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  * 3. 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: head/usr.bin/sed/defs.h 269729 2014-08-08 17:29:01Z dumbbell $
  35  */
  36
  37 /*
  38  * Types of address specifications
  39  */
  40 enum e_atype {
  41         AT_RE       = 1,                        /* Line that match RE */
  42         AT_LINE,                                /* Specific line */
  43         AT_RELLINE,                             /* Relative line */
  44         AT_LAST,                                /* Last line */
  45 };
  46
  47 /*
  48  * Format of an address
  49  */
  50 struct s_addr {
  51         enum e_atype type;                      /* Address type */
  52         union {
  53                 u_long l;                       /* Line number */
  54                 regex_t *r;                     /* Regular expression */
  55         } u;
  56 };
  57
  58 /*
  59  * Substitution command
  60  */
  61 struct s_subst {
  62         int n;                                  /* Occurrence to subst. */
  63         int p;                                  /* True if p flag */
  64         int icase;                              /* True if I flag */
  65         char *wfile;                            /* NULL if no wfile */
  66         int wfd;                                /* Cached file descriptor */
  67         regex_t *re;                            /* Regular expression */
  68         unsigned int maxbref;                   /* Largest backreference. */
  69         u_long linenum;                         /* Line number. */
  70         char *new;                              /* Replacement text */
  71 };
  72
  73 /*
  74  * Translate command.
  75  */
  76 struct s_tr {
  77         unsigned char bytetab[256];
  78         struct trmulti {
  79                 size_t fromlen;
  80                 char from[MB_LEN_MAX];
  81                 size_t tolen;
  82                 char to[MB_LEN_MAX];
  83         } *multis;
  84         int nmultis;
  85 };
  86
  87 /*
  88  * An internally compiled command.
  89  * Initialy, label references are stored in t, on a second pass they
  90  * are updated to pointers.
  91  */
  92 struct s_command {
  93         struct s_command *next;                 /* Pointer to next command */
  94         struct s_addr *a1, *a2;                 /* Start and end address */
  95         u_long startline;                       /* Start line number or zero */
  96         char *t;                                /* Text for : a c i r w */
  97         union {
  98                 struct s_command *c;            /* Command(s) for b t { */
  99                 struct s_subst *s;              /* Substitute command */
 100                 struct s_tr *y;                 /* Replace command array */
 101                 int fd;                         /* File descriptor for w */
 102         } u;
 103         char code;                              /* Command code */
 104         u_int nonsel:1;                         /* True if ! */
 105 };
 106
 107 /*
 108  * Types of command arguments recognised by the parser
 109  */
 110 enum e_args {
 111         EMPTY,                  /* d D g G h H l n N p P q x = \0 */
 112         TEXT,                   /* a c i */
 113         NONSEL,                 /* ! */
 114         GROUP,                  /* { */
 115         ENDGROUP,               /* } */
 116         COMMENT,                /* # */
 117         BRANCH,                 /* b t */
 118         LABEL,                  /* : */
 119         RFILE,                  /* r */
 120         WFILE,                  /* w */
 121         SUBST,                  /* s */
 122         TR                      /* y */
 123 };
 124
 125 /*
 126  * Structure containing things to append before a line is read
 127  */
 128 struct s_appends {
 129         enum {AP_STRING, AP_FILE} type;
 130         char *s;
 131         size_t len;
 132 };
 133
 134 enum e_spflag {
 135         APPEND,                                 /* Append to the contents. */
 136         REPLACE,                                /* Replace the contents. */
 137 };
 138
 139 /*
 140  * Structure for a space (process, hold, otherwise).
 141  */
 142 typedef struct {
 143         char *space;            /* Current space pointer. */
 144         size_t len;             /* Current length. */
 145         int deleted;            /* If deleted. */
 146         int append_newline;     /* If originally terminated by \n. */
 147         char *back;             /* Backing memory. */
 148         size_t blen;            /* Backing memory length. */
 149 } SPACE;