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