xref: /illumos-gate/usr/src/cmd/sed/defs.h (revision 84441f85)
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