line_buffer_putc
status_t line_buffer_putc(struct line_buffer &buffer, char c);
line_buffer_putc(source->input_buffer, echoBuffer[i]);
line_buffer_putc(target->input_buffer, buffer[i]);
line_buffer_putc(tty->input_buffer, lastChar);
line_buffer_putc(tty->input_buffer, lastChar);
line_buffer_putc(tty->input_buffer, c);