gcc/ada/prj-ext.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT COMPILER COMPONENTS                         --
   4 --                                                                          --
   5 --                              P R J . E X T                               --
   6 --                                                                          --
   7 --                                 B o d y                                  --
   8 --                                                                          --
   9 --          Copyright (C) 2000-2010, 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 Osint;    use Osint;
  27 with Prj.Tree; use Prj.Tree;
  28
  29 package body Prj.Ext is
  30
  31    ---------
  32    -- Add --
  33    ---------
  34
  35    procedure Add
  36      (Tree          : Prj.Tree.Project_Node_Tree_Ref;
  37       External_Name : String;
  38       Value         : String)
  39    is
  40       The_Key   : Name_Id;
  41       The_Value : Name_Id;
  42    begin
  43       Name_Len := Value'Length;
  44       Name_Buffer (1 .. Name_Len) := Value;
  45       The_Value := Name_Find;
  46       Name_Len := External_Name'Length;
  47       Name_Buffer (1 .. Name_Len) := External_Name;
  48       Canonical_Case_Env_Var_Name (Name_Buffer (1 .. Name_Len));
  49       The_Key := Name_Find;
  50       Name_To_Name_HTable.Set (Tree.External_References, The_Key, The_Value);
  51    end Add;
  52
  53    -----------
  54    -- Check --
  55    -----------
  56
  57    function Check
  58      (Tree        : Prj.Tree.Project_Node_Tree_Ref;
  59       Declaration : String) return Boolean
  60    is
  61    begin
  62       for Equal_Pos in Declaration'Range loop
  63          if Declaration (Equal_Pos) = '=' then
  64             exit when Equal_Pos = Declaration'First;
  65             Add
  66               (Tree          => Tree,
  67                External_Name =>
  68                  Declaration (Declaration'First .. Equal_Pos - 1),
  69                Value         =>
  70                  Declaration (Equal_Pos + 1 .. Declaration'Last));
  71             return True;
  72          end if;
  73       end loop;
  74
  75       return False;
  76    end Check;
  77
  78    -----------
  79    -- Reset --
  80    -----------
  81
  82    procedure Reset (Tree : Prj.Tree.Project_Node_Tree_Ref) is
  83    begin
  84       Name_To_Name_HTable.Reset (Tree.External_References);
  85    end Reset;
  86
  87    --------------
  88    -- Value_Of --
  89    --------------
  90
  91    function Value_Of
  92      (Tree          : Prj.Tree.Project_Node_Tree_Ref;
  93       External_Name : Name_Id;
  94       With_Default  : Name_Id := No_Name)
  95       return          Name_Id
  96    is
  97       The_Value : Name_Id;
  98       Name      : String := Get_Name_String (External_Name);
  99
 100    begin
 101       Canonical_Case_Env_Var_Name (Name);
 102       Name_Len := Name'Length;
 103       Name_Buffer (1 .. Name_Len) := Name;
 104       The_Value :=
 105         Name_To_Name_HTable.Get (Tree.External_References, Name_Find);
 106
 107       if The_Value /= No_Name then
 108          return The_Value;
 109       end if;
 110
 111       --  Find if it is an environment, if it is, put value in the hash table
 112
 113       declare
 114          Env_Value : String_Access := Getenv (Name);
 115
 116       begin
 117          if Env_Value /= null and then Env_Value'Length > 0 then
 118             Name_Len := Env_Value'Length;
 119             Name_Buffer (1 .. Name_Len) := Env_Value.all;
 120             The_Value := Name_Find;
 121             Name_To_Name_HTable.Set
 122               (Tree.External_References, External_Name, The_Value);
 123             Free (Env_Value);
 124             return The_Value;
 125
 126          else
 127             Free (Env_Value);
 128             return With_Default;
 129          end if;
 130       end;
 131    end Value_Of;
 132
 133 end Prj.Ext;