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      1 /*	$NetBSD: defs.h,v 1.14 2022/05/31 08:43:16 andvar Exp $	*/
      2 
      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  * $FreeBSD: head/usr.bin/sed/defs.h 192732 2009-05-25 06:45:33Z brian $
     37  */
     38 
     39 /*
     40  * Types of address specifications
     41  */
     42 enum 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  */
     52 struct 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  */
     63 struct 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  */
     78 struct 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 	size_t nmultis;
     87 };
     88 
     89 /*
     90  * An internally compiled command.
     91  * Initially, label references are stored in t, on a second pass they
     92  * are updated to pointers.
     93  */
     94 struct 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  */
    112 enum 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  */
    130 struct s_appends {
    131 	enum {AP_STRING, AP_FILE} type;
    132 	char *s;
    133 	size_t len;
    134 };
    135 
    136 enum 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  */
    144 typedef 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