lib/libedit/prompt.c

   1 /*      $NetBSD: prompt.c,v 1.17 2009/12/30 22:37:40 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. 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 1.17 2009/12/30 22:37:40 christos 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  */
  82 protected void
  83 prompt_print(EditLine *el, int op)
  84 {
  85         el_prompt_t *elp;
  86         Char *p;
  87         int ignore = 0;
  88
  89         if (op == EL_PROMPT)
  90                 elp = &el->el_prompt;
  91         else
  92                 elp = &el->el_rprompt;
  93
  94         if (elp->p_wide)
  95                 p = (*elp->p_func)(el);
  96         else
  97                 p = ct_decode_string((char *)(void *)(*elp->p_func)(el),
  98                     &el->el_scratch);
  99
 100         for (; *p; p++) {
 101                 if (elp->p_ignore == *p) {
 102                         ignore = !ignore;
 103                         continue;
 104                 }
 105                 if (ignore)
 106                         term__putc(el, *p);
 107                 else
 108                         re_putc(el, *p, 1);
 109         }
 110
 111         elp->p_pos.v = el->el_refresh.r_cursor.v;
 112         elp->p_pos.h = el->el_refresh.r_cursor.h;
 113 }
 114
 115
 116 /* prompt_init():
 117  *      Initialize the prompt stuff
 118  */
 119 protected int
 120 prompt_init(EditLine *el)
 121 {
 122
 123         el->el_prompt.p_func = prompt_default;
 124         el->el_prompt.p_pos.v = 0;
 125         el->el_prompt.p_pos.h = 0;
 126         el->el_prompt.p_ignore = '\0';
 127         el->el_rprompt.p_func = prompt_default_r;
 128         el->el_rprompt.p_pos.v = 0;
 129         el->el_rprompt.p_pos.h = 0;
 130         el->el_rprompt.p_ignore = '\0';
 131         return 0;
 132 }
 133
 134
 135 /* prompt_end():
 136  *      Clean up the prompt stuff
 137  */
 138 protected void
 139 /*ARGSUSED*/
 140 prompt_end(EditLine *el __attribute__((__unused__)))
 141 {
 142 }
 143
 144
 145 /* prompt_set():
 146  *      Install a prompt printing function
 147  */
 148 protected int
 149 prompt_set(EditLine *el, el_pfunc_t prf, Char c, int op, int wide)
 150 {
 151         el_prompt_t *p;
 152
 153         if (op == EL_PROMPT || op == EL_PROMPT_ESC)
 154                 p = &el->el_prompt;
 155         else
 156                 p = &el->el_rprompt;
 157
 158         if (prf == NULL) {
 159                 if (op == EL_PROMPT || op == EL_PROMPT_ESC)
 160                         p->p_func = prompt_default;
 161                 else
 162                         p->p_func = prompt_default_r;
 163         } else {
 164                 p->p_func = prf;
 165         }
 166
 167         p->p_ignore = c;
 168
 169         p->p_pos.v = 0;
 170         p->p_pos.h = 0;
 171         p->p_wide = wide;
 172
 173         return 0;
 174 }
 175
 176
 177 /* prompt_get():
 178  *      Retrieve the prompt printing function
 179  */
 180 protected int
 181 prompt_get(EditLine *el, el_pfunc_t *prf, Char *c, int op)
 182 {
 183         el_prompt_t *p;
 184
 185         if (prf == NULL)
 186                 return -1;
 187
 188         if (op == EL_PROMPT)
 189                 p = &el->el_prompt;
 190         else
 191                 p = &el->el_rprompt;
 192
 193         if (prf)
 194                 *prf = p->p_func;
 195         if (c)
 196                 *c = p->p_ignore;
 197
 198         return 0;
 199 }