upstream: add xvasprintf()

OpenBSD-Commit-ID: e5e3671c05c121993b034db935bce1a7aa372247

2 files changed, 17 insertions, 8 deletions

diff --git a/xmalloc.c b/xmalloc.c
index 9cd0127dd..b48d33bbf 100644
--- a/xmalloc.c
+++ b/xmalloc.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: xmalloc.c,v 1.35 2019/06/06 05:13:13 otto Exp $ */
+/* $OpenBSD: xmalloc.c,v 1.36 2019/11/12 22:32:48 djm Exp $ */
 /*
  * Author: Tatu Ylonen <ylo@cs.hut.fi>
  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@@ -96,17 +96,24 @@ xstrdup(const char *str)
 }
 
 int
+xvasprintf(char **ret, const char *fmt, va_list ap)
+{
+	int i;
+
+	i = vasprintf(ret, fmt, ap);
+	if (i < 0 || *ret == NULL)
+		fatal("xvasprintf: could not allocate memory");
+	return i;
+}
+
+int
 xasprintf(char **ret, const char *fmt, ...)
 {
 	va_list ap;
 	int i;
 
 	va_start(ap, fmt);
-	i = vasprintf(ret, fmt, ap);
+	i = xvasprintf(ret, fmt, ap);
 	va_end(ap);
-
-	if (i < 0 || *ret == NULL)
-		fatal("xasprintf: could not allocate memory");
-
-	return (i);
+	return i;
 }
diff --git a/xmalloc.h b/xmalloc.h
index 1d5f62df7..abaf7ada2 100644
--- a/xmalloc.h
+++ b/xmalloc.h
@@ -1,4 +1,4 @@
-/* $OpenBSD: xmalloc.h,v 1.18 2019/06/06 05:13:13 otto Exp $ */
+/* $OpenBSD: xmalloc.h,v 1.19 2019/11/12 22:32:48 djm Exp $ */
 
 /*
  * Author: Tatu Ylonen <ylo@cs.hut.fi>
@@ -24,3 +24,5 @@ char	*xstrdup(const char *);
 int	 xasprintf(char **, const char *, ...)
                 __attribute__((__format__ (printf, 2, 3)))
                 __attribute__((__nonnull__ (2)));
+int	 xvasprintf(char **, const char *, va_list)
+		__attribute__((__nonnull__ (2)));