gcc/ada/gnatls.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT COMPILER COMPONENTS                         --
   4 --                                                                          --
   5 --                               G N A T L S                                --
   6 --                                                                          --
   7 --                                 B o d y                                  --
   8 --                                                                          --
   9 --           Copyright (C) 1992-2004 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,  59 Temple Place - Suite 330,  Boston, --
  20 -- MA 02111-1307, 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 ALI;         use ALI;
  28 with ALI.Util;    use ALI.Util;
  29 with Binderr;     use Binderr;
  30 with Butil;       use Butil;
  31 with Csets;       use Csets;
  32 with Fname;       use Fname;
  33 with Gnatvsn;     use Gnatvsn;
  34 with GNAT.OS_Lib; use GNAT.OS_Lib;
  35 with Namet;       use Namet;
  36 with Opt;         use Opt;
  37 with Osint;       use Osint;
  38 with Osint.L;     use Osint.L;
  39 with Output;      use Output;
  40 with Rident;      use Rident;
  41 with Snames;
  42 with Targparm;    use Targparm;
  43 with Types;       use Types;
  44
  45 with GNAT.Case_Util; use GNAT.Case_Util;
  46
  47 procedure Gnatls is
  48    pragma Ident (Gnat_Static_Version_String);
  49
  50    Max_Column : constant := 80;
  51
  52    No_Obj : aliased String := "<no_obj>";
  53
  54    type File_Status is (
  55      OK,                  --  matching timestamp
  56      Checksum_OK,         --  only matching checksum
  57      Not_Found,           --  file not found on source PATH
  58      Not_Same,            --  neither checksum nor timestamp matching
  59      Not_First_On_PATH);  --  matching file hidden by Not_Same file on path
  60
  61    type Dir_Data;
  62    type Dir_Ref is access Dir_Data;
  63
  64    type Dir_Data is record
  65       Value : String_Access;
  66       Next  : Dir_Ref;
  67    end record;
  68    --  ??? comment needed
  69
  70    First_Source_Dir : Dir_Ref;
  71    Last_Source_Dir  : Dir_Ref;
  72    --  The list of source directories from the command line.
  73    --  These directories are added using Osint.Add_Src_Search_Dir
  74    --  after those of the GNAT Project File, if any.
  75
  76    First_Lib_Dir : Dir_Ref;
  77    Last_Lib_Dir  : Dir_Ref;
  78    --  The list of object directories from the command line.
  79    --  These directories are added using Osint.Add_Lib_Search_Dir
  80    --  after those of the GNAT Project File, if any.
  81
  82    Main_File : File_Name_Type;
  83    Ali_File  : File_Name_Type;
  84    Text      : Text_Buffer_Ptr;
  85    Next_Arg  : Positive;
  86
  87    Too_Long : Boolean := False;
  88    --  When True, lines are too long for multi-column output and each
  89    --  item of information is on a different line.
  90
  91    Selective_Output : Boolean := False;
  92    Print_Usage      : Boolean := False;
  93    Print_Unit       : Boolean := True;
  94    Print_Source     : Boolean := True;
  95    Print_Object     : Boolean := True;
  96    --  Flags controlling the form of the output
  97
  98    Dependable  : Boolean := False;  --  flag -d
  99    Also_Predef : Boolean := False;
 100
 101    Unit_Start   : Integer;
 102    Unit_End     : Integer;
 103    Source_Start : Integer;
 104    Source_End   : Integer;
 105    Object_Start : Integer;
 106    Object_End   : Integer;
 107    --  Various column starts and ends
 108
 109    Spaces : constant String (1 .. Max_Column) := (others => ' ');
 110
 111    RTS_Specified : String_Access := null;
 112    --  Used to detect multiple use of --RTS= switch
 113
 114    -----------------------
 115    -- Local Subprograms --
 116    -----------------------
 117
 118    procedure Add_Lib_Dir (Dir : String);
 119    --  Add an object directory in the list First_Lib_Dir-Last_Lib_Dir
 120
 121    procedure Add_Source_Dir (Dir : String);
 122    --  Add a source directory in the list First_Source_Dir-Last_Source_Dir
 123
 124    procedure Find_General_Layout;
 125    --  Determine the structure of the output (multi columns or not, etc)
 126
 127    procedure Find_Status
 128      (FS       : in out File_Name_Type;
 129       Stamp    : Time_Stamp_Type;
 130       Checksum : Word;
 131       Status   : out File_Status);
 132    --  Determine the file status (Status) of the file represented by FS
 133    --  with the expected Stamp and checksum given as argument. FS will be
 134    --  updated to the full file name if available.
 135
 136    function Corresponding_Sdep_Entry (A : ALI_Id; U : Unit_Id) return Sdep_Id;
 137    --  Give the Sdep entry corresponding to the unit U in ali record A
 138
 139    procedure Output_Object (O : File_Name_Type);
 140    --  Print out the name of the object when requested
 141
 142    procedure Output_Source (Sdep_I : Sdep_Id);
 143    --  Print out the name and status of the source corresponding to this
 144    --  sdep entry.
