update bundled_deps

bundled_deps/libigl/igl/is_readable.cpp

@@ -0,0 +1,55 @@
+// 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/.
+#include "is_readable.h"
+
+#ifdef _WIN32
+#  include <cstdio>
+IGL_INLINE bool igl::is_readable(const char* filename)
+{
+  FILE * f = fopen(filename,"r");
+  if(f == NULL)
+  {
+    return false;
+  }
+  fclose(f);
+  return true;
+}
+#else
+#  include <sys/stat.h>
+#  include <unistd.h>
+#  include <iostream>
+IGL_INLINE bool igl::is_readable(const char* filename)
+{
+  // Check if file already exists
+  struct stat status;
+  if(stat(filename,&status)!=0)
+  {
+    return false;
+  }
+
+  // Get current users uid and gid
+  uid_t this_uid = getuid();
+  gid_t this_gid = getgid();
+
+  // Dealing with owner
+  if( this_uid == status.st_uid )
+  {
+    return S_IRUSR & status.st_mode;
+  }
+
+  // Dealing with group member
+  if( this_gid == status.st_gid )
+  {
+    return S_IRGRP & status.st_mode;
+  }
+
+  // Dealing with other
+  return S_IROTH & status.st_mode;
+
+}
+#endif