EMILE/libmap/map_open.c

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/*
*
* (c) 2004-2007 Laurent Vivier <Laurent@lvivier.info>
*
*/
#include <stdlib.h>
#include <stdio.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <string.h>
#include "libmap.h"
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map_t* map_open(device_io_t *device)
{
map_t *map;
int ret;
int blocksize = device->get_blocksize(device);
ASSERT_DD(printf("INTERNAL ERROR: Bad Block 0 size structure\n");
return NULL;)
ASSERT_P(printf("INTERNAL ERROR: Bad Partition size structure\n");
return NULL;)
map = (map_t*)malloc(sizeof(map_t));
if (map == NULL)
return NULL;
map->device = malloc(sizeof(device_io_t));
if (map->device == NULL)
{
free(map);
return NULL;
}
memcpy(map->device, device, sizeof(device_io_t));
ret = device->read_sector(map->device->data, 0,
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&map->drivers, sizeof(map->drivers));
if (ret == -1)
{
free(map);
return NULL;
}
ret = device->read_sector(map->device->data, sizeof(map->drivers) / blocksize,
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&map->partition, sizeof(map->partition));
if (ret == -1)
{
free(map);
return NULL;
}
map->current = 0;
return map;
}