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) 1998-2008, 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 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
  70       procedure Check_Version_And_Help is new Check_Version_And_Help_G (Usage);
  71
  72       --  Start of processing for Parse_Cmd_Line
  73
  74    begin
  75       --  First check for --version or --help
  76
  77       Check_Version_And_Help ("GNATXREF", "1998");
  78
  79       loop
  80          case
  81            GNAT.Command_Line.Getopt
  82              ("a aI: aO: d f g h I: nostdinc nostdlib p: u v -RTS=")
  83          is
  84             when ASCII.NUL =>
  85                exit;
  86
  87             when 'a' =>
  88                if GNAT.Command_Line.Full_Switch = "a" then
  89                   Read_Only := True;
  90
  91                elsif GNAT.Command_Line.Full_Switch = "aI" then
  92                   Osint.Add_Src_Search_Dir (GNAT.Command_Line.Parameter);
  93
  94                else
  95                   Osint.Add_Lib_Search_Dir (GNAT.Command_Line.Parameter);
  96                end if;
  97
  98             when 'd' =>
  99                Der_Info := True;
 100
 101             when 'f' =>
 102                Full_Path_Name := True;
 103
 104             when 'g' =>
 105                Local_Symbols := False;
 106
 107             when 'h' =>
 108                Write_Usage;
 109
 110             when 'I' =>
 111                Osint.Add_Src_Search_Dir (GNAT.Command_Line.Parameter);
 112                Osint.Add_Lib_Search_Dir (GNAT.Command_Line.Parameter);
 113
 114             when 'n' =>
 115                if GNAT.Command_Line.Full_Switch = "nostdinc" then
 116                   Opt.No_Stdinc := True;
 117                elsif GNAT.Command_Line.Full_Switch = "nostdlib" then
 118                   Opt.No_Stdlib := True;
 119                end if;
 120
 121             when 'p' =>
 122                declare
 123                   S : constant String := GNAT.Command_Line.Parameter;
 124                begin
 125                   Prj_File_Length := S'Length;
 126                   Prj_File (1 .. Prj_File_Length) := S;
 127                end;
 128
 129             when 'u' =>
 130                Search_Unused := True;
 131                Vi_Mode := False;
 132
 133             when 'v' =>
 134                Vi_Mode := True;
 135                Search_Unused := False;
 136
 137             --  The only switch starting with -- recognized is --RTS
 138
 139             when '-' =>
 140
 141                --  Check that it is the first time we see this switch
 142
 143                if RTS_Specified = null then
 144                   RTS_Specified := new String'(GNAT.Command_Line.Parameter);
 145
 146                elsif RTS_Specified.all /= GNAT.Command_Line.Parameter then
 147                   Osint.Fail ("--RTS cannot be specified multiple times");
 148                end if;
 149
 150                Opt.No_Stdinc  := True;
 151                Opt.RTS_Switch := True;
 152
 153                declare
 154                   Src_Path_Name : constant String_Ptr :=
 155                                     Get_RTS_Search_Dir
 156                                       (GNAT.Command_Line.Parameter, Include);
 157
 158                   Lib_Path_Name : constant String_Ptr :=
 159                                     Get_RTS_Search_Dir
 160                                       (GNAT.Command_Line.Parameter, Objects);
 161
 162                begin
 163                   if Src_Path_Name /= null and then Lib_Path_Name /= null then
 164                      Add_Search_Dirs (Src_Path_Name, Include);
 165                      Add_Search_Dirs (Lib_Path_Name, Objects);
 166
 167                   elsif Src_Path_Name = null and then Lib_Path_Name = null then
 168                      Osint.Fail ("RTS path not valid: missing " &
 169                                  "adainclude and adalib directories");
 170
 171                   elsif Src_Path_Name = null then
 172                      Osint.Fail ("RTS path not valid: missing " &
