253 lines
6.3 KiB
C
253 lines
6.3 KiB
C
/* $NetBSD: hist.c,v 1.34 2019/07/23 10:19:35 christos Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 1992, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to Berkeley by
|
|
* Christos Zoulas of Cornell University.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#include "config.h"
|
|
#if !defined(lint) && !defined(SCCSID)
|
|
#if 0
|
|
static char sccsid[] = "@(#)hist.c 8.1 (Berkeley) 6/4/93";
|
|
#else
|
|
__RCSID("$NetBSD: hist.c,v 1.34 2019/07/23 10:19:35 christos Exp $");
|
|
#endif
|
|
#endif /* not lint && not SCCSID */
|
|
|
|
/*
|
|
* hist.c: History access functions
|
|
*/
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <vis.h>
|
|
|
|
#include "el.h"
|
|
|
|
/* hist_init():
|
|
* Initialization function.
|
|
*/
|
|
libedit_private int
|
|
hist_init(EditLine *el)
|
|
{
|
|
|
|
el->el_history.fun = NULL;
|
|
el->el_history.ref = NULL;
|
|
el->el_history.buf = el_calloc(EL_BUFSIZ, sizeof(*el->el_history.buf));
|
|
if (el->el_history.buf == NULL)
|
|
return -1;
|
|
el->el_history.sz = EL_BUFSIZ;
|
|
el->el_history.last = el->el_history.buf;
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* hist_end():
|
|
* clean up history;
|
|
*/
|
|
libedit_private void
|
|
hist_end(EditLine *el)
|
|
{
|
|
|
|
el_free(el->el_history.buf);
|
|
el->el_history.buf = NULL;
|
|
}
|
|
|
|
|
|
/* hist_set():
|
|
* Set new history interface
|
|
*/
|
|
libedit_private int
|
|
hist_set(EditLine *el, hist_fun_t fun, void *ptr)
|
|
{
|
|
|
|
el->el_history.ref = ptr;
|
|
el->el_history.fun = fun;
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* hist_get():
|
|
* Get a history line and update it in the buffer.
|
|
* eventno tells us the event to get.
|
|
*/
|
|
libedit_private el_action_t
|
|
hist_get(EditLine *el)
|
|
{
|
|
const wchar_t *hp;
|
|
int h;
|
|
size_t blen, hlen;
|
|
|
|
if (el->el_history.eventno == 0) { /* if really the current line */
|
|
(void) wcsncpy(el->el_line.buffer, el->el_history.buf,
|
|
el->el_history.sz);
|
|
el->el_line.lastchar = el->el_line.buffer +
|
|
(el->el_history.last - el->el_history.buf);
|
|
|
|
#ifdef KSHVI
|
|
if (el->el_map.type == MAP_VI)
|
|
el->el_line.cursor = el->el_line.buffer;
|
|
else
|
|
#endif /* KSHVI */
|
|
el->el_line.cursor = el->el_line.lastchar;
|
|
|
|
return CC_REFRESH;
|
|
}
|
|
if (el->el_history.ref == NULL)
|
|
return CC_ERROR;
|
|
|
|
hp = HIST_FIRST(el);
|
|
|
|
if (hp == NULL)
|
|
return CC_ERROR;
|
|
|
|
for (h = 1; h < el->el_history.eventno; h++)
|
|
if ((hp = HIST_NEXT(el)) == NULL)
|
|
goto out;
|
|
|
|
hlen = wcslen(hp) + 1;
|
|
blen = (size_t)(el->el_line.limit - el->el_line.buffer);
|
|
if (hlen > blen && !ch_enlargebufs(el, hlen))
|
|
goto out;
|
|
|
|
memcpy(el->el_line.buffer, hp, hlen * sizeof(*hp));
|
|
