1 /* $OpenBSD: defs.h,v 1.10 2022/12/26 19:16:02 jmc Exp $ */ 2 /*- 3 * Copyright (c) 1992 Diomidis Spinellis. 4 * Copyright (c) 1992, 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 * Diomidis Spinellis of Imperial College, University of London. 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 * from: @(#)defs.h 8.1 (Berkeley) 6/6/93 35 */ 36 37 /* 38 * Types of address specifications 39 */ 40 enum e_atype { 41 AT_RE, /* Line that match RE */ 42 AT_LINE, /* Specific line */ 43 AT_LAST, /* Last line */ 44 }; 45 46 /* 47 * Format of an address 48 */ 49 struct s_addr { 50 enum e_atype type; /* Address type */ 51 union { 52 u_long l; /* Line number */ 53 regex_t *r; /* Regular expression */ 54 } u; 55 }; 56 57 /* 58 * Substitution command 59 */ 60 struct s_subst { 61 int n; /* Occurrence to subst. */ 62 int p; /* True if p flag */ 63 char *wfile; /* NULL if no wfile */ 64 int wfd; /* Cached file descriptor */ 65 regex_t *re; /* Regular expression */ 66 u_int maxbref; /* Largest backreference. */ 67 u_long linenum; /* Line number. */ 68 char *new; /* Replacement text */ 69 }; 70 71 72 /* 73 * An internally compiled command. 74 * Initially, label references are stored in t, on a second pass they 75 * are updated to pointers. 76 */ 77 struct s_command { 78 struct s_command *next; /* Pointer to next command */ 79 struct s_addr *a1, *a2; /* Start and end address */ 80 char *t; /* Text for : a c i r w */ 81 union { 82 struct s_command *c; /* Command(s) for b t { */ 83 struct s_subst *s; /* Substitute command */ 84 u_char *y; /* Replace command array */ 85 int fd; /* File descriptor for w */ 86 } u; 87 char code; /* Command code */ 88 u_int nonsel:1; /* True if ! */ 89 u_int inrange:1; /* True if in range */ 90 }; 91 92 /* 93 * Types of command arguments recognised by the parser 94 */ 95 enum e_args { 96 EMPTY, /* d D g G h H l n N p P q x = \0 */ 97 TEXT, /* a c i */ 98 NONSEL, /* ! */ 99 GROUP, /* { */ 100 ENDGROUP, /* } */ 101 COMMENT, /* # */ 102 BRANCH, /* b t */ 103 LABEL, /* : */ 104 RFILE, /* r */ 105 WFILE, /* w */ 106 SUBST, /* s */ 107 TR /* y */ 108 }; 109 110 /* 111 * Structure containing things to append before a line is read 112 */ 113 struct s_appends { 114 enum {AP_STRING, AP_FILE} type; 115 char *s; 116 size_t len; 117 }; 118 119 enum e_spflag { 120 APPEND, /* Append to the contents. */ 121 REPLACE, /* Replace the contents. */ 122 }; 123 124 /* 125 * Structure for a space (process, hold, otherwise). 126 */ 127 typedef struct { 128 char *space; /* Current space pointer. */ 129 size_t len; /* Current length. */ 130 int deleted; /* If deleted. */ 131 int append_newline; /* If originally terminated by \n. */ 132 char *back; /* Backing memory. */ 133 size_t blen; /* Backing memory length. */ 134 } SPACE; 135 136 /* 137 * Error severity codes: 138 */ 139 #define FATAL 1 /* Exit immediately with 1 */ 140 #define COMPILE 2 /* Print error, count and finish script */ 141 142 /* 143 * Round up to the nearest multiple of _POSIX2_LINE_MAX 144 */ 145 #define ROUNDLEN(x) \ 146 (((x) + _POSIX2_LINE_MAX - 1) & ~(_POSIX2_LINE_MAX - 1)) 147