 145
 146    procedure Output_Status (FS : File_Status; Verbose : Boolean);
 147    --  Print out FS either in a coded form if verbose is false or in an
 148    --  expanded form otherwise.
 149
 150    procedure Output_Unit (ALI : ALI_Id; U_Id : Unit_Id);
 151    --  Print out information on the unit when requested
 152
 153    procedure Reset_Print;
 154    --  Reset Print flags properly when selective output is chosen
 155
 156    procedure Scan_Ls_Arg (Argv : String);
 157    --  Scan and process lser specific arguments. Argv is a single argument
 158
 159    procedure Usage;
 160    --  Print usage message
 161
 162    function Image (Restriction : Restriction_Id) return String;
 163    --  Returns the capitalized image of Restriction
 164
 165    -----------------
 166    -- Add_Lib_Dir --
 167    -----------------
 168
 169    procedure Add_Lib_Dir (Dir : String) is
 170    begin
 171       if First_Lib_Dir = null then
 172          First_Lib_Dir :=
 173            new Dir_Data'
 174              (Value => new String'(Dir),
 175               Next  => null);
 176          Last_Lib_Dir := First_Lib_Dir;
 177
 178       else
 179          Last_Lib_Dir.Next :=
 180            new Dir_Data'
 181              (Value => new String'(Dir),
 182               Next  => null);
 183          Last_Lib_Dir := Last_Lib_Dir.Next;
 184       end if;
 185    end Add_Lib_Dir;
 186
 187    -- -----------------
 188    -- Add_Source_Dir --
 189    --------------------
 190
 191    procedure Add_Source_Dir (Dir : String) is
 192    begin
 193       if First_Source_Dir = null then
 194          First_Source_Dir :=
 195            new Dir_Data'
 196              (Value => new String'(Dir),
 197               Next  => null);
 198          Last_Source_Dir := First_Source_Dir;
 199
 200       else
 201          Last_Source_Dir.Next :=
 202            new Dir_Data'
 203              (Value => new String'(Dir),
 204               Next  => null);
 205          Last_Source_Dir := Last_Source_Dir.Next;
 206       end if;
 207    end Add_Source_Dir;
 208
 209    ------------------------------
 210    -- Corresponding_Sdep_Entry --
 211    ------------------------------
 212
 213    function Corresponding_Sdep_Entry
 214      (A : ALI_Id;
 215       U : Unit_Id) return Sdep_Id
 216    is
 217    begin
 218       for D in ALIs.Table (A).First_Sdep .. ALIs.Table (A).Last_Sdep loop
 219          if Sdep.Table (D).Sfile = Units.Table (U).Sfile then
 220             return D;
 221          end if;
 222       end loop;
 223
 224       Error_Msg_Name_1 := Units.Table (U).Uname;
 225       Error_Msg_Name_2 := ALIs.Table (A).Afile;
 226       Write_Eol;
 227       Error_Msg ("wrong ALI format, can't find dependency line for & in %");
 228       Exit_Program (E_Fatal);
 229    end Corresponding_Sdep_Entry;
 230
 231    -------------------------
 232    -- Find_General_Layout --
 233    -------------------------
 234
 235    procedure Find_General_Layout is
 236       Max_Unit_Length : Integer := 11;
 237       Max_Src_Length  : Integer := 11;
 238       Max_Obj_Length  : Integer := 11;
 239
 240       Len : Integer;
 241       FS  : File_Name_Type;
 242
 243    begin
 244       --  Compute maximum of each column
 245
 246       for Id in ALIs.First .. ALIs.Last loop
 247          Get_Name_String (Units.Table (ALIs.Table (Id).First_Unit).Uname);
 248          if Also_Predef or else not Is_Internal_Unit then
 249
 250             if Print_Unit then
 251                Len := Name_Len - 1;
 252                Max_Unit_Length := Integer'Max (Max_Unit_Length, Len);
 253             end if;
 254
 255             if Print_Source then
 256                FS := Full_Source_Name (ALIs.Table (Id).Sfile);
 257
 258                if FS = No_File then
 259                   Get_Name_String (ALIs.Table (Id).Sfile);
 260                   Name_Len := Name_Len + 13;
 261                else
 262                   Get_Name_String (FS);
 263                end if;
 264
 265                Max_Src_Length := Integer'Max (Max_Src_Length, Name_Len + 1);
 266             end if;
 267
 268             if Print_Object then
 269                if ALIs.Table (Id).No_Object then
 270                   Max_Obj_Length :=
 271                     Integer'Max (Max_Obj_Length, No_Obj'Length);
 272                else
 273                   Get_Name_String (ALIs.Table (Id).Ofile_Full_Name);
 274                   Max_Obj_Length := Integer'Max (Max_Obj_Length, Name_Len + 1);
 275                end if;
 276             end if;
 277          end if;
 278       end loop;
 279
 280       --  Verify is output is not wider than maximum number of columns
 281
 282       Too_Long :=
 283         Verbose_Mode
 284           or else
 285             (Max_Unit_Length + Max_Src_Length + Max_Obj_Length) > Max_Column;
 286
 287       --  Set start and end of columns
 288
 289       Object_Start := 1;
 290       Object_End   := Object_Start - 1;
 291
 292       if Print_Object then
 293          Object_End   := Object_Start + Max_Obj_Length;
 294       end if;
 295
 296       Unit_Start := Object_End + 1;
 297       Unit_End   := Unit_Start - 1;
 298
