public IBigFileFileInfo[] ReadFileInfos(Stream stream, ref BigFileSegmentHeader segmentHeader, ref BigFileHeaderStruct header)
{
if (version == null)
{
throw new NullReferenceException("Version cannot be null!");
}
log.Info("Reading big file file infos, count: {0}", header.Files);
BigFileVersions.DebugLogVersion(version, log);
diag.StartStopwatch();
IBigFileFileInfo[] infos = new IBigFileFileInfo[header.Files];
IBigFileFileInfo tmpInfo = version.CreateFileInfo();
int fileOffset = segmentHeader.InfoOffset + header.StructSize;
log.Debug("File info offset: {0:X8}", fileOffset);
byte[] buffer = buffers[tmpInfo.StructSize];
stream.Seek(fileOffset, SeekOrigin.Begin);
for (int i = 0; i < header.Files; i++)
{
stream.Read(buffer, 0, tmpInfo.StructSize);
infos[i] = tmpInfo.FromBytes(buffer);
infos[i].DebugLog(log);
}
log.Info("File infos read! Time taken: {0}ms", diag.StopwatchTime);
log.Info("File count: {0}", header.Files);
return(infos);
}
public IBigFileFolderInfo[] ReadFolderInfos(Stream stream, ref BigFileSegmentHeader segmentHeader, ref BigFileHeaderStruct header)
{
if (version == null)
{
throw new NullReferenceException("Version cannot be null!");
}
log.Info("Reading big file folders, count: {0}", header.Folders);
BigFileVersions.DebugLogVersion(version, log);
diag.StartStopwatch();
IBigFileFolderInfo[] infos = new IBigFileFolderInfo[header.Folders];
IBigFileFolderInfo tmpInfo = version.CreateFolderInfo();
int folderOffset = BigFileUtil.CalculateFolderOffset(version, ref segmentHeader, ref header);
byte[] buffer = buffers[tmpInfo.StructSize];
stream.Seek(folderOffset, SeekOrigin.Begin);
for (short i = 0; i < header.Folders; i++)
{
stream.Read(buffer, 0, tmpInfo.StructSize);
infos[i] = tmpInfo.FromBytes(buffer);
infos[i].DebugLog(log);
}
log.Info("Folder infos read! Time taken: {0}ms", diag.StopwatchTime);
return(infos);
}
public static int CalculateFolderOffset(IBigFileVersion version, ref BigFileSegmentHeader segmentHeader, ref BigFileHeaderStruct header)
{
if (version == null)
{
throw new NullReferenceException("There's no version! Can't calculate folder offset!");
}
IBigFileFileInfo tmpFileInfo = version.CreateFileInfo();
int baseSize = (segmentHeader.InfoOffset + header.StructSize) + (header.Files * tmpFileInfo.StructSize);
baseSize = (((baseSize - 1) / 8) + 1) * 8; // align to 8 bytes
return(baseSize);
}
public void WriteSegmentHeader(ref BigFileSegmentHeader header)
{
if (fileInfo == null || !fileInfo.Exists)
{
throw new IOException("Can't write segment header!");
}
log.Info("Writing segment header to file: " + fileInfo.FullName);
using (FileStream fs = File.OpenWrite(fileInfo.FullName))
{
WriteSegmentHeader(fs, ref header);
}
}
public static int CalculateDataOffset(IBigFileVersion version, ref BigFileSegmentHeader segmentHeader, ref BigFileHeaderStruct header)
{
if (version == null)
{
throw new NullReferenceException("There's no version! Can't calculate data offset!");
}
IBigFileFolderInfo tmpFolderInfo = version.CreateFolderInfo();
int folderOffset = CalculateFolderOffset(version, ref segmentHeader, ref header);
int dataOffset = folderOffset + (header.Folders * tmpFolderInfo.StructSize);
dataOffset = (((dataOffset - 1) / 8) + 1) * 8; // align to 8 bytes;
return(dataOffset);
}
public void WriteHeader(ref BigFileSegmentHeader segmentHeader, ref BigFileHeaderStruct header)
{
if (fileInfo == null || !fileInfo.Exists)
{
throw new IOException("Can't read header!");
}
log.Info("Writing header to file: " + fileInfo.FullName);
using (FileStream fs = File.OpenWrite(fileInfo.FullName))
{
