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/*
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 * Copyright (c) 2002-2006 The TenDRA Project <http://www.tendra.org/>.
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions are met:
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 *
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 * 1. Redistributions of source code must retain the above copyright notice,
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 *    this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright notice,
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 *    this list of conditions and the following disclaimer in the documentation
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 *    and/or other materials provided with the distribution.
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 * 3. Neither the name of The TenDRA Project nor the names of its contributors
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 *    may be used to endorse or promote products derived from this software
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 *    without specific, prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS
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 * IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR
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 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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 * EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 *
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 * $Id$
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 */
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/*
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    		 Crown Copyright (c) 1997
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    This TenDRA(r) Computer Program is subject to Copyright
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    owned by the United Kingdom Secretary of State for Defence
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    acting through the Defence Evaluation and Research Agency
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    (DERA).  It is made available to Recipients with a
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    royalty-free licence for its use, reproduction, transfer
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    to other parties and amendment for any purpose not excluding
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    product development provided that any such use et cetera
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    shall be deemed to be acceptance of the following conditions:-
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        (1) Its Recipients shall ensure that this Notice is
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        reproduced upon any copies or amended versions of it;
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        (2) Any amended version of it shall be clearly marked to
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        show both the nature of and the organisation responsible
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        for the relevant amendment or amendments;
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        (3) Its onward transfer from a recipient to another
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        party shall be deemed to be that party's acceptance of
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        these conditions;
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        (4) DERA gives no warranty or assurance as to its
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        quality or suitability for any purpose and DERA accepts
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        no liability whatsoever in relation to any use to which
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        it may be put.
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*/
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/**** syntax.h --- Character classification.
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 *
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 ** Author: Steve Folkes <smf@hermes.mod.uk>
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 *
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 **** Commentary:
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 *
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 ***=== INTRODUCTION =========================================================
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 *
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 * This file specifies the interface to a number of syntax table manipulation
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 * functions.  I ought to be able to use <ctype.h> for this, but I can't
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 * because it doesn't have routines to get the numeric value for alphabetic
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 * characters (amongst other omissions).  As I need to do this here, I might
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 * as well put in support for everything.
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 *
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 * It is assumed elsewhere (in association with the input stream facility
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 * specified in the file "istream.h") that the null and newline characters are
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 * white space, and have no digit value.
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 *
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 ***=== CONSTANTS ============================================================
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 *
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 ** Constant:	SYNTAX_NO_VALUE
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 *
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 * This value is returned by the ``syntax_value'' function for characters that
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 * do not have a digit value.
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 *
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 ***=== FUNCTIONS ============================================================
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 *
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 ** Function:	int syntax_value(char c)
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 ** Exceptions:
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 *
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 * This function returns the positive integer digit value that the specified
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 * character should have, or ``SYNTAX_NO_VALUE'' if it has no value.
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 *
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 ** Function:	char syntax_upcase(char c)
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 ** Exceptions:
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 *
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 * This function returns the upper case version of the specified character if
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 * it has one, otherwise it just returns the character.
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 *
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 ** Function:	char syntax_downcase(char c)
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 ** Exceptions:
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 *
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 * This function returns the lower case version of the specified character if
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 * it has one, otherwise it just returns the character.
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 *
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 ** Function:	BoolT syntax_is_white_space(char c)
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 *
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 * This function returns true if the specified character is a white space
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 * character, and false otherwise.
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 *
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 ** Function:	BoolT syntax_is_printable(char c)
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 ** Exceptions:
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 *
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 * This function returns true if the specified character can be printed, and
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 * false otherwise.
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 *
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 ** Function:	BoolT syntax_is_letter(char c)
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 ** Exceptions:
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 *
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 * This function returns true if the specified character is a letter, and
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 * false otherwise.
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 *
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 ** Function:	BoolT syntax_is_digit(char c)
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 ** Exceptions:
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 *
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 * This function returns true if the specified character is a decimal digit,
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 * and false otherwise.
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 *
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 **** Change Log:
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 * $Log: syntax.h,v $
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 * Revision 1.1.1.1  1998/01/17  15:57:18  release
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 * First version to be checked into rolling release.
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 *
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 * Revision 1.2  1994/12/12  11:45:54  smf
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 * Performing changes for 'CR94_178.sid+tld-update' - bringing in line with
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 * OSSG C Coding Standards.
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 *
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 * Revision 1.1.1.1  1994/07/25  16:06:13  smf
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 * Initial import of os-interface shared files.
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 *
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**/
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/****************************************************************************/
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#ifndef H_SYNTAX
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#define H_SYNTAX
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#include "os-interface.h"
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/*--------------------------------------------------------------------------*/
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#define SYNTAX_NO_VALUE	(-1)
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/*--------------------------------------------------------------------------*/
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extern int			syntax_value
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(char);
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extern char			syntax_upcase
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(char);
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extern char			syntax_downcase
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(char);
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extern BoolT			syntax_is_white_space
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(char);
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extern BoolT			syntax_is_printable
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(char);
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extern BoolT			syntax_is_letter
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(char);
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extern BoolT			syntax_is_digit
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(char);
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#endif /* !defined (H_SYNTAX) */