use BAT for block locations instead of assuming nonfragmented blocks *untested*
Signed-off-by: LPFaint99 <lpfaint99@gmail.com>
This commit is contained in:
LPFaint99
parent
8355363dcd
commit
1fe67e19ab
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@ -543,24 +543,61 @@ bool GCMemcard::GetDEntry(u8 index, DEntry &dest) const
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return true;
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}
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u16 GCMemcard::GetNextBlock(u16 Block) const
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{
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if ((Block < MC_FST_BLOCKS) || (Block > maxBlock))
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return 0;
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return Common::swap16(bat.Map[Block-MC_FST_BLOCKS]);
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}
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u16 GCMemcard::NextFreeBlock(u16 StartingBlock) const
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{
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for (u16 i = StartingBlock; i < BAT_SIZE; ++i)
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if (bat.Map[i-MC_FST_BLOCKS] == 0)
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return i;
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}
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bool GCMemcard::ClearBlocks(u16 FirstBlock, u16 BlockCount)
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{
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std::vector<u16> blocks;
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while (FirstBlock != 0xFF && FirstBlock != 0)
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{
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blocks.push_back(FirstBlock);
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FirstBlock = GetNextBlock(FirstBlock);
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}
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if (FirstBlock > 0)
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{
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size_t length = blocks.size();
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if (length != BlockCount)
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return false;
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for (int i = 0; i < length; ++i)
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bat.Map[blocks.at(i)-MC_FST_BLOCKS] = 0;
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*(u16*)&bat.FreeBlocks = BE16(BE16(bat.FreeBlocks) - BlockCount);
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}
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return true;
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}
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u32 GCMemcard::GetSaveData(u8 index, std::vector<GCMBlock> & Blocks) const
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{
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if (!m_valid)
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return NOMEMCARD;
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u16 block = DEntry_FirstBlock(index);
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u16 saveLength = DEntry_BlockCount(index);
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u16 BlockCount = DEntry_BlockCount(index);
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u16 memcardSize = BE16(hdr.SizeMb) * MBIT_TO_BLOCKS;
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if ((block == 0xFFFF) || (saveLength == 0xFFFF)
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|| (block + saveLength > memcardSize))
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if ((block == 0xFFFF) || (BlockCount == 0xFFFF))
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{
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return FAIL;
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}
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for (int i = 0; i < saveLength; ++i)
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u16 nextBlock = block;
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for (int i = 0; i < BlockCount; ++i)
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{
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Blocks.push_back(mc_data_blocks[i + block-MC_FST_BLOCKS]);
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if ((!nextBlock) || (nextBlock == 0xFFFF))
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return FAIL;
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Blocks.push_back(mc_data_blocks[nextBlock-MC_FST_BLOCKS]);
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nextBlock = GetNextBlock(nextBlock);
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}
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return SUCCESS;
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}
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@ -585,10 +622,12 @@ u32 GCMemcard::ImportFile(DEntry& direntry, std::vector<GCMBlock> &saveBlocks, i
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}
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// find first free data block -- assume no freespace fragmentation
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int totalspace = (((u32)BE16(hdr.SizeMb) * MBIT_TO_BLOCKS) - MC_FST_BLOCKS);
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int firstFree1 = BE16(bat.LastAllocated) + 1;
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int firstFree2 = 0;
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for (int i = 0; i < DIRLEN; i++)
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//int totalspace = (((u32)BE16(hdr.SizeMb) * MBIT_TO_BLOCKS) - MC_FST_BLOCKS);
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//int firstFree1 = BE16(bat.LastAllocated) + 1;
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/* for (int i = 0; i < DIRLEN; i++)
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{
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if (BE32(dir.Dir[i].Gamecode) == 0xFFFFFFFF)
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{
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@ -601,7 +640,8 @@ u32 GCMemcard::ImportFile(DEntry& direntry, std::vector<GCMBlock> &saveBlocks, i
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}
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}
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firstFree1 = max<int>(firstFree1, firstFree2);
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*/
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u16 firstBlock = NextFreeBlock();
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// find first free dir entry
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int index = -1;
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for (int i=0; i < DIRLEN; i++)
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@ -610,7 +650,7 @@ u32 GCMemcard::ImportFile(DEntry& direntry, std::vector<GCMBlock> &saveBlocks, i
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{
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index = i;
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dir.Dir[i] = direntry;
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*(u16*)&dir.Dir[i].FirstBlock = BE16(firstFree1);
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*(u16*)&dir.Dir[i].FirstBlock = BE16(firstBlock);
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if (!remove)
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{
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dir.Dir[i].CopyCounter = dir.Dir[i].CopyCounter+1;
