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Annotation of 43BSDReno/usr.bin/window/wwclreol.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:  * 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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