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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 | * %sccs.include.redist.c% | |
9 | * | |
10 | * @(#)parser.h 5.1 (Berkeley) %G% | |
11 | */ | |
12 | ||
13 | /* control characters in argument strings */ | |
14 | #define CTLESC '\201' | |
15 | #define CTLVAR '\202' | |
16 | #define CTLENDVAR '\203' | |
17 | #define CTLBACKQ '\204' | |
18 | #define CTLQUOTE 01 /* ored with CTLBACKQ code if in quotes */ | |
19 | ||
20 | /* variable substitution byte (follows CTLVAR) */ | |
21 | #define VSTYPE 07 /* type of variable substitution */ | |
22 | #define VSNUL 040 /* colon--treat the empty string as unset */ | |
23 | #define VSQUOTE 0100 /* inside double quotes--suppress splitting */ | |
24 | ||
25 | /* values of VSTYPE field */ | |
26 | #define VSNORMAL 1 /* normal variable: $var or ${var} */ | |
27 | #define VSMINUS 2 /* ${var-text} */ | |
28 | #define VSPLUS 3 /* ${var+text} */ | |
29 | #define VSQUESTION 4 /* ${var?message} */ | |
30 | #define VSASSIGN 5 /* ${var=text} */ | |
31 | ||
32 | ||
33 | /* | |
34 | * NEOF is returned by parsecmd when it encounters an end of file. It | |
35 | * must be distinct from NULL, so we use the address of a variable that | |
36 | * happens to be handy. | |
37 | */ | |
38 | extern int tokpushback; | |
39 | #define NEOF ((union node *)&tokpushback) | |
40 | ||
41 | ||
42 | #ifdef __STDC__ | |
43 | union node *parsecmd(int); | |
44 | int goodname(char *); | |
45 | #else | |
46 | union node *parsecmd(); | |
47 | int goodname(); | |
48 | #endif |