parser.h revision 1.14 
1/*	$NetBSD: parser.h,v 1.14 2000/07/27 04:09:28 cgd 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#define	CTLQUOTEMARK '\210'
51
52/* variable substitution byte (follows CTLVAR) */
53#define VSTYPE	0x0f		/* type of variable substitution */
54#define VSNUL	0x10		/* colon--treat the empty string as unset */
55#define VSQUOTE 0x80		/* inside double quotes--suppress splitting */
56
57/* values of VSTYPE field */
58#define VSNORMAL	0x1		/* normal variable:  $var or ${var} */
59#define VSMINUS		0x2		/* ${var-text} */
60#define VSPLUS		0x3		/* ${var+text} */
61#define VSQUESTION	0x4		/* ${var?message} */
62#define VSASSIGN	0x5		/* ${var=text} */
63#define VSTRIMLEFT	0x6		/* ${var#pattern} */
64#define VSTRIMLEFTMAX	0x7		/* ${var##pattern} */
65#define VSTRIMRIGHT	0x8		/* ${var%pattern} */
66#define VSTRIMRIGHTMAX 	0x9		/* ${var%%pattern} */
67#define VSLENGTH	0xa		/* ${#var} */
68
69
70/*
71 * NEOF is returned by parsecmd when it encounters an end of file.  It
72 * must be distinct from NULL, so we use the address of a variable that
73 * happens to be handy.
74 */
75extern int tokpushback;
76#define NEOF ((union node *)&tokpushback)
77extern int whichprompt;		/* 1 == PS1, 2 == PS2 */
78
79
80union node *parsecmd(int);
81void fixredir(union node *, const char *, int);
82int goodname(char *);
83const char *getprompt(void *);
84