292 lines
7.1 KiB
C
292 lines
7.1 KiB
C
/* $NetBSD: get_wstr.c,v 1.3 2008/04/14 20:33:59 jdc Exp $ */
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/*
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* Copyright (c) 2005 The NetBSD Foundation Inc.
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* All rights reserved.
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*
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* This code is derived from code donated to the NetBSD Foundation
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* by Ruibiao Qiu <ruibiao@arl.wustl.edu,ruibiao@gmail.com>.
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*
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND
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* CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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__RCSID("$NetBSD: get_wstr.c,v 1.3 2008/04/14 20:33:59 jdc Exp $");
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#endif /* not lint */
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#include "curses.h"
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#include "curses_private.h"
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/* prototypes for private functions */
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#ifdef HAVE_WCHAR
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static int __wgetn_wstr(WINDOW *, wchar_t *, int);
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#endif /* HAVE_WCHAR */
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/*
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* getn_wstr --
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* Get a string (of maximum n) characters from stdscr starting at
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* (cury, curx).
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*/
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int
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getn_wstr(wchar_t *wstr, int n)
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{
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#ifndef HAVE_WCHAR
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return ERR;
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#else
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return wgetn_wstr(stdscr, wstr, n);
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#endif /* HAVE_WCHAR */
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}
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/*
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* get_wstr --
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* Get a string from stdscr starting at (cury, curx).
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*/
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__warn_references(get_wstr,
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"warning: this program uses get_wstr(), which is unsafe.")
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int
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get_wstr(wchar_t *wstr)
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{
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#ifndef HAVE_WCHAR
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return ERR;
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#else
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return wget_wstr(stdscr, wstr);
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#endif /* HAVE_WCHAR */
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}
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/*
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* mvgetn_wstr --
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* Get a string (of maximum n) characters from stdscr starting at (y, x).
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*/
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int
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mvgetn_wstr(int y, int x, wchar_t *wstr, int n)
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{
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#ifndef HAVE_WCHAR
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return ERR;
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#else
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return mvwgetn_wstr(stdscr, y, x, wstr, n);
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#endif /* HAVE_WCHAR */
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}
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/*
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* mvget_wstr --
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* Get a string from stdscr starting at (y, x).
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*/
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__warn_references(mvget_wstr,
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"warning: this program uses mvget_wstr(), which is unsafe.")
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int
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mvget_wstr(int y, int x, wchar_t *wstr)
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{
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#ifndef HAVE_WCHAR
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return ERR;
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#else
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return mvwget_wstr(stdscr, y, x, wstr);
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#endif /* HAVE_WCHAR */
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}
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/*
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* mvwgetn_wstr --
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* Get a string (of maximum n) characters from the given window starting
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* at (y, x).
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*/
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int
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mvwgetn_wstr(WINDOW *win, int y, int x, wchar_t *wstr, int n)
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{
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#ifndef HAVE_WCHAR
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return ERR;
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#else
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if (wmove(win, y, x) == ERR)
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return ERR;
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return wgetn_wstr(win, wstr, n);
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#endif /* HAVE_WCHAR */
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}
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/*
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* mvwget_wstr --
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* Get a string from the given window starting at (y, x).
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*/
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__warn_references(mvget_wstr,
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"warning: this program uses mvget_wstr(), which is unsafe.")
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int
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mvwget_wstr(WINDOW *win, int y, int x, wchar_t *wstr)
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{
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#ifndef HAVE_WCHAR
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return ERR;
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#else
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if (wmove(win, y, x) == ERR)
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return ERR;
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return wget_wstr(win, wstr);
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#endif /* HAVE_WCHAR */
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}
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/*
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* wget_wstr --
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* Get a string starting at (cury, curx).
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*/
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__warn_references(wget_wstr,
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"warning: this program uses wget_wstr(), which is unsafe.")
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int
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wget_wstr(WINDOW *win, wchar_t *wstr)
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{
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#ifndef HAVE_WCHAR
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return ERR;
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#else
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return __wgetn_wstr(win, wstr, -1);
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#endif /* HAVE_WCHAR */
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}
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/*
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* wgetn_wstr --
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* Get a string starting at (cury, curx).
