1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1992 Diomidis Spinellis. 5 * Copyright (c) 1992, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * Diomidis Spinellis of Imperial College, University of London. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * @(#)defs.h 8.1 (Berkeley) 6/6/93 36 * $FreeBSD$ 37 */ 38 39 /* 40 * Types of address specifications 41 */ 42 enum e_atype { 43 AT_RE = 1, /* Line that match RE */ 44 AT_LINE, /* Specific line */ 45 AT_RELLINE, /* Relative line */ 46 AT_LAST, /* Last line */ 47 }; 48 49 /* 50 * Format of an address 51 */ 52 struct s_addr { 53 enum e_atype type; /* Address type */ 54 union { 55 u_long l; /* Line number */ 56 regex_t *r; /* Regular expression */ 57 } u; 58 }; 59 60 /* 61 * Substitution command 62 */ 63 struct s_subst { 64 int n; /* Occurrence to subst. */ 65 int p; /* True if p flag */ 66 int icase; /* True if I flag */ 67 char *wfile; /* NULL if no wfile */ 68 int wfd; /* Cached file descriptor */ 69 regex_t *re; /* Regular expression */ 70 unsigned int maxbref; /* Largest backreference. */ 71 u_long linenum; /* Line number. */ 72 char *new; /* Replacement text */ 73 }; 74 75 /* 76 * Translate command. 77 */ 78 struct s_tr { 79 unsigned char bytetab[256]; 80 struct trmulti { 81 size_t fromlen; 82 char from[MB_LEN_MAX]; 83 size_t tolen; 84 char to[MB_LEN_MAX]; 85 } *multis; 86 int nmultis; 87 }; 88 89 /* 90 * An internally compiled command. 91 * Initially, label references are stored in t, on a second pass they 92 * are updated to pointers. 93 */ 94 struct s_command { 95 struct s_command *next; /* Pointer to next command */ 96 struct s_addr *a1, *a2; /* Start and end address */ 97 u_long startline; /* Start line number or zero */ 98 char *t; /* Text for : a c i r w */ 99 union { 100 struct s_command *c; /* Command(s) for b t { */ 101 struct s_subst *s; /* Substitute command */ 102 struct s_tr *y; /* Replace command array */ 103 int fd; /* File descriptor for w */ 104 } u; 105 char code; /* Command code */ 106 u_int nonsel:1; /* True if ! */ 107 }; 108 109 /* 110 * Types of command arguments recognised by the parser 111 */ 112 enum e_args { 113 EMPTY, /* d D g G h H l n N p P q x = \0 */ 114 TEXT, /* a c i */ 115 NONSEL, /* ! */ 116 GROUP, /* { */ 117 ENDGROUP, /* } */ 118 COMMENT, /* # */ 119 BRANCH, /* b t */ 120 LABEL, /* : */ 121 RFILE, /* r */ 122 WFILE, /* w */ 123 SUBST, /* s */ 124 TR /* y */ 125 }; 126 127 /* 128 * Structure containing things to append before a line is read 129 */ 130 struct s_appends { 131 enum {AP_STRING, AP_FILE} type; 132 char *s; 133 size_t len; 134 }; 135 136 enum e_spflag { 137 APPEND, /* Append to the contents. */ 138 REPLACE, /* Replace the contents. */ 139 }; 140 141 /* 142 * Structure for a space (process, hold, otherwise). 143 */ 144 typedef struct { 145 char *space; /* Current space pointer. */ 146 size_t len; /* Current length. */ 147 int deleted; /* If deleted. */ 148 int append_newline; /* If originally terminated by \n. */ 149 char *back; /* Backing memory. */ 150 size_t blen; /* Backing memory length. */ 151 } SPACE; 152