Project import generated by Copybara.
PiperOrigin-RevId: 237361882
Change-Id: I109a68f44db867b20f8c6a7732b0ce657133e52a
diff --git a/quic/platform/api/quic_mem_slice_span.h b/quic/platform/api/quic_mem_slice_span.h
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+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef QUICHE_QUIC_PLATFORM_API_QUIC_MEM_SLICE_SPAN_H_
+#define QUICHE_QUIC_PLATFORM_API_QUIC_MEM_SLICE_SPAN_H_
+
+#include "net/third_party/quiche/src/quic/platform/api/quic_export.h"
+#include "net/quic/platform/impl/quic_mem_slice_span_impl.h"
+
+namespace quic {
+
+// QuicMemSliceSpan is effectively wrapper around an array of data structures
+// used as QuicMemSlice. So it could implemented with:
+// QuicMemSlice* slices_;
+// size_t num_slices_;
+// But for efficiency reasons, the actual implementation is an array of
+// platform-specific objects. This could avoid the translation from
+// platform-specific object to QuicMemSlice.
+// QuicMemSliceSpan does not own the underling data buffers.
+class QUIC_EXPORT_PRIVATE QuicMemSliceSpan {
+ public:
+ explicit QuicMemSliceSpan(QuicMemSliceSpanImpl impl) : impl_(impl) {}
+
+ QuicMemSliceSpan(const QuicMemSliceSpan& other) = default;
+ QuicMemSliceSpan& operator=(const QuicMemSliceSpan& other) = default;
+ QuicMemSliceSpan(QuicMemSliceSpan&& other) = default;
+ QuicMemSliceSpan& operator=(QuicMemSliceSpan&& other) = default;
+
+ ~QuicMemSliceSpan() = default;
+
+ // Save data buffers to |send_buffer| and returns the amount of saved data.
+ // |send_buffer| will hold a reference to all data buffer.
+ QuicByteCount SaveMemSlicesInSendBuffer(QuicStreamSendBuffer* send_buffer) {
+ return impl_.SaveMemSlicesInSendBuffer(send_buffer);
+ }
+
+ // Save data buffers as message data in |message_frame|. |message_frame| will
+ // hold a reference to all data buffers.
+ void SaveMemSlicesAsMessageData(QuicMessageFrame* message_frame) {
+ impl_.SaveMemSlicesAsMessageData(message_frame);
+ }
+
+ // Return data of the span at |index| by the form of a QuicStringPiece.
+ QuicStringPiece GetData(int index) { return impl_.GetData(index); }
+
+ // Return the total length of the data inside the span.
+ QuicByteCount total_length() { return impl_.total_length(); }
+
+ // Return total number of slices in the span.
+ size_t NumSlices() { return impl_.NumSlices(); }
+
+ bool empty() const { return impl_.empty(); }
+
+ private:
+ QuicMemSliceSpanImpl impl_;
+};
+
+} // namespace quic
+
+#endif // QUICHE_QUIC_PLATFORM_API_QUIC_MEM_SLICE_SPAN_H_
