1 /* $OpenBSD: prompt.c,v 1.8 2009/10/27 23:59:28 deraadt Exp $ */ 2 /* $NetBSD: prompt.c,v 1.11 2003/08/07 16:44:32 agc Exp $ */ 3 4 /*- 5 * Copyright (c) 1992, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * Christos Zoulas of Cornell University. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include "config.h" 37 38 /* 39 * prompt.c: Prompt printing functions 40 */ 41 #include <stdio.h> 42 #include "el.h" 43 44 private char *prompt_default(EditLine *); 45 private char *prompt_default_r(EditLine *); 46 47 /* prompt_default(): 48 * Just a default prompt, in case the user did not provide one 49 */ 50 private char * 51 /*ARGSUSED*/ 52 prompt_default(EditLine *el __attribute__((__unused__))) 53 { 54 static char a[3] = {'?', ' ', '\0'}; 55 56 return (a); 57 } 58 59 60 /* prompt_default_r(): 61 * Just a default rprompt, in case the user did not provide one 62 */ 63 private char * 64 /*ARGSUSED*/ 65 prompt_default_r(EditLine *el __attribute__((__unused__))) 66 { 67 static char a[1] = {'\0'}; 68 69 return (a); 70 } 71 72 73 /* prompt_print(): 74 * Print the prompt and update the prompt position. 75 * We use an array of integers in case we want to pass 76 * literal escape sequences in the prompt and we want a 77 * bit to flag them 78 */ 79 protected void 80 prompt_print(EditLine *el, int op) 81 { 82 el_prompt_t *elp; 83 char *p; 84 85 if (op == EL_PROMPT) 86 elp = &el->el_prompt; 87 else 88 elp = &el->el_rprompt; 89 p = (elp->p_func) (el); 90 while (*p) 91 re_putc(el, *p++, 1); 92 93 elp->p_pos.v = el->el_refresh.r_cursor.v; 94 elp->p_pos.h = el->el_refresh.r_cursor.h; 95 } 96 97 98 /* prompt_init(): 99 * Initialize the prompt stuff 100 */ 101 protected int 102 prompt_init(EditLine *el) 103 { 104 105 el->el_prompt.p_func = prompt_default; 106 el->el_prompt.p_pos.v = 0; 107 el->el_prompt.p_pos.h = 0; 108 el->el_rprompt.p_func = prompt_default_r; 109 el->el_rprompt.p_pos.v = 0; 110 el->el_rprompt.p_pos.h = 0; 111 return (0); 112 } 113 114 115 /* prompt_end(): 116 * Clean up the prompt stuff 117 */ 118 protected void 119 /*ARGSUSED*/ 120 prompt_end(EditLine *el __attribute__((__unused__))) 121 { 122 } 123 124 125 /* prompt_set(): 126 * Install a prompt printing function 127 */ 128 protected int 129 prompt_set(EditLine *el, el_pfunc_t prf, int op) 130 { 131 el_prompt_t *p; 132 133 if (op == EL_PROMPT) 134 p = &el->el_prompt; 135 else 136 p = &el->el_rprompt; 137 if (prf == NULL) { 138 if (op == EL_PROMPT) 139 p->p_func = prompt_default; 140 else 141 p->p_func = prompt_default_r; 142 } else 143 p->p_func = prf; 144 p->p_pos.v = 0; 145 p->p_pos.h = 0; 146 return (0); 147 } 148 149 150 /* prompt_get(): 151 * Retrieve the prompt printing function 152 */ 153 protected int 154 prompt_get(EditLine *el, el_pfunc_t *prf, int op) 155 { 156 157 if (prf == NULL) 158 return (-1); 159 if (op == EL_PROMPT) 160 *prf = el->el_prompt.p_func; 161 else 162 *prf = el->el_rprompt.p_func; 163 return (0); 164 } 165