defs.h revision 330897 
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 * 4. 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: stable/11/usr.bin/sed/defs.h 330897 2018-03-14 03:19:51Z eadler $
37 */
38
39/*
40 * Types of address specifications
41 */
42enum 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 */
52struct 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 */
63struct 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 */
78struct 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 * Initialy, label references are stored in t, on a second pass they
92 * are updated to pointers.
93 */
94struct 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 */
112enum 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 */
130struct s_appends {
131	enum {AP_STRING, AP_FILE} type;
132	char *s;
133	size_t len;
134};
135
136enum 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 */
144typedef 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