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