hist.h revision 26926 
1/*-
2 * Copyright (c) 1992, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Christos Zoulas of Cornell University.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 *    must display the following acknowledgement:
18 *	This product includes software developed by the University of
19 *	California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 *    may be used to endorse or promote products derived from this software
22 *    without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 *	@(#)hist.h	8.1 (Berkeley) 6/4/93
37 */
38
39/*
40 * el.hist.c: History functions
41 */
42#ifndef _h_el_hist
43#define _h_el_hist
44
45#include "histedit.h"
46
47typedef const HistEvent *	(*hist_fun_t) __P((ptr_t, int, ...));
48
49typedef struct el_history_t {
50    char *buf;				/* The history buffer		*/
51    char *last;				/* The last character		*/
52    int eventno;			/* Event we are looking for	*/
53    ptr_t ref;				/* Argument for history fcns	*/
54    hist_fun_t fun;			/* Event access			*/
55    const HistEvent *ev;		/* Event cookie			*/
56} el_history_t;
57
58#define HIST_FUN(el, fn, arg)	\
59    ((((el)->el_history.ev = \
60       (*(el)->el_history.fun)((el)->el_history.ref, fn, arg)) == NULL) ? \
61     NULL : (el)->el_history.ev->str)
62
63#define	HIST_NEXT(el)		HIST_FUN(el, H_NEXT, NULL)
64#define	HIST_FIRST(el)		HIST_FUN(el, H_FIRST, NULL)
65#define	HIST_LAST(el)		HIST_FUN(el, H_LAST, NULL)
66#define	HIST_PREV(el)		HIST_FUN(el, H_PREV, NULL)
67#define	HIST_EVENT(el, num)	HIST_FUN(el, H_EVENT, num)
68#define HIST_LOAD(el, fname)	HIST_FUN(el, H_LOAD fname)
69#define HIST_SAVE(el, fname)	HIST_FUN(el, H_SAVE fname)
70
71protected int 		hist_init	__P((EditLine *));
72protected void 		hist_end	__P((EditLine *));
73protected el_action_t	hist_get	__P((EditLine *));
74protected int		hist_set	__P((EditLine *, hist_fun_t, ptr_t));
75protected int		hist_list	__P((EditLine *, int, char **));
76
77#endif /* _h_el_hist */
78