prompt.c revision 1574 
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
37#if !defined(lint) && !defined(SCCSID)
38static char sccsid[] = "@(#)prompt.c	8.1 (Berkeley) 6/4/93";
39#endif /* not lint && not SCCSID */
40
41/*
42 * prompt.c: Prompt printing functions
43 */
44#include "sys.h"
45#include <stdio.h>
46#include "el.h"
47
48private char *prompt_default	__P((EditLine *));
49
50/* prompt_default():
51 *	Just a default prompt, in case the user did not provide one
52 */
53private char *
54/*ARGSUSED*/
55prompt_default(el)
56    EditLine *el;
57{
58    static char a[3] = { '?', ' ', '\0' };
59    return a;
60}
61
62
63/* prompt_print():
64 *	Print the prompt and update the prompt position.
65 *	We use an array of integers in case we want to pass
66 * 	literal escape sequences in the prompt and we want a
67 *	bit to flag them
68 */
69protected void
70prompt_print(el)
71    EditLine *el;
72{
73    char *p = (*el->el_prompt.p_func)(el);
74    while (*p)
75	re_putc(el, *p++);
76
77    el->el_prompt.p_pos.v = el->el_refresh.r_cursor.v;
78    el->el_prompt.p_pos.h = el->el_refresh.r_cursor.h;
79
80} /* end prompt_print */
81
82
83/* prompt_init():
84 *	Initialize the prompt stuff
85 */
86protected int
87prompt_init(el)
88    EditLine *el;
89{
90    el->el_prompt.p_func = prompt_default;
91    el->el_prompt.p_pos.v = 0;
92    el->el_prompt.p_pos.h = 0;
93    return 0;
94} /* end prompt_init */
95
96
97/* prompt_end():
98 *	Clean up the prompt stuff
99 */
100protected void
101/*ARGSUSED*/
102prompt_end(el)
103    EditLine *el;
104{
105} /* end prompt_end */
106
107
108/* prompt_set():
109 *	Install a prompt printing function
110 */
111protected int
112prompt_set(el, prf)
113    EditLine *el;
114    el_pfunc_t prf;
115{
116    if (prf == NULL)
117	el->el_prompt.p_func = prompt_default;
118    else
119	el->el_prompt.p_func = prf;
120    el->el_prompt.p_pos.v = 0;
121    el->el_prompt.p_pos.h = 0;
122    return 0;
123} /* end prompt_set */
124