;
 116    --  Return the standard source directories (taking into account the
 117    --  ADA_INCLUDE_PATH environment variable, if Osint.Add_Default_Search_Dirs
 118    --  was called first).
 119
 120    function Parse_Gnatls_Obj return String;
 121    --  Return the standard object directories (taking into account the
 122    --  ADA_OBJECTS_PATH environment variable).
 123
 124    function Key_From_Ref
 125      (File_Ref  : File_Reference;
 126       Line      : Natural;
 127       Column    : Natural)
 128       return      String;
 129    --  Return a key for the symbol declared at File_Ref, Line,
 130    --  Column. This key should be used for lookup in Entity_HTable
 131
 132    function Is_Less_Than (Decl1, Decl2 : Declaration_Reference) return Boolean;
 133    --  Compare two declarations (the comparison is case-insensitive)
 134
 135    function Is_Less_Than (Ref1, Ref2 : Reference) return Boolean;
 136    --  Compare two references
 137
 138    procedure Store_References
 139      (Decl            : Declaration_Reference;
 140       Get_Writes      : Boolean := False;
 141       Get_Reads       : Boolean := False;
 142       Get_Bodies      : Boolean := False;
 143       Get_Declaration : Boolean := False;
 144       Arr             : in out Reference_Array;
 145       Index           : in out Natural);
 146    --  Store in Arr, starting at Index, all the references to Decl. The Get_*
 147    --  parameters can be used to indicate which references should be stored.
 148    --  Constraint_Error will be raised if Arr is not big enough.
 149
 150    procedure Sort (Arr : in out Reference_Array);
 151    --  Sort an array of references (Arr'First must be 1)
 152
 153    --------------
 154    -- Set_Next --
 155    --------------
 156
 157    procedure Set_Next (E : File_Reference; Next : File_Reference) is
 158    begin
 159       E.Next := Next;
 160    end Set_Next;
 161
 162    procedure Set_Next
 163      (E : Declaration_Reference; Next : Declaration_Reference) is
 164    begin
 165       E.Next := Next;
 166    end Set_Next;
 167
 168    -------------
 169    -- Get_Key --
 170    -------------
 171
 172    function Get_Key (E : File_Reference) return Cst_String_Access is
 173    begin
 174       return E.File;
 175    end Get_Key;
 176
 177    function Get_Key (E : Declaration_Reference) return Cst_String_Access is
 178    begin
 179       return E.Key;
 180    end Get_Key;
 181
 182    ----------
 183    -- Hash --
 184    ----------
 185
 186    function Hash (F : Cst_String_Access) return HTable_Headers is
 187       function H is new GNAT.HTable.Hash (HTable_Headers);
 188
 189    begin
 190       return H (F.all);
 191    end Hash;
 192
 193    -----------
 194    -- Equal --
 195    -----------
 196
 197    function Equal (F1, F2 : Cst_String_Access) return Boolean is
 198    begin
 199       return F1.all = F2.all;
 200    end Equal;
 201
 202    ------------------
 203    -- Key_From_Ref --
 204    ------------------
 205
 206    function Key_From_Ref
 207      (File_Ref : File_Reference;
 208       Line     : Natural;
 209       Column   : Natural)
 210       return     String
 211    is
 212    begin
 213       return File_Ref.File.all & Natural'Image (Line) & Natural'Image (Column);
 214    end Key_From_Ref;
 215
 216    ---------------------
 217    -- Add_Declaration --
 218    ---------------------
 219
 220    function Add_Declaration
 221      (File_Ref     : File_Reference;
 222       Symbol       : String;
 223       Line         : Natural;
 224       Column       : Natural;
 225       Decl_Type    : Character;
 226       Remove_Only  : Boolean := False;
 227       Symbol_Match : Boolean := True)
 228       return         Declaration_Reference
 229    is
 230       procedure Unchecked_Free is new Ada.Unchecked_Deallocation
 231         (Declaration_Record, Declaration_Reference);
 232
 233       Key : aliased constant String := Key_From_Ref (File_Ref, Line, Column);
 234
 235       New_Decl : Declaration_Reference :=
 236                    Entities_HTable.Get (Key'Unchecked_Access);
 237
 238       Is_Parameter : Boolean := False;
 239
 240    begin
 241       --  Insert the Declaration in the table. There might already be a
 242       --  declaration in the table if the entity is a parameter, so we
 243       --  need to check that first.
 244
 245       if New_Decl /= null and then New_Decl.Symbol_Length = 0 then
 246          Is_Parameter := New_Decl.Is_Parameter;
 247          Entities_HTable.Remove (Key'Unrestricted_Access);
 248          Entities_Count := Entities_Count - 1;
 249          Free (New_Decl.Key);
 250          Unchecked_Free (New_Decl);
 251          New_Decl := null;
 252       end if;
 253
 254       --  The declaration might also already be there for parent types. In
 255       --  this case, we should keep the entry, since some other entries are
 256       --  pointing to it.
 257
 258       if New_Decl = null
 259         and then not Remove_Only
 260       then
 261          New_Decl :=
 262            new Declaration_Record'
 263              (Symbol_Length => Symbol'Length,
 264               Symbol        => Symbol,
 265               Key           => new String'(Key),
 266               Decl          => new Reference_Record'
 267                                      (File          => File_Ref,
 268                                       Line          => Line,
 269                                       Column        => Column,
 270                                       Source_Line   => null,
 271                                       Next          => null),
 272               Is_Parameter  => Is_Parameter,
 273               Decl_Type     => Decl_Type,
 274               Body_Ref      => null,
 275               Ref_Ref       => null,
 276               Modif_Ref     => null,
 277               Match         => Symbol_Match
 278                                  and then
 279                                    (Default_Match
 280                                      or else Match (File_Ref, Line, Column)),
 281               Par_Symbol    => null,
 282               Next          => null);
 283
 284          Entities_HTable.Set (New_Decl);
 285          Entities_Count := Entities_Count + 1;
 286
 287          if New_Decl.Match then
 288             Longest_File_Name_In_Table :=
 289               Natural'Max (File_Ref.File'Length, Longest_File_Name_In_Table);
 290          end if;
 291
 292       elsif New_Decl /= null
 293         and then not New_Decl.Match
 294       then
 295          New_Decl.Match := Default_Match
 296            or else Match (File_Ref, Line, Column);
 297       end if;
 298
 299       return New_Decl;
 300    end Add_Declaration;
 301
 302    ----------------------
 303    -- Add_To_Xref_File --
 304    ----------------------
 305
 306    function Add_To_Xref_File
 307      (File_Name       : String;
 308       Visited         : Boolean := True;
 309       Emit_Warning    : Boolean := False;
 310       Gnatchop_File   : String  := "";
 311       Gnatchop_Offset : Integer := 0) return File_Reference
 312    is
 313       Base    : aliased constant String := Base_Name (File_Name);
 314       Dir     : constant String := Dir_Name (File_Name);
 315       Dir_Acc : GNAT.OS_Lib.String_Access   := null;
 316       Ref     : File_Reference;
 317
 318    begin
 319       --  Do we have a directory name as well?
