Merged branch 'dev_native' into lm_sla_supports_auto

Added igl library files

src/igl/is_writable.h

@@ -0,0 +1,28 @@
+// This file is part of libigl, a simple c++ geometry processing library.
+// 
+// Copyright (C) 2013 Alec Jacobson <alecjacobson@gmail.com>
+// 
+// This Source Code Form is subject to the terms of the Mozilla Public License 
+// v. 2.0. If a copy of the MPL was not distributed with this file, You can 
+// obtain one at http://mozilla.org/MPL/2.0/.
+#ifndef IGL_IS_WRITABLE_H
+#define IGL_IS_WRITABLE_H
+#include "igl_inline.h"
+namespace igl
+{
+  // Check if a file exists *and* is writable like PHP's is_writable function:
+  // http://www.php.net/manual/en/function.is-writable.php
+  // Input:
+  //   filename  path to file
+  // Returns true if file exists and is writable and false if file doesn't
+  // exist or *is not writable*
+  //
+  // Note: Windows version will not test group and user id
+  IGL_INLINE bool is_writable(const char * filename);
+}
+
+#ifndef IGL_STATIC_LIBRARY
+#  include "is_writable.cpp"
+#endif
+
+#endif