/// <summary>
/// Reads BND4 data from a BinaryReaderEx.
/// </summary>
internal override void Read(BinaryReaderEx br)
{
br.BigEndian = false;
br.AssertASCII("BND4");
Flag1 = br.ReadBoolean();
Flag2 = br.ReadBoolean();
br.AssertByte(0);
br.AssertByte(0);
BigEndian = br.AssertInt32(0x00010000, 0x00000100) == 0x00000100;
br.BigEndian = BigEndian;
int fileCount = br.ReadInt32();
// Header size
br.AssertInt64(0x40);
Timestamp = br.ReadFixStr(8);
// File header size
long fileHeaderSize = br.ReadInt64();
long dataStart = br.ReadInt64();
Unicode = br.ReadBoolean();
Format = br.ReadEnum8 <Binder.Format>();
Extended = br.AssertByte(0, 1, 4, 0x80);
br.AssertByte(0);
if (fileHeaderSize != Binder.FileHeaderSize(Format))
{
throw new FormatException($"File header size 0x{fileHeaderSize} unexpected for format {Format}");
}
br.AssertInt32(0);
long hashGroupsOffset = 0;
if (Extended == 4)
{
hashGroupsOffset = br.ReadInt64();
}
else
{
br.AssertInt64(0);
}
Files = new List <BinderFile>(fileCount);
for (int i = 0; i < fileCount; i++)
{
Files.Add(ReadFile(br, Unicode, Format));
}
}
/// <summary>
/// Writes BND4 data to a BinaryWriterEx.
/// </summary>
internal override void Write(BinaryWriterEx bw)
{
bw.BigEndian = BigEndian;
bw.WriteASCII("BND4");
bw.WriteBoolean(Flag1);
bw.WriteBoolean(Flag2);
bw.WriteByte(0);
bw.WriteByte(0);
bw.WriteInt32(0x10000);
bw.WriteInt32(Files.Count);
bw.WriteInt64(0x40);
bw.WriteFixStr(Timestamp, 8);
bw.WriteInt64(Binder.FileHeaderSize(Format));
bw.ReserveInt64("DataStart");
bw.WriteBoolean(Unicode);
bw.WriteByte((byte)Format);
bw.WriteByte(Extended);
bw.WriteByte(0);
bw.WriteInt32(0);
if (Extended == 4)
{
bw.ReserveInt64("HashGroups");
}
else
{
bw.WriteInt64(0);
}
for (int i = 0; i < Files.Count; i++)
{
WriteFile(Files[i], bw, i, Format);
}
if (Binder.HasName(Format))
{
for (int i = 0; i < Files.Count; i++)
{
BinderFile file = Files[i];
bw.FillUInt32($"FileName{i}", (uint)bw.Position);
if (Unicode)
{
bw.WriteUTF16(file.Name, true);
}
else
{
bw.WriteShiftJIS(file.Name, true);
}
}
}
if (Extended == 4)
{
uint groupCount = 0;
for (uint p = (uint)Files.Count / 7; p <= 100000; p++)
{
if (SFUtil.IsPrime(p))
{
groupCount = p;
break;
}
}
if (groupCount == 0)
{
throw new InvalidOperationException("Hash group count not determined in BND4.");
}
var hashLists = new List <PathHash> [groupCount];
for (int i = 0; i < groupCount; i++)
{
hashLists[i] = new List <PathHash>();
}
for (int i = 0; i < Files.Count; i++)
{
var pathHash = new PathHash(i, Files[i].Name);
uint group = pathHash.Hash % groupCount;
hashLists[group].Add(pathHash);
}
for (int i = 0; i < groupCount; i++)
{
hashLists[i].Sort((ph1, ph2) => ph1.Hash.CompareTo(ph2.Hash));
}
var hashGroups = new List <HashGroup>();
var pathHashes = new List <PathHash>();
int count = 0;
foreach (List <PathHash> hashList in hashLists)
{
int index = count;
foreach (PathHash pathHash in hashList)
{
pathHashes.Add(pathHash);
count++;
}
hashGroups.Add(new HashGroup(index, count - index));
}
bw.Pad(0x8);
bw.FillInt64("HashGroups", bw.Position);
bw.ReserveInt64("PathHashes");
bw.WriteUInt32(groupCount);
bw.WriteInt32(0x00080810);
foreach (HashGroup hashGroup in hashGroups)
{
hashGroup.Write(bw);
}
// No padding after section 1
bw.FillInt64("PathHashes", bw.Position);
foreach (PathHash pathHash in pathHashes)
{
pathHash.Write(bw);
}
}
bw.FillInt64("DataStart", bw.Position);
for (int i = 0; i < Files.Count; i++)
{
BinderFile file = Files[i];
if (file.Bytes.LongLength > 0)
{
bw.Pad(0x10);
}
bw.FillUInt32($"FileData{i}", (uint)bw.Position);
int compressedSize = file.Bytes.Length;
if (Binder.IsCompressed(file.Flags))
{
if (Format == Binder.Format.x2E)
{
byte[] bytes = DCX.Compress(file.Bytes, DCX.Type.DemonsSoulsEDGE);
bw.WriteBytes(bytes);
compressedSize = bytes.Length;
}
else
{
compressedSize = SFUtil.WriteZlib(bw, 0x9C, file.Bytes);
}
}
else
{
bw.WriteBytes(file.Bytes);
}
bw.FillInt64($"CompressedSize{i}", compressedSize);
}
}
