===================================================================
RCS file: /cvs/mandoc/term.c,v
retrieving revision 1.119
retrieving revision 1.122
diff -u -p -r1.119 -r1.122
--- mandoc/term.c	2009/10/30 18:53:09	1.119
+++ mandoc/term.c	2009/11/05 08:40:16	1.122
@@ -1,4 +1,4 @@
-/*	$Id: term.c,v 1.119 2009/10/30 18:53:09 kristaps Exp $ */
+/*	$Id: term.c,v 1.122 2009/11/05 08:40:16 kristaps Exp $ */
 /*
  * Copyright (c) 2008, 2009 Kristaps Dzonsons <kristaps@kth.se>
  *
@@ -15,6 +15,7 @@
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 #include <assert.h>
+#include <ctype.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -78,7 +79,7 @@ term_alloc(enum termenc enc)
 
 	p = calloc(1, sizeof(struct termp));
 	if (NULL == p) {
-		fprintf(stderr, "memory exhausted\n");
+		perror(NULL);
 		exit(EXIT_FAILURE);
 	}
 	p->maxrmargin = 78;
@@ -229,7 +230,12 @@ term_flushln(struct termp *p)
 		for ( ; i < (int)p->col; i++) {
 			if (' ' == p->buf[i])
 				break;
-			putchar(p->buf[i]);
+
+			/* The unit sep. is a non-breaking space. */
+			if (31 == p->buf[i])
+				putchar(' ');
+			else
+				putchar(p->buf[i]);
 		}
 		vis += vsz;
 	}
@@ -368,7 +374,7 @@ do_reserved(struct termp *p, const char *word, size_t 
 static void
 do_escaped(struct termp *p, const char **word)
 {
-	int		 j, type;
+	int		 j, type, sv;
 	const char	*wp;
 
 	wp = *word;
@@ -423,16 +429,29 @@ do_escaped(struct termp *p, const char **word)
 		}
 
 		switch (*wp) {
+		case ('3'):
+			/* FALLTHROUGH */
 		case ('B'):
-			p->bold++;
+			p->metamask = p->metafont;
+			p->metafont |= METAF_BOLD;
 			break;
+		case ('2'):
+			/* FALLTHROUGH */
 		case ('I'):
-			p->under++;
+			p->metamask = p->metafont;
+			p->metafont |= METAF_UNDER;
 			break;
 		case ('P'):
+			sv = p->metamask;
+			p->metamask = p->metafont;
+			p->metafont = sv;
+			break;
+		case ('1'):
 			/* FALLTHROUGH */
 		case ('R'):
-			p->bold = p->under = 0;
+			p->metamask = p->metafont;
+			p->metafont &= ~METAF_UNDER;
+			p->metafont &= ~METAF_BOLD;
 			break;
 		default:
 			break;
@@ -545,7 +564,7 @@ buffer(struct termp *p, char c)
 		s = p->maxcols * 2;
 		p->buf = realloc(p->buf, s);
 		if (NULL == p->buf) {
-			fprintf(stderr, "memory exhausted\n");
+			perror(NULL);
 			exit(EXIT_FAILURE);
 		}
 		p->maxcols = s;
@@ -558,12 +577,12 @@ static void
 encode(struct termp *p, char c)
 {
 	
-	if (' ' != c) {
-		if (p->under) {
+	if (isgraph((u_char)c)) {
+		if (p->under || METAF_UNDER & p->metafont) {
 			buffer(p, '_');
 			buffer(p, 8);
 		}
-		if (p->bold) {
+		if (p->bold || METAF_BOLD & p->metafont) {
 			buffer(p, c);
 			buffer(p, 8);
 		}