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#include "csv.hh"
#include "line.hh"
#include "str.hh"
#include <cstdint>
#include <expected>
#include <memory>
#include <span>
#include <string_view>
#include <utility>
#include <vector>
namespace csv {
namespace {
class ReaderImpl : public Reader {
public:
ReaderImpl(std::unique_ptr<line::Reader> reader, char separator)
: reader_(std::move(reader)), separator_(separator) {}
[[nodiscard]]
std::expected<std::span<std::string_view>, io::ReadError> read() override {
while (true) {
auto line = reader_->read();
if (line.has_value()) {
str::split(line.value(), line_, separator_, /* keep_empty */ true);
if (line_.size() == 1 && line_[0].empty())
continue;
return line_;
}
if (line.error().eof) {
return {};
}
return std::unexpected(line.error().io_error.value());
}
}
[[nodiscard]] uint64_t number() const override { return reader_->number(); }
private:
std::unique_ptr<line::Reader> reader_;
char const separator_;
std::vector<std::string_view> line_;
};
} // namespace
std::unique_ptr<Reader> open(std::unique_ptr<line::Reader> reader,
char separator) {
return std::make_unique<ReaderImpl>(std::move(reader), separator);
}
std::unique_ptr<Reader> open(std::unique_ptr<io::Reader> reader,
char separator) {
return open(line::open(std::move(reader)), separator);
}
} // namespace csv
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