Basic implementation of the roff(7) .ta (define tab stops) request.

This is the first feature made possible by the parser reorganization.
Improves the formatting of the SYNOPSIS in many Xenocara GL manuals.
Also important for ports, as reported by many, including naddy@.

1 files changed, 4 insertions, 2 deletions

diff --git a/term.h b/term.h
index 2121dde6..b69e6715 100644
--- a/term.h
+++ b/term.h
@@ -1,4 +1,4 @@
-/*	$Id: term.h,v 1.119 2017/05/04 22:16:09 schwarze Exp $ */
+/*	$Id: term.h,v 1.120 2017/05/07 17:31:45 schwarze Exp $ */
 /*
  * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
  * Copyright (c) 2011-2015, 2017 Ingo Schwarze <schwarze@openbsd.org>
@@ -64,7 +64,6 @@ struct	termp {
 	size_t		  maxrmargin;	/* Max right margin. */
 	size_t		  maxcols;	/* Max size of buf. */
 	size_t		  offset;	/* Margin offest. */
-	size_t		  tabwidth;	/* Distance of tab positions. */
 	size_t		  col;		/* Bytes in buf. */
 	size_t		  viscol;	/* Chars on current line. */
 	size_t		  trailspace;	/* See termp_flushln(). */
@@ -130,6 +129,9 @@ int		  term_vspan(const struct termp *, const struct roffsu *);
 size_t		  term_strlen(const struct termp *, const char *);
 size_t		  term_len(const struct termp *, size_t);
 
+void		  term_tab_set(const struct termp *, const char *);
+size_t		  term_tab_next(size_t);
+
 void		  term_fontpush(struct termp *, enum termfont);
 void		  term_fontpop(struct termp *);
 void		  term_fontpopq(struct termp *, int);