Merged branch 'dev_native' into lm_sla_supports_auto

Added igl library files

src/igl/guess_extension.h

@@ -0,0 +1,25 @@
+#ifndef IGL_GUESS_EXTENSION_H
+#define IGL_GUESS_EXTENSION_H
+#include "igl_inline.h"
+#include <string>
+#include <cstdio>
+namespace igl
+{
+  // Given a file pointer at the beginning of a "mesh" file, try to guess the
+  // extension of the file format it comes from. The file pointer is rewound on
+  // return.
+  //
+  // Inputs:
+  //   fp  file pointer (see output)
+  // Outputs:
+  //   fp  file pointer rewound 
+  //   guess  extension as string. One of "mesh",{"obj"},"off","ply","stl", or
+  //     "wrl"
+  //
+  IGL_INLINE void guess_extension(FILE * fp, std::string & guess);
+  IGL_INLINE std::string guess_extension(FILE * fp);
+}
+#ifndef IGL_STATIC_LIBRARY
+#  include "guess_extension.cpp"
+#endif
+#endif