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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
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* PROTO_S ((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
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* PROTO_S ((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
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* PROTO_S ((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
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* PROTO_S ((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
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* PROTO_S ((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
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* PROTO_S ((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
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* PROTO_S ((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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PROTO_S ((char));
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extern char syntax_upcase
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PROTO_S ((char));
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extern char syntax_downcase
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PROTO_S ((char));
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extern BoolT syntax_is_white_space
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PROTO_S ((char));
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extern BoolT syntax_is_printable
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PROTO_S ((char));
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extern BoolT syntax_is_letter
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PROTO_S ((char));
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extern BoolT syntax_is_digit
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PROTO_S ((char));
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#endif /* !defined (H_SYNTAX) */
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