1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 1997 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* Copyright (c) 1988 AT&T */ 28 /* All Rights Reserved */ 29 30 /* 31 * University Copyright- Copyright (c) 1982, 1986, 1988 32 * The Regents of the University of California 33 * All Rights Reserved 34 * 35 * University Acknowledgment- Portions of this document are derived from 36 * software developed by the University of California, Berkeley, and its 37 * contributors. 38 */ 39 40 /*LINTLIBRARY*/ 41 42 #include <sys/types.h> 43 #include "curses_inc.h" 44 45 /* 46 * This routine writes Srcwin on Dstwin. 47 * Only the overlapping region is copied. 48 */ 49 50 int 51 _overlap(WINDOW *Srcwin, WINDOW *Dstwin, int Overlay) 52 { 53 int sby, sbx, sey, sex, dby, dbx, dey, dex, 54 top, bottom, left, right; 55 56 #ifdef DEBUG 57 if (outf) 58 fprintf(outf, "OVERWRITE(0%o, 0%o);\n", Srcwin, Dstwin); 59 #endif /* DEBUG */ 60 61 sby = Srcwin->_begy; dby = Dstwin->_begy; 62 sbx = Srcwin->_begx; dbx = Dstwin->_begx; 63 sey = sby + Srcwin->_maxy; dey = dby + Dstwin->_maxy; 64 sex = sbx + Srcwin->_maxx; dex = dbx + Dstwin->_maxx; 65 66 if (sey < dby || sby > dey || sex < dbx || sbx > dex) 67 return (ERR); 68 69 top = _MAX(sby, dby); bottom = _MIN(sey, dey); 70 left = _MAX(sbx, dbx); right = _MIN(sex, dex); 71 72 sby = top - sby; sbx = left - sbx; 73 dey = bottom - dby - 1; dex = right - dbx - 1; 74 dby = top - dby; dbx = left - dbx; 75 76 return (copywin(Srcwin, Dstwin, sby, sbx, dby, dbx, dey, dex, Overlay)); 77 } 78