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Annotation of 43BSDTahoe/ucb/window/wwredrawwin.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[] = "@(#)wwredrawwin.c      3.13 (Berkeley) 6/29/88";
                     20: #endif /* not lint */
                     21: 
                     22: #include "ww.h"
                     23: 
                     24: wwredrawwin1(w, row1, row2, offset)
                     25: register struct ww *w;
                     26: int row1, row2, offset;
                     27: {
                     28:        int row;
                     29:        register col;
                     30:        register char *smap;
                     31:        register union ww_char *buf;
                     32:        register char *win;
                     33:        register union ww_char *ns;
                     34:        int x;
                     35:        int nchanged;
                     36: 
                     37:        for (row = row1; row < row2; row++) {
                     38:                col = w->ww_i.l;
                     39:                ns = wwns[row];
                     40:                smap = &wwsmap[row][col];
                     41:                buf = w->ww_buf[row + offset];
                     42:                win = w->ww_win[row];
                     43:                nchanged = 0;
                     44:                for (; col < w->ww_i.r; col++)
                     45:                        if (*smap++ == w->ww_index &&
                     46:                            ns[col].c_w !=
                     47:                            (x = buf[col].c_w ^ win[col] << WWC_MSHIFT)) {
                     48:                                nchanged++;
                     49:                                ns[col].c_w = x;
                     50:                        }
                     51:                if (nchanged > 4)
                     52:                        wwtouched[row] |= WWU_MAJOR|WWU_TOUCHED;
                     53:                else if (nchanged > 0)
                     54:                        wwtouched[row] |= WWU_TOUCHED;
                     55:        }
                     56: }

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