 320
 321       if File_Name /= Base then
 322          Dir_Acc := new String'(Dir);
 323       end if;
 324
 325       Ref := File_HTable.Get (Base'Unchecked_Access);
 326       if Ref = null then
 327          Ref := new File_Record'
 328            (File            => new String'(Base),
 329             Dir             => Dir_Acc,
 330             Lines           => null,
 331             Visited         => Visited,
 332             Emit_Warning    => Emit_Warning,
 333             Gnatchop_File   => new String'(Gnatchop_File),
 334             Gnatchop_Offset => Gnatchop_Offset,
 335             Next            => null);
 336          File_HTable.Set (Ref);
 337
 338          if not Visited then
 339
 340             --  Keep a separate list for faster access
 341
 342             Set_Unvisited (Ref);
 343          end if;
 344       end if;
 345       return Ref;
 346    end Add_To_Xref_File;
 347
 348    --------------
 349    -- Add_Line --
 350    --------------
 351
 352    procedure Add_Line
 353      (File   : File_Reference;
 354       Line   : Natural;
 355       Column : Natural)
 356    is
 357    begin
 358       File.Lines := new Ref_In_File'(Line   => Line,
 359                                      Column => Column,
 360                                      Next   => File.Lines);
 361    end Add_Line;
 362
 363    ----------------
 364    -- Add_Parent --
 365    ----------------
 366
 367    procedure Add_Parent
 368      (Declaration : in out Declaration_Reference;
 369       Symbol      : String;
 370       Line        : Natural;
 371       Column      : Natural;
 372       File_Ref    : File_Reference)
 373    is
 374    begin
 375       Declaration.Par_Symbol :=
 376         Add_Declaration
 377           (File_Ref, Symbol, Line, Column,
 378            Decl_Type    => ' ',
 379            Symbol_Match => False);
 380    end Add_Parent;
 381
 382    -------------------
 383    -- Add_Reference --
 384    -------------------
 385
 386    procedure Add_Reference
 387      (Declaration   : Declaration_Reference;
 388       File_Ref      : File_Reference;
 389       Line          : Natural;
 390       Column        : Natural;
 391       Ref_Type      : Character;
 392       Labels_As_Ref : Boolean)
 393    is
 394       New_Ref : Reference;
 395
 396    begin
 397       case Ref_Type is
 398          when 'b' | 'c' | 'm' | 'r' | 'R' | 'i' | ' ' | 'x' =>
 399             null;
 400
 401          when 'l' | 'w' =>
 402             if not Labels_As_Ref then
 403                return;
 404             end if;
 405
 406          when '=' | '<' | '>' | '^' =>
 407
 408             --  Create a dummy declaration in the table to report it as a
 409             --  parameter. Note that the current declaration for the subprogram
 410             --  comes before the declaration of the parameter.
 411
 412             declare
 413                Key      : constant String :=
 414                             Key_From_Ref (File_Ref, Line, Column);
 415                New_Decl : Declaration_Reference;
 416
 417             begin
 418                New_Decl := new Declaration_Record'
 419                  (Symbol_Length => 0,
 420                   Symbol        => "",
 421                   Key           => new String'(Key),
 422                   Decl          => null,
 423                   Is_Parameter  => True,
 424                   Decl_Type     => ' ',
 425                   Body_Ref      => null,
 426                   Ref_Ref       => null,
 427                   Modif_Ref     => null,
 428                   Match         => False,
 429                   Par_Symbol    => null,
 430                   Next          => null);
 431                Entities_HTable.Set (New_Decl);
 432                Entities_Count := Entities_Count + 1;
 433             end;
 434
 435          when 'e' | 'z' | 't' | 'p' | 'P' | 'k' | 'd' =>
 436             return;
 437
 438          when others    =>
 439             Ada.Text_IO.Put_Line ("Unknown reference type: " & Ref_Type);
 440             return;
 441       end case;
 442
 443       New_Ref := new Reference_Record'
 444         (File        => File_Ref,
 445          Line        => Line,
 446          Column      => Column,
 447          Source_Line => null,
 448          Next        => null);
 449
 450       --  We can insert the reference in the list directly, since all
 451       --  the references will appear only once in the ALI file
 452       --  corresponding to the file where they are referenced.
 453       --  This saves a lot of time compared to checking the list to check
 454       --  if it exists.
 455
 456       case Ref_Type is
 457          when 'b' | 'c' =>
 458             New_Ref.Next          := Declaration.Body_Ref;
 459             Declaration.Body_Ref  := New_Ref;
 460
 461          when 'r' | 'R' | 'i' | 'l' | ' ' | 'x' | 'w' =>
 462             New_Ref.Next          := Declaration.Ref_Ref;
 463             Declaration.Ref_Ref   := New_Ref;
 464
 465          when 'm' =>
 466             New_Ref.Next          := Declaration.Modif_Ref;
 467             Declaration.Modif_Ref := New_Ref;
 468
 469          when others =>
 470             null;
 471       end case;
 472
 473       if not Declaration.Match then
 474          Declaration.Match := Match (File_Ref, Line, Column);
 475       end if;
 476
 477       if Declaration.Match then
 478          Longest_File_Name_In_Table :=
 479            Natural'Max (File_Ref.File'Length, Longest_File_Name_In_Table);
 480       end if;
 481    end Add_Reference;
 482
 483    -------------------
 484    -- ALI_File_Name --
 485    -------------------
 486
 487    function ALI_File_Name (Ada_File_Name : String) return String is
 488
 489       --  ??? Should ideally be based on the naming scheme defined in
 490       --  project files.
