#include "kpartx.h"

#include "byteorder.h"

#include <stdio.h>

#include <string.h>

#include "mac.h"

int

read_mac_pt(int fd, __attribute__((unused)) struct slice all,

	    struct slice *sp, unsigned int ns) {

	struct mac_driver_desc *md;

	struct mac_partition *part;

	unsigned secsize;

	char *data;

	unsigned int blk, blocks_in_map;

	int n = 0;

	md = (struct mac_driver_desc *) getblock(fd, 0);

	if (md == NULL)

		return -1;

	if (be16_to_cpu(md->signature) != MAC_DRIVER_MAGIC)

		return -1;

	secsize = be16_to_cpu(md->block_size);

	data = getblock(fd, secsize/512);

	if (!data)

		return -1;

	part = (struct mac_partition *) (data + secsize%512);

	if (be16_to_cpu(part->signature) != MAC_PARTITION_MAGIC)

		return -1;

	blocks_in_map = be32_to_cpu(part->map_count);

	for (blk = 1; blk <= blocks_in_map && blk <= ns; ++blk, ++n) {

		int pos = blk * secsize;

		data = getblock(fd, pos/512);

		if (!data)

			return -1;

		part = (struct mac_partition *) (data + pos%512);

		if (be16_to_cpu(part->signature) != MAC_PARTITION_MAGIC)

			break;

		sp[n].start = be32_to_cpu(part->start_block) * (secsize/512);

		sp[n].size = be32_to_cpu(part->block_count) * (secsize/512);

	}

	return n;

}