tsv.h

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//
// Copyright RIME Developers
// Distributed under the BSD License
//
// 2013-04-16 GONG Chen <chen.sst@gmail.com>
//
#ifndef RIME_TSV_H_
#define RIME_TSV_H_
 
#include <rime/common.h>
 
namespace rime {
 
using Tsv = vector<string>;
 
using TsvParser = function<bool(const Tsv& row, string* key, string* value)>;
 
using TsvFormatter =
    function<bool(const string& key, const string& value, Tsv* row)>;
 
class Sink;
class Source;
 
class TsvReader {
 public:
  TsvReader(const path& file_path, TsvParser parser)
      : file_path_(file_path), parser_(parser) {}
  // return number of records read
  int operator()(Sink* sink);
 
 protected:
  path file_path_;
  TsvParser parser_;
};
 
class TsvWriter {
 public:
  TsvWriter(const path& file_path, TsvFormatter formatter)
      : file_path_(file_path), formatter_(formatter) {}
  // return number of records written
  int operator()(Source* source);
 
 protected:
  path file_path_;
  TsvFormatter formatter_;
 
 public:
  string file_description;
};
 
template <class SinkType>
int operator<<(SinkType& sink, TsvReader& reader) {
  return reader(&sink);
}
 
template <class SinkType>
int operator>>(TsvReader& reader, SinkType& sink) {
  return reader(&sink);
}
 
template <class SourceType>
int operator<<(TsvWriter& writer, SourceType& source) {
  return writer(&source);
}
 
template <class SourceType>
int operator>>(SourceType& source, TsvWriter& writer) {
  return writer(&source);
}
 
}  // namespace rime
 
#endif  // RIME_TSV_H_