IO redirection

  1. output_hook set_putchar_vector(output_hook)

    Sets indirection vector for character output. This function gets and returns a pointer to a function receiving char and returning void. This feature allows redirection of outputs to virtually any device, and to save the previous output vector. The output vector is not initialized, so this function must be used prior any output.
    output_hook is defined by typedef void (*output_hook)(char) ;

  2. input_hook set_getchar_vector(input_hook)

    Sets indirection vector for character intput. This function gets and returns a pointer to a function returning char and receiving void. This feature allows redirection of inputs from virtually any device, and to save the previous intput vector. The intput vector is not initialized, so this function must be used prior any input.
    input_hook is defined by typedef char (*input_hook)() ;



AG 2013-04-10