parser.h revision 1.8 
1/*-
2 * Copyright (c) 1991, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Kenneth Almquist.
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 * 3. All advertising materials mentioning features or use of this software
17 *    must display the following acknowledgement:
18 *	This product includes software developed by the University of
19 *	California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 *    may be used to endorse or promote products derived from this software
22 *    without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 *	from: @(#)parser.h	8.1 (Berkeley) 5/31/93
37 *	$Id: parser.h,v 1.8 1995/01/23 06:33:06 christos Exp $
38 */
39
40/* control characters in argument strings */
41#define CTLESC '\201'
42#define CTLVAR '\202'
43#define CTLENDVAR '\203'
44#define CTLBACKQ '\204'
45#define CTLQUOTE 01		/* ored with CTLBACKQ code if in quotes */
46/*	CTLBACKQ | CTLQUOTE == '\205' */
47#define	CTLARI	'\206'
48#define	CTLENDARI '\207'
49
50/* variable substitution byte (follows CTLVAR) */
51#define VSTYPE	0x0f		/* type of variable substitution */
52#define VSNUL	0x10		/* colon--treat the empty string as unset */
53#define VSQUOTE 0x80		/* inside double quotes--suppress splitting */
54
55/* values of VSTYPE field */
56#define VSNORMAL	0x1		/* normal variable:  $var or ${var} */
57#define VSMINUS		0x2		/* ${var-text} */
58#define VSPLUS		0x3		/* ${var+text} */
59#define VSQUESTION	0x4		/* ${var?message} */
60#define VSASSIGN	0x5		/* ${var=text} */
61#define VSTRIMLEFT	0x6		/* ${var#pattern} */
62#define VSTRIMLEFTMAX	0x7		/* ${var##pattern} */
63#define VSTRIMRIGHT	0x8		/* ${var%pattern} */
64#define VSTRIMRIGHTMAX 	0x9		/* ${var%%pattern} */
65#define VSLENGTH	0xa		/* ${#var} */
66
67
68/*
69 * NEOF is returned by parsecmd when it encounters an end of file.  It
70 * must be distinct from NULL, so we use the address of a variable that
71 * happens to be handy.
72 */
73extern int tokpushback;
74#define NEOF ((union node *)&tokpushback)
75extern int whichprompt;		/* 1 == PS1, 2 == PS2 */
76
77
78#ifdef __STDC__
79union node *parsecmd(int);
80int goodname(char *);
81char *getprompt(void *);
82void fixredir(union node *, const char *, int);
83#else
84union node *parsecmd();
85int goodname();
86char *getprompt();
87void fixredir();
88#endif
89