projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| d46cf1d2 KB |
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 |