1 // Copyright 2015 The Chromium OS Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef CHROMIUMOS_WIDE_PROFILING_BUFFER_WRITER_H_ 6 #define CHROMIUMOS_WIDE_PROFILING_BUFFER_WRITER_H_ 7 8 #include "data_writer.h" 9 10 namespace quipper { 11 12 // Writes data to a fixed-size memory buffer. 13 class BufferWriter : public DataWriter { 14 public: 15 // The destination buffer is indicated by |buffer| and is |size| bytes long. 16 BufferWriter(void* buffer, size_t size) 17 : buffer_(reinterpret_cast<char*>(buffer)), offset_(0) { 18 size_ = size; 19 } 20 21 void SeekSet(size_t offset) override { offset_ = offset; } 22 23 size_t Tell() const override { return offset_; } 24 25 bool WriteData(const void* src, const size_t size) override; 26 27 bool WriteString(const string& str, const size_t size) override; 28 29 private: 30 bool CanWriteSize(size_t data_size) override; 31 32 // Pointer to the data buffer. Does not own the buffer. 33 char* buffer_; 34 35 // Current write offset, in bytes from start of buffer. 36 size_t offset_; 37 }; 38 39 } // namespace quipper 40 41 #endif // CHROMIUMOS_WIDE_PROFILING_BUFFER_WRITER_H_ 42
