usr/src/lib/libcurses/screen/winnstr.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  * Copy n chars in window win from current cursor position to end
  49  * of window into char buffer str.  Return the number of chars copied.
  50  */
  51
  52 int
  53 winnstr(WINDOW *win, char *str, int ncols)
  54 {
  55         int     counter = 0;
  56         int     cy = win->_cury;
  57         chtype  *ptr = &(win->_y[cy][win->_curx]),
  58                 *pmax = &(win->_y[cy][win->_maxx]);
  59         chtype  wc;
  60         int     eucw, scrw, s;
  61
  62
  63         while (ISCBIT(*ptr))
  64                 ptr--;
  65
  66         if (ncols < -1)
  67                 ncols = MAXINT;
  68
  69         while (counter < ncols) {
  70                 scrw = mbscrw((int) RBYTE(*ptr));
  71                 eucw = mbeucw((int) RBYTE(*ptr));
  72                 if (counter + eucw > ncols)
  73                         break;
  74
  75                 for (s = 0; s < scrw; s++, ptr++) {
  76                         if ((wc = RBYTE(*ptr)) == MBIT)
  77                                 continue;
  78                         /* LINTED */
  79                         *str++ = (char) wc;
  80                         counter++;
  81                         if ((wc = LBYTE(*ptr) | MBIT) == MBIT)
  82                                 continue;
  83                         /* LINTED */
  84                         *str++ = (char) wc;
  85                         counter++;
  86                 }
  87
  88                 if (ptr >= pmax) {
  89                         if (++cy == win->_maxy)
  90                                 break;
  91
  92                         ptr = &(win->_y[cy][0]);
  93                         pmax = ptr + win->_maxx;
  94                 }
  95         }
  96         if (counter < ncols)
  97                 *str = '\0';
  98
  99         return (counter);
 100 }