// Read the table of contents of the ARC file
private void ReadARCToC()
{
// Format of an ARC file
// 0x08 - 4 bytes = # of files
// 0x0C - 4 bytes = # of parts
// 0x18 - 4 bytes = offset to directory structure
//
// Format of directory structure
// 4-byte int = offset in file where this part begins
// 4-byte int = size of compressed part
// 4-byte int = size of uncompressed part
// these triplets repeat for each part in the arc file
// After these triplets are a bunch of null-terminated strings
// which are the sub filenames.
// After the subfilenames comes the subfile data:
// 4-byte int = 3 == indicates start of subfile item (maybe compressed flag??)
// 1 == maybe uncompressed flag??
// 4-byte int = offset in file where first part of this subfile begins
// 4-byte int = compressed size of this file
// 4-byte int = uncompressed size of this file
// 4-byte crap
// 4-byte crap
// 4-byte crap
// 4-byte int = numParts this file uses
// 4-byte int = part# of first part for this file (starting at 0).
// 4-byte int = length of filename string
// 4-byte int = offset in directory structure for filename
m_fileHasBeenRead = true;
try {
FileStream arcFile = new FileStream(m_filename, FileMode.Open, FileAccess.Read);
BinaryReader reader = new BinaryReader(arcFile);
try
{
// check the file header
if (reader.ReadByte() != 0x41)
{
return; // A
}
if (reader.ReadByte() != 0x52)
{
return; // R
}
if (reader.ReadByte() != 0x43)
{
return; // C
}
if (arcFile.Length < 0x21)
{
return;
}
reader.BaseStream.Seek(0x08, SeekOrigin.Begin);
int numEntries = reader.ReadInt32();
int numParts = reader.ReadInt32();
ARCPartEntry[] parts = new ARCPartEntry[numParts];
ARCDirEntry[] records = new ARCDirEntry[numEntries];
reader.BaseStream.Seek(0x18, SeekOrigin.Begin);
int tocOffset = reader.ReadInt32();
if (arcFile.Length < (tocOffset + 4 * 3))
{
return;
}
// Read in all of the part data
reader.BaseStream.Seek(tocOffset, SeekOrigin.Begin);
int i;
for (i = 0; i < numParts; ++i)
{
parts[i] = new ARCPartEntry();
parts[i].fileOffset = reader.ReadInt32();
parts[i].compressedSize = reader.ReadInt32();
parts[i].realSize = reader.ReadInt32();
}
// Now record this offset so we can come back and read in the filenames after we have
// read in the file records
int fileNamesOffset = (int)arcFile.Position;
// Now seek to the location where the file record data is
// This offset is from the end of the file.
int fileRecordOffset = 44 * numEntries;
arcFile.Seek(-1 * fileRecordOffset, SeekOrigin.End);
for (i = 0; i < numEntries; ++i)
{
records[i] = new ARCDirEntry();
int storageType = reader.ReadInt32(); // storageType = 3 - compressed / 1- non compressed
// Added by VillageIdiot to support stored types
records[i].storageType = storageType;
records[i].fileOffset = reader.ReadInt32();
records[i].compressedSize = reader.ReadInt32();
records[i].realSize = reader.ReadInt32();
int crap = reader.ReadInt32(); // crap
crap = reader.ReadInt32(); // crap
crap = reader.ReadInt32(); // crap
int np = reader.ReadInt32();
if (np < 1)
{
records[i].parts = null;
}
else
{
records[i].parts = new ARCPartEntry[np];
}
int firstPart = reader.ReadInt32();
crap = reader.ReadInt32(); // filename length
crap = reader.ReadInt32(); // filename offset
if (storageType != 1 && records[i].IsActive)
{
for (int ip = 0; ip < records[i].parts.Length; ++ip)
{
records[i].parts[ip] = parts[ip + firstPart];
}
}
}
// Now read in the record names
arcFile.Seek(fileNamesOffset, SeekOrigin.Begin);
byte[] buffer = new byte[2048];
ASCIIEncoding ascii = new ASCIIEncoding();
for (i = 0; i < numEntries; ++i)
{
// only Active files have a filename entry
if (records[i].IsActive)
{
// For each string, read bytes until I hit a 0x00 byte.
