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hist.h
1 /* $NetBSD: hist.h,v 1.13 2011/07/28 20:50:55 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)(void *, 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  void * 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, void *);
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, void *);
85 #endif
86 
87 #endif /* _h_el_hist */