1 /* $NetBSD: prompt.c,v 1.23 2016/02/16 15:53:48 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 1.23 2016/02/16 15:53:48 christos Exp $");
41 #endif
42 #endif /* not lint && not SCCSID */
43 #include <sys/cdefs.h>
44 __FBSDID("$FreeBSD$");
45
46 /*
47 * prompt.c: Prompt printing functions
48 */
49 #include <stdio.h>
50 #include "el.h"
51
52 private Char *prompt_default(EditLine *);
53 private Char *prompt_default_r(EditLine *);
54
55 /* prompt_default():
56 * Just a default prompt, in case the user did not provide one
57 */
58 private Char *
59 /*ARGSUSED*/
prompt_default(EditLine * el)60 prompt_default(EditLine *el __attribute__((__unused__)))
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 */
71 private Char *
72 /*ARGSUSED*/
prompt_default_r(EditLine * el)73 prompt_default_r(EditLine *el __attribute__((__unused__)))
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 */
84 protected void
prompt_print(EditLine * el,int op)85 prompt_print(EditLine *el, int op)
86 {
87 el_prompt_t *elp;
88 Char *p;
89 int ignore = 0;
90
91 if (op == EL_PROMPT)
92 elp = &el->el_prompt;
93 else
94 elp = &el->el_rprompt;
95
96 if (elp->p_wide)
97 p = (*elp->p_func)(el);
98 else
99 p = ct_decode_string((char *)(void *)(*elp->p_func)(el),
100 &el->el_scratch);
101
102 for (; *p; p++) {
103 if (elp->p_ignore == *p) {
104 ignore = !ignore;
105 continue;
106 }
107 if (ignore)
108 terminal__putc(el, *p);
109 else
110 re_putc(el, *p, 1);
111 }
112
113 elp->p_pos.v = el->el_refresh.r_cursor.v;
114 elp->p_pos.h = el->el_refresh.r_cursor.h;
115 }
116
117
118 /* prompt_init():
119 * Initialize the prompt stuff
120 */
121 protected int
prompt_init(EditLine * el)122 prompt_init(EditLine *el)
123 {
124
125 el->el_prompt.p_func = prompt_default;
126 el->el_prompt.p_pos.v = 0;
127 el->el_prompt.p_pos.h = 0;
128 el->el_prompt.p_ignore = '\0';
129 el->el_rprompt.p_func = prompt_default_r;
130 el->el_rprompt.p_pos.v = 0;
131 el->el_rprompt.p_pos.h = 0;
132 el->el_rprompt.p_ignore = '\0';
133 return 0;
134 }
135
136
137 /* prompt_end():
138 * Clean up the prompt stuff
139 */
140 protected void
141 /*ARGSUSED*/
prompt_end(EditLine * el)142 prompt_end(EditLine *el __attribute__((__unused__)))
143 {
144 }
145
146
147 /* prompt_set():
148 * Install a prompt printing function
149 */
150 protected int
prompt_set(EditLine * el,el_pfunc_t prf,Char c,int op,int wide)151 prompt_set(EditLine *el, el_pfunc_t prf, Char c, int op, int wide)
152 {
153 el_prompt_t *p;
154
155 if (op == EL_PROMPT || op == EL_PROMPT_ESC)
156 p = &el->el_prompt;
157 else
158 p = &el->el_rprompt;
159
160 if (prf == NULL) {
161 if (op == EL_PROMPT || op == EL_PROMPT_ESC)
162 p->p_func = prompt_default;
163 else
164 p->p_func = prompt_default_r;
165 } else {
166 p->p_func = prf;
167 }
168
169 p->p_ignore = c;
170
171 p->p_pos.v = 0;
172 p->p_pos.h = 0;
173 p->p_wide = wide;
174
175 return 0;
176 }
177
178
179 /* prompt_get():
180 * Retrieve the prompt printing function
181 */
182 protected int
prompt_get(EditLine * el,el_pfunc_t * prf,Char * c,int op)183 prompt_get(EditLine *el, el_pfunc_t *prf, Char *c, int op)
184 {
185 el_prompt_t *p;
186
187 if (prf == NULL)
188 return -1;
189
190 if (op == EL_PROMPT)
191 p = &el->el_prompt;
192 else
193 p = &el->el_rprompt;
194
195 if (prf)
196 *prf = p->p_func;
197 if (c)
198 *c = p->p_ignore;
199
200 return 0;
201 }
202