1 /* $NetBSD: prompt.c,v 1.9 2002/03/18 16:00:56 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. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 */ 38 39 #include "config.h" 40 #if !defined(lint) && !defined(SCCSID) 41 #if 0 42 static char sccsid[] = "@(#)prompt.c 8.1 (Berkeley) 6/4/93"; 43 #else 44 __RCSID("$NetBSD: prompt.c,v 1.9 2002/03/18 16:00:56 christos Exp $"); 45 #endif 46 #endif /* not lint && not SCCSID */ 47 48 /* 49 * prompt.c: Prompt printing functions 50 */ 51 #include <stdio.h> 52 #include "el.h" 53 54 private char *prompt_default(EditLine *); 55 private char *prompt_default_r(EditLine *); 56 57 /* prompt_default(): 58 * Just a default prompt, in case the user did not provide one 59 */ 60 private char * 61 /*ARGSUSED*/ 62 prompt_default(EditLine *el) 63 { 64 static char a[3] = {'?', ' ', '\0'}; 65 66 return (a); 67 } 68 69 70 /* prompt_default_r(): 71 * Just a default rprompt, in case the user did not provide one 72 */ 73 private char * 74 /*ARGSUSED*/ 75 prompt_default_r(EditLine *el) 76 { 77 static char a[1] = {'\0'}; 78 79 return (a); 80 } 81 82 83 /* prompt_print(): 84 * Print the prompt and update the prompt position. 85 * We use an array of integers in case we want to pass 86 * literal escape sequences in the prompt and we want a 87 * bit to flag them 88 */ 89 protected void 90 prompt_print(EditLine *el, int op) 91 { 92 el_prompt_t *elp; 93 char *p; 94 95 if (op == EL_PROMPT) 96 elp = &el->el_prompt; 97 else 98 elp = &el->el_rprompt; 99 p = (elp->p_func) (el); 100 while (*p) 101 re_putc(el, *p++, 1); 102 103 elp->p_pos.v = el->el_refresh.r_cursor.v; 104 elp->p_pos.h = el->el_refresh.r_cursor.h; 105 } 106 107 108 /* prompt_init(): 109 * Initialize the prompt stuff 110 */ 111 protected int 112 prompt_init(EditLine *el) 113 { 114 115 el->el_prompt.p_func = prompt_default; 116 el->el_prompt.p_pos.v = 0; 117 el->el_prompt.p_pos.h = 0; 118 el->el_rprompt.p_func = prompt_default_r; 119 el->el_rprompt.p_pos.v = 0; 120 el->el_rprompt.p_pos.h = 0; 121 return (0); 122 } 123 124 125 /* prompt_end(): 126 * Clean up the prompt stuff 127 */ 128 protected void 129 /*ARGSUSED*/ 130 prompt_end(EditLine *el) 131 { 132 } 133 134 135 /* prompt_set(): 136 * Install a prompt printing function 137 */ 138 protected int 139 prompt_set(EditLine *el, el_pfunc_t prf, int op) 140 { 141 el_prompt_t *p; 142 143 if (op == EL_PROMPT) 144 p = &el->el_prompt; 145 else 146 p = &el->el_rprompt; 147 if (prf == NULL) { 148 if (op == EL_PROMPT) 149 p->p_func = prompt_default; 150 else 151 p->p_func = prompt_default_r; 152 } else 153 p->p_func = prf; 154 p->p_pos.v = 0; 155 p->p_pos.h = 0; 156 return (0); 157 } 158 159 160 /* prompt_get(): 161 * Retrieve the prompt printing function 162 */ 163 protected int 164 prompt_get(EditLine *el, el_pfunc_t *prf, int op) 165 { 166 167 if (prf == NULL) 168 return (-1); 169 if (op == EL_PROMPT) 170 *prf = el->el_prompt.p_func; 171 else 172 *prf = el->el_rprompt.p_func; 173 return (0); 174 } 175