lib/libedit/hist.h

   1 /*      $NetBSD: hist.h,v 1.11 2009/12/30 22:37:40 christos Exp $       */
   2
   3 /*-
   4  * Copyright (c) 1992, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * This code is derived from software contributed to Berkeley by
   8  * Christos Zoulas of Cornell University.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 3. Neither the name of the University nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  *
  34  *      @(#)hist.h      8.1 (Berkeley) 6/4/93
  35  */
  36
  37 /*
  38  * el.hist.c: History functions
  39  */
  40 #ifndef _h_el_hist
  41 #define _h_el_hist
  42
  43 #include "histedit.h"
  44
  45 typedef int (*hist_fun_t)(ptr_t, TYPE(HistEvent) *, int, ...);
  46
  47 typedef struct el_history_t {
  48         Char            *buf;           /* The history buffer           */
  49         size_t          sz;             /* Size of history buffer       */
  50         Char            *last;          /* The last character           */
  51         int              eventno;       /* Event we are looking for     */
  52         ptr_t            ref;           /* Argument for history fcns    */
  53         hist_fun_t       fun;           /* Event access                 */
  54         TYPE(HistEvent)  ev;            /* Event cookie                 */
  55 } el_history_t;
  56
  57 #define HIST_FUN_INTERNAL(el, fn, arg)  \
  58     ((((*(el)->el_history.fun) ((el)->el_history.ref, &(el)->el_history.ev, \
  59         fn, arg)) == -1) ? NULL : (el)->el_history.ev.str)
  60 #ifdef WIDECHAR
  61 #define HIST_FUN(el, fn, arg) \
  62     (((el)->el_flags & NARROW_HISTORY) ? hist_convert(el, fn, arg) : \
  63         HIST_FUN_INTERNAL(el, fn, arg))
  64 #else
  65 #define HIST_FUN(el, fn, arg) HIST_FUN_INTERNAL(el, fn, arg)
  66 #endif
  67
  68
  69 #define HIST_NEXT(el)           HIST_FUN(el, H_NEXT, NULL)
  70 #define HIST_FIRST(el)          HIST_FUN(el, H_FIRST, NULL)
  71 #define HIST_LAST(el)           HIST_FUN(el, H_LAST, NULL)
  72 #define HIST_PREV(el)           HIST_FUN(el, H_PREV, NULL)
  73 #define HIST_SET(el, num)       HIST_FUN(el, H_SET, num)
  74 #define HIST_LOAD(el, fname)    HIST_FUN(el, H_LOAD fname)
  75 #define HIST_SAVE(el, fname)    HIST_FUN(el, H_SAVE fname)
  76
  77 protected int           hist_init(EditLine *);
  78 protected void          hist_end(EditLine *);
  79 protected el_action_t   hist_get(EditLine *);
  80 protected int           hist_set(EditLine *, hist_fun_t, ptr_t);
  81 protected int           hist_command(EditLine *, int, const Char **);
  82 protected int           hist_enlargebuf(EditLine *, size_t, size_t);
  83 #ifdef WIDECHAR
  84 protected wchar_t       *hist_convert(EditLine *, int, ptr_t);
  85 #endif
  86
  87 #endif /* _h_el_hist */