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diff --git a/extern/draco/draco/src/draco/core/draco_types.h b/extern/draco/draco/src/draco/core/draco_types.h
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+++ b/extern/draco/draco/src/draco/core/draco_types.h
@@ -0,0 +1,52 @@
+// Copyright 2016 The Draco Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+#ifndef DRACO_CORE_DRACO_TYPES_H_
+#define DRACO_CORE_DRACO_TYPES_H_
+
+#include <stdint.h>
+
+#include <string>
+
+#include "draco/draco_features.h"
+
+namespace draco {
+
+enum DataType {
+  // Not a legal value for DataType. Used to indicate a field has not been set.
+  DT_INVALID = 0,
+  DT_INT8,
+  DT_UINT8,
+  DT_INT16,
+  DT_UINT16,
+  DT_INT32,
+  DT_UINT32,
+  DT_INT64,
+  DT_UINT64,
+  DT_FLOAT32,
+  DT_FLOAT64,
+  DT_BOOL,
+  DT_TYPES_COUNT
+};
+
+int32_t DataTypeLength(DataType dt);
+
+// Equivalent to std::is_integral for draco::DataType. Returns true for all
+// signed and unsigned integer types (including DT_BOOL). Returns false
+// otherwise.
+bool IsDataTypeIntegral(DataType dt);
+
+}  // namespace draco
+
+#endif  // DRACO_CORE_DRACO_TYPES_H_