gcc/ada/gnatxref.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT COMPILER COMPONENTS                         --
   4 --                                                                          --
   5 --                             G N A T X R E F                              --
   6 --                                                                          --
   7 --                                 B o d y                                  --
   8 --                                                                          --
   9 --          Copyright (C) 1998-2007, 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 Opt;
  27 with Osint;    use Osint;
  28 with Types;    use Types;
  29 with Switch;   use Switch;
  30 with Xr_Tabls; use Xr_Tabls;
  31 with Xref_Lib; use Xref_Lib;
  32
  33 with Ada.Strings.Fixed; use Ada.Strings.Fixed;
  34 with Ada.Text_IO;       use Ada.Text_IO;
  35
  36 with GNAT.Command_Line; use GNAT.Command_Line;
  37
  38 with System.Strings;    use System.Strings;
  39
  40 procedure Gnatxref is
  41    Search_Unused   : Boolean := False;
  42    Local_Symbols   : Boolean := True;
  43    Prj_File        : File_Name_String;
  44    Prj_File_Length : Natural := 0;
  45    Usage_Error     : exception;
  46    Full_Path_Name  : Boolean := False;
  47    Vi_Mode         : Boolean := False;
  48    Read_Only       : Boolean := False;
  49    Have_File       : Boolean := False;
  50    Der_Info        : Boolean := False;
  51
  52    RTS_Specified : String_Access := null;
  53    --  Used to detect multiple use of --RTS= switch
  54
  55    procedure Parse_Cmd_Line;
  56    --  Parse every switch on the command line
  57
  58    procedure Usage;
  59    --  Display the usage
  60
  61    procedure Write_Usage;
  62    --  Print a small help page for program usage
  63
  64    --------------------
  65    -- Parse_Cmd_Line --
  66    --------------------
  67
  68    procedure Parse_Cmd_Line is
  69    begin
  70       --  First check for --version or --help
  71
  72       Check_Version_And_Help ("GNATXREF", "1998", Usage'Unrestricted_Access);
  73
  74       loop
  75          case
  76            GNAT.Command_Line.Getopt
  77              ("a aI: aO: d f g h I: nostdinc nostdlib p: u v -RTS=")
  78          is
  79             when ASCII.NUL =>
  80                exit;
  81
  82             when 'a' =>
  83                if GNAT.Command_Line.Full_Switch = "a" then
  84                   Read_Only := True;
  85
  86                elsif GNAT.Command_Line.Full_Switch = "aI" then
  87                   Osint.Add_Src_Search_Dir (GNAT.Command_Line.Parameter);
  88
  89                else
  90                   Osint.Add_Lib_Search_Dir (GNAT.Command_Line.Parameter);
  91                end if;
  92
  93             when 'd' =>
  94                Der_Info := True;
  95
  96             when 'f' =>
  97                Full_Path_Name := True;
  98
  99             when 'g' =>
 100                Local_Symbols := False;
 101
 102             when 'h' =>
 103                Write_Usage;
 104
 105             when 'I' =>
 106                Osint.Add_Src_Search_Dir (GNAT.Command_Line.Parameter);
 107                Osint.Add_Lib_Search_Dir (GNAT.Command_Line.Parameter);
 108
 109             when 'n' =>
 110                if GNAT.Command_Line.Full_Switch = "nostdinc" then
 111                   Opt.No_Stdinc := True;
 112                elsif GNAT.Command_Line.Full_Switch = "nostlib" then
 113                   Opt.No_Stdlib := True;
 114                end if;
 115
 116             when 'p' =>
 117                declare
 118                   S : constant String := GNAT.Command_Line.Parameter;
 119                begin
 120                   Prj_File_Length := S'Length;
 121                   Prj_File (1 .. Prj_File_Length) := S;
 122                end;
 123
 124             when 'u' =>
 125                Search_Unused := True;
 126                Vi_Mode := False;
 127
 128             when 'v' =>
 129                Vi_Mode := True;
 130                Search_Unused := False;
 131
 132             --  The only switch starting with -- recognized is --RTS
 133
 134             when '-' =>
 135
 136                --  Check that it is the first time we see this switch
 137
 138                if RTS_Specified = null then
 139                   RTS_Specified := new String'(GNAT.Command_Line.Parameter);
 140
 141                elsif RTS_Specified.all /= GNAT.Command_Line.Parameter then
 142                   Osint.Fail ("--RTS cannot be specified multiple times");
 143                end if;
 144
 145                Opt.No_Stdinc  := True;
 146                Opt.RTS_Switch := True;
 147
 148                declare
 149                   Src_Path_Name : constant String_Ptr :=
 150                                     Get_RTS_Search_Dir
 151                                       (GNAT.Command_Line.Parameter, Include);
 152
