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Annotation of 43BSDReno/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: (1) source distributions retain this entire copyright
                      7:  * notice and comment, and (2) distributions including binaries display
                      8:  * the following acknowledgement:  ``This product includes software
                      9:  * developed by the University of California, Berkeley and its contributors''
                     10:  * in the documentation or other materials provided with the distribution
                     11:  * and in all advertising materials mentioning features or use of this
                     12:  * software. Neither the name of the University nor the names of its
                     13:  * contributors may be used to endorse or promote products derived
                     14:  * from this software without specific prior written permission.
                     15:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
                     16:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
                     17:  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
                     18:  */
                     19: 
                     20: #ifndef lint
                     21: static char sccsid[] = "@(#)erase.c    5.4 (Berkeley) 6/1/90";
                     22: #endif /* not lint */
                     23: 
                     24: # include      "curses.ext"
                     25: 
                     26: /*
                     27:  *     This routine erases everything on the window.
                     28:  *
                     29:  */
                     30: werase(win)
                     31: reg WINDOW     *win; {
                     32: 
                     33:        reg int         y;
                     34:        reg char        *sp, *end, *start, *maxx;
                     35:        reg int         minx;
                     36: 
                     37: # ifdef DEBUG
                     38:        fprintf(outf, "WERASE(%0.2o)\n", win);
                     39: # endif
                     40:        for (y = 0; y < win->_maxy; y++) {
                     41:                minx = _NOCHANGE;
                     42:                start = win->_y[y];
                     43:                end = &start[win->_maxx];
                     44:                for (sp = start; sp < end; sp++)
                     45:                        if (*sp != ' ') {
                     46:                                maxx = sp;
                     47:                                if (minx == _NOCHANGE)
                     48:                                        minx = sp - start;
                     49:                                *sp = ' ';
                     50:                        }
                     51:                if (minx != _NOCHANGE)
                     52:                        touchline(win, y, minx, maxx - win->_y[y]);
                     53:        }
                     54:        win->_curx = win->_cury = 0;
                     55: }

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