171 lines
4.6 KiB
C
171 lines
4.6 KiB
C
/*-
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Christos Zoulas of Cornell University.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#if !defined(lint) && !defined(SCCSID)
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static char sccsid[] = "@(#)hist.c 8.1 (Berkeley) 6/4/93";
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#endif /* not lint && not SCCSID */
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/*
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* hist.c: History access functions
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*/
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#include "sys.h"
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#include <stdlib.h>
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#include "el.h"
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/* hist_init():
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* Initialization function.
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*/
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protected int
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hist_init(el)
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EditLine *el;
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{
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el->el_history.fun = NULL;
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el->el_history.ref = NULL;
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el->el_history.buf = (char *) el_malloc(EL_BUFSIZ);
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el->el_history.last = el->el_history.buf;
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return 0;
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}
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/* hist_end():
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* clean up history;
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*/
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protected void
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hist_end(el)
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EditLine *el;
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{
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el_free((ptr_t) el->el_history.buf);
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el->el_history.buf = NULL;
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}
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/* hist_set():
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* Set new history interface
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*/
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protected int
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hist_set(el, fun, ptr)
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EditLine *el;
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hist_fun_t fun;
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ptr_t ptr;
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{
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el->el_history.ref = ptr;
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el->el_history.fun = fun;
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return 0;
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}
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/* hist_get():
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* Get a history line and update it in the buffer.
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* eventno tells us the event to get.
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*/
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protected el_action_t
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hist_get(el)
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EditLine *el;
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{
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const char *hp;
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int h;
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if (el->el_history.eventno == 0) { /* if really the current line */
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(void) strncpy(el->el_line.buffer, el->el_history.buf, EL_BUFSIZ);
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el->el_line.lastchar = el->el_line.buffer +
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(el->el_history.last - el->el_history.buf);
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#ifdef KSHVI
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if (el->el_map.type == MAP_VI)
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el->el_line.cursor = el->el_line.buffer;
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else
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#endif /* KSHVI */
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el->el_line.cursor = el->el_line.lastchar;
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return CC_REFRESH;
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}
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if (el->el_history.ref == NULL)
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return CC_ERROR;
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hp = HIST_FIRST(el);
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if (hp == NULL)
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return CC_ERROR;
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for (h = 1; h < el->el_history.eventno; h++)
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if ((hp = HIST_NEXT(el)) == NULL) {
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el->el_history.eventno = h;
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return CC_ERROR;
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}
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(void) strncpy(el->el_line.buffer, hp, EL_BUFSIZ);
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el->el_line.lastchar = el->el_line.buffer + strlen(el->el_line.buffer);
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if (el->el_line.lastchar > el->el_line.buffer) {
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if (el->el_line.lastchar[-1] == '\n')
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el->el_line.lastchar--;
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if (el->el_line.lastchar[-1] == ' ')
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el->el_line.lastchar--;
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if (el->el_line.lastchar < el->el_line.buffer)
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el->el_line.lastchar = el->el_line.buffer;
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}
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#ifdef KSHVI
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if (el->el_map.type == MAP_VI)
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el->el_line.cursor = el->el_line.buffer;
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else
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#endif /* KSHVI */
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el->el_line.cursor = el->el_line.lastchar;
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return CC_REFRESH;
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}
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/* hist_list()
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* List history entries
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*/
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protected int
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/*ARGSUSED*/
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hist_list(el, argc, argv)
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EditLine *el;
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int argc;
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char **argv;
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{
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const char *str;
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if (el->el_history.ref == NULL)
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return -1;
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for (str = HIST_LAST(el); str != NULL; str = HIST_PREV(el))
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(void) fprintf(el->el_outfile, "%d %s", el->el_history.ev->num, str);
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return 0;
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}
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