d0ef721ed3
Compared to current version in base: - great improvements on the Unicode support - full support for filename completion including quoting which means we do not need anymore our custom addition) - Improved readline compatiblity Upgrading libedit has been a pain in the past, because somehow we never managed to properly cleanup the tree in lib/libedit and each merge has always been very painful. After years of fighting give up and refresh a merge from scrarch properly in contrib. Note that the switch to this version will be done in another commit.
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 $ */
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/*-
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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. 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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#include "config.h"
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#if !defined(lint) && !defined(SCCSID)
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#if 0
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static char sccsid[] = "@(#)hist.c 8.1 (Berkeley) 6/4/93";
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#else
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__RCSID("$NetBSD: hist.c,v 1.34 2019/07/23 10:19:35 christos Exp $");
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#endif
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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 <stdlib.h>
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#include <string.h>
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#include <vis.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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libedit_private int
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hist_init(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 = el_calloc(EL_BUFSIZ, sizeof(*el->el_history.buf));
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if (el->el_history.buf == NULL)
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return -1;
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el->el_history.sz = 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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libedit_private void
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hist_end(EditLine *el)
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{
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el_free(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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libedit_private int
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hist_set(EditLine *el, hist_fun_t fun, void *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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libedit_private el_action_t
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hist_get(EditLine *el)
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{
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const wchar_t *hp;
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int h;
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size_t blen, hlen;
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if (el->el_history.eventno == 0) { /* if really the current line */
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(void) wcsncpy(el->el_line.buffer, el->el_history.buf,
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el->el_history.sz);
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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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goto out;
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hlen = wcslen(hp) + 1;
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blen = (size_t)(el->el_line.limit - el->el_line.buffer);
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if (hlen > blen && !ch_enlargebufs(el, hlen))
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goto out;
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memcpy(el->el_line.buffer, hp, hlen * sizeof(*hp));
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el->el_line.lastchar = el->el_line.buffer + hlen - 1;
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if (el->el_line.lastchar > el->el_line.buffer
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&& el->el_line.lastchar[-1] == '\n')
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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[-1] == ' ')
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el->el_line.lastchar--;
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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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out:
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el->el_history.eventno = h;
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return CC_ERROR;
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}
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/* hist_command()
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* process a history command
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*/
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libedit_private int
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hist_command(EditLine *el, int argc, const wchar_t **argv)
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{
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const wchar_t *str;
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int num;
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HistEventW ev;
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if (el->el_history.ref == NULL)
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return -1;
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if (argc == 1 || wcscmp(argv[1], L"list") == 0) {
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size_t maxlen = 0;
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char *buf = NULL;
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int hno = 1;
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/* List history entries */
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for (str = HIST_LAST(el); str != NULL; str = HIST_PREV(el)) {
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char *ptr =
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ct_encode_string(str, &el->el_scratch);
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size_t len = strlen(ptr);
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if (len > 0 && ptr[len - 1] == '\n')
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ptr[--len] = '\0';
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len = len * 4 + 1;
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if (len >= maxlen) {
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maxlen = len + 1024;
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char *nbuf = el_realloc(buf, maxlen);
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if (nbuf == NULL) {
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el_free(buf);
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return -1;
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}
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buf = nbuf;
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}
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strvis(buf, ptr, VIS_NL);
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(void) fprintf(el->el_outfile, "%d\t%s\n",
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hno++, buf);
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}
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el_free(buf);
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return 0;
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}
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if (argc != 3)
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return -1;
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num = (int)wcstol(argv[2], NULL, 0);
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if (wcscmp(argv[1], L"size") == 0)
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return history_w(el->el_history.ref, &ev, H_SETSIZE, num);
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if (wcscmp(argv[1], L"unique") == 0)
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return history_w(el->el_history.ref, &ev, H_SETUNIQUE, num);
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return -1;
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}
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/* hist_enlargebuf()
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* Enlarge history buffer to specified value. Called from el_enlargebufs().
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* Return 0 for failure, 1 for success.
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*/
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libedit_private int
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/*ARGSUSED*/
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hist_enlargebuf(EditLine *el, size_t oldsz, size_t newsz)
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{
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wchar_t *newbuf;
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newbuf = el_realloc(el->el_history.buf, newsz * sizeof(*newbuf));
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if (!newbuf)
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return 0;
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(void) memset(&newbuf[oldsz], '\0', (newsz - oldsz) * sizeof(*newbuf));
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el->el_history.last = newbuf +
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(el->el_history.last - el->el_history.buf);
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el->el_history.buf = newbuf;
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el->el_history.sz = newsz;
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return 1;
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}
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libedit_private wchar_t *
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hist_convert(EditLine *el, int fn, void *arg)
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{
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HistEventW ev;
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if ((*(el)->el_history.fun)((el)->el_history.ref, &ev, fn, arg) == -1)
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return NULL;
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return ct_decode_string((const char *)(const void *)ev.str,
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&el->el_scratch);
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}
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