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af3e82f7 WJ |
1 | /*- |
2 | * Copyright (c) 1991 The Regents of the University of California. | |
3 | * 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 | * @(#)parser.h 5.1 (Berkeley) 3/7/91 | |
37 | */ | |
38 | ||
39 | /* control characters in argument strings */ | |
40 | #define CTLESC '\201' | |
41 | #define CTLVAR '\202' | |
42 | #define CTLENDVAR '\203' | |
43 | #define CTLBACKQ '\204' | |
44 | #define CTLQUOTE 01 /* ored with CTLBACKQ code if in quotes */ | |
45 | ||
46 | /* variable substitution byte (follows CTLVAR) */ | |
47 | #define VSTYPE 07 /* type of variable substitution */ | |
48 | #define VSNUL 040 /* colon--treat the empty string as unset */ | |
49 | #define VSQUOTE 0100 /* inside double quotes--suppress splitting */ | |
50 | ||
51 | /* values of VSTYPE field */ | |
52 | #define VSNORMAL 1 /* normal variable: $var or ${var} */ | |
53 | #define VSMINUS 2 /* ${var-text} */ | |
54 | #define VSPLUS 3 /* ${var+text} */ | |
55 | #define VSQUESTION 4 /* ${var?message} */ | |
56 | #define VSASSIGN 5 /* ${var=text} */ | |
57 | ||
58 | ||
59 | /* | |
60 | * NEOF is returned by parsecmd when it encounters an end of file. It | |
61 | * must be distinct from NULL, so we use the address of a variable that | |
62 | * happens to be handy. | |
63 | */ | |
64 | extern int tokpushback; | |
65 | #define NEOF ((union node *)&tokpushback) | |
66 | ||
67 | ||
68 | #ifdef __STDC__ | |
69 | union node *parsecmd(int); | |
70 | int goodname(char *); | |
71 | #else | |
72 | union node *parsecmd(); | |
73 | int goodname(); | |
74 | #endif |