Another 25% speedup for mandocdb(8) -Q mode, found with gprof(1).

For /usr/share/man, we only need 56% of the time of makewhatis(8) now.

In groff, user-defined macros clashing with mdoc(7) or man(7)
standard macros are cleared when parsing the .Dd or .TH macro,
respectively.  Of course, we continue doing that in standard mode
to assure full groff bug compatibility.

However, in -Q mode, full groff bug compatibility makes no sense
when it's unreasonably expensive, so skip this step in -Q mode.
Real-world manuals hardly ever redefine standard macros,
that's terrible style, and if they do, it's pointless to do so
before .Dd or .TH because it has no effect.  Even if someone does,
it's extremely unlikely to break mandocdb(8) -Q parsing because we
abort the parse sequence after the NAME section, anyway.

So if you manually redefine .Sh, .Nm, .Nd, or .SH in a way that doesn't
work at all and rely on .Dd or .TH to fix it up for you, your broken
manual will no longer get a perfect apropos(1) entry until you re-run
mandocdb(8) without -Q.  It think that consequence is acceptable
in order to get a 25% speedup for everyone else.

1 files changed, 7 insertions, 5 deletions

diff --git a/roff.c b/roff.c
index 42240d21..a3e638e8 100644
--- a/roff.c
+++ b/roff.c
@@ -1,7 +1,7 @@
-/*	$Id: roff.c,v 1.189 2013/12/30 18:44:06 schwarze Exp $ */
+/*	$Id: roff.c,v 1.190 2014/01/06 21:34:31 schwarze Exp $ */
 /*
  * Copyright (c) 2010, 2011, 2012 Kristaps Dzonsons <kristaps@bsd.lv>
- * Copyright (c) 2010, 2011, 2012, 2013 Ingo Schwarze <schwarze@openbsd.org>
+ * Copyright (c) 2010-2014 Ingo Schwarze <schwarze@openbsd.org>
  *
  * Permission to use, copy, modify, and distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
@@ -109,6 +109,7 @@ struct	roffreg {
 struct	roff {
 	enum mparset	 parsetype; /* requested parse type */
 	struct mparse	*parse; /* parse point */
+	int		 quick; /* skip standard macro deletion */
 	struct roffnode	*last; /* leaf of stack */
 	enum roffrule	 rstack[RSTACK_MAX]; /* stack of !`ie' rules */
 	char		 control; /* control character */
@@ -468,7 +469,7 @@ roff_free(struct roff *r)
 
 
 struct roff *
-roff_alloc(enum mparset type, struct mparse *parse)
+roff_alloc(enum mparset type, struct mparse *parse, int quick)
 {
 	struct roff	*r;
 	int		 i;
@@ -476,6 +477,7 @@ roff_alloc(enum mparset type, struct mparse *parse)
 	r = mandoc_calloc(1, sizeof(struct roff));
 	r->parsetype = type;
 	r->parse = parse;
+	r->quick = quick;
 	r->rstackpos = -1;
 	
 	roffhash_init();
@@ -1497,7 +1499,7 @@ roff_Dd(ROFF_ARGS)
 {
 	const char *const	*cp;
 
-	if (MPARSE_MDOC != r->parsetype)
+	if (0 == r->quick && MPARSE_MDOC != r->parsetype)
 		for (cp = __mdoc_reserved; *cp; cp++)
 			roff_setstr(r, *cp, NULL, 0);
 
@@ -1510,7 +1512,7 @@ roff_TH(ROFF_ARGS)
 {
 	const char *const	*cp;
 
-	if (MPARSE_MDOC != r->parsetype)
+	if (0 == r->quick && MPARSE_MDOC != r->parsetype)
 		for (cp = __man_reserved; *cp; cp++)
 			roff_setstr(r, *cp, NULL, 0);