===================================================================
RCS file: /cvs/mandoc/out.c,v
retrieving revision 1.4
retrieving revision 1.5
diff -u -p -r1.4 -r1.5
--- mandoc/out.c	2009/10/09 06:54:11	1.4
+++ mandoc/out.c	2009/10/18 19:02:10	1.5
@@ -1,4 +1,4 @@
-/*	$Id: out.c,v 1.4 2009/10/09 06:54:11 kristaps Exp $ */
+/*	$Id: out.c,v 1.5 2009/10/18 19:02:10 kristaps Exp $ */
 /*
  * Copyright (c) 2009 Kristaps Dzonsons <kristaps@kth.se>
  *
@@ -25,31 +25,18 @@
 
 /* 
  * Convert a `scaling unit' to a consistent form, or fail.  Scaling
- * units are documented in groff.7, which stipulates the following:
- *
- *  (1) A scaling unit is a signed/unsigned integer/float with or
- *      without a unit.
- *
- *  (2) The following units exist:
- *	c	Centimeter
- *	i	Inch
- *	P	Pica = 1/6 inch
- *	p	Point = 1/72 inch
- *	m	Em = the font size in points (width of letter m)
- *	M	100th of an Em 
- *	n	En = Em/2 
- *	u	Basic unit for actual output device
- *	v	Vertical line space in basic units scaled point =
- *		1/sizescale of a point (defined in font DESC file)
- *	f	Scale by 65536.
+ * units are documented in groff.7, mdoc.7, man.7.
  */
 int
-a2roffsu(const char *src, struct roffsu *dst)
+a2roffsu(const char *src, struct roffsu *dst, enum roffscale def)
 {
 	char		 buf[BUFSIZ], hasd;
 	int		 i;
 	enum roffscale	 unit;
 
+	if ('\0' == *src)
+		return(0);
+
 	i = hasd = 0;
 
 	switch (*src) {
@@ -63,6 +50,9 @@ a2roffsu(const char *src, struct roffsu *dst)
 		break;
 	}
 
+	if ('\0' == *src)
+		return(0);
+
 	while (i < BUFSIZ) {
 		if ( ! isdigit((u_char)*src)) {
 			if ('.' != *src)
@@ -103,7 +93,10 @@ a2roffsu(const char *src, struct roffsu *dst)
 		unit = SCALE_EM;
 		break;
 	case ('\0'):
-		/* FALLTHROUGH */
+		if (SCALE_MAX == def)
+			return(0);
+		unit = SCALE_BU;
+		break;
 	case ('u'):
 		unit = SCALE_BU;
 		break;