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*/ 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*/ 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 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 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*/ 140 prompt_end(EditLine *el __attribute__((__unused__))) 141 { 142 } 143 144 145 /* prompt_set(): 146 * Install a prompt printing function 147 */ 148 protected int 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 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