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Annotation of 43BSDTahoe/ucb/window/wwinsline.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1983 Regents of the University of California.
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * Redistribution and use in source and binary forms are permitted
        !             6:  * provided that the above copyright notice and this paragraph are
        !             7:  * duplicated in all such forms and that any documentation,
        !             8:  * advertising materials, and other materials related to such
        !             9:  * distribution and use acknowledge that the software was developed
        !            10:  * by the University of California, Berkeley.  The name of the
        !            11:  * University may not be used to endorse or promote products derived
        !            12:  * from this software without specific prior written permission.
        !            13:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
        !            14:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
        !            15:  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            16:  */
        !            17: 
        !            18: #ifndef lint
        !            19: static char sccsid[] = "@(#)wwinsline.c        3.10 (Berkeley) 6/29/88";
        !            20: #endif /* not lint */
        !            21: 
        !            22: #include "ww.h"
        !            23: 
        !            24: wwinsline(w, row)
        !            25: register struct ww *w;
        !            26: int row;
        !            27: {
        !            28:        register i;
        !            29:        register union ww_char **cpp, **cqq;
        !            30:        register union ww_char *cp;
        !            31:        int row1, row2;
        !            32:        char deleted;
        !            33:        int visible;
        !            34: 
        !            35:        /*
        !            36:         * Scroll first.
        !            37:         */
        !            38:        if ((row1 = row) < w->ww_i.t) {
        !            39:                row1 = w->ww_i.t;
        !            40:                visible = 0;
        !            41:        } else
        !            42:                visible = 1;
        !            43:        if ((row2 = w->ww_b.b) > w->ww_i.b) {
        !            44:                row2 = w->ww_i.b;
        !            45:        }
        !            46:        deleted = wwscroll1(w, row1, row2, -1, visible);
        !            47: 
        !            48:        /*
        !            49:         * Fix the buffer.
        !            50:         * But leave clearing the last line for wwclreol().
        !            51:         */
        !            52:        cpp = &w->ww_buf[w->ww_b.b];
        !            53:        cqq = cpp - 1;
        !            54:        cp = *cqq;
        !            55:        for (i = w->ww_b.b - row; --i > 0;)
        !            56:                *--cpp = *--cqq;
        !            57:        *cqq = cp;
        !            58: 
        !            59:        /*
        !            60:         * Now clear the last line.
        !            61:         */
        !            62:        if (visible)
        !            63:                wwclreol1(w, row, w->ww_b.l, deleted);
        !            64:        else {
        !            65:                cp += w->ww_b.l;
        !            66:                for (i = w->ww_b.nc; --i >= 0;)
        !            67:                        cp++->c_w = ' ';
        !            68:        }
        !            69: }

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