/*
 *  ntloader  --  Microsoft Windows NT6+ loader
 *  Copyright (C) 2025  A1ive.
 *
 *  ntloader is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published
 *  by the Free Software Foundation, either version 3 of the License,
 *  or (at your option) any later version.
 *
 *  ntloader is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with ntloader.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef _GPT_PART_H
#define _GPT_PART_H    1

#include <stdint.h>

struct packed_guid
{
    uint32_t data1;
    uint16_t data2;
    uint16_t data3;
    uint8_t data4[8];
} __attribute__ ((packed));
typedef struct packed_guid packed_guid_t;

typedef packed_guid_t gpt_part_guid_t;
typedef packed_guid_t gpt_guid_t;

#define GPT_GUID_INIT(a, b, c, d1, d2, d3, d4, d5, d6, d7, d8)  \
{ \
    (uint32_t) (a), \
    (uint16_t) (b), \
    (uint16_t) (c), \
    { d1, d2, d3, d4, d5, d6, d7, d8 } \
}

#define GPT_PART_TYPE_EMPTY \
GPT_GUID_INIT (0x0, 0x0, 0x0,  \
    0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0)

#define GPT_PART_TYPE_EFI_SYSTEM \
GPT_GUID_INIT (0xc12a7328, 0xf81f, 0x11d2, \
    0xba, 0x4b, 0x00, 0xa0, 0xc9, 0x3e, 0xc9, 0x3b)

#define GPT_PART_TYPE_BIOS_BOOT \
GPT_GUID_INIT (0x21686148, 0x6449, 0x6e6f, \
    0x74, 0x4e, 0x65, 0x65, 0x64, 0x45, 0x46, 0x49)

#define GPT_PART_TYPE_LDM \
GPT_GUID_INIT (0x5808c8aa, 0x7e8f, 0x42e0, \
    0x85, 0xd2, 0xe1, 0xe9, 0x04, 0x34, 0xcf, 0xb3)

#define GPT_PART_TYPE_USR_X86_64 \
GPT_GUID_INIT (0x5dfbf5f4, 0x2848, 0x4bac, \
    0xaa, 0x5e, 0x0d, 0x9a, 0x20, 0xb7, 0x45, 0xa6)

#define GPT_HEADER_MAGIC \
{ 0x45, 0x46, 0x49, 0x20, 0x50, 0x41, 0x52, 0x54 }

#define GPT_HEADER_VERSION (0x00010000U)

struct gpt_header
{
    uint8_t magic[8];
    uint32_t version;
    uint32_t headersize;
    uint32_t crc32;
    uint32_t unused1;
    uint64_t header_lba;
    uint64_t alternate_lba;
    uint64_t start;
    uint64_t end;
    gpt_guid_t guid;
    uint64_t partitions;
    uint32_t maxpart;
    uint32_t entry_size;
    uint32_t entry_crc32;
} __attribute__ ((packed));

struct gpt_part_entry
{
    gpt_part_guid_t type;
    gpt_part_guid_t guid;
    uint64_t start;
    uint64_t end;
    uint64_t attrib;
    uint16_t name[36];
} __attribute__ ((packed));

extern int
check_gpt_partmap (void *disk,
                   int (*disk_read) (void *disk, uint64_t sector,
                                     size_t len, void *buf));

#endif