 491
 492       Index : constant Natural :=
 493                 Ada.Strings.Fixed.Index
 494                   (Ada_File_Name, ".", Going => Ada.Strings.Backward);
 495
 496    begin
 497       if Index /= 0 then
 498          return Ada_File_Name (Ada_File_Name'First .. Index) & "ali";
 499       else
 500          return Ada_File_Name & ".ali";
 501       end if;
 502    end ALI_File_Name;
 503
 504    ------------------
 505    -- Is_Less_Than --
 506    ------------------
 507
 508    function Is_Less_Than (Ref1, Ref2 : Reference) return Boolean is
 509    begin
 510       if Ref1 = null then
 511          return False;
 512       elsif Ref2 = null then
 513          return True;
 514       end if;
 515
 516       if Ref1.File.File.all < Ref2.File.File.all then
 517          return True;
 518
 519       elsif Ref1.File.File.all = Ref2.File.File.all then
 520          return (Ref1.Line < Ref2.Line
 521                  or else (Ref1.Line = Ref2.Line
 522                           and then Ref1.Column < Ref2.Column));
 523       end if;
 524
 525       return False;
 526    end Is_Less_Than;
 527
 528    ------------------
 529    -- Is_Less_Than --
 530    ------------------
 531
 532    function Is_Less_Than (Decl1, Decl2 : Declaration_Reference) return Boolean
 533    is
 534       --  We cannot store the data case-insensitive in the table,
 535       --  since we wouldn't be able to find the right casing for the
 536       --  display later on.
 537
 538       S1 : constant String := To_Lower (Decl1.Symbol);
 539       S2 : constant String := To_Lower (Decl2.Symbol);
 540
 541    begin
 542       if S1 < S2 then
 543          return True;
 544       elsif S1 > S2 then
 545          return False;
 546       end if;
 547
 548       return Decl1.Key.all < Decl2.Key.all;
 549    end Is_Less_Than;
 550
 551    -------------------------
 552    -- Create_Project_File --
 553    -------------------------
 554
 555    procedure Create_Project_File (Name : String) is
 556       Obj_Dir     : Unbounded_String := Null_Unbounded_String;
 557       Src_Dir     : Unbounded_String := Null_Unbounded_String;
 558       Build_Dir   : GNAT.OS_Lib.String_Access := new String'("");
 559
 560       F           : File_Descriptor;
 561       Len         : Positive;
 562       File_Name   : aliased String := Name & ASCII.NUL;
 563
 564    begin
 565       --  Read the size of the file
 566
 567       F := Open_Read (File_Name'Address, Text);
 568
 569       --  Project file not found
 570
 571       if F /= Invalid_FD then
 572          Len := Positive (File_Length (F));
 573
 574          declare
 575             Buffer : String (1 .. Len);
 576             Index  : Positive := Buffer'First;
 577             Last   : Positive;
 578
 579          begin
 580             Len := Read (F, Buffer'Address, Len);
 581             Close (F);
 582
 583             --  First, look for Build_Dir, since all the source and object
 584             --  path are relative to it.
 585
 586             while Index <= Buffer'Last loop
 587
 588                --  Find the end of line
 589
 590                Last := Index;
 591                while Last <= Buffer'Last
 592                  and then Buffer (Last) /= ASCII.LF
 593                  and then Buffer (Last) /= ASCII.CR
 594                loop
 595                   Last := Last + 1;
 596                end loop;
 597
 598                if Index <= Buffer'Last - 9
 599                  and then Buffer (Index .. Index + 9) = "build_dir="
 600                then
 601                   Index := Index + 10;
 602                   while Index <= Last
 603                     and then (Buffer (Index) = ' '
 604                               or else Buffer (Index) = ASCII.HT)
 605                   loop
 606                      Index := Index + 1;
 607                   end loop;
 608
 609                   Free (Build_Dir);
 610                   Build_Dir := new String'(Buffer (Index .. Last - 1));
 611                end if;
 612
 613                Index := Last + 1;
 614
 615                --  In case we had a ASCII.CR/ASCII.LF end of line, skip the
 616                --  remaining symbol
 617
 618                if Index <= Buffer'Last
 619                  and then Buffer (Index) = ASCII.LF
 620                then
 621                   Index := Index + 1;
 622                end if;
 623             end loop;
 624
 625             --  Now parse the source and object paths
 626
 627             Index := Buffer'First;
 628             while Index <= Buffer'Last loop
 629
 630                --  Find the end of line
 631
 632                Last := Index;
 633                while Last <= Buffer'Last
 634                  and then Buffer (Last) /= ASCII.LF
 635                  and then Buffer (Last) /= ASCII.CR
 636                loop
 637                   Last := Last + 1;
 638                end loop;
 639
 640                if Index <= Buffer'Last - 7
 641                  and then Buffer (Index .. Index + 7) = "src_dir="
 642                then
