New Language: Ada

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@45960 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 87 insertions, 0 deletions

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+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT COMPILER COMPONENTS                         --
+--                                                                          --
+--                             W I D E C H A R                              --
+--                                                                          --
+--                                 S p e c                                  --
+--                                                                          --
+--                            $Revision: 1.10 $                             --
+--                                                                          --
+--          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. --
+-- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
+--                                                                          --
+------------------------------------------------------------------------------
+
+--  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;