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 * $NetBSD: hist.c,v 1.8 2001/01/10 07:45:41 jdolecek Exp $
37 */
38
39#if !defined(lint) && !defined(SCCSID)
40static char sccsid[] = "@(#)hist.c 8.1 (Berkeley) 6/4/93";
41#endif /* not lint && not SCCSID */
42#include <sys/cdefs.h>
43__FBSDID("$FreeBSD: head/lib/libedit/hist.c 84334 2001-10-01 23:00:29Z obrien $");
44
45/*
46 * hist.c: History access functions
47 */
48#include "sys.h"
49#include <stdlib.h>
50#include "el.h"
51
52/* hist_init():
53 * Initialization function.
54 */
55protected int
56hist_init(EditLine *el)
57{
58
59 el->el_history.fun = NULL;
60 el->el_history.ref = NULL;
61 el->el_history.buf = (char *) el_malloc(EL_BUFSIZ);
62 el->el_history.sz = EL_BUFSIZ;
63 if (el->el_history.buf == NULL)
64 return (-1);
65 el->el_history.last = el->el_history.buf;
66 return (0);
67}
68
69
70/* hist_end():
71 * clean up history;
72 */
73protected void
74hist_end(EditLine *el)
75{
76
77 el_free((ptr_t) el->el_history.buf);
78 el->el_history.buf = NULL;
79}
80
81
82/* hist_set():
83 * Set new history interface
84 */
85protected int
86hist_set(EditLine *el, hist_fun_t fun, ptr_t ptr)
87{
88
89 el->el_history.ref = ptr;
90 el->el_history.fun = fun;
91 return (0);
92}
93
94
95/* hist_get():
96 * Get a history line and update it in the buffer.
97 * eventno tells us the event to get.
98 */
99protected el_action_t
100hist_get(EditLine *el)
101{
102 const char *hp;
103 int h;
104
105 if (el->el_history.eventno == 0) { /* if really the current line */
106 (void) strncpy(el->el_line.buffer, el->el_history.buf,
107 el->el_history.sz);
108 el->el_line.lastchar = el->el_line.buffer +
109 (el->el_history.last - el->el_history.buf);
110
111#ifdef KSHVI
112 if (el->el_map.type == MAP_VI)
113 el->el_line.cursor = el->el_line.buffer;
114 else
115#endif /* KSHVI */
116 el->el_line.cursor = el->el_line.lastchar;
117
118 return (CC_REFRESH);
119 }
120 if (el->el_history.ref == NULL)
121 return (CC_ERROR);
122
123 hp = HIST_FIRST(el);
124
125 if (hp == NULL)
126 return (CC_ERROR);
127
128 for (h = 1; h < el->el_history.eventno; h++)
129 if ((hp = HIST_NEXT(el)) == NULL) {
130 el->el_history.eventno = h;
131 return (CC_ERROR);
132 }
133 (void) strncpy(el->el_line.buffer, hp,
134 (size_t)(el->el_line.limit - el->el_line.buffer));
135 el->el_line.lastchar = el->el_line.buffer + strlen(el->el_line.buffer);
136
137 if (el->el_line.lastchar > el->el_line.buffer) {
138 if (el->el_line.lastchar[-1] == '\n')
139 el->el_line.lastchar--;
140 if (el->el_line.lastchar[-1] == ' ')
141 el->el_line.lastchar--;
142 if (el->el_line.lastchar < el->el_line.buffer)
143 el->el_line.lastchar = el->el_line.buffer;
144 }
145#ifdef KSHVI
146 if (el->el_map.type == MAP_VI)
147 el->el_line.cursor = el->el_line.buffer;
148 else
149#endif /* KSHVI */
150 el->el_line.cursor = el->el_line.lastchar;
151
152 return (CC_REFRESH);
153}
154
155
156/* hist_list()
157 * List history entries
158 */
159protected int
160/*ARGSUSED*/
161hist_list(EditLine *el, int argc, char **argv)
162{
163 const char *str;
164
165 if (el->el_history.ref == NULL)
166 return (-1);
167 for (str = HIST_LAST(el); str != NULL; str = HIST_PREV(el))
168 (void) fprintf(el->el_outfile, "%d %s",
169 el->el_history.ev.num, str);
170 return (0);
171}
172
173/* hist_enlargebuf()
174 * Enlarge history buffer to specified value. Called from el_enlargebufs().
175 * Return 0 for failure, 1 for success.
176 */
177protected int
178/*ARGSUSED*/
179hist_enlargebuf(EditLine *el, size_t oldsz, size_t newsz)
180{
181 char *newbuf;
182
183 newbuf = realloc(el->el_history.buf, newsz);
184 if (!newbuf)
185 return 0;
186
187 (void) memset(&newbuf[oldsz], '\0', newsz - oldsz);
188
189 el->el_history.last = newbuf +
190 (el->el_history.last - el->el_history.buf);
191 el->el_history.buf = newbuf;
192 el->el_history.sz = newsz;
193
194 return 1;
195}