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/*
*
* 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
*/
#include <stdio.h>
typedef int Bool;
#define False 0
#define True 1
typedef struct _if_parser {
struct { /* functions */
const 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;
const char *ParseIfExpression (
IfParser *,
const char *,
long *
);
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