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prompt.c revision 1.2 
      1 /*	$NetBSD: prompt.c,v 1.2 1997/01/11 06:48:04 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 #if !defined(lint) && !defined(SCCSID)
     40 #if 0
     41 static char sccsid[] = "@(#)prompt.c	8.1 (Berkeley) 6/4/93";
     42 #else
     43 static char rcsid[] = "$NetBSD: prompt.c,v 1.2 1997/01/11 06:48:04 lukem Exp $";
     44 #endif
     45 #endif /* not lint && not SCCSID */
     46 
     47 /*
     48  * prompt.c: Prompt printing functions
     49  */
     50 #include "sys.h"
     51 #include <stdio.h>
     52 #include "el.h"
     53 
     54 private char *prompt_default	__P((EditLine *));
     55 
     56 /* prompt_default():
     57  *	Just a default prompt, in case the user did not provide one
     58  */
     59 private char *
     60 /*ARGSUSED*/
     61 prompt_default(el)
     62     EditLine *el;
     63 {
     64     static char a[3] = { '?', ' ', '\0' };
     65     return a;
     66 }
     67 
     68 
     69 /* prompt_print():
     70  *	Print the prompt and update the prompt position.
     71  *	We use an array of integers in case we want to pass
     72  * 	literal escape sequences in the prompt and we want a
     73  *	bit to flag them
     74  */
     75 protected void
     76 prompt_print(el)
     77     EditLine *el;
     78 {
     79     char *p = (*el->el_prompt.p_func)(el);
     80     while (*p)
     81 	re_putc(el, *p++);
     82 
     83     el->el_prompt.p_pos.v = el->el_refresh.r_cursor.v;
     84     el->el_prompt.p_pos.h = el->el_refresh.r_cursor.h;
     85 
     86 } /* end prompt_print */
     87 
     88 
     89 /* prompt_init():
     90  *	Initialize the prompt stuff
     91  */
     92 protected int
     93 prompt_init(el)
     94     EditLine *el;
     95 {
     96     el->el_prompt.p_func = prompt_default;
     97     el->el_prompt.p_pos.v = 0;
     98     el->el_prompt.p_pos.h = 0;
     99     return 0;
    100 } /* end prompt_init */
    101 
    102 
    103 /* prompt_end():
    104  *	Clean up the prompt stuff
    105  */
    106 protected void
    107 /*ARGSUSED*/
    108 prompt_end(el)
    109     EditLine *el;
    110 {
    111 } /* end prompt_end */
    112 
    113 
    114 /* prompt_set():
    115  *	Install a prompt printing function
    116  */
    117 protected int
    118 prompt_set(el, prf)
    119     EditLine *el;
    120     el_pfunc_t prf;
    121 {
    122     if (prf == NULL)
    123 	el->el_prompt.p_func = prompt_default;
    124     else
    125 	el->el_prompt.p_func = prf;
    126     el->el_prompt.p_pos.v = 0;
    127     el->el_prompt.p_pos.h = 0;
    128     return 0;
    129 } /* end prompt_set */
    130