2 * Copyright (c) 1992, 1993
3 * The Regents of the University of California. All rights reserved.
5 * This code is derived from software contributed to Berkeley by
6 * Christos Zoulas of Cornell University.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
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.
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
37 #if !defined(lint) && !defined(SCCSID)
38 static char sccsid[] = "@(#)hist.c 8.1 (Berkeley) 6/4/93";
39 #endif /* not lint && not SCCSID */
42 * hist.c: History access functions
49 * Initialization function.
55 el->el_history.fun = NULL;
56 el->el_history.ref = NULL;
57 el->el_history.buf = (char *) el_malloc(EL_BUFSIZ);
58 el->el_history.last = el->el_history.buf;
70 el_free((ptr_t) el->el_history.buf);
71 el->el_history.buf = NULL;
76 * Set new history interface
79 hist_set(el, fun, ptr)
85 el->el_history.ref = ptr;
86 el->el_history.fun = fun;
92 * Get a history line and update it in the buffer.
93 * eventno tells us the event to get.
102 if (el->el_history.eventno == 0) { /* if really the current line */
103 (void) strncpy(el->el_line.buffer, el->el_history.buf, EL_BUFSIZ);
104 el->el_line.lastchar = el->el_line.buffer +
105 (el->el_history.last - el->el_history.buf);
108 if (el->el_map.type == MAP_VI)
109 el->el_line.cursor = el->el_line.buffer;
112 el->el_line.cursor = el->el_line.lastchar;
117 if (el->el_history.ref == NULL)
125 for (h = 1; h < el->el_history.eventno; h++)
126 if ((hp = HIST_NEXT(el)) == NULL) {
127 el->el_history.eventno = h;
131 (void) strncpy(el->el_line.buffer, hp, EL_BUFSIZ);
132 el->el_line.lastchar = el->el_line.buffer + strlen(el->el_line.buffer);
134 if (el->el_line.lastchar > el->el_line.buffer) {
135 if (el->el_line.lastchar[-1] == '\n')
136 el->el_line.lastchar--;
137 if (el->el_line.lastchar[-1] == ' ')
138 el->el_line.lastchar--;
139 if (el->el_line.lastchar < el->el_line.buffer)
140 el->el_line.lastchar = el->el_line.buffer;
144 if (el->el_map.type == MAP_VI)
145 el->el_line.cursor = el->el_line.buffer;
148 el->el_line.cursor = el->el_line.lastchar;
154 * List history entries
158 hist_list(el, argc, argv)
165 if (el->el_history.ref == NULL)
167 for (str = HIST_LAST(el); str != NULL; str = HIST_PREV(el))
168 (void) fprintf(el->el_outfile, "%d %s", el->el_history.ev->num, str);