1 /* $NetBSD: prompt.c,v 1.6 1999/11/12 01:05:07 lukem 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 1.6 1999/11/12 01:05:07 lukem 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 __P((EditLine *)); 56 private char *prompt_default_r __P((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(el) 64 EditLine *el; 65 { 66 static char a[3] = { '?', ' ', '\0' }; 67 return a; 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(el) 76 EditLine *el; 77 { 78 static char a[1] = { '\0' }; 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(el, op) 91 EditLine *el; 92 int op; 93 { 94 el_prompt_t *elp; 95 char *p; 96 97 if (op == EL_PROMPT) 98 elp = &el->el_prompt; 99 else 100 elp = &el->el_rprompt; 101 p = (elp->p_func)(el); 102 while (*p) 103 re_putc(el, *p++); 104 105 elp->p_pos.v = el->el_refresh.r_cursor.v; 106 elp->p_pos.h = el->el_refresh.r_cursor.h; 107 } /* end prompt_print */ 108 109 110 /* prompt_init(): 111 * Initialize the prompt stuff 112 */ 113 protected int 114 prompt_init(el) 115 EditLine *el; 116 { 117 el->el_prompt.p_func = prompt_default; 118 el->el_prompt.p_pos.v = 0; 119 el->el_prompt.p_pos.h = 0; 120 el->el_rprompt.p_func = prompt_default_r; 121 el->el_rprompt.p_pos.v = 0; 122 el->el_rprompt.p_pos.h = 0; 123 return 0; 124 } /* end prompt_init */ 125 126 127 /* prompt_end(): 128 * Clean up the prompt stuff 129 */ 130 protected void 131 /*ARGSUSED*/ 132 prompt_end(el) 133 EditLine *el; 134 { 135 } /* end prompt_end */ 136 137 138 /* prompt_set(): 139 * Install a prompt printing function 140 */ 141 protected int 142 prompt_set(el, prf, op) 143 EditLine *el; 144 el_pfunc_t prf; 145 int op; 146 { 147 el_prompt_t *p; 148 149 if (op == EL_PROMPT) 150 p = &el->el_prompt; 151 else 152 p = &el->el_rprompt; 153 if (prf == NULL) { 154 if (op == EL_PROMPT) 155 p->p_func = prompt_default; 156 else 157 p->p_func = prompt_default_r; 158 } else 159 p->p_func = prf; 160 p->p_pos.v = 0; 161 p->p_pos.h = 0; 162 return 0; 163 } /* end prompt_set */ 164 165 166 /* prompt_get(): 167 * Retrieve the prompt printing function 168 */ 169 protected int 170 prompt_get(el, prf, op) 171 EditLine *el; 172 el_pfunc_t *prf; 173 int op; 174 { 175 if (prf == NULL) 176 return -1; 177 if (op == EL_PROMPT) 178 *prf = el->el_prompt.p_func; 179 else 180 *prf = el->el_rprompt.p_func; 181 return 0; 182 } /* end prompt_get */ 183