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GCMemcard.h
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GCMemcard.h
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// Copyright 2008 Dolphin Emulator Project
// Licensed under GPLv2+
// Refer to the license.txt file included.
#pragma once
#include <algorithm>
#include <array>
#include <string>
#include <vector>
#include "Common/CommonTypes.h"
#include "Common/NandPaths.h"
#include "Common/Swap.h"
#include "Common/Timer.h"
#include "Core/HW/EXI/EXI_DeviceIPL.h"
#include "Core/HW/Sram.h"
namespace File
{
class IOFile;
}
#define BE64(x) (Common::swap64(x))
#define BE32(x) (Common::swap32(x))
#define BE16(x) (Common::swap16(x))
#define ArrayByteSwap(a) (ByteSwap(a, a + sizeof(u8)));
enum
{
SLOT_A = 0,
SLOT_B = 1,
GCI = 0,
SUCCESS,
NOMEMCARD,
OPENFAIL,
OUTOFBLOCKS,
OUTOFDIRENTRIES,
LENGTHFAIL,
INVALIDFILESIZE,
TITLEPRESENT,
DIRLEN = 0x7F,
SAV = 0x80,
SAVFAIL,
GCS = 0x110,
GCSFAIL,
FAIL,
WRITEFAIL,
DELETE_FAIL,
MC_FST_BLOCKS = 0x05,
MBIT_TO_BLOCKS = 0x10,
DENTRY_STRLEN = 0x20,
DENTRY_SIZE = 0x40,
BLOCK_SIZE = 0x2000,
BAT_SIZE = 0xFFB,
MemCard59Mb = 0x04,
MemCard123Mb = 0x08,
MemCard251Mb = 0x10,
Memcard507Mb = 0x20,
MemCard1019Mb = 0x40,
MemCard2043Mb = 0x80,
CI8SHARED = 1,
RGB5A3,
CI8,
};
class MemoryCardBase
{
public:
explicit MemoryCardBase(int card_index = 0, int size_mbits = MemCard2043Mb)
: m_card_index(card_index), m_nintendo_card_id(size_mbits)
{
}
virtual ~MemoryCardBase() {}
virtual s32 Read(u32 src_address, s32 length, u8* dest_address) = 0;
virtual s32 Write(u32 dest_address, s32 length, const u8* src_address) = 0;
virtual void ClearBlock(u32 address) = 0;
virtual void ClearAll() = 0;
virtual void DoState(PointerWrap& p) = 0;
u32 GetCardId() const { return m_nintendo_card_id; }
bool IsAddressInBounds(u32 address) const { return address <= (m_memory_card_size - 1); }
protected:
int m_card_index;
u16 m_nintendo_card_id;
u32 m_memory_card_size;
};
struct GCMBlock
{
GCMBlock() { Erase(); }
void Erase() { memset(block, 0xFF, BLOCK_SIZE); }
u8 block[BLOCK_SIZE];
};
void calc_checksumsBE(const u16* buf, u32 length, u16* csum, u16* inv_csum);
#pragma pack(push, 1)
struct Header // Offset Size Description
{
// Serial in libogc
std::array<u8, 12> m_serial; // 0x0000 12 ?
Common::BigEndianValue<u64> m_format_time; // 0x000c 8 Time of format (OSTime value)
u32 m_sram_bias; // 0x0014 4 SRAM bias at time of format
Common::BigEndianValue<u32> m_sram_language; // 0x0018 4 SRAM language
std::array<u8, 4> m_unknown_2; // 0x001c 4 ? almost always 0
// end Serial in libogc
Common::BigEndianValue<u16>
m_device_id; // 0x0020 2 0 if formated in slot A 1 if formated in slot B
Common::BigEndianValue<u16> m_size_mb; // 0x0022 2 Size of memcard in Mbits
Common::BigEndianValue<u16> m_encoding; // 0x0024 2 Encoding (Windows-1252 or Shift JIS)
std::array<u8, 468> m_unused_1; // 0x0026 468 Unused (0xff)
u16 m_update_counter; // 0x01fa 2 Update Counter (?, probably unused)
u16 m_checksum; // 0x01fc 2 Additive Checksum
u16 m_checksum_inv; // 0x01fe 2 Inverse Checksum
std::array<u8, 7680> m_unused_2; // 0x0200 0x1e00 Unused (0xff)
void CARD_GetSerialNo(u32* serial1, u32* serial2) const
{
u32 serial[8];
for (int i = 0; i < 8; i++)
{
memcpy(&serial[i], (u8*)this + (i * 4), 4);
}
*serial1 = serial[0] ^ serial[2] ^ serial[4] ^ serial[6];
*serial2 = serial[1] ^ serial[3] ^ serial[5] ^ serial[7];
}
// Nintendo format algorithm.