fs.Seek(segmentHeader.InfoOffset, SeekOrigin.Begin);
WriteHeader(fs, ref header);
}
}
public IBigFileFileInfo[] ReadFileInfos(ref BigFileSegmentHeader segmentHeader, ref BigFileHeaderStruct header)
{
if (fileInfo == null || !fileInfo.Exists)
{
throw new Exception("File info cannot be null!");
}
log.Debug("Reading file infos from file {0}", fileInfo.FullName);
IBigFileFileInfo[] infos;
using (FileStream fs = File.OpenRead(fileInfo.FullName))
{
infos = ReadFileInfos(fs, ref segmentHeader, ref header);
}
return(infos);
}
public void WriteFolderInfos(ref BigFileSegmentHeader segmentHeader, ref BigFileHeaderStruct header, IBigFileFolderInfo[] infos)
{
if (fileInfo == null || !fileInfo.Exists)
{
throw new Exception("File info cannot be null!");
}
log.Debug("Writing folder infos to file {0}", fileInfo.FullName);
using (FileStream fs = File.OpenWrite(fileInfo.FullName))
{
int folderOffset = BigFileUtil.CalculateFolderOffset(version, ref segmentHeader, ref header);
fs.Seek(folderOffset, SeekOrigin.Begin);
WriteFolderInfos(fs, infos);
}
}
public void WriteFileInfos(ref BigFileSegmentHeader segmentHeader, ref BigFileHeaderStruct header, IBigFileFileInfo[] infos)
{
if (fileInfo == null || !fileInfo.Exists)
{
throw new Exception("File info cannot be null!");
}
log.Debug("Writing file infos to file {0}", fileInfo.FullName);
using (FileStream fs = File.OpenWrite(fileInfo.FullName))
{
int fileOffset = segmentHeader.InfoOffset + header.StructSize;
fs.Seek(fileOffset, SeekOrigin.Begin);
WriteFileInfos(fs, infos);
}
}
public BigFileHeaderStruct ReadHeader(Stream stream, ref BigFileSegmentHeader segmentHeader)
{
BigFileHeaderStruct header = new BigFileHeaderStruct();
log.Info("Reading big file header...");
log.Debug("Header struct size: " + header.StructSize);
byte[] buffer = buffers[header.StructSize];
stream.Seek(segmentHeader.InfoOffset, SeekOrigin.Begin);
stream.Read(buffer, 0, header.StructSize);
header = MarshalUtil.BytesToStruct <BigFileHeaderStruct>(buffer);
log.Info("Header read!");
return(header);
}
public BigFileHeaderStruct ReadHeader(ref BigFileSegmentHeader segmentHeader)
{
if (fileInfo == null || !fileInfo.Exists)
{
throw new IOException("Can't read header!");
}
log.Info("Reading header from file: " + fileInfo.FullName);
BigFileHeaderStruct header;
using (FileStream fs = File.OpenRead(fileInfo.FullName))
{
header = ReadHeader(fs, ref segmentHeader);
}
return(header);
}
public BigFileSegmentHeader ReadSegmentHeader(Stream stream)
{
BigFileSegmentHeader header = new BigFileSegmentHeader();
log.Info("Reading segment header...");
log.Debug("Header struct size: " + header.StructSize);
byte[] buffer = buffers[header.StructSize];
stream.Read(buffer, 0, header.StructSize);
header = MarshalUtil.BytesToStruct <BigFileSegmentHeader>(buffer);
header.DebugLog(log);
log.Info("Segment header read!");
return(header);
}
public void WriteSegmentHeader(Stream stream, ref BigFileSegmentHeader header)
{
log.Info("Writing segment header...");
byte[] buffer = buffers[header.StructSize];
int headerSize = MarshalUtil.StructToBytes <BigFileSegmentHeader>(header, buffer);
stream.Write(buffer, 0, headerSize);
int blankBytesToWrite = (header.InfoOffset - header.StructSize);
log.Debug("Blank bytes: " + blankBytesToWrite.ToString());
for (int i = 0; i < blankBytesToWrite; i++)
{
stream.WriteByte(0x00);
}
log.Info("Segment header written!");
}
public int CalculateDataOffset(ref BigFileSegmentHeader segmentHeader, ref BigFileHeaderStruct header)
{
return(CalculateDataOffset(this.version, ref segmentHeader, ref header));
}
