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90 lines
2.8 KiB
C
90 lines
2.8 KiB
C
/*
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* Copyright (c) 1983, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Edward Wang at The University of California, Berkeley.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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static char sccsid[] = "@(#)wwinsline.c 8.1 (Berkeley) 6/6/93";
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static char rcsid[] = "@(#)$FreeBSD$";
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#endif /* not lint */
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#include "ww.h"
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wwinsline(w, row)
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register struct ww *w;
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int row;
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{
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register i;
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register union ww_char **cpp, **cqq;
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register union ww_char *cp;
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int row1, row2;
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char deleted;
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int visible;
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/*
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* Scroll first.
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*/
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if ((row1 = row) < w->ww_i.t) {
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row1 = w->ww_i.t;
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visible = 0;
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} else
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visible = 1;
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if ((row2 = w->ww_b.b) > w->ww_i.b) {
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row2 = w->ww_i.b;
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}
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deleted = wwscroll1(w, row1, row2, -1, visible);
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/*
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* Fix the buffer.
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* But leave clearing the last line for wwclreol().
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*/
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cpp = &w->ww_buf[w->ww_b.b];
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cqq = cpp - 1;
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cp = *cqq;
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for (i = w->ww_b.b - row; --i > 0;)
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*--cpp = *--cqq;
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*cqq = cp;
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/*
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* Now clear the last line.
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*/
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if (visible)
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wwclreol1(w, row, w->ww_b.l, deleted);
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else {
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cp += w->ww_b.l;
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for (i = w->ww_b.nc; --i >= 0;)
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cp++->c_w = ' ';
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}
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}
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