 299       if Print_Unit then
 300          Unit_End   := Unit_Start + Max_Unit_Length;
 301       end if;
 302
 303       Source_Start := Unit_End + 1;
 304
 305       if Source_Start > Spaces'Last then
 306          Source_Start := Spaces'Last;
 307       end if;
 308
 309       Source_End := Source_Start - 1;
 310
 311       if Print_Source then
 312          Source_End   := Source_Start + Max_Src_Length;
 313       end if;
 314    end Find_General_Layout;
 315
 316    -----------------
 317    -- Find_Status --
 318    -----------------
 319
 320    procedure Find_Status
 321      (FS       : in out File_Name_Type;
 322       Stamp    : Time_Stamp_Type;
 323       Checksum : Word;
 324       Status   : out File_Status)
 325    is
 326       Tmp1 : File_Name_Type;
 327       Tmp2 : File_Name_Type;
 328
 329    begin
 330       Tmp1 := Full_Source_Name (FS);
 331
 332       if Tmp1 = No_File then
 333          Status := Not_Found;
 334
 335       elsif File_Stamp (Tmp1) = Stamp then
 336          FS     := Tmp1;
 337          Status := OK;
 338
 339       elsif Checksums_Match (Get_File_Checksum (FS), Checksum) then
 340          FS := Tmp1;
 341          Status := Checksum_OK;
 342
 343       else
 344          Tmp2 := Matching_Full_Source_Name (FS, Stamp);
 345
 346          if Tmp2 = No_File then
 347             Status := Not_Same;
 348             FS     := Tmp1;
 349
 350          else
 351             Status := Not_First_On_PATH;
 352             FS := Tmp2;
 353          end if;
 354       end if;
 355    end Find_Status;
 356
 357    -----------
 358    -- Image --
 359    -----------
 360
 361    function Image (Restriction : Restriction_Id) return String is
 362       Result : String := Restriction'Img;
 363       Skip   : Boolean := True;
 364
 365    begin
 366       for J in Result'Range loop
 367          if Skip then
 368             Skip := False;
 369             Result (J) := To_Upper (Result (J));
 370
 371          elsif Result (J) = '_' then
 372             Skip := True;
 373
 374          else
 375             Result (J) := To_Lower (Result (J));
 376          end if;
 377       end loop;
 378
 379       return Result;
 380    end Image;
 381
 382    -------------------
 383    -- Output_Object --
 384    -------------------
 385
 386    procedure Output_Object (O : File_Name_Type) is
 387       Object_Name : String_Access;
 388
 389    begin
 390       if Print_Object then
 391          if O /= No_File then
 392             Get_Name_String (O);
 393             Object_Name := To_Host_File_Spec (Name_Buffer (1 .. Name_Len));
 394          else
 395             Object_Name := No_Obj'Unchecked_Access;
 396          end if;
 397
 398          Write_Str (Object_Name.all);
 399
 400          if Print_Source or else Print_Unit then
 401             if Too_Long then
 402                Write_Eol;
 403                Write_Str ("   ");
 404             else
 405                Write_Str (Spaces
 406                 (Object_Start + Object_Name'Length .. Object_End));
 407             end if;
 408          end if;
 409       end if;
 410    end Output_Object;
 411
 412    -------------------
 413    -- Output_Source --
 414    -------------------
 415
 416    procedure Output_Source (Sdep_I : Sdep_Id) is
 417       Stamp       : constant Time_Stamp_Type := Sdep.Table (Sdep_I).Stamp;
 418       Checksum    : constant Word            := Sdep.Table (Sdep_I).Checksum;
 419       FS          : File_Name_Type           := Sdep.Table (Sdep_I).Sfile;
 420       Status      : File_Status;
 421       Object_Name : String_Access;
 422
 423    begin
 424       if Print_Source then
 425          Find_Status (FS, Stamp, Checksum, Status);
 426          Get_Name_String (FS);
 427
 428          Object_Name := To_Host_File_Spec (Name_Buffer (1 .. Name_Len));
 429
 430          if Verbose_Mode then
 431             Write_Str ("  Source => ");
 432             Write_Str (Object_Name.all);
 433
 434             if not Too_Long then
 435                Write_Str
 436                  (Spaces (Source_Start + Object_Name'Length .. Source_End));
 437             end if;
 438
 439             Output_Status (Status, Verbose => True);
 440             Write_Eol;
 441             Write_Str ("   ");
 442
 443          else
 444             if not Selective_Output then
 445                Output_Status (Status, Verbose => False);
 446             end if;
 447
 448             Write_Str (Object_Name.all);
 449          end if;
 450       end if;
 451    end Output_Source;
 452
 453    -------------------
 454    -- Output_Status --
 455    -------------------
 456
 457    procedure Output_Status (FS : File_Status; Verbose : Boolean) is
 458    begin
 459       if Verbose then
 460          case FS is
 461             when OK =>
 462                Write_Str (" unchanged");
 463
 464             when Checksum_OK =>
 465                Write_Str (" slightly modified");
 466
 467             when Not_Found =>
 468                Write_Str (" file not found");
 469
 470             when Not_Same =>
 471                Write_Str (" modified");
 472
 473             when Not_First_On_PATH =>
