// This file is part of noxos and licensed under the MIT open source license

#ifndef NOXOS_GPT_H
#define NOXOS_GPT_H

#include "utils/stdtypes.h"
#include "utils/string.h"

typedef enum {
    GPT_PARTITION_GUID_UNUSED,
    GPT_PARTITION_GUID_UNKNOWN,
    GPT_PARTITION_GUID_PRIMARY,
    GPT_PARTITION_GUID_EFI_SYSTEM,

    GPT_PARTITION_GUID_ENUM_END
} gpt_partition_type_guids_E;

typedef struct {
    uint8_t     signature               [8];
    uint32_t    revision;
    uint32_t    header_size;
    uint32_t    checksum_crc32;
    uint32_t    reserved;
    uint64_t    current_lba;
    uint64_t    backup_lba;
    uint64_t    first_usable_lba;
    uint64_t    last_usable_lba;
    uint8_t     disk_guid               [16];
    uint64_t    starting_lba;
    uint32_t    num_partitions;
    uint32_t    partition_entry_size;
    uint32_t    partition_entry_crc32;
    uint8_t     reserved2               [0x1A4];
}__attribute__((packed)) gpt_table_header_T;

typedef struct {
    uint8_t     partition_type_guid     [16];
    uint8_t     partition_guid          [16];
    uint64_t    starting_lba;
    uint64_t    ending_lba;
    uint64_t    attributes;
    uint16_t    name                    [36]; // UTF-16 encoded
}__attribute__((packed)) gpt_partition_entry_T;

gpt_partition_type_guids_E  gpt_get_partition_type      (uint8_t guid[16]);
string_t                    gpt_partition_type_to_string(gpt_partition_type_guids_E type);

extern uint8_t g_gpt_partition_type_guides[GPT_PARTITION_GUID_ENUM_END][16];

#endif //NOXOS_GPT_H