7605a78654
Change-Id: I3df7e42b69e3900eae8d10d28a97d776fabd9f4b
76 lines
2.7 KiB
C
76 lines
2.7 KiB
C
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
|
|
/*
|
|
* $XConsortium: ifparser.h,v 1.1 92/08/22 13:05:39 rws Exp $
|
|
*
|
|
* 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 ')'
|
|
* | '!' VALUE
|
|
* | '-' VALUE
|
|
* | 'defined' '(' variable ')'
|
|
* | variable
|
|
* | number
|
|
*
|
|
* BINOP := '*' | '/' | '%'
|
|
* | '+' | '-'
|
|
* | '<<' | '>>'
|
|
* | '<' | '>' | '<=' | '>='
|
|
* | '==' | '!='
|
|
* | '&' | '|'
|
|
* | '&&' | '||'
|
|
*
|
|
* The normal C order of precidence 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 *);
|
|
int (*eval_variable) (struct if_parser *, const char *, size_t);
|
|
int (*eval_defined) (struct if_parser *, const char *, size_t);
|
|
} funcs;
|
|
char *data;
|
|
} IfParser;
|
|
|
|
const char *ParseIfExpression (IfParser *, const char *, int *);
|
|
|
|
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|