 474                Write_Str (" unchanged version not first on PATH");
 475          end case;
 476
 477       else
 478          case FS is
 479             when OK =>
 480                Write_Str ("  OK ");
 481
 482             when Checksum_OK =>
 483                Write_Str (" MOK ");
 484
 485             when Not_Found =>
 486                Write_Str (" ??? ");
 487
 488             when Not_Same =>
 489                Write_Str (" DIF ");
 490
 491             when Not_First_On_PATH =>
 492                Write_Str (" HID ");
 493          end case;
 494       end if;
 495    end Output_Status;
 496
 497    -----------------
 498    -- Output_Unit --
 499    -----------------
 500
 501    procedure Output_Unit (ALI : ALI_Id; U_Id : Unit_Id) is
 502       Kind : Character;
 503       U    : Unit_Record renames Units.Table (U_Id);
 504
 505    begin
 506       if Print_Unit then
 507          Get_Name_String (U.Uname);
 508          Kind := Name_Buffer (Name_Len);
 509          Name_Len := Name_Len - 2;
 510
 511          if not Verbose_Mode then
 512             Write_Str (Name_Buffer (1 .. Name_Len));
 513
 514          else
 515             Write_Str ("Unit => ");
 516             Write_Eol; Write_Str ("     Name   => ");
 517             Write_Str (Name_Buffer (1 .. Name_Len));
 518             Write_Eol; Write_Str ("     Kind   => ");
 519
 520             if Units.Table (U_Id).Unit_Kind = 'p' then
 521                Write_Str ("package ");
 522             else
 523                Write_Str ("subprogram ");
 524             end if;
 525
 526             if Kind = 's' then
 527                Write_Str ("spec");
 528             else
 529                Write_Str ("body");
 530             end if;
 531          end if;
 532
 533          if Verbose_Mode then
 534             if U.Preelab             or
 535                U.No_Elab             or
 536                U.Pure                or
 537                U.Dynamic_Elab        or
 538                U.Has_RACW            or
 539                U.Remote_Types        or
 540                U.Shared_Passive      or
 541                U.RCI                 or
 542                U.Predefined          or
 543                U.Internal            or
 544                U.Is_Generic          or
 545                U.Init_Scalars        or
 546                U.Interface           or
 547                U.Body_Needed_For_SAL or
 548                U.Elaborate_Body
 549             then
 550                Write_Eol; Write_Str ("     Flags  =>");
 551
 552                if U.Preelab then
 553                   Write_Str (" Preelaborable");
 554                end if;
 555
 556                if U.No_Elab then
 557                   Write_Str (" No_Elab_Code");
 558                end if;
 559
 560                if U.Pure then
 561                   Write_Str (" Pure");
 562                end if;
 563
 564                if U.Dynamic_Elab then
 565                   Write_Str (" Dynamic_Elab");
 566                end if;
 567
 568                if U.Has_RACW then
 569                   Write_Str (" Has_RACW");
 570                end if;
 571
 572                if U.Remote_Types then
 573                   Write_Str (" Remote_Types");
 574                end if;
 575
 576                if U.Shared_Passive then
 577                   Write_Str (" Shared_Passive");
 578                end if;
 579
 580                if U.RCI then
 581                   Write_Str (" RCI");
 582                end if;
 583
 584                if U.Predefined then
 585                   Write_Str (" Predefined");
 586                end if;
 587
 588                if U.Internal then
 589                   Write_Str (" Internal");
 590                end if;
 591
 592                if U.Is_Generic then
 593                   Write_Str (" Is_Generic");
 594                end if;
 595
 596                if U.Init_Scalars then
 597                   Write_Str (" Init_Scalars");
 598                end if;
 599
 600                if U.Interface then
 601                   Write_Str (" Interface");
 602                end if;
 603
 604                if U.Body_Needed_For_SAL then
 605                   Write_Str (" Body_Needed_For_SAL");
 606                end if;
 607
 608                if U.Elaborate_Body then
 609                   Write_Str (" Elaborate Body");
 610                end if;
 611
 612                if U.Remote_Types then
 613                   Write_Str (" Remote_Types");
 614                end if;
 615
 616                if U.Shared_Passive then
 617                   Write_Str (" Shared_Passive");
 618                end if;
 619
 620                if U.Predefined then
 621                   Write_Str (" Predefined");
 622                end if;
 623
 624             end if;
 625
 626             declare
 627                Restrictions : constant Restrictions_Info :=
 628                                 ALIs.Table (ALI).Restrictions;
 629             begin
 630                --  If the source was compiled with pragmas Restrictions,
 631                --  Display these restrictions.
