read_int.c

// The number needs to be parsed from a string
static int
read_int (GDataInputStream *stream)
{
  g_autoptr (GError) error = NULL;
  g_autofree char *string = NULL;
  gint64 num = -1;

  string = g_data_input_stream_read_upto (stream, " \n", 2, NULL, NULL, &error);

  if (error) {
    g_error ("Can't read input: %s", error->message);
  }

  // Skip the space
  g_data_input_stream_read_byte (stream, NULL, &error);

  if (error) {
    g_error ("Can't read input: %s", error->message);
  }

  g_ascii_string_to_signed (string, 10, 0, G_MAXINT, &num, &error);

  if (error) {
    g_error ("Can't read input: %s", error->message);
  }

  return num;
}