From 92d36306307652f916347656b5c31928db651c45 Mon Sep 17 00:00:00 2001
From: Kristaps Dzonsons <kristaps@bsd.lv>
Date: Tue, 24 Aug 2010 13:56:51 +0000
Subject: Handle nested, recursive mathematical subexpressions.  This is
 definitely not general, but it's good enough for pod2man definitions (after I
 clean up the roff, which will be addressed in later fixes).

---
 mandoc.c | 27 +++++++++++++++++++++++++--
 1 file changed, 25 insertions(+), 2 deletions(-)

(limited to 'mandoc.c')

diff --git a/mandoc.c b/mandoc.c
index 78b2967d..b8d07d07 100644
--- a/mandoc.c
+++ b/mandoc.c
@@ -1,4 +1,4 @@
-/*	$Id: mandoc.c,v 1.32 2010/08/24 13:39:37 kristaps Exp $ */
+/*	$Id: mandoc.c,v 1.33 2010/08/24 13:56:51 kristaps Exp $ */
 /*
  * Copyright (c) 2008, 2009, 2010 Kristaps Dzonsons <kristaps@bsd.lv>
  *
@@ -128,6 +128,27 @@ mandoc_special(char *p)
 			p++;
 		} 
 		
+		/* Handle embedded numerical subexp or escape. */
+
+		if ('(' == *p) {
+			while (*p && ')' != *p)
+				if ('\\' == *p++) {
+					i = mandoc_special(--p);
+					if (0 == i)
+						return(0);
+					p += i;
+				}
+
+			if (')' == *p++)
+				break;
+
+			return(0);
+		} else if ('\\' == *p) {
+			if (0 == (i = mandoc_special(p)))
+				return(0);
+			p += i;
+		}
+
 		break;
 #if 0
 	case ('Y'):
@@ -172,7 +193,9 @@ mandoc_special(char *p)
 	case ('z'):
 		len = 1;
 		if ('\\' == *p) {
-			p += mandoc_special(p);
+			if (0 == (i = mandoc_special(p)))
+				return(0);
+			p += i;
 			return(*p ? (int)(p - sv) : 0);
 		}
 		break;
-- 
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