/*
 * Copyright (c) 2002, The Tendra Project <http://www.ten15.org/>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice unmodified, this list of conditions, and the following
 *    disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *
 *    		 Crown Copyright (c) 1997
 *    
 *    This TenDRA(r) Computer Program is subject to Copyright
 *    owned by the United Kingdom Secretary of State for Defence
 *    acting through the Defence Evaluation and Research Agency
 *    (DERA).  It is made available to Recipients with a
 *    royalty-free licence for its use, reproduction, transfer
 *    to other parties and amendment for any purpose not excluding
 *    product development provided that any such use et cetera
 *    shall be deemed to be acceptance of the following conditions:-
 *    
 *        (1) Its Recipients shall ensure that this Notice is
 *        reproduced upon any copies or amended versions of it;
 *    
 *        (2) Any amended version of it shall be clearly marked to
 *        show both the nature of and the organisation responsible
 *        for the relevant amendment or amendments;
 *    
 *        (3) Its onward transfer from a recipient to another
 *        party shall be deemed to be that party's acceptance of
 *        these conditions;
 *    
 *        (4) DERA gives no warranty or assurance as to its
 *        quality or suitability for any purpose and DERA accepts
 *        no liability whatsoever in relation to any use to which
 *        it may be put.
 *
 * $TenDRA: tendra/src/producers/common/parse/lex.h,v 1.5 2004/05/28 13:58:19 stefanf Exp $
 */


#ifndef LEX_INCLUDED
#define LEX_INCLUDED


/*
 *    LEXICAL ANALYSIS DECLARATIONS
 *
 *    The routines in this module are concerned with the lexical analysis
 *    of the input, including its decomposition into preprocessing tokens
 *    using the routine read_token.
 */

extern void init_lex(void);
extern void init_char(void);
extern void process_file(void);
extern IDENTIFIER make_keyword(HASHID, int, IDENTIFIER);
extern void init_keywords(void);
extern int read_token(void);
extern int read_string(int, int);
extern int peek_char(int, int *);
extern int skip_to_end(void);
extern unsigned long skip_white(int);
extern void patch_white(unsigned long);
extern int get_digraph(int);
extern int primary_form(int);
extern int is_white_char(unsigned long);
extern int is_alpha_char(unsigned long);
extern int is_legal_char(unsigned long);
extern void set_char_lookup(int, int);
extern void set_character(EXP, EXP);


/*
 *    LEXICAL TOKEN INFORMATION
 *
 *    These variables are used by read_token to hold information about the
 *    current lexical token.
 */

extern BUFFER token_buff;
extern HASHID token_hashid;
extern const char *token_names [];


/*
 *    LEXICAL ANALYSIS OPTIONS
 *
 *    These variables are used to configure the lexical analysis routines.
 */

extern int allow_trigraphs;
extern int allow_digraphs;
extern int allow_unicodes;
extern int allow_multibyte;
extern int allow_cpp_comments;
extern int allow_dos_newline;
extern int allow_extra_symbols;
extern int allow_iso_keywords;
extern int analyse_comments;
extern unsigned long max_id_length;


/*
 *    TOKEN NAME LOOK-UP
 *
 *    The macro token_name is used to look up the name associated with the
 *    lexical token number T.
 */

#define token_name(T)		(ustrlit (token_names [ (T) ]))


/*
 *    WHITE-SPACE INDICATORS
 *
 *    These macros are used by skip_white to indicate the form of the white-
 *    space characters skipped.
 */

#define WHITE_SPACE		((unsigned long) 0x01)
#define WHITE_NEWLINE		((unsigned long) 0x02)
#define WHITE_ESC_NEWLINE	((unsigned long) 0x04)
#define WHITE_MASK		(WHITE_SPACE | WHITE_NEWLINE)


#endif