int bufSize = 0;
while ((buffer[bufSize++] = reader.ReadByte()) != 0x00)
{
if (buffer[bufSize - 1] == 0x03)
{ // god damn it
arcFile.Seek(-1, SeekOrigin.Current); // backup
bufSize--;
buffer[bufSize] = 0x00;
break;
}
}
string newfile;
if (bufSize >= 1)
{
// Now convert the buffer to a String
char[] chars = new char[ascii.GetCharCount(buffer, 0, bufSize - 1)];
ascii.GetChars(buffer, 0, bufSize - 1, chars, 0);
newfile = new string(chars);
}
else
{
newfile = string.Format("Null File {0}", i);
}
records[i].filename = NormalizeRecordPath(newfile);
}
}
// Now convert the array of records into a hash table.
Hashtable hash = new Hashtable(numEntries);
for (i = 0; i < numEntries; ++i)
{
if (records[i].IsActive)
{
hash.Add(records[i].filename, records[i]);
}
}
m_dir = hash;
BuildKeyTable();
}
finally
{
reader.Close();
}
}
catch (IOException)
{
// silently eat these errors
}
}
/// <summary>
/// Read the table of contents of the ARC file
/// </summary>
private void ReadARCToC()
{
// Format of an ARC file
// 0x08 - 4 bytes = # of files
// 0x0C - 4 bytes = # of parts
// 0x18 - 4 bytes = offset to directory structure
//
// Format of directory structure
// 4-byte int = offset in file where this part begins
// 4-byte int = size of compressed part
// 4-byte int = size of uncompressed part
// these triplets repeat for each part in the arc file
// After these triplets are a bunch of null-terminated strings
// which are the sub filenames.
// After the subfilenames comes the subfile data:
// 4-byte int = 3 == indicates start of subfile item (maybe compressed flag??)
// 1 == maybe uncompressed flag??
// 4-byte int = offset in file where first part of this subfile begins
// 4-byte int = compressed size of this file
// 4-byte int = uncompressed size of this file
// 4-byte crap
// 4-byte crap
// 4-byte crap
// 4-byte int = numParts this file uses
// 4-byte int = part# of first part for this file (starting at 0).
// 4-byte int = length of filename string
// 4-byte int = offset in directory structure for filename
this.fileHasBeenRead = true;
if (TQDebug.ArcFileDebugLevel > 0)
{
TQDebug.DebugWriteLine(string.Format(CultureInfo.InvariantCulture, "ARCFile.ReadARCToC({0})", this.FileName));
}
try
{
using (FileStream arcFile = new FileStream(this.FileName, FileMode.Open, FileAccess.Read))
{
using (BinaryReader reader = new BinaryReader(arcFile))
{
if (TQDebug.ArcFileDebugLevel > 1)
{
TQDebug.DebugWriteLine(string.Format(CultureInfo.InvariantCulture, "File Length={0}", arcFile.Length));
}
// check the file header
if (reader.ReadByte() != 0x41)
{
return;
}
if (reader.ReadByte() != 0x52)
{
return;
}
if (reader.ReadByte() != 0x43)
{
return;
}
if (arcFile.Length < 0x21)
{
return;
}
reader.BaseStream.Seek(0x08, SeekOrigin.Begin);
int numEntries = reader.ReadInt32();
int numParts = reader.ReadInt32();
if (TQDebug.ArcFileDebugLevel > 1)
{
TQDebug.DebugWriteLine(string.Format(CultureInfo.InvariantCulture, "numEntries={0}, numParts={1}", numEntries, numParts));
}
ARCPartEntry[] parts = new ARCPartEntry[numParts];
ARCDirEntry[] records = new ARCDirEntry[numEntries];
if (TQDebug.ArcFileDebugLevel > 2)
{
TQDebug.DebugWriteLine("Seeking to tocOffset location");
}
reader.BaseStream.Seek(0x18, SeekOrigin.Begin);
int tocOffset = reader.ReadInt32();
if (TQDebug.ArcFileDebugLevel > 1)
{
TQDebug.DebugWriteLine(string.Format(CultureInfo.InvariantCulture, "tocOffset = {0}", tocOffset));
}
// Make sure all 3 entries exist for the toc entry.
