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/* $NetBSD: literal.c,v 1.3.4.2 2017/07/23 14:41:26 snj Exp $ */
/*-
* Copyright (c) 2017 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Christos Zoulas.
*
* 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.
*
* 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)
__RCSID("$NetBSD: literal.c,v 1.3.4.2 2017/07/23 14:41:26 snj Exp $");
#endif /* not lint && not SCCSID */
/*
* literal.c: Literal sequences handling.
*/
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "el.h"
libedit_private void
literal_init(EditLine *el)
{
el_literal_t *l = &el->el_literal;
memset(l, 0, sizeof(*l));
}
libedit_private void
literal_end(EditLine *el)
{
literal_clear(el);
}
libedit_private void
literal_clear(EditLine *el)
{
el_literal_t *l = &el->el_literal;
size_t i;
if (l->l_len == 0)
return;
for (i = 0; i < l->l_idx; i++)
el_free(l->l_buf[i]);
el_free(l->l_buf);
l->l_buf = NULL;
l->l_len = 0;
l->l_idx = 0;
}
libedit_private wint_t
literal_add(EditLine *el, const wchar_t *buf, const wchar_t *end, int *wp)
{
el_literal_t *l = &el->el_literal;
size_t i, len;
ssize_t w, n;
char *b;
w = wcwidth(end[1]); /* column width of the visible char */
*wp = (int)w;
if (w <= 0) /* we require something to be printed */
return 0;
len = (size_t)(end - buf);
for (w = 0, i = 0; i < len; i++)
w += ct_enc_width(buf[i]);
w += ct_enc_width(end[1]);
b = el_malloc((size_t)(w + 1));
if (b == NULL)
return 0;
for (n = 0, i = 0; i < len; i++)
n += ct_encode_char(b + n, w - n, buf[i]);
n += ct_encode_char(b + n, w - n, end[1]);
b[n] = '\0';
/*
* Then save this literal string in the list of such strings,
* and return a "magic character" to put into the terminal buffer.
* When that magic char is 'printed' the saved string (which includes
* the char that belongs in that position) gets sent instead.
*/
if (l->l_idx == l->l_len) {
char **bp;
l->l_len += 4;
bp = el_realloc(l->l_buf, sizeof(*l->l_buf) * l->l_len);
if (bp == NULL) {
free(b);
l->l_len -= 4;
return 0;
}
l->l_buf = bp;
}
l->l_buf[l->l_idx++] = b;
return EL_LITERAL | (wint_t)(l->l_idx - 1);
}
libedit_private const char *
literal_get(EditLine *el, wint_t idx)
{
el_literal_t *l = &el->el_literal;
assert(idx & EL_LITERAL);
idx &= ~EL_LITERAL;
assert(l->l_idx > (size_t)idx);
return l->l_buf[idx];
}
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