libcurses/screen/waddwchnstr.c

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*  Copyright (c) 1988 AT&T */
/*    All Rights Reserved   */


/*
 *      Copyright (c) 1997, by Sun Microsystems, Inc.
 *      All rights reserved.
 */

#pragma ident   "%Z%%M% %I% %E% SMI"

/*LINTLIBRARY*/

#include    <sys/types.h>
#include    "curses_inc.h"

/*
 * Add ncols worth of data to win, using string as input.
 * Return the number of chtypes copied.
 * Note: chtype contains 32/16 bit process code.
 */
int
waddwchnstr(WINDOW *win, chtype *string, int ncols)
{
    int     my_x = win->_curx;
    int     my_y = win->_cury;
    short       my_maxx;
    int     counter;
    chtype      *ptr = &(win->_y[my_y][my_x]);
    chtype      *sptr = ptr;
    char        mbbuf[CSMAX+1];
    int     mp, s, scrw;
    chtype      rawc;
    chtype      attr;
    short       my_x1 = win->_curx;


    while (ISCBIT(*ptr)) {
        ptr--;
        my_x1--;
    }
    while (ptr < sptr)
        *ptr++ = win->_bkgd;

    if (ncols == -1)
        ncols = MAXINT;

    counter = win->_maxx - my_x;
    while ((ncols > 0) && (*string) && (counter > 0)) {
        attr = *string & A_WATTRIBUTES;
        rawc = *string & A_WCHARTEXT;

        /* conver wchar_t to mbuti byte string */
        for (mp = 0; mp < sizeof (mbbuf); mp++)
            mbbuf[mp] = '\0';
        if (_curs_wctomb(mbbuf, rawc) <= 0)
            goto out;

        /* if there are no cols on screen, end */
        if ((scrw = wcscrw(rawc)) > counter)
            goto out;

        if (rawc & WCHAR_CSMASK) {
            /* store multi-byte string into chtype */
            for (s = 0, mp = 0; s < scrw; s++, mp += 2) {
                *ptr = _CHAR(RBYTE(mbbuf[mp]) |
                    RBYTE(mbbuf[mp + 1]) << 8) | CBIT;
                SETMBIT(*ptr);
                if (mp > 0)
                    SETCBIT(*ptr);
                else
                    CLRCBIT(*ptr);
                *ptr |= attr;
                ptr++;
            }
        } else {
        /* store single-byte string into chtype */
            *ptr = mbbuf[0];
            *ptr |= attr;
            ptr++;
        }

        ncols--;
        string++;
        counter -= scrw;
    }
out :

    while (ISCBIT(*ptr))
        *ptr++ = win->_bkgd;

    /* LINTED */
    my_maxx = (short) (ptr - sptr + my_x);

    if (my_x1 < win->_firstch[my_y])
        win->_firstch[my_y] = my_x1;

    if (my_maxx > win->_lastch[my_y])
        win->_lastch[my_y] = my_maxx;

    win->_flags |= _WINCHANGED;

    /* sync with ancestor structures */
    if (win->_sync)
        wsyncup(win);

    return (win->_immed ? wrefresh(win) : OK);
}