/* * $XConsortium: ifparser.h,v 1.1 92/08/22 13:05:39 rws Exp $ * Copyright (c) 1998-2003 Carnegie Mellon University. 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, 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. * * 3. The name "Carnegie Mellon University" must not be used to * endorse or promote products derived from this software without * prior written permission. For permission or any other legal * details, please contact * Office of Technology Transfer * Carnegie Mellon University * 5000 Forbes Avenue * Pittsburgh, PA 15213-3890 * (412) 268-4387, fax: (412) 268-7395 * tech-transfer@andrew.cmu.edu * * 4. Redistributions of any form whatsoever must retain the following * acknowledgment: * "This product includes software developed by Computing Services * at Carnegie Mellon University (http://www.cmu.edu/computing/)." * * CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY * AND FITNESS, IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY 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. * * * 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 * */);