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/*
*
* Copyright 2015-2016, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#ifndef GRPCXX_SUPPORT_BYTE_BUFFER_H
#define GRPCXX_SUPPORT_BYTE_BUFFER_H
#include <grpc/grpc.h>
#include <grpc/byte_buffer.h>
#include <grpc/support/log.h>
#include <grpc++/impl/serialization_traits.h>
#include <grpc++/support/config.h>
#include <grpc++/support/slice.h>
#include <grpc++/support/status.h>
#include <vector>
namespace grpc {
/// A sequence of bytes.
class ByteBuffer GRPC_FINAL {
public:
/// Constuct an empty buffer.
ByteBuffer() : buffer_(nullptr) {}
/// Construct buffer from \a slices, of which there are \a nslices.
ByteBuffer(const Slice* slices, size_t nslices);
/// Constuct a byte buffer by referencing elements of existing buffer
/// \a buf. Wrapper of core function grpc_byte_buffer_copy
ByteBuffer(const ByteBuffer& buf);
~ByteBuffer();
ByteBuffer& operator=(const ByteBuffer&);
/// Dump (read) the buffer contents into \a slices.
void Dump(std::vector<Slice>* slices) const;
/// Remove all data.
void Clear();
/// Buffer size in bytes.
size_t Length() const;
private:
friend class SerializationTraits<ByteBuffer, void>;
// takes ownership
void set_buffer(grpc_byte_buffer* buf) {
if (buffer_) {
Clear();
}
buffer_ = buf;
}
// For \a SerializationTraits's usage.
grpc_byte_buffer* buffer() const { return buffer_; }
grpc_byte_buffer* buffer_;
};
template <>
class SerializationTraits<ByteBuffer, void> {
public:
static Status Deserialize(grpc_byte_buffer* byte_buffer, ByteBuffer* dest,
int max_message_size) {
dest->set_buffer(byte_buffer);
return Status::OK;
}
static Status Serialize(const ByteBuffer& source, grpc_byte_buffer** buffer,
bool* own_buffer) {
*buffer = source.buffer();
*own_buffer = false;
return Status::OK;
}
};
} // namespace grpc
#endif // GRPCXX_SUPPORT_BYTE_BUFFER_H
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