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-- VHDL libraries handling.
-- Copyright (C) 2002, 2003, 2004, 2005 Tristan Gingold
--
-- GHDL is free software; you can redistribute it and/or modify it under
-- the terms of the GNU General Public License as published by the Free
-- Software Foundation; either version 2, or (at your option) any later
-- version.
--
-- GHDL is distributed in the hope that it will be useful, but WITHOUT 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
-- along with GHDL; see the file COPYING. If not, write to the Free
-- Software Foundation, 59 Temple Place - Suite 330, Boston, MA
-- 02111-1307, USA.
with Types; use Types;
with Vhdl.Nodes; use Vhdl.Nodes;
with Std_Names;
package Libraries is
-- This package defines the library manager.
-- The purpose of the library manager is to associate library logical names
-- with host-dependent library.
--
-- In this implementation a host-dependent library is a file, whose name
-- is logical name of the library with the extension '.cf'. This file
-- contains the name and the position (filename, line, column and offset)
-- of all library unit of the library.
--
-- The working library WORK can be aliased with a ressource library,
-- they share the same host-dependenet library whose name is the name
-- of the ressource library. This is done by load_work_library.
-- Location for a command line.
Command_Line_Location : Location_Type;
-- A location for library declarations (such as library WORK).
Library_Location: Location_Type;
-- Library declaration for the std library.
-- This is also the first library of the libraries chain.
Std_Library : Iir_Library_Declaration := Null_Iir;
-- Library declaration for the work library.
-- Note: the identifier of the work_library is work_library_name, which
-- may be different from 'WORK'.
Work_Library: Iir_Library_Declaration;
-- Name of the WORK library.
Work_Library_Name : Name_Id := Std_Names.Name_Work;
-- Directory of the work library.
-- Set by default by INIT_PATHS to the local directory.
Work_Directory : Name_Id;
-- Local (current) directory.
Local_Directory : Name_Id;
-- Correspond to "" (empty identifier). Used to denote current directory
-- for library directories.
Name_Nil : Name_Id;
-- Chain of obsoleted design units.
Obsoleted_Design_Units : Iir := Null_Iir;
-- Initialize library paths table.
-- Set the local path.
procedure Init_Paths;
-- Add PATH in the search path.
procedure Add_Library_Path (Path : String);
-- Get the number of path in the search paths.
function Get_Nbr_Paths return Natural;
-- Get path N.
function Get_Path (N : Natural) return Name_Id;
-- Set PATH as the path of the work library.
procedure Set_Work_Library_Path (Path : String);
-- Transform a library identifier into a file name.
-- Very simple mechanism: just add '-objVV.cf' extension, where VV
-- is the version.
function Library_To_File_Name (Library: Iir_Library_Declaration)
return String;
-- Set the name of the work library, load the work library.
-- Note: the scanner shouldn't be in use, since this function uses it.
-- If EMPTY is set, the work library is just created and not loaded.
procedure Load_Work_Library (Empty : Boolean := False);
-- Initialize the library manager and load the STD library.
-- If BUILD_STANDARD is false, the std.standard library is not created.
-- Return TRUE in case of success, FALSE in case of failure.
function Load_Std_Library (Build_Standard : Boolean := True) return Boolean;
-- Save the work library as a host-dependent library.
procedure Save_Work_Library;
-- Remove the same file as DESIGN_FILE from work library and all of its
-- units.
procedure Purge_Design_File (Design_File : Iir_Design_File);
-- Just return the design_unit for NAME, or NULL if not found.
function Find_Primary_Unit
(Library: Iir_Library_Declaration; Name: Name_Id) return Iir_Design_Unit;
-- Get the library named IDENT. Return Null_Iir if it doesn't exist.
function Get_Library_No_Create (Ident : Name_Id)
return Iir_Library_Declaration;
-- Get or create a library from an identifier.
-- LOC is used only to report errors.
function Get_Library (Ident : Name_Id; Loc : Location_Type)
return Iir_Library_Declaration;
-- Add or replace an design unit in the work library.
-- DECL must not have a chain (because it may be modified).
--
-- If the design_file of UNIT is not already in the library, a new one
-- is created.
--
-- Units are always appended to the design_file. Therefore, the order is
-- kept.
--
-- If KEEP_OBSOLETE is True, obsoleted units are kept in the library.
-- This is used when a whole design file has to be added in the library and
-- then processed (without that feature, redefined units would disappear).
procedure Add_Design_Unit_Into_Library
(Unit : in Iir_Design_Unit; Keep_Obsolete : Boolean := False);
-- Put all design_units of FILE into the work library, by calling
-- Add_Design_Unit_Into_Library.
-- FILE is updated since it may changed (FILE is never put in the library,
-- a new one is created).
procedure Add_Design_File_Into_Library (File : in out Iir_Design_File);
-- Return the latest architecture analysed for entity ENTITY.
function Get_Latest_Architecture (Entity: Iir_Entity_Declaration)
return Iir_Architecture_Body;
-- Return the design unit (stubed if not loaded) from UNIT.
-- UNIT may be either a design unit, in this case UNIT is returned,
-- or a selected name, in this case the prefix is a library name and
-- the suffix a primary design unit name,
-- or an entity_aspect_entity to designate an architectrure.
-- Return null_iir if the design unit is not found.
function Find_Design_Unit (Unit : Iir) return Iir_Design_Unit;
-- Find the secondary unit of PRIMARY.
-- If PRIMARY is a package declaration, returns the package body,
-- If PRIMARY is an entity declaration, returns the architecture NAME.
-- Return NULL_IIR if not found.
function Find_Secondary_Unit (Primary: Iir_Design_Unit; Name: Name_Id)
return Iir_Design_Unit;
-- Search design file NAME in library LIB. This is not very efficient as
-- this is a simple linear search. NAME must correspond exactely to the
-- design file name.
function Find_Design_File (Lib : Iir_Library_Declaration; Name : Name_Id)
return Iir;
-- Find an entity whose name is NAME in any library.
-- If there is no such entity, return NULL_IIR.
-- If there are severals entities, return NULL_IIR;
function Find_Entity_For_Component (Name: Name_Id) return Iir_Design_Unit;
-- Decode '--work=NAME' command line option and return the identifier
-- for the library.
-- To effectively use the library, assign Work_Library_Name and load the
-- library by calling Load_Work_Library.
-- Return Null_Identifier if NAME is not a valid name.
function Decode_Work_Option (Opt : String) return Name_Id;
-- Get the chain of libraries. Can be used only to read (it musn't be
-- modified).
function Get_Libraries_Chain return Iir_Library_Declaration;
end Libraries;
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