NetBSD-5.0.2/lib/libcurses/get_wstr.c
/* $NetBSD: get_wstr.c,v 1.3 2008/04/14 20:33:59 jdc Exp $ */
/*
* Copyright (c) 2005 The NetBSD Foundation Inc.
* All rights reserved.
*
* This code is derived from code donated to the NetBSD Foundation
* by Ruibiao Qiu <ruibiao@arl.wustl.edu,ruibiao@gmail.com>.
*
*
* 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 NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 <sys/cdefs.h>
#ifndef lint
__RCSID("$NetBSD: get_wstr.c,v 1.3 2008/04/14 20:33:59 jdc Exp $");
#endif /* not lint */
#include "curses.h"
#include "curses_private.h"
/* prototypes for private functions */
#ifdef HAVE_WCHAR
static int __wgetn_wstr(WINDOW *, wchar_t *, int);
#endif /* HAVE_WCHAR */
/*
* getn_wstr --
* Get a string (of maximum n) characters from stdscr starting at
* (cury, curx).
*/
int
getn_wstr(wchar_t *wstr, int n)
{
#ifndef HAVE_WCHAR
return ERR;
#else
return wgetn_wstr(stdscr, wstr, n);
#endif /* HAVE_WCHAR */
}
/*
* get_wstr --
* Get a string from stdscr starting at (cury, curx).
*/
__warn_references(get_wstr,
"warning: this program uses get_wstr(), which is unsafe.")
int
get_wstr(wchar_t *wstr)
{
#ifndef HAVE_WCHAR
return ERR;
#else
return wget_wstr(stdscr, wstr);
#endif /* HAVE_WCHAR */
}
/*
* mvgetn_wstr --
* Get a string (of maximum n) characters from stdscr starting at (y, x).
*/
int
mvgetn_wstr(int y, int x, wchar_t *wstr, int n)
{
#ifndef HAVE_WCHAR
return ERR;
#else
return mvwgetn_wstr(stdscr, y, x, wstr, n);
#endif /* HAVE_WCHAR */
}
/*
* mvget_wstr --
* Get a string from stdscr starting at (y, x).
*/
__warn_references(mvget_wstr,
"warning: this program uses mvget_wstr(), which is unsafe.")
int
mvget_wstr(int y, int x, wchar_t *wstr)
{
#ifndef HAVE_WCHAR
return ERR;
#else
return mvwget_wstr(stdscr, y, x, wstr);
#endif /* HAVE_WCHAR */
}
/*
* mvwgetn_wstr --
* Get a string (of maximum n) characters from the given window starting
* at (y, x).
*/
int
mvwgetn_wstr(WINDOW *win, int y, int x, wchar_t *wstr, int n)
{
#ifndef HAVE_WCHAR
return ERR;
#else
if (wmove(win, y, x) == ERR)
return ERR;
return wgetn_wstr(win, wstr, n);
#endif /* HAVE_WCHAR */
}
/*
* mvwget_wstr --
* Get a string from the given window starting at (y, x).
*/
__warn_references(mvget_wstr,
"warning: this program uses mvget_wstr(), which is unsafe.")
int
mvwget_wstr(WINDOW *win, int y, int x, wchar_t *wstr)
{
#ifndef HAVE_WCHAR
return ERR;
#else
if (wmove(win, y, x) == ERR)
return ERR;
return wget_wstr(win, wstr);
#endif /* HAVE_WCHAR */
}
/*
* wget_wstr --
* Get a string starting at (cury, curx).
*/
__warn_references(wget_wstr,
"warning: this program uses wget_wstr(), which is unsafe.")
int
wget_wstr(WINDOW *win, wchar_t *wstr)
{
#ifndef HAVE_WCHAR
return ERR;
#else
return __wgetn_wstr(win, wstr, -1);
#endif /* HAVE_WCHAR */
}
/*
* wgetn_wstr --
* Get a string starting at (cury, curx).
