1 /* $OpenBSD: prompt.c,v 1.14 2023/03/08 04:43:05 guenther Exp $ */
2 /* $NetBSD: prompt.c,v 1.25 2016/04/11 18:56:31 christos Exp $ */
3
4 /*-
5 * Copyright (c) 1992, 1993
6 * The Regents of the University of California. All rights reserved.
7 *
8 * This code is derived from software contributed to Berkeley by
9 * Christos Zoulas of Cornell University.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 */
35
36 #include "config.h"
37
38 /*
39 * prompt.c: Prompt printing functions
40 */
41 #include <stdio.h>
42 #include "el.h"
43
44 static wchar_t *prompt_default(EditLine *);
45 static wchar_t *prompt_default_r(EditLine *);
46
47 /* prompt_default():
48 * Just a default prompt, in case the user did not provide one
49 */
50 static wchar_t *
prompt_default(EditLine * el)51 prompt_default(EditLine *el __attribute__((__unused__)))
52 {
53 static wchar_t a[3] = L"? ";
54
55 return a;
56 }
57
58
59 /* prompt_default_r():
60 * Just a default rprompt, in case the user did not provide one
61 */
62 static wchar_t *
prompt_default_r(EditLine * el)63 prompt_default_r(EditLine *el __attribute__((__unused__)))
64 {
65 static wchar_t a[1] = L"";
66
67 return a;
68 }
69
70
71 /* prompt_print():
72 * Print the prompt and update the prompt position.
73 */
74 protected void
prompt_print(EditLine * el,int op)75 prompt_print(EditLine *el, int op)
76 {
77 el_prompt_t *elp;
78 wchar_t *p;
79 int ignore = 0;
80
81 if (op == EL_PROMPT)
82 elp = &el->el_prompt;
83 else
84 elp = &el->el_rprompt;
85
86 if (elp->p_wide)
87 p = (*elp->p_func)(el);
88 else
89 p = ct_decode_string((char *)(void *)(*elp->p_func)(el),
90 &el->el_scratch);
91
92 for (; *p; p++) {
93 if (elp->p_ignore == *p) {
94 ignore = !ignore;
95 continue;
96 }
97 if (ignore)
98 terminal__putc(el, *p);
99 else
100 re_putc(el, *p, 1);
101 }
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 */
111 protected int
prompt_init(EditLine * el)112 prompt_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_prompt.p_ignore = '\0';
119 el->el_rprompt.p_func = prompt_default_r;
120 el->el_rprompt.p_pos.v = 0;
121 el->el_rprompt.p_pos.h = 0;
122 el->el_rprompt.p_ignore = '\0';
123 return 0;
124 }
125
126
127 /* prompt_end():
128 * Clean up the prompt stuff
129 */
130 protected void
prompt_end(EditLine * el)131 prompt_end(EditLine *el __attribute__((__unused__)))
132 {
133 }
134
135
136 /* prompt_set():
137 * Install a prompt printing function
138 */
139 protected int
prompt_set(EditLine * el,el_pfunc_t prf,wchar_t c,int op,int wide)140 prompt_set(EditLine *el, el_pfunc_t prf, wchar_t c, int op, int wide)
141 {
142 el_prompt_t *p;
143
144 if (op == EL_PROMPT || op == EL_PROMPT_ESC)
145 p = &el->el_prompt;
146 else
147 p = &el->el_rprompt;
148
149 if (prf == NULL) {
150 if (op == EL_PROMPT || op == EL_PROMPT_ESC)
151 p->p_func = prompt_default;
152 else
153 p->p_func = prompt_default_r;
154 } else {
155 p->p_func = prf;
156 }
157
158 p->p_ignore = c;
159
160 p->p_pos.v = 0;
161 p->p_pos.h = 0;
162 p->p_wide = wide;
163
164 return 0;
165 }
166
167
168 /* prompt_get():
169 * Retrieve the prompt printing function
170 */
171 protected int
prompt_get(EditLine * el,el_pfunc_t * prf,wchar_t * c,int op)172 prompt_get(EditLine *el, el_pfunc_t *prf, wchar_t *c, int op)
173 {
174 el_prompt_t *p;
175
176 if (prf == NULL)
177 return -1;
178
179 if (op == EL_PROMPT)
180 p = &el->el_prompt;
181 else
182 p = &el->el_rprompt;
183
184 if (prf)
185 *prf = p->p_func;
186 if (c)
187 *c = p->p_ignore;
188
189 return 0;
190 }
191