 632
 633                if Restrictions.Set /= (All_Restrictions => False) then
 634                   Write_Eol; Write_Str ("     Restrictions  =>");
 635
 636                   --  For boolean restrictions, just display the name of the
 637                   --  restriction; for valued restrictions, also display the
 638                   --  restriction value.
 639
 640                   for Restriction in All_Restrictions loop
 641                      if Restrictions.Set (Restriction) then
 642                         Write_Eol;
 643                         Write_Str ("       ");
 644                         Write_Str (Image (Restriction));
 645
 646                         if Restriction in All_Parameter_Restrictions then
 647                            Write_Str (" =>");
 648                            Write_Str (Restrictions.Value (Restriction)'Img);
 649                         end if;
 650                      end if;
 651                   end loop;
 652                end if;
 653             end;
 654          end if;
 655
 656          if Print_Source then
 657             if Too_Long then
 658                Write_Eol; Write_Str ("   ");
 659             else
 660                Write_Str (Spaces (Unit_Start + Name_Len + 1 .. Unit_End));
 661             end if;
 662          end if;
 663       end if;
 664    end Output_Unit;
 665
 666    -----------------
 667    -- Reset_Print --
 668    -----------------
 669
 670    procedure Reset_Print is
 671    begin
 672       if not Selective_Output then
 673          Selective_Output := True;
 674          Print_Source := False;
 675          Print_Object := False;
 676          Print_Unit   := False;
 677       end if;
 678    end Reset_Print;
 679
 680    -------------------
 681    -- Scan_Ls_Arg --
 682    -------------------
 683
 684    procedure Scan_Ls_Arg (Argv : String) is
 685       FD  : File_Descriptor;
 686       Len : Integer;
 687    begin
 688       pragma Assert (Argv'First = 1);
 689
 690       if Argv'Length = 0 then
 691          return;
 692       end if;
 693
 694       if Argv (1) = '-' then
 695
 696          if Argv'Length = 1 then
 697             Fail ("switch character cannot be followed by a blank");
 698
 699          --  Processing for -I-
 700
 701          elsif Argv (2 .. Argv'Last) = "I-" then
 702             Opt.Look_In_Primary_Dir := False;
 703
 704          --  Forbid -?- or -??- where ? is any character
 705
 706          elsif (Argv'Length = 3 and then Argv (3) = '-')
 707            or else (Argv'Length = 4 and then Argv (4) = '-')
 708          then
 709             Fail ("Trailing ""-"" at the end of ", Argv, " forbidden.");
 710
 711          --  Processing for -Idir
 712
 713          elsif Argv (2) = 'I' then
 714             Add_Source_Dir (Argv (3 .. Argv'Last));
 715             Add_Lib_Dir (Argv (3 .. Argv'Last));
 716
 717          --  Processing for -aIdir (to gcc this is like a -I switch)
 718
 719          elsif Argv'Length >= 3 and then Argv (2 .. 3) = "aI" then
 720             Add_Source_Dir (Argv (4 .. Argv'Last));
 721
 722          --  Processing for -aOdir
 723
 724          elsif Argv'Length >= 3 and then Argv (2 .. 3) = "aO" then
 725             Add_Lib_Dir (Argv (4 .. Argv'Last));
 726
 727          --  Processing for -aLdir (to gnatbind this is like a -aO switch)
 728
 729          elsif Argv'Length >= 3 and then Argv (2 .. 3) = "aL" then
 730             Add_Lib_Dir (Argv (4 .. Argv'Last));
 731
 732          --  Processing for -nostdinc
 733
 734          elsif Argv (2 .. Argv'Last) = "nostdinc" then
 735             Opt.No_Stdinc := True;
 736
 737          --  Processing for one character switches
 738
 739          elsif Argv'Length = 2 then
 740             case Argv (2) is
 741                when 'a' => Also_Predef               := True;
 742                when 'h' => Print_Usage               := True;
 743                when 'u' => Reset_Print; Print_Unit   := True;
 744                when 's' => Reset_Print; Print_Source := True;
 745                when 'o' => Reset_Print; Print_Object := True;
 746                when 'v' => Verbose_Mode              := True;
 747                when 'd' => Dependable                := True;
 748
 749                when others => null;
 750             end case;
 751
 752          --  Processing for -files=file
 753
 754          elsif Argv'Length > 7 and then Argv (1 .. 7) = "-files=" then
 755             FD := Open_Read (Argv (8 .. Argv'Last), GNAT.OS_Lib.Text);