 643                   Append (Src_Dir, Normalize_Pathname
 644                           (Name      => Ada.Strings.Fixed.Trim
 645                            (Buffer (Index + 8 .. Last - 1), Ada.Strings.Both),
 646                            Directory => Build_Dir.all) & Path_Separator);
 647
 648                elsif Index <= Buffer'Last - 7
 649                  and then Buffer (Index .. Index + 7) = "obj_dir="
 650                then
 651                   Append (Obj_Dir, Normalize_Pathname
 652                           (Name      => Ada.Strings.Fixed.Trim
 653                            (Buffer (Index + 8 .. Last - 1), Ada.Strings.Both),
 654                            Directory => Build_Dir.all) & Path_Separator);
 655                end if;
 656
 657                --  In case we had a ASCII.CR/ASCII.LF end of line, skip the
 658                --  remaining symbol
 659                Index := Last + 1;
 660
 661                if Index <= Buffer'Last
 662                  and then Buffer (Index) = ASCII.LF
 663                then
 664                   Index := Index + 1;
 665                end if;
 666             end loop;
 667          end;
 668       end if;
 669
 670       Osint.Add_Default_Search_Dirs;
 671
 672       declare
 673          Src : constant String := Parse_Gnatls_Src;
 674          Obj : constant String := Parse_Gnatls_Obj;
 675
 676       begin
 677          Directories := new Project_File'
 678            (Src_Dir_Length     => Length (Src_Dir) + Src'Length,
 679             Obj_Dir_Length     => Length (Obj_Dir) + Obj'Length,
 680             Src_Dir            => To_String (Src_Dir) & Src,
 681             Obj_Dir            => To_String (Obj_Dir) & Obj,
 682             Src_Dir_Index      => 1,
 683             Obj_Dir_Index      => 1,
 684             Last_Obj_Dir_Start => 0);
 685       end;
 686
 687       Free (Build_Dir);
 688    end Create_Project_File;
 689
 690    ---------------------
 691    -- Current_Obj_Dir --
 692    ---------------------
 693
 694    function Current_Obj_Dir return String is
 695    begin
 696       return Directories.Obj_Dir
 697         (Directories.Last_Obj_Dir_Start .. Directories.Obj_Dir_Index - 2);
 698    end Current_Obj_Dir;
 699
 700    ----------------
 701    -- Get_Column --
 702    ----------------
 703
 704    function Get_Column (Decl : Declaration_Reference) return String is
 705    begin
 706       return Ada.Strings.Fixed.Trim (Natural'Image (Decl.Decl.Column),
 707                                      Ada.Strings.Left);
 708    end Get_Column;
 709
 710    function Get_Column (Ref : Reference) return String is
 711    begin
 712       return Ada.Strings.Fixed.Trim (Natural'Image (Ref.Column),
 713                                      Ada.Strings.Left);
 714    end Get_Column;
 715
 716    ---------------------
 717    -- Get_Declaration --
 718    ---------------------
 719
 720    function Get_Declaration
 721      (File_Ref : File_Reference;
 722       Line     : Natural;
 723       Column   : Natural)
 724       return     Declaration_Reference
 725    is
 726       Key : aliased constant String := Key_From_Ref (File_Ref, Line, Column);
 727
 728    begin
 729       return Entities_HTable.Get (Key'Unchecked_Access);
 730    end Get_Declaration;
 731
 732    ----------------------
 733    -- Get_Emit_Warning --
 734    ----------------------
 735
 736    function Get_Emit_Warning (File : File_Reference) return Boolean is
 737    begin
 738       return File.Emit_Warning;
 739    end Get_Emit_Warning;
 740
 741    --------------
 742    -- Get_File --
 743    --------------
 744
 745    function Get_File
 746      (Decl     : Declaration_Reference;
 747       With_Dir : Boolean := False) return String
 748    is
 749    begin
 750       return Get_File (Decl.Decl.File, With_Dir);
 751    end Get_File;
 752
 753    function Get_File
 754      (Ref      : Reference;
 755       With_Dir : Boolean := False) return String
 756    is
 757    begin
 758       return Get_File (Ref.File, With_Dir);
 759    end Get_File;
 760
 761    function Get_File
 762      (File     : File_Reference;
 763       With_Dir : Boolean := False;
 764       Strip    : Natural    := 0) return String
 765    is
 766       Tmp : GNAT.OS_Lib.String_Access;
 767
 768       function Internal_Strip (Full_Name : String) return String;
 769       --  Internal function to process the Strip parameter
 770
 771       --------------------
 772       -- Internal_Strip --
 773       --------------------
 774
 775       function Internal_Strip (Full_Name : String) return String is
 776          Unit_End        : Natural;
 777          Extension_Start : Natural;
 778          S               : Natural;
 779
 780       begin
 781          if Strip = 0 then
 782             return Full_Name;
 783          end if;
 784
 785          --  Isolate the file extension
 786
 787          Extension_Start := Full_Name'Last;
 788          while Extension_Start >= Full_Name'First
 789            and then Full_Name (Extension_Start) /= '.'
