mdocml: Accomodate for hard-spaces with tildes.

[kristaps@mdocml.bsd.lv]

Log Message:
-----------
Accomodate for hard-spaces with tildes.  For now, consider them regular
spaces.  Also allow for tabs.  Finally, have the parser correctly handle
open and close brackets smooshed against other terms.  All of these
handle "details" noted in the CACM paper.

Modified Files:
--------------
    mdocml:
        eqn.c

Revision Data
-------------
Index: eqn.c
===================================================================
RCS file: /usr/vhosts/mdocml.bsd.lv/cvs/mdocml/eqn.c,v
retrieving revision 1.21
retrieving revision 1.22
diff -Leqn.c -Leqn.c -u -p -r1.21 -r1.22
--- eqn.c
+++ eqn.c
@@ -453,11 +453,11 @@ eqn_next(struct eqn_node *ep, char quote
 {
 	char		*start, *next;
 	int		 q, diff, lim;
-	size_t		 ssz;
+	size_t		 ssz, dummy;
 	struct eqn_def	*def;
 
 	if (NULL == sz)
-		sz = &ssz;
+		sz = &dummy;
 
 	lim = 0;
 	ep->rew = ep->cur;
@@ -482,14 +482,26 @@ again:
 	}
 
 	start = &ep->data[(int)ep->cur];
-	next = q ? strchr(start, quote) : strchr(start, ' ');
+
+	if ( ! q) {
+		if ('{' == *start || '}' == *start)
+			ssz = 1;
+		else
+			ssz = strcspn(start + 1, " ~\"{}\t") + 1;
+		next = start + (int)ssz;
+		if ('\0' == *next)
+			next = NULL;
+	} else
+		next = strchr(start, quote);
 
 	if (NULL != next) {
 		*sz = (size_t)(next - start);
 		ep->cur += *sz;
 		if (q)
 			ep->cur++;
-		while (' ' == ep->data[(int)ep->cur])
+		while (' ' == ep->data[(int)ep->cur] ||
+				'\t' == ep->data[(int)ep->cur] ||
+				'~' == ep->data[(int)ep->cur])
 			ep->cur++;
 	} else {
 		if (q)
--
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