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prompt.c revision 1.6 
      1 /*	$NetBSD: prompt.c,v 1.6 1999/11/12 01:05:07 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 1.6 1999/11/12 01:05:07 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 private char *prompt_default_r	__P((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(el)
     64     EditLine *el;
     65 {
     66     static char a[3] = { '?', ' ', '\0' };
     67     return a;
     68 }
     69 
     70 /* prompt_default_r():
     71  *	Just a default rprompt, in case the user did not provide one
     72  */
     73 private char *
     74 /*ARGSUSED*/
     75 prompt_default_r(el)
     76     EditLine *el;
     77 {
     78     static char a[1] = { '\0' };
     79     return a;
     80 }
     81 
     82 
     83 /* prompt_print():
     84  *	Print the prompt and update the prompt position.
     85  *	We use an array of integers in case we want to pass
     86  * 	literal escape sequences in the prompt and we want a
     87  *	bit to flag them
     88  */
     89 protected void
     90 prompt_print(el, op)
     91     EditLine *el;
     92     int op;
     93 {
     94     el_prompt_t	*elp;
     95     char	*p;
     96 
     97     if (op == EL_PROMPT)
     98 	elp = &el->el_prompt;
     99     else
    100 	elp = &el->el_rprompt;
    101     p = (elp->p_func)(el);
    102     while (*p)
    103 	re_putc(el, *p++);
    104 
    105     elp->p_pos.v = el->el_refresh.r_cursor.v;
    106     elp->p_pos.h = el->el_refresh.r_cursor.h;
    107 } /* end prompt_print */
    108 
    109 
    110 /* prompt_init():
    111  *	Initialize the prompt stuff
    112  */
    113 protected int
    114 prompt_init(el)
    115     EditLine *el;
    116 {
    117     el->el_prompt.p_func = prompt_default;
    118     el->el_prompt.p_pos.v = 0;
    119     el->el_prompt.p_pos.h = 0;
    120     el->el_rprompt.p_func = prompt_default_r;
    121     el->el_rprompt.p_pos.v = 0;
    122     el->el_rprompt.p_pos.h = 0;
    123     return 0;
    124 } /* end prompt_init */
    125 
    126 
    127 /* prompt_end():
    128  *	Clean up the prompt stuff
    129  */
    130 protected void
    131 /*ARGSUSED*/
    132 prompt_end(el)
    133     EditLine *el;
    134 {
    135 } /* end prompt_end */
    136 
    137 
    138 /* prompt_set():
    139  *	Install a prompt printing function
    140  */
    141 protected int
    142 prompt_set(el, prf, op)
    143     EditLine *el;
    144     el_pfunc_t prf;
    145     int op;
    146 {
    147     el_prompt_t *p;
    148 
    149     if (op == EL_PROMPT)
    150 	p = &el->el_prompt;
    151     else
    152 	p = &el->el_rprompt;
    153     if (prf == NULL) {
    154 	if (op == EL_PROMPT)
    155 	    p->p_func = prompt_default;
    156 	else
    157 	    p->p_func = prompt_default_r;
    158     } else
    159 	p->p_func = prf;
    160     p->p_pos.v = 0;
    161     p->p_pos.h = 0;
    162     return 0;
    163 } /* end prompt_set */
    164 
    165 
    166 /* prompt_get():
    167  *	Retrieve the prompt printing function
    168  */
    169 protected int
    170 prompt_get(el, prf, op)
    171     EditLine *el;
    172     el_pfunc_t *prf;
    173     int op;
    174 {
    175     if (prf == NULL)
    176 	return -1;
    177     if (op == EL_PROMPT)
    178     	*prf = el->el_prompt.p_func;
    179     else
    180     	*prf = el->el_rprompt.p_func;
    181     return 0;
    182 } /* end prompt_get */
    183