if (arcFile.Length < (tocOffset + 12))
{
return;
}
// Read in all of the part data
reader.BaseStream.Seek(tocOffset, SeekOrigin.Begin);
int i;
for (i = 0; i < numParts; ++i)
{
parts[i] = new ARCPartEntry();
parts[i].FileOffset = reader.ReadInt32();
parts[i].CompressedSize = reader.ReadInt32();
parts[i].RealSize = reader.ReadInt32();
if (TQDebug.ArcFileDebugLevel > 2)
{
TQDebug.DebugWriteLine(string.Format(CultureInfo.InvariantCulture, "parts[{0}]", i));
TQDebug.DebugWriteLine(string.Format(
CultureInfo.InvariantCulture,
" fileOffset={0}, compressedSize={1}, realSize={2}",
parts[i].FileOffset,
parts[i].CompressedSize,
parts[i].RealSize));
}
}
// Now record this offset so we can come back and read in the filenames
// after we have read in the file records
int fileNamesOffset = (int)arcFile.Position;
// Now seek to the location where the file record data is
// This offset is from the end of the file.
int fileRecordOffset = 44 * numEntries;
if (TQDebug.ArcFileDebugLevel > 1)
{
TQDebug.DebugWriteLine(string.Format(
CultureInfo.InvariantCulture,
"fileNamesOffset = {0}. Seeking to {1} to read file record data.",
fileNamesOffset,
fileRecordOffset));
}
arcFile.Seek(-1 * fileRecordOffset, SeekOrigin.End);
for (i = 0; i < numEntries; ++i)
{
records[i] = new ARCDirEntry();
// storageType = 3 - compressed / 1- non compressed
int storageType = reader.ReadInt32();
if (TQDebug.ArcFileDebugLevel > 2)
{
TQDebug.DebugWriteLine(string.Format(CultureInfo.InvariantCulture, "StorageType={0}", storageType));
}
// Added by VillageIdiot to support stored types
records[i].StorageType = storageType;
records[i].FileOffset = reader.ReadInt32();
records[i].CompressedSize = reader.ReadInt32();
records[i].RealSize = reader.ReadInt32();
int crap = reader.ReadInt32(); // crap
if (TQDebug.ArcFileDebugLevel > 2)
{
TQDebug.DebugWriteLine(string.Format(CultureInfo.InvariantCulture, "Crap2={0}", crap));
}
crap = reader.ReadInt32(); // crap
if (TQDebug.ArcFileDebugLevel > 2)
{
TQDebug.DebugWriteLine(string.Format(CultureInfo.InvariantCulture, "Crap3={0}", crap));
}
crap = reader.ReadInt32(); // crap
if (TQDebug.ArcFileDebugLevel > 2)
{
TQDebug.DebugWriteLine(string.Format(CultureInfo.InvariantCulture, "Crap4={0}", crap));
}
int numberOfParts = reader.ReadInt32();
if (numberOfParts < 1)
{
records[i].Parts = null;
if (TQDebug.ArcFileDebugLevel > 2)
{
TQDebug.DebugWriteLine(string.Format(CultureInfo.InvariantCulture, "File {0} is not compressed.", i));
}
}
else
{
records[i].Parts = new ARCPartEntry[numberOfParts];
}
int firstPart = reader.ReadInt32();
crap = reader.ReadInt32(); // filename length
if (TQDebug.ArcFileDebugLevel > 2)
{
TQDebug.DebugWriteLine(string.Format(CultureInfo.InvariantCulture, "Filename Length={0}", crap));
}
crap = reader.ReadInt32(); // filename offset
if (TQDebug.ArcFileDebugLevel > 2)
{
TQDebug.DebugWriteLine(string.Format(CultureInfo.InvariantCulture, "Filename Offset={0}", crap));
TQDebug.DebugWriteLine(string.Format(CultureInfo.InvariantCulture, "record[{0}]", i));
TQDebug.DebugWriteLine(string.Format(
CultureInfo.InvariantCulture,
" offset={0} compressedSize={1} realSize={2}",
records[i].FileOffset,
records[i].CompressedSize,
records[i].RealSize));
if (storageType != 1 && records[i].IsActive)
{
TQDebug.DebugWriteLine(string.Format(
CultureInfo.InvariantCulture,
" numParts={0} firstPart={1} lastPart={2}",
records[i].Parts.Length,
firstPart,
firstPart + records[i].Parts.Length - 1));
}
else
{
TQDebug.DebugWriteLine(string.Format(CultureInfo.InvariantCulture, " INACTIVE firstPart={0}", firstPart));
}
}
if (storageType != 1 && records[i].IsActive)
{
for (int ip = 0; ip < records[i].Parts.Length; ++ip)
{
records[i].Parts[ip] = parts[ip + firstPart];
}
}
}
// Now read in the record names
arcFile.Seek(fileNamesOffset, SeekOrigin.Begin);
byte[] buffer = new byte[2048];
ASCIIEncoding ascii = new ASCIIEncoding();
for (i = 0; i < numEntries; ++i)
{
// only Active files have a filename entry
if (records[i].IsActive)
{
// For each string, read bytes until I hit a 0x00 byte.
