prompt.c revision 84260 
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#include <sys/cdefs.h>
40__FBSDID("$FreeBSD: head/lib/libedit/prompt.c 84260 2001-10-01 08:41:27Z obrien $");
41#if !defined(lint) && !defined(SCCSID)
42static char sccsid[] = "@(#)prompt.c	8.1 (Berkeley) 6/4/93";
43#endif /* not lint && not SCCSID */
44#include <sys/cdefs.h>
45__FBSDID("$FreeBSD: head/lib/libedit/prompt.c 84260 2001-10-01 08:41:27Z obrien $");
46
47/*
48 * prompt.c: Prompt printing functions
49 */
50#include "sys.h"
51#include <stdio.h>
52#include "el.h"
53
54private char	*prompt_default(EditLine *);
55private char	*prompt_default_r(EditLine *);
56
57/* prompt_default():
58 *	Just a default prompt, in case the user did not provide one
59 */
60private char *
61/*ARGSUSED*/
62prompt_default(EditLine *el)
63{
64	static char a[3] = {'?', ' ', '\0'};
65
66	return (a);
67}
68
69
70/* prompt_default_r():
71 *	Just a default rprompt, in case the user did not provide one
72 */
73private char *
74/*ARGSUSED*/
75prompt_default_r(EditLine *el)
76{
77	static char a[1] = {'\0'};
78
79	return (a);
80}
81
82
83/* prompt_print():
84 *	Print the prompt and update the prompt position.
85 *	We use an array of integers in case we want to pass
86 * 	literal escape sequences in the prompt and we want a
87 *	bit to flag them
88 */
89protected void
90prompt_print(EditLine *el, int op)
91{
92	el_prompt_t *elp;
93	char *p;
94
95	if (op == EL_PROMPT)
96		elp = &el->el_prompt;
97	else
98		elp = &el->el_rprompt;
99	p = (elp->p_func) (el);
100	while (*p)
101		re_putc(el, *p++, 1);
102
103	elp->p_pos.v = el->el_refresh.r_cursor.v;
104	elp->p_pos.h = el->el_refresh.r_cursor.h;
105}
106
107
108/* prompt_init():
109 *	Initialize the prompt stuff
110 */
111protected int
112prompt_init(EditLine *el)
113{
114
115	el->el_prompt.p_func = prompt_default;
116	el->el_prompt.p_pos.v = 0;
117	el->el_prompt.p_pos.h = 0;
118	el->el_rprompt.p_func = prompt_default_r;
119	el->el_rprompt.p_pos.v = 0;
120	el->el_rprompt.p_pos.h = 0;
121	return (0);
122}
123
124
125/* prompt_end():
126 *	Clean up the prompt stuff
127 */
128protected void
129/*ARGSUSED*/
130prompt_end(EditLine *el)
131{
132}
133
134
135/* prompt_set():
136 *	Install a prompt printing function
137 */
138protected int
139prompt_set(EditLine *el, el_pfunc_t prf, int op)
140{
141	el_prompt_t *p;
142
143	if (op == EL_PROMPT)
144		p = &el->el_prompt;
145	else
146		p = &el->el_rprompt;
147	if (prf == NULL) {
148		if (op == EL_PROMPT)
149			p->p_func = prompt_default;
150		else
151			p->p_func = prompt_default_r;
152	} else
153		p->p_func = prf;
154	p->p_pos.v = 0;
155	p->p_pos.h = 0;
156	return (0);
157}
158
159
160/* prompt_get():
161 *	Retrieve the prompt printing function
162 */
163protected int
164prompt_get(EditLine *el, el_pfunc_t *prf, int op)
165{
166
167	if (prf == NULL)
168		return (-1);
169	if (op == EL_PROMPT)
170		*prf = el->el_prompt.p_func;
171	else
172		*prf = el->el_rprompt.p_func;
173	return (0);
174}
175