protected override FileIndexEntry[] ReadEntries()
{
var entries = new List <FileIndexEntry>();
var length = (int)(_fileInfo.Length / 3 / 4);
using var index = new FileStream(_indexPath, FileMode.Open, FileAccess.Read, FileShare.Read);
var binaryReader = new BinaryReader(index);
var count = (int)(index.Length / 12);
for (var i = 0; i < count && i < length; ++i)
{
var entry = new FileIndexEntry
{
Lookup = binaryReader.ReadInt32(),
Length = binaryReader.ReadInt32(),
Extra = binaryReader.ReadInt32()
};
entries.Add(entry);
}
for (var i = count; i < length; ++i)
{
var entry = new FileIndexEntry
{
Lookup = -1,
Length = -1,
Extra = -1
};
entries.Add(entry);
}
return(entries.ToArray());
}
protected override FileIndexEntry[] ReadEntries()
{
var length = Length;
var dataPath = DataPath;
var entries = new FileIndexEntry[length];
for (var i = 0; i < entries.Length; i++)
{
entries[i].Lookup = -1;
}
using var index = new FileStream(dataPath, FileMode.Open, FileAccess.Read, FileShare.Read);
var fileInfo = new FileInfo(dataPath);
var uopPattern = Path.GetFileNameWithoutExtension(fileInfo.Name).ToLowerInvariant();
using var binaryReader = new BinaryReader(index);
binaryReader.BaseStream.Seek(0, SeekOrigin.Begin);
if (binaryReader.ReadInt32() != UOP_MAGIC_NUMBER)
{
throw new ArgumentException("Bad UOP file.");
}
binaryReader.ReadInt64(); // version + signature
var nextBlock = binaryReader.ReadInt64();
binaryReader.ReadInt32(); // block capacity
var count = binaryReader.ReadInt32();
var hashes = new Dictionary <ulong, int>();
for (var i = 0; i < length; i++)
{
var entryName = $"build/{uopPattern}/{i:D8}{_extension}";
var hash = CreateHash(entryName);
if (!hashes.ContainsKey(hash))
{
hashes.Add(hash, i);
}
}
binaryReader.BaseStream.Seek(nextBlock, SeekOrigin.Begin);
do
{
var filesCount = binaryReader.ReadInt32();
nextBlock = binaryReader.ReadInt64();
for (var i = 0; i < filesCount; i++)
{
var offset = binaryReader.ReadInt64();
var headerLength = binaryReader.ReadInt32();
var compressedLength = binaryReader.ReadInt32();
var decompressedLength = binaryReader.ReadInt32();
var hash = binaryReader.ReadUInt64();
binaryReader.ReadUInt32(); // Adler32
var flag = binaryReader.ReadInt16();
var entryLength = flag == 1 ? compressedLength : decompressedLength;
if (offset == 0)
{
continue;
}
if (hashes.TryGetValue(hash, out var idx))
{
if (idx < 0 || idx > entries.Length)
{
throw new IndexOutOfRangeException("hashes dictionary and files collection have different count of entries!");
}
entries[idx].Lookup = (int)(offset + headerLength);
entries[idx].Length = entryLength;
if (_hasExtra)
{
var cursorPosition = binaryReader.BaseStream.Position;
binaryReader.BaseStream.Seek(offset + headerLength, SeekOrigin.Begin);
var extra = binaryReader.ReadBytes(8);
var extra1 = (ushort)((extra[3] << 24) | (extra[2] << 16) | (extra[1] << 8) | extra[0]);
var extra2 = (ushort)((extra[7] << 24) | (extra[6] << 16) | (extra[5] << 8) | extra[4]);
entries[idx].Lookup += 8;
entries[idx].Extra = extra1 << 16 | extra2;
binaryReader.BaseStream.Seek(cursorPosition, SeekOrigin.Begin);
}
}
}
}while (binaryReader.BaseStream.Seek(nextBlock, SeekOrigin.Begin) != 0);
return(entries);
}
