NetBSD/lib/libcurses/inwstr.c

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2007-01-21 14:38:58 +03:00
/* $NetBSD: inwstr.c,v 1.1 2007/01/21 11:38:59 blymn 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: inwstr.c,v 1.1 2007/01/21 11:38:59 blymn Exp $");
#endif /* not lint */
#include "curses.h"
#include "curses_private.h"
/*
* inwstr, innwstr --
* Return a string of wide characters at cursor position from stdscr.
*/
__warn_references(inwstr,
"warning: this program uses inwstr(), which is unsafe.")
int
inwstr(wchar_t *wstr)
{
#ifndef HAVE_WCHAR
return ERR;
#else
return winwstr(stdscr, wstr);
#endif /* HAVE_WCHAR */
}
int
innwstr(wchar_t *wstr, int n)
{
#ifndef HAVE_WCHAR
return ERR;
#else
return winnwstr(stdscr, wstr, n);
#endif /* HAVE_WCHAR */
}
/*
* mvinwstr, mvinnwstr --
* Return a string of wide characters at position (y, x) from stdscr.
*/
__warn_references(mvinwstr,
"warning: this program uses mvinwstr(), which is unsafe.")
int
mvinwstr(int y, int x, wchar_t *wstr)
{
#ifndef HAVE_WCHAR
return ERR;
#else
return mvwinwstr(stdscr, y, x, wstr);
#endif /* HAVE_WCHAR */
}
int
mvinnwstr(int y, int x, wchar_t *wstr, int n)
{
#ifndef HAVE_WCHAR
return ERR;
#else
return mvwinnwstr(stdscr, y, x, wstr, n);
#endif /* HAVE_WCHAR */
}
/*
* mvwinwstr, mvwinnwstr --
* Return an array wide characters at position (y, x) from the given window.
*/
__warn_references(mvwinwstr,
"warning: this program uses mvwinwstr(), which is unsafe.")
int
mvwinwstr(WINDOW *win, int y, int x, wchar_t *wstr)
{
#ifndef HAVE_WCHAR
return ERR;
#else
if (wmove(win, y, x) == ERR)
return ERR;
return winwstr(win, wstr);
#endif /* HAVE_WCHAR */
}
int
mvwinnwstr(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 winnwstr(win, wstr, n);
#endif /* HAVE_WCHAR */
}
/*
* winwstr, winnwstr --
* Return a string of wide characters at cursor position.
*/
__warn_references(winwstr,
"warning: this program uses winwstr(), which is unsafe.")
int
winwstr(WINDOW *win, wchar_t *wstr)
{
#ifndef HAVE_WCHAR
return ERR;
#else
return winnwstr(win, wstr, -1);
#endif /* HAVE_WCHAR */
}
/*
* - winnwstr() returns the number of characters copied only of if it is
* called with n >= 0 (ie, as in_wchnstr(), mvin_wchnstr(), mvwin_wchnstr()
* or win_wchnstr()). If N < 0, it returns `OK'.
* - SUSv2/xcurses doesn't document whether the trailing NUL is included
* in the length count or not. For safety's sake it _is_ included.
* - This implementation does not (yet) support multi-byte characters
* strings.
*/
int
winnwstr(WINDOW *win, wchar_t *wstr, int n)
{
#ifndef HAVE_WCHAR
return ERR;
#else
__LDATA *start;
int x, cw, cnt;
wchar_t *wcp;
if (wstr == NULL)
return ERR;
start = &win->lines[win->cury]->line[win->curx];
x = win->curx;
cw = WCOL( *start );
if (cw < 0) {
start += cw;
x += cw;
}
cnt = 0;
wcp = wstr;
/* (n - 1) to leave room for the trailing 0 element */
while ((x < win->maxx) && ((n < 0) || ((n > 1) && (cnt < n - 1)))) {
cw = WCOL( *start );
*wcp = start->ch;
wcp++;
cnt++;
x += cw;
if ( x < win->maxx )
start += cw;
}
*wcp = L'\0';
if (n < 0)
return OK;
else
return cnt;
#endif /* HAVE_WCHAR */
}