/*

 * $XConsortium: ifparser.h /main/4 1996/09/28 16:15:24 rws $

 *

 * Copyright 1992 Network Computing Devices, Inc.

 * 

 * Permission to use, copy, modify, and distribute this software and its

 * documentation for any purpose and without fee is hereby granted, provided

 * that the above copyright notice appear in all copies and that both that

 * copyright notice and this permission notice appear in supporting

 * documentation, and that the name of Network Computing Devices may not be

 * used in advertising or publicity pertaining to distribution of the software

 * without specific, written prior permission.  Network Computing Devices makes

 * no representations about the suitability of this software for any purpose.

 * It is provided ``as is'' without express or implied warranty.

 * 

 * NETWORK COMPUTING DEVICES DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS

 * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS,

 * IN NO EVENT SHALL NETWORK COMPUTING DEVICES BE LIABLE FOR ANY SPECIAL,

 * INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM

 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE

 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR

 * PERFORMANCE OF THIS SOFTWARE.

 * 

 * Author:  Jim Fulton

 *          Network Computing Devices, Inc.

 * 

 * Simple if statement processor

 *

 * This module can be used to evaluate string representations of C language

 * if constructs.  It accepts the following grammar:

 * 

 *     EXPRESSION	:=	VALUE

 * 			 |	VALUE  BINOP	EXPRESSION

 *			 |	VALUE	'?'	EXPRESSION ':'	EXPRESSION

 * 

 *     VALUE		:=	'('  EXPRESSION  ')'

 * 			 |	'!'  VALUE

 * 			 |	'-'  VALUE

 *			 |	'~'  VALUE

 * 			 |	'defined'  '('  variable  ')'

 * 			 |	variable

 * 			 |	number

 * 

 *     BINOP		:=	'*'	|  '/'	|  '%'

 * 			 |	'+'	|  '-'

 * 			 |	'<<'	|  '>>'

 * 			 |	'<'	|  '>'	|  '<='  |  '>='

 * 			 |	'=='	|  '!='

 * 			 |	'&'	|  '^'  |  '|'

 * 			 |	'&&'	|  '||'

 * 

 * The normal C order of precedence is supported.

 * 

 * 

 * External Entry Points:

 * 

 *     ParseIfExpression		parse a string for #if

 */

/* $XFree86: xc/config/makedepend/ifparser.h,v 3.2 1996/12/30 13:57:56 dawes Exp $ */

#include <stdio.h>

#define const /**/

typedef int Bool;

#define False 0

#define True 1

typedef struct _if_parser {

    struct {				/* functions */

	char *(*handle_error) (/* struct _if_parser *, const char *,

				 const char * */);

	long (*eval_variable) (/* struct _if_parser *, const char *, int */);

	int (*eval_defined) (/* struct _if_parser *, const char *, int */);

    } funcs;

    char *data;

} IfParser;

char *ParseIfExpression (

#ifdef __STDC__

    IfParser *, 

    const char *, 

    long *

#endif

);