NetBSD/lib/libedit/prompt.c

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/* $NetBSD: prompt.c,v 1.27 2017/06/27 23:25:13 christos Exp $ */
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/*-
* 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. Neither the name of the University nor the names of its contributors
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* 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"
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#if !defined(lint) && !defined(SCCSID)
#if 0
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static char sccsid[] = "@(#)prompt.c 8.1 (Berkeley) 6/4/93";
#else
__RCSID("$NetBSD: prompt.c,v 1.27 2017/06/27 23:25:13 christos Exp $");
#endif
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#endif /* not lint && not SCCSID */
/*
* prompt.c: Prompt printing functions
*/
#include <stdio.h>
#include "el.h"
static wchar_t *prompt_default(EditLine *);
static wchar_t *prompt_default_r(EditLine *);
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/* prompt_default():
* Just a default prompt, in case the user did not provide one
*/
static wchar_t *
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/*ARGSUSED*/
prompt_default(EditLine *el __attribute__((__unused__)))
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{
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static wchar_t a[3] = L"? ";
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return a;
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}
/* prompt_default_r():
* Just a default rprompt, in case the user did not provide one
*/
static wchar_t *
/*ARGSUSED*/
prompt_default_r(EditLine *el __attribute__((__unused__)))
{
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static wchar_t a[1] = L"";
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return a;
}
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/* prompt_print():
* Print the prompt and update the prompt position.
*/
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libedit_private void
prompt_print(EditLine *el, int op)
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{
el_prompt_t *elp;
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wchar_t *p;
if (op == EL_PROMPT)
elp = &el->el_prompt;
else
elp = &el->el_rprompt;
if (elp->p_wide)
p = (*elp->p_func)(el);
else
p = ct_decode_string((char *)(void *)(*elp->p_func)(el),
&el->el_scratch);
for (; *p; p++) {
if (elp->p_ignore == *p) {
wchar_t *litstart = ++p;
while (*p && *p != elp->p_ignore)
p++;
if (!*p || !p[1]) {
// XXX: We lose the last literal
break;
}
re_putliteral(el, litstart, p++);
continue;
}
re_putc(el, *p, 1);
}
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elp->p_pos.v = el->el_refresh.r_cursor.v;
elp->p_pos.h = el->el_refresh.r_cursor.h;
}
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/* prompt_init():
* Initialize the prompt stuff
*/
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libedit_private int
prompt_init(EditLine *el)
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{
el->el_prompt.p_func = prompt_default;
el->el_prompt.p_pos.v = 0;
el->el_prompt.p_pos.h = 0;
el->el_prompt.p_ignore = '\0';
el->el_rprompt.p_func = prompt_default_r;
el->el_rprompt.p_pos.v = 0;
el->el_rprompt.p_pos.h = 0;
el->el_rprompt.p_ignore = '\0';
return 0;
}
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/* prompt_end():
* Clean up the prompt stuff
*/
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libedit_private void
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/*ARGSUSED*/
prompt_end(EditLine *el __attribute__((__unused__)))
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{
}
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/* prompt_set():
* Install a prompt printing function
*/
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libedit_private int
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prompt_set(EditLine *el, el_pfunc_t prf, wchar_t c, int op, int wide)
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{
el_prompt_t *p;
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if (op == EL_PROMPT || op == EL_PROMPT_ESC)
p = &el->el_prompt;
else
p = &el->el_rprompt;
if (prf == NULL) {
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if (op == EL_PROMPT || op == EL_PROMPT_ESC)
p->p_func = prompt_default;
else
p->p_func = prompt_default_r;
} else {
p->p_func = prf;
}
p->p_ignore = c;
p->p_pos.v = 0;
p->p_pos.h = 0;
p->p_wide = wide;
return 0;
}
/* prompt_get():
* Retrieve the prompt printing function
*/
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libedit_private int
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prompt_get(EditLine *el, el_pfunc_t *prf, wchar_t *c, int op)
{
el_prompt_t *p;
if (prf == NULL)
return -1;
if (op == EL_PROMPT)
p = &el->el_prompt;
else
p = &el->el_rprompt;
if (prf)
*prf = p->p_func;
if (c)
*c = p->p_ignore;
return 0;
}