===================================================================
RCS file: /cvs/mandoc/roff.c,v
retrieving revision 1.268
retrieving revision 1.271
diff -u -p -r1.268 -r1.271
--- mandoc/roff.c	2015/04/19 14:57:38	1.268
+++ mandoc/roff.c	2015/05/31 23:13:22	1.271
@@ -1,4 +1,4 @@
-/*	$Id: roff.c,v 1.268 2015/04/19 14:57:38 schwarze Exp $ */
+/*	$Id: roff.c,v 1.271 2015/05/31 23:13:22 schwarze Exp $ */
 /*
  * Copyright (c) 2008-2012, 2014 Kristaps Dzonsons <kristaps@bsd.lv>
  * Copyright (c) 2010-2015 Ingo Schwarze <schwarze@openbsd.org>
@@ -397,8 +397,7 @@ static	enum rofferr	 roff_cond_text(ROFF_ARGS);
 static	enum rofferr	 roff_cond_sub(ROFF_ARGS);
 static	enum rofferr	 roff_ds(ROFF_ARGS);
 static	enum rofferr	 roff_eqndelim(struct roff *, struct buf *, int);
-static	int		 roff_evalcond(struct roff *r, int,
-				const char *, int *);
+static	int		 roff_evalcond(struct roff *r, int, char *, int *);
 static	int		 roff_evalnum(struct roff *, int,
 				const char *, int *, int *, int);
 static	int		 roff_evalpar(struct roff *, int,
@@ -415,6 +414,8 @@ static	int		 roff_getregn(const struct roff *,
 static	int		 roff_getregro(const char *name);
 static	const char	*roff_getstrn(const struct roff *,
 				const char *, size_t);
+static	int		 roff_hasregn(const struct roff *,
+				const char *, size_t);
 static	enum rofferr	 roff_insec(ROFF_ARGS);
 static	enum rofferr	 roff_it(ROFF_ARGS);
 static	enum rofferr	 roff_line_ignore(ROFF_ARGS);
@@ -1022,6 +1023,7 @@ roff_node_append(struct roff_man *man, struct roff_nod
 		/* NOTREACHED */
 	}
 	n->parent->nchild++;
+	n->parent->last = n;
 
 	/*
 	 * Copy over the normalised-data pointer of our parent.  Not
@@ -1230,6 +1232,52 @@ roff_node_delete(struct roff_man *man, struct roff_nod
 	roff_node_free(n);
 }
 
+void
+deroff(char **dest, const struct roff_node *n)
+{
+	char	*cp;
+	size_t	 sz;
+
+	if (n->type != ROFFT_TEXT) {
+		for (n = n->child; n != NULL; n = n->next)
+			deroff(dest, n);
+		return;
+	}
+
+	/* Skip leading whitespace and escape sequences. */
+
+	cp = n->string;
+	while (*cp != '\0') {
+		if ('\\' == *cp) {
+			cp++;
+			mandoc_escape((const char **)&cp, NULL, NULL);
+		} else if (isspace((unsigned char)*cp))
+			cp++;
+		else
+			break;
+	}
+
+	/* Skip trailing whitespace. */
+
+	for (sz = strlen(cp); sz; sz--)
+		if ( ! isspace((unsigned char)cp[sz-1]))
+			break;
+
+	/* Skip empty strings. */
+
+	if (sz == 0)
+		return;
+
+	if (*dest == NULL) {
+		*dest = mandoc_strndup(cp, sz);
+		return;
+	}
+
+	mandoc_asprintf(&cp, "%s %*s", *dest, (int)sz, cp);
+	free(*dest);
+	*dest = cp;
+}
+
 /* --- main functions of the roff parser ---------------------------------- */
 
 /*
@@ -2087,8 +2135,10 @@ out:
  * or string condition.
  */
 static int
-roff_evalcond(struct roff *r, int ln, const char *v, int *pos)
+roff_evalcond(struct roff *r, int ln, char *v, int *pos)
 {
+	char	*cp, *name;
+	size_t	 sz;
 	int	 number, savepos, wanttrue;
 
 	if ('!' == v[*pos]) {
@@ -2111,13 +2161,16 @@ roff_evalcond(struct roff *r, int ln, const char *v, i
 		/* FALLTHROUGH */
 	case 'e':
 		/* FALLTHROUGH */
-	case 'r':
-		/* FALLTHROUGH */
 	case 't':
 		/* FALLTHROUGH */
 	case 'v':
 		(*pos)++;
 		return(!wanttrue);
+	case 'r':
+		cp = name = v + ++*pos;
+		sz = roff_getname(r, &cp, ln, *pos);
+		*pos = cp - v;
+		return((sz && roff_hasregn(r, name, sz)) == wanttrue);
 	default:
 		break;
 	}
@@ -2576,6 +2629,26 @@ roff_getregn(const struct roff *r, const char *name, s
 		if (len == reg->key.sz &&
 		    0 == strncmp(name, reg->key.p, len))
 			return(reg->val);
+
+	return(0);
+}
+
+static int
+roff_hasregn(const struct roff *r, const char *name, size_t len)
+{
+	struct roffreg	*reg;
+	int		 val;
+
+	if ('.' == name[0] && 2 == len) {
+		val = roff_getregro(name + 1);
+		if (-1 != val)
+			return(1);
+	}
+
+	for (reg = r->regtab; reg; reg = reg->next)
+		if (len == reg->key.sz &&
+		    0 == strncmp(name, reg->key.p, len))
+			return(1);
 
 	return(0);
 }