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

1 files changed, 202 insertions, 0 deletions

diff --git a/bin/cash/libedit/prompt.c b/bin/cash/libedit/prompt.c
new file mode 100644
index 00000000..6a63f612
--- /dev/null
+++ b/bin/cash/libedit/prompt.c
@@ -0,0 +1,202 @@
+/*	$NetBSD: prompt.c,v 1.26.8.1 2017/07/23 14:41:26 snj Exp $	*/
+
+/*-
+ * Copyright (c) 1992, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Christos Zoulas of Cornell University.
+ *
+ * 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.
+ * 3. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * 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)
+#if 0
+static char sccsid[] = "@(#)prompt.c	8.1 (Berkeley) 6/4/93";
+#else
+__RCSID("$NetBSD: prompt.c,v 1.26.8.1 2017/07/23 14:41:26 snj Exp $");
+#endif
+#endif /* not lint && not SCCSID */
+
+/*
+ * prompt.c: Prompt printing functions
+ */
+#include <stdio.h>
+#include "el.h"
+
+static wchar_t	*prompt_default(EditLine *);
+static wchar_t	*prompt_default_r(EditLine *);
+
+/* prompt_default():
+ *	Just a default prompt, in case the user did not provide one
+ */
+static wchar_t *
+/*ARGSUSED*/
+prompt_default(EditLine *el __attribute__((__unused__)))
+{
+	static wchar_t a[3] = L"? ";
+
+	return a;
+}
+
+
+/* prompt_default_r():
+ *	Just a default rprompt, in case the user did not provide one
+ */
+static wchar_t *
+/*ARGSUSED*/
+prompt_default_r(EditLine *el __attribute__((__unused__)))
+{
+	static wchar_t a[1] = L"";
+
+	return a;
+}
+
+
+/* prompt_print():
+ *	Print the prompt and update the prompt position.
+ */
+libedit_private void
+prompt_print(EditLine *el, int op)
+{
+	el_prompt_t *elp;
+	wchar_t *p;
+
+	if (op == EL_PROMPT)
+		elp = &el->el_prompt;
+	else
+		elp = &el->el_rprompt;
+
+	if (elp->p_wide)
+		p = (*elp->p_func)(el);
+	else
+		p = ct_decode_string((char *)(void *)(*elp->p_func)(el),
+		    &el->el_scratch);
+
+	for (; *p; p++) {
+		if (elp->p_ignore == *p) {
+			wchar_t *litstart = ++p;
+			while (*p && *p != elp->p_ignore)
+				p++;
+			if (!*p || !p[1]) {
+				// XXX: We lose the last literal
+				break;
+			}
+			re_putliteral(el, litstart, p++);
+			continue;
+		}
+		re_putc(el, *p, 1);
+	}
+
+	elp->p_pos.v = el->el_refresh.r_cursor.v;
+	elp->p_pos.h = el->el_refresh.r_cursor.h;
+}
+
+
+/* prompt_init():
+ *	Initialize the prompt stuff
+ */
+libedit_private int
+prompt_init(EditLine *el)
+{
+
+	el->el_prompt.p_func = prompt_default;
+	el->el_prompt.p_pos.v = 0;
+	el->el_prompt.p_pos.h = 0;
+	el->el_prompt.p_ignore = '\0';
+	el->el_rprompt.p_func = prompt_default_r;
+	el->el_rprompt.p_pos.v = 0;
+	el->el_rprompt.p_pos.h = 0;
+	el->el_rprompt.p_ignore = '\0';
+	return 0;
+}
+
+
+/* prompt_end():
+ *	Clean up the prompt stuff
+ */
+libedit_private void
+/*ARGSUSED*/
+prompt_end(EditLine *el __attribute__((__unused__)))
+{
+}
+
+
+/* prompt_set():
+ *	Install a prompt printing function
+ */
+libedit_private int
+prompt_set(EditLine *el, el_pfunc_t prf, wchar_t c, int op, int wide)
+{
+	el_prompt_t *p;
+
+	if (op == EL_PROMPT || op == EL_PROMPT_ESC)
+		p = &el->el_prompt;
+	else
+		p = &el->el_rprompt;
+
+	if (prf == NULL) {
+		if (op == EL_PROMPT || op == EL_PROMPT_ESC)
+			p->p_func = prompt_default;
+		else
+			p->p_func = prompt_default_r;
+	} else {
+		p->p_func = prf;
+	}
+
+	p->p_ignore = c;
+
+	p->p_pos.v = 0;
+	p->p_pos.h = 0;
+	p->p_wide = wide;
+
+	return 0;
+}
+
+
+/* prompt_get():
+ *	Retrieve the prompt printing function
+ */
+libedit_private int
+prompt_get(EditLine *el, el_pfunc_t *prf, wchar_t *c, int op)
+{
+	el_prompt_t *p;
+
+	if (prf == NULL)
+		return -1;
+
+	if (op == EL_PROMPT)
+		p = &el->el_prompt;
+	else
+		p = &el->el_rprompt;
+
+	if (prf)
+		*prf = p->p_func;
+	if (c)
+		*c = p->p_ignore;
+
+	return 0;
+}