dist/nvi/common/seq.h

   1 /*      $NetBSD$ */
   2
   3 /*-
   4  * Copyright (c) 1992, 1993, 1994
   5  *      The Regents of the University of California.  All rights reserved.
   6  * Copyright (c) 1992, 1993, 1994, 1995, 1996
   7  *      Keith Bostic.  All rights reserved.
   8  *
   9  * See the LICENSE file for redistribution information.
  10  *
  11  *      Id: seq.h,v 10.3 1996/03/06 19:51:03 bostic Exp (Berkeley) Date: 1996/03/06 19:51:03
  12  */
  13
  14 /*
  15  * Map and abbreviation structures.
  16  *
  17  * The map structure is doubly linked list, sorted by input string and by
  18  * input length within the string.  (The latter is necessary so that short
  19  * matches will happen before long matches when the list is searched.)
  20  * Additionally, there is a bitmap which has bits set if there are entries
  21  * starting with the corresponding character.  This keeps us from walking
  22  * the list unless it's necessary.
  23  *
  24  * The name and the output fields of a SEQ can be empty, i.e. NULL.
  25  * Only the input field is required.
  26  *
  27  * XXX
  28  * The fast-lookup bits are never turned off -- users don't usually unmap
  29  * things, though, so it's probably not a big deal.
  30  */
  31 struct _seq {
  32         LIST_ENTRY(_seq) q;             /* Linked list of all sequences. */
  33         seq_t    stype;                 /* Sequence type. */
  34         CHAR_T  *name;                  /* Sequence name (if any). */
  35         size_t   nlen;                  /* Name length. */
  36         CHAR_T  *input;                 /* Sequence input keys. */
  37         size_t   ilen;                  /* Input keys length. */
  38         CHAR_T  *output;                /* Sequence output keys. */
  39         size_t   olen;                  /* Output keys length. */
  40
  41 #define SEQ_FUNCMAP     0x01            /* If unresolved function key.*/
  42 #define SEQ_NOOVERWRITE 0x02            /* Don't replace existing entry. */
  43 #define SEQ_SCREEN      0x04            /* If screen specific. */
  44 #define SEQ_USERDEF     0x08            /* If user defined. */
  45         u_int8_t flags;
  46 };