+++ /dev/null
-------------------------------------------------------------------------------
--- --
--- GNAT COMPILER COMPONENTS --
--- --
--- W I D E C H A R --
--- --
--- S p e c --
--- --
--- $Revision: 1.1.16.2 $
--- --
--- Copyright (C) 1992-1998 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. --
--- --
--- 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. --
--- --
--- 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
-
-with Types; use Types;
-
-package Widechar is
-
- 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.
-
- procedure Scan_Wide
- (S : Source_Buffer_Ptr;
- P : in out Source_Ptr;
- C : out Char_Code;
- Err : out Boolean);
- -- On entry S (P) points to the first character in the source text for
- -- a wide character (i.e. to an ESC character, a left bracket, or an
- -- upper half character, depending on the representation method). A
- -- single wide character is scanned. If no error is found, the value
- -- stored in C is the code for this wide character, P is updated past
- -- the sequence and Err is set to False. If an error is found, then
- -- P points to the improper character, C is undefined, and Err is
- -- set to True.
-
- procedure Set_Wide
- (C : Char_Code;
- S : in out String;
- P : in out Natural);
- -- The escape sequence (including any leading ESC character) for the
- -- given character code is stored starting at S (P + 1), and on return
- -- P points to the last stored character (i.e. P is the count of stored
- -- characters on entry and exit, and the escape sequence is appended to
- -- the end of the stored string). The character code C represents a code
- -- originally constructed by Scan_Wide, so it is known to be in a range
- -- that is appropriate for the encoding method in use.
-
- procedure Skip_Wide (S : String; P : in out Natural);
- -- On entry, S (P) points to an ESC character for a wide character escape
- -- sequence or to an upper half character if the encoding method uses the
- -- upper bit, or to a left bracket if the brackets encoding method is in
- -- use. On exit, P is bumped past the wide character sequence. No error
- -- checking is done, since this is only used on escape sequences generated
- -- by Set_Wide, which are known to be correct.
-
- function Is_Start_Of_Wide_Char
- (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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