contrib/nvi/common/seq.h

   1 /*-
   2  * Copyright (c) 1992, 1993, 1994
   3  *      The Regents of the University of California.  All rights reserved.
   4  * Copyright (c) 1992, 1993, 1994, 1995, 1996
   5  *      Keith Bostic.  All rights reserved.
   6  *
   7  * See the LICENSE file for redistribution information.
   8  *
   9  *      @(#)seq.h       10.3 (Berkeley) 3/6/96
  10  */
  11
  12 /*
  13  * Map and abbreviation structures.
  14  *
  15  * The map structure is doubly linked list, sorted by input string and by
  16  * input length within the string.  (The latter is necessary so that short
  17  * matches will happen before long matches when the list is searched.)
  18  * Additionally, there is a bitmap which has bits set if there are entries
  19  * starting with the corresponding character.  This keeps us from walking
  20  * the list unless it's necessary.
  21  *
  22  * The name and the output fields of a SEQ can be empty, i.e. NULL.
  23  * Only the input field is required.
  24  *
  25  * XXX
  26  * The fast-lookup bits are never turned off -- users don't usually unmap
  27  * things, though, so it's probably not a big deal.
  28  */
  29 struct _seq {
  30         LIST_ENTRY(_seq) q;             /* Linked list of all sequences. */
  31         seq_t    stype;                 /* Sequence type. */
  32         CHAR_T  *name;                  /* Sequence name (if any). */
  33         size_t   nlen;                  /* Name length. */
  34         CHAR_T  *input;                 /* Sequence input keys. */
  35         size_t   ilen;                  /* Input keys length. */
  36         CHAR_T  *output;                /* Sequence output keys. */
  37         size_t   olen;                  /* Output keys length. */
  38
  39 #define SEQ_FUNCMAP     0x01            /* If unresolved function key.*/
  40 #define SEQ_NOOVERWRITE 0x02            /* Don't replace existing entry. */
  41 #define SEQ_SCREEN      0x04            /* If screen specific. */
  42 #define SEQ_USERDEF     0x08            /* If user defined. */
  43         u_int8_t flags;
  44 };