 153                   Lib_Path_Name : constant String_Ptr :=
 154                                     Get_RTS_Search_Dir
 155                                       (GNAT.Command_Line.Parameter, Objects);
 156
 157                begin
 158                   if Src_Path_Name /= null and then Lib_Path_Name /= null then
 159                      Add_Search_Dirs (Src_Path_Name, Include);
 160                      Add_Search_Dirs (Lib_Path_Name, Objects);
 161
 162                   elsif Src_Path_Name = null and then Lib_Path_Name = null then
 163                      Osint.Fail ("RTS path not valid: missing " &
 164                                  "adainclude and adalib directories");
 165
 166                   elsif Src_Path_Name = null then
 167                      Osint.Fail ("RTS path not valid: missing " &
 168                                  "adainclude directory");
 169
 170                   elsif  Lib_Path_Name = null then
 171                      Osint.Fail ("RTS path not valid: missing " &
 172                                  "adalib directory");
 173                   end if;
 174                end;
 175
 176             when others =>
 177                Write_Usage;
 178          end case;
 179       end loop;
 180
 181       --  Get the other arguments
 182
 183       loop
 184          declare
 185             S : constant String := GNAT.Command_Line.Get_Argument;
 186
 187          begin
 188             exit when S'Length = 0;
 189
 190             if Ada.Strings.Fixed.Index (S, ":") /= 0 then
 191                Ada.Text_IO.Put_Line
 192                  ("Only file names are allowed on the command line");
 193                Write_Usage;
 194             end if;
 195
 196             Add_Xref_File (S);
 197             Have_File := True;
 198          end;
 199       end loop;
 200
 201    exception
 202       when GNAT.Command_Line.Invalid_Switch =>
 203          Ada.Text_IO.Put_Line ("Invalid switch : "
 204                                & GNAT.Command_Line.Full_Switch);
 205          Write_Usage;
 206
 207       when GNAT.Command_Line.Invalid_Parameter =>
 208          Ada.Text_IO.Put_Line ("Parameter missing for : "
 209                                & GNAT.Command_Line.Full_Switch);
 210          Write_Usage;
 211    end Parse_Cmd_Line;
 212
 213    -----------
 214    -- Usage --
 215    -----------
 216
 217    procedure Usage is
 218    begin
 219       Put_Line ("Usage: gnatxref [switches] file1 file2 ...");
 220       New_Line;
 221       Put_Line ("  file ... list of source files to xref, " &
 222                 "including with'ed units");
 223       New_Line;
 224       Put_Line ("gnatxref switches:");
 225       Put_Line ("   -a        Consider all files, even when the ali file is"
 226                 & " readonly");
 227       Put_Line ("   -aIdir    Specify source files search path");
 228       Put_Line ("   -aOdir    Specify library/object files search path");
 229       Put_Line ("   -d        Output derived type information");
 230       Put_Line ("   -f        Output full path name");
 231       Put_Line ("   -g        Output information only for global symbols");
 232       Put_Line ("   -Idir     Like -aIdir -aOdir");
 233       Put_Line ("   -nostdinc Don't look for sources in the system default"
 234                 & " directory");
 235       Put_Line ("   -nostdlib Don't look for library files in the system"
 236                 & " default directory");
 237       Put_Line ("   --RTS=dir specify the default source and object search"
 238                 & " path");
 239       Put_Line ("   -p file   Use file as the default project file");
 240       Put_Line ("   -u        List unused entities");
 241       Put_Line ("   -v        Print a 'tags' file for vi");
 242       New_Line;
 243
 244    end Usage;
 245
 246    -----------------
 247    -- Write_Usage --
 248    -----------------
 249
 250    procedure Write_Usage is
 251    begin
 252       Display_Version ("GNATXREF", "1998");
 253       New_Line;
 254       Usage;
 255       raise Usage_Error;
 256    end Write_Usage;
 257
 258 begin
 259    Parse_Cmd_Line;
 260
 261    if not Have_File then
 262       Write_Usage;
 263    end if;
 264
 265    Xr_Tabls.Set_Default_Match (True);
 266
 267    --  Find the project file
 268
 269    if Prj_File_Length = 0 then
 270       Xr_Tabls.Create_Project_File
 271         (Default_Project_File (Osint.To_Host_Dir_Spec (".", False).all));
 272    else
 273       Xr_Tabls.Create_Project_File (Prj_File (1 .. Prj_File_Length));
 274    end if;
 275
 276    --  Fill up the table
 277
 278    Search_Xref (Local_Symbols, Read_Only, Der_Info);
 279
 280    if Search_Unused then
 281       Print_Unused (Full_Path_Name);
 282    elsif Vi_Mode then
 283       Print_Vi (Full_Path_Name);
 284    else
 285       Print_Xref (Full_Path_Name);
 286    end if;
 287
 288 exception
 289    when Usage_Error =>
 290       null;
 291 end Gnatxref;