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