 756
 757             if FD = Invalid_FD then
 758                Osint.Fail ("could not find text file """ &
 759                            Argv (8 .. Argv'Last) & '"');
 760             end if;
 761
 762             Len := Integer (File_Length (FD));
 763
 764             declare
 765                Buffer : String (1 .. Len + 1);
 766                Index  : Positive := 1;
 767                Last   : Positive;
 768
 769             begin
 770                --  Read the file
 771
 772                Len := Read (FD, Buffer (1)'Address, Len);
 773                Buffer (Buffer'Last) := ASCII.NUL;
 774                Close (FD);
 775
 776                --  Scan the file line by line
 777
 778                while Index < Buffer'Last loop
 779                   --  Find the end of line
 780
 781                   Last := Index;
 782
 783                   while Last <= Buffer'Last
 784                     and then Buffer (Last) /= ASCII.LF
 785                     and then Buffer (Last) /= ASCII.CR
 786                   loop
 787                      Last := Last + 1;
 788                   end loop;
 789
 790                   --  Ignore empty lines
 791
 792                   if Last > Index then
 793                      Add_File (Buffer (Index .. Last - 1));
 794                   end if;
 795
 796                   Index := Last;
 797
 798                   --  Find the beginning of the next line
 799
 800                   while Buffer (Index) = ASCII.CR or else
 801                         Buffer (Index) = ASCII.LF
 802                   loop
 803                      Index := Index + 1;
 804                   end loop;
 805                end loop;
 806             end;
 807
 808          --  Processing for --RTS=path
 809
 810          elsif Argv'Length >= 5 and then Argv (1 .. 5) = "--RTS" then
 811             if Argv'Length <= 6 or else Argv (6) /= '='then
 812                Osint.Fail ("missing path for --RTS");
 813
 814             else
 815                --  Check that it is the first time we see this switch or, if
 816                --  it is not the first time, the same path is specified.
 817
 818                if RTS_Specified = null then
 819                   RTS_Specified := new String'(Argv (7 .. Argv'Last));
 820
 821                elsif RTS_Specified.all /= Argv (7 .. Argv'Last) then
 822                   Osint.Fail ("--RTS cannot be specified multiple times");
 823                end if;
 824
 825                --  Valid --RTS switch
 826
 827                Opt.No_Stdinc := True;
 828                Opt.RTS_Switch := True;
 829
 830                declare
 831                   Src_Path_Name : constant String_Ptr :=
 832                                     String_Ptr
 833                                       (Get_RTS_Search_Dir
 834                                         (Argv (7 .. Argv'Last), Include));
 835                   Lib_Path_Name : constant String_Ptr :=
 836                                     String_Ptr
 837                                       (Get_RTS_Search_Dir
 838                                         (Argv (7 .. Argv'Last), Objects));
 839
 840                begin
 841                   if Src_Path_Name /= null
 842                     and then Lib_Path_Name /= null
 843                   then
 844                      Add_Search_Dirs (Src_Path_Name, Include);
 845                      Add_Search_Dirs (Lib_Path_Name, Objects);
 846
 847                   elsif Src_Path_Name = null
 848                     and then Lib_Path_Name = null
 849                   then
 850                      Osint.Fail ("RTS path not valid: missing " &
 851                                  "adainclude and adalib directories");
 852
 853                   elsif Src_Path_Name = null then
 854                      Osint.Fail ("RTS path not valid: missing " &
 855                                  "adainclude directory");
 856
 857                   elsif Lib_Path_Name = null then
 858                      Osint.Fail ("RTS path not valid: missing " &
 859                                  "adalib directory");
 860                   end if;
 861                end;
 862             end if;
 863          end if;
 864
 865       --  If not a switch, it must be a file name
 866
 867       else
 868          Add_File (Argv);
 869       end if;
 870    end Scan_Ls_Arg;
 871
 872    -----------
 873    -- Usage --
 874    -----------
 875
 876    procedure Usage is
 877
 878    --  Start of processing for Usage
