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defs.h revision 1.7 
      1 /*	$NetBSD: defs.h,v 1.7 1997/01/09 20:21:28 tls 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. All advertising materials mentioning features or use of this software
     20  *    must display the following acknowledgement:
     21  *	This product includes software developed by the University of
     22  *	California, Berkeley and its contributors.
     23  * 4. Neither the name of the University nor the names of its contributors
     24  *    may be used to endorse or promote products derived from this software
     25  *    without specific prior written permission.
     26  *
     27  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     28  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     29  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     30  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     31  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     32  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     33  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     34  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     35  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     36  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     37  * SUCH DAMAGE.
     38  *
     39  *	from: @(#)defs.h	8.1 (Berkeley) 6/6/93
     40  *	$NetBSD: defs.h,v 1.7 1997/01/09 20:21:28 tls Exp $
     41  */
     42 
     43 /*
     44  * Types of address specifications
     45  */
     46 enum e_atype {
     47 	AT_RE,					/* Line that match RE */
     48 	AT_LINE,				/* Specific line */
     49 	AT_LAST,				/* Last line */
     50 };
     51 
     52 /*
     53  * Format of an address
     54  */
     55 struct s_addr {
     56 	enum e_atype type;			/* Address type */
     57 	union {
     58 		u_long l;			/* Line number */
     59 		regex_t *r;			/* Regular expression */
     60 	} u;
     61 };
     62 
     63 /*
     64  * Substitution command
     65  */
     66 struct s_subst {
     67 	int n;					/* Occurrence to subst. */
     68 	int p;					/* True if p flag */
     69 	char *wfile;				/* NULL if no wfile */
     70 	int wfd;				/* Cached file descriptor */
     71 	regex_t *re;				/* Regular expression */
     72 	int maxbref;				/* Largest backreference. */
     73 	u_long linenum;				/* Line number. */
     74 	char *new;				/* Replacement text */
     75 };
     76 
     77 
     78 /*
     79  * An internally compiled command.
     80  * Initialy, label references are stored in t, on a second pass they
     81  * are updated to pointers.
     82  */
     83 struct s_command {
     84 	struct s_command *next;			/* Pointer to next command */
     85 	struct s_addr *a1, *a2;			/* Start and end address */
     86 	char *t;				/* Text for : a c i r w */
     87 	union {
     88 		struct s_command *c;		/* Command(s) for b t { */
     89 		struct s_subst *s;		/* Substitute command */
     90 		u_char *y;			/* Replace command array */
     91 		int fd;				/* File descriptor for w */
     92 	} u;
     93 	char code;				/* Command code */
     94 	u_int nonsel:1;				/* True if ! */
     95 	u_int inrange:1;			/* True if in range */
     96 };
     97 
     98 /*
     99  * Types of command arguments recognised by the parser
    100  */
    101 enum e_args {
    102 	EMPTY,			/* d D g G h H l n N p P q x = \0 */
    103 	TEXT,			/* a c i */
    104 	NONSEL,			/* ! */
    105 	GROUP,			/* { */
    106 	ENDGROUP,		/* } */
    107 	COMMENT,		/* # */
    108 	BRANCH,			/* b t */
    109 	LABEL,			/* : */
    110 	RFILE,			/* r */
    111 	WFILE,			/* w */
    112 	SUBST,			/* s */
    113 	TR			/* y */
    114 };
    115 
    116 /*
    117  * Structure containing things to append before a line is read
    118  */
    119 struct s_appends {
    120 	enum {AP_STRING, AP_FILE} type;
    121 	char *s;
    122 	size_t len;
    123 };
    124 
    125 enum e_spflag {
    126 	APPEND,					/* Append to the contents. */
    127 	REPLACE,				/* Replace the contents. */
    128 };
    129 
    130 /*
    131  * Structure for a space (process, hold, otherwise).
    132  */
    133 typedef struct {
    134 	char *space;		/* Current space pointer. */
    135 	size_t len;		/* Current length. */
    136 	int deleted;		/* If deleted. */
    137 	char *back;		/* Backing memory. */
    138 	size_t blen;		/* Backing memory length. */
    139 } SPACE;
    140 
    141 /*
    142  * Error severity codes:
    143  */
    144 #define	FATAL		0	/* Exit immediately with 1 */
    145 #define	ERROR		1	/* Continue, but change exit value */
    146 #define	WARNING		2	/* Just print the warning */
    147 #define	COMPILE		3	/* Print error, count and finish script */
    148 #define	COMPILE2	3	/* Print error, count and finish script */
    149