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.
137 lines
3.6 KiB
C
137 lines
3.6 KiB
C
/* $NetBSD: literal.c,v 1.5 2019/07/23 13:10:11 christos Exp $ */
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/*-
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* Copyright (c) 2017 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Christos Zoulas.
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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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*
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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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__RCSID("$NetBSD: literal.c,v 1.5 2019/07/23 13:10:11 christos Exp $");
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#endif /* not lint && not SCCSID */
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/*
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* literal.c: Literal sequences handling.
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*/
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#include <assert.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "el.h"
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libedit_private void
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literal_init(EditLine *el)
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{
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el_literal_t *l = &el->el_literal;
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memset(l, 0, sizeof(*l));
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}
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libedit_private void
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literal_end(EditLine *el)
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{
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literal_clear(el);
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}
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libedit_private void
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literal_clear(EditLine *el)
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{
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el_literal_t *l = &el->el_literal;
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size_t i;
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if (l->l_len == 0)
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return;
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for (i = 0; i < l->l_idx; i++)
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el_free(l->l_buf[i]);
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el_free(l->l_buf);
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l->l_buf = NULL;
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l->l_len = 0;
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l->l_idx = 0;
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}
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libedit_private wint_t
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literal_add(EditLine *el, const wchar_t *buf, const wchar_t *end, int *wp)
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{
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el_literal_t *l = &el->el_literal;
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size_t i, len;
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ssize_t w, n;
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char *b;
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w = wcwidth(end[1]); /* column width of the visible char */
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*wp = (int)w;
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if (w <= 0) /* we require something to be printed */
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return 0;
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len = (size_t)(end - buf);
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for (w = 0, i = 0; i < len; i++)
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w += ct_enc_width(buf[i]);
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w += ct_enc_width(end[1]);
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b = el_malloc((size_t)(w + 1));
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if (b == NULL)
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return 0;
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for (n = 0, i = 0; i < len; i++)
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n += ct_encode_char(b + n, (size_t)(w - n), buf[i]);
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n += ct_encode_char(b + n, (size_t)(w - n), end[1]);
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b[n] = '\0';
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/*
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* Then save this literal string in the list of such strings,
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* and return a "magic character" to put into the terminal buffer.
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* When that magic char is 'printed' the saved string (which includes
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* the char that belongs in that position) gets sent instead.
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*/
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if (l->l_idx == l->l_len) {
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char **bp;
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l->l_len += 4;
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bp = el_realloc(l->l_buf, sizeof(*l->l_buf) * l->l_len);
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if (bp == NULL) {
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free(b);
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l->l_len -= 4;
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return 0;
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}
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l->l_buf = bp;
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}
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l->l_buf[l->l_idx++] = b;
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return EL_LITERAL | (wint_t)(l->l_idx - 1);
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}
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libedit_private const char *
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literal_get(EditLine *el, wint_t idx)
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{
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el_literal_t *l = &el->el_literal;
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assert(idx & EL_LITERAL);
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idx &= ~EL_LITERAL;
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assert(l->l_idx > (size_t)idx);
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return l->l_buf[idx];
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}
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