291 lines
8.9 KiB
Ada
291 lines
8.9 KiB
Ada
------------------------------------------------------------------------------
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-- --
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-- GNAT COMPILER COMPONENTS --
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-- --
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-- P R J . E X T --
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-- --
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-- B o d y --
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-- --
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-- Copyright (C) 2000-2016, Free Software Foundation, Inc. --
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-- --
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-- GNAT is free software; you can redistribute it and/or modify it under --
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-- terms of the GNU General Public License as published by the Free Soft- --
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-- ware Foundation; either version 3, or (at your option) any later ver- --
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-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
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-- for more details. You should have received a copy of the GNU General --
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-- Public License distributed with GNAT; see file COPYING3. If not, go to --
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-- http://www.gnu.org/licenses for a complete copy of the license. --
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-- --
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-- GNAT was originally developed by the GNAT team at New York University. --
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-- Extensive contributions were provided by Ada Core Technologies Inc. --
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-- --
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------------------------------------------------------------------------------
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with Osint; use Osint;
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with Ada.Unchecked_Deallocation;
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package body Prj.Ext is
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----------------
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-- Initialize --
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----------------
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procedure Initialize
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(Self : out External_References;
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Copy_From : External_References := No_External_Refs)
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is
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N : Name_To_Name_Ptr;
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N2 : Name_To_Name_Ptr;
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begin
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if Self.Refs = null then
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Self.Refs := new Name_To_Name_HTable.Instance;
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if Copy_From.Refs /= null then
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N := Name_To_Name_HTable.Get_First (Copy_From.Refs.all);
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while N /= null loop
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N2 := new Name_To_Name'
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(Key => N.Key,
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Value => N.Value,
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Source => N.Source,
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Next => null);
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Name_To_Name_HTable.Set (Self.Refs.all, N2);
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N := Name_To_Name_HTable.Get_Next (Copy_From.Refs.all);
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end loop;
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end if;
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end if;
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end Initialize;
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---------
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-- Add --
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---------
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procedure Add
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(Self : External_References;
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External_Name : String;
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Value : String;
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Source : External_Source := External_Source'First;
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Silent : Boolean := False)
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is
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Key : Name_Id;
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N : Name_To_Name_Ptr;
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begin
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-- For external attribute, set the environment variable
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if Source = From_External_Attribute and then External_Name /= "" then
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declare
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Env_Var : String_Access := Getenv (External_Name);
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begin
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if Env_Var = null or else Env_Var.all = "" then
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Setenv (Name => External_Name, Value => Value);
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if not Silent then
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Debug_Output
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("Environment variable """ & External_Name
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& """ = """ & Value & '"');
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end if;
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elsif not Silent then
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Debug_Output
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("Not overriding existing environment variable """
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& External_Name & """, value is """ & Env_Var.all & '"');
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end if;
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Free (Env_Var);
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end;
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end if;
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Name_Len := External_Name'Length;
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Name_Buffer (1 .. Name_Len) := External_Name;
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Canonical_Case_Env_Var_Name (Name_Buffer (1 .. Name_Len));
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Key := Name_Find;
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-- Check whether the value is already defined, to properly respect the
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-- overriding order.
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if Source /= External_Source'First then
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N := Name_To_Name_HTable.Get (Self.Refs.all, Key);
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if N /= null then
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if External_Source'Pos (N.Source) <
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External_Source'Pos (Source)
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then
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if not Silent then
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Debug_Output
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("Not overriding existing external reference '"
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& External_Name & "', value was defined in "
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& N.Source'Img);
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end if;
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return;
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end if;
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end if;
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end if;
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Name_Len := Value'Length;
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Name_Buffer (1 .. Name_Len) := Value;
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N := new Name_To_Name'
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(Key => Key,
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Source => Source,
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Value => Name_Find,
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Next => null);
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if not Silent then
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Debug_Output ("Add external (" & External_Name & ") is", N.Value);
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end if;
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Name_To_Name_HTable.Set (Self.Refs.all, N);
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end Add;
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-----------
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-- Check --
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-----------
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function Check
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(Self : External_References;
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Declaration : String) return Boolean
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is
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begin
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for Equal_Pos in Declaration'Range loop
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if Declaration (Equal_Pos) = '=' then
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exit when Equal_Pos = Declaration'First;
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Add
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(Self => Self,
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External_Name =>
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Declaration (Declaration'First .. Equal_Pos - 1),
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Value =>
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Declaration (Equal_Pos + 1 .. Declaration'Last),
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Source => From_Command_Line);
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return True;
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end if;
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end loop;
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return False;
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end Check;
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-----------
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-- Reset --
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-----------
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procedure Reset (Self : External_References) is
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begin
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if Self.Refs /= null then
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Debug_Output ("Reset external references");
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Name_To_Name_HTable.Reset (Self.Refs.all);
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end if;
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end Reset;
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--------------
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-- Value_Of --
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--------------
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function Value_Of
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(Self : External_References;
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External_Name : Name_Id;
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With_Default : Name_Id := No_Name)
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return Name_Id
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is
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Value : Name_To_Name_Ptr;
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Val : Name_Id;
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Name : String := Get_Name_String (External_Name);
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begin
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Canonical_Case_Env_Var_Name (Name);
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if Self.Refs /= null then
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Name_Len := Name'Length;
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Name_Buffer (1 .. Name_Len) := Name;
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Value := Name_To_Name_HTable.Get (Self.Refs.all, Name_Find);
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if Value /= null then
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Debug_Output ("Value_Of (" & Name & ") is in cache", Value.Value);
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return Value.Value;
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end if;
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end if;
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-- Find if it is an environment, if it is, put value in the hash table
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declare
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Env_Value : String_Access := Getenv (Name);
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begin
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if Env_Value /= null and then Env_Value'Length > 0 then
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Name_Len := Env_Value'Length;
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Name_Buffer (1 .. Name_Len) := Env_Value.all;
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Val := Name_Find;
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if Current_Verbosity = High then
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Debug_Output ("Value_Of (" & Name & ") is", Val);
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end if;
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if Self.Refs /= null then
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Value := new Name_To_Name'
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(Key => External_Name,
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Value => Val,
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Source => From_Environment,
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Next => null);
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Name_To_Name_HTable.Set (Self.Refs.all, Value);
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end if;
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Free (Env_Value);
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return Val;
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else
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if Current_Verbosity = High then
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Debug_Output
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("Value_Of (" & Name & ") is default", With_Default);
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end if;
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Free (Env_Value);
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return With_Default;
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end if;
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end;
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end Value_Of;
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----------
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-- Free --
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----------
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procedure Free (Self : in out External_References) is
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procedure Unchecked_Free is new Ada.Unchecked_Deallocation
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(Name_To_Name_HTable.Instance, Instance_Access);
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begin
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if Self.Refs /= null then
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Reset (Self);
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Unchecked_Free (Self.Refs);
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end if;
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end Free;
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--------------
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-- Set_Next --
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--------------
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procedure Set_Next (E : Name_To_Name_Ptr; Next : Name_To_Name_Ptr) is
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begin
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E.Next := Next;
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end Set_Next;
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----------
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-- Next --
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----------
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function Next (E : Name_To_Name_Ptr) return Name_To_Name_Ptr is
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begin
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return E.Next;
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end Next;
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-------------
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-- Get_Key --
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-------------
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function Get_Key (E : Name_To_Name_Ptr) return Name_Id is
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begin
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return E.Key;
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end Get_Key;
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end Prj.Ext;
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