Import /usr/src/lib/libedit from NetBSD 8.0

1 files changed, 136 insertions, 0 deletions

diff --git a/bin/cash/libedit/literal.c b/bin/cash/libedit/literal.c
new file mode 100644
index 00000000..816dc3ce
--- /dev/null
+++ b/bin/cash/libedit/literal.c
@@ -0,0 +1,136 @@
+/*	$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];
+}