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Annotation of 43BSD/ucb/window/wwadd.c, revision 1.1.1.1

1.1       root        1: #ifndef lint
                      2: static char sccsid[] = "@(#)wwadd.c    3.9 4/24/85";
                      3: #endif
                      4: 
                      5: /*
                      6:  * Copyright (c) 1983 Regents of the University of California,
                      7:  * All rights reserved.  Redistribution permitted subject to
                      8:  * the terms of the Berkeley Software License Agreement.
                      9:  */
                     10: 
                     11: #include "ww.h"
                     12: 
                     13: /*
                     14:  * Stick w1 behind w2.
                     15:  */
                     16: wwadd(w1, w2)
                     17: register struct ww *w1;
                     18: struct ww *w2;
                     19: {
                     20:        register i;
                     21:        register struct ww *w;
                     22: 
                     23:        w1->ww_order = w2->ww_order + 1;
                     24:        w1->ww_back = w2;
                     25:        w1->ww_forw = w2->ww_forw;
                     26:        w2->ww_forw->ww_back = w1;
                     27:        w2->ww_forw = w1;
                     28: 
                     29:        for (w = w1->ww_forw; w != &wwhead; w = w->ww_forw)
                     30:                w->ww_order++;
                     31:        for (i = w1->ww_i.t; i < w1->ww_i.b; i++) {
                     32:                register j;
                     33:                register char *smap = wwsmap[i];
                     34:                register char *win = w1->ww_win[i];
                     35:                union ww_char *ns = wwns[i];
                     36:                union ww_char *buf = w1->ww_buf[i];
                     37:                int nvis = 0;
                     38:                int nchanged = 0;
                     39: 
                     40:                for (j = w1->ww_i.l; j < w1->ww_i.r; j++) {
                     41:                        w = wwindex[smap[j]];
                     42:                        if (w1->ww_order > w->ww_order)
                     43:                                continue;
                     44:                        if (win[j] & WWM_GLS)
                     45:                                continue;
                     46:                        if (w != &wwnobody && w->ww_win[i][j] == 0)
                     47:                                w->ww_nvis[i]--;
                     48:                        smap[j] = w1->ww_index;
                     49:                        if (win[j] == 0)
                     50:                                nvis++;
                     51:                        ns[j].c_w = buf[j].c_w ^ win[j] << WWC_MSHIFT;
                     52:                        nchanged++;
                     53:                }
                     54:                if (nchanged > 4)
                     55:                        wwtouched[i] |= WWU_MAJOR|WWU_TOUCHED;
                     56:                else if (nchanged > 0)
                     57:                        wwtouched[i] |= WWU_TOUCHED;
                     58:                w1->ww_nvis[i] = nvis;
                     59:        }
                     60: }

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