| // Protocol Buffers - Google's data interchange format |
| // Copyright 2008 Google Inc. All rights reserved. |
| // https://developers.google.com/protocol-buffers/ |
| // |
| // 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 GOOGLE_PROTOBUF_UTIL_ZERO_COPY_SINK_H__ |
| #define GOOGLE_PROTOBUF_UTIL_ZERO_COPY_SINK_H__ |
| |
| #include <cstddef> |
| |
| #include "google/protobuf/stubs/bytestream.h" |
| #include "google/protobuf/io/zero_copy_stream.h" |
| #include "google/protobuf/port.h" |
| |
| // Must be included last. |
| #include "google/protobuf/port_def.inc" |
| |
| namespace google { |
| namespace protobuf { |
| namespace io { |
| namespace zc_sink_internal { |
| // Internal helper class, for turning a ZeroCopyOutputStream into a sink. |
| class PROTOBUF_EXPORT ZeroCopyStreamByteSink : public strings::ByteSink { |
| public: |
| explicit ZeroCopyStreamByteSink(io::ZeroCopyOutputStream* stream) |
| : stream_(stream) {} |
| ZeroCopyStreamByteSink(const ZeroCopyStreamByteSink&) = delete; |
| ZeroCopyStreamByteSink& operator=(const ZeroCopyStreamByteSink&) = delete; |
| |
| ~ZeroCopyStreamByteSink() override { |
| if (buffer_size_ > 0) { |
| stream_->BackUp(buffer_size_); |
| } |
| } |
| |
| void Append(const char* bytes, size_t len) override; |
| void Write(absl::string_view str) { Append(str.data(), str.size()); } |
| |
| size_t bytes_written() { return bytes_written_; } |
| bool failed() { return failed_; } |
| |
| private: |
| io::ZeroCopyOutputStream* stream_; |
| void* buffer_ = nullptr; |
| size_t buffer_size_ = 0; |
| size_t bytes_written_ = 0; |
| bool failed_ = false; |
| }; |
| } // namespace zc_sink_internal |
| } // namespace io |
| } // namespace protobuf |
| } // namespace google |
| |
| #include "google/protobuf/port_undef.inc" |
| #endif // GOOGLE_PROTOBUF_UTIL_ZERO_COPY_SINK_H__ |