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1 /*	$NetBSD: prompt.c,v 1.20 2011/07/29 15:16:33 christos Exp $	*/
2 
3 /*-
4  * Copyright (c) 1992, 1993
5  *	The Regents of the University of California.  All rights reserved.
6  *
7  * This code is derived from software contributed to Berkeley by
8  * Christos Zoulas of Cornell University.
9  *
10  * Redistribution and use in source and binary forms, with or without
11  * modification, are permitted provided that the following conditions
12  * are met:
13  * 1. Redistributions of source code must retain the above copyright
14  *    notice, this list of conditions and the following disclaimer.
15  * 2. Redistributions in binary form must reproduce the above copyright
16  *    notice, this list of conditions and the following disclaimer in the
17  *    documentation and/or other materials provided with the distribution.
18  * 3. Neither the name of the University nor the names of its contributors
19  *    may be used to endorse or promote products derived from this software
20  *    without specific prior written permission.
21  *
22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32  * SUCH DAMAGE.
33  */
34 
35 #include "config.h"
36 #if !defined(lint) && !defined(SCCSID)
37 #if 0
38 static char sccsid[] = "@(#)prompt.c	8.1 (Berkeley) 6/4/93";
39 #else
40 __RCSID("$NetBSD: prompt.c,v 1.20 2011/07/29 15:16:33 christos Exp $");
41 #endif
42 #endif /* not lint && not SCCSID */
43 
44 /*
45  * prompt.c: Prompt printing functions
46  */
47 #include <stdio.h>
48 #include "el.h"
49 
50 private Char	*prompt_default(EditLine *);
51 private Char	*prompt_default_r(EditLine *);
52 
53 /* prompt_default():
54  *	Just a default prompt, in case the user did not provide one
55  */
56 private Char *
57 /*ARGSUSED*/
prompt_default(EditLine * el)58 prompt_default(EditLine *el __attribute__((__unused__)))
59 {
60 	static Char a[3] = {'?', ' ', '\0'};
61 
62 	return a;
63 }
64 
65 
66 /* prompt_default_r():
67  *	Just a default rprompt, in case the user did not provide one
68  */
69 private Char *
70 /*ARGSUSED*/
prompt_default_r(EditLine * el)71 prompt_default_r(EditLine *el __attribute__((__unused__)))
72 {
73 	static Char a[1] = {'\0'};
74 
75 	return a;
76 }
77 
78 
79 /* prompt_print():
80  *	Print the prompt and update the prompt position.
81  */
82 protected void
prompt_print(EditLine * el,int op)83 prompt_print(EditLine *el, int op)
84 {
85 	el_prompt_t *elp;
86 	Char *p;
87 	int ignore = 0;
88 
89 	if (op == EL_PROMPT)
90 		elp = &el->el_prompt;
91 	else
92 		elp = &el->el_rprompt;
93 
94 	if (elp->p_wide)
95 		p = (*elp->p_func)(el);
96 	else
97 		p = ct_decode_string((char *)(void *)(*elp->p_func)(el),
98 		    &el->el_scratch);
99 
100 	for (; *p; p++) {
101 		if (elp->p_ignore == *p) {
102 			ignore = !ignore;
103 			continue;
104 		}
105 		if (ignore)
106 			terminal__putc(el, *p);
107 		else
108 			re_putc(el, *p, 1);
109 	}
110 
111 	elp->p_pos.v = el->el_refresh.r_cursor.v;
112 	elp->p_pos.h = el->el_refresh.r_cursor.h;
113 }
114 
115 
116 /* prompt_init():
117  *	Initialize the prompt stuff
118  */
119 protected int
prompt_init(EditLine * el)120 prompt_init(EditLine *el)
121 {
122 
123 	el->el_prompt.p_func = prompt_default;
124 	el->el_prompt.p_pos.v = 0;
125 	el->el_prompt.p_pos.h = 0;
126 	el->el_prompt.p_ignore = '\0';
127 	el->el_rprompt.p_func = prompt_default_r;
128 	el->el_rprompt.p_pos.v = 0;
129 	el->el_rprompt.p_pos.h = 0;
130 	el->el_rprompt.p_ignore = '\0';
131 	return 0;
132 }
133 
134 
135 /* prompt_end():
136  *	Clean up the prompt stuff
137  */
138 protected void
139 /*ARGSUSED*/
prompt_end(EditLine * el)140 prompt_end(EditLine *el __attribute__((__unused__)))
141 {
142 }
143 
144 
145 /* prompt_set():
146  *	Install a prompt printing function
147  */
148 protected int
prompt_set(EditLine * el,el_pfunc_t prf,Char c,int op,int wide)149 prompt_set(EditLine *el, el_pfunc_t prf, Char c, int op, int wide)
150 {
151 	el_prompt_t *p;
152 
153 	if (op == EL_PROMPT || op == EL_PROMPT_ESC)
154 		p = &el->el_prompt;
155 	else
156 		p = &el->el_rprompt;
157 
158 	if (prf == NULL) {
159 		if (op == EL_PROMPT || op == EL_PROMPT_ESC)
160 			p->p_func = prompt_default;
161 		else
162 			p->p_func = prompt_default_r;
163 	} else {
164 		p->p_func = prf;
165 	}
166 
167 	p->p_ignore = c;
168 
169 	p->p_pos.v = 0;
170 	p->p_pos.h = 0;
171 	p->p_wide = wide;
172 
173 	return 0;
174 }
175 
176 
177 /* prompt_get():
178  *	Retrieve the prompt printing function
179  */
180 protected int
prompt_get(EditLine * el,el_pfunc_t * prf,Char * c,int op)181 prompt_get(EditLine *el, el_pfunc_t *prf, Char *c, int op)
182 {
183 	el_prompt_t *p;
184 
185 	if (prf == NULL)
186 		return -1;
187 
188 	if (op == EL_PROMPT)
189 		p = &el->el_prompt;
190 	else
191 		p = &el->el_rprompt;
192 
193 	if (prf)
194 		*prf = p->p_func;
195 	if (c)
196 		*c = p->p_ignore;
197 
198 	return 0;
199 }
200