 879
 880    begin
 881       --  Usage line
 882
 883       Write_Str ("Usage: ");
 884       Osint.Write_Program_Name;
 885       Write_Str ("  switches  [list of object files]");
 886       Write_Eol;
 887       Write_Eol;
 888
 889       --  GNATLS switches
 890
 891       Write_Str ("switches:");
 892       Write_Eol;
 893
 894       --  Line for -a
 895
 896       Write_Str ("  -a         also output relevant predefined units");
 897       Write_Eol;
 898
 899       --  Line for -u
 900
 901       Write_Str ("  -u         output only relevant unit names");
 902       Write_Eol;
 903
 904       --  Line for -h
 905
 906       Write_Str ("  -h         output this help message");
 907       Write_Eol;
 908
 909       --  Line for -s
 910
 911       Write_Str ("  -s         output only relevant source names");
 912       Write_Eol;
 913
 914       --  Line for -o
 915
 916       Write_Str ("  -o         output only relevant object names");
 917       Write_Eol;
 918
 919       --  Line for -d
 920
 921       Write_Str ("  -d         output sources on which specified units " &
 922                                "depend");
 923       Write_Eol;
 924
 925       --  Line for -v
 926
 927       Write_Str ("  -v         verbose output, full path and unit " &
 928                                "information");
 929       Write_Eol;
 930       Write_Eol;
 931
 932       --  Line for -files=
 933
 934       Write_Str ("  -files=fil files are listed in text file 'fil'");
 935       Write_Eol;
 936
 937       --  Line for -aI switch
 938
 939       Write_Str ("  -aIdir     specify source files search path");
 940       Write_Eol;
 941
 942       --  Line for -aO switch
 943
 944       Write_Str ("  -aOdir     specify object files search path");
 945       Write_Eol;
 946
 947       --  Line for -I switch
 948
 949       Write_Str ("  -Idir      like -aIdir -aOdir");
 950       Write_Eol;
 951
 952       --  Line for -I- switch
 953
 954       Write_Str ("  -I-        do not look for sources & object files");
 955       Write_Str (" in the default directory");
 956       Write_Eol;
 957
 958       --  Line for -nostdinc
 959
 960       Write_Str ("  -nostdinc  do not look for source files");
 961       Write_Str (" in the system default directory");
 962       Write_Eol;
 963
 964       --  Line for --RTS
 965
 966       Write_Str ("  --RTS=dir  specify the default source and object search"
 967                  & " path");
 968       Write_Eol;
 969
 970       --  File Status explanation
 971
 972       Write_Eol;
 973       Write_Str (" file status can be:");
 974       Write_Eol;
 975
 976       for ST in File_Status loop
 977          Write_Str ("   ");
 978          Output_Status (ST, Verbose => False);
 979          Write_Str (" ==> ");
 980          Output_Status (ST, Verbose => True);
 981          Write_Eol;
 982       end loop;
 983
 984    end Usage;
 985
 986    --   Start of processing for Gnatls
 987
 988 begin
 989    --  Initialize standard packages
 990
 991    Namet.Initialize;
 992    Csets.Initialize;
 993    Snames.Initialize;
 994
 995    --  Loop to scan out arguments
 996
 997    Next_Arg := 1;
 998    Scan_Args : while Next_Arg < Arg_Count loop
 999       declare
1000          Next_Argv : String (1 .. Len_Arg (Next_Arg));
1001       begin
1002          Fill_Arg (Next_Argv'Address, Next_Arg);
1003          Scan_Ls_Arg (Next_Argv);
1004       end;
1005
1006       Next_Arg := Next_Arg + 1;
1007    end loop Scan_Args;
1008
1009    --  Add the source and object directories specified on the
1010    --  command line, if any, to the searched directories.
1011
1012    while First_Source_Dir /= null loop
1013       Add_Src_Search_Dir (First_Source_Dir.Value.all);
1014       First_Source_Dir := First_Source_Dir.Next;
1015    end loop;
1016
1017    while First_Lib_Dir /= null loop
1018       Add_Lib_Search_Dir (First_Lib_Dir.Value.all);
1019       First_Lib_Dir := First_Lib_Dir.Next;
1020    end loop;
1021
1022    --  Finally, add the default directories and obtain target parameters
1023
1024    Osint.Add_Default_Search_Dirs;
1025
1026    if Verbose_Mode then
1027       Targparm.Get_Target_Parameters;
1028
1029       --  WARNING: the output of gnatls -v is used during the compilation
1030       --  and installation of GLADE to recreate sdefault.adb and locate
1031       --  the libgnat.a to use. Any change in the output of gnatls -v must
1032       --  be synchronized with the GLADE Dist/config.sdefault shell script.
