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Annotation of src/usr.bin/window/wwclreol.c, Revision 1.1

1.1     ! deraadt     1: /*     $NetBSD: wwclreol.c,v 1.3 1995/09/28 10:35:15 tls Exp $ */
        !             2:
        !             3: /*
        !             4:  * Copyright (c) 1983, 1993
        !             5:  *     The Regents of the University of California.  All rights reserved.
        !             6:  *
        !             7:  * This code is derived from software contributed to Berkeley by
        !             8:  * Edward Wang at The University of California, Berkeley.
        !             9:  *
        !            10:  * Redistribution and use in source and binary forms, with or without
        !            11:  * modification, are permitted provided that the following conditions
        !            12:  * are met:
        !            13:  * 1. Redistributions of source code must retain the above copyright
        !            14:  *    notice, this list of conditions and the following disclaimer.
        !            15:  * 2. Redistributions in binary form must reproduce the above copyright
        !            16:  *    notice, this list of conditions and the following disclaimer in the
        !            17:  *    documentation and/or other materials provided with the distribution.
        !            18:  * 3. All advertising materials mentioning features or use of this software
        !            19:  *    must display the following acknowledgement:
        !            20:  *     This product includes software developed by the University of
        !            21:  *     California, Berkeley and its contributors.
        !            22:  * 4. Neither the name of the University nor the names of its contributors
        !            23:  *    may be used to endorse or promote products derived from this software
        !            24:  *    without specific prior written permission.
        !            25:  *
        !            26:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            27:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            28:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            29:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            30:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            31:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            32:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            33:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            34:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            35:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            36:  * SUCH DAMAGE.
        !            37:  */
        !            38:
        !            39: #ifndef lint
        !            40: #if 0
        !            41: static char sccsid[] = "@(#)wwclreol.c 8.1 (Berkeley) 6/6/93";
        !            42: #else
        !            43: static char rcsid[] = "$NetBSD: wwclreol.c,v 1.3 1995/09/28 10:35:15 tls Exp $";
        !            44: #endif
        !            45: #endif /* not lint */
        !            46:
        !            47: #include "ww.h"
        !            48: #include "tt.h"
        !            49:
        !            50: /*
        !            51:  * Clear w to the end of line.
        !            52:  * If cleared is true, then the screen line has already been cleared.
        !            53:  */
        !            54: wwclreol1(w, row, col, cleared)
        !            55: register struct ww *w;
        !            56: int row, col;
        !            57: char cleared;
        !            58: {
        !            59:        register i;
        !            60:
        !            61:        /*
        !            62:         * Clear the buffer right off
        !            63:         */
        !            64:        {
        !            65:                register union ww_char *buf;
        !            66:
        !            67:                buf = &w->ww_buf[row][col];
        !            68:                for (i = w->ww_b.r - col; --i >= 0;)
        !            69:                        buf++->c_w = ' ';
        !            70:        }
        !            71:
        !            72:        /*
        !            73:         * If can't see it, just return.
        !            74:         */
        !            75:        if (row < w->ww_i.t || row >= w->ww_i.b
        !            76:            || w->ww_i.r <= 0 || w->ww_i.r <= col)
        !            77:                return;
        !            78:
        !            79:        if (col < w->ww_i.l)
        !            80:                col = w->ww_i.l;
        !            81:
        !            82:        /*
        !            83:         * Now fix wwns.
        !            84:         */
        !            85:        {
        !            86:                register union ww_char *s;
        !            87:                register char *smap, *win;
        !            88:
        !            89:                i = col;
        !            90:                smap = &wwsmap[row][i];
        !            91:                s = &wwns[row][i];
        !            92:                win = &w->ww_win[row][i];
        !            93:                for (i = w->ww_i.r - i; --i >= 0;)
        !            94:                        if (*smap++ == w->ww_index)
        !            95:                                s++->c_w = ' ' | *win++ << WWC_MSHIFT;
        !            96:                        else
        !            97:                                s++, win++;
        !            98:        }
        !            99:        if (!cleared)
        !           100:                wwtouched[row] |= WWU_TOUCHED;
        !           101: }