diff options
Diffstat (limited to 'usr.bin/window/wwadd.c')
-rw-r--r-- | usr.bin/window/wwadd.c | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/usr.bin/window/wwadd.c b/usr.bin/window/wwadd.c new file mode 100644 index 0000000..377464a --- /dev/null +++ b/usr.bin/window/wwadd.c @@ -0,0 +1,88 @@ +/* + * Copyright (c) 1983, 1993 + * The Regents of the University of California. All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * Edward Wang at The University of California, Berkeley. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifndef lint +static char sccsid[] = "@(#)wwadd.c 8.1 (Berkeley) 6/6/93"; +#endif /* not lint */ + +#include "ww.h" + +/* + * Stick w1 behind w2. + */ +wwadd(w1, w2) +register struct ww *w1; +struct ww *w2; +{ + register i; + register struct ww *w; + + w1->ww_order = w2->ww_order + 1; + w1->ww_back = w2; + w1->ww_forw = w2->ww_forw; + w2->ww_forw->ww_back = w1; + w2->ww_forw = w1; + + for (w = w1->ww_forw; w != &wwhead; w = w->ww_forw) + w->ww_order++; + for (i = w1->ww_i.t; i < w1->ww_i.b; i++) { + register j; + register char *smap = wwsmap[i]; + register char *win = w1->ww_win[i]; + union ww_char *ns = wwns[i]; + union ww_char *buf = w1->ww_buf[i]; + int nvis = 0; + int nchanged = 0; + + for (j = w1->ww_i.l; j < w1->ww_i.r; j++) { + w = wwindex[smap[j]]; + if (w1->ww_order > w->ww_order) + continue; + if (win[j] & WWM_GLS) + continue; + if (w != &wwnobody && w->ww_win[i][j] == 0) + w->ww_nvis[i]--; + smap[j] = w1->ww_index; + if (win[j] == 0) + nvis++; + ns[j].c_w = buf[j].c_w ^ win[j] << WWC_MSHIFT; + nchanged++; + } + if (nchanged > 0) + wwtouched[i] |= WWU_TOUCHED; + w1->ww_nvis[i] = nvis; + } +} |