1 files changed, 61 insertions, 0 deletions
diff --git a/extern/draco/draco/src/draco/core/data_buffer.cc b/extern/draco/draco/src/draco/core/data_buffer.cc
new file mode 100644
index 00000000000..f0b43d67dbd
--- /dev/null
+++ b/extern/draco/draco/src/draco/core/data_buffer.cc
@@ -0,0 +1,61 @@
+// 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.
+//
+#include "draco/core/data_buffer.h"
+
+#include <algorithm>
+
+namespace draco {
+
+DataBuffer::DataBuffer() {}
+
+bool DataBuffer::Update(const void *data, int64_t size) {
+  const int64_t offset = 0;
+  return this->Update(data, size, offset);
+}
+
+bool DataBuffer::Update(const void *data, int64_t size, int64_t offset) {
+  if (data == nullptr) {
+    if (size + offset < 0) {
+      return false;
+    }
+    // If no data is provided, just resize the buffer.
+    data_.resize(size + offset);
+  } else {
+    if (size < 0) {
+      return false;
+    }
+    if (size + offset > static_cast<int64_t>(data_.size())) {
+      data_.resize(size + offset);
+    }
+    const uint8_t *const byte_data = static_cast<const uint8_t *>(data);
+    std::copy(byte_data, byte_data + size, data_.data() + offset);
+  }
+  descriptor_.buffer_update_count++;
+  return true;
+}
+
+void DataBuffer::Resize(int64_t size) {
+  data_.resize(size);
+  descriptor_.buffer_update_count++;
+}
+
+void DataBuffer::WriteDataToStream(std::ostream &stream) {
+  if (data_.size() == 0) {
+    return;
+  }
+  stream.write(reinterpret_cast<char *>(data_.data()), data_.size());
+}
+
+}  // namespace draco