usr.bin/sed/defs.h

   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  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  *      @(#)defs.h      8.1 (Berkeley) 6/6/93
  34  * $FreeBSD: src/usr.bin/sed/defs.h,v 1.8 2009/05/25 06:45:33 brian Exp $
  35  * $DragonFly: src/usr.bin/sed/defs.h,v 1.2 2008/04/08 13:23:38 swildner Exp $
  36  */
  37
  38 /*
  39  * Types of address specifications
  40  */
  41 enum e_atype {
  42         AT_RE       = 1,                        /* Line that match RE */
  43         AT_LINE,                                /* Specific line */
  44         AT_RELLINE,                             /* Relative line */
  45         AT_LAST,                                /* Last line */
  46 };
  47
  48 /*
  49  * Format of an address
  50  */
  51 struct s_addr {
  52         enum e_atype type;                      /* Address type */
  53         union {
  54                 u_long l;                       /* Line number */
  55                 regex_t *r;                     /* Regular expression */
  56         } u;
  57 };
  58
  59 /*
  60  * Substitution command
  61  */
  62 struct s_subst {
  63         int n;                                  /* Occurrence to subst. */
  64         int p;                                  /* True if p flag */
  65         int icase;                              /* True if I flag */
  66         char *wfile;                            /* NULL if no wfile */
  67         int wfd;                                /* Cached file descriptor */
  68         regex_t *re;                            /* Regular expression */
  69         unsigned int maxbref;                   /* Largest backreference. */
  70         u_long linenum;                         /* Line number. */
  71         char *new;                              /* Replacement text */
  72 };
  73
  74 /*
  75  * Translate command.
  76  */
  77 struct s_tr {
  78         unsigned char bytetab[256];
  79         struct trmulti {
  80                 size_t fromlen;
  81                 char from[MB_LEN_MAX];
  82                 size_t tolen;
  83                 char to[MB_LEN_MAX];
  84         } *multis;
  85         int nmultis;
  86 };
  87
  88 /*
  89  * An internally compiled command.
  90  * Initialy, label references are stored in t, on a second pass they
  91  * are updated to pointers.
  92  */
  93 struct s_command {
  94         struct s_command *next;                 /* Pointer to next command */
  95         struct s_addr *a1, *a2;                 /* Start and end address */
  96         u_long startline;                       /* Start line number or zero */
  97         char *t;                                /* Text for : a c i r w */
  98         union {
  99                 struct s_command *c;            /* Command(s) for b t { */
 100                 struct s_subst *s;              /* Substitute command */
 101                 struct s_tr *y;                 /* Replace command array */
 102                 int fd;                         /* File descriptor for w */
 103         } u;
 104         char code;                              /* Command code */
 105         u_int nonsel:1;                         /* True if ! */
 106 };
 107
 108 /*
 109  * Types of command arguments recognised by the parser
 110  */
 111 enum e_args {
 112         EMPTY,                  /* d D g G h H l n N p P q x = \0 */
 113         TEXT,                   /* a c i */
 114         NONSEL,                 /* ! */
 115         GROUP,                  /* { */
 116         ENDGROUP,               /* } */
 117         COMMENT,                /* # */
 118         BRANCH,                 /* b t */
 119         LABEL,                  /* : */
 120         RFILE,                  /* r */
 121         WFILE,                  /* w */
 122         SUBST,                  /* s */
 123         TR                      /* y */
 124 };
 125
 126 /*
 127  * Structure containing things to append before a line is read
 128  */
 129 struct s_appends {
 130         enum {AP_STRING, AP_FILE} type;
 131         char *s;
 132         size_t len;
 133 };
 134
 135 enum e_spflag {
 136         APPEND,                                 /* Append to the contents. */
 137         REPLACE,                                /* Replace the contents. */
 138 };
 139
 140 /*
 141  * Structure for a space (process, hold, otherwise).
 142  */
 143 typedef struct {
 144         char *space;            /* Current space pointer. */
 145         size_t len;             /* Current length. */
 146         int deleted;            /* If deleted. */
 147         char *back;             /* Backing memory. */
 148         size_t blen;            /* Backing memory length. */
 149 } SPACE;