/////////////////////////////////////////////////////////////////////////
// $Id: cdrom_beos.cc,v 1.3 2008/01/26 22:24:00 sshwarts Exp $
/////////////////////////////////////////////////////////////////////////

#include <SupportDefs.h>
#include <Drivers.h>

#include <sys/stat.h>
#include <unistd.h>

#include "cdrom_beos.h"

int
GetLogicalBlockSize(int fd)
{
    partition_info  p_info;

    if (ioctl(fd, B_GET_PARTITION_INFO, &p_info) == B_NO_ERROR)
    {
    	//dprintf("GetLogicalBlockSize: ioctl suceed\n");
		return p_info.logical_block_size;
	}
    else //dprintf("GetLogicalBlockSize = ioctl returned error\n");
	return 0;
}

int
GetDeviceBlockSize(int fd)
{
    struct stat     st;
    device_geometry dg;

    if (ioctl(fd, B_GET_GEOMETRY, &dg) < 0)
    {
		if (fstat(fd, &st) < 0 || S_ISDIR(st.st_mode))
	    	return 0;
		return 512;   /* just assume it's a plain old file or something */
    }

    return dg.bytes_per_sector;
}

off_t
GetNumDeviceBlocks(int fd, int block_size)
{
    struct stat			st;
    device_geometry		dg;

    if (ioctl(fd, B_GET_GEOMETRY, &dg) >= 0)
    {
		return (off_t)dg.cylinder_count *
	       (off_t)dg.sectors_per_track *
	       (off_t)dg.head_count;
    }

    /* if the ioctl fails, try just stat'ing in case it's a regular file */
    if (fstat(fd, &st) < 0)
	return 0;

    return st.st_size / block_size;
}
