private bool TryGetHashEntry(string filename, out MpqHash hash)
{
uint index = HashString(filename, 0);
index &= _mpqHeader.HashTableSize - 1;
uint name1 = HashString(filename, 0x100);
uint name2 = HashString(filename, 0x200);
for (uint i = index; i < _hashes.Length; ++i)
{
hash = _hashes[i];
if (hash.Name1 == name1 && hash.Name2 == name2)
{
return(true);
}
}
for (uint i = 0; i < index; i++)
{
hash = _hashes[i];
if (hash.Name1 == name1 && hash.Name2 == name2)
{
return(true);
}
}
hash = new MpqHash();
return(false);
}
private MpqHash GetHashEntry(string Filename)
{
uint index = HashString(Filename, 0);
index &= mHeader.HashTableSize - 1;
uint name1 = HashString(Filename, 0x100);
uint name2 = HashString(Filename, 0x200);
uint i = index;
do
{
MpqHash hash = mHashes[i];
if (hash.Name1 == name1 && hash.Name2 == name2)
{
return(hash);
}
if (++i >= mHashes.Length)
{
i = 0;
}
} while (i != index);
return(MpqHash.InvalidHash());
}
public static MpqHash InvalidHash()
{
MpqHash invalid = new MpqHash();
invalid.Name1 = uint.MaxValue;
invalid.Name2 = uint.MaxValue;
return(invalid);
}
private void Init()
{
if (LocateMpqHeader() == false)
{
throw new MpqParserException("Unable to find MPQ header");
}
if (_mpqHeader.HashTableOffsetHigh != 0 || _mpqHeader.ExtendedBlockTableOffset != 0 || _mpqHeader.BlockTableOffsetHigh != 0)
{
throw new MpqParserException("MPQ format version 1 features are not supported");
}
BinaryReader br = new BinaryReader(BaseStream);
BlockSize = 0x200 << _mpqHeader.BlockSize;
// Load hash table
BaseStream.Seek(_mpqHeader.HashTablePos, SeekOrigin.Begin);
byte[] hashdata = br.ReadBytes((int)(_mpqHeader.HashTableSize * MpqHash.Size));
DecryptTable(hashdata, "(hash table)");
BinaryReader br2 = new BinaryReader(new MemoryStream(hashdata));
_hashes = new MpqHash[_mpqHeader.HashTableSize];
for (int i = 0; i < _mpqHeader.HashTableSize; i++)
{
_hashes[i] = new MpqHash(br2);
}
// Load entry table
BaseStream.Seek(_mpqHeader.BlockTablePos, SeekOrigin.Begin);
byte[] entrydata = br.ReadBytes((int)(_mpqHeader.BlockTableSize * MpqEntry.Size));
DecryptTable(entrydata, "(block table)");
br2 = new BinaryReader(new MemoryStream(entrydata));
_entries = new MpqEntry[_mpqHeader.BlockTableSize];
for (int i = 0; i < _mpqHeader.BlockTableSize; i++)
{
_entries[i] = new MpqEntry(br2, (uint)_headerOffset);
}
}
private void Init()
{
if (LocateMpqHeader() == false)
{
throw new MpqParserException("Unable to find MPQ header");
}
BinaryReader br = new BinaryReader(mStream);
mBlockSize = 0x200 << mHeader.BlockSize;
// Load hash table
mStream.Seek(mHeader.HashTablePos, SeekOrigin.Begin);
byte[] hashdata = br.ReadBytes((int)(mHeader.HashTableSize * MpqHash.Size));
DecryptTable(hashdata, "(hash table)");
BinaryReader br2 = new BinaryReader(new MemoryStream(hashdata));
mHashes = new MpqHash[mHeader.HashTableSize];
for (int i = 0; i < mHeader.HashTableSize; i++)
{
mHashes[i] = new MpqHash(br2);
}
// Load block table
mStream.Seek(mHeader.BlockTablePos, SeekOrigin.Begin);
byte[] blockdata = br.ReadBytes((int)(mHeader.BlockTableSize * MpqBlock.Size));
int blockcount = (int)(blockdata.Length / MpqBlock.Size); // This is not always mHeader.BlockTableSize
DecryptTable(blockdata, "(block table)");
br2 = new BinaryReader(new MemoryStream(blockdata));
mBlocks = new MpqBlock[mHeader.BlockTableSize];
for (int i = 0; i < blockcount; i++)
{
mBlocks[i] = new MpqBlock(br2, (uint)mHeaderOffset);
}
}
public bool FileExists(string Filename)
{
MpqHash hash = GetHashEntry(Filename);
return(hash.IsValid);
}