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prompt.c revision 1.7 
      1 /*	$NetBSD: prompt.c,v 1.7 2000/09/04 22:06:31 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 1.7 2000/09/04 22:06:31 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(EditLine *);
     56 private char	*prompt_default_r(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(EditLine *el)
     64 {
     65 	static char a[3] = {'?', ' ', '\0'};
     66 
     67 	return (a);
     68 }
     69 
     70 
     71 /* prompt_default_r():
     72  *	Just a default rprompt, in case the user did not provide one
     73  */
     74 private char *
     75 /*ARGSUSED*/
     76 prompt_default_r(EditLine *el)
     77 {
     78 	static char a[1] = {'\0'};
     79 
     80 	return (a);
     81 }
     82 
     83 
     84 /* prompt_print():
     85  *	Print the prompt and update the prompt position.
     86  *	We use an array of integers in case we want to pass
     87  * 	literal escape sequences in the prompt and we want a
     88  *	bit to flag them
     89  */
     90 protected void
     91 prompt_print(EditLine *el, int op)
     92 {
     93 	el_prompt_t *elp;
     94 	char *p;
     95 
     96 	if (op == EL_PROMPT)
     97 		elp = &el->el_prompt;
     98 	else
     99 		elp = &el->el_rprompt;
    100 	p = (elp->p_func) (el);
    101 	while (*p)
    102 		re_putc(el, *p++);
    103 
    104 	elp->p_pos.v = el->el_refresh.r_cursor.v;
    105 	elp->p_pos.h = el->el_refresh.r_cursor.h;
    106 }
    107 
    108 
    109 /* prompt_init():
    110  *	Initialize the prompt stuff
    111  */
    112 protected int
    113 prompt_init(EditLine *el)
    114 {
    115 
    116 	el->el_prompt.p_func = prompt_default;
    117 	el->el_prompt.p_pos.v = 0;
    118 	el->el_prompt.p_pos.h = 0;
    119 	el->el_rprompt.p_func = prompt_default_r;
    120 	el->el_rprompt.p_pos.v = 0;
    121 	el->el_rprompt.p_pos.h = 0;
    122 	return (0);
    123 }
    124 
    125 
    126 /* prompt_end():
    127  *	Clean up the prompt stuff
    128  */
    129 protected void
    130 /*ARGSUSED*/
    131 prompt_end(EditLine *el)
    132 {
    133 }
    134 
    135 
    136 /* prompt_set():
    137  *	Install a prompt printing function
    138  */
    139 protected int
    140 prompt_set(EditLine *el, el_pfunc_t prf, int op)
    141 {
    142 	el_prompt_t *p;
    143 
    144 	if (op == EL_PROMPT)
    145 		p = &el->el_prompt;
    146 	else
    147 		p = &el->el_rprompt;
    148 	if (prf == NULL) {
    149 		if (op == EL_PROMPT)
    150 			p->p_func = prompt_default;
    151 		else
    152 			p->p_func = prompt_default_r;
    153 	} else
    154 		p->p_func = prf;
    155 	p->p_pos.v = 0;
    156 	p->p_pos.h = 0;
    157 	return (0);
    158 }
    159 
    160 
    161 /* prompt_get():
    162  *	Retrieve the prompt printing function
    163  */
    164 protected int
    165 prompt_get(EditLine *el, el_pfunc_t *prf, int op)
    166 {
    167 
    168 	if (prf == NULL)
    169 		return (-1);
    170 	if (op == EL_PROMPT)
    171 		*prf = el->el_prompt.p_func;
    172 	else
    173 		*prf = el->el_rprompt.p_func;
    174 	return (0);
    175 }
    176