// Copyright 2015 The Chromium OS 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 CHROMIUMOS_WIDE_PROFILING_BUFFER_READER_H_
|
#define CHROMIUMOS_WIDE_PROFILING_BUFFER_READER_H_
|
|
#include "data_reader.h"
|
|
namespace quipper {
|
|
// Read from a fixed-size data buffer. Does not take ownership of the buffer.
|
class BufferReader : public DataReader {
|
public:
|
// The data source is indicated by |buffer| and is |size| bytes long.
|
BufferReader(const void* buffer, size_t size)
|
: buffer_(reinterpret_cast<const char*>(buffer)), offset_(0) {
|
size_ = size;
|
}
|
|
void SeekSet(size_t offset) override { offset_ = offset; }
|
|
size_t Tell() const override { return offset_; }
|
|
bool ReadData(const size_t size, void* dest) override;
|
|
// Reads |size| bytes of the buffer as a null-terminated string into |str|.
|
// Trailing nulls, if any, are not added to the string, but they are skipped
|
// over. If there is no null terminator within these |size| bytes, then the
|
// string is automatically terminated after |size| bytes.
|
bool ReadString(const size_t size, string* str) override;
|
|
private:
|
// The data buffer from which to read.
|
const char* buffer_;
|
|
// Data read offset from the start of |buffer_|.
|
size_t offset_;
|
};
|
|
} // namespace quipper
|
|
#endif // CHROMIUMOS_WIDE_PROFILING_BUFFER_READER_H_
|
