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Annotation of 43BSDTahoe/ucb/window/wwinsline.c, revision 1.1.1.1

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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