block.h

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#ifndef EXT_FILESYSTEM_CORE_BLOCK_H_
#define EXT_FILESYSTEM_CORE_BLOCK_H_

#include <stdint.h>
#include <stdbool.h>
#include <unistd.h>
#include "inode.h"

struct __attribute__((__packed__)) block_record {
  uint16_t inode_id;
  char* path;
};

struct __attribute__((__packed__)) block_info {
  uint16_t block_id;
  uint16_t inode_id;
  uint8_t records_count;
  uint16_t data_size;
};

struct __attribute__((__packed__)) block {
  struct block_info* block_info;
  struct block_record* block_records;
  char* data;
};

void init_block_record(struct block_record* block_record,
                       const struct superblock* superblock,
                       uint16_t inode_id);

void destruct_block_record(struct block_record* block_record);

void init_block(struct block* block,
                const struct superblock* superblock,
                uint16_t block_id,
                uint16_t inode_id);

void init_block_with_records(struct block* block,
                             const struct superblock* superblock,
                             uint16_t block_id,
                             uint16_t inode_id,
                             uint8_t records_count);

void destruct_block(struct block* block);

ssize_t read_block(int fd,
                   struct block* block,
                   uint16_t block_id,
                   const struct superblock* superblock);

ssize_t write_block(int fd,
                    struct block* block,
                    const struct superblock* superblock);

uint8_t get_max_records_count(const struct superblock* superblock);

uint32_t get_max_data_in_block(const struct superblock* superblock);

uint32_t get_max_data_size_of_all_blocks(const struct superblock* superblock);

uint32_t get_remain_data(const struct block* block,
                         const struct superblock* superblock);

#endif //EXT_FILESYSTEM_CORE_BLOCK_H_