-- --
-- S p e c --
-- --
--- Copyright (C) 1992-1998 Free Software Foundation, Inc. --
+-- Copyright (C) 1992-2009 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- --
+-- 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 COPYING. If not, write --
--- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
--- MA 02111-1307, USA. --
+-- or FITNESS FOR A PARTICULAR PURPOSE. --
-- --
--- As a special exception, if other files instantiate generics from this --
--- unit, or you link this unit with other files to produce an executable, --
--- this unit does not by itself cause the resulting executable to be --
--- covered by the GNU General Public License. This exception does not --
--- however invalidate any other reasons why the executable file might be --
--- covered by the GNU Public License. --
+-- As a special exception under Section 7 of GPL version 3, you are granted --
+-- additional permissions described in the GCC Runtime Library Exception, --
+-- version 3.1, as published by the Free Software Foundation. --
+-- --
+-- You should have received a copy of the GNU General Public License and --
+-- a copy of the GCC Runtime Library Exception along with this program; --
+-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
+-- <http://www.gnu.org/licenses/>. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
--- Subprograms for manipulation of wide character sequences
+-- Subprograms for manipulation of wide character sequences. Note that in
+-- this package, wide character and wide wide character are not distinguished
+-- since this package is basically concerned with syntactic notions, and it
+-- deals with Char_Code values, rather than values of actual Ada types.
with Types; use Types;
package Widechar is
+ Wide_Char_Byte_Count : Nat := 0;
+ -- This value is incremented whenever Scan_Wide or Skip_Wide is called.
+ -- The amount added is the length of the wide character sequence minus
+ -- one. This means that the count that accumulates here represents the
+ -- difference between the length in characters and the length in bytes.
+ -- This is used for checking the line length in characters.
+
function Length_Wide return Nat;
-- Returns the maximum length in characters for the escape sequence that
-- is used to encode wide character literals outside the ASCII range. Used
- -- only in the implementation of the attribute Width for Wide_Character.
+ -- only in the implementation of the attribute Width for Wide_Character
+ -- and Wide_Wide_Character.
procedure Scan_Wide
(S : Source_Buffer_Ptr;
-- checking is done, since this is only used on escape sequences generated
-- by Set_Wide, which are known to be correct.
+ procedure Skip_Wide (S : Source_Buffer_Ptr; P : in out Source_Ptr);
+ -- Similar to the above procedure, but operates on a source buffer
+ -- instead of a string, with P being a Source_Ptr referencing the
+ -- contents of the source buffer.
+
function Is_Start_Of_Wide_Char
- (S : Source_Buffer_Ptr;
- P : Source_Ptr)
- return Boolean;
+ (S : Source_Buffer_Ptr;
+ P : Source_Ptr) return Boolean;
-- Determines if S (P) is the start of a wide character sequence
end Widechar;
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