el->el_line.lastchar = el->el_line.buffer + hlen - 1;
|
|
|
|
if (el->el_line.lastchar > el->el_line.buffer
|
|
&& el->el_line.lastchar[-1] == '\n')
|
|
el->el_line.lastchar--;
|
|
if (el->el_line.lastchar > el->el_line.buffer
|
|
&& el->el_line.lastchar[-1] == ' ')
|
|
el->el_line.lastchar--;
|
|
#ifdef KSHVI
|
|
if (el->el_map.type == MAP_VI)
|
|
el->el_line.cursor = el->el_line.buffer;
|
|
else
|
|
#endif /* KSHVI */
|
|
el->el_line.cursor = el->el_line.lastchar;
|
|
|
|
return CC_REFRESH;
|
|
out:
|
|
el->el_history.eventno = h;
|
|
return CC_ERROR;
|
|
|
|
}
|
|
|
|
|
|
/* hist_command()
|
|
* process a history command
|
|
*/
|
|
libedit_private int
|
|
hist_command(EditLine *el, int argc, const wchar_t **argv)
|
|
{
|
|
const wchar_t *str;
|
|
int num;
|
|
HistEventW ev;
|
|
|
|
if (el->el_history.ref == NULL)
|
|
return -1;
|
|
|
|
if (argc == 1 || wcscmp(argv[1], L"list") == 0) {
|
|
size_t maxlen = 0;
|
|
char *buf = NULL;
|
|
int hno = 1;
|
|
/* List history entries */
|
|
|
|
for (str = HIST_LAST(el); str != NULL; str = HIST_PREV(el)) {
|
|
char *ptr =
|
|
ct_encode_string(str, &el->el_scratch);
|
|
size_t len = strlen(ptr);
|
|
if (len > 0 && ptr[len - 1] == '\n')
|
|
ptr[--len] = '\0';
|
|
len = len * 4 + 1;
|
|
if (len >= maxlen) {
|
|
maxlen = len + 1024;
|
|
char *nbuf = el_realloc(buf, maxlen);
|
|
if (nbuf == NULL) {
|
|
el_free(buf);
|
|
return -1;
|
|
}
|
|
buf = nbuf;
|
|
}
|
|
strvis(buf, ptr, VIS_NL);
|
|
(void) fprintf(el->el_outfile, "%d\t%s\n",
|
|
hno++, buf);
|
|
}
|
|
el_free(buf);
|
|
return 0;
|
|
}
|
|
|
|
if (argc != 3)
|
|
return -1;
|
|
|
|
num = (int)wcstol(argv[2], NULL, 0);
|
|
|
|
if (wcscmp(argv[1], L"size") == 0)
|
|
return history_w(el->el_history.ref, &ev, H_SETSIZE, num);
|
|
|
|
if (wcscmp(argv[1], L"unique") == 0)
|
|
return history_w(el->el_history.ref, &ev, H_SETUNIQUE, num);
|
|
|
|
return -1;
|
|
}
|
|
|
|
/* hist_enlargebuf()
|
|
* Enlarge history buffer to specified value. Called from el_enlargebufs().
|
|
* Return 0 for failure, 1 for success.
|
|
*/
|
|
libedit_private int
|
|
/*ARGSUSED*/
|
|
hist_enlargebuf(EditLine *el, size_t oldsz, size_t newsz)
|
|
{
|
|
wchar_t *newbuf;
|
|
|
|
newbuf = el_realloc(el->el_history.buf, newsz * sizeof(*newbuf));
|
|
if (!newbuf)
|
|
return 0;
|
|
|
|
(void) memset(&newbuf[oldsz], '\0', (newsz - oldsz) * sizeof(*newbuf));
|
|
|
|
el->el_history.last = newbuf +
|
|
(el->el_history.last - el->el_history.buf);
|
|
el->el_history.buf = newbuf;
|
|
el->el_history.sz = newsz;
|
|
|
|
return 1;
|
|
}
|
|
|
|
libedit_private wchar_t *
|
|
hist_convert(EditLine *el, int fn, void *arg)
|
|
{
|
|
HistEventW ev;
|
|
if ((*(el)->el_history.fun)((el)->el_history.ref, &ev, fn, arg) == -1)
|
|
return NULL;
|
|
return ct_decode_string((const char *)(const void *)ev.str,
|
|
&el->el_scratch);
|
|
}
|