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    /*	$NetBSD: prompt.c,v 1.9 2002/03/18 16:00:56 christos Exp $	*/
    
    /*-
     * Copyright (c) 1992, 1993
     *	The Regents of the University of California.  All rights reserved.
     *
     * This code is derived from software contributed to Berkeley by
     * Christos Zoulas of Cornell University.
     *
     * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *	This product includes software developed by the University of
     *	California, Berkeley and its contributors.
     * 4. Neither the name of the University nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     */
    
    #include "config.h"
    #if !defined(lint) && !defined(SCCSID)
    #if 0
    static char sccsid[] = "@(#)prompt.c	8.1 (Berkeley) 6/4/93";
    #else
    __RCSID("$NetBSD: prompt.c,v 1.9 2002/03/18 16:00:56 christos Exp $");
    #endif
    #endif /* not lint && not SCCSID */
    
    /*
     * prompt.c: Prompt printing functions
     */
    #include <stdio.h>
    #include "el.h"
    
    private char	*prompt_default(EditLine *);
    private char	*prompt_default_r(EditLine *);
    
    /* prompt_default():
     *	Just a default prompt, in case the user did not provide one
     */
    private char *
    /*ARGSUSED*/
    prompt_default(EditLine *el)
    {
    	static char a[3] = {'?', ' ', '\0'};
    
    	return (a);
    }
    
    
    /* prompt_default_r():
     *	Just a default rprompt, in case the user did not provide one
     */
    private char *
    /*ARGSUSED*/
    prompt_default_r(EditLine *el)
    {
    	static char a[1] = {'\0'};
    
    	return (a);
    }
    
    
    /* prompt_print():
     *	Print the prompt and update the prompt position.
     *	We use an array of integers in case we want to pass
     * 	literal escape sequences in the prompt and we want a
     *	bit to flag them
     */
    protected void
    prompt_print(EditLine *el, int op)
    {
    	el_prompt_t *elp;
    	char *p;
    
    	if (op == EL_PROMPT)
    		elp = &el->el_prompt;
    	else
    		elp = &el->el_rprompt;
    	p = (elp->p_func) (el);
    	while (*p)
    		re_putc(el, *p++, 1);
    
    	elp->p_pos.v = el->el_refresh.r_cursor.v;
    	elp->p_pos.h = el->el_refresh.r_cursor.h;
    }
    
    
    /* prompt_init():
     *	Initialize the prompt stuff
     */
    protected int
    prompt_init(EditLine *el)
    {
    
    	el->el_prompt.p_func = prompt_default;
    	el->el_prompt.p_pos.v = 0;
    	el->el_prompt.p_pos.h = 0;
    	el->el_rprompt.p_func = prompt_default_r;
    	el->el_rprompt.p_pos.v = 0;
    	el->el_rprompt.p_pos.h = 0;
    	return (0);
    }
    
    
    /* prompt_end():
     *	Clean up the prompt stuff
     */
    protected void
    /*ARGSUSED*/
    prompt_end(EditLine *el)
    {
    }
    
    
    /* prompt_set():
     *	Install a prompt printing function
     */
    protected int
    prompt_set(EditLine *el, el_pfunc_t prf, int op)
    {
    	el_prompt_t *p;
    
    	if (op == EL_PROMPT)
    		p = &el->el_prompt;
    	else
    		p = &el->el_rprompt;
    	if (prf == NULL) {
    		if (op == EL_PROMPT)
    			p->p_func = prompt_default;
    		else
    			p->p_func = prompt_default_r;
    	} else
    		p->p_func = prf;
    	p->p_pos.v = 0;
    	p->p_pos.h = 0;
    	return (0);
    }
    
    
    /* prompt_get():
     *	Retrieve the prompt printing function
     */
    protected int
    prompt_get(EditLine *el, el_pfunc_t *prf, int op)
    {
    
    	if (prf == NULL)
    		return (-1);
    	if (op == EL_PROMPT)
    		*prf = el->el_prompt.p_func;
    	else
    		*prf = el->el_rprompt.p_func;
    	return (0);
    }