From a4a04f932ed99a8195f6d44227b1e89f5b9ea381 Mon Sep 17 00:00:00 2001
From: Ben Noordhuis <info@bnoordhuis.nl>
Date: Sun, 1 Apr 2012 01:15:17 +0200
Subject: [PATCH] node: provide snprintf implementation on windows

_snprintf() doesn't zero-terminate the buffer on overflow.
---
 src/node_internals.h | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/src/node_internals.h b/src/node_internals.h
index 0646727e1b..8d073927b8 100644
--- a/src/node_internals.h
+++ b/src/node_internals.h
@@ -27,7 +27,17 @@
 namespace node {
 
 #ifdef _WIN32
-# define snprintf _snprintf
+// emulate snprintf() on windows, _snprintf() doesn't zero-terminate the buffer
+// on overflow...
+#include <stdarg.h>
+inline static int snprintf(char* buf, unsigned int len, const char* fmt, ...) {
+  va_list ap;
+  va_start(ap, fmt);
+  int n = _vsprintf_p(buf, len, fmt, ap);
+  if (len) buf[len - 1] = '\0';
+  va_end(ap);
+  return n;
+}
 #endif
 
 #ifndef offset_of