gps_interface.h

#pragma once

#include <stdbool.h>
#include <sys/types.h>
#include <termios.h>

#include "gps.h"

enum SERIAL_MODE { USB, LOG_FILE, UDP_PORT };

typedef struct gps_serial_port {
  enum SERIAL_MODE type;
  char *port;
  int open;
  int fd;
  uint64_t timestamp;
  uint64_t first_log_timestamp;
  uint64_t first_real_timestamp;
  off_t read_offset;
} gps_serial_port;

void gps_interface_initialize(gps_serial_port *);

int gps_interface_read(gps_serial_port *port, void *__buf, size_t __nbytes);

int gps_interface_open_serial_port(gps_serial_port *new_serial_port,
                                   const char *port, speed_t speed);
int gps_interface_open_log_file(gps_serial_port *new_serial_port,
                                const char *filename);
int gps_interface_open_udp(gps_serial_port *new_serial_port,
                           const char *ip_and_port);
void gps_interface_close(gps_serial_port *serial_port);

gps_protocol_type gps_interface_get_line(
    gps_serial_port *port,
    unsigned char start_sequence[GPS_MAX_START_SEQUENCE_SIZE],
    int *start_sequence_size, char line[GPS_MAX_LINE_SIZE], int *line_size,
    bool sleep);