protected override void Open(string filePath)
{
try
{
this.Magic = this.BinaryReader.ReadUInt32();
if (this.Magic == MW_HEADER_MAGIC) // Morrowind uses this as version
{
var header = new BSAHeaderMW(this.BinaryReader, this.Magic);
this.Header = header;
this.FileCount = (int)header.FileCount;
this.Files.Capacity = this.FileCount;
uint dataOffset = BSAHeaderMW.Size + header.HashOffset + header.FileCount * 8; // 8 = filename hash size
// Store file sizes and offsets
for (int i = 0; i < header.FileCount; i++)
{
uint size = this.BinaryReader.ReadUInt32();
uint offset = this.BinaryReader.ReadUInt32() + dataOffset;
this.Files.Add(new BSAFileEntry(this, offset.ToString(), offset, size));
this.Files[i].Index = i;
}
// Check if archive has name offset and name table, for example for Xbox
this.BinaryReader.BaseStream.Position = BSAHeaderMW.Size + header.FileCount * 8; // Skip header and entries, 8 = file entry size
// First name offset should be 0 if there is one, otherwise it doesn't have one
hasNameTableMW = this.BinaryReader.ReadUInt32() == 0;
if (hasNameTableMW)
{
this.BinaryReader.BaseStream.Position = BSAHeaderMW.Size + header.FileCount * 12; // Seek to name table
}
else
{
this.BinaryReader.BaseStream.Position -= 4; // Go Back
}
for (int i = 0; i < header.FileCount; i++)
{
if (hasNameTableMW)
{
this.Files[i].FullPath = this.BinaryReader.ReadStringTo('\0');
}
else
{
this.Files[i].FullPath = string.Format("{0:X}", this.BinaryReader.ReadUInt64());
}
this.Files[i].FullPathOriginal = this.Files[i].FullPath;
}
}
else if (this.Magic == BSA_HEADER_MAGIC)
{
var header = new BSAHeader(this.BinaryReader);
this.Header = header;
this.FileCount = (int)header.FileCount;
this.Files.Capacity = this.FileCount;
int[] numfiles = new int[header.FolderCount];
for (int i = 0; i < header.FolderCount; i++)
{
// Skip hash
this.BinaryReader.BaseStream.Position += 8;
// Read fileCount
numfiles[i] = this.BinaryReader.ReadInt32();
// Skip Unk1 + offset (4 + 8 bytes) if SSE. Otherwise only offset (4 bytes)
this.BinaryReader.BaseStream.Position += header.Version == SSE_HEADER_VERSION ? 12 : 4;
}
for (int i = 0; i < header.FolderCount; i++)
{
string folder = BinaryReader.ReadString(BinaryReader.ReadByte() - 1);
this.BinaryReader.BaseStream.Position++;
for (int j = 0; j < numfiles[i]; j++)
{
// Skip hash
this.BinaryReader.BaseStream.Position += 8;
uint size = this.BinaryReader.ReadUInt32();
uint offset = this.BinaryReader.ReadUInt32();
bool comp = this.Compressed;
if ((size & (1 << 30)) != 0)
{
comp = !comp;
size ^= 1 << 30;
}
this.Files.Add(new BSAFileEntry(this, comp, folder, offset, size));
this.Files[j].Index = j;
}
}
// Grab the uncompressed file size before each data block
if (this.RetrieveRealSize)
{
// Save the position so we can go back after to the name table
long pos = this.BinaryReader.BaseStream.Position;
for (int i = 0; i < header.FileCount; i++)
{
var entry = this.Files[i] as BSAFileEntry;
if (!entry.Compressed)
{
continue;
}
this.BinaryReader.BaseStream.Position = (long)entry.Offset;
if (this.ContainsFileNameBlobs)
{
this.BinaryReader.BaseStream.Position += this.BinaryReader.ReadByte() + 1;
}
entry.RealSize = this.BinaryReader.ReadUInt32();
}
this.BinaryReader.BaseStream.Position = pos;
}
// Read name table
for (int i = 0; i < header.FileCount; i++)
{
this.Files[i].FullPath = Path.Combine(
this.Files[i].FullPath,
this.BinaryReader.ReadStringTo('\0'));
this.Files[i].FullPathOriginal = this.Files[i].FullPath;
}
}
else
{
// Assume it's a Fallout 2 DAT
