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 */ 37 38 /* 39 * Types of address specifications 40 */ 41 enum e_atype { 42 AT_RE = 1, /* Line that match RE */ 43 AT_LINE, /* Specific line */ 44 AT_RELLINE, /* Relative line */ 45 AT_LAST, /* Last line */ 46 }; 47 48 /* 49 * Format of an address 50 */ 51 struct s_addr { 52 enum e_atype type; /* Address type */ 53 union { 54 u_long l; /* Line number */ 55 regex_t *r; /* Regular expression */ 56 } u; 57 }; 58 59 /* 60 * Substitution command 61 */ 62 struct s_subst { 63 int n; /* Occurrence to subst. */ 64 int p; /* True if p flag */ 65 int icase; /* True if I flag */ 66 char *wfile; /* NULL if no wfile */ 67 int wfd; /* Cached file descriptor */ 68 regex_t *re; /* Regular expression */ 69 unsigned int maxbref; /* Largest backreference. */ 70 u_long linenum; /* Line number. */ 71 char *new; /* Replacement text */ 72 }; 73 74 /* 75 * Translate command. 76 */ 77 struct s_tr { 78 unsigned char bytetab[256]; 79 struct trmulti { 80 size_t fromlen; 81 char from[MB_LEN_MAX]; 82 size_t tolen; 83 char to[MB_LEN_MAX]; 84 } *multis; 85 int nmultis; 86 }; 87 88 /* 89 * An internally compiled command. 90 * Initially, label references are stored in t, on a second pass they 91 * are updated to pointers. 92 */ 93 struct s_command { 94 struct s_command *next; /* Pointer to next command */ 95 struct s_addr *a1, *a2; /* Start and end address */ 96 u_long startline; /* Start line number or zero */ 97 char *t; /* Text for : a c i r w */ 98 union { 99 struct s_command *c; /* Command(s) for b t { */ 100 struct s_subst *s; /* Substitute command */ 101 struct s_tr *y; /* Replace command array */ 102 int fd; /* File descriptor for w */ 103 } u; 104 char code; /* Command code */ 105 u_int nonsel:1; /* True if ! */ 106 }; 107 108 /* 109 * Types of command arguments recognised by the parser 110 */ 111 enum e_args { 112 EMPTY, /* d D g G h H l n N p P q x = \0 */ 113 TEXT, /* a c i */ 114 NONSEL, /* ! */ 115 GROUP, /* { */ 116 ENDGROUP, /* } */ 117 COMMENT, /* # */ 118 BRANCH, /* b t */ 119 LABEL, /* : */ 120 RFILE, /* r */ 121 WFILE, /* w */ 122 SUBST, /* s */ 123 TR /* y */ 124 }; 125 126 /* 127 * Structure containing things to append before a line is read 128 */ 129 struct s_appends { 130 enum {AP_STRING, AP_FILE} type; 131 char *s; 132 size_t len; 133 }; 134 135 enum e_spflag { 136 APPEND, /* Append to the contents. */ 137 REPLACE, /* Replace the contents. */ 138 }; 139 140 /* 141 * Structure for a space (process, hold, otherwise). 142 */ 143 typedef struct { 144 char *space; /* Current space pointer. */ 145 size_t len; /* Current length. */ 146 int deleted; /* If deleted. */ 147 int append_newline; /* If originally terminated by \n. */ 148 char *back; /* Backing memory. */ 149 size_t blen; /* Backing memory length. */ 150 } SPACE; 151