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 /* Copyright (c) 1988 AT&T */ 23 /* All Rights Reserved */ 24 25 26 /* 27 * Copyright (c) 1997, by Sun Microsystems, Inc. 28 * All rights reserved. 29 */ 30 31 #pragma ident "%Z%%M% %I% %E% SMI" 32 33 /*LINTLIBRARY*/ 34 35 #include <sys/types.h> 36 #include "curses_inc.h" 37 38 /* 39 * Shift right an interval of characters 40 */ 41 42 int 43 _mbinsshift(WINDOW *win, int len) 44 { 45 int x, y, maxx, mv; 46 chtype *wcp, *wp, *ep; 47 48 y = win->_cury; 49 x = win->_curx; 50 maxx = win->_maxx; 51 wcp = win->_y[y]; 52 53 /* ASSERT(!ISCBIT(wcp[x])); */ 54 55 /* shift up to a whole character */ 56 if (_scrmax > 1) { 57 wp = wcp + maxx - 1; 58 if (ISMBIT(*wp)) { 59 reg chtype rb; 60 61 for (; wp >= wcp; --wp) 62 if (!ISCBIT(*wp)) 63 break; 64 if (wp < wcp) 65 return (ERR); 66 rb = RBYTE(*wp); 67 if ((wp + _curs_scrwidth[TYPE(rb)]) > (wcp + maxx)) 68 /*LINTED*/ 69 maxx = (int)(wp - wcp); 70 } 71 } 72 73 /* see if any data need to move */ 74 if ((mv = maxx - (x+len)) <= 0) 75 return (OK); 76 77 /* the end of the moved interval must be whole */ 78 if (ISCBIT(wcp[x + mv])) 79 (void) _mbclrch(win, y, x + mv - 1); 80 81 /* move data */ 82 ep = wcp + x + len; 83 for (wp = wcp + maxx - 1; wp >= ep; --wp) 84 *wp = *(wp - len); 85 86 /* clear a possible partial multibyte character */ 87 if (ISMBIT(*wp)) 88 for (ep = wp; ep >= wcp; --ep) { 89 mv = (int)(ISCBIT(*ep)); 90 *ep = win->_bkgd; 91 if (!mv) 92 break; 93 } 94 95 /* update the change structure */ 96 if (x < win->_firstch[y]) 97 /*LINTED*/ 98 win->_firstch[y] = (short)x; 99 win->_lastch[y] = maxx - 1; 100 101 return (OK); 102 } 103