20060303a

1 files changed, 34 insertions, 0 deletions

diff --git a/libkern/vsnprint.c b/libkern/vsnprint.c
new file mode 100644
index 00000000..841d142c
--- /dev/null
+++ b/libkern/vsnprint.c
@@ -0,0 +1,34 @@
+/*
+ * The authors of this software are Rob Pike and Ken Thompson.
+ *              Copyright (c) 2002 by Lucent Technologies.
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose without fee is hereby granted, provided that this entire notice
+ * is included in all copies of any software which is or includes a copy
+ * or modification of this software and in all copies of the supporting
+ * documentation for such software.
+ * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR IMPLIED
+ * WARRANTY.  IN PARTICULAR, NEITHER THE AUTHORS NOR LUCENT TECHNOLOGIES MAKE ANY
+ * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE MERCHANTABILITY
+ * OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR PURPOSE.
+ */
+#include "lib9.h"
+
+int
+vsnprint(char *buf, int len, char *fmt, va_list args)
+{
+	Fmt f;
+
+	if(len <= 0)
+		return -1;
+	f.runes = 0;
+	f.start = buf;
+	f.to = buf;
+	f.stop = buf + len - 1;
+	f.flush = nil;
+	f.farg = nil;
+	f.nfmt = 0;
+	f.args = args;
+	dofmt(&f, fmt);
+	*(char*)f.to = '\0';
+	return (char*)f.to - buf;
+}