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defs.h revision 1.6 
      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  * 3. All advertising materials mentioning features or use of this software
     18  *    must display the following acknowledgement:
     19  *	This product includes software developed by the University of
     20  *	California, Berkeley and its contributors.
     21  * 4. Neither the name of the University nor the names of its contributors
     22  *    may be used to endorse or promote products derived from this software
     23  *    without specific prior written permission.
     24  *
     25  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     27  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     28  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     29  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     30  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     31  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     32  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     33  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     34  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     35  * SUCH DAMAGE.
     36  *
     37  *	from: @(#)defs.h	8.1 (Berkeley) 6/6/93
     38  *	$Id: defs.h,v 1.6 1995/03/09 11:19:28 mycroft Exp $
     39  */
     40 
     41 /*
     42  * Types of address specifications
     43  */
     44 enum e_atype {
     45 	AT_RE,					/* Line that match RE */
     46 	AT_LINE,				/* Specific line */
     47 	AT_LAST,				/* Last line */
     48 };
     49 
     50 /*
     51  * Format of an address
     52  */
     53 struct s_addr {
     54 	enum e_atype type;			/* Address type */
     55 	union {
     56 		u_long l;			/* Line number */
     57 		regex_t *r;			/* Regular expression */
     58 	} u;
     59 };
     60 
     61 /*
     62  * Substitution command
     63  */
     64 struct s_subst {
     65 	int n;					/* Occurrence to subst. */
     66 	int p;					/* True if p flag */
     67 	char *wfile;				/* NULL if no wfile */
     68 	int wfd;				/* Cached file descriptor */
     69 	regex_t *re;				/* Regular expression */
     70 	int maxbref;				/* Largest backreference. */
     71 	u_long linenum;				/* Line number. */
     72 	char *new;				/* Replacement text */
     73 };
     74 
     75 
     76 /*
     77  * An internally compiled command.
     78  * Initialy, label references are stored in t, on a second pass they
     79  * are updated to pointers.
     80  */
     81 struct s_command {
     82 	struct s_command *next;			/* Pointer to next command */
     83 	struct s_addr *a1, *a2;			/* Start and end address */
     84 	char *t;				/* Text for : a c i r w */
     85 	union {
     86 		struct s_command *c;		/* Command(s) for b t { */
     87 		struct s_subst *s;		/* Substitute command */
     88 		u_char *y;			/* Replace command array */
     89 		int fd;				/* File descriptor for w */
     90 	} u;
     91 	char code;				/* Command code */
     92 	u_int nonsel:1;				/* True if ! */
     93 	u_int inrange:1;			/* True if in range */
     94 };
     95 
     96 /*
     97  * Types of command arguments recognised by the parser
     98  */
     99 enum e_args {
    100 	EMPTY,			/* d D g G h H l n N p P q x = \0 */
    101 	TEXT,			/* a c i */
    102 	NONSEL,			/* ! */
    103 	GROUP,			/* { */
    104 	ENDGROUP,		/* } */
    105 	COMMENT,		/* # */
    106 	BRANCH,			/* b t */
    107 	LABEL,			/* : */
    108 	RFILE,			/* r */
    109 	WFILE,			/* w */
    110 	SUBST,			/* s */
    111 	TR			/* y */
    112 };
    113 
    114 /*
    115  * Structure containing things to append before a line is read
    116  */
    117 struct s_appends {
    118 	enum {AP_STRING, AP_FILE} type;
    119 	char *s;
    120 	size_t len;
    121 };
    122 
    123 enum e_spflag {
    124 	APPEND,					/* Append to the contents. */
    125 	REPLACE,				/* Replace the contents. */
    126 };
    127 
    128 /*
    129  * Structure for a space (process, hold, otherwise).
    130  */
    131 typedef struct {
    132 	char *space;		/* Current space pointer. */
    133 	size_t len;		/* Current length. */
    134 	int deleted;		/* If deleted. */
    135 	char *back;		/* Backing memory. */
    136 	size_t blen;		/* Backing memory length. */
    137 } SPACE;
    138 
    139 /*
    140  * Error severity codes:
    141  */
    142 #define	FATAL		0	/* Exit immediately with 1 */
    143 #define	ERROR		1	/* Continue, but change exit value */
    144 #define	WARNING		2	/* Just print the warning */
    145 #define	COMPILE		3	/* Print error, count and finish script */
    146 #define	COMPILE2	3	/* Print error, count and finish script */
    147