csv.hh

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#pragma once
 
// standard library
#include <iosfwd>
#include <string>
#include <string_view>
#include <vector>
 
namespace DiFfRG
{
  struct CsvDialect {
    char separator = ',';
    bool has_header = false;
    char comment = '#';
  };
 
  struct CsvTable {
    std::vector<std::string> header;
    std::vector<std::vector<double>> columns;
 
    size_t n_rows() const;
    size_t n_cols() const;
 
    size_t column_index(std::string_view name) const;
  };
 
  CsvTable read_csv(const std::string &path, const CsvDialect &dialect = {});
 
  CsvTable parse_csv(std::string_view content, const CsvDialect &dialect = {}, std::string_view origin = {});
 
  std::vector<std::string> split_csv_line(std::string_view line, char separator);
 
  double parse_csv_cell(std::string_view field);
 
  void write_csv_header(std::ostream &stream, const std::vector<std::string> &names, const CsvDialect &dialect = {});
 
  void write_csv_row(std::ostream &stream, const std::vector<double> &values, const CsvDialect &dialect = {});
} // namespace DiFfRG