usr/src/lib/libcurses/screen/winchnstr.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 /*
  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 #pragma ident   "%Z%%M% %I%     %E% SMI"
  41
  42 /*LINTLIBRARY*/
  43
  44 #include        <sys/types.h>
  45 #include        "curses_inc.h"
  46
  47 /*
  48  * Read in ncols worth of data from window win and assign the
  49  * chars to string. NULL terminate string upon completion.
  50  * Return the number of chtypes copied.
  51  */
  52
  53 int
  54 winchnstr(WINDOW *win, chtype *string, int ncols)
  55 {
  56         chtype  *ptr = &(win->_y[win->_cury][win->_curx]);
  57         int     counter = 0;
  58         int     maxcols = win->_maxx - win->_curx;
  59         int     eucw, scrw, s;
  60         chtype  rawc, attr, wc;
  61
  62         if (ncols < 0)
  63                 ncols = MAXINT;
  64
  65         while (ISCBIT(*ptr)) {
  66                 ptr--;
  67                 maxcols++;
  68         }
  69
  70         while ((counter < ncols) && maxcols > 0) {
  71                 eucw = mbeucw((int) RBYTE(*ptr));
  72                 scrw = mbscrw((int) RBYTE(*ptr));
  73
  74                 if (counter + eucw > ncols)
  75                         break;
  76                 for (s = 0; s < scrw; s++, maxcols--, ptr++) {
  77                         attr = _ATTR(*ptr);
  78                         rawc = _CHAR(*ptr);
  79                         if ((wc = RBYTE(rawc)) == MBIT)
  80                                 continue;
  81                         *string++ = wc | attr;
  82                         counter++;
  83                         if ((wc = LBYTE(rawc) | MBIT) == MBIT)
  84                                 continue;
  85                         *string++ = wc | attr;
  86                         counter++;
  87                 }
  88         }
  89         if (counter < ncols)
  90                 *string = (chtype) 0;
  91         return (counter);
  92 }