 790          loop
 791             Extension_Start := Extension_Start - 1;
 792          end loop;
 793
 794          --  Strip the right number of subunit_names
 795
 796          S := Strip;
 797          Unit_End := Extension_Start - 1;
 798          while Unit_End >= Full_Name'First
 799            and then S > 0
 800          loop
 801             if Full_Name (Unit_End) = '-' then
 802                S := S - 1;
 803             end if;
 804
 805             Unit_End := Unit_End - 1;
 806          end loop;
 807
 808          if Unit_End < Full_Name'First then
 809             return "";
 810          else
 811             return Full_Name (Full_Name'First .. Unit_End)
 812               & Full_Name (Extension_Start .. Full_Name'Last);
 813          end if;
 814       end Internal_Strip;
 815
 816    --  Start of processing for Get_File;
 817
 818    begin
 819       --  If we do not want the full path name
 820
 821       if not With_Dir then
 822          return Internal_Strip (File.File.all);
 823       end if;
 824
 825       if File.Dir = null then
 826          if Ada.Strings.Fixed.Tail (File.File.all, 3) = "ali" then
 827             Tmp := Locate_Regular_File
 828               (Internal_Strip (File.File.all), Directories.Obj_Dir);
 829          else
 830             Tmp := Locate_Regular_File
 831               (File.File.all, Directories.Src_Dir);
 832          end if;
 833
 834          if Tmp = null then
 835             File.Dir := new String'("");
 836          else
 837             File.Dir := new String'(Dir_Name (Tmp.all));
 838             Free (Tmp);
 839          end if;
 840       end if;
 841
 842       return Internal_Strip (File.Dir.all & File.File.all);
 843    end Get_File;
 844
 845    ------------------
 846    -- Get_File_Ref --
 847    ------------------
 848
 849    function Get_File_Ref (Ref : Reference) return File_Reference is
 850    begin
 851       return Ref.File;
 852    end Get_File_Ref;
 853
 854    -----------------------
 855    -- Get_Gnatchop_File --
 856    -----------------------
 857
 858    function Get_Gnatchop_File
 859      (File     : File_Reference;
 860       With_Dir : Boolean := False)
 861       return     String
 862    is
 863    begin
 864       if File.Gnatchop_File.all = "" then
 865          return Get_File (File, With_Dir);
 866       else
 867          return File.Gnatchop_File.all;
 868       end if;
 869    end Get_Gnatchop_File;
 870
 871    function Get_Gnatchop_File
 872      (Ref      : Reference;
 873       With_Dir : Boolean := False)
 874       return     String
 875    is
 876    begin
 877       return Get_Gnatchop_File (Ref.File, With_Dir);
 878    end Get_Gnatchop_File;
 879
 880    function Get_Gnatchop_File
 881      (Decl     : Declaration_Reference;
 882       With_Dir : Boolean := False)
 883       return     String
 884    is
 885    begin
 886       return Get_Gnatchop_File (Decl.Decl.File, With_Dir);
 887    end Get_Gnatchop_File;
 888
 889    --------------
 890    -- Get_Line --
 891    --------------
 892
 893    function Get_Line (Decl : Declaration_Reference) return String is
 894    begin
 895       return Ada.Strings.Fixed.Trim (Natural'Image (Decl.Decl.Line),
 896                                      Ada.Strings.Left);
 897    end Get_Line;
 898
 899    function Get_Line (Ref : Reference) return String is
 900    begin
 901       return Ada.Strings.Fixed.Trim (Natural'Image (Ref.Line),
 902                                      Ada.Strings.Left);
 903    end Get_Line;
 904
 905    ----------------
 906    -- Get_Parent --
 907    ----------------
 908
 909    function Get_Parent
 910      (Decl : Declaration_Reference)
 911       return Declaration_Reference
 912    is
 913    begin
 914       return Decl.Par_Symbol;
 915    end Get_Parent;
 916
 917    ---------------------
 918    -- Get_Source_Line --
 919    ---------------------
 920
 921    function Get_Source_Line (Ref : Reference) return String is
 922    begin
 923       if Ref.Source_Line /= null then
 924          return Ref.Source_Line.all;
 925       else
 926          return "";
 927       end if;
 928    end Get_Source_Line;
 929
 930    function Get_Source_Line (Decl : Declaration_Reference) return String is
 931    begin
 932       if Decl.Decl.Source_Line /= null then
 933          return Decl.Decl.Source_Line.all;
 934       else
 935          return "";
 936       end if;
 937    end Get_Source_Line;
 938
 939    ----------------
 940    -- Get_Symbol --
 941    ----------------
 942
 943    function Get_Symbol (Decl : Declaration_Reference) return String is
 944    begin
 945       return Decl.Symbol;
 946    end Get_Symbol;
 947
 948    --------------
 949    -- Get_Type --
 950    --------------
 951
 952    function Get_Type (Decl : Declaration_Reference) return Character is
 953    begin
 954       return Decl.Decl_Type;
 955    end Get_Type;
 956
 957    ----------
 958    -- Sort --
 959    ----------
 960
 961    procedure Sort (Arr : in out Reference_Array) is
 962       Tmp : Reference;
 963
 964       function Lt (Op1, Op2 : Natural) return Boolean;
 965       procedure Move (From, To : Natural);
 966       --  See GNAT.Heap_Sort_G
 967
 968       --------
 969       -- Lt --
 970       --------
 971
 972       function Lt (Op1, Op2 : Natural) return Boolean is
 973       begin
 974          if Op1 = 0 then
 975             return Is_Less_Than (Tmp, Arr (Op2));
 976          elsif Op2 = 0 then
 977             return Is_Less_Than (Arr (Op1), Tmp);
 978          else
 979             return Is_Less_Than (Arr (Op1), Arr (Op2));
 980          end if;
 981       end Lt;
 982
 983       ----------
 984       -- Move --
 985       ----------
 986
 987       procedure Move (From, To : Natural) is
 988       begin
 989          if To = 0 then
 990             Tmp := Arr (From);
 991          elsif From = 0 then
 992             Arr (To) := Tmp;
 993          else
 994             Arr (To) := Arr (From);
 995          end if;
 996       end Move;
 997
 998       package Ref_Sort is new GNAT.Heap_Sort_G (Move, Lt);
 999
1000    --  Start of processing for Sort
1001
1002    begin
1003       Ref_Sort.Sort (Arr'Last);
1004    end Sort;
1005
1006    -----------------------
1007    -- Grep_Source_Files --
1008    -----------------------
1009
1010    procedure Grep_Source_Files is
1011       Length       : Natural := 0;
1012       Decl         : Declaration_Reference := Entities_HTable.Get_First;
1013       Arr          : Reference_Array_Access;
1014       Index        : Natural;
1015       End_Index    : Natural;
1016       Current_File : File_Reference;
1017       Current_Line : Cst_String_Access;
1018       Buffer       : GNAT.OS_Lib.String_Access;
1019       Ref          : Reference;
1020       Line         : Natural;
1021
1022    begin
1023       --  Create a temporary array, where all references will be
1024       --  sorted by files. This way, we only have to read the source
1025       --  files once.
1026
1027       while Decl /= null loop
1028
1029          --  Add 1 for the declaration itself
1030
1031          Length := Length + References_Count (Decl, True, True, True) + 1;
1032          Decl := Entities_HTable.Get_Next;
1033       end loop;
1034
1035       Arr := new Reference_Array (1 .. Length);
1036       Index := Arr'First;
1037
1038       Decl := Entities_HTable.Get_First;
1039       while Decl /= null loop
1040          Store_References (Decl, True, True, True, True, Arr.all, Index);
1041          Decl := Entities_HTable.Get_Next;
1042       end loop;
1043
1044       Sort (Arr.all);
1045
1046       --  Now traverse the whole array and find the appropriate source
1047       --  lines.
