1 /* $NetBSD: prompt.c,v 1.15 2009/04/16 19:39:37 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 1.15 2009/04/16 19:39:37 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 * We use an array of integers in case we want to pass 82 * literal escape sequences in the prompt and we want a 83 * bit to flag them 84 */ 85 protected void 86 prompt_print(EditLine *el, int op) 87 { 88 el_prompt_t *elp; 89 char *p; 90 int ignore = 0; 91 92 if (op == EL_PROMPT) 93 elp = &el->el_prompt; 94 else 95 elp = &el->el_rprompt; 96 97 for (p = (*elp->p_func)(el); *p; p++) { 98 if (elp->p_ignore == *p) { 99 ignore = !ignore; 100 continue; 101 } 102 if (ignore) 103 term__putc(el, *p); 104 else 105 re_putc(el, *p, 1); 106 } 107 108 elp->p_pos.v = el->el_refresh.r_cursor.v; 109 elp->p_pos.h = el->el_refresh.r_cursor.h; 110 } 111 112 113 /* prompt_init(): 114 * Initialize the prompt stuff 115 */ 116 protected int 117 prompt_init(EditLine *el) 118 { 119 120 el->el_prompt.p_func = prompt_default; 121 el->el_prompt.p_pos.v = 0; 122 el->el_prompt.p_pos.h = 0; 123 el->el_prompt.p_ignore = '\0'; 124 el->el_rprompt.p_func = prompt_default_r; 125 el->el_rprompt.p_pos.v = 0; 126 el->el_rprompt.p_pos.h = 0; 127 el->el_rprompt.p_ignore = '\0'; 128 return 0; 129 } 130 131 132 /* prompt_end(): 133 * Clean up the prompt stuff 134 */ 135 protected void 136 /*ARGSUSED*/ 137 prompt_end(EditLine *el __attribute__((__unused__))) 138 { 139 } 140 141 142 /* prompt_set(): 143 * Install a prompt printing function 144 */ 145 protected int 146 prompt_set(EditLine *el, el_pfunc_t prf, char c, int op) 147 { 148 el_prompt_t *p; 149 150 if (op == EL_PROMPT) 151 p = &el->el_prompt; 152 else 153 p = &el->el_rprompt; 154 155 if (prf == NULL) { 156 if (op == EL_PROMPT) 157 p->p_func = prompt_default; 158 else 159 p->p_func = prompt_default_r; 160 } else 161 p->p_func = prf; 162 163 p->p_ignore = c; 164 165 p->p_pos.v = 0; 166 p->p_pos.h = 0; 167 168 return 0; 169 } 170 171 172 /* prompt_get(): 173 * Retrieve the prompt printing function 174 */ 175 protected int 176 prompt_get(EditLine *el, el_pfunc_t *prf, char *c, int op) 177 { 178 el_prompt_t *p; 179 180 if (prf == NULL) 181 return -1; 182 183 if (op == EL_PROMPT) 184 p = &el->el_prompt; 185 else 186 p = &el->el_rprompt; 187 188 *prf = el->el_rprompt.p_func; 189 190 if (c) 191 *c = p->p_ignore; 192 193 return 0; 194 } 195