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 #endif
41 #endif /* not lint && not SCCSID */
42
43 /*
44 * prompt.c: Prompt printing functions
45 */
46 #include <stdio.h>
47 #include "el.h"
48
49 private Char *prompt_default(EditLine *);
50 private Char *prompt_default_r(EditLine *);
51
52 /* prompt_default():
53 * Just a default prompt, in case the user did not provide one
54 */
55 private Char *
56 /*ARGSUSED*/
prompt_default(EditLine * el)57 prompt_default(EditLine *el __attribute__((__unused__)))
58 {
59 static Char a[3] = {'?', ' ', '\0'};
60
61 return a;
62 }
63
64
65 /* prompt_default_r():
66 * Just a default rprompt, in case the user did not provide one
67 */
68 private Char *
69 /*ARGSUSED*/
prompt_default_r(EditLine * el)70 prompt_default_r(EditLine *el __attribute__((__unused__)))
71 {
72 static Char a[1] = {'\0'};
73
74 return a;
75 }
76
77
78 /* prompt_print():
79 * Print the prompt and update the prompt position.
80 */
81 protected void
prompt_print(EditLine * el,int op)82 prompt_print(EditLine *el, int op)
83 {
84 el_prompt_t *elp;
85 Char *p;
86 int ignore = 0;
87
88 if (op == EL_PROMPT)
89 elp = &el->el_prompt;
90 else
91 elp = &el->el_rprompt;
92
93 if (elp->p_wide)
94 p = (*elp->p_func)(el);
95 else
96 p = ct_decode_string((char *)(void *)(*elp->p_func)(el),
97 &el->el_scratch);
98
99 for (; *p; p++) {
100 if (elp->p_ignore == *p) {
101 ignore = !ignore;
102 continue;
103 }
104 if (ignore)
105 terminal__putc(el, *p);
106 else
107 re_putc(el, *p, 1);
108 }
109
110 elp->p_pos.v = el->el_refresh.r_cursor.v;
111 elp->p_pos.h = el->el_refresh.r_cursor.h;
112 }
113
114
115 /* prompt_init():
116 * Initialize the prompt stuff
117 */
118 protected int
prompt_init(EditLine * el)119 prompt_init(EditLine *el)
120 {
121
122 el->el_prompt.p_func = prompt_default;
123 el->el_prompt.p_pos.v = 0;
124 el->el_prompt.p_pos.h = 0;
125 el->el_prompt.p_ignore = '\0';
126 el->el_rprompt.p_func = prompt_default_r;
127 el->el_rprompt.p_pos.v = 0;
128 el->el_rprompt.p_pos.h = 0;
129 el->el_rprompt.p_ignore = '\0';
130 return 0;
131 }
132
133
134 /* prompt_end():
135 * Clean up the prompt stuff
136 */
137 protected void
138 /*ARGSUSED*/
prompt_end(EditLine * el)139 prompt_end(EditLine *el __attribute__((__unused__)))
140 {
141 }
142
143
144 /* prompt_set():
145 * Install a prompt printing function
146 */
147 protected int
prompt_set(EditLine * el,el_pfunc_t prf,Char c,int op,int wide)148 prompt_set(EditLine *el, el_pfunc_t prf, Char c, int op, int wide)
149 {
150 el_prompt_t *p;
151
152 if (op == EL_PROMPT || op == EL_PROMPT_ESC)
153 p = &el->el_prompt;
154 else
155 p = &el->el_rprompt;
156
157 if (prf == NULL) {
158 if (op == EL_PROMPT || op == EL_PROMPT_ESC)
159 p->p_func = prompt_default;
160 else
161 p->p_func = prompt_default_r;
162 } else {
163 p->p_func = prf;
164 }
165
166 p->p_ignore = c;
167
168 p->p_pos.v = 0;
169 p->p_pos.h = 0;
170 p->p_wide = wide;
171
172 return 0;
173 }
174
175
176 /* prompt_get():
177 * Retrieve the prompt printing function
178 */
179 protected int
prompt_get(EditLine * el,el_pfunc_t * prf,Char * c,int op)180 prompt_get(EditLine *el, el_pfunc_t *prf, Char *c, int op)
181 {
182 el_prompt_t *p;
183
184 if (prf == NULL)
185 return -1;
186
187 if (op == EL_PROMPT)
188 p = &el->el_prompt;
189 else
190 p = &el->el_rprompt;
191
192 if (prf)
193 *prf = p->p_func;
194 if (c)
195 *c = p->p_ignore;
196
197 return 0;
198 }
199