source: trunk/third/nvi/common/seq.h @ 14302

/*-
 * Copyright (c) 1992, 1993, 1994
 *      The Regents of the University of California.  All rights reserved.
 * Copyright (c) 1992, 1993, 1994, 1995, 1996
 *      Keith Bostic.  All rights reserved.
 *
 * See the LICENSE file for redistribution information.
 *
 *      @(#)seq.h       10.3 (Berkeley) 3/6/96
 */

/*
 * Map and abbreviation structures.
 *
 * The map structure is doubly linked list, sorted by input string and by
 * input length within the string.  (The latter is necessary so that short
 * matches will happen before long matches when the list is searched.)
 * Additionally, there is a bitmap which has bits set if there are entries
 * starting with the corresponding character.  This keeps us from walking
 * the list unless it's necessary.
 *
 * The name and the output fields of a SEQ can be empty, i.e. NULL.
 * Only the input field is required.
 *
 * XXX
 * The fast-lookup bits are never turned off -- users don't usually unmap
 * things, though, so it's probably not a big deal.
 */
struct _seq {
        LIST_ENTRY(_seq) q;             /* Linked list of all sequences. */
        seq_t    stype;                 /* Sequence type. */
        CHAR_T  *name;                  /* Sequence name (if any). */
        size_t   nlen;                  /* Name length. */
        CHAR_T  *input;                 /* Sequence input keys. */
        size_t   ilen;                  /* Input keys length. */
        CHAR_T  *output;                /* Sequence output keys. */
        size_t   olen;                  /* Output keys length. */

#define SEQ_FUNCMAP     0x01            /* If unresolved function key.*/
#define SEQ_NOOVERWRITE 0x02            /* Don't replace existing entry. */
#define SEQ_SCREEN      0x04            /* If screen specific. */
#define SEQ_USERDEF     0x08            /* If user defined. */
        u_int8_t flags;
};