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------------------------------------------------------------------------------ -- -- -- GNAT COMPILER COMPONENTS -- -- -- -- P R E P -- -- -- -- S p e c -- -- -- -- Copyright (C) 2002-2008, 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 3, 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 COPYING3. If not, go to -- -- http://www.gnu.org/licenses for a complete copy of the license. -- -- -- -- GNAT was originally developed by the GNAT team at New York University. -- -- Extensive contributions were provided by Ada Core Technologies Inc. -- -- -- ------------------------------------------------------------------------------ with GNAT.Dynamic_Tables; with Namet; use Namet; with Types; use Types; package Prep is ----------------- -- Symbol Data -- ----------------- type Symbol_Data is record Symbol : Name_Id := No_Name; -- The symbol in lower case Original : Name_Id := No_Name; -- The symbol as originally given in the definition file or on -- the command line. On_The_Command_Line : Boolean := False; -- Set to True if symbol is defined on the command line. -- Used to prevent replacement of command line symbols by definition -- file symbols. Is_A_String : Boolean := False; -- Indicate if the value of the symbol has been specified as a string -- or simply as a sequence of characters. Value : String_Id := No_String; -- The value of the symbol (string or sequence of characters) end record; True_Value : Symbol_Data := (Symbol => No_Name, Original => No_Name, On_The_Command_Line => False, Is_A_String => False, Value => No_String); type Symbol_Id is new Nat; No_Symbol : constant Symbol_Id := 0; package Symbol_Table is new GNAT.Dynamic_Tables (Table_Component_Type => Symbol_Data, Table_Index_Type => Symbol_Id, Table_Low_Bound => 1, Table_Initial => 10, Table_Increment => 100); -- The table of all symbols Mapping : Symbol_Table.Instance; -- The mapping table of symbols to values used by procedure Parse_Def_File -- and Preprocess. function Index_Of (Symbol : Name_Id) return Symbol_Id; -- Return the index in the Mapping table of Symbol. -- Return No_Symbol if Symbol in not in the Mapping table. -- Access to procedure types used by procedure Initialize below: type Error_Msg_Proc is access procedure (Msg : String; Flag_Location : Source_Ptr); type Scan_Proc is access procedure; type Set_Ignore_Errors_Proc is access procedure (To : Boolean); type Put_Char_Proc is access procedure (C : Character); type New_EOL_Proc is access procedure; procedure Initialize; -- Initialize the preprocessor's global structures procedure Setup_Hooks (Error_Msg : Error_Msg_Proc; Scan : Scan_Proc; Set_Ignore_Errors : Set_Ignore_Errors_Proc; Put_Char : Put_Char_Proc; New_EOL : New_EOL_Proc); -- Set the i/o hooks used by the preprocessor procedure Parse_Def_File; -- Parse the definition file. The definition file must have already been -- loaded and the scanner initialized. procedure Preprocess (Source_Modified : out Boolean); -- Preprocess the input file. The input file must have already been loaded -- and the scanner initialized. Source_Modified is set to True iff the -- preprocessor modified the source text. procedure Check_Command_Line_Symbol_Definition (Definition : String; Data : out Symbol_Data); -- Check the validity of a command line definition <symbol>=<value>. -- Return the symbol and its value in Data if the definition is valid, -- fail if it is not valid. procedure Change_Reserved_Keyword_To_Symbol (All_Keywords : Boolean := False); -- If Token is an Ada reserved word (other than IF, ELSIF, ELSE, -- END, AND, OR, THEN when All_Keywords is False), change it to -- Tok_Identifier with the corresponding Token_Name. procedure List_Symbols (Foreword : String); -- List the symbols used for preprocessing a file, with their values. -- If Foreword is not empty, Output Foreword before the list. end Prep;
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