// Constants are fixed by the GC SDK
// Changing the constants will break memory card support
explicit Header(int slot = 0, u16 sizeMb = MemCard2043Mb, bool shift_jis = false)
{
memset(this, 0xFF, BLOCK_SIZE);
m_size_mb = sizeMb;
m_encoding = shift_jis ? 1 : 0;
u64 rand = Common::Timer::GetLocalTimeSinceJan1970() - ExpansionInterface::CEXIIPL::GC_EPOCH;
m_format_time = rand;
for (int i = 0; i < 12; i++)
{
rand = (((rand * (u64)0x0000000041c64e6dULL) + (u64)0x0000000000003039ULL) >> 16);
m_serial[i] = (u8)(g_SRAM.settings_ex.flash_id[slot][i] + (u32)rand);
rand = (((rand * (u64)0x0000000041c64e6dULL) + (u64)0x0000000000003039ULL) >> 16);
rand &= (u64)0x0000000000007fffULL;
}
m_sram_bias = g_SRAM.settings.rtc_bias;
m_sram_language = static_cast<u32>(g_SRAM.settings.language);
// TODO: determine the purpose of m_unknown_2
// 1 works for slot A, 0 works for both slot A and slot B
memset(m_unknown_2.data(), 0,
m_unknown_2.size()); // = _viReg[55]; static vu16* const _viReg = (u16*)0xCC002000;
m_device_id = 0;
calc_checksumsBE((u16*)this, 0xFE, &m_checksum, &m_checksum_inv);
}
};
static_assert(sizeof(Header) == BLOCK_SIZE);
struct DEntry
{
static const u8 DENTRY_SIZE = 0x40;
DEntry() { memset(this, 0xFF, DENTRY_SIZE); }
std::string GCI_FileName() const
{
std::string filename =
std::string(reinterpret_cast<const char*>(m_makercode.data()), m_makercode.size()) + '-' +
std::string(reinterpret_cast<const char*>(m_gamecode.data()), m_gamecode.size()) + '-' +
reinterpret_cast<const char*>(m_filename.data()) + ".gci";
return Common::EscapeFileName(filename);
}
static constexpr std::array<u8, 4> UNINITIALIZED_GAMECODE = {0xFF, 0xFF, 0xFF, 0xFF};
std::array<u8, 4> m_gamecode; // 0x00 0x04 Gamecode
std::array<u8, 2> m_makercode; // 0x04 0x02 Makercode
u8 m_unused_1; // 0x06 0x01 reserved/unused (always 0xff, has no effect)
u8 m_banner_and_icon_flags; // 0x07 0x01 banner gfx format and icon animation (Image Key)
// Bit(s) Description
// 2 Icon Animation 0: forward 1: ping-pong
// 1 [--0: No Banner 1: Banner present--] WRONG! YAGCD LIES!
// 0 [--Banner Color 0: RGB5A3 1: CI8--] WRONG! YAGCD LIES!
