usr/src/lib/libcurses/screen/winnwstr.c

   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  * Copy n chars(wchar_t) in window win from current cursor position to end
  40  * of window into char buffer str.  Return the number of chars copied.
  41  */
  42
  43 int
  44 winnwstr(WINDOW *win, wchar_t *wstr, int ncols)
  45 {
  46         int     counter = 0;
  47         int     cy = win->_cury;
  48         chtype  *ptr = &(win->_y[cy][win->_curx]),
  49                 *pmax = &(win->_y[cy][win->_maxx]);
  50         wchar_t wc, *cp;
  51         int     scrw, s;
  52         char    cbuf[CSMAX+1];
  53
  54
  55         while (ISCBIT(*ptr))
  56                 ptr--;
  57
  58         if (ncols < -1)
  59                 ncols = MAXINT;
  60
  61         while (counter < ncols) {
  62                 wc = RBYTE(*ptr);
  63                 scrw = mbscrw((int) wc);
  64                 (void) mbeucw((int) wc);
  65                 /* LINTED */
  66                 cp = (wchar_t *)cbuf;
  67                 for (s = 0; s < scrw; s++, ptr++) {
  68                         if ((wc = RBYTE(*ptr)) == MBIT)
  69                                 continue;
  70                         *cp++ = wc;
  71                         if ((wc = LBYTE(*ptr) | MBIT) == MBIT)
  72                                 continue;
  73                         *cp++ = wc;
  74                 }
  75                 *cp = (char)0;
  76
  77                 if (_curs_mbtowc(&wc, cbuf, CSMAX) <= 0)
  78                         break;
  79
  80                 *wstr++ = wc;
  81                 counter++;
  82
  83                 if (ptr >= pmax) {
  84                         if (++cy == win->_maxy)
  85                                 break;
  86
  87                         ptr = &(win->_y[cy][0]);
  88                         pmax = ptr + win->_maxx;
  89                 }
  90         }
  91         if (counter < ncols)
  92                 *wstr = (wchar_t)0;
  93
  94         return (counter);
  95 }