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prompt.c revision 1.4 
      1 /*	$NetBSD: prompt.c,v 1.4 1998/07/29 02:26:01 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 1.4 1998/07/29 02:26:01 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 
     57 /* prompt_default():
     58  *	Just a default prompt, in case the user did not provide one
     59  */
     60 private char *
     61 /*ARGSUSED*/
     62 prompt_default(el)
     63     EditLine *el;
     64 {
     65     static char a[3] = { '?', ' ', '\0' };
     66     return a;
     67 }
     68 
     69 
     70 /* prompt_print():
     71  *	Print the prompt and update the prompt position.
     72  *	We use an array of integers in case we want to pass
     73  * 	literal escape sequences in the prompt and we want a
     74  *	bit to flag them
     75  */
     76 protected void
     77 prompt_print(el)
     78     EditLine *el;
     79 {
     80     char *p = (*el->el_prompt.p_func)(el);
     81     while (*p)
     82 	re_putc(el, *p++);
     83 
     84     el->el_prompt.p_pos.v = el->el_refresh.r_cursor.v;
     85     el->el_prompt.p_pos.h = el->el_refresh.r_cursor.h;
     86 
     87 } /* end prompt_print */
     88 
     89 
     90 /* prompt_init():
     91  *	Initialize the prompt stuff
     92  */
     93 protected int
     94 prompt_init(el)
     95     EditLine *el;
     96 {
     97     el->el_prompt.p_func = prompt_default;
     98     el->el_prompt.p_pos.v = 0;
     99     el->el_prompt.p_pos.h = 0;
    100     return 0;
    101 } /* end prompt_init */
    102 
    103 
    104 /* prompt_end():
    105  *	Clean up the prompt stuff
    106  */
    107 protected void
    108 /*ARGSUSED*/
    109 prompt_end(el)
    110     EditLine *el;
    111 {
    112 } /* end prompt_end */
    113 
    114 
    115 /* prompt_set():
    116  *	Install a prompt printing function
    117  */
    118 protected int
    119 prompt_set(el, prf)
    120     EditLine *el;
    121     el_pfunc_t prf;
    122 {
    123     if (prf == NULL)
    124 	el->el_prompt.p_func = prompt_default;
    125     else
    126 	el->el_prompt.p_func = prf;
    127     el->el_prompt.p_pos.v = 0;
    128     el->el_prompt.p_pos.h = 0;
    129     return 0;
    130 } /* end prompt_set */
    131 
    132 
    133 /* prompt_get():
    134  *	Retrieve the prompt printing function
    135  */
    136 protected int
    137 prompt_get(el, prf)
    138     EditLine *el;
    139     el_pfunc_t *prf;
    140 {
    141     if (prf == NULL)
    142 	return -1;
    143     *prf = el->el_prompt.p_func;
    144     return 0;
    145 } /* end prompt_get */
    146