prompt.c revision 84334 
1/*-
2 * Copyright (c) 1992, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Christos Zoulas of Cornell University.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 *    must display the following acknowledgement:
18 *	This product includes software developed by the University of
19 *	California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 *    may be used to endorse or promote products derived from this software
22 *    without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 *	$NetBSD: prompt.c,v 1.7 2000/09/04 22:06:31 lukem Exp $
37 */
38
39#if !defined(lint) && !defined(SCCSID)
40static char sccsid[] = "@(#)prompt.c	8.1 (Berkeley) 6/4/93";
41#endif /* not lint && not SCCSID */
42#include <sys/cdefs.h>
43__FBSDID("$FreeBSD: head/lib/libedit/prompt.c 84334 2001-10-01 23:00:29Z obrien $");
44
45/*
46 * prompt.c: Prompt printing functions
47 */
48#include "sys.h"
49#include <stdio.h>
50#include "el.h"
51
52private char	*prompt_default(EditLine *);
53private char	*prompt_default_r(EditLine *);
54
55/* prompt_default():
56 *	Just a default prompt, in case the user did not provide one
57 */
58private char *
59/*ARGSUSED*/
60prompt_default(EditLine *el)
61{
62	static char a[3] = {'?', ' ', '\0'};
63
64	return (a);
65}
66
67
68/* prompt_default_r():
69 *	Just a default rprompt, in case the user did not provide one
70 */
71private char *
72/*ARGSUSED*/
73prompt_default_r(EditLine *el)
74{
75	static char a[1] = {'\0'};
76
77	return (a);
78}
79
80
81/* prompt_print():
82 *	Print the prompt and update the prompt position.
83 *	We use an array of integers in case we want to pass
84 * 	literal escape sequences in the prompt and we want a
85 *	bit to flag them
86 */
87protected void
88prompt_print(EditLine *el, int op)
89{
90	el_prompt_t *elp;
91	char *p;
92
93	if (op == EL_PROMPT)
94		elp = &el->el_prompt;
95	else
96		elp = &el->el_rprompt;
97	p = (elp->p_func) (el);
98	while (*p)
99		re_putc(el, *p++, 1);
100
101	elp->p_pos.v = el->el_refresh.r_cursor.v;
102	elp->p_pos.h = el->el_refresh.r_cursor.h;
103}
104
105
106/* prompt_init():
107 *	Initialize the prompt stuff
108 */
109protected int
110prompt_init(EditLine *el)
111{
112
113	el->el_prompt.p_func = prompt_default;
114	el->el_prompt.p_pos.v = 0;
115	el->el_prompt.p_pos.h = 0;
116	el->el_rprompt.p_func = prompt_default_r;
117	el->el_rprompt.p_pos.v = 0;
118	el->el_rprompt.p_pos.h = 0;
119	return (0);
120}
121
122
123/* prompt_end():
124 *	Clean up the prompt stuff
125 */
126protected void
127/*ARGSUSED*/
128prompt_end(EditLine *el)
129{
130}
131
132
133/* prompt_set():
134 *	Install a prompt printing function
135 */
136protected int
137prompt_set(EditLine *el, el_pfunc_t prf, int op)
138{
139	el_prompt_t *p;
140
141	if (op == EL_PROMPT)
142		p = &el->el_prompt;
143	else
144		p = &el->el_rprompt;
145	if (prf == NULL) {
146		if (op == EL_PROMPT)
147			p->p_func = prompt_default;
148		else
149			p->p_func = prompt_default_r;
150	} else
151		p->p_func = prf;
152	p->p_pos.v = 0;
153	p->p_pos.h = 0;
154	return (0);
155}
156
157
158/* prompt_get():
159 *	Retrieve the prompt printing function
160 */
161protected int
162prompt_get(EditLine *el, el_pfunc_t *prf, int op)
163{
164
165	if (prf == NULL)
166		return (-1);
167	if (op == EL_PROMPT)
168		*prf = el->el_prompt.p_func;
169	else
170		*prf = el->el_rprompt.p_func;
171	return (0);
172}
173