this.BinaryReader.BaseStream.Position = this.BinaryReader.BaseStream.Length - 8;
uint treeSize = this.BinaryReader.ReadUInt32();
uint dataSize = this.BinaryReader.ReadUInt32();
if (dataSize != this.BinaryReader.BaseStream.Length)
{
this.BinaryReader.Close();
throw new ArgumentException("File is not a valid bsa archive.", nameof(filePath));
}
this.BinaryReader.BaseStream.Position = dataSize - treeSize - 8;
this.FileCount = this.BinaryReader.ReadInt32();
this.Files.Capacity = this.FileCount;
for (int i = 0; i < this.FileCount; i++)
{
var entry = new DAT2FileEntry(this.BinaryReader);
this.Files.Add(new BSAFileEntry(this, entry));
this.Files[i].Index = i;
}
}
}
catch (Exception)
{
this.BinaryReader?.Close();
throw;
}
}
protected override void Open(string filePath)
{
try
{
this.Magic = this.BinaryReader.ReadUInt32();
if (this.Magic == MW_HEADER_MAGIC) // Morrowind uses this as version
{
var header = new BSAHeaderMW(this.BinaryReader, this.Magic);
this.Header = header;
this.FileCount = (int)header.FileCount;
uint dataOffset = 12 + header.HashOffset + header.FileCount * 8;
for (int i = 0; i < header.FileCount; i++)
{
uint size = this.BinaryReader.ReadUInt32();
uint offset = this.BinaryReader.ReadUInt32() + dataOffset;
this.Files.Add(new BSAFileEntry(this, offset.ToString(), offset, size));
}
// Seek to name table
this.BinaryReader.BaseStream.Position = 12 + header.FileCount * 12;
for (int i = 0; i < header.FileCount; i++)
{
this.Files[i].FullPath = this.BinaryReader.ReadStringTo('\0');
}
}
else if (this.Magic == BSA_HEADER_MAGIC)
{
var header = new BSAHeader(this.BinaryReader);
this.Header = header;
this.FileCount = (int)header.FileCount;
int[] numfiles = new int[header.FolderCount];
for (int i = 0; i < header.FolderCount; i++)
{
// Skip hash
this.BinaryReader.BaseStream.Position += 8;
// Read fileCount
numfiles[i] = this.BinaryReader.ReadInt32();
// Skip Unk1 + offset (4 + 8 bytes) if SSE. Otherwise only offset (4 bytes)
this.BinaryReader.BaseStream.Position += header.Version == SSE_HEADER_VERSION ? 12 : 4;
}
for (int i = 0; i < header.FolderCount; i++)
{
string folder = BinaryReader.ReadString(BinaryReader.ReadByte() - 1);
this.BinaryReader.BaseStream.Position++;
for (int j = 0; j < numfiles[i]; j++)
{
// Skip hash
this.BinaryReader.BaseStream.Position += 8;
uint size = this.BinaryReader.ReadUInt32();
uint offset = this.BinaryReader.ReadUInt32();
bool comp = this.Compressed;
if ((size & (1 << 30)) != 0)
{
comp = !comp;
size ^= 1 << 30;
}
this.Files.Add(new BSAFileEntry(this, comp, folder, offset, size));
}
}
// Read name table
for (int i = 0; i < header.FileCount; i++)
{
this.Files[i].FullPath = Path.Combine(
this.Files[i].FullPath,
this.BinaryReader.ReadStringTo('\0'));
}
}
else
{
// Assume it's a Fallout 2 DAT
this.BinaryReader.BaseStream.Position = this.BinaryReader.BaseStream.Length - 8;
uint treeSize = this.BinaryReader.ReadUInt32();
uint dataSize = this.BinaryReader.ReadUInt32();
if (dataSize != this.BinaryReader.BaseStream.Length)
{
this.BinaryReader.Close();
throw new ArgumentException("File is not a valid bsa archive.", nameof(filePath));
}
this.BinaryReader.BaseStream.Position = dataSize - treeSize - 8;
this.FileCount = this.BinaryReader.ReadInt32();
for (int i = 0; i < this.FileCount; i++)
{
var entry = new DAT2FileEntry(this.BinaryReader);
this.Files.Add(new BSAFileEntry(this, entry));
}
}
}
catch (Exception ex)
{
this.BinaryReader?.Close();
throw new Exception("An error occured trying to open the archive.", ex);
}
}