Refactor folder (#10475)

Move many third-party components' source codes from the src folder to a new folder called deps_src. The goal is to make the code structure clearer and easier to navigate.

deps_src/libigl/igl/matlab/mexErrMsgTxt.h

@@ -0,0 +1,25 @@
+// 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_MATLAB_MEXERRMSGTXT_H
+#define IGL_MATLAB_MEXERRMSGTXT_H
+#include "../igl_inline.h"
+// Overload mexErrMsgTxt to check an assertion then print text only if
+// assertion fails
+#include "mex.h"
+namespace igl
+{
+  namespace matlab
+  {
+    // Wrapper for mexErrMsgTxt that only calls error if test fails
+    IGL_INLINE void mexErrMsgTxt(bool test, const char * message);
+  }
+}
+#ifndef IGL_STATIC_LIBRARY
+#  include "mexErrMsgTxt.cpp"
+#endif
+#endif