/// <summary>
/// Decodes the ARZ file.
/// </summary>
/// <param name="inReader">input BinaryReader</param>
/// <param name="baseOffset">Offset in the file.</param>
/// <param name="arzFile">ArzFile instance which we are operating.</param>
public void Decode(BinaryReader inReader, int baseOffset, ArzFile arzFile)
{
// Record Entry Format
// 0x0000 int32 stringEntryID (dbr filename)
// 0x0004 int32 string length
// 0x0008 string (record type)
// 0x00?? int32 offset
// 0x00?? int32 length in bytes
// 0x00?? int32 timestamp?
// 0x00?? int32 timestamp?
this.idStringIndex = inReader.ReadInt32();
this.RecordType = TQData.ReadCString(inReader);
this.offset = inReader.ReadInt32() + baseOffset;
// Compressed size
// We throw it away and just advance the offset in the file.
inReader.ReadInt32();
// Crap1 - timestamp?
// We throw it away and just advance the offset in the file.
inReader.ReadInt32();
// Crap2 - timestamp?
// We throw it away and just advance the offset in the file.
inReader.ReadInt32();
// Get the ID string
this.ID = arzFile.Getstring(this.idStringIndex);
}
/// <summary>
/// Decompresses the ARZ file into an array of bytes.
/// </summary>
/// <param name="arzFile">ArzFile which we are decompressing.</param>
/// <returns>Returns a byte array containing the raw data.</returns>
private byte[] DecompressBytes(ArzFile arzFile)
{
if (arzFile == null)
{
throw new ArgumentNullException("arzFile", "arzFile is null.");
}
// Read in the compressed data and decompress it, storing the results in a memorystream
using (FileStream arzStream = new FileStream(arzFile.fileName, FileMode.Open, FileAccess.Read, FileShare.Read))
{
arzStream.Seek(this.offset, SeekOrigin.Begin);
// Ignore the zlib compression method.
arzStream.ReadByte();
// Ignore the zlib compression flags.
arzStream.ReadByte();
// Create a deflate stream.
using (DeflateStream deflate = new DeflateStream(arzStream, CompressionMode.Decompress))
{
// Create a memorystream to hold the decompressed data
using (MemoryStream outStream = new MemoryStream())
{
// Now decompress
byte[] buffer = new byte[1024];
int len;
while ((len = deflate.Read(buffer, 0, 1024)) > 0)
{
outStream.Write(buffer, 0, len);
}
// Return the decompressed data
return(outStream.ToArray());
}
}
}
}
/// <summary>
/// Decompresses an individual record.
/// </summary>
/// <param name="arzFile">ARZ file which we are decompressing.</param>
/// <returns>decompressed DBRecord.</returns>
public DBRecordCollection Decompress(ArzFile arzFile)
{
// record variables have this format:
// 0x00 int16 specifies data type:
// 0x0000 = int - data will be an int32
// 0x0001 = float - data will be a Single
// 0x0002 = string - data will be an int32 that is index into string table
// 0x0003 = bool - data will be an int32
// 0x02 int16 specifies number of values (usually 1, but sometimes more (for arrays)
// 0x04 int32 key string ID (the id into the string table for this variable name
// 0x08 data value
byte[] data = this.DecompressBytes(arzFile);
int numberOfDWords = data.Length / 4;
if (data.Length % 4 != 0)
{
// Turn on debugging so we can log the exception.
if (!TQDebug.DebugEnabled)
{
TQDebug.DebugEnabled = true;
}
TQDebug.DebugWriteLine(string.Format(CultureInfo.InvariantCulture, "Error in ARZFile - {0}", arzFile.fileName));
TQDebug.DebugWriteLine(string.Format(CultureInfo.InvariantCulture, "Error while parsing arz record {0}, data Length = {1} which is not a multiple of 4", this.ID, (int)data.Length));
throw new ArgumentException(string.Format(CultureInfo.InvariantCulture, "Error while parsing arz record {0}, data Length = {1} which is not a multiple of 4", this.ID, (int)data.Length));
}
DBRecordCollection record = new DBRecordCollection(this.ID, this.RecordType);
// Create a memory stream to read the binary data
using (BinaryReader inReader = new BinaryReader(new MemoryStream(data, false)))
{
int i = 0;
while (i < numberOfDWords)
{
short dataType = inReader.ReadInt16();
short valCount = inReader.ReadInt16();
int variableID = inReader.ReadInt32();
string variableName = arzFile.Getstring(variableID);
if (variableName == null)
{
// Turn on debugging so we can log the exception.
if (!TQDebug.DebugEnabled)
{
TQDebug.DebugEnabled = true;
}
TQDebug.DebugWriteLine(string.Format(CultureInfo.InvariantCulture, "Error in ARZFile - {0}", arzFile.fileName));
TQDebug.DebugWriteLine(string.Format(CultureInfo.InvariantCulture, "Error while parsing arz record {0}, variable is NULL", this.ID));
throw new ArgumentNullException(string.Format(CultureInfo.InvariantCulture, "Error while parsing arz record {0}, variable is NULL", this.ID));
}
if (dataType < 0 || dataType > 3)
{
// Turn on debugging so we can log the exception.
if (!TQDebug.DebugEnabled)
{
TQDebug.DebugEnabled = true;
}
TQDebug.DebugWriteLine(string.Format(CultureInfo.InvariantCulture, "Error in ARZFile - {0}", arzFile.fileName));
TQDebug.DebugWriteLine(string.Format(CultureInfo.InvariantCulture, "Error while parsing arz record {0}, variable {1}, bad dataType {2}", this.ID, variableName, dataType));
throw new ArgumentOutOfRangeException(string.Format(CultureInfo.InvariantCulture, "Error while parsing arz record {0}, variable {1}, bad dataType {2}", this.ID, variableName, dataType));
}
Variable v = new Variable(variableName, (VariableDataType)dataType, valCount);
if (valCount < 1)
{
// Turn on debugging so we can log the exception.
if (!TQDebug.DebugEnabled)
{
TQDebug.DebugEnabled = true;
}
TQDebug.DebugWriteLine(string.Format(CultureInfo.InvariantCulture, "Error in ARZFile - {0}", arzFile.fileName));
TQDebug.DebugWriteLine(string.Format(CultureInfo.InvariantCulture, "Error while parsing arz record {0}, variable {1}, bad valCount {2}", this.ID, variableName, valCount));
throw new ArgumentException(string.Format(CultureInfo.InvariantCulture, "Error while parsing arz record {0}, variable {1}, bad valCount {2}", this.ID, variableName, valCount));
}
// increment our dword count
i += 2 + valCount;
for (int j = 0; j < valCount; ++j)
{
switch (v.DataType)
{
case VariableDataType.Integer:
case VariableDataType.Boolean:
{
int val = inReader.ReadInt32();
v[j] = val;
break;
}
case VariableDataType.Float:
{
float val = inReader.ReadSingle();
v[j] = val;
break;
}
case VariableDataType.StringVar:
{
int id = inReader.ReadInt32();
string val = arzFile.Getstring(id);
if (val == null)
{
val = string.Empty;
}
else
{
val = val.Trim();
}
v[j] = val;
break;
}
default:
{
int val = inReader.ReadInt32();
v[j] = val;
break;
}
}
}
record.Set(v);
}
}
return(record);
}
