дзеркало
https://github.com/TigerVNC/tigervnc.git
synced 2024-08-21 17:54:34 +02:00
77 рядки
2.5 KiB
C
77 рядки
2.5 KiB
C
![]() |
/*
|
||
|
* $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>
|
||
|
|
||
|
#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 * */);
|
||
|
int (*eval_variable) (/* struct _if_parser *, const char *, int */);
|
||
|
int (*eval_defined) (/* struct _if_parser *, const char *, int */);
|
||
|
} funcs;
|
||
|
char *data;
|
||
|
} IfParser;
|
||
|
|
||
|
char *ParseIfExpression (/* IfParser *, const char *, int * */);
|
||
|
|