1 /* $NetBSD: prompt.c,v 1.8 2001/01/10 07:45:41 jdolecek 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 <sys/cdefs.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 1.8 2001/01/10 07:45:41 jdolecek Exp $"); 45 #endif 46 #endif /* not lint && not SCCSID */ 47 48 /* 49 * prompt.c: Prompt printing functions 50 */ 51 #include "sys.h" 52 #include <stdio.h> 53 #include "el.h" 54 55 private char *prompt_default(EditLine *); 56 private char *prompt_default_r(EditLine *); 57 58 /* prompt_default(): 59 * Just a default prompt, in case the user did not provide one 60 */ 61 private char * 62 /*ARGSUSED*/ 63 prompt_default(EditLine *el) 64 { 65 static char a[3] = {'?', ' ', '\0'}; 66 67 return (a); 68 } 69 70 71 /* prompt_default_r(): 72 * Just a default rprompt, in case the user did not provide one 73 */ 74 private char * 75 /*ARGSUSED*/ 76 prompt_default_r(EditLine *el) 77 { 78 static char a[1] = {'\0'}; 79 80 return (a); 81 } 82 83 84 /* prompt_print(): 85 * Print the prompt and update the prompt position. 86 * We use an array of integers in case we want to pass 87 * literal escape sequences in the prompt and we want a 88 * bit to flag them 89 */ 90 protected void 91 prompt_print(EditLine *el, int op) 92 { 93 el_prompt_t *elp; 94 char *p; 95 96 if (op == EL_PROMPT) 97 elp = &el->el_prompt; 98 else 99 elp = &el->el_rprompt; 100 p = (elp->p_func) (el); 101 while (*p) 102 re_putc(el, *p++, 1); 103 104 elp->p_pos.v = el->el_refresh.r_cursor.v; 105 elp->p_pos.h = el->el_refresh.r_cursor.h; 106 } 107 108 109 /* prompt_init(): 110 * Initialize the prompt stuff 111 */ 112 protected int 113 prompt_init(EditLine *el) 114 { 115 116 el->el_prompt.p_func = prompt_default; 117 el->el_prompt.p_pos.v = 0; 118 el->el_prompt.p_pos.h = 0; 119 el->el_rprompt.p_func = prompt_default_r; 120 el->el_rprompt.p_pos.v = 0; 121 el->el_rprompt.p_pos.h = 0; 122 return (0); 123 } 124 125 126 /* prompt_end(): 127 * Clean up the prompt stuff 128 */ 129 protected void 130 /*ARGSUSED*/ 131 prompt_end(EditLine *el) 132 { 133 } 134 135 136 /* prompt_set(): 137 * Install a prompt printing function 138 */ 139 protected int 140 prompt_set(EditLine *el, el_pfunc_t prf, int op) 141 { 142 el_prompt_t *p; 143 144 if (op == EL_PROMPT) 145 p = &el->el_prompt; 146 else 147 p = &el->el_rprompt; 148 if (prf == NULL) { 149 if (op == EL_PROMPT) 150 p->p_func = prompt_default; 151 else 152 p->p_func = prompt_default_r; 153 } else 154 p->p_func = prf; 155 p->p_pos.v = 0; 156 p->p_pos.h = 0; 157 return (0); 158 } 159 160 161 /* prompt_get(): 162 * Retrieve the prompt printing function 163 */ 164 protected int 165 prompt_get(EditLine *el, el_pfunc_t *prf, int op) 166 { 167 168 if (prf == NULL) 169 return (-1); 170 if (op == EL_PROMPT) 171 *prf = el->el_prompt.p_func; 172 else 173 *prf = el->el_rprompt.p_func; 174 return (0); 175 } 176