Add StringPtr struct

Author: adazem009

CMakeLists.txt

@@ -38,6 +38,7 @@ target_sources(scratchcpp
     include/scratchcpp/value.h
     include/scratchcpp/valuedata.h
     include/scratchcpp/value_functions.h
+    include/scratchcpp/stringptr.h
     include/scratchcpp/entity.h
     include/scratchcpp/variable.h
     include/scratchcpp/list.h

include/scratchcpp/stringptr.h

@@ -0,0 +1,32 @@
+// SPDX-License-Identifier: Apache-2.0
+
+#pragma once
+
+#include "global.h"
+
+namespace libscratchcpp
+{
+
+extern "C"
+{
+    /*! \brief The StringPtr struct holds a string data pointer and string size */
+    struct LIBSCRATCHCPP_EXPORT StringPtr
+    {
+            // NOTE: Constructors and destructors only work in C++ code and are not supposed to be used in LLVM IR
+            StringPtr() = default;
+            StringPtr(const StringPtr &) = delete;
+
+            ~StringPtr()
+            {
+                if (data && allocatedSize > 0)
+                    free(data);
+            }
+
+            // NOTE: Any changes must also be done in the LLVM code builder!
+            char16_t *data = nullptr;
+            size_t size = 0;
+            size_t allocatedSize = 0;
+    };
+}
+
+} // namespace libscratchcpp