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 $"); 41 #endif 42 #endif /* not lint && not SCCSID */ 43 #include <sys/cdefs.h> 44 __FBSDID("$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*/ 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*/ 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 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 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*/ 142 prompt_end(EditLine *el __attribute__((__unused__))) 143 { 144 } 145 146 147 /* prompt_set(): 148 * Install a prompt printing function 149 */ 150 protected int 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 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