/*
  data source for libisoburn.

  Copyright 2007 Vreixo Formoso Lopes <metalpain2002@yahoo.es>
*/

#include <assert.h>
#include <stdlib.h>


#ifndef Xorriso_standalonE

#include <libburn/libburn.h>

#include <libisofs/libisofs.h>

#else /* ! Xorriso_standalonE */

#include "../libisofs/libisofs.h"
#include "../libburn/libburn.h"

#endif /* Xorriso_standalonE */


#include "isoburn.h"

static int 
ds_read_block(IsoDataSource *src, uint32_t lba, uint8_t *buffer)
{
 int ret;
 struct burn_drive *d;
 off_t count;

 assert(src && buffer);

 d = (struct burn_drive*)src->data;

 ret = burn_read_data(d, (off_t) lba * (off_t) 2048, (char *) buffer,
                      2048, &count, 0);
 if (ret <= 0 )
   return -1;

 return 1;
}
	
static int
ds_open(IsoDataSource *src)
{
 /* nothing to do, device is always grabbed */
 return 1;
}

static int
ds_close(IsoDataSource *src)
{
 /* nothing to do, device is always grabbed */
 return 1;
}

static void 
ds_free_data(IsoDataSource *src)
{
 /* nothing to do */;
}

IsoDataSource *
isoburn_data_source_new(struct burn_drive *d)
{
 IsoDataSource *ret;
 if (d==NULL)
   return NULL;
 ret = malloc(sizeof(IsoDataSource));
 if (!ret)
   return NULL;
 ret->refcount = 1;
 ret->read_block = ds_read_block;
 ret->open = ds_open;
 ret->close = ds_close;
 ret->free_data = ds_free_data;
 ret->data = d;
 return ret;
}