2a780e62ed
without refresh. If the window is not dirty but the window cursor position does not match curscr then move the cursor. This fixes the issues seen in PR lib/54263.
170 lines
4.6 KiB
C
170 lines
4.6 KiB
C
/* $NetBSD: instr.c,v 1.7 2019/06/09 07:40:14 blymn Exp $ */
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/*
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* Copyright 2001 Wasabi Systems, Inc.
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* All rights reserved.
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*
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* Written by Simon Burge for Wasabi Systems, Inc.
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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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed for the NetBSD Project by
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* Wasabi Systems, Inc.
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* 4. The name of Wasabi Systems, Inc. may not be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC. BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF 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: instr.c,v 1.7 2019/06/09 07:40:14 blymn 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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#ifndef _CURSES_USE_MACROS
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/*
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* instr, innstr --
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* Return a string of characters at cursor position from stdscr.
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*/
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__warn_references(instr,
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"warning: this program uses instr(), which is unsafe.");
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int
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instr(char *str)
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{
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return winstr(stdscr, str);
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}
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int
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innstr(char *str, int n)
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{
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return winnstr(stdscr, str, n);
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}
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/*
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* mvinstr, mvinnstr --
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* Return a string of characters at position (y, x) from stdscr.
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* XXX: should be multi-byte characters for SUSv2.
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*/
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__warn_references(mvinstr,
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"warning: this program uses mvinstr(), which is unsafe.");
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int
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mvinstr(int y, int x, char *str)
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{
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return mvwinstr(stdscr, y, x, str);
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}
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int
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mvinnstr(int y, int x, char *str, int n)
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{
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return mvwinnstr(stdscr, y, x, str, n);
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}
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/*
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* mvwinstr, mvwinnstr --
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* Return an array characters at position (y, x) from the given window.
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* XXX: should be multi-byte characters for SUSv2.
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*/
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__warn_references(mvwinstr,
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"warning: this program uses mvwinstr(), which is unsafe.");
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int
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mvwinstr(WINDOW *win, int y, int x, char *str)
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{
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if (wmove(win, y, x) == ERR)
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return ERR;
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return winstr(win, str);
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}
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int
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mvwinnstr(WINDOW *win, int y, int x, char *str, int n)
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{
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if (wmove(win, y, x) == ERR)
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return ERR;
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return winnstr(win, str, n);
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}
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#endif /* _CURSES_USE_MACROS */
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/*
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* winstr, winnstr --
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* Return a string of characters at cursor position.
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* XXX: should be multi-byte characters for SUSv2.
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*/
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__warn_references(winstr,
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"warning: this program uses winstr(), which is unsafe.");
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int
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winstr(WINDOW *win, char *str)
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{
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return winnstr(win, str, -1);
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}
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/*
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* XXX: This should go in a manpage!
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* - winnstr() returns the number of characters copied only of if it is
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* called with n >= 0 (ie, as inchnstr(), mvinchnstr(), mvwinchnstr()
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* or winchnstr()). If N < 0, it returns `OK'.
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* - SUSv2/xcurses doesn't document whether the trailing NUL is included
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* in the length count or not. For safety's sake it _is_ included.
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* - This implementation does not (yet) support multi-byte characters
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* strings.
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*/
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int
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winnstr(WINDOW *win, char *str, int n)
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{
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__LDATA *end, *start;
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int epos, sn;
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if (str == NULL)
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return ERR;
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sn = n;
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start = &win->alines[win->cury]->line[win->curx];
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/* (n - 1) to leave room for the trailing NUL */
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if (n < 0 || (n - 1) > win->maxx - win->curx - 1) {
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epos = win->maxx - 1;
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n = win->maxx - win->curx;
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} else {
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/* extra -1 for trailing NUL */
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epos = win->curx + n - 1 - 1;
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n--;
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}
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end = &win->alines[win->cury]->line[epos];
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while (start <= end) {
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*str = start->ch & __CHARTEXT;
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str++;
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start++;
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}
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*str = '\0';
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if (sn < 0)
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return OK;
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else
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return n;
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}
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