V9/cmd/troff/n2.c

/*
 * n2.c
 *
 * output, cleanup
 */

#include "tdef.h"
#include <ctype.h>
#include <signal.h>
#ifdef NROFF
#include "tw.h"
#endif
#include <setjmp.h>
#include "ext.h"

extern	jmp_buf	sjbuf;
int	toolate;
int	error;
extern int	nchtab;

pchar(i)
	register tchar i;
{
	register int j;
	static int hx = 0;	/* records if have seen HX */

	if (hx) {
		hx = 0;
		j = absmot(i);
		if (isnmot(i)) {
			if (j > dip->blss)
				dip->blss = j;
		} else {
			if (j > dip->alss)
				dip->alss = j;
			ralss = dip->alss;
		}
		return;
	}
	if (ismot(i)) {
		pchar1(i); 
		return;
	}
	switch (j = cbits(i)) {
	case 0:
	case IMP:
	case RIGHT:
	case LEFT:
		return;
	case HX:
		hx = 1;
		return;
	case PRESC:
		if (dip == &d[0])
			j = eschar;	/* fall through */
	default:
		setcbits(i, trtab[j]);
	}
	pchar1(i);
}


pchar1(i)
	register tchar i;
{
	register j;

	j = cbits(i);
	if (dip != &d[0]) {
		wbf(i);
		dip->op = offset;
		return;
	}
	if (!tflg && !print) {
		if (j == '\n')
			dip->alss = dip->blss = 0;
		return;
	}
	if (no_out || j == FILLER)
		return;
	if (tflg) {	/* transparent mode, undiverted */
		fdprintf(ptid, "%c", j);
		return;
	}
#ifndef NROFF
	if (ascii)
		outascii(i);
	else
#endif
		ptout(i);
}

outascii(i)	/* print i in best-guess ascii */
	tchar i;
{
	int j = cbits(i);

	if (ismot(i)) {
		oput(' ');
		return;
	}
	if (j < 0177 && j >= ' ' || j == '\n') {
		oput(j);
		return;
	}
	if (j == DRAWFCN)
		oputs("\\D");
	else if (j == HYPHEN || j == MINUS)
		oput('-');
	else if (j == XON)
		oputs("\\X");
	else if (j == LIG_FI)
		oputs("fi");
	else if (j == LIG_FL)
		oputs("fl");
	else if (j == LIG_FF)
		oputs("ff");
	else if (j == LIG_FFI)
		oputs("ffi");
	else if (j == LIG_FFL)
		oputs("ffl");
	else if (j == WORDSP)
		;	/* nothing at all */
	else if (j > 0177 && j < nchtab + 128-32) {
		oput('\\');
		oput('(');
		oput(chname[chtab[j-128]]);
		oput(chname[chtab[j-128]+1]);
	} else if (j >= nchtab + 128) {
		char buf[10];
		sprintf(buf, "N%d", j - (nchtab+128));
		oputs(buf);
	}
}


/*
 * now a macro
oput(i)
	register int	i;
{
	*obufp++ = i;
	if (obufp >= &obuf[OBUFSZ])
		flusho();
}
*/

oputs(i)
register char	*i;
{
	while (*i != 0)
		oput(*i++);
}


flusho()
{
	if (obufp == obuf)
		return;
	if (no_out == 0) {
		if (!toolate) {
			toolate++;
#ifdef NROFF
			set_tty();
			{
				char	*p = t.twinit;
				while (*p++)
					;
				if (p - t.twinit > 1)
					write(ptid, t.twinit, p - t.twinit - 1);
			}
#endif
		}
		toolate += write(ptid, obuf, (int)(obufp - obuf));
	}
	obufp = obuf;
}


done(x) 
int	x;
{
	register i;

	error |= x;
	app = ds = lgf = 0;
	if (i = em) {
		donef = -1;
		em = 0;
		if (control(i, 0))
			longjmp(sjbuf, 1);
	}
	if (!nfo)
		done3(0);
	mflg = 0;
	dip = &d[0];
	if (woff)
		wbt((tchar)0);
	if (pendw)
		getword(1);
	pendnf = 0;
	if (donef == 1)
		done1(0);
	donef = 1;
	ip = 0;
	frame = stk;
	nxf = frame + 1;
	if (!ejf)
		tbreak();
	nflush++;
	eject((struct s *)0);
	longjmp(sjbuf, 1);
}


done1(x) 
int	x; 
{
	error |= x;
	if (numtab[NL].val) {
		trap = 0;
		eject((struct s *)0);
		longjmp(sjbuf, 1);
	}
	if (nofeed) {
		ptlead();
		flusho();
		done3(0);
	} else {
		if (!gflag)
			pttrailer();
		done2(0);
	}
}


done2(x) 
int	x; 
{
	ptlead();
#ifndef NROFF
	if (!ascii)
		ptstop();
#endif
	flusho();
	done3(x);
}

done3(x) 
int	x;
{
	error |= x;
	signal(SIGINT, SIG_IGN);
	signal(SIGTERM, SIG_IGN);
	unlink(unlkp);
#ifdef NROFF
	twdone();
#endif
	exit(error);
}


edone(x) 
int	x;
{
	frame = stk;
	nxf = frame + 1;
	ip = 0;
	done(x);
}



casepi()
{
	register i;
	int	id[2];

	if (toolate || skip() || !getname() || pipe(id) == -1 || (i = fork()) == -1) {
		errprint("Pipe not created.");
		return;
	}
	ptid = id[1];
	if (i > 0) {
		close(id[0]);
		toolate++;
		pipeflg++;
		return;
	}
	close(0);
	dup(id[0]);
	close(id[1]);
	execl(nextf, nextf, 0);
	errprint("Cannot exec %s", nextf);
	exit(-4);
}