// bits 0 and 1: image format
// 00 no banner
// 01 CI8 banner
// 10 RGB5A3 banner
// 11 ? maybe ==00? Time Splitters 2 and 3 have it and don't have banner
//
std::array<u8, DENTRY_STRLEN> m_filename; // 0x08 0x20 Filename
Common::BigEndianValue<u32>
m_modification_time; // 0x28 0x04 Time of file's last modification in seconds since
// 12am, January 1st, 2000
Common::BigEndianValue<u32> m_image_offset; // 0x2c 0x04 image data offset
Common::BigEndianValue<u16> m_icon_format; // 0x30 0x02 icon gfx format (2bits per icon)
// Bits Description
// 00 No icon
// 01 CI8 with a shared color palette after the last frame
// 10 RGB5A3
// 11 CI8 with a unique color palette after itself
//
Common::BigEndianValue<u16>
m_animation_speed; // 0x32 0x02 Animation speed (2bits per icon) (*1)
// Bits Description
// 00 No icon
// 01 Icon lasts for 4 frames
// 10 Icon lasts for 8 frames
// 11 Icon lasts for 12 frames
//
u8 m_file_permissions; // 0x34 0x01 File-permissions
// Bit Permission Description
// 4 no move File cannot be moved by the IPL
// 3 no copy File cannot be copied by the IPL
// 2 public Can be read by any game
//
u8 m_copy_counter; // 0x35 0x01 Copy counter (*2)
Common::BigEndianValue<u16>
m_first_block; // 0x36 0x02 Block no of first block of file (0 == offset 0)
Common::BigEndianValue<u16>
m_block_count; // 0x38 0x02 File-length (number of blocks in file)
std::array<u8, 2> m_unused_2; // 0x3a 0x02 Reserved/unused (always 0xffff, has no effect)
Common::BigEndianValue<u32>
m_comments_address; // 0x3c 0x04 Address of the two comments within the file data
// (*3)
};
static_assert(sizeof(DEntry) == DENTRY_SIZE);
struct Directory
{
std::array<DEntry, DIRLEN> m_dir_entries; // 0x0000 Directory Entries (max 127)
std::array<u8, 0x3a> m_padding;
Common::BigEndianValue<u16> m_update_counter; // 0x1ffa 2 Update Counter
u16 m_checksum; // 0x1ffc 2 Additive Checksum
u16 m_checksum_inv; // 0x1ffe 2 Inverse Checksum
Directory()
{
memset(this, 0xFF, BLOCK_SIZE);
m_update_counter = 0;
m_checksum = BE16(0xF003);
m_checksum_inv = 0;
}
void Replace(DEntry d, int idx)
{
m_dir_entries[idx] = d;
fixChecksums();
}
void fixChecksums() { calc_checksumsBE((u16*)this, 0xFFE, &m_checksum, &m_checksum_inv); }
};
static_assert(sizeof(Directory) == BLOCK_SIZE);
struct BlockAlloc
{
u16 m_checksum; // 0x0000 2 Additive Checksum
u16 m_checksum_inv; // 0x0002 2 Inverse Checksum
Common::BigEndianValue<u16> m_update_counter; // 0x0004 2 Update Counter
u16 m_free_blocks; // 0x0006 2 Free Blocks
u16 m_last_allocated_block; // 0x0008 2 Last allocated Block
u16 m_map[BAT_SIZE]; // 0x000a 0x1ff8 Map of allocated Blocks
u16 GetNextBlock(u16 Block) const;
u16 NextFreeBlock(u16 MaxBlock, u16 StartingBlock = MC_FST_BLOCKS) const;
bool ClearBlocks(u16 StartingBlock, u16 Length);
void fixChecksums()
{
calc_checksumsBE((u16*)&m_update_counter, 0xFFE, &m_checksum, &m_checksum_inv);
}
explicit BlockAlloc(u16 sizeMb = MemCard2043Mb)
{
memset(this, 0, BLOCK_SIZE);
m_free_blocks = BE16((sizeMb * MBIT_TO_BLOCKS) - MC_FST_BLOCKS);
m_last_allocated_block = BE16(4);
fixChecksums();
}
u16 AssignBlocksContiguous(u16 length)
{
u16 starting = BE16(m_last_allocated_block) + 1;
if (length > BE16(m_free_blocks))
return 0xFFFF;
u16 current = starting;
while ((current - starting + 1) < length)
{
m_map[current - 5] = BE16(current + 1);
current++;
}
m_map[current - 5] = 0xFFFF;
m_last_allocated_block = BE16(current);
m_free_blocks = BE16(BE16(m_free_blocks) - length);
fixChecksums();
return starting;
}
};
static_assert(sizeof(BlockAlloc) == BLOCK_SIZE);
#pragma pack(pop)
class GCIFile
{
public:
bool LoadSaveBlocks();
bool HasCopyProtection() const
{
if ((strcmp(reinterpret_cast<const char*>(m_gci_header.m_filename.data()), "PSO_SYSTEM") ==
0) ||
