Partial Windows port by Ruben Van Boxem

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@140328 91177308-0d34-0410-b5e6-96231b3b80d8

src/support/win32/support.cpp

@@ -0,0 +1,22 @@
+// -*- C++ -*-
+//===--------------------------- support/win32/support.h --------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+int vasprintf( char **sptr, const char *__restrict__ fmt, va_list ap )
+{
+    *sptr = NULL
+    int count = vsnprintf( *sptr, 0, fmt, ap );
+    if( (count >= 0) && ((*sptr = malloc(count+1)) != NULL) )
+    {
+        vsprintf( *sptr, fmt, ap );
+        sptr[count] = '\0';
+    }
+
+    return count;
+}