| ------------------------------------------------------------------------------ |
| -- -- |
| -- GNAT COMPILER COMPONENTS -- |
| -- -- |
| -- P R J . E X T -- |
| -- -- |
| -- B o d y -- |
| -- -- |
| -- Copyright (C) 2000-2003 Free Software Foundation, Inc. -- |
| -- -- |
| -- GNAT is free software; you can redistribute it and/or modify it under -- |
| -- terms of the GNU General Public License as published by the Free Soft- -- |
| -- ware Foundation; either version 2, or (at your option) any later ver- -- |
| -- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- |
| -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- |
| -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License -- |
| -- for more details. You should have received a copy of the GNU General -- |
| -- Public License distributed with GNAT; see file COPYING. If not, write -- |
| -- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, -- |
| -- MA 02111-1307, USA. -- |
| -- -- |
| -- GNAT was originally developed by the GNAT team at New York University. -- |
| -- Extensive contributions were provided by Ada Core Technologies Inc. -- |
| -- -- |
| ------------------------------------------------------------------------------ |
| |
| with Namet; use Namet; |
| with Osint; use Osint; |
| with Prj.Com; use Prj.Com; |
| with Types; use Types; |
| |
| with GNAT.HTable; |
| with GNAT.OS_Lib; use GNAT.OS_Lib; |
| |
| package body Prj.Ext is |
| |
| package Htable is new GNAT.HTable.Simple_HTable |
| (Header_Num => Header_Num, |
| Element => Name_Id, |
| No_Element => No_Name, |
| Key => Name_Id, |
| Hash => Hash, |
| Equal => "="); |
| -- External references are stored in this hash table, either by procedure |
| -- Add (directly or through a call to function Check) or by function |
| -- Value_Of when an environment variable is found non empty. Value_Of |
| -- first for external reference in this table, before checking the |
| -- environment. Htable is emptied (reset) by procedure Reset. |
| |
| --------- |
| -- Add -- |
| --------- |
| |
| procedure Add |
| (External_Name : String; |
| Value : String) |
| is |
| The_Key : Name_Id; |
| The_Value : Name_Id; |
| |
| begin |
| Name_Len := Value'Length; |
| Name_Buffer (1 .. Name_Len) := Value; |
| The_Value := Name_Find; |
| Name_Len := External_Name'Length; |
| Name_Buffer (1 .. Name_Len) := External_Name; |
| Canonical_Case_File_Name (Name_Buffer (1 .. Name_Len)); |
| The_Key := Name_Find; |
| Htable.Set (The_Key, The_Value); |
| end Add; |
| |
| ----------- |
| -- Check -- |
| ----------- |
| |
| function Check (Declaration : String) return Boolean is |
| begin |
| for Equal_Pos in Declaration'Range loop |
| if Declaration (Equal_Pos) = '=' then |
| exit when Equal_Pos = Declaration'First; |
| exit when Equal_Pos = Declaration'Last; |
| Add |
| (External_Name => |
| Declaration (Declaration'First .. Equal_Pos - 1), |
| Value => |
| Declaration (Equal_Pos + 1 .. Declaration'Last)); |
| return True; |
| end if; |
| end loop; |
| |
| return False; |
| end Check; |
| |
| ----------- |
| -- Reset -- |
| ----------- |
| |
| procedure Reset is |
| begin |
| Htable.Reset; |
| end Reset; |
| |
| -------------- |
| -- Value_Of -- |
| -------------- |
| |
| function Value_Of |
| (External_Name : Name_Id; |
| With_Default : Name_Id := No_Name) |
| return Name_Id |
| is |
| The_Value : Name_Id; |
| Name : String := Get_Name_String (External_Name); |
| |
| begin |
| Canonical_Case_File_Name (Name); |
| Name_Len := Name'Length; |
| Name_Buffer (1 .. Name_Len) := Name; |
| The_Value := Htable.Get (Name_Find); |
| |
| if The_Value /= No_Name then |
| return The_Value; |
| end if; |
| |
| -- Find if it is an environment. |
| -- If it is, put the value in the hash table. |
| |
| declare |
| Env_Value : String_Access := Getenv (Name); |
| |
| begin |
| if Env_Value /= null and then Env_Value'Length > 0 then |
| Name_Len := Env_Value'Length; |
| Name_Buffer (1 .. Name_Len) := Env_Value.all; |
| The_Value := Name_Find; |
| Htable.Set (External_Name, The_Value); |
| Free (Env_Value); |
| return The_Value; |
| |
| else |
| Free (Env_Value); |
| return With_Default; |
| end if; |
| end; |
| end Value_Of; |
| |
| end Prj.Ext; |
