136 lines
5.5 KiB
Ada
136 lines
5.5 KiB
Ada
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------------------------------------------------------------------------------
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-- --
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-- GNAT COMPILER COMPONENTS --
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-- --
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-- P R E P --
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-- --
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-- S p e c --
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-- --
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-- Copyright (C) 2002-2020, 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 GNAT.Dynamic_Tables;
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with Namet; use Namet;
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with Types; use Types;
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package Prep is
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-----------------
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-- Symbol Data --
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-----------------
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type Symbol_Data is record
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Symbol : Name_Id := No_Name;
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-- The symbol in lower case
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Original : Name_Id := No_Name;
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-- The symbol as originally given in the definition file or on
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-- the command line.
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On_The_Command_Line : Boolean := False;
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-- Set to True if symbol is defined on the command line.
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-- Used to prevent replacement of command line symbols by definition
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-- file symbols.
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Is_A_String : Boolean := False;
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-- Indicate if the value of the symbol has been specified as a string
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-- or simply as a sequence of characters.
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Value : String_Id := No_String;
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-- The value of the symbol (string or sequence of characters)
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end record;
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True_Value : Symbol_Data :=
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(Symbol => No_Name,
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Original => No_Name,
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On_The_Command_Line => False,
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Is_A_String => False,
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Value => No_String);
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type Symbol_Id is new Nat;
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No_Symbol : constant Symbol_Id := 0;
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package Symbol_Table is new GNAT.Dynamic_Tables
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(Table_Component_Type => Symbol_Data,
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Table_Index_Type => Symbol_Id,
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Table_Low_Bound => 1,
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Table_Initial => 10,
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Table_Increment => 100);
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-- The table of all symbols
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Mapping : Symbol_Table.Instance;
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-- The mapping table of symbols to values used by procedure Parse_Def_File
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-- and Preprocess.
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function Index_Of (Symbol : Name_Id) return Symbol_Id;
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-- Return the index in the Mapping table of Symbol.
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-- Return No_Symbol if Symbol in not in the Mapping table.
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-- Access to procedure types used by procedure Initialize below:
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type Error_Msg_Proc is access procedure
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(Msg : String; Flag_Location : Source_Ptr);
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type Scan_Proc is access procedure;
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type Set_Ignore_Errors_Proc is access procedure (To : Boolean);
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type Put_Char_Proc is access procedure (C : Character);
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type New_EOL_Proc is access procedure;
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procedure Initialize;
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-- Initialize the preprocessor's global structures
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procedure Setup_Hooks
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(Error_Msg : Error_Msg_Proc;
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Scan : Scan_Proc;
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Set_Ignore_Errors : Set_Ignore_Errors_Proc;
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Put_Char : Put_Char_Proc;
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New_EOL : New_EOL_Proc);
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-- Set the i/o hooks used by the preprocessor
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procedure Parse_Def_File;
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-- Parse the definition file. The definition file must have already been
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-- loaded and the scanner initialized.
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procedure Preprocess (Source_Modified : out Boolean);
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-- Preprocess the input file. The input file must have already been loaded
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-- and the scanner initialized. Source_Modified is set to True iff the
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-- preprocessor modified the source text.
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procedure Check_Command_Line_Symbol_Definition
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(Definition : String;
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Data : out Symbol_Data);
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-- Check the validity of a command line definition <symbol>=<value>.
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-- Return the symbol and its value in Data if the definition is valid,
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-- fail if it is not valid.
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procedure Change_Reserved_Keyword_To_Symbol
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(All_Keywords : Boolean := False);
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-- If Token is an Ada reserved word (other than IF, ELSIF, ELSE,
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-- END, AND, OR, THEN when All_Keywords is False), change it to
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-- Tok_Identifier with the corresponding Token_Name.
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procedure List_Symbols (Foreword : String);
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-- List the symbols used for preprocessing a file, with their values.
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-- If Foreword is not empty, Output Foreword before the list.
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end Prep;
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