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#ifndef LIBFILEZILLA_ASCII_LAYER_HEADER
#define LIBFILEZILLA_ASCII_LAYER_HEADER
#include "buffer.hpp"
#include "socket.hpp"
#include <optional>
/** \file
* \brief Declares \ref fz::ascii_layer
*/
namespace fz {
/**
* A socket layer that transforms between line endings.
*
* When sending, LF not preceeded by CR is converted into CRLF. Stray CRs are kept.
* When receiving, CRs followed by LF are removed. As with sending, stray CRs ar kept.
*/
class FZ_PUBLIC_SYMBOL ascii_layer final : public socket_layer, protected fz::event_handler
{
public:
ascii_layer(event_loop& loop, event_handler* handler, socket_interface& next_layer);
virtual ~ascii_layer();
virtual int read(void *buffer, unsigned int size, int& error) override;
virtual int write(void const* buffer, unsigned int size, int& error) override;
virtual int shutdown() override;
virtual void set_event_handler(event_handler* handler, fz::socket_event_flag retrigger_block = fz::socket_event_flag{}) override;
private:
virtual FZ_PRIVATE_SYMBOL void operator()(fz::event_base const& ev) override;
void FZ_PRIVATE_SYMBOL on_socket_event(socket_event_source* s, socket_event_flag t, int error);
std::optional<uint8_t> tmp_read_;
buffer buffer_;
bool was_cr_{};
bool write_blocked_by_send_buffer_{};
bool waiting_read_{};
};
}
#endif
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