/usr/share/ada/adainclude/opentoken/html_lexer-task_safe.ads is in libopentoken5-dev 6.0b-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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--
-- Copyright (C) 2009, 2014 Stephen Leake
-- Copyright (C) 1999, 2000 Christoph Karl Walter Grein
--
-- This file is part of the OpenToken package.
--
-- The OpenToken package is free software; you can redistribute it and/or
-- modify it under the terms of the GNU General Public License as published
-- by the Free Software Foundation; either version 3, or (at your option)
-- any later version. The OpenToken package is distributed in the hope that
-- it will be useful, but WITHOUT 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 the OpenToken
-- package; see file GPL.txt. 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.
-------------------------------------------------------------------------------
with OpenToken.Text_Feeder;
package HTML_Lexer.Task_Safe is
-----------------------------------------------------------------------
-- This is a lexical analyser for the HTML language.
--
-- All state data is stored in the Lexer_Type object, so it is
-- task safe.
--
-- <Tag Attribute=Value Attribute="String"> Text with &entity; </Tag>
------------------------------------------------------------------------
type Lexer_Type is limited private;
procedure Initialize
(Lexer : in out Lexer_Type;
Input_Feeder : access OpenToken.Text_Feeder.Instance'Class);
procedure Next_Token
(Lexer : in out Lexer_Type;
Token : out HTML_Token);
private
type Lexer_Type is record
-- We switch syntax during parsing. The Syntax structure
-- contains state, so each lexer needs its own copy.
Text_Syntax : Tokenizer.Syntax;
Tag_Syntax : Tokenizer.Syntax;
Analyzer : Tokenizer.Handle;
end record;
end HTML_Lexer.Task_Safe;
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