1#ifndef COND_H
2#define COND_H
3/*	$OpenBSD: cond.h,v 1.5 2010/07/19 19:46:44 espie Exp $ */
4
5/*
6 * Copyright (c) 2001 Marc Espie.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE OPENBSD PROJECT AND CONTRIBUTORS
18 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20 * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OPENBSD
21 * PROJECT OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30/* cond
31 *	Parse Makefile conditionals.
32 */
33
34/* Values returned by Cond_Eval.  */
35#define COND_PARSE	0	/* Parse the next lines */
36#define COND_SKIP	1	/* Skip the next lines */
37#define COND_INVALID	2	/* Not a conditional statement */
38#define COND_ISFOR	3
39#define COND_ISUNDEF	4
40#define COND_ISINCLUDE	5
41#define COND_ISPOISON	6
42
43/* whattodo = Cond_Eval(line);
44 *	Parses a conditional expression (without the leading dot),
45 *	and returns a decision value.
46 *	State is kept internally, since conditionals nest.  */
47extern int Cond_Eval(const char *);
48
49/* Cond_End();
50 *	To call at end of parsing, checks that all conditionals were
51 *	closed.  */
52extern void Cond_End(void);
53
54#endif
55