utilities.h

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//
// Copyright RIME Developers
// Distributed under the BSD License
//
// 2013-01-30 GONG Chen <chen.sst@gmail.com>
//
#ifndef RIME_UTILITIES_H_
#define RIME_UTILITIES_H_
 
#include <stdint.h>
#include <boost/crc.hpp>
#include <rime/common.h>
 
namespace rime {
 
int CompareVersionString(const string& x, const string& y);
 
class ChecksumComputer {
 public:
  explicit ChecksumComputer(uint32_t initial_remainder = 0);
  void ProcessFile(const path& file_path);
  uint32_t Checksum();
 
 private:
  boost::crc_32_type crc_;
  static constexpr size_t buffer_size = 64 * 1024;  // 64 KB
};
 
inline uint32_t Checksum(const path& file_path) {
  ChecksumComputer c;
  c.ProcessFile(file_path);
  return c.Checksum();
}
 
}  // namespace rime
 
#endif  // RIME_UTILITIES_H_