58 lines
1.6 KiB
C
58 lines
1.6 KiB
C
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// Protocol Buffers - Google's data interchange format
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// Copyright 2008 Google Inc. All rights reserved.
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//
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file or at
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// https://developers.google.com/open-source/licenses/bsd
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#ifndef GOOGLE_PROTOBUF_UTIL_ZERO_COPY_SINK_H__
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#define GOOGLE_PROTOBUF_UTIL_ZERO_COPY_SINK_H__
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#include <cstddef>
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#include "google/protobuf/io/zero_copy_stream.h"
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#include "google/protobuf/port.h"
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// Must be included last.
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#include "google/protobuf/port_def.inc"
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namespace google {
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namespace protobuf {
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namespace io {
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namespace zc_sink_internal {
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// Internal helper class, for turning a ZeroCopyOutputStream into a sink.
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class PROTOBUF_EXPORT ZeroCopyStreamByteSink {
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public:
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explicit ZeroCopyStreamByteSink(io::ZeroCopyOutputStream* stream)
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: stream_(stream) {}
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ZeroCopyStreamByteSink(const ZeroCopyStreamByteSink&) = delete;
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ZeroCopyStreamByteSink& operator=(const ZeroCopyStreamByteSink&) = delete;
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~ZeroCopyStreamByteSink() {
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if (buffer_size_ > 0) {
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stream_->BackUp(buffer_size_);
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}
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}
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void Append(const char* bytes, size_t len);
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void Write(absl::string_view str) { Append(str.data(), str.size()); }
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size_t bytes_written() { return bytes_written_; }
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bool failed() { return failed_; }
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private:
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io::ZeroCopyOutputStream* stream_;
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void* buffer_ = nullptr;
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size_t buffer_size_ = 0;
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size_t bytes_written_ = 0;
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bool failed_ = false;
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};
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} // namespace zc_sink_internal
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} // namespace io
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} // namespace protobuf
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} // namespace google
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#include "google/protobuf/port_undef.inc"
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#endif // GOOGLE_PROTOBUF_UTIL_ZERO_COPY_SINK_H__
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