 173                                  "adainclude directory");
 174
 175                   elsif  Lib_Path_Name = null then
 176                      Osint.Fail ("RTS path not valid: missing " &
 177                                  "adalib directory");
 178                   end if;
 179                end;
 180
 181             when others =>
 182                Write_Usage;
 183          end case;
 184       end loop;
 185
 186       --  Get the other arguments
 187
 188       loop
 189          declare
 190             S : constant String := GNAT.Command_Line.Get_Argument;
 191
 192          begin
 193             exit when S'Length = 0;
 194
 195             if Ada.Strings.Fixed.Index (S, ":") /= 0 then
 196                Ada.Text_IO.Put_Line
 197                  ("Only file names are allowed on the command line");
 198                Write_Usage;
 199             end if;
 200
 201             Add_Xref_File (S);
 202             Have_File := True;
 203          end;
 204       end loop;
 205
 206    exception
 207       when GNAT.Command_Line.Invalid_Switch =>
 208          Ada.Text_IO.Put_Line ("Invalid switch : "
 209                                & GNAT.Command_Line.Full_Switch);
 210          Write_Usage;
 211
 212       when GNAT.Command_Line.Invalid_Parameter =>
 213          Ada.Text_IO.Put_Line ("Parameter missing for : "
 214                                & GNAT.Command_Line.Full_Switch);
 215          Write_Usage;
 216    end Parse_Cmd_Line;
 217
 218    -----------
 219    -- Usage --
 220    -----------
 221
 222    procedure Usage is
 223    begin
 224       Put_Line ("Usage: gnatxref [switches] file1 file2 ...");
 225       New_Line;
 226       Put_Line ("  file ... list of source files to xref, " &
 227                 "including with'ed units");
 228       New_Line;
 229       Put_Line ("gnatxref switches:");
 230       Put_Line ("   -a        Consider all files, even when the ali file is"
 231                 & " readonly");
 232       Put_Line ("   -aIdir    Specify source files search path");
 233       Put_Line ("   -aOdir    Specify library/object files search path");
 234       Put_Line ("   -d        Output derived type information");
 235       Put_Line ("   -f        Output full path name");
 236       Put_Line ("   -g        Output information only for global symbols");
 237       Put_Line ("   -Idir     Like -aIdir -aOdir");
 238       Put_Line ("   -nostdinc Don't look for sources in the system default"
 239                 & " directory");
 240       Put_Line ("   -nostdlib Don't look for library files in the system"
 241                 & " default directory");
 242       Put_Line ("   --RTS=dir specify the default source and object search"
 243                 & " path");
 244       Put_Line ("   -p file   Use file as the default project file");
 245       Put_Line ("   -u        List unused entities");
 246       Put_Line ("   -v        Print a 'tags' file for vi");
 247       New_Line;
 248
 249    end Usage;
 250
 251    -----------------
 252    -- Write_Usage --
 253    -----------------
 254
 255    procedure Write_Usage is
 256    begin
 257       Display_Version ("GNATXREF", "1998");
 258       New_Line;
 259       Usage;
 260       raise Usage_Error;
 261    end Write_Usage;
 262
 263 begin
 264    Parse_Cmd_Line;
 265
 266    if not Have_File then
 267       Write_Usage;
 268    end if;
 269
 270    Xr_Tabls.Set_Default_Match (True);
 271
 272    --  Find the project file
 273
 274    if Prj_File_Length = 0 then
 275       Xr_Tabls.Create_Project_File
 276         (Default_Project_File (Osint.To_Host_Dir_Spec (".", False).all));
 277    else
 278       Xr_Tabls.Create_Project_File (Prj_File (1 .. Prj_File_Length));
 279    end if;
 280
 281    --  Fill up the table
 282
 283    Search_Xref (Local_Symbols, Read_Only, Der_Info);
 284
 285    if Search_Unused then
 286       Print_Unused (Full_Path_Name);
 287    elsif Vi_Mode then
 288       Print_Vi (Full_Path_Name);
 289    else
 290       Print_Xref (Full_Path_Name);
 291    end if;
 292
 293 exception
 294    when Usage_Error =>
 295       null;
 296 end Gnatxref;