1/*	$NetBSD: hist.c,v 1.5 2005/06/09 16:48:57 lukem Exp $	*/
2/*	from	NetBSD: hist.c,v 1.15 2003/11/01 23:36:39 christos Exp	*/
3
4/*-
5 * Copyright (c) 1992, 1993
6 *	The Regents of the University of California.  All rights reserved.
7 *
8 * This code is derived from software contributed to Berkeley by
9 * Christos Zoulas of Cornell University.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 *    notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 *    notice, this list of conditions and the following disclaimer in the
18 *    documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its contributors
20 *    may be used to endorse or promote products derived from this software
21 *    without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 */
35
36#include "tnftp.h"
37#include "sys.h"
38
39/*
40 * hist.c: History access functions
41 */
42#include <stdlib.h>
43#include "el.h"
44
45/* hist_init():
46 *	Initialization function.
47 */
48protected int
49hist_init(EditLine *el)
50{
51
52	el->el_history.fun = NULL;
53	el->el_history.ref = NULL;
54	el->el_history.buf = (char *) el_malloc(EL_BUFSIZ);
55	el->el_history.sz  = EL_BUFSIZ;
56	if (el->el_history.buf == NULL)
57		return (-1);
58	el->el_history.last = el->el_history.buf;
59	return (0);
60}
61
62
63/* hist_end():
64 *	clean up history;
65 */
66protected void
67hist_end(EditLine *el)
68{
69
70	el_free((ptr_t) el->el_history.buf);
71	el->el_history.buf = NULL;
72}
73
74
75/* hist_set():
76 *	Set new history interface
77 */
78protected int
79hist_set(EditLine *el, hist_fun_t fun, ptr_t ptr)
80{
81
82	el->el_history.ref = ptr;
83	el->el_history.fun = fun;
84	return (0);
85}
86
87
88/* hist_get():
89 *	Get a history line and update it in the buffer.
90 *	eventno tells us the event to get.
91 */
92protected el_action_t
93hist_get(EditLine *el)
94{
95	const char *hp;
96	int h;
97
98	if (el->el_history.eventno == 0) {	/* if really the current line */
99		(void) strncpy(el->el_line.buffer, el->el_history.buf,
100		    el->el_history.sz);
101		el->el_line.lastchar = el->el_line.buffer +
102		    (el->el_history.last - el->el_history.buf);
103
104#ifdef KSHVI
105		if (el->el_map.type == MAP_VI)
106			el->el_line.cursor = el->el_line.buffer;
107		else
108#endif /* KSHVI */
109			el->el_line.cursor = el->el_line.lastchar;
110
111		return (CC_REFRESH);
112	}
113	if (el->el_history.ref == NULL)
114		return (CC_ERROR);
115
116	hp = HIST_FIRST(el);
117
118	if (hp == NULL)
119		return (CC_ERROR);
120
121	for (h = 1; h < el->el_history.eventno; h++)
122		if ((hp = HIST_NEXT(el)) == NULL) {
123			el->el_history.eventno = h;
124			return (CC_ERROR);
125		}
126	(void) strlcpy(el->el_line.buffer, hp,
127			(size_t)(el->el_line.limit - el->el_line.buffer));
128	el->el_line.lastchar = el->el_line.buffer + strlen(el->el_line.buffer);
129
130	if (el->el_line.lastchar > el->el_line.buffer
131	    && el->el_line.lastchar[-1] == '\n')
132		el->el_line.lastchar--;
133	if (el->el_line.lastchar > el->el_line.buffer
134	    && el->el_line.lastchar[-1] == ' ')
135		el->el_line.lastchar--;
136#ifdef KSHVI
137	if (el->el_map.type == MAP_VI)
138		el->el_line.cursor = el->el_line.buffer;
139	else
140#endif /* KSHVI */
141		el->el_line.cursor = el->el_line.lastchar;
142
143	return (CC_REFRESH);
144}
145
146
147/* hist_command()
148 *	process a history command
149 */
150protected int
151hist_command(EditLine *el, int argc, const char **argv)
152{
153	const char *str;
154	int num;
155	HistEvent ev;
156
157	if (el->el_history.ref == NULL)
158		return (-1);
159
160	if (argc == 1 || strcmp(argv[1], "list") == 0) {
161		 /* List history entries */
162
163		for (str = HIST_LAST(el); str != NULL; str = HIST_PREV(el))
164			(void) fprintf(el->el_outfile, "%d %s",
165			    el->el_history.ev.num, str);
166		return (0);
167	}
168
169	if (argc != 3)
170		return (-1);
171
172	num = (int)strtol(argv[2], NULL, 0);
173
174	if (strcmp(argv[1], "size") == 0)
175		return history(el->el_history.ref, &ev, H_SETSIZE, num);
176
177	if (strcmp(argv[1], "unique") == 0)
178		return history(el->el_history.ref, &ev, H_SETUNIQUE, num);
179
180	return -1;
181}
182
183/* hist_enlargebuf()
184 *	Enlarge history buffer to specified value. Called from el_enlargebufs().
185 *	Return 0 for failure, 1 for success.
186 */
187protected int
188/*ARGSUSED*/
189hist_enlargebuf(EditLine *el, size_t oldsz, size_t newsz)
190{
191	char *newbuf;
192
193	newbuf = realloc(el->el_history.buf, newsz);
194	if (!newbuf)
195		return 0;
196
197	(void) memset(&newbuf[oldsz], '\0', newsz - oldsz);
198
199	el->el_history.last = newbuf +
200				(el->el_history.last - el->el_history.buf);
201	el->el_history.buf = newbuf;
202	el->el_history.sz  = newsz;
203
204	return 1;
205}
206