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The Android Open Source Projectdd7bc332009-03-03 19:32:55 -08001/* $NetBSD: parser.h,v 1.17 2004/06/26 22:09:49 dsl 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. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 * @(#)parser.h 8.3 (Berkeley) 5/4/95
35 */
36
37/* control characters in argument strings */
38#define CTL_FIRST '\201' /* first 'special' character */
39#define CTLESC '\201' /* escape next character */
40#define CTLVAR '\202' /* variable defn */
41#define CTLENDVAR '\203'
42#define CTLBACKQ '\204'
43#define CTLQUOTE 01 /* ored with CTLBACKQ code if in quotes */
44/* CTLBACKQ | CTLQUOTE == '\205' */
45#define CTLARI '\206' /* arithmetic expression */
46#define CTLENDARI '\207'
47#define CTLQUOTEMARK '\210'
48#define CTLQUOTEEND '\211' /* only inside ${...} */
49#define CTL_LAST '\211' /* last 'special' character */
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(int);
80void fixredir(union node *, const char *, int);
81int goodname(char *);
82const char *getprompt(void *);