usr.bin/sed/defs.h

   1 /*      $NetBSD: defs.h,v 1.12 2014/06/06 21:56:39 wiz 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  * Initialy, 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         char *back;             /* Backing memory. */
 149         size_t blen;            /* Backing memory length. */
 150 } SPACE;