external/bsd/nvi/dist/common/seq.h

   1 /*      $NetBSD: seq.h,v 1.2 2013/11/22 15:52:05 christos Exp $ */
   2 /*-
   3  * Copyright (c) 1992, 1993, 1994
   4  *      The Regents of the University of California.  All rights reserved.
   5  * Copyright (c) 1992, 1993, 1994, 1995, 1996
   6  *      Keith Bostic.  All rights reserved.
   7  *
   8  * See the LICENSE file for redistribution information.
   9  *
  10  *      Id: seq.h,v 10.3 1996/03/06 19:51:03 bostic Exp  (Berkeley) Date: 1996/03/06 19:51:03
  11  */
  12
  13 /*
  14  * Map and abbreviation structures.
  15  *
  16  * The map structure is doubly linked list, sorted by input string and by
  17  * input length within the string.  (The latter is necessary so that short
  18  * matches will happen before long matches when the list is searched.)
  19  * Additionally, there is a bitmap which has bits set if there are entries
  20  * starting with the corresponding character.  This keeps us from walking
  21  * the list unless it's necessary.
  22  *
  23  * The name and the output fields of a SEQ can be empty, i.e. NULL.
  24  * Only the input field is required.
  25  *
  26  * XXX
  27  * The fast-lookup bits are never turned off -- users don't usually unmap
  28  * things, though, so it's probably not a big deal.
  29  */
  30 struct _seq {
  31         LIST_ENTRY(_seq) q;             /* Linked list of all sequences. */
  32         seq_t    stype;                 /* Sequence type. */
  33         CHAR_T  *name;                  /* Sequence name (if any). */
  34         size_t   nlen;                  /* Name length. */
  35         CHAR_T  *input;                 /* Sequence input keys. */
  36         size_t   ilen;                  /* Input keys length. */
  37         CHAR_T  *output;                /* Sequence output keys. */
  38         size_t   olen;                  /* Output keys length. */
  39
  40 #define SEQ_FUNCMAP     0x01            /* If unresolved function key.*/
  41 #define SEQ_NOOVERWRITE 0x02            /* Don't replace existing entry. */
  42 #define SEQ_SCREEN      0x04            /* If screen specific. */
  43 #define SEQ_USERDEF     0x08            /* If user defined. */
  44         u_int8_t flags;
  45 };