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* Note that n < 2 means that we return ERR (SUSv2 specification).
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*/
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int
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wgetn_wstr(WINDOW *win, wchar_t *wstr, int n)
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{
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#ifndef HAVE_WCHAR
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return ERR;
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#else
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if (n < 1)
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return (ERR);
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if (n == 1) {
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wstr[0] = L'\0';
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return (ERR);
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}
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return __wgetn_wstr(win, wstr, n);
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#endif /* HAVE_WCHAR */
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}
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#ifdef HAVE_WCHAR
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/*
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* __wgetn_wstr --
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* The actual implementation.
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* Note that we include a trailing L'\0' for safety, so str will contain
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* at most n - 1 other characters.
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*/
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int
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__wgetn_wstr(WINDOW *win, wchar_t *wstr, int n)
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{
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wchar_t *ostr, ec, kc, sc[ 2 ];
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int oldx, remain;
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wint_t wc;
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cchar_t cc;
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ostr = wstr;
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if ( erasewchar( &ec ) == ERR )
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return ERR;
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if ( killwchar( &kc ) == ERR )
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return ERR;
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sc[ 0 ] = ( wchar_t )btowc( ' ' );
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sc[ 1 ] = L'\0';
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setcchar( &cc, sc, win->wattr, 0, NULL );
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oldx = win->curx;
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remain = n - 1;
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while (wget_wch(win, &wc) != ERR
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&& wc != L'\n' && wc != L'\r') {
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#ifdef DEBUG
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__CTRACE(__CTRACE_INPUT,
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"__wgetn_wstr: win %p, char 0x%x, remain %d\n",
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win, wc, remain);
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#endif
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*wstr = wc;
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touchline(win, win->cury, 1);
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if (wc == ec || wc == KEY_BACKSPACE || wc == KEY_LEFT) {
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*wstr = L'\0';
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if (wstr != ostr) {
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if ((wchar_t)wc == ec) {
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mvwadd_wch(win, win->cury,
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win->curx, &cc);
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wmove(win, win->cury, win->curx - 1);
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}
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if (wc == KEY_BACKSPACE || wc == KEY_LEFT) {
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/* getch() displays the key sequence */
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mvwadd_wch(win, win->cury,
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win->curx - 1, &cc);
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mvwadd_wch(win, win->cury,
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win->curx - 2, &cc);
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wmove(win, win->cury, win->curx - 1);
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}
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wstr--;
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if (n != -1) {
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/* We're counting chars */
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remain++;
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}
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} else { /* str == ostr */
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if (wc == KEY_BACKSPACE || wc == KEY_LEFT)
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/* getch() displays the other keys */
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mvwadd_wch(win, win->cury,
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win->curx - 1, &cc);
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wmove(win, win->cury, oldx);
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}
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} else if (wc == kc) {
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*wstr = L'\0';
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if (wstr != ostr) {
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/* getch() displays the kill character */
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mvwadd_wch(win, win->cury, win->curx - 1, &cc);
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/* Clear the characters from screen and str */
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while (wstr != ostr) {
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mvwadd_wch(win, win->cury,
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win->curx - 1, &cc);
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wmove(win, win->cury, win->curx - 1);
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wstr--;
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if (n != -1)
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/* We're counting chars */
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remain++;
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}
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mvwadd_wch(win, win->cury, win->curx - 1, &cc);
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wmove(win, win->cury, win->curx - 1);
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} else
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/* getch() displays the kill character */
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mvwadd_wch( win, win->cury, oldx, &cc );
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wmove(win, win->cury, oldx);
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} else if (wc >= KEY_MIN && wc <= KEY_MAX) {
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/* get_wch() displays these characters */
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mvwadd_wch( win, win->cury, win->curx - 1, &cc );
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wmove(win, win->cury, win->curx - 1);
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} else {
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if (remain) {
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wstr++;
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remain--;
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} else {
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mvwadd_wch(win, win->cury, win->curx - 1, &cc);
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wmove(win, win->cury, win->curx - 1);
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}
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}
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}
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if (wc == ERR) {
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*wstr = L'\0';
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return ERR;
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}
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*wstr = L'\0';
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return OK;
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}
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#endif /* HAVE_WCHAR */
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