| 1 | /* $NetBSD: parser.h,v 1.17 2004/06/26 22:09:49 dsl Exp $ */
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| 2 |
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| 3 | /*-
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| 4 | * Copyright (c) 1991, 1993
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| 5 | * The Regents of the University of California. All rights reserved.
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| 6 | *
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| 7 | * This code is derived from software contributed to Berkeley by
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| 8 | * Kenneth Almquist.
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| 9 | *
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| 10 | * Redistribution and use in source and binary forms, with or without
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| 11 | * modification, are permitted provided that the following conditions
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| 12 | * are met:
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| 13 | * 1. Redistributions of source code must retain the above copyright
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| 14 | * notice, this list of conditions and the following disclaimer.
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| 15 | * 2. Redistributions in binary form must reproduce the above copyright
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| 16 | * notice, this list of conditions and the following disclaimer in the
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| 17 | * documentation and/or other materials provided with the distribution.
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| 18 | * 3. Neither the name of the University nor the names of its contributors
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| 19 | * may be used to endorse or promote products derived from this software
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| 20 | * without specific prior written permission.
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| 21 | *
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| 22 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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| 23 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 24 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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| 25 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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| 26 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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| 27 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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| 28 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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| 29 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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| 30 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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| 31 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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| 32 | * SUCH DAMAGE.
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| 33 | *
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| 34 | * @(#)parser.h 8.3 (Berkeley) 5/4/95
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| 35 | */
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| 36 |
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| 37 | /* control characters in argument strings */
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| 38 | #define CTL_FIRST '\201' /* first 'special' character */
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| 39 | #define CTLESC '\201' /* escape next character */
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| 40 | #define CTLVAR '\202' /* variable defn */
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| 41 | #define CTLENDVAR '\203'
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| 42 | #define CTLBACKQ '\204'
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| 43 | #define CTLQUOTE 01 /* ored with CTLBACKQ code if in quotes */
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| 44 | /* CTLBACKQ | CTLQUOTE == '\205' */
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| 45 | #define CTLARI '\206' /* arithmetic expression */
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| 46 | #define CTLENDARI '\207'
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| 47 | #define CTLQUOTEMARK '\210'
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| 48 | #define CTLQUOTEEND '\211' /* only inside ${...} */
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| 49 | #define CTL_LAST '\211' /* last 'special' character */
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| 50 |
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| 51 | /* variable substitution byte (follows CTLVAR) */
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| 52 | #define VSTYPE 0x0f /* type of variable substitution */
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| 53 | #define VSNUL 0x10 /* colon--treat the empty string as unset */
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| 54 | #define VSQUOTE 0x80 /* inside double quotes--suppress splitting */
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| 55 |
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| 56 | /* values of VSTYPE field */
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| 57 | #define VSNORMAL 0x1 /* normal variable: $var or ${var} */
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| 58 | #define VSMINUS 0x2 /* ${var-text} */
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| 59 | #define VSPLUS 0x3 /* ${var+text} */
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| 60 | #define VSQUESTION 0x4 /* ${var?message} */
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| 61 | #define VSASSIGN 0x5 /* ${var=text} */
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| 62 | #define VSTRIMLEFT 0x6 /* ${var#pattern} */
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| 63 | #define VSTRIMLEFTMAX 0x7 /* ${var##pattern} */
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| 64 | #define VSTRIMRIGHT 0x8 /* ${var%pattern} */
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| 65 | #define VSTRIMRIGHTMAX 0x9 /* ${var%%pattern} */
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| 66 | #define VSLENGTH 0xa /* ${#var} */
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| 67 |
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| 68 |
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| 69 | /*
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| 70 | * NEOF is returned by parsecmd when it encounters an end of file. It
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| 71 | * must be distinct from NULL, so we use the address of a variable that
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| 72 | * happens to be handy.
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| 73 | */
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| 74 | extern int tokpushback;
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| 75 | #define NEOF ((union node *)&tokpushback)
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| 76 | extern int whichprompt; /* 1 == PS1, 2 == PS2 */
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| 77 |
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| 78 |
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| 79 | union node *parsecmd(int);
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| 80 | void fixredir(union node *, const char *, int);
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| 81 | int goodname(char *);
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| 82 | const char *getprompt(void *);
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