gcc/ada/sinput-p.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT COMPILER COMPONENTS                         --
   4 --                                                                          --
   5 --                             S I N P U T . P                              --
   6 --                                                                          --
   7 --                                 B o d y                                  --
   8 --                                                                          --
   9 --          Copyright (C) 1992-2007, 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 Prj.Err;
  27 with Sinput.C;
  28
  29 package body Sinput.P is
  30
  31    First : Boolean := True;
  32    --  Flag used when Load_Project_File is called the first time,
  33    --  to set Main_Source_File.
  34    --  The flag is reset to False at the first call to Load_Project_File.
  35    --  Calling Reset_First sets it back to True.
  36
  37    -----------------------
  38    -- Load_Project_File --
  39    -----------------------
  40
  41    function Load_Project_File (Path : String) return Source_File_Index is
  42       X    : Source_File_Index;
  43
  44    begin
  45       X := Sinput.C.Load_File (Path);
  46
  47       if First then
  48          Main_Source_File := X;
  49          First := False;
  50       end if;
  51
  52       return X;
  53    end Load_Project_File;
  54
  55    -----------------
  56    -- Reset_First --
  57    -----------------
  58
  59    procedure Reset_First is
  60    begin
  61       First := True;
  62    end Reset_First;
  63
  64    --------------------------------
  65    -- Restore_Project_Scan_State --
  66    --------------------------------
  67
  68    procedure Restore_Project_Scan_State
  69      (Saved_State : Saved_Project_Scan_State)
  70    is
  71    begin
  72       Restore_Scan_State (Saved_State.Scan_State);
  73       Source              := Saved_State.Source;
  74       Current_Source_File := Saved_State.Current_Source_File;
  75    end Restore_Project_Scan_State;
  76
  77    -----------------------------
  78    -- Save_Project_Scan_State --
  79    -----------------------------
  80
  81    procedure Save_Project_Scan_State
  82      (Saved_State : out Saved_Project_Scan_State)
  83    is
  84    begin
  85       Save_Scan_State (Saved_State.Scan_State);
  86       Saved_State.Source              := Source;
  87       Saved_State.Current_Source_File := Current_Source_File;
  88    end Save_Project_Scan_State;
  89
  90    ----------------------------
  91    -- Source_File_Is_Subunit --
  92    ----------------------------
  93
  94    function Source_File_Is_Subunit (X : Source_File_Index) return Boolean is
  95    begin
  96       Prj.Err.Scanner.Initialize_Scanner (X);
  97
  98       --  We scan past junk to the first interesting compilation unit
  99       --  token, to see if it is SEPARATE. We ignore WITH keywords during
 100       --  this and also PRIVATE. The reason for ignoring PRIVATE is that
 101       --  it handles some error situations, and also to handle PRIVATE WITH
 102       --  in Ada 2005 mode.
 103
 104       while Token = Tok_With
 105         or else Token = Tok_Private
 106         or else (Token not in Token_Class_Cunit and then Token /= Tok_EOF)
 107       loop
 108          Prj.Err.Scanner.Scan;
 109       end loop;
 110
 111       return Token = Tok_Separate;
 112    end Source_File_Is_Subunit;
 113
 114 end Sinput.P;