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prompt.c revision 1.1 
      1 /*-
      2  * Copyright (c) 1992, 1993
      3  *	The Regents of the University of California.  All rights reserved.
      4  *
      5  * This code is derived from software contributed to Berkeley by
      6  * Christos Zoulas of Cornell University.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  * 1. Redistributions of source code must retain the above copyright
     12  *    notice, this list of conditions and the following disclaimer.
     13  * 2. Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in the
     15  *    documentation and/or other materials provided with the distribution.
     16  * 3. All advertising materials mentioning features or use of this software
     17  *    must display the following acknowledgement:
     18  *	This product includes software developed by the University of
     19  *	California, Berkeley and its contributors.
     20  * 4. Neither the name of the University nor the names of its contributors
     21  *    may be used to endorse or promote products derived from this software
     22  *    without specific prior written permission.
     23  *
     24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     34  * SUCH DAMAGE.
     35  */
     36 
     37 #if !defined(lint) && !defined(SCCSID)
     38 static char sccsid[] = "@(#)prompt.c	8.1 (Berkeley) 6/4/93";
     39 #endif /* not lint && not SCCSID */
     40 
     41 /*
     42  * prompt.c: Prompt printing functions
     43  */
     44 #include "sys.h"
     45 #include <stdio.h>
     46 #include "el.h"
     47 
     48 private char *prompt_default	__P((EditLine *));
     49 
     50 /* prompt_default():
     51  *	Just a default prompt, in case the user did not provide one
     52  */
     53 private char *
     54 /*ARGSUSED*/
     55 prompt_default(el)
     56     EditLine *el;
     57 {
     58     static char a[3] = { '?', ' ', '\0' };
     59     return a;
     60 }
     61 
     62 
     63 /* prompt_print():
     64  *	Print the prompt and update the prompt position.
     65  *	We use an array of integers in case we want to pass
     66  * 	literal escape sequences in the prompt and we want a
     67  *	bit to flag them
     68  */
     69 protected void
     70 prompt_print(el)
     71     EditLine *el;
     72 {
     73     char *p = (*el->el_prompt.p_func)(el);
     74     while (*p)
     75 	re_putc(el, *p++);
     76 
     77     el->el_prompt.p_pos.v = el->el_refresh.r_cursor.v;
     78     el->el_prompt.p_pos.h = el->el_refresh.r_cursor.h;
     79 
     80 } /* end prompt_print */
     81 
     82 
     83 /* prompt_init():
     84  *	Initialize the prompt stuff
     85  */
     86 protected int
     87 prompt_init(el)
     88     EditLine *el;
     89 {
     90     el->el_prompt.p_func = prompt_default;
     91     el->el_prompt.p_pos.v = 0;
     92     el->el_prompt.p_pos.h = 0;
     93     return 0;
     94 } /* end prompt_init */
     95 
     96 
     97 /* prompt_end():
     98  *	Clean up the prompt stuff
     99  */
    100 protected void
    101 /*ARGSUSED*/
    102 prompt_end(el)
    103     EditLine *el;
    104 {
    105 } /* end prompt_end */
    106 
    107 
    108 /* prompt_set():
    109  *	Install a prompt printing function
    110  */
    111 protected int
    112 prompt_set(el, prf)
    113     EditLine *el;
    114     el_pfunc_t prf;
    115 {
    116     if (prf == NULL)
    117 	el->el_prompt.p_func = prompt_default;
    118     else
    119 	el->el_prompt.p_func = prf;
    120     el->el_prompt.p_pos.v = 0;
    121     el->el_prompt.p_pos.h = 0;
    122     return 0;
    123 } /* end prompt_set */
    124