lobase

Linux port of OpenBSDs userland.

defs.h (4422B)


      1 /*	$OpenBSD: defs.h,v 1.8 2017/01/20 10:26:16 krw Exp $ */
      2 /*-
      3  * Copyright (c) 1992 Diomidis Spinellis.
      4  * Copyright (c) 1992, 1993
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * This code is derived from software contributed to Berkeley by
      8  * Diomidis Spinellis of Imperial College, University of London.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  * 3. Neither the name of the University nor the names of its contributors
     19  *    may be used to endorse or promote products derived from this software
     20  *    without specific prior written permission.
     21  *
     22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     32  * SUCH DAMAGE.
     33  *
     34  *	from: @(#)defs.h	8.1 (Berkeley) 6/6/93
     35  */
     36 
     37 /*
     38  * Types of address specifications
     39  */
     40 enum e_atype {
     41 	AT_RE,					/* Line that match RE */
     42 	AT_LINE,				/* Specific line */
     43 	AT_LAST,				/* Last line */
     44 };
     45 
     46 /*
     47  * Format of an address
     48  */
     49 struct s_addr {
     50 	enum e_atype type;			/* Address type */
     51 	union {
     52 		u_long l;			/* Line number */
     53 		regex_t *r;			/* Regular expression */
     54 	} u;
     55 };
     56 
     57 /*
     58  * Substitution command
     59  */
     60 struct s_subst {
     61 	int n;					/* Occurrence to subst. */
     62 	int p;					/* True if p flag */
     63 	char *wfile;				/* NULL if no wfile */
     64 	int wfd;				/* Cached file descriptor */
     65 	regex_t *re;				/* Regular expression */
     66 	int maxbref;				/* Largest backreference. */
     67 	u_long linenum;				/* Line number. */
     68 	char *new;				/* Replacement text */
     69 };
     70 
     71 
     72 /*
     73  * An internally compiled command.
     74  * Initialy, label references are stored in t, on a second pass they
     75  * are updated to pointers.
     76  */
     77 struct s_command {
     78 	struct s_command *next;			/* Pointer to next command */
     79 	struct s_addr *a1, *a2;			/* Start and end address */
     80 	char *t;				/* Text for : a c i r w */
     81 	union {
     82 		struct s_command *c;		/* Command(s) for b t { */
     83 		struct s_subst *s;		/* Substitute command */
     84 		u_char *y;			/* Replace command array */
     85 		int fd;				/* File descriptor for w */
     86 	} u;
     87 	char code;				/* Command code */
     88 	u_int nonsel:1;				/* True if ! */
     89 	u_int inrange:1;			/* True if in range */
     90 };
     91 
     92 /*
     93  * Types of command arguments recognised by the parser
     94  */
     95 enum e_args {
     96 	EMPTY,			/* d D g G h H l n N p P q x = \0 */
     97 	TEXT,			/* a c i */
     98 	NONSEL,			/* ! */
     99 	GROUP,			/* { */
    100 	ENDGROUP,		/* } */
    101 	COMMENT,		/* # */
    102 	BRANCH,			/* b t */
    103 	LABEL,			/* : */
    104 	RFILE,			/* r */
    105 	WFILE,			/* w */
    106 	SUBST,			/* s */
    107 	TR			/* y */
    108 };
    109 
    110 /*
    111  * Structure containing things to append before a line is read
    112  */
    113 struct s_appends {
    114 	enum {AP_STRING, AP_FILE} type;
    115 	char *s;
    116 	size_t len;
    117 };
    118 
    119 enum e_spflag {
    120 	APPEND,					/* Append to the contents. */
    121 	REPLACE,				/* Replace the contents. */
    122 };
    123 
    124 /*
    125  * Structure for a space (process, hold, otherwise).
    126  */
    127 typedef struct {
    128 	char *space;		/* Current space pointer. */
    129 	size_t len;		/* Current length. */
    130 	int deleted;		/* If deleted. */
    131 	int append_newline;	/* If originally terminated by \n. */
    132 	char *back;		/* Backing memory. */
    133 	size_t blen;		/* Backing memory length. */
    134 } SPACE;
    135 
    136 /*
    137  * Error severity codes:
    138  */
    139 #define	FATAL		1	/* Exit immediately with 1 */
    140 #define	COMPILE		2	/* Print error, count and finish script */
    141 
    142 /*
    143  * Round up to the nearest multiple of _POSIX2_LINE_MAX
    144  */
    145 #define ROUNDLEN(x) \
    146     (((x) + _POSIX2_LINE_MAX - 1) & ~(_POSIX2_LINE_MAX - 1))