(strcmp(reinterpret_cast<const char*>(m_gci_header.m_filename.data()), "PSO3_SYSTEM") ==
0) ||
(strcmp(reinterpret_cast<const char*>(m_gci_header.m_filename.data()), "f_zero.dat") == 0))
return true;
return false;
}
void DoState(PointerWrap& p);
DEntry m_gci_header;
std::vector<GCMBlock> m_save_data;
std::vector<u16> m_used_blocks;
int UsesBlock(u16 blocknum);
bool m_dirty;
std::string m_filename;
};
class GCMemcard
{
private:
bool m_valid;
std::string m_fileName;
u32 maxBlock;
u16 m_sizeMb;
Header hdr;
Directory dir, dir_backup, *CurrentDir, *PreviousDir;
BlockAlloc bat, bat_backup, *CurrentBat, *PreviousBat;
std::vector<GCMBlock> mc_data_blocks;
u32 ImportGciInternal(File::IOFile&& gci, const std::string& inputFile,
const std::string& outputFile);
void InitDirBatPointers();
public:
explicit GCMemcard(const std::string& fileName, bool forceCreation = false,
bool shift_jis = false);
GCMemcard(const GCMemcard&) = delete;
GCMemcard& operator=(const GCMemcard&) = delete;
GCMemcard(GCMemcard&&) = default;
GCMemcard& operator=(GCMemcard&&) = default;
bool IsValid() const { return m_valid; }
bool IsShiftJIS() const;
bool Save();
bool Format(bool shift_jis = false, u16 SizeMb = MemCard2043Mb);
static bool Format(u8* card_data, bool shift_jis = false, u16 SizeMb = MemCard2043Mb);
static s32 FZEROGX_MakeSaveGameValid(const Header& cardheader, const DEntry& direntry,
std::vector<GCMBlock>& FileBuffer);
static s32 PSO_MakeSaveGameValid(const Header& cardheader, const DEntry& direntry,
std::vector<GCMBlock>& FileBuffer);
u32 TestChecksums() const;
bool FixChecksums();
// get number of file entries in the directory
u8 GetNumFiles() const;
u8 GetFileIndex(u8 fileNumber) const;
// get the free blocks from bat
u16 GetFreeBlocks() const;
// If title already on memcard returns index, otherwise returns -1
u8 TitlePresent(const DEntry& d) const;
bool GCI_FileName(u8 index, std::string& filename) const;
// DEntry functions, all take u8 index < DIRLEN (127)
std::string DEntry_GameCode(u8 index) const;
std::string DEntry_Makercode(u8 index) const;
std::string DEntry_BIFlags(u8 index) const;
std::string DEntry_FileName(u8 index) const;
u32 DEntry_ModTime(u8 index) const;
u32 DEntry_ImageOffset(u8 index) const;
std::string DEntry_IconFmt(u8 index) const;
std::string DEntry_AnimSpeed(u8 index) const;
std::string DEntry_Permissions(u8 index) const;
u8 DEntry_CopyCounter(u8 index) const;
// get first block for file
u16 DEntry_FirstBlock(u8 index) const;
// get file length in blocks
u16 DEntry_BlockCount(u8 index) const;
u32 DEntry_CommentsAddress(u8 index) const;
std::string GetSaveComment1(u8 index) const;
std::string GetSaveComment2(u8 index) const;
// Copies a DEntry from u8 index to DEntry& data
bool GetDEntry(u8 index, DEntry& dest) const;
u32 GetSaveData(u8 index, std::vector<GCMBlock>& saveBlocks) const;
// adds the file to the directory and copies its contents
u32 ImportFile(const DEntry& direntry, std::vector<GCMBlock>& saveBlocks);
// delete a file from the directory
u32 RemoveFile(u8 index);
// reads a save from another memcard, and imports the data into this memcard
u32 CopyFrom(const GCMemcard& source, u8 index);
// reads a .gci/.gcs/.sav file and calls ImportFile or saves out a gci file
u32 ImportGci(const std::string& inputFile, const std::string& outputFile);
// writes a .gci file to disk containing index
u32 ExportGci(u8 index, const std::string& fileName, const std::string& directory) const;
// GCI files are untouched, SAV files are byteswapped
// GCS files have the block count set, default is 1 (For export as GCS)
static void Gcs_SavConvert(DEntry& tempDEntry, int saveType, int length = BLOCK_SIZE);
// reads the banner image
bool ReadBannerRGBA8(u8 index, u32* buffer) const;
// reads the animation frames
u32 ReadAnimRGBA8(u8 index, u32* buffer, u8* delays) const;
};