1 /* $NetBSD: literal.c,v 1.5 2019/07/23 13:10:11 christos Exp $ */
4 * Copyright (c) 2017 The NetBSD Foundation, Inc.
7 * This code is derived from software contributed to The NetBSD Foundation
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 #if !defined(lint) && !defined(SCCSID)
34 __RCSID("$NetBSD: literal.c,v 1.5 2019/07/23 13:10:11 christos Exp $");
35 #endif /* not lint && not SCCSID */
38 * literal.c: Literal sequences handling.
47 literal_init(EditLine *el)
49 el_literal_t *l = &el->el_literal;
51 memset(l, 0, sizeof(*l));
55 literal_end(EditLine *el)
61 literal_clear(EditLine *el)
63 el_literal_t *l = &el->el_literal;
69 for (i = 0; i < l->l_idx; i++)
77 libedit_private wint_t
78 literal_add(EditLine *el, const wchar_t *buf, const wchar_t *end, int *wp)
80 el_literal_t *l = &el->el_literal;
85 w = wcwidth(end[1]); /* column width of the visible char */
88 if (w <= 0) /* we require something to be printed */
91 len = (size_t)(end - buf);
92 for (w = 0, i = 0; i < len; i++)
93 w += ct_enc_width(buf[i]);
94 w += ct_enc_width(end[1]);
96 b = el_malloc((size_t)(w + 1));
100 for (n = 0, i = 0; i < len; i++)
101 n += ct_encode_char(b + n, (size_t)(w - n), buf[i]);
102 n += ct_encode_char(b + n, (size_t)(w - n), end[1]);
106 * Then save this literal string in the list of such strings,
107 * and return a "magic character" to put into the terminal buffer.
108 * When that magic char is 'printed' the saved string (which includes
109 * the char that belongs in that position) gets sent instead.
111 if (l->l_idx == l->l_len) {
115 bp = el_realloc(l->l_buf, sizeof(*l->l_buf) * l->l_len);
123 l->l_buf[l->l_idx++] = b;
124 return EL_LITERAL | (wint_t)(l->l_idx - 1);
127 libedit_private const char *
128 literal_get(EditLine *el, wint_t idx)
130 el_literal_t *l = &el->el_literal;
132 assert(idx & EL_LITERAL);
134 assert(l->l_idx > (size_t)idx);
135 return l->l_buf[idx];