| The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 1 | /* $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 | */ |
| 74 | extern int tokpushback; |
| 75 | #define NEOF ((union node *)&tokpushback) |
| 76 | extern int whichprompt; /* 1 == PS1, 2 == PS2 */ |
| 77 | |
| 78 | |
| 79 | union node *parsecmd(int); |
| 80 | void fixredir(union node *, const char *, int); |
| 81 | int goodname(char *); |
| 82 | const char *getprompt(void *); |