1048
1049       for R in Arr'Range loop
1050          Ref := Arr (R);
1051
1052          if Ref.File /= Current_File then
1053             Free (Buffer);
1054             begin
1055                Read_File (Get_File (Ref.File, With_Dir => True), Buffer);
1056                End_Index := Buffer'First - 1;
1057                Line := 0;
1058             exception
1059                when Ada.Text_IO.Name_Error | Ada.Text_IO.End_Error =>
1060                   Line := Natural'Last;
1061             end;
1062             Current_File := Ref.File;
1063          end if;
1064
1065          if Ref.Line > Line then
1066
1067             --  Do not free Current_Line, it is referenced by the last
1068             --  Ref we processed.
1069
1070             loop
1071                Index := End_Index + 1;
1072
1073                loop
1074                   End_Index := End_Index + 1;
1075                   exit when End_Index > Buffer'Last
1076                     or else Buffer (End_Index) = ASCII.LF;
1077                end loop;
1078
1079                --  Skip spaces at beginning of line
1080
1081                while Index < End_Index and then
1082                  (Buffer (Index) = ' ' or else Buffer (Index) = ASCII.HT)
1083                loop
1084                   Index := Index + 1;
1085                end loop;
1086
1087                Line := Line + 1;
1088                exit when Ref.Line = Line;
1089             end loop;
1090
1091             Current_Line := new String'(Buffer (Index .. End_Index - 1));
1092          end if;
1093
1094          Ref.Source_Line := Current_Line;
1095       end loop;
1096
1097       Free (Buffer);
1098       Free (Arr);
1099    end Grep_Source_Files;
1100
1101    ---------------
1102    -- Read_File --
1103    ---------------
1104
1105    procedure Read_File
1106      (File_Name : String;
1107       Contents  : out GNAT.OS_Lib.String_Access)
1108    is
1109       Name_0 : constant String := File_Name & ASCII.NUL;
1110       FD     : constant File_Descriptor := Open_Read (Name_0'Address, Binary);
1111       Length : Natural;
1112
1113    begin
1114       if FD = Invalid_FD then
1115          raise Ada.Text_IO.Name_Error;
1116       end if;
1117
1118       --  Include room for EOF char
1119
1120       Length := Natural (File_Length (FD));
1121
1122       declare
1123          Buffer    : String (1 .. Length + 1);
1124          This_Read : Integer;
1125          Read_Ptr  : Natural := 1;
1126
1127       begin
1128          loop
1129             This_Read := Read (FD,
1130                                A => Buffer (Read_Ptr)'Address,
1131                                N => Length + 1 - Read_Ptr);
1132             Read_Ptr := Read_Ptr + Integer'Max (This_Read, 0);
1133             exit when This_Read <= 0;
1134          end loop;
1135
1136          Buffer (Read_Ptr) := EOF;
1137          Contents := new String'(Buffer (1 .. Read_Ptr));
1138
1139          --  Things are not simple on VMS due to the plethora of file types
1140          --  and organizations. It seems clear that there shouldn't be more
1141          --  bytes read than are contained in the file though.
1142
1143          if (Hostparm.OpenVMS and then Read_Ptr > Length + 1)
1144            or else (not Hostparm.OpenVMS and then Read_Ptr /= Length + 1)
1145          then
1146             raise Ada.Text_IO.End_Error;
1147          end if;
1148
1149          Close (FD);
1150       end;
1151    end Read_File;
1152
1153    -----------------------
1154    -- Longest_File_Name --
1155    -----------------------
1156
1157    function Longest_File_Name return Natural is
1158    begin
1159       return Longest_File_Name_In_Table;
1160    end Longest_File_Name;
1161
1162    -----------
1163    -- Match --
1164    -----------
1165
1166    function Match
1167      (File   : File_Reference;
1168       Line   : Natural;
1169       Column : Natural)
1170       return   Boolean
1171    is
1172       Ref : Ref_In_File_Ptr := File.Lines;
1173
1174    begin
1175       while Ref /= null loop
1176          if (Ref.Line = 0 or else Ref.Line = Line)
1177            and then (Ref.Column = 0 or else Ref.Column = Column)
1178          then
1179             return True;
1180          end if;
1181
1182          Ref := Ref.Next;
1183       end loop;
1184
1185       return False;
1186    end Match;
1187
1188    -----------
1189    -- Match --
1190    -----------
1191
1192    function Match (Decl : Declaration_Reference) return Boolean is
1193    begin
1194       return Decl.Match;
1195    end Match;
1196
1197    ----------
1198    -- Next --
1199    ----------
1200
1201    function Next (E : File_Reference) return File_Reference is
1202    begin
1203       return E.Next;
1204    end Next;
1205
1206    function Next (E : Declaration_Reference) return Declaration_Reference is
1207    begin
1208       return E.Next;
1209    end Next;
1210
1211    ------------------
1212    -- Next_Obj_Dir --
1213    ------------------
1214
1215    function Next_Obj_Dir return String is
1216       First : constant Integer := Directories.Obj_Dir_Index;
1217       Last  : Integer;
1218
1219    begin
1220       Last := Directories.Obj_Dir_Index;
1221
1222       if Last > Directories.Obj_Dir_Length then
1223          return String'(1 .. 0 => ' ');
1224       end if;
1225
1226       while Directories.Obj_Dir (Last) /= Path_Separator loop
1227          Last := Last + 1;
1228       end loop;
1229
1230       Directories.Obj_Dir_Index := Last + 1;
1231       Directories.Last_Obj_Dir_Start := First;
1232       return Directories.Obj_Dir (First .. Last - 1);
1233    end Next_Obj_Dir;
1234
1235    -------------------------
1236    -- Next_Unvisited_File --
1237    -------------------------
1238
1239    function Next_Unvisited_File return File_Reference is
