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) 1998-2005, Free Software Foundation, Inc.         --
  10 --                                                                          --
  11 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
  12 -- terms of the  GNU General Public License as published  by the Free Soft- --
  13 -- ware  Foundation;  either version 2,  or (at your option) any later ver- --
  14 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  15 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  16 -- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
  17 -- for  more details.  You should have  received  a copy of the GNU General --
  18 -- Public License  distributed with GNAT;  see file COPYING.  If not, write --
  19 -- to  the  Free Software Foundation,  51  Franklin  Street,  Fifth  Floor, --
  20 -- Boston, MA 02110-1301, USA.                                              --
  21 --                                                                          --
  22 -- GNAT was originally developed  by the GNAT team at  New York University. --
  23 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  24 --                                                                          --
  25 ------------------------------------------------------------------------------
  26
  27 with Xr_Tabls; use Xr_Tabls;
  28 with Xref_Lib; use Xref_Lib;
  29 with Osint;    use Osint;
  30 with Types;    use Types;
  31
  32 with Gnatvsn;
  33 with Opt;
  34
  35 with Ada.Strings.Fixed; use Ada.Strings.Fixed;
  36 with Ada.Text_IO;       use Ada.Text_IO;
  37 with GNAT.Command_Line; use GNAT.Command_Line;
  38 with GNAT.Strings;      use GNAT.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 Write_Usage;
  59    --  Print a small help page for program usage
  60
  61    --------------------
  62    -- Parse_Cmd_Line --
  63    --------------------
  64
  65    procedure Parse_Cmd_Line is
  66    begin
  67       loop
  68          case
  69            GNAT.Command_Line.Getopt
  70              ("a aI: aO: d f g h I: nostdinc nostdlib p: u v -RTS=")
  71          is
  72             when ASCII.NUL =>
  73                exit;
  74
  75             when 'a' =>
  76                if GNAT.Command_Line.Full_Switch = "a" then
  77                   Read_Only := True;
  78
  79                elsif GNAT.Command_Line.Full_Switch = "aI" then
  80                   Osint.Add_Src_Search_Dir (GNAT.Command_Line.Parameter);
  81
  82                else
  83                   Osint.Add_Lib_Search_Dir (GNAT.Command_Line.Parameter);
  84                end if;
  85
  86             when 'd' =>
  87                Der_Info := True;
  88
  89             when 'f' =>
  90                Full_Path_Name := True;
  91
  92             when 'g' =>
  93                Local_Symbols := False;
  94
  95             when 'h' =>
  96                Write_Usage;
  97
  98             when 'I' =>
  99                Osint.Add_Src_Search_Dir (GNAT.Command_Line.Parameter);
 100                Osint.Add_Lib_Search_Dir (GNAT.Command_Line.Parameter);
 101
 102             when 'n' =>
 103                if GNAT.Command_Line.Full_Switch = "nostdinc" then
 104                   Opt.No_Stdinc := True;
 105                elsif GNAT.Command_Line.Full_Switch = "nostlib" then
 106                   Opt.No_Stdlib := True;
 107                end if;
 108
 109             when 'p' =>
 110                declare
 111                   S : constant String := GNAT.Command_Line.Parameter;
 112                begin
 113                   Prj_File_Length := S'Length;
 114                   Prj_File (1 .. Prj_File_Length) := S;
 115                end;
 116
 117             when 'u' =>
 118                Search_Unused := True;
 119                Vi_Mode := False;
 120
 121             when 'v' =>
 122                Vi_Mode := True;
 123                Search_Unused := False;
 124
 125             --  The only switch starting with -- recognized is --RTS
 126
 127             when '-' =>
 128
 129                --  Check that it is the first time we see this switch
 130
 131                if RTS_Specified = null then
 132                   RTS_Specified := new String'(GNAT.Command_Line.Parameter);
 133
 134                elsif RTS_Specified.all /= GNAT.Command_Line.Parameter then
 135                   Osint.Fail ("--RTS cannot be specified multiple times");
 136                end if;
 137
 138                Opt.No_Stdinc  := True;
 139                Opt.RTS_Switch := True;
 140
 141                declare
 142                   Src_Path_Name : constant String_Ptr :=
 143                                     Get_RTS_Search_Dir
 144                                       (GNAT.Command_Line.Parameter, Include);
 145
 146                   Lib_Path_Name : constant String_Ptr :=
