Add test file for glTF mesh loading

source/Irrlicht/tests/inMemoryFile.cpp

@@ -0,0 +1,54 @@
+#include "inMemoryFile.h"
+
+#include <irrlicht.h>
+
+#include <ios>
+
+namespace irr
+{
+
+namespace io
+{
+
+InMemoryFile::InMemoryFile(const io::path& filename, const std::string& s)
+	: m_filename { filename }
+	, m_sstream { s }
+{
+}
+
+std::size_t InMemoryFile::read(void* buffer, std::size_t sizeToRead)
+{
+	m_sstream.read(reinterpret_cast<char*>(buffer), sizeToRead);
+	return m_sstream.gcount();
+}
+
+bool InMemoryFile::seek(long finalPos, bool relativeMovement)
+{
+	if (relativeMovement) {
+		m_sstream.seekg(finalPos, std::ios::beg);
+	} else {
+		m_sstream.seekg(finalPos);
+	}
+
+	return m_sstream.fail();
+}
+
+long InMemoryFile::getSize() const
+{
+	return m_sstream.str().size();
+}
+
+long InMemoryFile::getPos() const
+{
+	return m_sstream.tellg();
+}
+
+const io::path& InMemoryFile::getFileName() const
+{
+	return m_filename;
+}
+
+} // namespace irr
+
+} // namespace io
+