1240       procedure Unchecked_Free is new Ada.Unchecked_Deallocation
1241         (Unvisited_Files_Record, Unvisited_Files_Access);
1242
1243       Ref : File_Reference;
1244       Tmp : Unvisited_Files_Access;
1245
1246    begin
1247       if Unvisited_Files = null then
1248          return Empty_File;
1249       else
1250          Tmp := Unvisited_Files;
1251          Ref := Unvisited_Files.File;
1252          Unvisited_Files := Unvisited_Files.Next;
1253          Unchecked_Free (Tmp);
1254          return Ref;
1255       end if;
1256    end Next_Unvisited_File;
1257
1258    ----------------------
1259    -- Parse_Gnatls_Src --
1260    ----------------------
1261
1262    function Parse_Gnatls_Src return String is
1263       Length : Natural;
1264
1265    begin
1266       Length := 0;
1267       for J in 1 .. Osint.Nb_Dir_In_Src_Search_Path loop
1268          if Osint.Dir_In_Src_Search_Path (J)'Length = 0 then
1269             Length := Length + 2;
1270          else
1271             Length := Length + Osint.Dir_In_Src_Search_Path (J)'Length + 1;
1272          end if;
1273       end loop;
1274
1275       declare
1276          Result : String (1 .. Length);
1277          L      : Natural;
1278
1279       begin
1280          L := Result'First;
1281          for J in 1 .. Osint.Nb_Dir_In_Src_Search_Path loop
1282             if Osint.Dir_In_Src_Search_Path (J)'Length = 0 then
1283                Result (L .. L + 1) := "." & Path_Separator;
1284                L := L + 2;
1285
1286             else
1287                Result (L .. L + Osint.Dir_In_Src_Search_Path (J)'Length - 1) :=
1288                  Osint.Dir_In_Src_Search_Path (J).all;
1289                L := L + Osint.Dir_In_Src_Search_Path (J)'Length;
1290                Result (L) := Path_Separator;
1291                L := L + 1;
1292             end if;
1293          end loop;
1294
1295          return Result;
1296       end;
1297    end Parse_Gnatls_Src;
1298
1299    ----------------------
1300    -- Parse_Gnatls_Obj --
1301    ----------------------
1302
1303    function Parse_Gnatls_Obj return String is
1304       Length : Natural;
1305
1306    begin
1307       Length := 0;
1308       for J in 1 .. Osint.Nb_Dir_In_Obj_Search_Path loop
1309          if Osint.Dir_In_Obj_Search_Path (J)'Length = 0 then
1310             Length := Length + 2;
1311          else
1312             Length := Length + Osint.Dir_In_Obj_Search_Path (J)'Length + 1;
1313          end if;
1314       end loop;
1315
1316       declare
1317          Result : String (1 .. Length);
1318          L      : Natural;
1319
1320       begin
1321          L := Result'First;
1322          for J in 1 .. Osint.Nb_Dir_In_Obj_Search_Path loop
1323             if Osint.Dir_In_Obj_Search_Path (J)'Length = 0 then
1324                Result (L .. L + 1) := "." & Path_Separator;
1325                L := L + 2;
1326             else
1327                Result (L .. L + Osint.Dir_In_Obj_Search_Path (J)'Length - 1) :=
1328                  Osint.Dir_In_Obj_Search_Path (J).all;
1329                L := L + Osint.Dir_In_Obj_Search_Path (J)'Length;
1330                Result (L) := Path_Separator;
1331                L := L + 1;
1332             end if;
1333          end loop;
1334
1335          return Result;
1336       end;
1337    end Parse_Gnatls_Obj;
1338
1339    -------------------
1340    -- Reset_Obj_Dir --
1341    -------------------
1342
1343    procedure Reset_Obj_Dir is
1344    begin
1345       Directories.Obj_Dir_Index := 1;
1346    end Reset_Obj_Dir;
1347
1348    -----------------------
1349    -- Set_Default_Match --
1350    -----------------------
1351
1352    procedure Set_Default_Match (Value : Boolean) is
1353    begin
1354       Default_Match := Value;
1355    end Set_Default_Match;
1356
1357    ----------
1358    -- Free --
1359    ----------
1360
1361    procedure Free (Str : in out Cst_String_Access) is
1362       function Convert is new Ada.Unchecked_Conversion
1363         (Cst_String_Access, GNAT.OS_Lib.String_Access);
1364
1365       S : GNAT.OS_Lib.String_Access := Convert (Str);
1366
1367    begin
1368       Free (S);
1369       Str := null;
1370    end Free;
1371
1372    ---------------------
1373    -- Reset_Directory --
1374    ---------------------
1375
1376    procedure Reset_Directory (File : File_Reference) is
1377    begin
1378       Free (File.Dir);
1379    end Reset_Directory;
1380
1381    -------------------
1382    -- Set_Unvisited --
1383    -------------------
1384
1385    procedure Set_Unvisited (File_Ref : File_Reference) is
1386       F : constant String := Get_File (File_Ref, With_Dir => False);
1387
1388    begin
1389       File_Ref.Visited := False;
1390
1391       --  ??? Do not add a source file to the list. This is true at
1392       --  least for gnatxref, and probably for gnatfind as well
1393
1394       if F'Length > 4
1395         and then F (F'Last - 3 .. F'Last) = ".ali"
1396       then
1397          Unvisited_Files := new Unvisited_Files_Record'
1398            (File => File_Ref,
1399             Next => Unvisited_Files);
1400       end if;
1401    end Set_Unvisited;
1402
1403    ----------------------
1404    -- Get_Declarations --
1405    ----------------------
1406
1407    function Get_Declarations
1408      (Sorted : Boolean := True)
1409       return   Declaration_Array_Access
1410    is
1411       Arr   : constant Declaration_Array_Access :=
1412                 new Declaration_Array (1 .. Entities_Count);
1413       Decl  : Declaration_Reference := Entities_HTable.Get_First;
1414       Index : Natural               := Arr'First;
1415       Tmp   : Declaration_Reference;
1416
1417       procedure Move (From : Natural; To : Natural);
1418       function Lt (Op1, Op2 : Natural) return Boolean;
1419       --  See GNAT.Heap_Sort_G
1420
1421       --------
