Complete eqn.7 parsing. Features all productions from the original 1975

CACM paper in an LR(1) parse (1 -> eqn_rewind()).  Right now the code is
a little jungly, but will clear up as I consolidate parse components.
The AST structure will also be cleaned up, as right now it's pretty ad
hoc (this won't change the parse itself).  I added the mandoc_strndup()
function will here.

1 files changed, 2 insertions, 1 deletions

diff --git a/libroff.h b/libroff.h
index 226a1dbc..de4c21cb 100644
--- a/libroff.h
+++ b/libroff.h
@@ -1,4 +1,4 @@
-/*	$Id: libroff.h,v 1.23 2011/07/21 10:24:35 kristaps Exp $ */
+/*	$Id: libroff.h,v 1.24 2011/07/21 23:30:39 kristaps Exp $ */
 /*
  * Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
  *
@@ -46,6 +46,7 @@ struct	eqn_node {
 	struct eqn_def	 *defs;
 	size_t		  defsz;
 	char		 *data;
+	size_t		  rew;
 	size_t		  cur;
 	size_t		  sz;
 	struct eqn	  eqn;