* Note that n < 2 means that we return ERR (SUSv2 specification).
*/
int
wgetn_wstr(WINDOW *win, wchar_t *wstr, int n)
{
#ifndef HAVE_WCHAR
return ERR;
#else
if (n < 1)
return (ERR);
if (n == 1) {
wstr[0] = L'\0';
return (ERR);
}
return __wgetn_wstr(win, wstr, n);
#endif /* HAVE_WCHAR */
}
#ifdef HAVE_WCHAR
/*
* __wgetn_wstr --
* The actual implementation.
* Note that we include a trailing L'\0' for safety, so str will contain
* at most n - 1 other characters.
*/
int
__wgetn_wstr(WINDOW *win, wchar_t *wstr, int n)
{
wchar_t *ostr, ec, kc, sc[ 2 ];
int oldx, remain;
wint_t wc;
cchar_t cc;
ostr = wstr;
if ( erasewchar( &ec ) == ERR )
return ERR;
if ( killwchar( &kc ) == ERR )
return ERR;
sc[ 0 ] = ( wchar_t )btowc( ' ' );
sc[ 1 ] = L'\0';
setcchar( &cc, sc, win->wattr, 0, NULL );
oldx = win->curx;
remain = n - 1;
while (wget_wch(win, &wc) != ERR
&& wc != L'\n' && wc != L'\r') {
#ifdef DEBUG
__CTRACE(__CTRACE_INPUT,
"__wgetn_wstr: win %p, char 0x%x, remain %d\n",
win, wc, remain);
#endif
*wstr = wc;
touchline(win, win->cury, 1);
if (wc == ec || wc == KEY_BACKSPACE || wc == KEY_LEFT) {
*wstr = L'\0';
if (wstr != ostr) {
if ((wchar_t)wc == ec) {
mvwadd_wch(win, win->cury,
win->curx, &cc);
wmove(win, win->cury, win->curx - 1);
}
if (wc == KEY_BACKSPACE || wc == KEY_LEFT) {
/* getch() displays the key sequence */
mvwadd_wch(win, win->cury,
win->curx - 1, &cc);
mvwadd_wch(win, win->cury,
win->curx - 2, &cc);
wmove(win, win->cury, win->curx - 1);
}
wstr--;
if (n != -1) {
/* We're counting chars */
remain++;
}
} else { /* str == ostr */
if (wc == KEY_BACKSPACE || wc == KEY_LEFT)
/* getch() displays the other keys */
mvwadd_wch(win, win->cury,
win->curx - 1, &cc);
wmove(win, win->cury, oldx);
}
} else if (wc == kc) {
*wstr = L'\0';
if (wstr != ostr) {
/* getch() displays the kill character */
mvwadd_wch(win, win->cury, win->curx - 1, &cc);
/* Clear the characters from screen and str */
while (wstr != ostr) {
mvwadd_wch(win, win->cury,
win->curx - 1, &cc);
wmove(win, win->cury, win->curx - 1);
wstr--;
if (n != -1)
/* We're counting chars */
remain++;
}
mvwadd_wch(win, win->cury, win->curx - 1, &cc);
wmove(win, win->cury, win->curx - 1);
} else
/* getch() displays the kill character */
mvwadd_wch( win, win->cury, oldx, &cc );
wmove(win, win->cury, oldx);
} else if (wc >= KEY_MIN && wc <= KEY_MAX) {
/* get_wch() displays these characters */
mvwadd_wch( win, win->cury, win->curx - 1, &cc );
wmove(win, win->cury, win->curx - 1);
} else {
if (remain) {
wstr++;
remain--;
} else {
mvwadd_wch(win, win->cury, win->curx - 1, &cc);
wmove(win, win->cury, win->curx - 1);
}
}
}
if (wc == ERR) {
*wstr = L'\0';
return ERR;
}
*wstr = L'\0';
return OK;
}
#endif /* HAVE_WCHAR */