public GT3DemoVol(string file)
{
volFile = new FileStream(file, FileMode.Open, FileAccess.Read);
byte[] intArray = new byte[4];
volFile.Seek(8, SeekOrigin.Begin);
volFile.Read(intArray, 0, 4);
uint headerSize = BitConverter.ToUInt32(intArray, 0);
volFile.Seek(0, SeekOrigin.Begin);
byte[] header = new byte[headerSize];
volFile.Read(header, 0, (int)headerSize);
Debug.Assert((header[0] == 'R') && (header[1] == 'o') && (header[2] == 'F') && (header[3] == 'S'));
MemoryStream ms = new MemoryStream(header, false);
ms.Seek(0xc, SeekOrigin.Begin);
BinaryReader br = new BinaryReader(ms, Encoding.UTF8);
uint rootEntryData = br.ReadUInt32();
if ((rootEntryData & Flags.Directory) != Flags.Directory)
{
Console.Error.WriteLine("{0} is an invalid VOL", file);
volFile.Close();
return;
}
uint nameOffset = (rootEntryData & Flags.TurnOffFlags);
rootVolEntry = new VolEntryInfo();
rootVolEntry.size = 0;
rootVolEntry.fileAddress = 0xc;
rootVolEntry.name = ReadNullTermName(br, nameOffset);
rootVolEntry.children = ParseDirectory(br);
}
public GT3Vol(string file)
{
volFile = new FileStream(file, FileMode.Open, FileAccess.Read);
byte[] magic = new byte[4];
volFile.Read(magic, 0, magic.Length);
// if this is a demo vol
if ((magic[0] == 'R') && (magic[1] == 'o') && (magic[2] == 'F') && (magic[3] == 'S'))
{
isDemoVol = true;
compressedFlag = 0x2;
directoryFlag = 0x1;
}
// this is 'RoFS' but bitwise not-ted
else if ((magic[0] == 0xAD) && (magic[1] == 0x90) && (magic[2] == 0xB9) && (magic[3] == 0xAC))
{
isDemoVol = false;
compressedFlag = 0x02000000;
directoryFlag = 0x01000000;
}
else
{
volFile.Close();
throw new FileLoadException("This isn't a GT3 VOL");
}
allFlags = compressedFlag | directoryFlag;
turnOffFlags = ~allFlags;
byte[] intArray = new byte[4];
volFile.Seek(8, SeekOrigin.Begin);
volFile.Read(intArray, 0, 4);
uint headerSize = BitConverter.ToUInt32(intArray, 0);
volFile.Seek(0, SeekOrigin.Begin);
byte[] header = new byte[headerSize];
volFile.Read(header, 0, (int)headerSize);
MemoryStream ms = new MemoryStream(header, false);
BinaryReader br = new BinaryReader(ms);
br.BaseStream.Seek(0xc, SeekOrigin.Begin);
if (!isDemoVol)
{
//volFile.Read(intArray, 0, 4);
//uint namesOffset = BitConverter.ToUInt32(intArray, 0) + 1;
uint namesOffset = br.ReadUInt32();
uint namesSize = headerSize - namesOffset;
for (uint i = namesOffset; i < headerSize; ++i)
{
header[i] = (byte)~header[i];
}
br.BaseStream.Seek(0x14, SeekOrigin.Begin);
}
uint rootEntryData = br.ReadUInt32();
if ((rootEntryData & directoryFlag) != directoryFlag)
{
Console.Error.WriteLine("{0} is an invalid VOL", file);
volFile.Close();
throw new FileLoadException("Don't recognize this type of GT3.VOL");
}
uint nameOffset = rootEntryData & turnOffFlags;
rootVolEntry = new VolEntryInfo();
rootVolEntry.size = 0;
rootVolEntry.fileAddress = isDemoVol ? 0xcu : 0x14u;
rootVolEntry.name = ReadNullTermName(br, nameOffset);
rootVolEntry.children = ParseDirectory(br);
}
private List <VolEntryInfo> ParseDirectory(BinaryReader br)
{
int numEntries = br.ReadInt32();
List <VolEntryInfo> entryInfo = new List <VolEntryInfo>(numEntries);
long currentFileOffset = br.BaseStream.Position;
for (int i = 0; i < numEntries; ++i)
{
uint entryOffset = (uint)br.BaseStream.Position;
uint entry = br.ReadUInt32();
uint entryFlag = entry & allFlags;
uint entryPointer = entry & turnOffFlags;
// directory entries are offsets to data about the entries
// the flags for directories etc are in this data, not the entries themselves
Debug.Assert(entryFlag == 0);
// parent entry
if (entryPointer < currentFileOffset)
{
continue;
}
uint offsetValue = GetValueAtOffset(br, entryPointer);
uint offsetFlag = offsetValue & allFlags;