1033
1034       Write_Eol;
1035       Write_Str ("GNATLS ");
1036       Write_Str (Gnat_Version_String);
1037       Write_Str (" Copyright 1997-2004 Free Software Foundation, Inc.");
1038       Write_Eol;
1039       Write_Eol;
1040       Write_Str ("Source Search Path:");
1041       Write_Eol;
1042
1043       for J in 1 .. Nb_Dir_In_Src_Search_Path loop
1044          Write_Str ("   ");
1045
1046          if Dir_In_Src_Search_Path (J)'Length = 0 then
1047             Write_Str ("<Current_Directory>");
1048          else
1049             Write_Str (To_Host_Dir_Spec
1050               (Dir_In_Src_Search_Path (J).all, True).all);
1051          end if;
1052
1053          Write_Eol;
1054       end loop;
1055
1056       Write_Eol;
1057       Write_Eol;
1058       Write_Str ("Object Search Path:");
1059       Write_Eol;
1060
1061       for J in 1 .. Nb_Dir_In_Obj_Search_Path loop
1062          Write_Str ("   ");
1063
1064          if Dir_In_Obj_Search_Path (J)'Length = 0 then
1065             Write_Str ("<Current_Directory>");
1066          else
1067             Write_Str (To_Host_Dir_Spec
1068               (Dir_In_Obj_Search_Path (J).all, True).all);
1069          end if;
1070
1071          Write_Eol;
1072       end loop;
1073
1074       Write_Eol;
1075    end if;
1076
1077    --  Output usage information when requested
1078
1079    if Print_Usage then
1080       Usage;
1081    end if;
1082
1083    if not More_Lib_Files then
1084       if not Print_Usage and then not Verbose_Mode then
1085          Usage;
1086       end if;
1087
1088       Exit_Program (E_Fatal);
1089    end if;
1090
1091    Initialize_ALI;
1092    Initialize_ALI_Source;
1093
1094    --  Print out all library for which no ALI files can be located
1095
1096    while More_Lib_Files loop
1097       Main_File := Next_Main_Lib_File;
1098       Ali_File := Full_Lib_File_Name (Lib_File_Name (Main_File));
1099
1100       if Ali_File = No_File then
1101          Write_Str ("Can't find library info for ");
1102          Get_Name_String (Main_File);
1103          Write_Char ('"');
1104          Write_Str (Name_Buffer (1 .. Name_Len));
1105          Write_Char ('"');
1106          Write_Eol;
1107
1108       else
1109          Ali_File := Strip_Directory (Ali_File);
1110
1111          if Get_Name_Table_Info (Ali_File) = 0 then
1112             Text := Read_Library_Info (Ali_File, True);
1113
1114             declare
1115                Discard : ALI_Id;
1116                pragma Unreferenced (Discard);
1117             begin
1118                Discard :=
1119                  Scan_ALI
1120                    (Ali_File,
1121                     Text,
1122                     Ignore_ED     => False,
1123                     Err           => False,
1124                     Ignore_Errors => True);
1125             end;
1126
1127             Free (Text);
1128          end if;
1129       end if;
1130    end loop;
1131
1132    Find_General_Layout;
1133
1134    for Id in ALIs.First .. ALIs.Last loop
1135       declare
1136          Last_U : Unit_Id;
1137
1138       begin
1139          Get_Name_String (Units.Table (ALIs.Table (Id).First_Unit).Uname);
1140
1141          if Also_Predef or else not Is_Internal_Unit then
1142             if ALIs.Table (Id).No_Object then
1143                Output_Object (No_File);
1144             else
1145                Output_Object (ALIs.Table (Id).Ofile_Full_Name);
1146             end if;
1147
1148             --  In verbose mode print all main units in the ALI file, otherwise
1149             --  just print the first one to ease columnwise printout
1150
1151             if Verbose_Mode then
1152                Last_U := ALIs.Table (Id).Last_Unit;
1153             else
1154                Last_U := ALIs.Table (Id).First_Unit;
1155             end if;
1156
1157             for U in ALIs.Table (Id).First_Unit .. Last_U loop
1158                if U /= ALIs.Table (Id).First_Unit
1159                  and then Selective_Output
1160                  and then Print_Unit
1161                then
1162                   Write_Eol;
1163                end if;
1164
1165                Output_Unit (Id, U);
1166
1167                --  Output source now, unless if it will be done as part of
1168                --  outputing dependencies.
1169
1170                if not (Dependable and then Print_Source) then
1171                   Output_Source (Corresponding_Sdep_Entry (Id, U));
1172                end if;
1173             end loop;
1174
1175             --  Print out list of units on which this unit depends (D lines)
1176
1177             if Dependable and then Print_Source then
1178                if Verbose_Mode then
1179                   Write_Str ("depends upon");
1180                   Write_Eol;
1181                   Write_Str ("   ");
1182
1183                else
1184                   Write_Eol;
1185                end if;
1186
1187                for D in
1188                  ALIs.Table (Id).First_Sdep .. ALIs.Table (Id).Last_Sdep
1189                loop
1190                   if Also_Predef
1191                     or else not Is_Internal_File_Name (Sdep.Table (D).Sfile)
1192                   then
1193                      if Verbose_Mode then
1194                         Write_Str ("   ");
1195                         Output_Source (D);
1196
1197                      elsif Too_Long then
1198                         Write_Str ("   ");
1199                         Output_Source (D);
1200                         Write_Eol;
1201
1202                      else
1203                         Write_Str (Spaces (1 .. Source_Start - 2));
1204                         Output_Source (D);
1205                         Write_Eol;
1206                      end if;
1207                   end if;
1208                end loop;
1209             end if;
1210
1211             Write_Eol;
1212          end if;
1213       end;
1214    end loop;
1215
1216    --  All done. Set proper exit status
1217
1218    Namet.Finalize;
1219    Exit_Program (E_Success);
1220 end Gnatls;