BSD 4_4 release

[unix-history] / usr / src / lib / libedit / prompt.c

/*-
* 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.
*/

#if !defined(lint) && !defined(SCCSID)
static char sccsid[] = "@(#)prompt.c    8.1 (Berkeley) 6/4/93";
#endif /* not lint && not SCCSID */

/*
* prompt.c: Prompt printing functions
*/
#include "sys.h"
#include <stdio.h>
#include "el.h"

private char *prompt_default    __P((EditLine *));

/* prompt_default():
*      Just a default prompt, in case the user did not provide one
*/
private char *
/*ARGSUSED*/
prompt_default(el)
   EditLine *el;
{
   static char a[3] = { '?', ' ', '\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(el)
   EditLine *el;
{
   char *p = (*el->el_prompt.p_func)(el);
   while (*p)
       re_putc(el, *p++);

   el->el_prompt.p_pos.v = el->el_refresh.r_cursor.v;
   el->el_prompt.p_pos.h = el->el_refresh.r_cursor.h;

} /* end prompt_print */


/* prompt_init():
*      Initialize the prompt stuff
*/
protected int 
prompt_init(el)
   EditLine *el;
{
   el->el_prompt.p_func = prompt_default;
   el->el_prompt.p_pos.v = 0;
   el->el_prompt.p_pos.h = 0;
   return 0;
} /* end prompt_init */


/* prompt_end():
*      Clean up the prompt stuff
*/
protected void
/*ARGSUSED*/ 
prompt_end(el)
   EditLine *el;
{
} /* end prompt_end */


/* prompt_set():
*      Install a prompt printing function
*/
protected int 
prompt_set(el, prf)
   EditLine *el;
   el_pfunc_t prf;
{
   if (prf == NULL)
       el->el_prompt.p_func = prompt_default;
   else
       el->el_prompt.p_func = prf;
   el->el_prompt.p_pos.v = 0;
   el->el_prompt.p_pos.h = 0;
   return 0;
} /* end prompt_set */