uint offsetPosition = offsetValue & turnOffFlags;
string entryName = ReadNullTermName(br, offsetPosition);
VolEntryInfo volEntry = new VolEntryInfo();
volEntry.children = null;
volEntry.name = entryName;
volEntry.isCompressed = false;
volEntry.entryAddress = entryOffset;
volEntry.fileInfoAddress = entryPointer;
if (offsetFlag == directoryFlag)
{
volEntry.size = 0;
long preParsePos = br.BaseStream.Position;
br.BaseStream.Seek(entryPointer + 4, SeekOrigin.Begin);
volEntry.children = ParseDirectory(br);
br.BaseStream.Seek(preParsePos, SeekOrigin.Begin);
}
else if (offsetFlag == compressedFlag) // compressed file (gzip)
{
// high byte 2 = gzip compressed file (lower 3 bytes, name offset)
// first entry = file data offset
// second entry = decompressed size
// third entry = compressed size (ie the size of the data in the vol)
volEntry.isCompressed = true;
long preParsePos = br.BaseStream.Position;
br.BaseStream.Seek(entryPointer + 4, SeekOrigin.Begin);
uint dataOffset = br.ReadUInt32() * 0x800;
volEntry.fileAddress = dataOffset;
br.ReadUInt32(); // decompressed size, not needed
volEntry.size = br.ReadUInt32();
br.BaseStream.Seek(preParsePos, SeekOrigin.Begin);
}
else // entry
{
Debug.Assert(offsetFlag == 0);
long preParsePos = br.BaseStream.Position;
br.BaseStream.Seek(entryPointer + 4, SeekOrigin.Begin);
uint dataOffset = br.ReadUInt32() * 0x800;
volEntry.fileAddress = dataOffset;
volEntry.size = br.ReadUInt32();
if (isDemoVol)
{
// the demo has 4 entries for both compressed and normal files
br.ReadUInt32();
}
br.BaseStream.Seek(preParsePos, SeekOrigin.Begin);
}
entryInfo.Add(volEntry);
}
return(entryInfo);
}
private List <VolEntryInfo> ParseDirectory(BinaryReader br)
{
int numEntries = br.ReadInt32();
List <VolEntryInfo> entryInfo = new List <VolEntryInfo>(numEntries);
long currentFileOffset = br.BaseStream.Position;
for (int i = 0; i < numEntries; ++i)
{
uint entryOffset = (uint)br.BaseStream.Position;
uint entry = br.ReadUInt32();
uint entryFlag = (entry & Flags.AllFlags);
uint entryPointer = entry & ~Flags.TurnOffFlags;
// directory entries are offsets to data about the entries
// the flags for directories etc are in this data, not the entries themselves
Debug.Assert(entryFlag == 0);
// parent entry
if (entryPointer < currentFileOffset)
{
continue;
}
uint offsetValue = GetValueAtOffset(br, entryPointer);
uint offsetFlag = offsetValue & Flags.AllFlags;
uint offsetPosition = offsetValue & Flags.TurnOffFlags;
string entryName = ReadNullTermName(br, offsetPosition);
VolEntryInfo volEntry = new VolEntryInfo();
volEntry.children = null;
volEntry.name = entryName;
volEntry.isCompressed = false;
volEntry.entryAddress = entryOffset;
volEntry.fileInfoAddress = entryPointer;
switch (offsetFlag)
{
case 1: // directory
{
volEntry.size = 0;
long preParsePos = br.BaseStream.Position;
br.BaseStream.Seek(entryPointer + 4, SeekOrigin.Begin);
volEntry.children = ParseDirectory(br);
br.BaseStream.Seek(preParsePos, SeekOrigin.Begin);
}
break;
case 2: // compressed file (gzip)
case 0: // uncompressed file
{
// files -
// first entry = file data offset
// second entry = decompressed size
// third entry = compressed size (ie the size of the data in the vol)
volEntry.isCompressed = (offsetFlag == 2);
long preParsePos = br.BaseStream.Position;
br.BaseStream.Seek(entryPointer + 4, SeekOrigin.Begin);
uint dataOffset = br.ReadUInt32() * 0x800;
volEntry.fileAddress = dataOffset;
br.ReadUInt32(); // decompressed size, not needed
volEntry.size = br.ReadUInt32();
br.BaseStream.Seek(preParsePos, SeekOrigin.Begin);
}
break;
default:
{
Debug.Assert(false);
}
break;
}
entryInfo.Add(volEntry);
}
return(entryInfo);
}
