1 /* $NetBSD: prompt.c,v 1.11 2003/08/07 16:44:32 agc 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 1.11 2003/08/07 16:44:32 agc 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 91 if (op == EL_PROMPT) 92 elp = &el->el_prompt; 93 else 94 elp = &el->el_rprompt; 95 p = (elp->p_func) (el); 96 while (*p) 97 re_putc(el, *p++, 1); 98 99 elp->p_pos.v = el->el_refresh.r_cursor.v; 100 elp->p_pos.h = el->el_refresh.r_cursor.h; 101 } 102 103 104 /* prompt_init(): 105 * Initialize the prompt stuff 106 */ 107 protected int 108 prompt_init(EditLine *el) 109 { 110 111 el->el_prompt.p_func = prompt_default; 112 el->el_prompt.p_pos.v = 0; 113 el->el_prompt.p_pos.h = 0; 114 el->el_rprompt.p_func = prompt_default_r; 115 el->el_rprompt.p_pos.v = 0; 116 el->el_rprompt.p_pos.h = 0; 117 return (0); 118 } 119 120 121 /* prompt_end(): 122 * Clean up the prompt stuff 123 */ 124 protected void 125 /*ARGSUSED*/ 126 prompt_end(EditLine *el __attribute__((__unused__))) 127 { 128 } 129 130 131 /* prompt_set(): 132 * Install a prompt printing function 133 */ 134 protected int 135 prompt_set(EditLine *el, el_pfunc_t prf, int op) 136 { 137 el_prompt_t *p; 138 139 if (op == EL_PROMPT) 140 p = &el->el_prompt; 141 else 142 p = &el->el_rprompt; 143 if (prf == NULL) { 144 if (op == EL_PROMPT) 145 p->p_func = prompt_default; 146 else 147 p->p_func = prompt_default_r; 148 } else 149 p->p_func = prf; 150 p->p_pos.v = 0; 151 p->p_pos.h = 0; 152 return (0); 153 } 154 155 156 /* prompt_get(): 157 * Retrieve the prompt printing function 158 */ 159 protected int 160 prompt_get(EditLine *el, el_pfunc_t *prf, int op) 161 { 162 163 if (prf == NULL) 164 return (-1); 165 if (op == EL_PROMPT) 166 *prf = el->el_prompt.p_func; 167 else 168 *prf = el->el_rprompt.p_func; 169 return (0); 170 } 171