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@ -622,15 +662,22 @@ u32 GCMemcard::ImportFile(DEntry& direntry, std::vector<GCMBlock> &saveBlocks, i
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int fileBlocks = BE16(direntry.BlockCount);
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firstFree1 -= MC_FST_BLOCKS;
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u16 nextBlock;
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// keep assuming no freespace fragmentation, and copy over all the data
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for (int i = 0; i < fileBlocks; ++i)
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{
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mc_data_blocks[i + firstFree1] = saveBlocks[i];
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{
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mc_data_blocks[firstBlock - MC_FST_BLOCKS] = saveBlocks[i];
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if (i == fileBlocks-1)
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nextBlock = 0xFFFF;
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else
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nextBlock = NextFreeBlock(firstBlock+1);
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bat.Map[firstBlock - MC_FST_BLOCKS] = BE16(nextBlock);
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firstBlock = nextBlock;
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}
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bat_backup = bat;
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u16 last = BE16(bat_backup.LastAllocated);
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/* u16 last = BE16(bat_backup.LastAllocated);
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u16 i = (last - 4);
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int j = 2;
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while(j < BE16(direntry.BlockCount) + 1)
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@ -645,11 +692,12 @@ u32 GCMemcard::ImportFile(DEntry& direntry, std::vector<GCMBlock> &saveBlocks, i
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{
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bat_backup.Map[i++] = 0x0000;
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}
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*/
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//update last allocated block
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*(u16*)&bat_backup.LastAllocated = BE16(BE16(bat_backup.LastAllocated) + j - 1);
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/* *(u16*)&bat_backup.LastAllocated = BE16(BE16(bat_backup.LastAllocated) + j - 1);
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*/
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//update freespace counter
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*(u16*)&bat_backup.FreeBlocks = BE16(totalspace - firstFree1 - fileBlocks + MC_FST_BLOCKS);
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*(u16*)&bat_backup.FreeBlocks = BE16(BE16(bat_backup.FreeBlocks) - fileBlocks);
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if (!remove)
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@ -666,7 +714,25 @@ u32 GCMemcard::RemoveFile(u8 index) //index in the directory array
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{
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if (!m_valid)
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return NOMEMCARD;
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if (index >= DIRLEN)
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return DELETE_FAIL;
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dir_backup = dir;
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bat_backup = bat;
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u16 startingblock = BE16(dir.Dir[index].FirstBlock);
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u16 numberofblocks = BE16(dir.Dir[index].BlockCount);
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if (!ClearBlocks(startingblock, numberofblocks))
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return DELETE_FAIL;
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memset(&(dir.Dir[index]), 0xFF, DENTRY_SIZE);
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*(u16*)&dir.UpdateCounter = BE16(BE16(dir.UpdateCounter) + 1);
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*(u16*)&bat.UpdateCounter = BE16(BE16(bat.UpdateCounter) + 1);
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return SUCCESS;
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/*
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//error checking
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u16 startingblock = 0;
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for (int i = 0; i < DIRLEN; i++)
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@ -730,8 +796,7 @@ u32 GCMemcard::RemoveFile(u8 index) //index in the directory array
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}
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// increment update counter
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*(u16*)&dir.UpdateCounter = BE16(BE16(dir.UpdateCounter) + 1);
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return SUCCESS;
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*/
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}
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u32 GCMemcard::CopyFrom(const GCMemcard& source, u8 index)
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@ -55,6 +55,7 @@ enum
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DENTRY_STRLEN = 0x20,
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DENTRY_SIZE = 0x40,
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BLOCK_SIZE = 0x2000,
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BAT_SIZE = 0xFFB,
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MemCard59Mb = 0x04,
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MemCard123Mb = 0x08,
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@ -162,7 +163,7 @@ private:
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u8 UpdateCounter[2];//0x0004 2 update Counter
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u8 FreeBlocks[2]; //0x0006 2 free Blocks
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u8 LastAllocated[2];//0x0008 2 last allocated Block
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u16 Map[0xFFB]; //0x000a 0x1ff8 Map of allocated Blocks
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u16 Map[BAT_SIZE]; //0x000a 0x1ff8 Map of allocated Blocks
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} bat,bat_backup;
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struct GCMC_Header
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{
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@ -218,6 +219,9 @@ public:
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std::string GetSaveComment2(u8 index) const;
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// Copies a DEntry from u8 index to DEntry& data
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bool GetDEntry(u8 index, DEntry &dest) const;
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u16 GetNextBlock(u16 Block) const;
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u16 NextFreeBlock(u16 StartingBlock=MC_FST_BLOCKS) const;
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bool ClearBlocks(u16 StartingBlock, u16 Length);
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// assumes there's enough space in buffer
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// old determines if function uses old or new method of copying data
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