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Annotation of 43BSDReno/usr.bin/window/wwclreol.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1983 Regents of the University of California.
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * This code is derived from software contributed to Berkeley by
        !             6:  * Edward Wang at The University of California, Berkeley.
        !             7:  *
        !             8:  * Redistribution and use in source and binary forms are permitted provided
        !             9:  * that: (1) source distributions retain this entire copyright notice and
        !            10:  * comment, and (2) distributions including binaries display the following
        !            11:  * acknowledgement:  ``This product includes software developed by the
        !            12:  * University of California, Berkeley and its contributors'' in the
        !            13:  * documentation or other materials provided with the distribution and in
        !            14:  * all advertising materials mentioning features or use of this software.
        !            15:  * Neither the name of the University nor the names of its contributors may
        !            16:  * be used to endorse or promote products derived from this software without
        !            17:  * specific prior written permission.
        !            18:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
        !            19:  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
        !            20:  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            21:  */
        !            22: 
        !            23: #ifndef lint
        !            24: static char sccsid[] = "@(#)wwclreol.c 3.20 (Berkeley) 6/6/90";
        !            25: #endif /* not lint */
        !            26: 
        !            27: #include "ww.h"
        !            28: #include "tt.h"
        !            29: 
        !            30: /*
        !            31:  * Clear w to the end of line.
        !            32:  * If cleared is true, then the screen line has already been cleared.
        !            33:  */
        !            34: wwclreol1(w, row, col, cleared)
        !            35: register struct ww *w;
        !            36: int row, col;
        !            37: char cleared;
        !            38: {
        !            39:        register i;
        !            40: 
        !            41:        /*
        !            42:         * Clear the buffer right off
        !            43:         */
        !            44:        {
        !            45:                register union ww_char *buf;
        !            46: 
        !            47:                buf = &w->ww_buf[row][col]; 
        !            48:                for (i = w->ww_b.r - col; --i >= 0;)
        !            49:                        buf++->c_w = ' ';
        !            50:        }
        !            51: 
        !            52:        /*
        !            53:         * If can't see it, just return.
        !            54:         */
        !            55:        if (row < w->ww_i.t || row >= w->ww_i.b
        !            56:            || w->ww_i.r <= 0 || w->ww_i.r <= col)
        !            57:                return;
        !            58: 
        !            59:        if (col < w->ww_i.l)
        !            60:                col = w->ww_i.l;
        !            61: 
        !            62:        /*
        !            63:         * Now fix wwns.
        !            64:         */
        !            65:        {
        !            66:                register union ww_char *s;
        !            67:                register char *smap, *win;
        !            68: 
        !            69:                i = col;
        !            70:                smap = &wwsmap[row][i];
        !            71:                s = &wwns[row][i];
        !            72:                win = &w->ww_win[row][i];
        !            73:                for (i = w->ww_i.r - i; --i >= 0;)
        !            74:                        if (*smap++ == w->ww_index)
        !            75:                                s++->c_w = ' ' | *win++ << WWC_MSHIFT;
        !            76:                        else
        !            77:                                s++, win++;
        !            78:        }
        !            79:        if (!cleared)
        !            80:                wwtouched[row] |= WWU_TOUCHED;
        !            81: }

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