1422       -- Lt --
1423       --------
1424
1425       function Lt (Op1, Op2 : Natural) return Boolean is
1426       begin
1427          if Op1 = 0 then
1428             return Is_Less_Than (Tmp, Arr (Op2));
1429          elsif Op2 = 0 then
1430             return Is_Less_Than (Arr (Op1), Tmp);
1431          else
1432             return Is_Less_Than (Arr (Op1), Arr (Op2));
1433          end if;
1434       end Lt;
1435
1436       ----------
1437       -- Move --
1438       ----------
1439
1440       procedure Move (From : Natural; To : Natural) is
1441       begin
1442          if To = 0 then
1443             Tmp := Arr (From);
1444          elsif From = 0 then
1445             Arr (To) := Tmp;
1446          else
1447             Arr (To) := Arr (From);
1448          end if;
1449       end Move;
1450
1451       package Decl_Sort is new GNAT.Heap_Sort_G (Move, Lt);
1452
1453    --  Start of processing for Get_Declarations
1454
1455    begin
1456       while Decl /= null loop
1457          Arr (Index) := Decl;
1458          Index := Index + 1;
1459          Decl := Entities_HTable.Get_Next;
1460       end loop;
1461
1462       if Sorted and then Arr'Length /= 0 then
1463          Decl_Sort.Sort (Entities_Count);
1464       end if;
1465
1466       return Arr;
1467    end Get_Declarations;
1468
1469    ----------------------
1470    -- References_Count --
1471    ----------------------
1472
1473    function References_Count
1474      (Decl       : Declaration_Reference;
1475       Get_Reads  : Boolean := False;
1476       Get_Writes : Boolean := False;
1477       Get_Bodies : Boolean := False)
1478       return       Natural
1479    is
1480       function List_Length (E : Reference) return Natural;
1481       --  Return the number of references in E
1482
1483       -----------------
1484       -- List_Length --
1485       -----------------
1486
1487       function List_Length (E : Reference) return Natural is
1488          L  : Natural := 0;
1489          E1 : Reference := E;
1490
1491       begin
1492          while E1 /= null loop
1493             L := L + 1;
1494             E1 := E1.Next;
1495          end loop;
1496
1497          return L;
1498       end List_Length;
1499
1500       Length : Natural := 0;
1501
1502    --  Start of processing for References_Count
1503
1504    begin
1505       if Get_Reads then
1506          Length := List_Length (Decl.Ref_Ref);
1507       end if;
1508
1509       if Get_Writes then
1510          Length := Length + List_Length (Decl.Modif_Ref);
1511       end if;
1512
1513       if Get_Bodies then
1514          Length := Length + List_Length (Decl.Body_Ref);
1515       end if;
1516
1517       return Length;
1518    end References_Count;
1519
1520    ----------------------
1521    -- Store_References --
1522    ----------------------
1523
1524    procedure Store_References
1525      (Decl            : Declaration_Reference;
1526       Get_Writes      : Boolean := False;
1527       Get_Reads       : Boolean := False;
1528       Get_Bodies      : Boolean := False;
1529       Get_Declaration : Boolean := False;
1530       Arr             : in out Reference_Array;
1531       Index           : in out Natural)
1532    is
1533       procedure Add (List : Reference);
1534       --  Add all the references in List to Arr
1535
1536       ---------
1537       -- Add --
1538       ---------
1539
1540       procedure Add (List : Reference) is
1541          E : Reference := List;
1542       begin
1543          while E /= null loop
1544             Arr (Index) := E;
1545             Index := Index + 1;
1546             E := E.Next;
1547          end loop;
1548       end Add;
1549
1550    --  Start of processing for Store_References
1551
1552    begin
1553       if Get_Declaration then
1554          Add (Decl.Decl);
1555       end if;
1556
1557       if Get_Reads then
1558          Add (Decl.Ref_Ref);
1559       end if;
1560
1561       if Get_Writes then
1562          Add (Decl.Modif_Ref);
1563       end if;
1564
1565       if Get_Bodies then
1566          Add (Decl.Body_Ref);
1567       end if;
1568    end Store_References;
1569
1570    --------------------
1571    -- Get_References --
1572    --------------------
1573
1574    function Get_References
1575      (Decl : Declaration_Reference;
1576       Get_Reads  : Boolean := False;
1577       Get_Writes : Boolean := False;
1578       Get_Bodies : Boolean := False)
1579       return       Reference_Array_Access
1580    is
1581       Length : constant Natural :=
1582                  References_Count (Decl, Get_Reads, Get_Writes, Get_Bodies);
1583
1584       Arr : constant Reference_Array_Access :=
1585               new Reference_Array (1 .. Length);
1586
1587       Index : Natural := Arr'First;
1588
1589    begin
1590       Store_References
1591         (Decl            => Decl,
1592          Get_Writes      => Get_Writes,
1593          Get_Reads       => Get_Reads,
1594          Get_Bodies      => Get_Bodies,
1595          Get_Declaration => False,
1596          Arr             => Arr.all,
1597          Index           => Index);
1598
1599       if Arr'Length /= 0 then
1600          Sort (Arr.all);
1601       end if;
1602
1603       return Arr;
1604    end Get_References;
1605
1606    ----------
1607    -- Free --
1608    ----------
1609
1610    procedure Free (Arr : in out Reference_Array_Access) is
1611       procedure Internal is new Ada.Unchecked_Deallocation
1612         (Reference_Array, Reference_Array_Access);
1613    begin
1614       Internal (Arr);
1615    end Free;
1616
1617    ------------------
1618    -- Is_Parameter --
1619    ------------------
1620
1621    function Is_Parameter (Decl : Declaration_Reference) return Boolean is
1622    begin
1623       return Decl.Is_Parameter;
1624    end Is_Parameter;
1625
1626 end Xr_Tabls;