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 75