BSD 2 development

[unix-history] / src / ex / ex_put.c.new

fgoto()
{
	register int l, c;

	if (destcol > COLUMNS - 1) {
		destline += destcol / COLUMNS;
		destcol %= COLUMNS;
	}
	if (outcol > COLUMNS - 1) {
		l = (outcol + 1) / COLUMNS;
		outline += l;
		outcol %= COLUMNS;
		if (AM == 0) {
			while (l > 0) {
				if (pfast)
					putch('\r');
				putch('\n');
				l--;
			}
			outcol = 0;
		}
		if (outline > LINES - 1) {
			destline -= outline - (LINES - 1);
			outline = LINES - 1;
		}
	}
	if (destline > LINES - 1) {
		l = destline;
		destline = LINES - 1;
		if (outline < LINES - 1) {
			c = destcol;
			if (pfast == 0 && (!CA || holdcm))
				destcol = 0;
			fgoto();
			destcol = c;
		}
		while (l > LINES - 1) {
			putch('\n');
			l--;
			if (pfast == 0)
				outcol = 0;
		}
	}
	if (destline < outline && !(CA && !holdcm || UP != NOSTR))
		destline = outline;
	if (CA && !holdcm) {
		char *cgp;

		cgp = tgoto(CM, destcol, destline);
		if (plod(strlen(cgp)) > 0)
			plod(0);
		else
			tputs(cgp, 0, putch);
	} else
		plod(0);
	outline = destline;
	outcol = destcol;
}

/*
 * Tab to column col by flushing and then setting destcol.
 * Used by "set all".
 */
tab(col)
	int col;
{

	flush1();
	destcol = col;
}

/*
 * Move (slowly) to destination.
 * Hard thing here is using home cursor on really deficient terminals.
 * Otherwise just use cursor motions, hacking use of tabs and overtabbing
 * and backspace.
 */

static int plodcnt, plodflg;

plodput(c)
{
	if (plodflg)
		plodcnt--;
	else
		putch(c);
}

plod(cnt)
{
	register int i, j, k;
	int soutcol, soutline, sdestcol, sdestline;

	plodcnt = plodflg = cnt;
	soutcol = outcol;
	soutline = outline;
	sdestcol = destcol;
	sdestline = destline;
	if (HO) {
		if (GT)
			i = (destcol >> 3) + (destcol & 07);
		else
			i = destcol;
		if (destcol >= outcol)
			if (GT && (j = ((destcol - (outcol &~ 07)) >> 3)))
				j += destcol & 07;
			else
				j = destcol - outcol;
		else
			if (outcol - destcol <= i && (BS || BC))
				i = j = outcol - destcol;
			else
				j = i + 1;
		k = outline - destline;
		if (k < 0)
			k = -k;
		j += k;
		if (i + destline < j) {
			tputs(HO, 0, plodput);
			outcol = outline = 0;
		} else if (LL) {
			k = (LINES - 1) - destline;
			if (i + k + 2 < j) {
				tputs(LL, 0, plodput);
				outcol = 0;
				outline = LINES - 1;
			}
		}
	}
	if (GT)
		i = (destcol >> 3) + (destcol & 07);
	else
		i = destcol;
	if (BT && outcol > destcol) {
		j = (((outcol+7) & ~7) - destcol - 1) >> 3;
		j *= (k = strlen(BT));
		if ((k = (destcol&7)+k) > 4)
			j += 8 - (destcol&7);
		else
			j += k;
	}
	else
		j = outcol - destcol;
	if ((!NONL || outline >= destline) && (!NC || outline < destline) &&
	    (j > i + 1 || outcol > destcol && !BS && !BC)) {
		plodput('\r');
		if (NC) {
			plodput('\n');
			outline++;
		}
		outcol = 0;
	}
	while (outline < destline) {
		outline++;
		plodput('\n');
		if (plodflg && plodcnt < 0)
			goto out;
		if (NONL || pfast == 0)
			outcol = 0;
	}
	if (BT)
		k = strlen(BT);
	while (outcol > destcol) {
		if (plodflg && plodcnt < 0)
			goto out;
		if (BT && outcol - destcol > 4+k) {
			tputs(BT, 0, plodput);
			outcol--;
			outcol &= ~7;
			continue;
		}
		outcol--;
		if (BC)
			tputs(BC, 0, plodput);
		else
			plodput('\b');
	}
	while (outline > destline) {
		outline--;
		tputs(UP, 0, plodput);
		if (plodflg && plodcnt < 0)
			goto out;
	}
	if (GT && destcol - outcol > 1) {
		while ((i = ((outcol + 8) &~ 7)) <= destcol) {
			if (TA)
				tputs(TA, 0, plodput);
			else
				plodput('\t');
			outcol = i;
		}
		if (destcol - outcol > 4 && (BC || BS)) {
			if (TA)
				tputs(TA, 0, plodput);
			else
				plodput('\t');
			outcol = i;
			while (outcol > destcol) {
				outcol--;
				if (BC)
					tputs(BC, 0, plodput);
				else
					plodput('\b');
			}
		}
	}
	while (outcol < destcol) {
		if (inopen && ND)
			tputs(ND, 0, plodput);
		else
			plodput(' ');
		outcol++;
		if (plodflg && plodcnt < 0)
			goto out;
	}
out:
	if (plodflg) {
		outcol = soutcol;
		outline = soutline;
		destcol = sdestcol;
		destline = sdestline;
	}
	return(plodcnt);
}