harvey/sys/src/cmd/htmlroff/t14.c

#include "a.h"

/*
 * 14. Three-part titles.
 */
void
r_lt(int argc, Rune **argv)
{
	Rune *p;
	
	if(argc < 2)
		nr(L(".lt"), evalscale(L("6.5i"), 'm'));
	else{
		if(argc > 2)
			warn("too many arguments for .lt");
		p = argv[1];
		if(p[0] == '-')
			nr(L(".lt"), getnr(L(".lt"))-evalscale(p+1, 'm'));
		else if(p[0] == '+')
			nr(L(".lt"), getnr(L(".lt"))+evalscale(p+1, 'm'));
		else
			nr(L(".lt"), evalscale(p, 'm'));
	}
}

void
t14init(void)
{
	addreq(L("tl"), r_warn, -1);
	addreq(L("pc"), r_nop, -1);	/* page number char */
	addreq(L("lt"), r_lt, -1);
}