New Language: Ada

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@45956 138bc75d-0d04-0410-961f-82ee72b054a4

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+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT COMPILER COMPONENTS                         --
+--                                                                          --
+--                              P R J . U T I L                             --
+--                                                                          --
+--                                 S p e c                                  --
+--                                                                          --
+--                            $Revision: 1.6 $
+--                                                                          --
+--             Copyright (C) 2001 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. --
+-- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
+--                                                                          --
+------------------------------------------------------------------------------
+--
+--  Utilities when using project files.
+
+with GNAT.OS_Lib; use GNAT.OS_Lib;
+with Types;       use Types;
+
+package Prj.Util is
+
+   function Value_Of
+     (Index    : Name_Id;
+      In_Array : Array_Element_Id)
+      return     Name_Id;
+   --  Get a single string array component.
+   --  Returns No_Name if there is no component Index (case sensitive),
+   --  if In_Array is null, or if the component is a String list.
+
+   function Value_Of
+     (Index    : Name_Id;
+      In_Array : Array_Element_Id)
+      return     Variable_Value;
+   --  Get a string array component (single String or String list).
+   --  Returns Nil_Variable_Value if there is no component Index
+   --  (case sensitive), or if In_Array is null.
+
+   function Value_Of
+     (Name                    : Name_Id;
+      Attribute_Or_Array_Name : Name_Id;
+      In_Package              : Package_Id)
+      return                   Variable_Value;
+   --  In a specific package,
+   --   - if there exists an array Variable_Or_Array_Name with an index
+   --     Name, returns the corresponding component,
+   --   - otherwise if there is a attribute Attribute_Or_Array_Name,
+   --     returns this attribute,
+   --   - otherwise, returns Nil_Variable_Value.
+   --  If In_Package is null, returns Nil_Variable_Value.
+
+   function Value_Of
+     (Index     : Name_Id;
+      In_Array  : Name_Id;
+      In_Arrays : Array_Id)
+      return      Name_Id;
+   --  Get a string array component in an array of an array list.
+   --  Returns No_Name if there is no component Index (case sensitive),
+   --  if In_Arrays is null, if In_Array is not found in In_Arrays,
+   --  or if the component is a String list.
+
+   function Value_Of
+     (Name      : Name_Id;
+      In_Arrays : Array_Id)
+      return      Array_Element_Id;
+   --  Returns a specified array in an array list.
+   --  Returns No_Array_Element if In_Arrays is null or if Name is not the
+   --  name of an array in In_Arrays.
+   --  Assumption: Name is in lower case.
+
+   function Value_Of
+     (Name        : Name_Id;
+      In_Packages : Package_Id)
+      return        Package_Id;
+   --  Returns a specified package in a package list.
+   --  Returns No_Package if In_Packages is null or if Name is not the
+   --  name of a package in Package_List.
+   --  Assumption: Name is in lower case.
+
+   function Value_Of
+     (Variable_Name : Name_Id;
+      In_Variables  : Variable_Id)
+      return          Variable_Value;
+   --  Returns a specified variable in a variable list.
+   --  Returns null if In_Variables is null or if Variable_Name
+   --  is not the name of a variable in In_Variables.
+   --  Assumption: Variable_Name is in lower case.
+
+   procedure Write_Str
+     (S          : String;
+      Max_Length : Positive;
+      Separator  : Character);
+   --  Output string S using Output.Write_Str.
+   --  If S is too long to fit in one line of Max_Length, cut it in
+   --  several lines, using Separator as the last character of each line,
+   --  if possible.
+
+   type Text_File is limited private;
+   --  Represents a text file.
+   --  Default is invalid text file.
+
+   function Is_Valid (File : Text_File) return Boolean;
+   --  Returns True if File designates an open text file that
+   --  has not yet been closed.
+
+   procedure Open (File : out Text_File; Name : String);
+   --  Open a text file. If this procedure fails, File is invalid.
+
+   function End_Of_File (File : Text_File) return Boolean;
+   --  Returns True if the end of the text file File has been
+   --  reached. Fails if File is invalid.
+
+   procedure Get_Line
+     (File : Text_File;
+      Line : out String;
+      Last : out Natural);
+   --  Reads a line from an open text file. Fails if File is invalid.
+
+   procedure Close (File : in out Text_File);
+   --  Close an open text file. File becomes invalid.
+   --  Fails if File is already invalid.
+
+private
+
+   type Text_File_Data is record
+      FD                  : File_Descriptor := Invalid_FD;
+      Buffer              : String (1 .. 1_000);
+      Buffer_Len          : Natural;
+      Cursor              : Natural := 0;
+      End_Of_File_Reached : Boolean := False;
+   end record;
+
+   type Text_File is access Text_File_Data;
+
+end Prj.Util;