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Annotation of 43BSDTahoe/usr.lib/libcurses/erase.c, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 1981 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[] = "@(#)erase.c    5.3 (Berkeley) 6/30/88";
                     20: #endif /* not lint */
                     21: 
                     22: # include      "curses.ext"
                     23: 
                     24: /*
                     25:  *     This routine erases everything on the window.
                     26:  *
                     27:  */
                     28: werase(win)
                     29: reg WINDOW     *win; {
                     30: 
                     31:        reg int         y;
                     32:        reg char        *sp, *end, *start, *maxx;
                     33:        reg int         minx;
                     34: 
                     35: # ifdef DEBUG
                     36:        fprintf(outf, "WERASE(%0.2o)\n", win);
                     37: # endif
                     38:        for (y = 0; y < win->_maxy; y++) {
                     39:                minx = _NOCHANGE;
                     40:                start = win->_y[y];
                     41:                end = &start[win->_maxx];
                     42:                for (sp = start; sp < end; sp++)
                     43:                        if (*sp != ' ') {
                     44:                                maxx = sp;
                     45:                                if (minx == _NOCHANGE)
                     46:                                        minx = sp - start;
                     47:                                *sp = ' ';
                     48:                        }
                     49:                if (minx != _NOCHANGE)
                     50:                        touchline(win, y, minx, maxx - win->_y[y]);
                     51:        }
                     52:        win->_curx = win->_cury = 0;
                     53: }

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