432 lines
10 KiB
C
432 lines
10 KiB
C
/*
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* Copyright (c) 1981, 1993
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* The Regents of the University of California. All rights reserved.
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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[] = "@(#)cr_put.c 8.2 (Berkeley) 1/9/94";
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#endif /* not lint */
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#include <curses.h>
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#include <string.h>
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#define HARDTABS 8
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/*
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* Terminal driving and line formatting routines. Basic motion optimizations
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* are done here as well as formatting lines (printing of control characters,
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* line numbering and the like).
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*/
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/* Stub function for the users. */
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int
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mvcur(ly, lx, y, x)
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int ly, lx, y, x;
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{
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return (__mvcur(ly, lx, y, x, 0));
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}
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static void fgoto __P((int));
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static int plod __P((int, int));
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static void plodput __P((int));
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static int tabcol __P((int, int));
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static int outcol, outline, destcol, destline;
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/*
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* Sync the position of the output cursor. Most work here is rounding for
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* terminal boundaries getting the column position implied by wraparound or
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* the lack thereof and rolling up the screen to get destline on the screen.
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*/
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int
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__mvcur(ly, lx, y, x, in_refresh)
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int ly, lx, y, x, in_refresh;
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{
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#ifdef DEBUG
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__CTRACE("mvcur: moving cursor from (%d, %d) to (%d, %d)\n",
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ly, lx, y, x);
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#endif
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destcol = x;
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destline = y;
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outcol = lx;
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outline = ly;
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fgoto(in_refresh);
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return (OK);
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}
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static void
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fgoto(in_refresh)
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int in_refresh;
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{
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register int c, l;
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register char *cgp;
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if (destcol >= COLS) {
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destline += destcol / COLS;
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destcol %= COLS;
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}
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if (outcol >= COLS) {
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l = (outcol + 1) / COLS;
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outline += l;
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outcol %= COLS;
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if (AM == 0) {
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while (l > 0) {
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if (__pfast)
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if (CR)
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tputs(CR, 0, __cputchar);
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else
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putchar('\r');
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if (NL)
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tputs(NL, 0, __cputchar);
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else
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putchar('\n');
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l--;
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}
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outcol = 0;
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}
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if (outline > LINES - 1) {
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destline -= outline - (LINES - 1);
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outline = LINES - 1;
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}
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}
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if (destline >= LINES) {
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l = destline;
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destline = LINES - 1;
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if (outline < LINES - 1) {
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c = destcol;
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if (__pfast == 0 && !CA)
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destcol = 0;
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fgoto(in_refresh);
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destcol = c;
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}
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while (l >= LINES) {
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/* The following linefeed (or simulation thereof) is
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* supposed to scroll up the screen, since we are on
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* the bottom line. We make the assumption that
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* linefeed will scroll. If ns is in the capability
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* list this won't work. We should probably have an
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* sc capability but sf will generally take the place
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* if it works.
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*
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* Superbee glitch: in the middle of the screen have
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* to use esc B (down) because linefeed screws up in
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* "Efficient Paging" (what a joke) mode (which is
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* essential in some SB's because CRLF mode puts
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* garbage in at end of memory), but you must use
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* linefeed to scroll since down arrow won't go past
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* memory end. I turned this off after recieving Paul
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* Eggert's Superbee description which wins better.
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*/
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if (NL /* && !XB */ && __pfast)
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tputs(NL, 0, __cputchar);
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else
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putchar('\n');
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l--;
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if (__pfast == 0)
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outcol = 0;
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}
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}
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if (destline < outline && !(CA || UP))
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destline = outline;
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if (CA) {
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cgp = tgoto(CM, destcol, destline);
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/*
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* Need this condition due to inconsistent behavior
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* of backspace on the last column.
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*/
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if (outcol != COLS - 1 && plod(strlen(cgp), in_refresh) > 0)
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plod(0, in_refresh);
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else
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tputs(cgp, 0, __cputchar);
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} else
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plod(0, in_refresh);
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outline = destline;
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outcol = destcol;
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}
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/*
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* Move (slowly) to destination.
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* Hard thing here is using home cursor on really deficient terminals.
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* Otherwise just use cursor motions, hacking use of tabs and overtabbing
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* and backspace.
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*/
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static int plodcnt, plodflg;
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static void
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plodput(c)
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int c;
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{
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if (plodflg)
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--plodcnt;
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else
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putchar(c);
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}
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static int
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plod(cnt, in_refresh)
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int cnt, in_refresh;
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{
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register int i, j, k, soutcol, soutline;
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plodcnt = plodflg = cnt;
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soutcol = outcol;
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soutline = outline;
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/*
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* Consider homing and moving down/right from there, vs. moving
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* directly with local motions to the right spot.
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*/
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if (HO) {
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/*
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* i is the cost to home and tab/space to the right to get to
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* the proper column. This assumes ND space costs 1 char. So
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* i + destcol is cost of motion with home.