 147                                     Get_RTS_Search_Dir
 148                                       (GNAT.Command_Line.Parameter, Objects);
 149
 150                begin
 151                   if Src_Path_Name /= null and then Lib_Path_Name /= null then
 152                      Add_Search_Dirs (Src_Path_Name, Include);
 153                      Add_Search_Dirs (Lib_Path_Name, Objects);
 154
 155                   elsif Src_Path_Name = null and then Lib_Path_Name = null then
 156                      Osint.Fail ("RTS path not valid: missing " &
 157                                  "adainclude and adalib directories");
 158
 159                   elsif Src_Path_Name = null then
 160                      Osint.Fail ("RTS path not valid: missing " &
 161                                  "adainclude directory");
 162
 163                   elsif  Lib_Path_Name = null then
 164                      Osint.Fail ("RTS path not valid: missing " &
 165                                  "adalib directory");
 166                   end if;
 167                end;
 168
 169             when others =>
 170                Write_Usage;
 171          end case;
 172       end loop;
 173
 174       --  Get the other arguments
 175
 176       loop
 177          declare
 178             S : constant String := GNAT.Command_Line.Get_Argument;
 179
 180          begin
 181             exit when S'Length = 0;
 182
 183             if Ada.Strings.Fixed.Index (S, ":") /= 0 then
 184                Ada.Text_IO.Put_Line
 185                  ("Only file names are allowed on the command line");
 186                Write_Usage;
 187             end if;
 188
 189             Add_Xref_File (S);
 190             Have_File := True;
 191          end;
 192       end loop;
 193
 194    exception
 195       when GNAT.Command_Line.Invalid_Switch =>
 196          Ada.Text_IO.Put_Line ("Invalid switch : "
 197                                & GNAT.Command_Line.Full_Switch);
 198          Write_Usage;
 199
 200       when GNAT.Command_Line.Invalid_Parameter =>
 201          Ada.Text_IO.Put_Line ("Parameter missing for : "
 202                                & GNAT.Command_Line.Full_Switch);
 203          Write_Usage;
 204    end Parse_Cmd_Line;
 205
 206    -----------------
 207    -- Write_Usage --
 208    -----------------
 209
 210    procedure Write_Usage is
 211    begin
 212       Put_Line ("GNATXREF " & Gnatvsn.Gnat_Version_String);
 213       Put_Line ("Copyright 1998-2005, AdaCore");
 214       Put_Line ("Usage: gnatxref [switches] file1 file2 ...");
 215       New_Line;
 216       Put_Line ("  file ... list of source files to xref, " &
 217                 "including with'ed units");
 218       New_Line;
 219       Put_Line ("gnatxref switches:");
 220       Put_Line ("   -a        Consider all files, even when the ali file is"
 221                 & " readonly");
 222       Put_Line ("   -aIdir    Specify source files search path");
 223       Put_Line ("   -aOdir    Specify library/object files search path");
 224       Put_Line ("   -d        Output derived type information");
 225       Put_Line ("   -f        Output full path name");
 226       Put_Line ("   -g        Output information only for global symbols");
 227       Put_Line ("   -Idir     Like -aIdir -aOdir");
 228       Put_Line ("   -nostdinc Don't look for sources in the system default"
 229                 & " directory");
 230       Put_Line ("   -nostdlib Don't look for library files in the system"
 231                 & " default directory");
 232       Put_Line ("   --RTS=dir specify the default source and object search"
 233                 & " path");
 234       Put_Line ("   -p file   Use file as the default project file");
 235       Put_Line ("   -u        List unused entities");
 236       Put_Line ("   -v        Print a 'tags' file for vi");
 237       New_Line;
 238
 239       raise Usage_Error;
 240    end Write_Usage;
 241
 242 begin
 243    Parse_Cmd_Line;
 244
 245    if not Have_File then
 246       Write_Usage;
 247    end if;
 248
 249    Xr_Tabls.Set_Default_Match (True);
 250
 251    --  Find the project file
 252
 253    if Prj_File_Length = 0 then
 254       Xr_Tabls.Create_Project_File
 255         (Default_Project_File (Osint.To_Host_Dir_Spec (".", False).all));
 256    else
 257       Xr_Tabls.Create_Project_File (Prj_File (1 .. Prj_File_Length));
 258    end if;
 259
 260    --  Fill up the table
 261
 262    Search_Xref (Local_Symbols, Read_Only, Der_Info);
 263
 264    if Search_Unused then
 265       Print_Unused (Full_Path_Name);
 266    elsif Vi_Mode then
 267       Print_Vi (Full_Path_Name);
 268    else
 269       Print_Xref (Full_Path_Name);
 270    end if;
 271
 272 exception
 273    when Usage_Error =>
 274       null;
 275 end Gnatxref;