ffba9c2def
When compiling with -O3 gcc seems to be a lot stricter on its checks for index out of bounds error. Change-Id: I5a63e1db6aa2375223ff13c6352643a9804fa93d
136 lines
4.2 KiB
C
136 lines
4.2 KiB
C
/* $NetBSD: copywin.c,v 1.15 2009/07/22 16:57:14 roy Exp $ */
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/*-
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* Copyright (c) 1998-1999 Brett Lymn
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* (blymn@baea.com.au, brett_lymn@yahoo.com.au)
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* All rights reserved.
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*
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* This code has been donated to The NetBSD Foundation by the Author.
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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. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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__RCSID("$NetBSD: copywin.c,v 1.15 2009/07/22 16:57:14 roy Exp $");
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#endif /* not lint */
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#include <ctype.h>
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#include <string.h>
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#include "curses.h"
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#include "curses_private.h"
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/*
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* copywin --
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* Copy the box starting at (sminrow, smincol) with a size that
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* matches the destination box (dminrow, dmincol) by (dmaxrow, dmaxcol)
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* from the source window srcwin to the destination window dstwin.
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* All these coordindinates are relative to the relevant window.
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* If dooverlay is true then the copy is nondestructive otherwise the
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* copy is destructive.
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*/
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int copywin(const WINDOW *srcwin, WINDOW *dstwin,
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int sminrow, int smincol,
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int dminrow, int dmincol, int dmaxrow, int dmaxcol, int dooverlay)
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{
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int dcol;
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__LDATA *sp, *end;
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#ifdef HAVE_WCHAR
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cchar_t cc;
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nschar_t *np;
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#endif /* HAVE_WCHAR */
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/* overwrite() and overlay() can come here with -ve srcwin coords */
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if (sminrow < 0) {
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dminrow -= sminrow;
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sminrow = 0;
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}
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if (smincol < 0) {
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dmincol -= smincol;
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smincol = 0;
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}
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/* for symmetry allow dstwin coords to be -ve as well */
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if (dminrow < 0) {
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sminrow -= dminrow;
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dminrow = 0;
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}
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if (dmincol < 0) {
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smincol -= dmincol;
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dmincol = 0;
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}
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/* Bound dmaxcol for both windows (should be ok for dstwin) */
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if (dmaxcol >= dstwin->maxx)
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dmaxcol = dstwin->maxx - 1;
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if (smincol + (dmaxcol - dmincol) >= srcwin->maxx)
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dmaxcol = srcwin->maxx + dmincol - smincol - 1;
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if (dmaxcol < dmincol)
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/* nothing in the intersection */
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return OK;
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/* Bound dmaxrow for both windows (should be ok for dstwin) */
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if (dmaxrow >= dstwin->maxy)
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dmaxrow = dstwin->maxy - 1;
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if (sminrow + (dmaxrow - dminrow) >= srcwin->maxy)
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dmaxrow = srcwin->maxy + dminrow - sminrow - 1;
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#ifdef DEBUG
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__CTRACE(__CTRACE_WINDOW,
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"copywin %s mode: from (%d,%d) to (%d,%d-%d,%d)\n",
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dooverlay ? "overlay" : "overwrite",
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sminrow, smincol, dminrow, dmincol, dmaxrow, dmaxcol);
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#endif
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for (; dminrow <= dmaxrow; sminrow++, dminrow++) {
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sp = &srcwin->alines[sminrow]->line[smincol];
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end = sp + dmaxcol - dmincol;
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for (dcol = dmincol; sp <= end; dcol++, sp++) {
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/* XXX: Perhaps this should check for the
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* background character
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*/
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if ((dooverlay && !isspace(sp->ch)) || !dooverlay) {
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wmove(dstwin, dminrow, dcol);
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#ifndef HAVE_WCHAR
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__waddch(dstwin, sp);
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#else
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cc.vals[0] = sp->ch;
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cc.attributes = sp->attr;
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cc.elements = 1;
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np = sp->nsp;
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if (np) {
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/* MINIX: off-by one error, has to be strictly less than. */
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while (np && cc.elements <
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CURSES_CCHAR_MAX) {
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cc.vals[cc.elements++] = np->ch;
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np = np->next;
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}
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}
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wadd_wch(dstwin, &cc);
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#endif /* HAVE_WCHAR */
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}
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}
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}
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__touchwin(dstwin);
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return OK;
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}
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