/* vi:set sts=4 sw=4:
 *
 * VIM - Vi IMproved	by Bram Moolenaar
 *		 BeBox port by Olaf Seibert
 *
 * Do ":help uganda"  in Vim to read copying and usage conditions.
 * Do ":help credits" in Vim to see a list of people who contributed.
 */
/*
 * os_bebox.c  Additional files for BeBox (rest is in os_unix.c)
 */

#include <termios.h>
#include <kernel/OS.h>
// #include <device/KernelExport.h>
#include "vim.h"

    static int
check_for_bebox()
{
    static int checked = 0;
    static int is_bebox = 0;

    if (!checked) {
	system_info si;

	checked = 1;

	get_system_info(&si);
#if 0
	printf("\r\ncpu_count = %d\r\n", si.cpu_count);
	printf("cpu_type = %d\r\n", si.cpu_type);
	printf("cpu_clock_speed = %f\r\n", si.cpu_clock_speed);
	printf("bus_clock_speed = %f\r\n", si.bus_clock_speed);
#endif
	/*
	 * Measured values on my machine:
	 * cpu_clock_speed = 66434214
	 * bus_clock_speed = 33238632
	 */
	if (si.cpu_count == 2 &&
	    ((si.cpu_type == B_CPU_PPC_603  && si.cpu_clock_speed <=  66666666) ||
	     (si.cpu_type == B_CPU_PPC_603e && si.cpu_clock_speed <= 133333333)) &&
	    si.bus_clock_speed <= 33333333) {
	    is_bebox = 1;
	}
	//printf("io card version = %d\r\n", io_card_version());
	if (!is_bebox) {
	    emsg("This program works better on a real BeBox.");
	}
    }
    return is_bebox;
}


/*
 * select() emulation. Hopefully, in DR9 there will be something
 * useful supplied by the system.
 */

int
bebox_select(int nbits,
       struct fd_set *rbits,
       struct fd_set *wbits,
       struct fd_set *ebits,
       struct timeval *timeout)
{
    check_for_bebox();
    if (nbits == 0) {
	/* select is purely being used for delay */
	/* return select(0, NULL, NULL, NULL, timeout); */
	snooze(timeout->tv_sec * 1e6 + timeout->tv_usec);
	return 0;
    }
#if 0
    /*
     * This does not seem to work either. Reads here are not supposed to
     * block indefinitely, yet they do. This is most annoying.
     */
    if (FD_ISSET(0, rbits)) {
	char cbuf[1];
	int count;
	struct termios told;
	struct termios tnew;
	tcgetattr(0, &told);
	tnew = told;
	tnew.c_lflag &= ~ICANON;
	tnew.c_cc[VMIN] = 0;
	tnew.c_cc[VTIME] = timeout->tv_sec * 10 + timeout->tv_usec / 100000;
	tcsetattr(0, TCSANOW, &tnew);

	count = read(0, &cbuf, sizeof(cbuf));
	tcsetattr(0, TCSANOW, &told);
	if (count > 0) {
	add_to_input_buf(&cbuf[0], count);
	return 1;
	}
	return 0;
    }
#endif
    return 0;
}