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*/
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if (GT)
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i = (destcol / HARDTABS) + (destcol % HARDTABS);
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else
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i = destcol;
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/* j is cost to move locally without homing. */
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if (destcol >= outcol) { /* if motion is to the right */
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j = destcol / HARDTABS - outcol / HARDTABS;
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if (GT && j)
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j += destcol % HARDTABS;
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else
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j = destcol - outcol;
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} else
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/* leftward motion only works if we can backspace. */
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if (outcol - destcol <= i && (BS || BC))
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/* Cheaper to backspace. */
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i = j = outcol - destcol;
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else
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/* Impossibly expensive. */
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j = i + 1;
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/* k is the absolute value of vertical distance. */
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k = outline - destline;
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if (k < 0)
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k = -k;
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j += k;
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/* Decision. We may not have a choice if no UP. */
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if (i + destline < j || (!UP && destline < outline)) {
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/*
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* Cheaper to home. Do it now and pretend it's a
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* regular local motion.
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*/
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tputs(HO, 0, plodput);
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outcol = outline = 0;
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} else if (LL) {
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/*
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* Quickly consider homing down and moving from there.
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* Assume cost of LL is 2.
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*/
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k = (LINES - 1) - destline;
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if (i + k + 2 < j && (k <= 0 || UP)) {
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tputs(LL, 0, plodput);
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outcol = 0;
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outline = LINES - 1;
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}
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}
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} else
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/* No home and no up means it's impossible. */
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if (!UP && destline < outline)
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return (-1);
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if (GT)
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i = destcol % HARDTABS + destcol / HARDTABS;
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else
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i = destcol;
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#ifdef notdef
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if (BT && outcol > destcol &&
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(j = (((outcol+7) & ~7) - destcol - 1) >> 3)) {
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j *= (k = strlen(BT));
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if ((k += (destcol&7)) > 4)
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j += 8 - (destcol&7);
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else
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j += k;
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}
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else
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#endif
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j = outcol - destcol;
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/*
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* If we will later need a \n which will turn into a \r\n by the
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* system or the terminal, then don't bother to try to \r.
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*/
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if ((NONL || !__pfast) && outline < destline)
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goto dontcr;
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/*
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* If the terminal will do a \r\n and there isn't room for it, then
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* we can't afford a \r.
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*/
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if (NC && outline >= destline)
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goto dontcr;
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/*
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* If it will be cheaper, or if we can't back up, then send a return
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* preliminarily.
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*/
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if (j > i + 1 || outcol > destcol && !BS && !BC) {
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/*
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* BUG: this doesn't take the (possibly long) length of CR
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* into account.
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*/
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if (CR)
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tputs(CR, 0, plodput);
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else
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plodput('\r');
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if (NC) {
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if (NL)
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tputs(NL, 0, plodput);
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else
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plodput('\n');
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outline++;
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}
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outcol = 0;
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}
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dontcr: while (outline < destline) {
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outline++;
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if (NL)
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tputs(NL, 0, plodput);
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else
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plodput('\n');
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if (plodcnt < 0)
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goto out;
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if (NONL || __pfast == 0)
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outcol = 0;
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}
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if (BT)
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k = strlen(BT);
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while (outcol > destcol) {
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if (plodcnt < 0)
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goto out;
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#ifdef notdef
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if (BT && outcol - destcol > k + 4) {
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tputs(BT, 0, plodput);
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outcol--;
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outcol &= ~7;
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continue;
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}
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#endif
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outcol--;
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if (BC)
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tputs(BC, 0, plodput);
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else
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plodput('\b');
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}
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while (outline > destline) {
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outline--;
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tputs(UP, 0, plodput);
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if (plodcnt < 0)
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goto out;
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}
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if (GT && destcol - outcol > 1) {
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for (;;) {
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i = tabcol(outcol, HARDTABS);
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if (i > destcol)
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break;
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if (TA)
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tputs(TA, 0, plodput);
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else
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plodput('\t');
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outcol = i;
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}
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if (destcol - outcol > 4 && i < COLS && (BC || BS)) {
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if (TA)
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tputs(TA, 0, plodput);
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else
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plodput('\t');
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outcol = i;
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while (outcol > destcol) {
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outcol--;
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if (BC)
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tputs(BC, 0, plodput);
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else
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plodput('\b');
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}
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}
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}
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while (outcol < destcol) {
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/*
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* Move one char to the right. We don't use ND space because
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* it's better to just print the char we are moving over.
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*/
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if (in_refresh)
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if (plodflg) /* Avoid a complex calculation. */
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plodcnt--;
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else {
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i = curscr->lines[outline]->line[outcol].ch;
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if ((curscr->lines[outline]->line[outcol].attr
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& __STANDOUT) ==
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(curscr->flags & __WSTANDOUT))
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putchar(i);
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else
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goto nondes;
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}
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else
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nondes: if (ND)
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tputs(ND, 0, plodput);
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else
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plodput(' ');
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outcol++;
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if (plodcnt < 0)
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goto out;
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}
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out: if (plodflg) {
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outcol = soutcol;
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outline = soutline;
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}
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return (plodcnt);
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}
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/*
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* Return the column number that results from being in column col and
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* hitting a tab, where tabs are set every ts columns. Work right for
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* the case where col > COLS, even if ts does not divide COLS.
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*/
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static int
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tabcol(col, ts)
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int col, ts;
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{
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int offset;
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if (col >= COLS) {
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offset = COLS * (col / COLS);
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col -= offset;
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} else
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offset = 0;
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return (col + ts - (col % ts) + offset);
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}
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