if (TQDebug.ArcFileDebugLevel > 2)
{
TQDebug.DebugWriteLine(string.Format(CultureInfo.InvariantCulture, "Reading entry name {0:n0}", i));
}
int bufferSize = 0;
while ((buffer[bufferSize++] = reader.ReadByte()) != 0x00)
{
if (buffer[bufferSize - 1] == 0x03)
{
// File is null?
arcFile.Seek(-1, SeekOrigin.Current); // backup
bufferSize--;
buffer[bufferSize] = 0x00;
if (TQDebug.ArcFileDebugLevel > 2)
{
TQDebug.DebugWriteLine("Null file - inactive?");
}
break;
}
if (bufferSize >= buffer.Length)
{
TQDebug.DebugWriteLine("ARCFile.ReadARCToC() Error - Buffer size of 2048 has been exceeded.");
if (TQDebug.ArcFileDebugLevel > 2)
{
TQDebug.DebugWriteLine("Buffer contents:\n");
for (int j = 0; j < bufferSize; ++j)
{
TQDebug.DebugWrite(string.Format(CultureInfo.InvariantCulture, "0x{0:X}", buffer[j]));
}
TQDebug.DebugWriteLine(String.Empty);
}
}
}
if (TQDebug.ArcFileDebugLevel > 2)
{
TQDebug.DebugWriteLine(string.Format(
CultureInfo.InvariantCulture,
"Read {0:n0} bytes for name. Converting to string.",
bufferSize));
}
string newfile;
if (bufferSize >= 1)
{
// Now convert the buffer to a string
char[] chars = new char[ascii.GetCharCount(buffer, 0, bufferSize - 1)];
ascii.GetChars(buffer, 0, bufferSize - 1, chars, 0);
newfile = new string(chars);
}
else
{
newfile = string.Format(CultureInfo.InvariantCulture, "Null File {0}", i);
}
records[i].FileName = TQData.NormalizeRecordPath(newfile);
if (TQDebug.ArcFileDebugLevel > 2)
{
TQDebug.DebugWriteLine(string.Format(CultureInfo.InvariantCulture, "Name {0:n0} = '{1}'", i, records[i].FileName));
}
}
}
// Now convert the array of records into a Dictionary.
Dictionary <string, ARCDirEntry> dictionary = new Dictionary <string, ARCDirEntry>(numEntries);
if (TQDebug.ArcFileDebugLevel > 1)
{
TQDebug.DebugWriteLine("Creating Dictionary");
}
for (i = 0; i < numEntries; ++i)
{
if (records[i].IsActive)
{
dictionary.Add(records[i].FileName, records[i]);
}
}
this.directoryEntries = dictionary;
if (TQDebug.ArcFileDebugLevel > 0)
{
TQDebug.DebugWriteLine("Exiting ARCFile.ReadARCToC()");
}
}
}
}
catch (IOException exception)
{
// Turn on debugging.
if (!TQDebug.DebugEnabled)
{
TQDebug.DebugEnabled = true;
}
// Write the errors to the debug log.
TQDebug.DebugWriteLine("ARCFile.ReadARCToC() - Error reading arcfile");
TQDebug.DebugWriteLine(exception.ToString());
}
}
