parser.h revision 1.11 
1/*	$NetBSD: parser.h,v 1.11 1996/10/16 15:45:15 christos Exp $	*/
2
3/*-
4 * Copyright (c) 1991, 1993
5 *	The Regents of the University of California.  All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * Kenneth Almquist.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 *    must display the following acknowledgement:
20 *	This product includes software developed by the University of
21 *	California, Berkeley and its contributors.
22 * 4. Neither the name of the University nor the names of its contributors
23 *    may be used to endorse or promote products derived from this software
24 *    without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * SUCH DAMAGE.
37 *
38 *	@(#)parser.h	8.3 (Berkeley) 5/4/95
39 */
40
41/* control characters in argument strings */
42#define CTLESC '\201'
43#define CTLVAR '\202'
44#define CTLENDVAR '\203'
45#define CTLBACKQ '\204'
46#define CTLQUOTE 01		/* ored with CTLBACKQ code if in quotes */
47/*	CTLBACKQ | CTLQUOTE == '\205' */
48#define	CTLARI	'\206'
49#define	CTLENDARI '\207'
50
51/* variable substitution byte (follows CTLVAR) */
52#define VSTYPE	0x0f		/* type of variable substitution */
53#define VSNUL	0x10		/* colon--treat the empty string as unset */
54#define VSQUOTE 0x80		/* inside double quotes--suppress splitting */
55
56/* values of VSTYPE field */
57#define VSNORMAL	0x1		/* normal variable:  $var or ${var} */
58#define VSMINUS		0x2		/* ${var-text} */
59#define VSPLUS		0x3		/* ${var+text} */
60#define VSQUESTION	0x4		/* ${var?message} */
61#define VSASSIGN	0x5		/* ${var=text} */
62#define VSTRIMLEFT	0x6		/* ${var#pattern} */
63#define VSTRIMLEFTMAX	0x7		/* ${var##pattern} */
64#define VSTRIMRIGHT	0x8		/* ${var%pattern} */
65#define VSTRIMRIGHTMAX 	0x9		/* ${var%%pattern} */
66#define VSLENGTH	0xa		/* ${#var} */
67
68
69/*
70 * NEOF is returned by parsecmd when it encounters an end of file.  It
71 * must be distinct from NULL, so we use the address of a variable that
72 * happens to be handy.
73 */
74extern int tokpushback;
75#define NEOF ((union node *)&tokpushback)
76extern int whichprompt;		/* 1 == PS1, 2 == PS2 */
77
78
79union node *parsecmd __P((int));
80void fixredir __P((union node *, const char *, int));
81int goodname __P((char *));
82char *getprompt __P((void *));
83